WO2017044507A2 - Sirna/nanoparticle formulations for treatment of middle-east respiratory syndrome coronaviral infection - Google Patents

Sirna/nanoparticle formulations for treatment of middle-east respiratory syndrome coronaviral infection Download PDF

Info

Publication number
WO2017044507A2
WO2017044507A2 PCT/US2016/050590 US2016050590W WO2017044507A2 WO 2017044507 A2 WO2017044507 A2 WO 2017044507A2 US 2016050590 W US2016050590 W US 2016050590W WO 2017044507 A2 WO2017044507 A2 WO 2017044507A2
Authority
WO
WIPO (PCT)
Prior art keywords
sirna
composition
mers
protein
nsp3
Prior art date
Application number
PCT/US2016/050590
Other languages
French (fr)
Other versions
WO2017044507A3 (en
Inventor
Patrick Y. Lu
Vera Simonenko
Yibin CAI
John Xu
David Evans
Original Assignee
Sirnaomics, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sirnaomics, Inc. filed Critical Sirnaomics, Inc.
Priority to US15/758,312 priority Critical patent/US11058779B2/en
Publication of WO2017044507A2 publication Critical patent/WO2017044507A2/en
Publication of WO2017044507A3 publication Critical patent/WO2017044507A3/en
Priority to US17/373,361 priority patent/US20220145301A1/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/10Dispersions; Emulsions
    • A61K9/127Liposomes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K48/00Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy
    • A61K48/005Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy characterised by an aspect of the 'active' part of the composition delivered, i.e. the nucleic acid delivered
    • A61K48/0066Manipulation of the nucleic acid to modify its expression pattern, e.g. enhance its duration of expression, achieved by the presence of particular introns in the delivered nucleic acid
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/06Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
    • A61K47/28Steroids, e.g. cholesterol, bile acids or glycyrrhetinic acid
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/50Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
    • A61K47/51Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
    • A61K47/54Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic compound
    • A61K47/543Lipids, e.g. triglycerides; Polyamines, e.g. spermine or spermidine
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K48/00Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy
    • A61K48/0008Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy characterised by an aspect of the 'non-active' part of the composition delivered, e.g. wherein such 'non-active' part is not delivered simultaneously with the 'active' part of the composition
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/48Preparations in capsules, e.g. of gelatin, of chocolate
    • A61K9/50Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
    • A61K9/51Nanocapsules; Nanoparticles
    • A61K9/5107Excipients; Inactive ingredients
    • A61K9/513Organic macromolecular compounds; Dendrimers
    • A61K9/5146Organic macromolecular compounds; Dendrimers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyethylene glycol, polyamines, polyanhydrides
    • A61K9/5153Polyesters, e.g. poly(lactide-co-glycolide)
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/12Antivirals
    • A61P31/14Antivirals for RNA viruses
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09Recombinant DNA-technology
    • C12N15/11DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
    • C12N15/113Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing
    • C12N15/1131Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing against viruses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y5/00Nanobiotechnology or nanomedicine, e.g. protein engineering or drug delivery
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09Recombinant DNA-technology
    • C12N15/87Introduction of foreign genetic material using processes not otherwise provided for, e.g. co-transformation
    • C12N15/88Introduction of foreign genetic material using processes not otherwise provided for, e.g. co-transformation using microencapsulation, e.g. using amphiphile liposome vesicle
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N2310/00Structure or type of the nucleic acid
    • C12N2310/10Type of nucleic acid
    • C12N2310/14Type of nucleic acid interfering N.A.
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N2320/00Applications; Uses
    • C12N2320/30Special therapeutic applications
    • C12N2320/31Combination therapy
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N2320/00Applications; Uses
    • C12N2320/30Special therapeutic applications
    • C12N2320/32Special delivery means, e.g. tissue-specific

Definitions

  • the present invention provides a pharmaceutical product composition of matter comprising siRNA sequences targeting genes or single-stranded viral RNAs of Middle-East Respiratory Syndrome Corona Virus (MERS-CoV), and nanoparticle carrier systems such as Histidine-Lysine co-polymers (HKP), or Spermine-Liposome conjugates (SLiC), or a lung tissue targeted moiety, such as a peptide, a nucleotide, a small molecule, and an antibody.
  • MERS-CoV Middle-East Respiratory Syndrome Corona Virus
  • nanoparticle carrier systems such as Histidine-Lysine co-polymers (HKP), or Spermine-Liposome conjugates (SLiC), or a lung tissue targeted moiety, such as a peptide, a nucleotide, a small molecule, and an antibody.
  • the present invention also involves in methods of use for this pharmaceutical product, including formulations of siRNA/nanoparticle carrier, their process development and specific delivery routes and regimen
  • Middle East respiratory syndrome is a highly lethal respiratory disease caused by a novel single-stranded, positive-sense RNA betacoronavirus, MERS-CoV.
  • Dromedary camels, hosts for MERS-CoV are implicated in direct or indirect transmission to human beings, although the exact mode of transmission is unknown.
  • the virus was first isolated from a patient who died from a severe respiratory illness in June, 2012, in Jeddah, Saudi Arabia. As of May 31, 2015, 1180 laboratory-confirmed cases (483 deaths; 40% mortality) have been reported to WHO ⁇ Zumbla A. et al. 2015).
  • the Centers for Disease Control and Prevention has labelled it as a transmissible disease from human-to-humans. (Jalal S. 2015). Although most cases of MERS have occurred in Saudi Arabia and the United Arab Emirates, cases have been reported in Europe, the USA, and Asia in people who travelled from the Middle East or their contacts. Clinical features of MERS range from asymptomatic or mild disease to acute respiratory distress syndrome and multiorgan failure, resulting in death, especially in individuals with underlying comorbidities. No specific drug treatment exists for MERS and infection prevention, and control measures are crucial to prevent spread in health-care facilities ⁇ Zumbla A. Et al 2015).
  • MERS-CoV is an enveloped single-stranded positive sense RNA virus with a genome of 30, 119 nt.
  • the genome structure of MERS-CoV is similar to other coronaviruses, with the 5' two-thirds of the genome encoding the non- structural proteins (NSPs) required for viral genome replication, the remaining 3' third of the genome encoding the structural genes that make up the virion (spike, envelope, membrane, and nucleocapsid proteins), and four accessory genes interspersed within the structural gene region.
  • NSPs non- structural proteins
  • RNA genome contains at least 10 predicted open reading frames (ORFs): ORFla, ORFlb, S, 3, 4a, 4b, 5, E, M and N with sixteen predicted nonstructural proteins being encoded by ORF 1 a/b .
  • ORFs predicted open reading frames
  • ORF2 Open reading frames ORF2, -6, - 7 and -8a are translated from subgenomic mRNAs predicted to encode the four canonical structural genes: a 180/90-kDa spike glycoprotein (S), a ⁇ 23-kDa membrane glycoprotein (M), a small envelope protein (E) and a ⁇ 50-kDa nucleocapsidprotein (N), respectively (Abdel- Moneim AS. 2014).
  • DPP4 dipeptidyl peptidase 4
  • endothelial cells kidney, lung, small intestine, spleen
  • enterocytes activated leukocytes
  • testes prostate and cells of the renal glomeruli and proximal tubules.
  • DPP4 recognition is mediated by the receptor- binding domain (RBD, amino acids E367- Y606) (PascalK, etal. 2015).
  • RBD receptor- binding domain
  • coronavirus genome a positive sense, capped and polyadeny!ated RNA strand, is directly translated, resulting in the synthesis of coronavirus replicase gene-encoded NSPs.
  • Coronavirus NSPs are translated as two large polyproteins harboring proteolytic enzymes, namely papain- like and chymotrypsin-iike proteinases that extensively process coronavirus polyproteins to liberate up to 16 NSPs (nsp 1-16) (Lundin A. et al. 2014).
  • the virus After entering into the cell, the virus specially modulates the innate immune response, antigen presentation, and mitogen-activated protein kinase.
  • MERS-CoV Although the emergence of highly pathogenic MERS-CoV highlights an urgent need for potent therapeutic and prophylactic agents, no approved antiviral treatments for any human coronavirus infections are currently available. Supportive treatment with extracorporeal membrane oxygenation and dialysis is often required in patients with organ failure. Recently, tremendous efforts have been made in the search for an effective anti-MERS-CoV agent, and a number of antiviral agents have been identified. For example, some compounds with inhibitory activities in the low micromolar range on MERS-CoV replication in cell cultures have been identified from the libraries of FDA-approved drugs, de Wilde AH.
  • Antivirals with potent in vitro activities also include neutralizing monoclonal antibodies, antiviral peptides, interferons, mycophenolic acid. It was reported that rhesus macaques treated with a cocktail of IFN-a2b with ribavirin, a nucleoside analog, exhibited reduced MERS-CoV replication and an improved clinical outcome (Falzarano D, et al. 2013). Lu L. and colleges designed and synthesized a peptide (HR2P) derived from the HR2 domain in the S2 subunit of the spike (S) protein of the MERS-CoV EMC/2012 strain.
  • HR2P peptide
  • HR2P could bind with the HRl domain to form a stable six-helix bundle and thus inhibit viral fusion core formation and S protein- mediated cell-cell fusion.
  • HR2P was demonstrated to potently inhibit infection by both pseudotyped and live MERS-CoV in different cell lines. After modification of the HR2P peptide by introducing Glu (E) and Lys (K) residues at the i to i+4 or i to i+3 arrangements, it was found that one of these HR2P analogous peptides, HR2P-M2, exhibited significantly improved stability, solubility and antiviral activity.
  • HR2P-M2 peptide could potently inhibit infection by pseudoviruses expressing MERS-CoV S protein with or without mutation in the HR1 region, suggesting that it could be effective against most currently available MERS-CoV mutants. It was demonstrated that the HR2P-M2 peptide administered via the intranasal route could protect Ad5-hDPP4-transduced mice from challenge by MERS- CoV strains with or without mutations in the HR1 region, indicating that this peptide could be used as a nasal spray to protect high-risk populations, including healthcare workers, MERS patients' family members, and those having close contacts with the patients, from MERS-CoV infection.
  • Intranasal application of the peptide to MERS-CoV-infected patients may suppress viral replication in epithelial cells of the respiratory tract and thus reduce the release of virions, thereby preventing the spreading of MERS-CoV to other people (Lu L. et al. 2015).
  • Another approach is passive administration of sera from convalescent human MERS patients or other animals to exposed or infected patients.
  • the vast majority of camels in the Middle East have been infected with MERS-CoV, and some contain high titers of antibody to the virus. It was shown that this antibody is protective if delivered either prophylactically or therapeutically to mice infected with MERS-CoV, indicating that this may be a useful intervention in infected patients ⁇ Zhao J et al. 2015) .
  • the three identified mAbs all derived from the VH gene 1-69, which has been the source of many other antiviral antibodies, exhibited exceptionally potent activity and neutralized pseudotyped MERS-CoV with 50% inhibitory concentration (IC50), ranging from 0.005 to 0.017 mg/ml.
  • IC50 50% inhibitory concentration
  • m336 showed the most potent live MERS-CoV neutralizing activity in inhibiting the formation of MERS- CoV-induced CPE during live MERS-CoV infection of permissive Vero E6 cells, with an IC50 of 0.07 mg/ml.
  • Jiang and colleges also identified two potent RBD-specific neutralizing mAbs, MERS-4 and MERS-27, by using a non-immune yeast-displayed scFv library to screen against the recombinant MERS-CoV RBD.
  • the most potent mAb, MERS-4 neutralized the pseudotyped MERS-CoV infection in DPP4- expressing Huh-7 cells with an IC50 of 0.056 mg/ml and inhibited the formation of MERS-CoV-induced CPE during live MERS-CoV infection of permissive Vero E6 cells with an IC50 of 0.5 mg/ml.
  • Tang et colleges identified neutralizing mAbs by using a non-immune phage-displayed scFv library.
  • the panning was performed by sequentially using MERS-CoV spike-containing paramagnetic proteoliposomes and MERS- CoV S glycoprotein-expressing 293T cells as antigens.
  • a panel of 7 anti-Si scFvs was identified and expressed in both scFv-Fc and IgGl formats, and their neutralizing activity against pseudotyped MERS-CoV in DPP4-expressing 293T cells, as well as live MERS-CoV infection in Vero cells, was measured.
  • Coronaviruses are enveloped viruses and their positive strand RNA genome, the largest of all RNA viruses, encodes for as many as 16 non-structural proteins (NSPs), 4 major structural proteins, and up to 8 accessory proteins. Many of these proteins provide essential, frequently enzymatic, functions during the viral life cycle, such as coronaviais protease or RNA-dependent RNA polymerase (RdRp) activities.
  • S spike
  • S protein mediates binding of different HCoVs to their specific cellular receptors, an event associated with preferential virus tropism for either ciliated or non-ciliated cells of the airway epithelium.
  • the S protein also mediates fusion between lipids of the viral envelope and the host cell plasma membrane or membranes of endocytic vesicles to promote delivery of viral genomic RNA into the cytoplasm .
  • the coronavirus genome a positive sense, capped and polyadenylated RNA strand, is directly translated, resulting in the synthesis of coronaviais replicase gene-encoded NSPs.
  • Coronavirus NSPs are translated as two large polyproteins harboring proteolytic enzymes, namely papain-like and chymotrypsin-like proteinases that extensively process coronavirus polyproteins to liberate up to 16 NSPs (nsp 1-16), These proteolytic functions are considered essential for coronavirus replication.
  • coronavirus RdRp activities which reside in nsp8 and nsp 12, are considered essential for coronaviais replication.
  • Coronaviruses encode an array of RNA -processing enzymes. These include a helicase activity linked to an NTPase activity in nspl3, a 3'-5'-exonuclease activity linked to a ' N7-methy!transf erase activity in nspl4, an endonuclease activity in nspl 5, and a 2' ⁇ O-methyltransferase activity in nsp 16.
  • coronaviruses Like all positive strand RNA viruses, coronaviruses synthesize viral RNA at organelle- like structures in order to compartmentalize this critical step of the viral life cycle to a specialized environment that is enriched in replicative viral and host-cell factors, and at the same time protected from antiviral host defense mechanisms.
  • Three coronaviral NSPs, i .e., nsp3, nsp4, and nsp6 are thought to participate in formation of these sites for viral RNA synthesis.
  • these proteins contain multiple trans-membrane domains that are thougfvi to anchor the coronavirus replication complex through recruitment of intracellular membranes to form a reticuiovesicular network (RV ) of modified, frequently paired, membranes that includes convoluted membranes and double membrane vesicles (DVM) interconnected via the outer membrane with the rough ER.
  • RV reticuiovesicular network
  • DVM double membrane vesicles
  • MERS-CoV can replicate in different mammalian cell lines. In humans, it can replicate in the respiratory tract (lung adenocarcinoma cell line A549, embryonic fibroblast cell line HFL and polarized airway epithelium cell line Calu-3), kidney (embryonic kidney cell line; HEK), liver cells (hepatocellular carcinoma cell line; Huh-7), and the intestinal tract (colorectal adenocarcinoma cell line; Caco-2). MERS-CoV can also infect cell lines originating from primates, pigs, bats, civet cats and rabbits (Chan et al. 2013).
  • Zhao J and colleges described a novel approach to developing a mouse model for MERS by transducing mice with a recombinant, nonreplicating adenovirus expressing the hDPP4 receptor. After infection with MERS-CoV, mice develop an interstitial pneumonia. Similar to infected patients, Ad5-hDPP4-transduced mice with normal immune systems developed mild disease whereas immunocompromised mice, like patients with underlying diseases, were more profoundly affected. It was shown that these transduced, infected mice can be used to determine antivirus immune responses and to evaluate anti-MERS-CoV vaccines and therapies ⁇ Zhao J et al. 2014). Two Mouse Models have been developed Pascal K et al.
  • a modified adenovirus expressing huDPP4 was administered intranasally to mice leading to huDPP4 expression in all cells of the lung, not just those that natively express DPP4.
  • mice showed transient huDPP4 expression and mild lung disease.
  • a transgenic mouse was produced to expresses huDPP4 in all cells of the body, which in not physiologically relevant.
  • MERS-CoV infection leads to high levels of viral RNA and inflammation in the lungs, and also significant inflammation and viral RNA in the brains of infected mice.
  • no previous reports have documented tropism of MERS-CoV to the brains of an infected host, suggesting that studying pathogenesis of MERS-CoV in this model is limited.
  • RNA interference is a sequence-specific RNA degradation process that provides a direct way to knockdown, or silence, theoretically any gene.
  • RNA interference a double stranded RNA is cleaved by an RNase Ill/helicase protein, Dicer, into small interfering RNA (siRNA) molecules, a dsRNA of 19-23 nucleotides (nt) with 2-nt overhangs at the 3' ends.
  • siRNA small interfering RNA
  • nt small interfering RNA
  • RISC RNA-induced-silencing-complex
  • siRNA One strand of siRNA remains associated with RISC, and guides the complex towards a cognate RNA that has sequence complementary to the guider ss-siRNA in RISC. This siRNA-directed endonuclease digests the RNA, thereby inactivating it.
  • Studies have revealed that the use of chemically synthesized 21-25-nt siRNAs exhibit RNAi effects in mammalian cells, and the thermodynamic stability of siRNA hybridization (at terminals or in the middle) plays a central role in determining the molecule's function.
  • MERS-CoV is enveloped single-stranded positive-sense RNA viruses, belonging to genus Betacoronavirus.
  • the length of the genome is around 30k nt.
  • the genome contains 10 predicted open reading frames (ORFs): ORFla, ORFlb, Spike (S) Protein, 3, 4a, 4b, 5,
  • E Envelope (E) Protein, Membrane (M) Protein and Nucleocapsid (N) Protein, with 5' two third of the genome (ORFla, ORFlb) encoding 16 non-structure proteins (nspl-16), and rest 3' third of the genome encoding 4 structure proteins (S, E, M and N proteins).
  • the spike (S) protein of MERS-CoV is a glycoprotein with a molecular weight of -180/190 kDa, which is an important determinant of virus virulence and host range. Trimers of S protein form the spikes on the MERS-CoV envelope, which are responsible for the receptor binding and membrane fusion. Similar to the HIV envelope (env) and influenza hemagglutinin (HA), S proteins of MERS-CoV are Class I viral fusion proteins, which requires the protease cleavage between the SI and S2 domains to allow the conformational changes in S2, and initiate the virus entry and syncytia formation. Dipeptidyl peptidase 4
  • DDP4 a protein with diverse functions in glucose homeostasis, T-cell activation, etc.
  • RBD receptor-binding domain
  • DPP4 is expressed in a variety of cell types. It has been discovered on the human cell surface in the airways (such as the lungs) and kidneys recently.
  • MERS-CoV After entry into the cell, two polyproteins, ppla and pplab of MERS-CoV express and undergo cotranslational proteolytic processing into the proteins that form the viral replication complex. During this processing, the activity of nsp-3, papain-like protease (PLpro) and nsp-5, 3C-like proteinase (3CLpro) are critical for the generation of 16 nonstructural proteins from the polyprotein.
  • PLpro papain-like protease
  • 3CLpro 3C-like proteinase
  • MERS-CoV PL pro also has the function to inhibit the innate immune response to viral infection by decreasing the levels of ubiquitinated and ISGylated host cell proteins and down-regulating the cytokines, such as CCL5 and IFN- ⁇ in stimulated cells.
  • MERS-CoV RNA-dependent RNA polymerase encoding by nsp-12
  • RdRp MERS-CoV RNA-dependent RNA polymerase
  • This complex is responsible for both the transcription of the nested subgenomic mRNAs and the replication of the genomic positive-strand RNA. Both processes take place in the cytoplasm.
  • the negative- strand RNAs generate from genomic RNA at first, and then transcribe a set of 3 '-coterminal nested subgenomic mRNAs by the replication complex, with a common 5' "leader" sequence (67nt) derived from the 5' end of the genome.
  • the newly synthetic genomic RNAs are produced by the taking the negative- strand RNAs as the template.
  • FIG. 1 The genome structure of MERS-CoV MERS-CoV is enveloped single-stranded positive-sense RNA viruses, belonging to genus Betacoronavirus, with a genome of ⁇ 30K nt.
  • the genome contains 10 predicted open reading frames (ORFs): ORFla, ORFlb, Spike (S) Protein, 3, 4a, 4b, 5, Envelope (E) Protein, Membrane (M) Protein and Nucleocapsid (N) Protein with 16 predicted nonstructural proteins being encoded by ORFla/b.
  • ORFs predicted open reading frames
  • FIG. 1 The life cycle of MERS. After binding to the receptor, viral RNA and proteins of MERS-CoV are synthesized entirely in the cytoplasm. Two polyproteins, ppla and pplab undergo cotranslational proteolytic processing into the proteins that form the viral replication complex. This complex is used to produce the negative-strand RNA from genomic RNA, and transcribe a 3 '-coterminal set of nested subgenomic mRNAs from the negative- strand RNA, which have a common 5' "leader" sequence derived from the 5' end of the genome. This viral replication complex is also used to produce the positive-strand genomic RNA taking the negative-strand RNA as the template.
  • FIG. 1-8 Special design of siRNA sequences targeting critical viral genes: Papain like protein (PL pro ) specific siRNA, total 6 active siRNAs (MPL1-6); RNA dependent RNA protease (RDRP) specific siRNA, total 5 active siRNAs (MRRl-5) and Spike protein specific siRNA, total 8 active siRNAs (MSP 1-8).
  • PL pro Papain like protein
  • MPL1-6 total 6 active siRNAs
  • RDRP RNA dependent RNA protease
  • MRRl-5 total 5 active siRNAs
  • Spike protein specific siRNA total 8 active siRNAs
  • HKP/siRNA nanoparticle delivery to mouse respiratory track upper airway, bronchi, alveoli.
  • FIG. 1 Comparison of target knockdown of lung endogenous gene among HKP, DOTAP and D5W after oral tracheal deliveries of siRNA with three different dosing regimens. HKP demonstrated the efficient siRNA-mediated knockdown of the target gene at the 20 ⁇ g dose.
  • Ribavirin as a positive control was administered through gavages of 200ul to provide 75mg/kg/day dosing over days 1-5 (orange arrows).
  • the prophylactic efficacy of HKP-siRNA formulation is clearly better than that of Ribavirin.
  • FIG. 1 Scheme of the Basic Synthesis Routes and Structure of Spermine-Liposome Conjugates (SLiC)
  • TM4-packaged siRNA specific to cyclophilin-B was selected for being tested in a Balb/c mouse model through a respiratory route of delivery.
  • a HKP package cyclophilin-B siRNA was used as a positive control.
  • Three different dosage: 25, 40 and 50 ⁇ g were tested. Both 40 and 50 ⁇ g siRNA dosages achieved significant target gene silencing (N 3, *P ⁇ 0.05).
  • FIG. 10 Evaluation of the cytokine response in the mouse lung after HKP-siRNA nanoparticles delivery. HKP-siRNA at different dosages were oraltracheally administrated in the mouse lungs. The total lung tissue were harvested for protein isolation and cytokine measurements by ELISA assay.
  • Figure 11 A. Standard curve to measure protein concentration was prepared according to in- house SOP (Lowry Method); B. Total protein concentration was determined in each sample.
  • Figure 12. A. Standard curve to measure TNF-a concentration was prepared according to in- house SOP (Lowry Method); B. TNF-a concentration in each sample was determined and normalized to total protein.
  • Figure 13 A. Standard curve to measure IL-6 concentration was prepared according to in- house SOP (Lowry Method); B. IL-6 concentration in each sample was determined and normalized to total protein.
  • Figure 14 A. Standard curve to measure IFN-a concentration was prepared according to in- house SOP (Lowry Method); B. IFN-a concentration in each sample was determined and normalized to total protein.
  • Figure 15. The HKP siRNA nanoparticle aqueous solution and SLiC siRNA nanoparticle aqueous solution will be administrated through airway, using an ultrasound nebulizer generated aerosol which will have water solution particle size with broad spectrum allowing whole lung distribution.
  • the present invention provides siRNA molecules that inhibit MERS-CoV gene expression, compositions containing the molecules, and methods of using the molecules and compositions to prevent or treat MERS in a subject, such as a human patient.
  • siRNA molecule or an “siRNA duplex” is a duplex
  • oligonucleotide that is a short, double-stranded polynucleotide, that interferes with the expression of a gene in a cell, after the molecule is introduced into the cell, or interferes with the expression of a viral gene.
  • it targets and binds to a complementary nucleotide sequence in a single stranded (ss) target RNA molecule.
  • SiRNA molecules are chemically synthesized or otherwise constructed by techniques known to those skilled in the art. Such techniques are described in U.S. Pat. Nos. 5, 898,031, 6, 107,094, 6,506,559,
  • siRNA molecule when identified by a particular nucleotide sequence, the sequence refers to the sense strand of the duplex molecule.
  • One or more of the ribonucleotides comprising the molecule can be chemically modified by techniques known in the art.
  • the backbone of the oligonucleotide can be modified. Additional modifications include the use of small molecules (e.g. sugar molecules), amino acids, peptides, cholesterol, and other large molecules for conjugation onto the siRNA molecule.
  • the siRNA molecules of the invention target a conserved region of the genome of a MERS-CoV.
  • target or “targets” means that the molecule binds to a complementary nucleotide sequence in a MERS-CoV gene, which is an RNA molecule, or it binds to mRNA produced by the gene. This inhibits or silences the expression of the viral gene and/or its replication.
  • a "conserved region" of a MERS-CoV gene is a nucleotide sequence that is found in more than one strain of the virus, is identical among the strains, rarely mutates, and is critical for viral infection and/or replication and/or release from the infected cell.
  • the siRNA molecule is a double-stranded oligonucleotide with a length of about 17 to about 27 base pairs. In one aspect of this embodiment, the molecule is a double-stranded oligonucleotide with a length of 19 to 25 base pairs. In another aspect of this embodiment, the molecule is a couple- stranded oligonucleotide with a length of 19 to 25 base pairs. In still another aspect of this embodiment, it is a double-stranded oligonucleotide with a length of 25 base pairs.
  • the molecule may have blunt ends at both ends, or sticky ends with overhangs at both ends (unpaired bases extending beyond the main strand), or a blunt end at one end and a sticky end at the other. In one particular aspect, it has blunt ends at both ends. In another particular aspect, the molecule has a length of 25 base pairs (25 mer) and has blunt ends at both ends.
  • the conserved MERS-CoV genomic regions are the gene sequences coding for the MERS-CoV proteins Papain-like protease (PL pro ), RNA-dependent RNA polymerase (RdRp), and Spike protein.
  • the genomic locations of such genes are shown in Figure 3.
  • the siRNA molecule targets PL pro virus gene expression.
  • the siRNA molecule targets RdRp viral gene expression.
  • the siRNA molecule targets Spike viral gene expression.
  • siRNA molecules are disclosed in Tables 1-3.
  • the siRNA molecules are disclosed in Table 3.
  • the siRNA molecules are the following:
  • MPL4 GGCUUCAUUUUAUUUCAAAGAAUUU, MPL5: GCGCUUUUACAAAUCUAGAUAAGUU,
  • MPL6 CGCAUUGCAUGCCGUAAGUGUAAUU
  • MSP1 GGCCGUACAUAUUCUAACAUAACUA
  • MSP2 GGCCGUACAUAUUCUAACAUAACUA
  • MSP4 CCCAGUUUAAUUAUAAACAGUCCUU
  • MSP5 GGCUUCACUACAACUAAUGAAGCUU
  • MSP6 CCCCUGUUAAUGGCUACUUUAUUAA
  • MSP7 CCCUGUUAAUGGCUACUUUAUUAAA
  • MSP8 GCCGCAUAAGGUUCAUGUUCACUAA.
  • the siRNA molecules of the invention also include ones derived from those listed in Tables 1-3 and otherwise herein.
  • the derived molecules can have less than the 25 base pairs shown for each molecule, down to 17 base pairs, so long as the "core" contiguous base pairs remain. That is, once given the specific sequences shown herein, a person skilled in the art can synthesize molecules that, in effect, "remove” one or more base pairs from either or both ends in any order, leaving the remaining contiguous base pairs, creating shorter molecules that are 24, 23, 22, 21, 20, 19, 18, or 17 base pairs in length, if starting with the 25 base pair molecule.
  • the derived molecules of the 25 mer molecules disclosed in Tables 1-3 include: a) 24 contiguous base pairs of any one or more of the molecules; b) 23 contiguous base pairs of any one or more of the molecules; c) 22 contiguous base pairs of any one or more of the molecules; b) 21 contiguous base pairs of any one or more of the molecules; d) 20 contiguous base pairs of any one or more of the molecules; e) 19 contiguous base pairs of any one or more of the molecules; f) 18 contiguous base pairs of any one or more of the molecules; and g) 17 contiguous base pairs of any one or more of the molecules. It is not expected that molecules shorter than 17 base pairs would have sufficient activity or sufficiently low off-target effects to be pharmaceutically useful; however, if any such constructs did, they would be equivalents within the scope of this invention.
  • the derived molecules can have more than the 25 base pairs shown for each molecule, so long as the initial 25 contiguous base pairs remain. That is, once given the specific sequences disclosed herein, a person skilled in the art can synthesize molecules that, in effect, "add" one or more base pairs to either or both ends in any order, creating molecules that are 26 or more base pairs in length and containing the original 25 contiguous base pairs.
  • the siRNA molecule may further comprise an immune stimulatory motif.
  • Such motifs can include specific RNA sequences such as 5'-UGUGU-3' (Judge et al., Nature
  • the motif comprises 5'- UGUGU-3', 5'-GUCCUUCAA-3', 5'-GGGxGG-3' (where x is A, T, G and C), or CpG motifs 5'-GTCGTT-3'.
  • compositions The invention includes a pharmaceutical composition comprising an siRNA molecule that targets a conserved region of the genome of a MERS-CoV and a pharmaceutically acceptable carrier.
  • the carrier condenses the molecules to form a nanoparticle.
  • the composition may be formulated into nanoparticles.
  • the compositions may be lyophilized into a dry powder.
  • the pharmaceutically acceptable carrier comprises a polymeric nanoparticle or a liposomal nanoparticle.
  • the composition comprises at least two different siRNA molecules that target one or more conserved regions of the genome of a MERS-CoV and a pharmaceutically acceptable carrier.
  • the gene sequences in the conserved regions of the MERS-CoV are critical for the viral infection of a mammal.
  • mammal is a human, mouse, ferret, or monkey.
  • the composition can include one or more additional siRNA molecules that target still other conserved regions of the MERS-CoV genome.
  • a pharmaceutically acceptable carrier comprises a polymeric nanoparticle or a liposomal nanoparticle.
  • the targeted conserved regions of the genome comprise gene sequences coding for the following MERS-CoV proteins: Papain-like protease (PL pro ), RNA- dependent RNA polymerase (RdRp), and Spike protein.
  • the siRNA molecules target PL pro viral gene expression.
  • Such siRNA molecules include the following: MPL 1 : CGC AAUACGUAAAGCU AAAGAUUAU,
  • MPL2 GGGUGUUGAUUAUACUAAGAAGUUU
  • MPL3 CGCAUAAUGGUGGUUACAAUUCUU
  • MPL4 GGCUUCAUUUUAUUUCAAAGAAUUU,
  • MPL5 GCGCUUUUACAAAUCUAGAUAAGUU
  • MPL6 CGC AUUGC AUGCCGU AAGUGUAAUU.
  • siRNA molecules target RdRp viral gene expression.
  • siRNA molecules include the following:
  • siRNA molecules target Spike viral gene expression.
  • siRNA molecules include the following: MSP 1 : GGCCGUAC AUAUUCUAAC AUAACUA,
  • MSP2 GGCCGUAC AUAUUCUAAC AUAACUA,
  • MSP4 CCCAGUUUAAUUAUAAACAGUCCUU
  • MSP5 GGCUUCACUACAACUAAUGAAGCUU
  • MSP6 CCCCUGUUAAUGGCUACUUUAUUAA
  • MSP7 CCCUGUUAAUGGCUACUUUAUUAAA
  • MSP8 GCCGCAUAAGGUUCAUGUUCACUAA.
  • the siRNA molecules are two or more of the following:
  • MPL1 CGCAAUACGUAAAGCUAAAGAUUAU
  • MPL2 GGGUGUUGAUUAUACUAAGAAGUUU
  • MPL3 CGCAUAAUGGUGGUUACAAUUCUU
  • MPL4 GGCUUCAUUUUAUUUCAAAGAAUUU,
  • MPL5 GCGCUUUUACAAAUCUAGAUAAGUU
  • MPL6 CGCAUUGCAUGCCGUAAGUGUAAUU
  • MSP1 GGCCGUACAUAUUCUAACAUAACUA
  • MSP2 GGCCGUACAUAUUCUAACAUAACUA
  • MSP4 CCCAGUUUAAUUAUAAACAGUCCUU
  • MSP5 GGCUUCACUACAACUAAUGAAGCUU
  • MSP6 CCCCUGUUAAUGGCUACUUUAUUAA
  • MSP7 CCCUGUUAAUGGCUACUUUAUUAAA
  • MSP8 GCCGCAUAAGGUUCAUGUUCACUAA.
  • the composition comprises an siRNA cocktail, MST PR1 , wherein a first siRNA molecule comprises MPL1 : CGCAAUACGUAAAGCUAAAGAUUAU and a second siRNA molecule comprises MRR1 : CCCAGUGUUAUUGGUGUUUAUCAUA.
  • composition comprises an siRNA cocktail, MST PR2 , wherein a first siRNA molecule comprises MPL2:
  • GGGGUUGAUUAUACUAAGAAGUUU and a second siRNA molecule comprises MRR2: GGGAUUUCAUGCUUAAAACAUUGUA.
  • composition comprises an siRNA cocktail, MST RS2 , wherein a first siRNA molecule comprises MRR2:
  • GGGAUUUCAUGCUUAAAACAUUGUA and a second siRNA molecule comprises MSP2: GGCCGUACAUAUUCUAACAUAACUA.
  • composition comprises an siRNA cocktail, MST RS1 , wherein a first siRNA molecule comprises MRRl :
  • the composition comprises at least three different siRNA molecules that target one or more conserved regions of the genome of a MERS-CoV and a pharmaceutically acceptable carrier.
  • the pharmaceutically acceptable carrier comprises a polymeric nanoparticle or a liposomal nanoparticle.
  • composition comprises an siRNA cocktail, MSTP RS1 , wherein a first siRNA molecule comprises MPL1 :
  • CGCAAUACGUAAAGCUAAAGAUAU a second siRNA molecule comprises MRRl : CCCAGUGUUAUUGGUGUUUAUCAUA, and a third siRNA molecule comprises MSPl : GGCCGUACAUAUUCUAACAUAACUA.
  • composition comprises an siRNA cocktail, MST PRS2 , wherein a first siRNA molecule comprises MPL2:
  • a second siRNA molecule comprises MRR2: GGGAUUUCAUGCUUAAAACAUUGUA, and a third siRNA molecule comprises MSP2: GGCCGUACAUAUUCUAACAUAACUA.
  • the siRNA molecules comprise 25 mer blunt-end siRNA molecules and the carrier comprises a Histidine-Lysine copolymer or Spermine-Lipid Conjugate and cholesterol.
  • Pharmaceutically acceptable carriers include saline, sugars, polypeptides, polymers, lipids, creams, gels, micelle materials, and metal nanoparticles.
  • the carrier comprises at least one of the following: a glucose solution, a polycationic binding agent, a cationic lipid, a cationic micelle, a cationic polypeptide, a hydrophilic polymer grafted polymer, a non-natural cationic polymer, a cationic polyacetal, a hydrophilic polymer grafted polyacetal, a ligand functionalized cationic polymer, a ligand functionalized- hydrophilic polymer grafted polymer, and a ligand functionalized liposome.
  • the polymers comprise a biodegradable histidine-lysine polymer, a
  • biodegradable polyester such as poly(lactic acid) (PL A), poly(gly colic acid) (PGA), and poly(lactic-co-glycolic acid) (PLGA), a polyamidoamine (PAMAM) dendrimer, a cationic lipid, or a PEGylated PEL Cationic lipids include DOTAP, DOPE, DC-Chol/DOPE, DOTMA, and DOTMA/DOPE.
  • the carrier is a histidine-lysine copolymer that forms a nanoparticle with the siRNA molecule, wherein the diameter of the nanoparticle is about lOOnm to about 400 nm.
  • the carrier is a polymer.
  • the polymer comprises a histidine-lysine copolymer (HKP).
  • H histidine-lysine copolymer
  • the carrier is a liposome.
  • the liposome comprises a cationic lipid conjugated with cholesterol.
  • the cationic lipid comprises a spermine head and one or two oleyl alcoholic tails. Examples of such molecules are disclosed in Figure 8.
  • the liposome comprises Spermine-Liposome-Cholesterol conjugate (SLiC).
  • the invention also includes methods of using the siRNA molecules and
  • compositions containing them to prevent or treat MERS-CoV disease A therapeutically effective amount of the composition of the invention is administered to a subject.
  • the subject is a mammal such as a mouse, ferret, monkey, or human.
  • the mammal is a laboratory animal, such as a rodent.
  • the mammal is a non-human primate, such as a monkey.
  • the mammal is a human.
  • a "therapeutically effective amount" is an amount that prevents, reduces the severity of, or cures MERS disease. Such amounts are determinable by persons skilled in the art, given the teachings contained herein.
  • a therapeutically effective amount of the pharmaceutical composition administered to a human comprises about 1 mg of the siRNA molecules per kilogram of body weight of the human to about 5 mg of the siRNA molecules per kilogram of body weight of the human.
  • Routes of administration are also determinable by persons skilled in the art, given the teachings contained herein. Such routes include intranasal administration and airway instillation, such as through use of an airway nebulizer. Such routes also include intraperitoneal, intravenous, and subcutaneous administration.
  • PL PR0 RNA-dependent RNA polymerase
  • RdRp RNA-dependent RNA polymerase
  • S Spike(S) protein and some of other structure genes (such as M and N protein) and non- structure genes (such as nsp-2, nsp-10 and nsp-15) of MERS-CoV as the targets for an siRNA cocktail-mediated therapeutic approach.
  • the present invention provides siRNA molecules that target a conserved region of MERS-CoV, wherein the siRNA molecules inhibit expression of those genes of MERS-CoV.
  • the molecule comprises a double-stranded sequence of 17, 18, 19, 20, 21, 22, 23, 24 or 25 nucleotides in length.
  • the siRNA molecule has blunt ends, or has 3' overhangs of one or more nucleotides on both sides of the double-stranded region.
  • the siRNA cocktail of the invention contains two, three, four, or more sequences targeting those genes of MERS-CoV.
  • MERS-CoV is enveloped single-stranded positive sense RNA viruses with genomes of 30, 119 nt.
  • the genome structure of MERS-CoV is similar to other coronaviruses, with the 5' two-thirds of the genome encoding the non- structural proteins (NSPs) required for viral genome replication, the remaining 3' third of the genome encoding the structural genes that make up the virion (spike, envelope, membrane, and nucleocapsid proteins), and four accessory genes interspersed within the structural gene region ( Figure 1A).
  • NSPs non- structural proteins
  • Figure 1A At the 5' end of the genome there is a leader sequence (67nt), which is followed by an untranslated region (UTR).
  • RNA genome contains at least 10 predicted open reading frames (ORFs): ORFla, ORFlb, S, 3, 4a, 4b, 5, E, M and N with sixteen predicted nonstructural proteins being encoded by ORFla/b.
  • ORFs predicted open reading frames
  • ORF2 Open reading frames ORF2, -6, -7 and -8a are translated from subgenomic mRNAs predicted to encode the four canonical structural genes: a 180/90-kDa spike glycoprotein (S), a ⁇ 23-kDa membrane glycoprotein(M), a small envelope protein (E) and a ⁇ 50-kDa nucleocapsidprotein (N), respectively ( Figure 1B-C).
  • DPP4 dipeptidyl peptidase 4
  • endothelial cells kidney, lung, small intestine, spleen
  • enterocytes activated leukocytes
  • testes prostate and cells of the renal glomeruli and proximal tubules.
  • DPP4 recognition is mediated by the receptor- binding domain (RBD, amino acids E367-Y606).
  • RBD receptor- binding domain
  • coronavirus genome a positive sense, capped and polyadenylated RNA strand, is directly translated, resulting in the synthesis of coronavirus replicase gene-encoded NSPs.
  • Coronavirus NSPs are translated as two large polyproteins harboring proteolytic enzymes, namely papain-like and chym otrypsin-li ke proteinases that extensively process coronavirus polyproteins to liberate up to 16 NSPs (nsp 1 - 16). After entering into the cell the virus specially modulates the innate immune response, antigen presentation, mitogen-activated protein kinase ( Figure 2).
  • siRNA sequences including both 25-mer and 23-mer oligos.
  • Table I siRNA sequences, 25-mer blunt-end oligos and 23- mer sticky-end oligos, targeting various viral RNA
  • Table II siRNA sequences, 25 -mer blunt-end oligos and 23-mer sticky-end oligos, targeting various viral RNA, where the red labeled siRNAs are the most potent siRNA inhibitors and the gold labeled siRNAs are the second best siRNA inhibitors, based on the prediction of our specific algorithm.
  • Table III siRNA sequences, 25-mer blunt-end oligos and 23-mer sticky-end oligos.
  • siRNA oligos 25-mer blunt-end oligos and 23-mer sticky-end oligos, targeting various viral proteins and genes.
  • PL pro Papain like protein
  • MPL1-6 total 6 active siRNAs
  • RDRP RNA dependent RNA protease
  • MRRl-5 total 5 active siRNAs
  • Spike protein specific siRNA total 8 active siRNAs (MSP 1-8).
  • Example 4 Cell Culture Based Screening for Potent Anti-MERS CoV siRNA Oligos Firstly, to identify the most potent siRNA for silencing MERS-CoV genes in Vero cell culture experiments, we used psiCheck plasmid carrying MERS-CoV gene sequences.
  • psiCHECK-2 a dual luciferase reporter vector, psiCHECK-2, with gene fragments of Papain like viral protein (nsp5), Conoravirus endopeptidase C30 (nsp6), RNA synthesis protein (nsplO), RNA-dependent RNA polymerase (nspl2), and structure proteins S, E, M and N.
  • psiCHECK-2 Vectors are designed to provide a quantitative and rapid approach for initial optimization of RNA interference (RNAi). The vectors enable monitoring of changes in expression of a target gene fused to a reporter gene.
  • nsp5, nsp6, nsplO, nspl2 and structure proteins S, E, M and N were amplified by PCR with specific primers to those genes, and then cloned into the multiple cloning sites of psiCHECK-2 Vector.
  • Renilla Luciferase is used as a primary reporter gene, and the siRNA targeting genes located downstream of the Renilla translational stop codon.
  • Vero cells were seeded in 96-well plates and incubated for 12h.
  • the reporter plasmids (recombinant vectors) psi-nsp5, psi-nsp6, psi-nsplO, psi-nspl2, psi-S, psi-E, psi-M and psi-N, and siRNA candidates were co-transfected into Vero cells using Lipofectamine 2000 in the DMEM without FBS.
  • the blank psi vector is taken as a negative control.
  • Six hours post- transfection the media was replaced with the DMEM supplemented with 10% FBS.
  • siRNA candidates dramatically decreased luciferase activity which indicates that siRNA could greatly inhibit the expression of the target genes of MERS-CoV were selected for the assay of infection with MERS-CoV in vitro.
  • RNA interference RNA interference
  • RNA from the harvested cells was extracted, and 5 '-RACE assays were carried out with gene-specific primers for cDNA products of nsp5, nsp6, nsplO, nspl2 and structure proteins S, E, M and N.
  • the single siRNAs or siRNA combinations with high protection efficiency were selected for in vivo studies.
  • Example 5 HKP/siRNA nanoparticle and pulmonary delivery
  • FDCP siRNA nanoparticle formulations can be established by mixing together aqueous solutions of FDCP and siRNA in 4: 1 ratio by a molecular weight (N/P).
  • N/P molecular weight
  • a typical FDCP/siRNA formulation will provide nanoparticles in average size in 150 nm in diameter ( Figure 4A).
  • nanoparticles can be resuspended in aqueous solution, lyophilized into dry powder, and then resuspended in RNase free water (Figure 4B).
  • Figure 4B After oral-trachial administration of HKP/siRNA (red labeled) nanoparticles to the mouse respiratory track we were able to observe fluorescent siRNA in the upper (bronchi), and lower airway (alveoli) (Figure 4C).
  • Figure 4C We compared the efficacy of RNAi of cyclophiline B in the lung after oraltrachial deliveries of three different doses of siRNA with HKP, DOTAP and D5W .
  • HKP-mediated delivery demonstrated the efficient RNAi of the target gene at the 2C ⁇ g dose ( Figure 5).
  • Example 6 HKP/siRNA formulation for intraperitoneal delivery
  • Tamiflu ® effect (Figure 7). Due to the fact that both influenza and MERS infections occur in the human respiratory system, we are envisioning that the similar therapeutic approach, such as the HKP/siRNA therapeutics, can be applied for treatment of MERS since we observed the positive therapeutic benefit.
  • SLiC Liposome Preparation Regular methods were tried at first to prepare liposomes with newly synthesized SLiC molecules, such as thin film method, solvent injection and so on without much success.
  • Norbert Maurer et al reported a method of liposome preparation in which siRNA or oligonucleotide solution was slowly added under vortexing to the 50% ethanol solution (v/v) of liposome and ethanol was later removed by dialysis. The nanoparticles thus derived were small in size and homogeneous.
  • siRNA was directly wrapped by cationic lipids during formation of liposome, while in most other methods siRNA or nucleic acid molecules are loaded (or entrapped) into preformed liposome, such as Lipofectamine 2000.
  • Lipids dissolved in ethanol are in so-called metastable state in which liposomes are not very stable and tend to aggregate.
  • stable liposome solution could be made by simply diluting ethanol to the final concentration of 12.5% (v/v).
  • Liposomes were prepared by addition of lipids (cationic SLiC /cholesterol, 50:50, mol %) dissolved in ethanol to sterile dd-H 2 0. The ethanolic lipid solution needs to be added slowly under rapid mixing.
  • SLiC liposomes Slow addition of ethanol and rapid mixing were critical for the success in making SLiC liposomes, as the process allows formation of small and more homogeneous liposomes.
  • siRNAs are loaded during the process of liposome formulation and ethanol or other solvent is removed at end of manufacturing
  • our SLiC liposomes were formulated with remaining ethanol still in the solution so that liposomes were thought to be still in metastable state.
  • siRNA solution was mixed/loaded with liposome solution cationic groups, lipids will interact with anionic siRNA and condense to form core.
  • SLiC liposomes' metastable state helped or facilitated liposome structure transformation to entrap siRNA or nucleic acids more effectively. Because of the entrapment of siRNA, SLiC liposomes become more compact and homogeneous.
  • SLiC Liposome Physiochemical Characterization of SLiC Liposome.
  • assays to characterize the physicochemical properties of SLiC liposome, including particle size, surface potential, morphology study, siRNA loading efficiency and biological activity, etc.
  • the particle size and zeta-potentials of SLiC liposomes were measured with Nano ZS Zeta Sizer (Malvern Instruments, UK). Each new SLiC liposome was tested for particle size and zeta-potential when ethanol contents changed from 50% to 25% and to 12.5%. Data were derived from formulations of different ethanol contents.
  • SLiC liposomes were prepared at lmg/ml in concentration and loaded with siRNA (2: 1, w/w). Each of SLiC Liposomes was composed of cationic SLiC and cholesterol dissolved in ethanol at 12.5%, e.g. TM2 (12.5). The average particle sizes of three sequential measurements and the average zeta-potentials of three sequential measurements were illustrated in Table IV.
  • liposomes particle sizes became much smaller when they were loaded with siRNA at 2: 1 (w/w) resulting in particle sizes in the range of 110 to 190nm in diameter and much lower PDI values.
  • Conventional consideration of liposomal structure dictates that siRNA is loaded or interacted with cationic lipids through electrostatic forces and liposomes wraps siRNA to form spherical particles in shape in order to reduce surface tension. As the result, the liposomes particle sizes became much smaller after loaded with siRNA. Liposomes formulated with siRNA also have lower surface charge, which could be explained by neutralizing effect from loaded siRNA.
  • mice Human host-cell dipeptidyl peptidase 4 (hDPP4) has been shown to be the receptor of MERS-CoV.
  • mouse is not a suitable small-animal model for MERS-CoV as it has no receptor being recognized and bound by the virus.
  • the mice were sensitized to MERS-CoV infection by transduction with Adenoviral or Lentiviral vector expressing hDPP4 in the respiratory tract.
  • This mouse model was used to investigate the efficiency of the siRNA on inhibiting the MERS-CoV infection in vivo.
  • the siRNA combination candidate was delivered by encapsidated with HKP-SLiC nanoparticle system. We performed all mouse studies under Biosafety level-3 conditions.
  • mice All BALB/c mice were 18 weeks old and tested as specific pathogen-free at the beginning of this study.
  • 30 mice of Adenoviral vector group and 30 mice of Lentiviral vector group were transduced with Adenoviral and Lentiviral vector expressing hDPP4, respectively.
  • Another 20 mice were transduced with empty Adenoviral or Lentiviral vector as the control.
  • hDDP4 gene was cloned into the Ad5.
  • MLE 15 cells were transduced with Ad5-hDDP4 at an MOI of 20. The supernatant were collected at 48 h post-infection.
  • mice were transduced intranasally with 10 8 pfu of Ad5-hDDP4.
  • hDDP4 gene was cloned into the plasmid pWPXLd.
  • pWPXLd-hDPP4 along with packaging vector, psPAX2, and envelope vector, pMD2.G, was co-transfected into packaging cell line HEK 293 T using calcium phosphate method.
  • the constructed viral vector was harvested and purified, and transducted with CHO cells.
  • the lentivirus was harvested and concentrated.
  • the mice were transduced intranasally with lentivirus expressing hDPP4 at titers of 10 8 transducing units/ml (TU/ml).
  • the Adenoviral and Lentiviral vector groups were further divided into prophylactic, therapeutic and control subgroup with ten mice in each subgroup.
  • Ten mice from Ad5-hDDP4 or psPAX2-hDDP4 prophylactic subgroup were intranasally inoculated with siRNA combination encapsidated with HKP-SLiC nanoparticle system 24 h before inoculation. 24 h later, all eighty mice including transduced with empty vector were infected intravenously with 10 5 pfu of MERS-CoV.
  • the prophylactic, therapeutic and control subgroup were intranasally inoculated with siRNA or PBS at 0, 24, 48, 72 and 96 h postinfection.
  • mice All mice were weighed and the survivors of each subgroup were counted daily.
  • the nasal washes were collected at 1, 3, 5, 7, 9, and 14 day post-infection for the viral titration.
  • Two infected mice from each group were sacrificed at 3 and 5 day post-infection, respectively.
  • tissue samples were homogenized in DMEM, and clarified by centrifugation. Both tissue suspensions and nasal washes werelO-fold serially diluted. The dilutions were added to the Vero cells monolayers grown in 96-well plates. The cytopathic effects (CPEs) were observed on day 3 post-infection, and the TCID50 was calculated by the Reed-Muench method.
  • RNAs were extracted from the tissues and the one-step quantitative real-time PCR were performed with forward, reverse primers and TaqMan probe specific to the conserved region of nspl2 (RNA-dependent RNA polymerase) of MERS-CoV.
  • siRNAs In vivo administration of siRNAs. The in vivo experiments were conducted using 6-8 week old female mice. For inoculation, allantoic fluid containing the virus at a dose of 5 ⁇ 10 4 EID5o/mL was used. The infectious activity of the virus in allantoic fluid was determined in vivo by titration of lethality. Titers of the virus were calculated using the Reed and Muench method. Non-infected mice that were kept in the same conditions as the infected animals were used as a negative control. Virus was administered to the animals intranasally under a light ether anesthesia. Each group of animals contained 15 mice.
  • the intraperitoneal administration could be a viable alternative, especially in patients with severe influenza with low gas-exchange volume and/or those on mechanical lung ventilation. Since siRNAs of the same length show similar properties (charge,
  • siRNA cocktail demonstrated herein may provide significant value as a prophylactic/ therapeutic with broad anti-influenza strain coverage and this coverage may well extend to as yet unidentified Influenza strains that may emerge in the future.
  • the therapeutic benefit we observed during the study using siRNA approach against influenza viral infection has provided a good example to follow: the HKP/siRNA nanoparticle delivery through IP route or respiratory route, targeting the conservative regions of the critical viral gene sequences, and siRNA cocktail design, etc.
  • HKP-siRNA103/105 formulation was IP administrated (10 mg/kg/day), a prophylactic and therapeutic benefit greater than that observed with Ribavirin (75 mg/kg/day) in protecting mice from exposure to a 2xLD50 dose of the virus.
  • Ribavirin is manufactured by multiple companies in the United States: Copegus produced by Genentech (member of the Roche group), Rebetol by Merck Sharp & Dome, a subsidary of Merck & Co., Inc.
  • PAA and siRNA can be self-assembled into complexes with nano-sized diameters (150-300 nm) and cationic surface charge (+ 20 to 30 mV).
  • nano-sized diameters 150-300 nm
  • cationic surface charge (+ 20 to 30 mV.
  • PAA-siRNA89/103 formulation 10 mg/kg
  • a therapeutic antiviral activity was observed equivalent to that of Tamiflu (25 mg/kg).
  • MERS siRNA therapy prophylactic/therapeutic response against newly emergent strains of influenza virus.
  • a similar approach can be considered for a MERS siRNA therapy.
  • rhesus macaque has been developed as a model for MERS- CoV using intratracheal inoculation. Similar to human, the infected monkeys showed clinical signs of disease, virus replication, and histological lesions, indicating that rhesus macaque is a good model for evaluation of vaccine and antiviral strategies against MERS-CoV infection.
  • siRNA cocktail candidate will be encapsidated with HKP-SLiC nanoparticle system, and administered intratracheally. This monkey study should be carried out under Biosafety Level- 3 condition.
  • All rhesus monkeys should be 2-3 years old at the beginning of this study. At the beginning, all monkeys need to be tested negative for MERS-CoV. Twelve monkeys should be divided into three groups—prophylactic, protection, and control group with four animals in each group. Four monkeys of prophylactic group should be intratracheally inoculated with siRNA combination encapsidated in FD P-SLiC nanoparticle system using a nebulizer. 24 h later, all twelve monkeys should be intratracheally inoculated with 6.5 ⁇ 10 7 TCID50 of MERS-CoV in 1 mL. The prophylactic and protection groups should be continuously inoculated with siRNA combination at 0, 24, 48, 72 and 96 h post-infection using the nebulizer. The control group will be inoculated with PBS at the same time points.
  • the viral titers determination in the tissue and swab samples should be performed as described in Example 2.
  • the total RNA will be extracted from the tissues and the one-step
  • the total RNA will be extracted from the tissues and the one-step quantitative real-time PCR will be performed as described in Example 8.
  • MERS-CoV Middle East respiratory syndrome coronavirus
  • NSP16 GCUUUAUUCUUUACUUACCUGUGUA 1 times at 21040
  • NSP16 CCUGUGUAACCUCAUUAAUAAUAAU 1 times at 21057
  • NSP16

Abstract

The present invention relates to compositions and methods for siRNA therapeutics for prevention and treatment of Middle East Respiratory Syndrome Corona Virus (MERS-CoV) infections. The compositions include a pharmaceutical composition comprising siRNA cocktails that target viral genes and pharmaceutically acceptable polymeric nanoparticle carriers and liposomal nanoparticle carriers.

Description

s iRN A ANOPARTICLE FORMULATIONS FOR TREATMENT OF
MIDDLE-EAST RESPIRATORY SYNDROME C ORON AVIRAL INFECTION
CROSS-REFERENCE TO RELATED PATENT APPLICATIONS This application claims the benefit of and priority to U.S. Provisional Patent
Application No. 62/215,565, filed September 8, 2015, which is incorporated herein by reference in its entirety.
FIELD OF INVENTION
The present invention provides a pharmaceutical product composition of matter comprising siRNA sequences targeting genes or single-stranded viral RNAs of Middle-East Respiratory Syndrome Corona Virus (MERS-CoV), and nanoparticle carrier systems such as Histidine-Lysine co-polymers (HKP), or Spermine-Liposome conjugates (SLiC), or a lung tissue targeted moiety, such as a peptide, a nucleotide, a small molecule, and an antibody. The present invention also involves in methods of use for this pharmaceutical product, including formulations of siRNA/nanoparticle carrier, their process development and specific delivery routes and regimens. This invention presents a novel therapeutic agent for treatment of MERS-CoV infection.
BACKGROUND
MERS-CoV Virus Disease: Biology and Pathology
Middle East respiratory syndrome (MERS) is a highly lethal respiratory disease caused by a novel single-stranded, positive-sense RNA betacoronavirus, MERS-CoV. Dromedary camels, hosts for MERS-CoV, are implicated in direct or indirect transmission to human beings, although the exact mode of transmission is unknown. Recent studies support that camels serve as the primary source of the MERS-CoV infecting humans, while bats may be the ultimate reservoir of the virus. The virus was first isolated from a patient who died from a severe respiratory illness in June, 2012, in Jeddah, Saudi Arabia. As of May 31, 2015, 1180 laboratory-confirmed cases (483 deaths; 40% mortality) have been reported to WHO {Zumbla A. et al. 2015). The Centers for Disease Control and Prevention (CDC) has labelled it as a transmissible disease from human-to-humans. (Jalal S. 2015). Although most cases of MERS have occurred in Saudi Arabia and the United Arab Emirates, cases have been reported in Europe, the USA, and Asia in people who travelled from the Middle East or their contacts. Clinical features of MERS range from asymptomatic or mild disease to acute respiratory distress syndrome and multiorgan failure, resulting in death, especially in individuals with underlying comorbidities. No specific drug treatment exists for MERS and infection prevention, and control measures are crucial to prevent spread in health-care facilities {Zumbla A. Et al 2015). Clinical severity of the disease observed in humans may be explained the ability of MERS-CoV to replicate in the lower respiratory tract (de Wit E, et al. 2013) and is also related to MERS-CoV's ability to infect a broad range of cells with dipeptidyl peptidase 4 receptor (DPP4) expression, evade the host innate immune response, and induce cytokine dysregulation (Chan JF, 2015).
MERS-CoV is an enveloped single-stranded positive sense RNA virus with a genome of 30, 119 nt. The genome structure of MERS-CoV is similar to other coronaviruses, with the 5' two-thirds of the genome encoding the non- structural proteins (NSPs) required for viral genome replication, the remaining 3' third of the genome encoding the structural genes that make up the virion (spike, envelope, membrane, and nucleocapsid proteins), and four accessory genes interspersed within the structural gene region. At the 5' end of the genome, there is a leader sequence (67nt), which is followed by an untranslated region (UTR). At the 3' end of the RNA genome there is another UTR, followed by a poly (A) sequence of variable length. Transcription-regulatory sequences (TRS 5' AACGAA 3') are found at the 3' end of the leader sequence and at different positions upstream of genes in the genomic 3' -proximal domain of MERS-CoV. The MERS-CoV genome contains at least 10 predicted open reading frames (ORFs): ORFla, ORFlb, S, 3, 4a, 4b, 5, E, M and N with sixteen predicted nonstructural proteins being encoded by ORF 1 a/b . Several unique group-specific ORFs that are not essential for virus replication are encoded by MERS-CoV. The functions of these group-specific ORFs are unknown; however, by analogy to other coronaviruses, they may encode structural proteins or interferon antagonist genes (Totura AL, Baric RS, 2012). Open reading frames ORF2, -6, - 7 and -8a are translated from subgenomic mRNAs predicted to encode the four canonical structural genes: a 180/90-kDa spike glycoprotein (S), a ~ 23-kDa membrane glycoprotein (M), a small envelope protein (E) and a ~ 50-kDa nucleocapsidprotein (N), respectively (Abdel- Moneim AS. 2014).
Similar to other RNA viruses, coronavirus replicate in the host cytoplasm. The replication process is initiated by the viral particle after binding with specific cellular receptors, known as S-protein mediated binding. The receptor for MERS-CoV was recently identified as dipeptidyl peptidase 4 (DDP4, also known as CD26), a protein with diverse functions in glucose homeostasis, T-cell activation, neurotransmitter function, and modulation of cardiac signaling. DPP4 is expressed in a variety of cell types, including endothelial cells (kidney, lung, small intestine, spleen) hepatocytes, enterocytes, activated leukocytes, testes, prostate and cells of the renal glomeruli and proximal tubules. DPP4 recognition is mediated by the receptor- binding domain (RBD, amino acids E367- Y606) (PascalK, etal. 2015). Following virus entry, the coronavirus genome, a positive sense, capped and polyadeny!ated RNA strand, is directly translated, resulting in the synthesis of coronavirus replicase gene-encoded NSPs. Coronavirus NSPs are translated as two large polyproteins harboring proteolytic enzymes, namely papain- like and chymotrypsin-iike proteinases that extensively process coronavirus polyproteins to liberate up to 16 NSPs (nsp 1-16) (Lundin A. et al. 2014). After entering into the cell, the virus specially modulates the innate immune response, antigen presentation, and mitogen-activated protein kinase.
Current Prophylaxis and Therapeutics
Although the emergence of highly pathogenic MERS-CoV highlights an urgent need for potent therapeutic and prophylactic agents, no approved antiviral treatments for any human coronavirus infections are currently available. Supportive treatment with extracorporeal membrane oxygenation and dialysis is often required in patients with organ failure. Recently, tremendous efforts have been made in the search for an effective anti-MERS-CoV agent, and a number of antiviral agents have been identified. For example, some compounds with inhibitory activities in the low micromolar range on MERS-CoV replication in cell cultures have been identified from the libraries of FDA-approved drugs, de Wilde AH. and colleges identified four compounds (chloroquine, chlorpromazine, loperamide, and lopinavir) inhibiting MERS-CoV replication in the low-micromolar range (50% effective concentrations [EC(50)s], 3 to 8 LIM ) (de Wilde AH el al. 2014).
Antivirals with potent in vitro activities also include neutralizing monoclonal antibodies, antiviral peptides, interferons, mycophenolic acid. It was reported that rhesus macaques treated with a cocktail of IFN-a2b with ribavirin, a nucleoside analog, exhibited reduced MERS-CoV replication and an improved clinical outcome (Falzarano D, et al. 2013). Lu L. and colleges designed and synthesized a peptide (HR2P) derived from the HR2 domain in the S2 subunit of the spike (S) protein of the MERS-CoV EMC/2012 strain. They found that HR2P could bind with the HRl domain to form a stable six-helix bundle and thus inhibit viral fusion core formation and S protein- mediated cell-cell fusion. HR2P was demonstrated to potently inhibit infection by both pseudotyped and live MERS-CoV in different cell lines. After modification of the HR2P peptide by introducing Glu (E) and Lys (K) residues at the i to i+4 or i to i+3 arrangements, it was found that one of these HR2P analogous peptides, HR2P-M2, exhibited significantly improved stability, solubility and antiviral activity. HR2P-M2 peptide could potently inhibit infection by pseudoviruses expressing MERS-CoV S protein with or without mutation in the HR1 region, suggesting that it could be effective against most currently available MERS-CoV mutants. It was demonstrated that the HR2P-M2 peptide administered via the intranasal route could protect Ad5-hDPP4-transduced mice from challenge by MERS- CoV strains with or without mutations in the HR1 region, indicating that this peptide could be used as a nasal spray to protect high-risk populations, including healthcare workers, MERS patients' family members, and those having close contacts with the patients, from MERS-CoV infection. Intranasal application of the peptide to MERS-CoV-infected patients may suppress viral replication in epithelial cells of the respiratory tract and thus reduce the release of virions, thereby preventing the spreading of MERS-CoV to other people (Lu L. et al. 2015).
Another approach is passive administration of sera from convalescent human MERS patients or other animals to exposed or infected patients. The vast majority of camels in the Middle East have been infected with MERS-CoV, and some contain high titers of antibody to the virus. It was shown that this antibody is protective if delivered either prophylactically or therapeutically to mice infected with MERS-CoV, indicating that this may be a useful intervention in infected patients {Zhao J et al. 2015) .
In April 2014, three studies conducted by separate laboratories around the world reported the development of fully human neutralizing mAbs against MERS-CoV. All these mAbs target the RBD (receptor-binding domain) of the MERS-CoV SI glycoprotein and they were identified from non-immune human antibody libraries. Among these antibodies, three highly potent mAbs (m336, m337, m338) were identified from a very large phage-displayed antibody Fab library that was generated by using B cells from the blood of 40 healthy donors. This library was panned against recombinant MERS-CoV RBD to enrich for high affinity binders. The three identified mAbs, all derived from the VH gene 1-69, which has been the source of many other antiviral antibodies, exhibited exceptionally potent activity and neutralized pseudotyped MERS-CoV with 50% inhibitory concentration (IC50), ranging from 0.005 to 0.017 mg/ml. The most potent mAb, m336, inhibited >90% MERS-CoV pseudovirus infection (IC90) in DPP4- expressing Huh-7 cells at a concentration of 0.039 mg/ml. Similarly, m336 showed the most potent live MERS-CoV neutralizing activity in inhibiting the formation of MERS- CoV-induced CPE during live MERS-CoV infection of permissive Vero E6 cells, with an IC50 of 0.07 mg/ml.
In vivo studies have shown that this mAb is very effective in protecting MERS-CoV- susceptible animals from viral challenge (unpublished data), suggesting that the m336m mAb is a very promising drug candidate for the urgent treatment of MERS-CoV-infected patients (Tianlei Ying et al. 2015). Lu L. et colleges performed in vitro studies demonstrating that the combination of HR2P-M2 peptide with m336 mAb exhibited a strong synergistic effect against MERS-CoV infection (unpublished data). This observation suggests that intranasal administration of HR2P-M2 peptide combined with intravenous administration of m336 mAb may be a powerful strategy for treatment of MERS patients {Lu L. et al. 2015).
Jiang and colleges also identified two potent RBD-specific neutralizing mAbs, MERS-4 and MERS-27, by using a non-immune yeast-displayed scFv library to screen against the recombinant MERS-CoV RBD. The most potent mAb, MERS-4, neutralized the pseudotyped MERS-CoV infection in DPP4- expressing Huh-7 cells with an IC50 of 0.056 mg/ml and inhibited the formation of MERS-CoV-induced CPE during live MERS-CoV infection of permissive Vero E6 cells with an IC50 of 0.5 mg/ml. Tang et colleges identified neutralizing mAbs by using a non-immune phage-displayed scFv library. The panning was performed by sequentially using MERS-CoV spike-containing paramagnetic proteoliposomes and MERS- CoV S glycoprotein-expressing 293T cells as antigens. A panel of 7 anti-Si scFvs was identified and expressed in both scFv-Fc and IgGl formats, and their neutralizing activity against pseudotyped MERS-CoV in DPP4-expressing 293T cells, as well as live MERS-CoV infection in Vero cells, was measured. The most potent antibody, 3B11, neutralized live MERS-CoV in the plaque reduction neutralization tests with an IC50 of 1.83 mg/ml and 3.50 mg/ml in the scFv-Fc and IgG format, respectively {Tianlei Ying et al. 2015).
Fully Human Antibody and Humanized Mouse Model
Pascal K. and colleges used the Veloclmmune platform (a mouse that expresses human antibody-variable heavy chains and κ light chains) to generate a panel of fully human, noncompeting monoclonal antibodies that bind to MERS-CoV S protein and inhibit entry into target cells. It was showed that two of these antibodies (REGN3051 and REGN3048) can potently neutralize pseudoparticles generated with all clinical MERS-CoV S RBD variants isolated to date. Authors demonstrated that the fully human Veloclmmune antibodies neutralize infectious MERS-CoV significantly more efficient than published monoclonals isolated using traditional methods. They also developed a novel humanized model for MERS-CoV infection. They replaced the 79 kb of the mouse Dpp4 gene with 82 kb of its human ortholog. The resulting mice express fully human DPP4 under the control of the mouse regulatory elements, to preserve the proper expression regulation and protein tissue distribution and showed that these antibodies can prevent and treat MERS-CoV infection in vivo (Pascal KE et al. 2015). Coronaviruses
Coronaviruses are enveloped viruses and their positive strand RNA genome, the largest of all RNA viruses, encodes for as many as 16 non-structural proteins (NSPs), 4 major structural proteins, and up to 8 accessory proteins. Many of these proteins provide essential, frequently enzymatic, functions during the viral life cycle, such as coronaviais protease or RNA-dependent RNA polymerase (RdRp) activities. For example, the spike (S) protein mediates binding of different HCoVs to their specific cellular receptors, an event associated with preferential virus tropism for either ciliated or non-ciliated cells of the airway epithelium. The S protein also mediates fusion between lipids of the viral envelope and the host cell plasma membrane or membranes of endocytic vesicles to promote delivery of viral genomic RNA into the cytoplasm . Following virus entry, the coronavirus genome, a positive sense, capped and polyadenylated RNA strand, is directly translated, resulting in the synthesis of coronaviais replicase gene-encoded NSPs. Coronavirus NSPs are translated as two large polyproteins harboring proteolytic enzymes, namely papain-like and chymotrypsin-like proteinases that extensively process coronavirus polyproteins to liberate up to 16 NSPs (nsp 1-16), These proteolytic functions are considered essential for coronavirus replication. Likewise, the coronavirus RdRp activities, which reside in nsp8 and nsp 12, are considered essential for coronaviais replication. Coronaviruses encode an array of RNA -processing enzymes. These include a helicase activity linked to an NTPase activity in nspl3, a 3'-5'-exonuclease activity linked to a 'N7-methy!transf erase activity in nspl4, an endonuclease activity in nspl 5, and a 2'~ O-methyltransferase activity in nsp 16. Like all positive strand RNA viruses, coronaviruses synthesize viral RNA at organelle- like structures in order to compartmentalize this critical step of the viral life cycle to a specialized environment that is enriched in replicative viral and host-cell factors, and at the same time protected from antiviral host defense mechanisms. There is now a growing body of knowledge concerning the involvement, rearrangement and requirement of cellular membranes for RNA synthesis of a number of positive-stra d RNA viruses, including coronaviruses. Three coronaviral NSPs, i .e., nsp3, nsp4, and nsp6 are thought to participate in formation of these sites for viral RNA synthesis. In particular, these proteins contain multiple trans-membrane domains that are thougfvi to anchor the coronavirus replication complex through recruitment of intracellular membranes to form a reticuiovesicular network (RV ) of modified, frequently paired, membranes that includes convoluted membranes and double membrane vesicles (DVM) interconnected via the outer membrane with the rough ER.
Culture Systems MERS-CoV can replicate in different mammalian cell lines. In humans, it can replicate in the respiratory tract (lung adenocarcinoma cell line A549, embryonic fibroblast cell line HFL and polarized airway epithelium cell line Calu-3), kidney (embryonic kidney cell line; HEK), liver cells (hepatocellular carcinoma cell line; Huh-7), and the intestinal tract (colorectal adenocarcinoma cell line; Caco-2). MERS-CoV can also infect cell lines originating from primates, pigs, bats, civet cats and rabbits (Chan et al. 2013).
Additional Mouse Models
Zhao J and colleges described a novel approach to developing a mouse model for MERS by transducing mice with a recombinant, nonreplicating adenovirus expressing the hDPP4 receptor. After infection with MERS-CoV, mice develop an interstitial pneumonia. Similar to infected patients, Ad5-hDPP4-transduced mice with normal immune systems developed mild disease whereas immunocompromised mice, like patients with underlying diseases, were more profoundly affected. It was shown that these transduced, infected mice can be used to determine antivirus immune responses and to evaluate anti-MERS-CoV vaccines and therapies {Zhao J et al. 2014). Two Mouse Models have been developed Pascal K et al. In the first, a modified adenovirus expressing huDPP4 was administered intranasally to mice leading to huDPP4 expression in all cells of the lung, not just those that natively express DPP4. In this model, mice showed transient huDPP4 expression and mild lung disease. In the second model, a transgenic mouse was produced to expresses huDPP4 in all cells of the body, which in not physiologically relevant. In this model, MERS-CoV infection leads to high levels of viral RNA and inflammation in the lungs, and also significant inflammation and viral RNA in the brains of infected mice. However, no previous reports have documented tropism of MERS-CoV to the brains of an infected host, suggesting that studying pathogenesis of MERS-CoV in this model is limited.
RNAi and siRNA
RNA interference (RNAi) is a sequence-specific RNA degradation process that provides a direct way to knockdown, or silence, theoretically any gene. In naturally occurring RNA interference, a double stranded RNA is cleaved by an RNase Ill/helicase protein, Dicer, into small interfering RNA (siRNA) molecules, a dsRNA of 19-23 nucleotides (nt) with 2-nt overhangs at the 3' ends. These siRNAs are incorporated into a multicomponent-ribonuclease called RNA-induced-silencing-complex (RISC). One strand of siRNA remains associated with RISC, and guides the complex towards a cognate RNA that has sequence complementary to the guider ss-siRNA in RISC. This siRNA-directed endonuclease digests the RNA, thereby inactivating it. Studies have revealed that the use of chemically synthesized 21-25-nt siRNAs exhibit RNAi effects in mammalian cells, and the thermodynamic stability of siRNA hybridization (at terminals or in the middle) plays a central role in determining the molecule's function.
Importantly, it is presently not possible to predict with high degree of confidence which of many possible candidate siRNA sequences potentially targeting an mRNA sequence of a disease gene will, in fact, exhibit effective RNAi activity. Instead, individually specific candidate siRNA polynucleotide or oligonucleotide sequences must be generated and tested to determine whether the intended interference with expression of a targeted gene has occurred. Target Selection
MERS-CoV is enveloped single-stranded positive-sense RNA viruses, belonging to genus Betacoronavirus. The length of the genome is around 30k nt. The genome contains 10 predicted open reading frames (ORFs): ORFla, ORFlb, Spike (S) Protein, 3, 4a, 4b, 5,
Envelope (E) Protein, Membrane (M) Protein and Nucleocapsid (N) Protein, with 5' two third of the genome (ORFla, ORFlb) encoding 16 non-structure proteins (nspl-16), and rest 3' third of the genome encoding 4 structure proteins (S, E, M and N proteins).
The spike (S) protein of MERS-CoV is a glycoprotein with a molecular weight of -180/190 kDa, which is an important determinant of virus virulence and host range. Trimers of S protein form the spikes on the MERS-CoV envelope, which are responsible for the receptor binding and membrane fusion. Similar to the HIV envelope (env) and influenza hemagglutinin (HA), S proteins of MERS-CoV are Class I viral fusion proteins, which requires the protease cleavage between the SI and S2 domains to allow the conformational changes in S2, and initiate the virus entry and syncytia formation. Dipeptidyl peptidase 4
(DDP4, or CD26), a protein with diverse functions in glucose homeostasis, T-cell activation, etc., has been identified as the receptor of MERS-CoV on the host cells. The recognition of DPP4 is mediated by the receptor-binding domain (RBD, aa E367-Y606) of the S protein. DPP4 is expressed in a variety of cell types. It has been discovered on the human cell surface in the airways (such as the lungs) and kidneys recently.
After entry into the cell, two polyproteins, ppla and pplab of MERS-CoV express and undergo cotranslational proteolytic processing into the proteins that form the viral replication complex. During this processing, the activity of nsp-3, papain-like protease (PLpro) and nsp-5, 3C-like proteinase (3CLpro) are critical for the generation of 16 nonstructural proteins from the polyprotein. However, based on the MERS-CoV genome sequences analysis and calculation, we found several siRNA candidates (MPL1-6) match PLpro as the target, but no good candidate matches 3CLpro. Meanwhile, the recent studies showed that MERS-CoV PLpro also has the function to inhibit the innate immune response to viral infection by decreasing the levels of ubiquitinated and ISGylated host cell proteins and down-regulating the cytokines, such as CCL5 and IFN-β in stimulated cells.
MERS-CoV RNA-dependent RNA polymerase (RdRp), encoding by nsp-12, is the most important component of viral replication complex. This complex is responsible for both the transcription of the nested subgenomic mRNAs and the replication of the genomic positive-strand RNA. Both processes take place in the cytoplasm. In the viral mRNA transcription, the negative- strand RNAs generate from genomic RNA at first, and then transcribe a set of 3 '-coterminal nested subgenomic mRNAs by the replication complex, with a common 5' "leader" sequence (67nt) derived from the 5' end of the genome. The newly synthetic genomic RNAs are produced by the taking the negative- strand RNAs as the template.
BRIEF DESCRIPTION OF THE FIGURES
Figure 1. The genome structure of MERS-CoV MERS-CoV is enveloped single-stranded positive-sense RNA viruses, belonging to genus Betacoronavirus, with a genome of ~30K nt. The genome contains 10 predicted open reading frames (ORFs): ORFla, ORFlb, Spike (S) Protein, 3, 4a, 4b, 5, Envelope (E) Protein, Membrane (M) Protein and Nucleocapsid (N) Protein with 16 predicted nonstructural proteins being encoded by ORFla/b.
Figure 2. The life cycle of MERS. After binding to the receptor, viral RNA and proteins of MERS-CoV are synthesized entirely in the cytoplasm. Two polyproteins, ppla and pplab undergo cotranslational proteolytic processing into the proteins that form the viral replication complex. This complex is used to produce the negative-strand RNA from genomic RNA, and transcribe a 3 '-coterminal set of nested subgenomic mRNAs from the negative- strand RNA, which have a common 5' "leader" sequence derived from the 5' end of the genome. This viral replication complex is also used to produce the positive-strand genomic RNA taking the negative-strand RNA as the template.
Figure 3. Special design of siRNA sequences targeting critical viral genes: Papain like protein (PLpro) specific siRNA, total 6 active siRNAs (MPL1-6); RNA dependent RNA protease (RDRP) specific siRNA, total 5 active siRNAs (MRRl-5) and Spike protein specific siRNA, total 8 active siRNAs (MSP 1-8).
Figure 4. Histidine-Lysine co-polymer enhances topical and subcutaneous siRNA deliveries in vivo. The self-assembled HKP/siRNA nanoparticles (average 150nm in diameter) can be dissolved in aqueous solution, can be lyophilized into dry powder, and can be redissovled and mixed with methyl cellulose, or with RNAse free water. HKP/siRNA nanoparticle delivery to mouse respiratory track: upper airway, bronchi, alveoli.
Figure 5. Comparison of target knockdown of lung endogenous gene among HKP, DOTAP and D5W after oral tracheal deliveries of siRNA with three different dosing regimens. HKP demonstrated the efficient siRNA-mediated knockdown of the target gene at the 20μg dose.
Figure 6. Intraperitoneal delivery of HKP-siRNA nanoparticle formulation demonstrated a prophylactic effect against H1N1 in the viral challenged mice (n =10). The evidence of the anti-influenza efficacy achieved by HKP-siRNA respiratory delivery support our notion that the similar approach can also be applied for anti-MERS siRNA therapeutics. The HKP- siRNA combination (siRNA103-siRNA105 with a 1 : 1 ratio) at a concentration of 40μg/2ml was intraperitoneally administrated on day 1, 2, 3, 4 and 5 (2.5 mg/kg/day, purple arrows). The viral challenges through intranasal administrations of 2x LD50 H1N1 (A/Puerto
Rico/8/1934) were conducted on day 2 (red arrow) for the virus only, Ribavirin and siRNA treatment groups. Ribavirin as a positive control was administered through gavages of 200ul to provide 75mg/kg/day dosing over days 1-5 (orange arrows). The prophylactic efficacy of HKP-siRNA formulation is clearly better than that of Ribavirin.
Figure 7. Intraperitoneal delivery of PAA-siRNA formulation demonstrated a therapeutic efficacy against H1N1 in the viral challenged mice (n = 15). The viral challenges through intranasal administrations of lx LD50 H1N1 (A/California/04/2009) were conducted on day 1 (red arrow) for the virus only, Tamiflu ® and siRNA treatment groups. The H1N1 challenged mice were treated with various dosages of PAA-siRNA combination (siRNA89- siRNA103 with a 1 : 1 ratio), 1 mg/kg, 5 mg/kg and 10 mg/kg, through intraperitoneal administration daily, from day 2 to day 6 (black arrows). Adapting the same route and dosing regimen, 25 mg/kg Tamiflu ® was also administrated daily on the HlNl infected mice. The therapeutic efficacy of 10 mg/kg/day of PAA-siRNA combination resulted in almost equal anti-influenza activity to that of 25 mg/kg/day of Tamiflu ® treatment.
Figure 8. Scheme of the Basic Synthesis Routes and Structure of Spermine-Liposome Conjugates (SLiC) A. The synthesis route for each of the five molecules are listed with the specific liposome chain, such as, Ri, R2, R3, R4 and R5, conjugated at the location of RiH, R2H, R3H, R4H and R5H respectively. B. The structures of the five SLiC species are illustrated with a spermine head and two lipid legs.
Figure 9. Target Gene Silencing by SLiC Liposome-Mediated siRNA Delivery In Vivo.
TM4-packaged siRNA specific to cyclophilin-B was selected for being tested in a Balb/c mouse model through a respiratory route of delivery. In addition to Blank control and empty TM4 control, a HKP package cyclophilin-B siRNA was used as a positive control. Three different dosage: 25, 40 and 50 μg were tested. Both 40 and 50 μg siRNA dosages achieved significant target gene silencing (N=3, *P<0.05).
Figure 10. Evaluation of the cytokine response in the mouse lung after HKP-siRNA nanoparticles delivery. HKP-siRNA at different dosages were oraltracheally administrated in the mouse lungs. The total lung tissue were harvested for protein isolation and cytokine measurements by ELISA assay.
Figure 11. A. Standard curve to measure protein concentration was prepared according to in- house SOP (Lowry Method); B. Total protein concentration was determined in each sample. Figure 12. A. Standard curve to measure TNF-a concentration was prepared according to in- house SOP (Lowry Method); B. TNF-a concentration in each sample was determined and normalized to total protein.
Figure 13. A. Standard curve to measure IL-6 concentration was prepared according to in- house SOP (Lowry Method); B. IL-6 concentration in each sample was determined and normalized to total protein.
Figure 14. A. Standard curve to measure IFN-a concentration was prepared according to in- house SOP (Lowry Method); B. IFN-a concentration in each sample was determined and normalized to total protein. Figure 15. The HKP siRNA nanoparticle aqueous solution and SLiC siRNA nanoparticle aqueous solution will be administrated through airway, using an ultrasound nebulizer generated aerosol which will have water solution particle size with broad spectrum allowing whole lung distribution.
DESCRIPTION OF THE INVENTION The present invention provides siRNA molecules that inhibit MERS-CoV gene expression, compositions containing the molecules, and methods of using the molecules and compositions to prevent or treat MERS in a subject, such as a human patient.
SiRNA Molecules
As used herein, an "siRNA molecule" or an "siRNA duplex" is a duplex
oligonucleotide, that is a short, double-stranded polynucleotide, that interferes with the expression of a gene in a cell, after the molecule is introduced into the cell, or interferes with the expression of a viral gene. For example, it targets and binds to a complementary nucleotide sequence in a single stranded (ss) target RNA molecule. SiRNA molecules are chemically synthesized or otherwise constructed by techniques known to those skilled in the art. Such techniques are described in U.S. Pat. Nos. 5, 898,031, 6, 107,094, 6,506,559,
7,056,704 and in European Pat. Nos. 1214945 and 1230375, which are incorporated herein by reference in their entireties. By convention in the field, when an siRNA molecule is identified by a particular nucleotide sequence, the sequence refers to the sense strand of the duplex molecule. One or more of the ribonucleotides comprising the molecule can be chemically modified by techniques known in the art. In addition to being modified at the level of one or more of its individual nucleotides, the backbone of the oligonucleotide can be modified. Additional modifications include the use of small molecules (e.g. sugar molecules), amino acids, peptides, cholesterol, and other large molecules for conjugation onto the siRNA molecule. The siRNA molecules of the invention target a conserved region of the genome of a MERS-CoV. As used herein, "target" or "targets" means that the molecule binds to a complementary nucleotide sequence in a MERS-CoV gene, which is an RNA molecule, or it binds to mRNA produced by the gene. This inhibits or silences the expression of the viral gene and/or its replication. As used herein, a "conserved region" of a MERS-CoV gene is a nucleotide sequence that is found in more than one strain of the virus, is identical among the strains, rarely mutates, and is critical for viral infection and/or replication and/or release from the infected cell.
In one embodiment, the siRNA molecule is a double-stranded oligonucleotide with a length of about 17 to about 27 base pairs. In one aspect of this embodiment, the molecule is a double-stranded oligonucleotide with a length of 19 to 25 base pairs. In another aspect of this embodiment, the molecule is a couple- stranded oligonucleotide with a length of 19 to 25 base pairs. In still another aspect of this embodiment, it is a double-stranded oligonucleotide with a length of 25 base pairs. In all of these aspects, the molecule may have blunt ends at both ends, or sticky ends with overhangs at both ends (unpaired bases extending beyond the main strand), or a blunt end at one end and a sticky end at the other. In one particular aspect, it has blunt ends at both ends. In another particular aspect, the molecule has a length of 25 base pairs (25 mer) and has blunt ends at both ends.
In one embodiment, the conserved MERS-CoV genomic regions are the gene sequences coding for the MERS-CoV proteins Papain-like protease (PLpro), RNA-dependent RNA polymerase (RdRp), and Spike protein. The genomic locations of such genes are shown in Figure 3. In one embodiment, the siRNA molecule targets PLpro virus gene expression. In another embodiment, the siRNA molecule targets RdRp viral gene expression. In still another embodiment, the siRNA molecule targets Spike viral gene expression.
Particular siRNA sequences that represent some of the siRNA molecules of the invention are disclosed in Tables 1-3. In one embodiment, the siRNA molecules are disclosed in Table 3. In one particular embodiment, the siRNA molecules are the following:
MPL1 CGCAAUACGUAAAGCUAAAGAUUAU,
MPL2 GGGUGUUGAUUAUACUAAGAAGUUU,
MPL3 CGCAUAAUGGUGGUUACAAUUCUU,
MPL4 GGCUUCAUUUUAUUUCAAAGAAUUU, MPL5: GCGCUUUUACAAAUCUAGAUAAGUU,
MPL6: CGCAUUGCAUGCCGUAAGUGUAAUU,
MRR1 : CCCAGUGUUAUUGGUGUUUAUCAUA,
MRR2: GGGAUUUCAUGCUUAAAACAUUGUA,
MRR3 : GGGUGCUAAUGGCAACAAGAUUGUU,
MRR4: CCCCAAAUUUGUUGAUAAAUACUAU,
MRR5: CGGUUGCUUUGUAGAUGAUAUCGUU,
MSP1 : GGCCGUACAUAUUCUAACAUAACUA,
MSP2: GGCCGUACAUAUUCUAACAUAACUA,
MSP3 : CCGAAGAUGAGAUUUUAGAGUGGUU,
MSP4: CCCAGUUUAAUUAUAAACAGUCCUU,
MSP5: GGCUUCACUACAACUAAUGAAGCUU,
MSP6: CCCCUGUUAAUGGCUACUUUAUUAA,
MSP7: CCCUGUUAAUGGCUACUUUAUUAAA, and
MSP8: GCCGCAUAAGGUUCAUGUUCACUAA.
The siRNA molecules of the invention also include ones derived from those listed in Tables 1-3 and otherwise herein. The derived molecules can have less than the 25 base pairs shown for each molecule, down to 17 base pairs, so long as the "core" contiguous base pairs remain. That is, once given the specific sequences shown herein, a person skilled in the art can synthesize molecules that, in effect, "remove" one or more base pairs from either or both ends in any order, leaving the remaining contiguous base pairs, creating shorter molecules that are 24, 23, 22, 21, 20, 19, 18, or 17 base pairs in length, if starting with the 25 base pair molecule. For example, the derived molecules of the 25 mer molecules disclosed in Tables 1-3 include: a) 24 contiguous base pairs of any one or more of the molecules; b) 23 contiguous base pairs of any one or more of the molecules; c) 22 contiguous base pairs of any one or more of the molecules; b) 21 contiguous base pairs of any one or more of the molecules; d) 20 contiguous base pairs of any one or more of the molecules; e) 19 contiguous base pairs of any one or more of the molecules; f) 18 contiguous base pairs of any one or more of the molecules; and g) 17 contiguous base pairs of any one or more of the molecules. It is not expected that molecules shorter than 17 base pairs would have sufficient activity or sufficiently low off-target effects to be pharmaceutically useful; however, if any such constructs did, they would be equivalents within the scope of this invention.
Alternatively, the derived molecules can have more than the 25 base pairs shown for each molecule, so long as the initial 25 contiguous base pairs remain. That is, once given the specific sequences disclosed herein, a person skilled in the art can synthesize molecules that, in effect, "add" one or more base pairs to either or both ends in any order, creating molecules that are 26 or more base pairs in length and containing the original 25 contiguous base pairs.
The siRNA molecule may further comprise an immune stimulatory motif. Such motifs can include specific RNA sequences such as 5'-UGUGU-3' (Judge et al., Nature
Biotechnology 23, 457-462 (1 April 2005)), 5'-GUCCUUCAA-3' (Hornung et al., Nat. Med. 11,263-270(2005). See Kim et al., Mol Cell 24; 247-254 (2007). These articles are incorporated herein by reference in their entireties. These are siRNA sequences that specifically activate immune responses through Toll-like receptor (TLR) activation or through activation of key genes such as RIG-I or PKR. In one embodiment, the motif induces a TH1 pathway immune response. In another embodiment, the motif comprises 5'- UGUGU-3', 5'-GUCCUUCAA-3', 5'-GGGxGG-3' (where x is A, T, G and C), or CpG motifs 5'-GTCGTT-3'.
Pharmaceutical Compositions The invention includes a pharmaceutical composition comprising an siRNA molecule that targets a conserved region of the genome of a MERS-CoV and a pharmaceutically acceptable carrier. In one embodiment, the carrier condenses the molecules to form a nanoparticle. Alternatively, the composition may be formulated into nanoparticles. The compositions may be lyophilized into a dry powder. In one particular embodiment, the pharmaceutically acceptable carrier comprises a polymeric nanoparticle or a liposomal nanoparticle.
In one embodiment, the composition comprises at least two different siRNA molecules that target one or more conserved regions of the genome of a MERS-CoV and a pharmaceutically acceptable carrier. In one aspect of this embodiment, the gene sequences in the conserved regions of the MERS-CoV are critical for the viral infection of a mammal. In one aspect of this embodiment, mammal is a human, mouse, ferret, or monkey. The composition can include one or more additional siRNA molecules that target still other conserved regions of the MERS-CoV genome. In one aspect of this embodiment, a pharmaceutically acceptable carrier comprises a polymeric nanoparticle or a liposomal nanoparticle. In one embodiment, the targeted conserved regions of the genome comprise gene sequences coding for the following MERS-CoV proteins: Papain-like protease (PLpro), RNA- dependent RNA polymerase (RdRp), and Spike protein. In one aspect of this embodiment, the siRNA molecules target PLpro viral gene expression. Such siRNA molecules include the following: MPL 1 : CGC AAUACGUAAAGCU AAAGAUUAU,
MPL2: GGGUGUUGAUUAUACUAAGAAGUUU,
MPL3 : CGCAUAAUGGUGGUUACAAUUCUU,
MPL4: GGCUUCAUUUUAUUUCAAAGAAUUU,
MPL5: GCGCUUUUACAAAUCUAGAUAAGUU, and
MPL6 : CGC AUUGC AUGCCGU AAGUGUAAUU.
In another aspect of this embodiment, the siRNA molecules target RdRp viral gene expression. Such siRNA molecules include the following:
MRR1 : CCCAGUGUUAUUGGUGUUUAUCAUA,
MRR2: GGGAUUUCAUGCUUAAAACAUUGUA,
MRR3 : GGGUGCUAAUGGC AAC AAGAUUGUU,
MRR4: CCCCAAAUUUGUUGAUAAAUACUAU, and
MRR5: CGGUUGCUUUGUAGAUGAUAUCGUU.
In still another aspect of this embodiment, the siRNA molecules target Spike viral gene expression. Such siRNA molecules include the following: MSP 1 : GGCCGUAC AUAUUCUAAC AUAACUA,
MSP2: GGCCGUAC AUAUUCUAAC AUAACUA,
MSP3 : CCGAAGAUGAGAUUUUAGAGUGGUU,
MSP4: CCCAGUUUAAUUAUAAACAGUCCUU, MSP5: GGCUUCACUACAACUAAUGAAGCUU,
MSP6: CCCCUGUUAAUGGCUACUUUAUUAA,
MSP7: CCCUGUUAAUGGCUACUUUAUUAAA, and
MSP8: GCCGCAUAAGGUUCAUGUUCACUAA.
In a further aspect of this embodiment, the siRNA molecules are two or more of the following:
MPL1 : CGCAAUACGUAAAGCUAAAGAUUAU,
MPL2: GGGUGUUGAUUAUACUAAGAAGUUU,
MPL3 : CGCAUAAUGGUGGUUACAAUUCUU,
MPL4: GGCUUCAUUUUAUUUCAAAGAAUUU,
MPL5: GCGCUUUUACAAAUCUAGAUAAGUU,
MPL6: CGCAUUGCAUGCCGUAAGUGUAAUU,
MRR1 : CCCAGUGUUAUUGGUGUUUAUCAUA,
MRR2: GGGAUUUCAUGCUUAAAACAUUGUA,
MRR3 : GGGUGCUAAUGGC AAC AAGAUUGUU,
MRR4: CCCCAAAUUUGUUGAUAAAUACUAU,
MRR5: CGGUUGCUUUGUAGAUGAUAUCGUU,
MSP1 : GGCCGUACAUAUUCUAACAUAACUA,
MSP2: GGCCGUACAUAUUCUAACAUAACUA,
MSP3 : CCGAAGAUGAGAUUUUAGAGUGGUU,
MSP4: CCCAGUUUAAUUAUAAACAGUCCUU,
MSP5: GGCUUCACUACAACUAAUGAAGCUU,
MSP6: CCCCUGUUAAUGGCUACUUUAUUAA,
MSP7: CCCUGUUAAUGGCUACUUUAUUAAA, and
MSP8: GCCGCAUAAGGUUCAUGUUCACUAA.
In another embodiment, the composition comprises an siRNA cocktail, MSTPR1, wherein a first siRNA molecule comprises MPL1 : CGCAAUACGUAAAGCUAAAGAUUAU and a second siRNA molecule comprises MRR1 : CCCAGUGUUAUUGGUGUUUAUCAUA.
In another embodiment, the composition comprises an siRNA cocktail, MSTPR2, wherein a first siRNA molecule comprises MPL2:
GGGGUUGAUUAUACUAAGAAGUUU and a second siRNA molecule comprises MRR2: GGGAUUUCAUGCUUAAAACAUUGUA.
In another embodiment, the composition comprises an siRNA cocktail, MSTRS2, wherein a first siRNA molecule comprises MRR2:
GGGAUUUCAUGCUUAAAACAUUGUA and a second siRNA molecule comprises MSP2: GGCCGUACAUAUUCUAACAUAACUA.
In another embodiment, the composition comprises an siRNA cocktail, MSTRS1, wherein a first siRNA molecule comprises MRRl :
CCCAGUGUUAUUGGUGUUUAUCAUA and a second siRNA molecule comprises MSPl : GGCCGUACAUAUUCUAACAUAACUA. In another embodiment, the composition comprises at least three different siRNA molecules that target one or more conserved regions of the genome of a MERS-CoV and a pharmaceutically acceptable carrier. In one aspect of this embodiment, the pharmaceutically acceptable carrier comprises a polymeric nanoparticle or a liposomal nanoparticle.
In another embodiment, the composition comprises an siRNA cocktail, MSTPRS1, wherein a first siRNA molecule comprises MPL1 :
CGCAAUACGUAAAGCUAAAGAUAU, a second siRNA molecule comprises MRRl : CCCAGUGUUAUUGGUGUUUAUCAUA, and a third siRNA molecule comprises MSPl : GGCCGUACAUAUUCUAACAUAACUA.
In another embodiment, the composition comprises an siRNA cocktail, MSTPRS2, wherein a first siRNA molecule comprises MPL2:
GGGUGUUGAUUAUACUAAGAAGUUU a second siRNA molecule comprises MRR2: GGGAUUUCAUGCUUAAAACAUUGUA, and a third siRNA molecule comprises MSP2: GGCCGUACAUAUUCUAACAUAACUA.
In one aspect of all of these embodiments, the siRNA molecules comprise 25 mer blunt-end siRNA molecules and the carrier comprises a Histidine-Lysine copolymer or Spermine-Lipid Conjugate and cholesterol. Pharmaceutically Acceptable Carriers
Pharmaceutically acceptable carriers include saline, sugars, polypeptides, polymers, lipids, creams, gels, micelle materials, and metal nanoparticles. In one embodiment, the carrier comprises at least one of the following: a glucose solution, a polycationic binding agent, a cationic lipid, a cationic micelle, a cationic polypeptide, a hydrophilic polymer grafted polymer, a non-natural cationic polymer, a cationic polyacetal, a hydrophilic polymer grafted polyacetal, a ligand functionalized cationic polymer, a ligand functionalized- hydrophilic polymer grafted polymer, and a ligand functionalized liposome. In another embodiment, the polymers comprise a biodegradable histidine-lysine polymer, a
biodegradable polyester, such as poly(lactic acid) (PL A), poly(gly colic acid) (PGA), and poly(lactic-co-glycolic acid) (PLGA), a polyamidoamine (PAMAM) dendrimer, a cationic lipid, or a PEGylated PEL Cationic lipids include DOTAP, DOPE, DC-Chol/DOPE, DOTMA, and DOTMA/DOPE. In still another embodiment, the carrier is a histidine-lysine copolymer that forms a nanoparticle with the siRNA molecule, wherein the diameter of the nanoparticle is about lOOnm to about 400 nm.
In one embodiment, the carrier is a polymer. In one aspect of this embodiment, the polymer comprises a histidine-lysine copolymer (HKP). Such copolymers are described in U.S. Pat. Nos. 7,070,807 B2, 7,163,695 B2, and 7,772,201 B2, which are incorporated herein by reference in their entireties. In one aspect of this embodiment, the HKP comprises the structure (R)K(R)-K(R)-(R)K(X), where R =KHHHKHHHKHHHKHHHK, K = lysine, and H = histidine.
In another embodiment, the carrier is a liposome. In one aspect of this embodiment, the liposome comprises a cationic lipid conjugated with cholesterol. In a further aspect, the cationic lipid comprises a spermine head and one or two oleyl alcoholic tails. Examples of such molecules are disclosed in Figure 8. In a further aspect, the liposome comprises Spermine-Liposome-Cholesterol conjugate (SLiC).
Methods of Use
The invention also includes methods of using the siRNA molecules and
pharmaceutical compositions containing them to prevent or treat MERS-CoV disease. A therapeutically effective amount of the composition of the invention is administered to a subject. In one embodiment, the subject is a mammal such as a mouse, ferret, monkey, or human. In one aspect of this embodiment, the mammal is a laboratory animal, such as a rodent. In another aspect of this embodiment, the mammal is a non-human primate, such as a monkey. In still another aspect of this embodiment, the mammal is a human. As used herein, a "therapeutically effective amount" is an amount that prevents, reduces the severity of, or cures MERS disease. Such amounts are determinable by persons skilled in the art, given the teachings contained herein. In one embodiment, a therapeutically effective amount of the pharmaceutical composition administered to a human comprises about 1 mg of the siRNA molecules per kilogram of body weight of the human to about 5 mg of the siRNA molecules per kilogram of body weight of the human. Routes of administration are also determinable by persons skilled in the art, given the teachings contained herein. Such routes include intranasal administration and airway instillation, such as through use of an airway nebulizer. Such routes also include intraperitoneal, intravenous, and subcutaneous administration.
EXAMPLES
We selected Papain-like protease (PLPR0), RNA-dependent RNA polymerase (RdRp), Spike(S) protein and some of other structure genes (such as M and N protein) and non- structure genes (such as nsp-2, nsp-10 and nsp-15) of MERS-CoV as the targets for an siRNA cocktail-mediated therapeutic approach. The present invention provides siRNA molecules that target a conserved region of MERS-CoV, wherein the siRNA molecules inhibit expression of those genes of MERS-CoV. In a preferred embodiment, the molecule comprises a double-stranded sequence of 17, 18, 19, 20, 21, 22, 23, 24 or 25 nucleotides in length. In one aspect of this embodiment, the siRNA molecule has blunt ends, or has 3' overhangs of one or more nucleotides on both sides of the double-stranded region. The siRNA cocktail of the invention contains two, three, four, or more sequences targeting those genes of MERS-CoV. Example 1. MERS-CoV Viral Structure and Protein Function
MERS-CoV is enveloped single-stranded positive sense RNA viruses with genomes of 30, 119 nt. The genome structure of MERS-CoV is similar to other coronaviruses, with the 5' two-thirds of the genome encoding the non- structural proteins (NSPs) required for viral genome replication, the remaining 3' third of the genome encoding the structural genes that make up the virion (spike, envelope, membrane, and nucleocapsid proteins), and four accessory genes interspersed within the structural gene region (Figure 1A). At the 5' end of the genome there is a leader sequence (67nt), which is followed by an untranslated region (UTR). At the 3' end of the RNA genome there is another UTR, followed by a poly(A) sequence of variable length. Transcription-regulatory sequences (TRS 5' AACGAA 3' ) are found at the 3' end of the leader sequence and at different positions upstream of genes in the genomic 3' -proximal domain of MERS-CoV. The MERS-CoV genome contains at least 10 predicted open reading frames (ORFs): ORFla, ORFlb, S, 3, 4a, 4b, 5, E, M and N with sixteen predicted nonstructural proteins being encoded by ORFla/b. Several unique group-specific ORFs that are not essential for virus replication are encoded by MERS-CoV. The functions of these group-specific ORFs are unknown; however, by analogy to other coronaviruses, they may encode structural proteins or interferon antagonist genes. Open reading frames ORF2, -6, -7 and -8a are translated from subgenomic mRNAs predicted to encode the four canonical structural genes: a 180/90-kDa spike glycoprotein (S), a ~ 23-kDa membrane glycoprotein(M), a small envelope protein (E) and a ~ 50-kDa nucleocapsidprotein (N), respectively (Figure 1B-C).
Example 2. MERS-CoV Viral Genes and RNAs
Similar to other RNA viruses, coronavirus replicate in the host cytoplasm. The replication process is initiated by the viral particle after binding with specific cellular receptors, known as S-protein mediated binding. The receptor for MERS-CoV was recently identified as dipeptidyl peptidase 4 (DDP4, also known as CD26), a protein with diverse functions in glucose homeostasis, T-cell activation, neurotransmitter function, and modulation of cardiac signaling. DPP4 is expressed in a variety of cell types, including endothelial cells (kidney, lung, small intestine, spleen) hepatocytes, enterocytes, activated leukocytes, testes, prostate and cells of the renal glomeruli and proximal tubules. DPP4 recognition is mediated by the receptor- binding domain (RBD, amino acids E367-Y606). Following virus entry, the coronavirus genome, a positive sense, capped and polyadenylated RNA strand, is directly translated, resulting in the synthesis of coronavirus replicase gene-encoded NSPs. Coronavirus NSPs are translated as two large polyproteins harboring proteolytic enzymes, namely papain-like and chym otrypsin-li ke proteinases that extensively process coronavirus polyproteins to liberate up to 16 NSPs (nsp 1 - 16). After entering into the cell the virus specially modulates the innate immune response, antigen presentation, mitogen-activated protein kinase (Figure 2).
Example 3. Design siRNA Targeting Key Genes of MERS-CoV
Using our specific algorithm, we have designed multiple siRNA sequences, including both 25-mer and 23-mer oligos. Table I. siRNA sequences, 25-mer blunt-end oligos and 23- mer sticky-end oligos, targeting various viral RNA Table II. siRNA sequences, 25 -mer blunt-end oligos and 23-mer sticky-end oligos, targeting various viral RNA, where the red labeled siRNAs are the most potent siRNA inhibitors and the gold labeled siRNAs are the second best siRNA inhibitors, based on the prediction of our specific algorithm. Table III. We selected the most potent siRNA oligos, 25-mer blunt-end oligos and 23-mer sticky-end oligos, targeting various viral proteins and genes. As demonstrated in the Figure 3, we are specifically targeting critical viral genes: Papain like protein (PLpro) specific siRNA, total 6 active siRNAs (MPL1-6); RNA dependent RNA protease (RDRP) specific siRNA, total 5 active siRNAs (MRRl-5) and Spike protein specific siRNA, total 8 active siRNAs (MSP 1-8).
Example 4. Cell Culture Based Screening for Potent Anti-MERS CoV siRNA Oligos Firstly, to identify the most potent siRNA for silencing MERS-CoV genes in Vero cell culture experiments, we used psiCheck plasmid carrying MERS-CoV gene sequences.
Secondly, we used Vero cell infected with real MERS-CoV to test the selected siRNA for their anti- MERS CoV infecting activity.
A. Subc lotting MERS-CoV virus gene fragments as surrogates for siRNA potency
examination in Vero cells In order to investigate the degrading effect of siRNA candidates on targeted MERS-CoV genes, we used a dual luciferase reporter vector, psiCHECK-2, with gene fragments of Papain like viral protein (nsp5), Conoravirus endopeptidase C30 (nsp6), RNA synthesis protein (nsplO), RNA-dependent RNA polymerase (nspl2), and structure proteins S, E, M and N. psiCHECK-2 Vectors are designed to provide a quantitative and rapid approach for initial optimization of RNA interference (RNAi). The vectors enable monitoring of changes in expression of a target gene fused to a reporter gene. The DNA fragments of nsp5, nsp6, nsplO, nspl2 and structure proteins S, E, M and N were amplified by PCR with specific primers to those genes, and then cloned into the multiple cloning sites of psiCHECK-2 Vector. In this vector, Renilla Luciferase is used as a primary reporter gene, and the siRNA targeting genes located downstream of the Renilla translational stop codon.
Vero cells were seeded in 96-well plates and incubated for 12h. The reporter plasmids (recombinant vectors) psi-nsp5, psi-nsp6, psi-nsplO, psi-nspl2, psi-S, psi-E, psi-M and psi-N, and siRNA candidates were co-transfected into Vero cells using Lipofectamine 2000 in the DMEM without FBS. The blank psi vector is taken as a negative control. Six hours post- transfection, the media was replaced with the DMEM supplemented with 10% FBS. 18, 24, 36 and 48 h post-transfection the activity of the firefly luminescence and Renilla Luciferase in each well was detected using the Dual Luciferase Kit. The siRNA candidates dramatically decreased luciferase activity which indicates that siRNA could greatly inhibit the expression of the target genes of MERS-CoV were selected for the assay of infection with MERS-CoV in vitro.
B. Infection of Vero cells with MERS-CoV To investigate whether the real MERS-CoV mRNAs for nsp5, nsp6, nsplO, nspl2 and structure proteins S, E, M and N can be directly degraded by the specific mechanism of RNA interference (RNAi), Vero cells were seeded in 24-well plate and transfected with selected therapeutic single siRNA or siRNA combination candidates using Lipofectamine 2000 in the DMEM without FBS when cell monolayer reached 80% confluency. The transfection efficacy control is
Cy3 labeled siRNA. PBS was taken as a negative control. An siRNA with the sequence unrelated to MERS-CoV was used as another negative control. 24 h post- transfection the media containing the transfection reagent was replaced with fresh media supplemented with 2% FBS , and cells were infected with MERS-CoV. One hour post-infection, the inoculation solution was replaced with DMEM supplemented with 10%FBS. 24 h post-infection, cells were harvested for RNA isolation and 5'- rapid amplification of cDNA ends (5 '-RACE). In the other parallel experiment, at 24, 48 and 72 h post-infection, the cell supernatants were harvested for viral titer determination. All experiments were performed under Biosafety level-2 condition. The viral RNA were extracted from the cell supernatants, and the one-step
quantitative real-time PCR were performed with forward, reverse primers and TaqMan probe specific to the MERS-CoV isolate FRA/UAE spike protein. The total RNA from the harvested cells was extracted, and 5 '-RACE assays were carried out with gene-specific primers for cDNA products of nsp5, nsp6, nsplO, nspl2 and structure proteins S, E, M and N. The single siRNAs or siRNA combinations with high protection efficiency were selected for in vivo studies.
Example 5. HKP/siRNA nanoparticle and pulmonary delivery
Histidine-Lysine co-polymer (FDCP) siRNA nanoparticle formulations can be established by mixing together aqueous solutions of FDCP and siRNA in 4: 1 ratio by a molecular weight (N/P). A typical FDCP/siRNA formulation will provide nanoparticles in average size in 150 nm in diameter (Figure 4A). The self-assembled FDCP/siRNA
nanoparticles can be resuspended in aqueous solution, lyophilized into dry powder, and then resuspended in RNase free water (Figure 4B). After oral-trachial administration of HKP/siRNA (red labeled) nanoparticles to the mouse respiratory track we were able to observe fluorescent siRNA in the upper (bronchi), and lower airway (alveoli) (Figure 4C). We compared the efficacy of RNAi of cyclophiline B in the lung after oraltrachial deliveries of three different doses of siRNA with HKP, DOTAP and D5W . HKP-mediated delivery demonstrated the efficient RNAi of the target gene at the 2C^g dose (Figure 5).
Example 6. HKP/siRNA formulation for intraperitoneal delivery
During evaluation of prophylaxis and therapeutic benefit of siRNA inhibitors against influenza infection, we tested HKP/siRNA formulation through intraperitoneal
administration, using different dosage and regimens. Based on the observations of these treatment results, we found that the prophylactic effect of HKP/siRNA (two siRNAs arespecific to influenza genes) exceed the effect of Ribovirin (Figure 6). Similarly, the therapeutic effect of HKP/siRNA (two siRNAs are specific to influenza genes) is greater than
Tamiflu ® effect (Figure 7). Due to the fact that both influenza and MERS infections occur in the human respiratory system, we are envisioning that the similar therapeutic approach, such as the HKP/siRNA therapeutics, can be applied for treatment of MERS since we observed the positive therapeutic benefit.
Example 7. SLiC/siRNA nanoparticle
SLiC Liposome Preparation. Regular methods were tried at first to prepare liposomes with newly synthesized SLiC molecules, such as thin film method, solvent injection and so on without much success. Norbert Maurer et al reported a method of liposome preparation in which siRNA or oligonucleotide solution was slowly added under vortexing to the 50% ethanol solution (v/v) of liposome and ethanol was later removed by dialysis. The nanoparticles thus derived were small in size and homogeneous. In this method, siRNA was directly wrapped by cationic lipids during formation of liposome, while in most other methods siRNA or nucleic acid molecules are loaded (or entrapped) into preformed liposome, such as Lipofectamine 2000.
Lipids dissolved in ethanol are in so-called metastable state in which liposomes are not very stable and tend to aggregate. We then prepared un-loaded or pre-formed liposomes using modified Norbert Maurer's method. We found that stable liposome solution could be made by simply diluting ethanol to the final concentration of 12.5% (v/v). Liposomes were prepared by addition of lipids (cationic SLiC /cholesterol, 50:50, mol %) dissolved in ethanol to sterile dd-H20. The ethanolic lipid solution needs to be added slowly under rapid mixing. Slow addition of ethanol and rapid mixing were critical for the success in making SLiC liposomes, as the process allows formation of small and more homogeneous liposomes. Unlike conventional methods, in which siRNAs are loaded during the process of liposome formulation and ethanol or other solvent is removed at end of manufacturing, our SLiC liposomes were formulated with remaining ethanol still in the solution so that liposomes were thought to be still in metastable state. When siRNA solution was mixed/loaded with liposome solution cationic groups, lipids will interact with anionic siRNA and condense to form core. SLiC liposomes' metastable state helped or facilitated liposome structure transformation to entrap siRNA or nucleic acids more effectively. Because of the entrapment of siRNA, SLiC liposomes become more compact and homogeneous.
Physiochemical Characterization of SLiC Liposome. After the liposome formation, we have developed an array of assays to characterize the physicochemical properties of SLiC liposome, including particle size, surface potential, morphology study, siRNA loading efficiency and biological activity, etc. The particle size and zeta-potentials of SLiC liposomes were measured with Nano ZS Zeta Sizer (Malvern Instruments, UK). Each new SLiC liposome was tested for particle size and zeta-potential when ethanol contents changed from 50% to 25% and to 12.5%. Data were derived from formulations of different ethanol contents. All SLiC liposomes were prepared at lmg/ml in concentration and loaded with siRNA (2: 1, w/w). Each of SLiC Liposomes was composed of cationic SLiC and cholesterol dissolved in ethanol at 12.5%, e.g. TM2 (12.5). The average particle sizes of three sequential measurements and the average zeta-potentials of three sequential measurements were illustrated in Table IV.
Further analysis of the physiochemical perimeters of the SLiC liposome suggested that ethanol concentrations were positively proportional to particle sizes (the lower of ethanol concentration, the smaller of particle sizes), but negatively proportional to zeta-potential (the lower of ethanol concentration, the higher of zeta-potential at the same time). The higher surface potential will render particles more stable in solution. In addition to stability in solution, data shown later also indicated that toxicity was lower with lower ethanol concentration, too. Therefore, to put all factors together, ethanol concentration of 12.5% (v/v) was selected as solvent to suspend cholesterol as well as SLiC into the master working stock solution before they were used to make liposome formulations.
In contrast to bare SLiC liposome formulation, liposomes particle sizes became much smaller when they were loaded with siRNA at 2: 1 (w/w) resulting in particle sizes in the range of 110 to 190nm in diameter and much lower PDI values. Conventional consideration of liposomal structure dictates that siRNA is loaded or interacted with cationic lipids through electrostatic forces and liposomes wraps siRNA to form spherical particles in shape in order to reduce surface tension. As the result, the liposomes particle sizes became much smaller after loaded with siRNA. Liposomes formulated with siRNA also have lower surface charge, which could be explained by neutralizing effect from loaded siRNA.
Example 8. Airway Delivery with Mouse Model
Human host-cell dipeptidyl peptidase 4 (hDPP4) has been shown to be the receptor of MERS-CoV. However, mouse is not a suitable small-animal model for MERS-CoV as it has no receptor being recognized and bound by the virus. In this study, the mice were sensitized to MERS-CoV infection by transduction with Adenoviral or Lentiviral vector expressing hDPP4 in the respiratory tract. This mouse model was used to investigate the efficiency of the siRNA on inhibiting the MERS-CoV infection in vivo. The siRNA combination candidate was delivered by encapsidated with HKP-SLiC nanoparticle system. We performed all mouse studies under Biosafety level-3 conditions.
All BALB/c mice were 18 weeks old and tested as specific pathogen-free at the beginning of this study. To develop the susceptibility to MERS-CoV, 30 mice of Adenoviral vector group and 30 mice of Lentiviral vector group were transduced with Adenoviral and Lentiviral vector expressing hDPP4, respectively. Another 20 mice were transduced with empty Adenoviral or Lentiviral vector as the control. For the Adenoviral vector group, hDDP4 gene was cloned into the Ad5. Then MLE 15 cells were transduced with Ad5-hDDP4 at an MOI of 20. The supernatant were collected at 48 h post-infection. The mice were transduced intranasally with 108 pfu of Ad5-hDDP4. For the Lentiviral vector group, hDDP4 gene was cloned into the plasmid pWPXLd. Then, pWPXLd-hDPP4, along with packaging vector, psPAX2, and envelope vector, pMD2.G, was co-transfected into packaging cell line HEK 293 T using calcium phosphate method. At 48 h post-transfection, the constructed viral vector was harvested and purified, and transducted with CHO cells. The lentivirus was harvested and concentrated. The mice were transduced intranasally with lentivirus expressing hDPP4 at titers of 108 transducing units/ml (TU/ml).
After confirming the hDPP4 was expressed in the respiratory tract of the mice by western blot, the Adenoviral and Lentiviral vector groups were further divided into prophylactic, therapeutic and control subgroup with ten mice in each subgroup. Ten mice from Ad5-hDDP4 or psPAX2-hDDP4 prophylactic subgroup were intranasally inoculated with siRNA combination encapsidated with HKP-SLiC nanoparticle system 24 h before inoculation. 24 h later, all eighty mice including transduced with empty vector were infected intravenously with 105 pfu of MERS-CoV. The prophylactic, therapeutic and control subgroup were intranasally inoculated with siRNA or PBS at 0, 24, 48, 72 and 96 h postinfection.
All mice were weighed and the survivors of each subgroup were counted daily. The nasal washes were collected at 1, 3, 5, 7, 9, and 14 day post-infection for the viral titration. Two infected mice from each group were sacrificed at 3 and 5 day post-infection, respectively. The tissue collection, including lung, trachea, spleen, liver, heart, brain and kidney, were collected for pathological and virological study.
To determine the viral titers, the tissue samples were homogenized in DMEM, and clarified by centrifugation. Both tissue suspensions and nasal washes werelO-fold serially diluted. The dilutions were added to the Vero cells monolayers grown in 96-well plates. The cytopathic effects (CPEs) were observed on day 3 post-infection, and the TCID50 was calculated by the Reed-Muench method.
To investigate the efficiency of siRNA candidates in inhibiting viral gene expression, the total RNAs were extracted from the tissues and the one-step quantitative real-time PCR were performed with forward, reverse primers and TaqMan probe specific to the conserved region of nspl2 (RNA-dependent RNA polymerase) of MERS-CoV.
Example 9. Intraperitoneal siRNA Nanoparticle Solution
In vivo administration of siRNAs. The in vivo experiments were conducted using 6-8 week old female mice. For inoculation, allantoic fluid containing the virus at a dose of 5 χ 104 EID5o/mL was used. The infectious activity of the virus in allantoic fluid was determined in vivo by titration of lethality. Titers of the virus were calculated using the Reed and Muench method. Non-infected mice that were kept in the same conditions as the infected animals were used as a negative control. Virus was administered to the animals intranasally under a light ether anesthesia. Each group of animals contained 15 mice. siRNA (1 : 1 ratio of siRNAs 89 and 103) complexed with PAA as described above, was administered to the animals at the dose of 1-10 mg/kg of body weight. siRNA was administered intraperitoneally (200ul per injection). Control animals received PAA without siRNAs. Animals were observed for 14 days post inoculation. The mortality of the animals in control and experimental groups was registered daily. The mortality percentage (M) was calculated in each group as: M=N Nt where: N - the number of animals died withinl4 days after infection; Nt - the total number of animals in the group. The index of protection (IP) was calculated as: IP=((Mc-Me) Mc)xl00%, where: Mc and Me - percentage of mortality in control and experimental groups, correspondingly. The median day of death (MDD) within 14 days was calculated as: MDD=(∑ N D) Nt, where: N - the number of animals surviving D days; Nt - total number of animals in the group Tamiflu ® (oseltamivir phosphate, Roche, Switzerland) was used as a reference compound. It was administered at a dose of 25 mg/kg by the same protocol.
The intraperitoneal administration could be a viable alternative, especially in patients with severe influenza with low gas-exchange volume and/or those on mechanical lung ventilation. Since siRNAs of the same length show similar properties (charge,
hydrophobicity, molecular weight etc) and since siRNAs can be rapidly designed and manufactured, it is feasible that nanoparticle-mediated siRNA delivery may form an intermediate therapeutic strategy in treating rapidly emerging influenza virus strains with high mortality rates that do not respond to existing therapies, while vaccines to protect the general population are under development. The siRNA cocktail demonstrated herein may provide significant value as a prophylactic/ therapeutic with broad anti-influenza strain coverage and this coverage may well extend to as yet unidentified Influenza strains that may emerge in the future. As stated in the Example 6, the therapeutic benefit we observed during the study using siRNA approach against influenza viral infection has provided a good example to follow: the HKP/siRNA nanoparticle delivery through IP route or respiratory route, targeting the conservative regions of the critical viral gene sequences, and siRNA cocktail design, etc.
We demonstrated in this study that polymeric nanoparticle-mediated delivery of a combination of two siRNAs, via IP administration, can result in a potent antiviral effect in the viral-challenged animals. Histidine Lysine Co-Polymer (HKP) nanoparticle-mediated siRNA delivery has been well validated through multiple routes with various animal models (17). We recently completed a full scale safety study for HKP-siRNA nanoparticle formulation via subcutaneous administration into both mouse and monkey models (data not shown). When HKP-siRNA103/105 formulation was IP administrated (10 mg/kg/day), a prophylactic and therapeutic benefit greater than that observed with Ribavirin (75 mg/kg/day) in protecting mice from exposure to a 2xLD50 dose of the virus. (Ribavirin is manufactured by multiple companies in the United States: Copegus produced by Genentech (member of the Roche group), Rebetol by Merck Sharp & Dome, a subsidary of Merck & Co., Inc.,
and Rihasphere by Kadmon Pharmaceuticals (orginally by Three Rivers Pharmaceuticals which was acquired by Kadmon Pharmaceuticals). In addition, several companies, including Sandoz and Teva pharmaceuticals, produce generic ribavirin.) The data obtained suggests that IP injection of peptide nanoparticles containing siRNAs or of a polycationic delivery vehicle carrying siRNAs can both ameliorate the lethality induced by Influenza infection in mice and therefore may suggests the ability to overcome some of these barriers. The amphiphilic poly(allylamine) (PAA) formed polymeric micelles (PM) has been evaluated for siRNA delivery via the GI tract, resulting in efficient siRNA delivery and
endosome/lysosome release. PAA and siRNA can be self-assembled into complexes with nano-sized diameters (150-300 nm) and cationic surface charge (+ 20 to 30 mV). When we IP administered PAA-siRNA89/103 formulation (10 mg/kg) a therapeutic antiviral activity was observed equivalent to that of Tamiflu (25 mg/kg). These results clearly demonstrated that polymeric nanoparticle delivery of siRNA combinations may provide a
prophylactic/therapeutic response against newly emergent strains of influenza virus. A similar approach can be considered for a MERS siRNA therapy.
Example 10. Effects on Innate Immunity in Lung
To evaluate the cytokine response after HKP/siRNA formulation administration to the mouse airway, we collected the lung lavage samples from the Balb/c mice treated with intratracheal instillation of HKP/siRNA aqueous solution (the cohort and dosage described in Table A). The lavage samples were further measured for the TNF-a, IL-6 and IFN-a changes before and after the treatment using commercial available ELISA assay (Figure 10). We first established a standard curve (using Lowry method) of the protein concentration and then measured the protein concentrations of each collected sample, where the STP705 stands for HKP/siRNA groups with different siRNA concentrations (Figure 11). Based on the standard curves for TNF-a, IL-6 and IFN-a we established using the commercial kits (Figure 12A, Figure 13A and Figure 14A), we measured the TNF-a, IL-6 and IFN-a cytokine levels of each collected samples (Figure 12B, Figure 13B and Figure 14B). With comparisons between the normal mouse lungs and LPS treated mouse lungs, and HKP/siRNA treated lungs, we found that (1) HKP/siRNA treatment has little impact on the lung TNF-a level changes (Figure 12B); (2) Various HKP/siRNA formulations with different siRNA concentrations can induce IL-6 level elevation (Figure 13B); (3) There is no significant changes of the IFN-a levels with the HKP/siRNA formulation treatments.
Table A. Effect of siRNA-HKP nano articles on innate immunit at lun
Figure imgf000031_0001
Example 11. Non-human Primate Study
Currently, there is neither an effective vaccine nor drug available for prophylatic or therapeutic strategy. Recently, rhesus macaque has been developed as a model for MERS- CoV using intratracheal inoculation. Similar to human, the infected monkeys showed clinical signs of disease, virus replication, and histological lesions, indicating that rhesus macaque is a good model for evaluation of vaccine and antiviral strategies against MERS-CoV infection.
To investigate the efficiency of the siRNA on protecting and healing from MERS- CoV infection, we plan to perform the non-human primate study in rhesus macaques. The siRNA cocktail candidate will be encapsidated with HKP-SLiC nanoparticle system, and administered intratracheally. This monkey study should be carried out under Biosafety Level- 3 condition.
All rhesus monkeys should be 2-3 years old at the beginning of this study. At the beginning, all monkeys need to be tested negative for MERS-CoV. Twelve monkeys should be divided into three groups—prophylactic, protection, and control group with four animals in each group. Four monkeys of prophylactic group should be intratracheally inoculated with siRNA combination encapsidated in FD P-SLiC nanoparticle system using a nebulizer. 24 h later, all twelve monkeys should be intratracheally inoculated with 6.5 χ 107 TCID50 of MERS-CoV in 1 mL. The prophylactic and protection groups should be continuously inoculated with siRNA combination at 0, 24, 48, 72 and 96 h post-infection using the nebulizer. The control group will be inoculated with PBS at the same time points.
All monkeys will be observed twice daily for the symptoms and mortality. Chest X-rays need to be performed 1 day pre-infection and 3, and 5 day post-infection. Oropharyngeal, nasal, and cloacal swabs should be collected at 1, 3, 5, 7, 9, 14, 21, and 28 day post-infection for the viral titration. Two infected monkeys from each group will be sacrificed on the day 3 post-infection. The tissue including lung, trachea, spleen, liver, heart, brain, kidney, and colon tissue will be collected for pathological and virological study.
The viral titers determination in the tissue and swab samples should be performed as described in Example 2. To investigate the efficiency of siRNA candidates on inhibiting viral gene expression, the total RNA will be extracted from the tissues and the one-step
quantitative real-time PCR were performed.
To investigate the efficiency of siRNA candidates on inhibiting viral protein expression, the total RNA will be extracted from the tissues and the one-step quantitative real-time PCR will be performed as described in Example 8.
REFERENCES
1. Zumbla A, et al. (2015) Middle East respiratory syndrome. Lancet SO 140- 6736(15)60454-8.
2. Jalal S. (2015) The emerging threat of MERS. J Pak Med Assoc. 65(3):310-1.
3. de Wit E, et al. (2013) Middle East respiratory syndrome coronavirus (MERS-CoV) causes transient lower respiratory tract infection in rhesus macaques. Proc Natl Acad Sci USA 110: 16598-16603.
4. Chan JF (2015) Middle East Respiratory Syndrome Coronavirus: Another Zoonotic
Betacoronavirus Causing SARS-Like Disease Clin, Microbiol. 28(2): 465-522,
5. Totura AL, Baric RS (2012) SARS coronavirus pathogenesis:Host innate immune
responses and viral antagonism of interferon. Curr Opin Virol 2:264-275.
6. Abdel-Moneim AS (2014) Middle East respiratory syndrome coronavirus (MERS- CoV): evidence and speculations. Arch Virol. 159(7): 1575-84.
7. Pascal K, et al. (2015) Pre- and postexposure efficacy of fully human antibodies against Spike protein in a novel humanized mouse model of MERS-CoV infection. Proc Natl Acad Sci U S A. pii: 201510830. 8. de Wilde AH et al. (20 14 ) Screening of an FDA-approved compound library identifies four small-molecule inhibitors of Middle East respiratory syndrome coronavirus replication in cell culture. Chemother. 58(8):4875-84. doi: 10.1 128/AAC.0301 1-14.
9. Falzarano D, et al.,( 2013) Treatment with interferon-a2b and ribavirin improves
outcome in MERS-CoV-infected rhesus macaques. Nat Med 19(10): 1313-1317.
10. Lu L. et al.(2015) Urgent development of effective therapeutic and prophylactic agents to control the emerging threat of Middle East respiratory Syndrome (MERS). Emerging Microbes & Infections (2015) 4, e37; doi: 10.1038/emi.2015.37.
1 1. Zhao J, et al (2015) Passive immunotherapy with dromedary immune serum in an
experimental animal model for middle East respiratory syndrome coronavirus infection.
Virol. 89(1 1):61 17-20. doi: 10.1 128/JVI.00446-15.
12. Tianlei Ying et al (2015) Development of human neutralizing monoclonal antibodies for prevention and therapy of MERS-CoV infections. Microbes and Infection 17 (2015) 142-148.
13. Needle D. et al. (2015) Structures of the Middle East respiratory syndrome coronavirus 3C-like protease reveal insights into substrate specificity Acta Cryst. (2015). D71, 1 102- 1 1 1 1.
14. Chan et al. (2013)Differential cell line susceptibility to the emerging novel
humanbetacoronavirus 2c EMC/2012: implications for disease pathogenesisand clinical manifestation. J Infect Dis 207: 1743-1752
15. Lundin A et al .( 2014) Targeting membrane-bound viral RNA synthesis reveals potent inhibition of diverse coronaviruses including the middle East respiratory syndrome virus. PLoS Pathogens, vol. 10, no. 5, Article ID el004166, 2014.
16. Zhao J, et al. (2014) Rapid generation of a mouse model for Middle East respiratory syndrome. Proc Natl Acad Sci USA 1 1 1(13):4970-4975.
17. Leng, Q and Mixson J. et al. Systemic delivery of HK Raf-l siRNA Polyplexes Inhibits MDA-MB-435 Xenografts. Cancer Gene Therapy.1-11(2008).
The disclosures of all publications identified herein, including issued patents and published patent applications, and all database entries identified herein by url addresses or accession numbers are incorporated herein by reference in their entirety.
Although this invention has been described in relation to certain embodiments thereof, and many details have been set forth for purposes of illustration, it will be apparent to those skilled in the art that the invention is susceptible to additional embodiments and that certain of the details described herein may be varied considerably without departing from the basic principles of the invention. Table 1
Figure imgf000034_0001
GGGAGAGUUCGUUGUCAACGAUGUU 1 times at 1738 NSP2
GCCGGCCCAUUCAUGGAUAAUGCUA 1 times at 1880 NSP2
CCGGCCCAUUCAUGGAUAAUGCUAU 1 times at 1881 NSP2
CGGCCCAUUCAUGGAUAAUGCUAUU 1 times at 1882 NSP2
GGCCCAUUCAUGGAUAAUGCUAUUA 1 times at 1883 NSP2
GCCCAUUCAUGGAUAAUGCUAUUAA 1 times at 1884 NSP2 GCCCAUUCAUGGAUAAUGCUAUU
CCCAUUCAUGGAUAAUGCUAUUAAU 1 times at 1885 NSP2 CCCAUUCAUGGAUAAUGCUAUUA
GCUAUUAAUGUUGGUGGUACAGGAU 1 times at 1901 NSP2
CGCCAUUACUGCACCUUAUGUAGUU 1 times at 1936 NSP2 CGCCAUUACUGCACCUUAUGUAG
GCUCACAGCGUGUUGUACAGAGUUU 1 times at 2048 NSP2
GCGUGUUGUACAGAGUUUUUCCUUA 1 times at 2055 NSP2
CGUGUUGUACAGAGUUUUUCCUUAU 1 times at 2056 NSP2 GUGUUGUACAGAGUUUUUCCUUA
GGCGACUUUAUGUCUACAAUUAUUA 1 times at 2186 NSP2 GGCGACUUUAUGUCUACAAUUAU
CCAAACUGCUGUUAGUAAGCUUCUA 1 times at 2218 NSP2
GCUGUUAGUAAGCUUCUAGAUACAU 1 times at 2225 NSP2 CUGUUAGUAAGCUUCUAGAUACA
GCAACAU U U AACU UCUUGUUAGAUU 1 times at 2267 NSP2 AACAUUUAACUUCUUGUUAGAUU
CCUAUGUGUACACUUCACAAGGGUU 1 times at 2325 NSP2
GGAACCUAUUACUGUGUCACCACUA 1 times at 2504 NSP2
GGUUGAAACUGUUGUGGGUCAACUU 1 times at 2653 NSP2
GCAAACUAAUAUGCAUAGUCCUGAU 1 times at 2680 NSP2
GGUGACUAUGUCAUUAUUAGUGAAA 1 times at 2714 NSP2
GGGAGGUGCACCUGUAAAAAAAGUA 1 times at 2830 NSP2
CG AG U ACAACAU UCAUGCUGUAUUA 1 times at 2908 NSP3
GCUGUAUUAGACACACUACUUGCUU 1 times at 2924 NSP3
GGAGUUUGCUGACGUAGUAAAGGAA 1 times at 2995 NSP3
GCGUGGAAUGCCGAUUCCAGAUUUU 1 times at 3049 NSP3
GGAAUGCCGAUUCCAGAUUUUGAUU 1 times at 3053 NSP3
CCAG AU U U U G AU U U AG ACG AU U U U A 1 times at 3065 NSP3
CGAUUUUAUUGACGCACCAUGCUAU 1 times at 3082 NSP3
CCCGUCGAGUGUGACGAGGAGUGUU 1 times at 3164 NSP3
CGAGUGUGACGAGGAGUGUUCUGAA 1 times at 3169 NSP3
GGCUUCAGAUUUAGAAGAAGGUGAA 1 times at 3199 NSP3
GCUUCAGAUUUAGAAGAAGGUGAAU 1 times at 3200 NSP3
CGACGAGUGGGCUGCUGCAGUUGAU 1 times at 3283 NSP3
CGAGUGGGCUGCUGCAGUUGAUGAA 1 times at 3286 NSP3
GGGCUGCUGCAGUUGAUGAAGCGUU 1 times at 3291 NSP3
GCAAGAAGAAGCACAACCAGUAGAA 1 times at 3352 NSP3
CCAGUAGAAGUACCUGUUGAAGAUA 1 times at 3368 NSP3
GCAGGUUGUCAUAGCUGACACCUUA 1 times at 3397 NSP3
GGUUAUUACAGAGUGCGUUACCAUA 1 times at 3628 NSP3
GGCGGUGGUAUCGCUGGUGCUAUUA 1 times at 3734 NSP3
GCGGUGGUAUCGCUGGUGCUAUUAA 1 times at 3735 NSP3
CGGUGGUAUCGCUGGUGCUAUUAAU 1 times at 3736 NSP3
GCUGGUGCUAUUAAUGCGGCUUCAA 1 times at 3746 NSP3
GCGGCUUCAAAAGGGGCUGUCCAAA 1 times at 3761 NSP3 CGGCUUCAAAAGGGGCUGUCCAAAA 1 times at 3762 NSP3
GGCUUCAAAAGGGGCUGUCCAAAAA 1 times at 3763 NSP3
GCCGUUACAAGUAGGAGAUUCAGUU 1 times at 3817 NSP3
CGUAGGCCCAGAUGCCCGCGCUAAA 1 times at 3883 NSP3
CCCAGAUGCCCGCGCUAAACAGGAU 1 times at 3889 NSP3
GGCUAUGAAUGCAUAUCCUCUUGUA 1 times at 3940 NSP3
CCAGCUGUGUCUUUUGAUUAUCUUA 1 times at 4004 NSP3
GCUGUGUCUUUUGAUUAUCUUAUUA 1 times at 4007 NSP3 CUGUGUCUUUUGAUUAUCUUAUU
CGUCGUUAAUU CCCAAG AU G U CU AU 1 times at 4057 NSP3
GGCGCAAUACGUAAAGCUAAAGAUU 1 times at 4142 NSP3
GCGCAAUACGU AAAG CU AAAG AU U A 1 times at 4143 NSP3
CGCAAUACGUAAAGCUAAAGAUUAU 1 times at 4144 NSP3 CGCAAUACGUAAAGCUAAAGAUU
CGUAAAGCUAAAGAUUAUGGUUUUA 1 times at 4151 NSP3
GCUAAAGAUUAUGGUUUUACUGUUU 1 times at 4157 NSP3
GCACAGACAACUCUGCUAACACUAA 1 times at 4188 NSP3
GGAACAAGGGUGUUGAUUAUACUAA 1 times at 4221 NSP3
GGGUGUUGAUUAUACUAAGAAGUUU 1 times at 4228 NSP3 GGGUGUUGAUUAUACUAAGAAGU
CGUCUAAGGACACUUUAGAUGAUAU 1 times at 4287 NSP3
GGACACUUUAGAUGAUAUCUUACAA 1 times at 4294 NSP3 GACACUUUAGAUGAUAUCUUACA
GCUAAUAAGUCUGUUGGUAUUAUAU 1 times at 4322 NSP3
GGUAUUAUAUCUAUGCCUUUGGGAU 1 times at 4337 NSP3
CCUUUGGGAUAUGUGUCUCAUGGUU 1 times at 4352 NSP3
GCCCUACGUGUGUCUCCUAGCUAAU 1 times at 4420 NSP3
CCCUACGUGUGUCUCCUAGCUAAUA 1 times at 4421 NSP3
CCUACGUGUGUCUCCUAGCUAAUAA 1 times at 4422 NSP3
GCUAAUAAAGAGCAAGAAGCUAUUU 1 times at 4439 NSP3
GCAAGAAGCUAUUUUGAUGUCUGAA 1 times at 4450 NSP3
GCUAUUUUGAUGUCUGAAGACGUUA 1 times at 4457 NSP3
CG U U AAG U U AAACCC U U C AG AAG AU 1 times at 4477 NSP3
CGUCCGCACUAAUGGUGGUUACAAU 1 times at 4513 NSP3
CGCACUAAUGGUGGUUACAAUUCUU 1 times at 4517 NSP3 CGCACUAAUGGUGGUUACAAUUC
CCUGCAUUGGUCUGAUCAAACCAUA 1 times at 4594 NSP3
GGAUUCACGCACGACACAGCAGUUA 1 times at 4702 NSP3
GCGUUUUCUUUAAUGGUGCUGAUAU 1 times at 4815 NSP3
CGUUUUCUUUAAUGGUGCUGAUAUU 1 times at 4816 NSP3
GCAGACAAUUUGACUGCUGAUGAAA 1 times at 4889 NSP3
CCUACUUUCUUACACAGAUUCUAUU 1 times at 4949 NSP3 UACU UUCU U ACACAGAU UCUAU U
CGGUUACUUCAUACCGUGCUUGCAA 1 times at 5222 NSP3
GGUUACUUCAUACCGUGCUUGCAAA 1 times at 5223 NSP3
GCAUGGUUUGGAGAGAGUGGUGCAA 1 times at 5271 NSP3
GCUUGUUGUUACGUGGGUGUGCAAA 1 times at 5336 NSP3
CGUGGGUGUGCAAACUGUUGAAGAU 1 times at 5347 NSP3
GGUUGCUGCUCUCAGGCACACCAAA 1 times at 5448 NSP3
GCUGCUCUCAGGCACACCAAAUGAA 1 times at 5452 NSP3
GCU CU CAG GCACACCAAAU G AAAAA 1 times at 5455 NSP3 GGUGACAACCUCCACGGCGCCUGAU 1 times at 5482 NSP3
GGGCAUUGAAACGGCUGUUGGCCAU 1 times at 5530 NSP3
GGCAUUGAAACGGCUGUUGGCCAUU 1 times at 5531 NSP3
GCAUUGAAACGGCUGUUGGCCAUUA 1 times at 5532 NSP3
CCG U U AG CAAGACU U CAG ACU GG AA 1 times at 5607 NSP3
GCAAGACUUCAGACUGGAAGUGCAA 1 times at 5613 NSP3
G G CC AAAAAU ACAG U AG CG AU U G U A 1 times at 5660 NSP3
G CC AAAAAU ACAG UAGCGAUUGUAA 1 times at 5661 NSP3
CCAAAAAUACAGUAGCGAUUGUAAU 1 times at 5662 NSP3
CGUACGGUAUUCUUUGGACGGUAAU 1 times at 5689 NSP3
GGACGGUAAUUUCAGAACAGAGGUU 1 times at 5704 NSP3
CGGUAAUUUCAGAACAGAGGUUGAU 1 times at 5707 NSP3
CCCGACCUAUCUGCUUUCUAUGUUA 1 times at 5732 NSP3
CCGACCUAUCUGCUUUCUAUGUUAA 1 times at 5733 NSP3 GACCUAUCUGCUUUCUAUGUUAA
CCUAUCUGCUUUCUAUGUUAAGGAU 1 times at 5737 NSP3
GCUUUCUAUGUUAAGGAUGGUAAAU 1 times at 5744 NSP3
GGAUGGUAAAUACUUUACAAGUGAA 1 times at 5758 NSP3
CCACCCGUAACAUAUUCACCAGCUA 1 times at 5783 NSP3
CCCGUAACAUAUUCACCAGCUACAA 1 times at 5786 NSP3
CCG UAACAUAU UCACCAGCU ACAAU 1 times at 5787 NSP3
CGUAACAUAUUCACCAGCUACAAUU 1 times at 5788 NSP3
GGACAACCUGGCGGUGAUGCUAUUA 1 times at 5858 NSP3
GGCGGUGAUGCUAUUAGUUUGAGUU 1 times at 5867 NSP3
GCGGUGAUGCUAUUAGUUUGAGUUU 1 times at 5868 NSP3
CGGUGAUGCUAUUAGUUUGAGUUUU 1 times at 5869 NSP3
GGUGAUGCUAUUAGUUUGAGUUUUA 1 times at 5870 NSP3 GUGAUGCUAUUAGUUUGAGUUUU
CGGCGAUGUGUUGUUGGCUGAGUUU 1 times at 5968 NSP3
GCUGAGUUUGACACUUAUGACCCUA 1 times at 5984 NSP3
GGUGCCAUGUAU AAAG G CAAACC AA 1 times at 6020 NSP3
GCAUCUUAUGAUACUAAUCUUAAUA 1 times at 6062 NSP3 AUCUUAUGAUACUAAUCUUAAUA
CGUAGCCCCCAUUGAACUCGAAAAU 1 times at 6121 NSP3
GCCCCCAUUGAACUCGAAAAUAAAU 1 times at 6125 NSP3 CCCCAUUGAACUCGAAAAUAAAU
CCCCCAU U G AACU CG AAAAU AAAU U 1 times at 6126 NSP3 CCCAUUGAACUCGAAAAUAAAUU
CCUUUCGUGAAGGACAAUGUCAGUU 1 times at 6254 NSP3
CGUGAAGGACAAUGUCAGUUUCGUU 1 times at 6259 NSP3
GGACAAUGUCAGUUUCGUUGCUGAU 1 times at 6265 NSP3
CCCUAAGUAUCAAGUCAUUGUCUUA 1 times at 6352 NSP3
CCUAAGUAUCAAGUCAUUGUCUUAA 1 times at 6353 NSP3 CCCUAAGUAUCAAGUCAUUGUCU
GCACACCGUUGAGUCAGGUGAUAUU 1 times at 6409 NSP3
CGUUGAGUCAGGUGAUAUUAACGUU 1 times at 6415 NSP3
GGUGAUAUUAACGUUGUUGCAGCUU 1 times at 6425 NSP3
GGGCUUCAUUUUAUUUCAAAGAAUU 1 times at 6486 NSP3
GGCUUCAUUUUAUUUCAAAGAAUUU 1 times at 6487 NSP3 GGCUUCAUUUUAUUUCAAAGAAU
GCUACCACUGCUGUAGGUAGUUGUA 1 times at 6530 NSP3
CCACUGCUGUAGGUAGUUGUAUAAA 1 times at 6534 NSP3 GGCAUAUUGACAGGCUGUUUUAGUU 1 times at 6590 NSP3
GCAUAUUGACAGGCUGUUUUAGUUU 1 times at 6591 NSP3
GCUUCCACUAGCUUACUUUAGUGAU 1 times at 6634 NSP3
CCACUAGCUUACUUUAGUGAUUCAA 1 times at 6638 NSP3 CACUAGCUUACUUUAGUGAUUCA
CCACAG AG G UUAAAG UGAGUGCUUU 1 times at 6672 NSP3
GGCGUUGUGACAGGUAAUGUUGUAA 1 times at 6707 NSP3
GCGUUGUGACAGGUAAUGUUGUAAA 1 times at 6708 NSP3
CGUUGUGACAGGUAAUGUUGUAAAA 1 times at 6709 NSP3
GCACUGCUGCUGUUGAUUUAAGUAU 1 times at 6741 NSP3
GCUGCUGUUGAUUUAAGUAUGGAUA 1 times at 6746 NSP3
CCGUGUGGAUUGGAAAUCAACCCUA 1 times at 6778 NSP3
CGGUUGUUACUUAUGUUAUGCACAA 1 times at 6803 NSP3
CCCAAGGU U UGAAAAAG UUCUACAA 1 times at 6906 NSP3 CCCAAG G U U UGAAAAAG U U CU AC
CCAAGGUUUG A AAAAG U U C U AC AAA 1 times at 6907 NSP3 AAG G U U U G AAAAAG UUCUACAAA
GCUUGUGACGGUCUUGCUUCAGCUU 1 times at 6962 NSP3
GCGCAAACCGUUCUGCAAUGUGUAA 1 times at 7020 NSP3
CGCAAACCGUUCUGCAAUGUGUAAU 1 times at 7021 NSP3
GCAAACCGUUCUGCAAUGUGUAAUU 1 times at 7022 NSP3
GCAAUGUGUAAUUGGUGCUUGAUUA 1 times at 7034 NSP3
GGUGCUUGAUUAGCCAAGAUUCCAU 1 times at 7047 NSP3
CCAUAACUCACUACCCAGCUCUUAA 1 times at 7068 NSP3
GGUUCAAACACAUCUUAGCCACUAU 1 times at 7096 NSP3
GGCAGGUACAUUGCAUUAUUUCUUU 1 times at 7207 NSP3 CAGGUACAUUGCAUUAUUUCUUU
CCAUAUUUGUAGACUGGCGGUCAUA 1 times at 7242 NSP3
CGGUCAUACAAUUAUGCUGUGUCUA 1 times at 7259 NSP3
GCUGUGUCUAGUGCCUUCUGGUUAU 1 times at 7274 NSP3
GCUUUUACGCAAGUUUUAUCAGCAU 1 times at 7357 NSP3
GCAAGUUUUAUCAGCAUGUAAUCAA 1 times at 7365 NSP3
GCAUGUAAUCAAUGGUUGCAAAGAU 1 times at 7378 NSP3
GCUCUGCUAUAAGAGGAACCGACUU 1 times at 7414 NSP3
CGACUUACUAGAGUUGAAGCUUCUA 1 times at 7433 NSP3
GCUUCUACCGUUGUCUGUGGUGGAA 1 times at 7451 NSP3
CGGUAUUUCAUUCUGUCGUAGGCAU 1 times at 7504 NSP3
GGUAUUUCAUUCUGUCGUAGGCAUA 1 times at 7505 NSP3
GGGGAAUACCUUCAUCUGUGAAGAA 1 times at 7564 NSP3
CCUUCAUCUGUGAAGAAGUCGCAAA 1 times at 7572 NSP3
GCCCUACGCAGGCCUAUUAACGCUA 1 times at 7610 NSP3
CGCAGGCCUAUUAACGCUACGGAUA 1 times at 7616 NSP3
CGCUACGGAUAGAUCACAUUAUUAU 1 times at 7630 NSP3
GGAUAGAUCACAUUAUUAUGUGGAU 1 times at 7636 NSP3
CGUUACAGUUAAAGAGACUGUUGUU 1 times at 7663 NSP3
CCUCUGCGCUUUUACAAAUCUAGAU 1 times at 7735 NSP3
GCGCUUUUACAAAUCUAGAUAAGUU 1 times at 7740 NSP3 GCGCUUUUACAAAUCUAGAUAAG
GGUCUGUAAAACUACUACUGGUAUA 1 times at 7777 NSP3
GCUAGGUCUGCAUGUGUUUAUUAUU 1 times at 7856 NSP3 GGUGAUUCUAGUGAAAUCGCCACUA 1 times at 7937 NSP3
CGCCACUAAAAUGUUUGAUUCCUUU 1 times at 7954 NSP3
CGCUGUAUAAUGUCACACGCGAUAA 1 times at 7995 NSP3
CGUGAUGGCGUAAGGCGAGGCGAUA 1 times at 8045 NSP3
CGUAAGGCGAGGCGAUAACUUCCAU 1 times at 8053 NSP3
GGCGAUAACUUCCAUAGUGUCUUAA 1 times at 8063 NSP3
CCAUAGUGUCUUAACAACAUUCAUU 1 times at 8074 NSP3
CGGCUUCAGUUAACCAAAUUGUCUU 1 times at 8286 NSP3 GGCUUCAGUUAACCAAAUUGUCU
CCAAAUUGUCUUGCGUAAUUCUAAU 1 times at 8299 NSP3
CGACAGAUUCGCAUUGCAUGCCGUA 1 times at 8378 NSP3
CGCAUUGCAUGCCGUAAGUGUAAUU 1 times at 8387 NSP3 CGCAUUGCAUGCCGUAAGUGUAA
GCAUUGCAUGCCGUAAGUGUAAUUU 1 times at 8388 NSP3
GCAUGCCGUAAGUGUAAUUUAGCUU 1 times at 8393 NSP3
CCUCAAAGCUACGCGCUAAUGAUAA 1 times at 8430 NSP3 CUCAAAGCUACGCGCUAAUGAUA
GCUACGCGCUAAUGAUAAUAUCUUA 1 times at 8437 NSP3
CGCUAAUGAUAAUAUCUUAUCAGUU 1 times at 8443 NSP3
GCUAAUGAUAAUAUCUUAUCAGUUA 1 times at 8444 NSP3
CCGCAUCUUGGACUUUAAAGUUCUU 1 times at 8638 NSP4 CCGCAUCUUGGACUUUAAAGUUC
CCUGAUGAUAAGUGCUUUGCUAAUA 1 times at 8690 NSP4
GCUUUGCUAAUAAGCACCGGUCCUU 1 times at 8703 NSP4
GCACCGGUCCUUCACACAAUGGUAU 1 times at 8716 NSP4
CCG G U CCU UCACACAAU G G U AUCAU 1 times at 8719 NSP4
GGUGCUCGCAUUCCAGACGUACCUA 1 times at 8816 NSP4
GCUCGCAUUCCAGACGUACCUACUA 1 times at 8819 NSP4
CGCAUUCCAGACGUACCUACUACAU 1 times at 8822 NSP4
GCAUUCCAGACGUACCUACUACAUU 1 times at 8823 NSP4
CCAGACGUACCUACUACAUUGGCUU 1 times at 8828 NSP4
GCAUUCUUCCAUCUGAGUGCACUAU 1 times at 8964 NSP4
GGGCCGUAUGACACCAUACUGCCAU 1 times at 9004 NSP4
CCGUAUGACACCAUACUGCCAUGAU 1 times at 9007 NSP4
CCAUACUGCCAUGAUCCUACUGUUU 1 times at 9017 NSP4
GGCCUCAUGUUCGUUACGACUUGUA 1 times at 9072 NSP4
GCCUCAUGUUCGUUACGACUUGUAU 1 times at 9073 NSP4
CGACUUGUAUGAUGGUAACAUGUUU 1 times at 9088 NSP4
CCACAAAUGGCUCGUGGGCCAUUUU 1 times at 9225 NSP4
GGCCAU U U U U AAU G ACCACCAU CU U 1 times at 9241 NSP4
GCCAUUUUUAAUGACCACCAUCUUA 1 times at 9242 NSP4
CCAU U U U U AAU G ACCACCAUCU U AA 1 times at 9243 NSP4
CCAUCUUAAUAGACCUGGUGUCUAU 1 times at 9259 NSP4
CCUGGUGUCUAUUGUGGCUCUGAUU 1 times at 9272 NSP4
GGUGUCUAUUGUGGCUCUGAUUUUA 1 times at 9275 NSP4
GCAGUAUCACUGUUCCAGCCUAUUA 1 times at 9320 NSP4
CCU AU U ACU U AU U U CCAAU U G ACU A 1 times at 9338 NSP4
CCUCAUUGGUCUUGGGUAUAGGUUU 1 times at 9363 NSP4
CCUGACUUUGCUCUUCUAUUAUAUU 1 times at 9397 NSP4 GCUCUUCUAUUAUAUUAAUAAAGUA 1 times at 9406 NSP4 CUCUUCUAUUAUAUUAAUAAAGU
GCUGUUGUUGCUGCUGUUCUUAAUA 1 times at 9470 NSP4
CCUGCAUUUAUUAUGCAUGUUUCUU 1 times at 9587 NSP4
CCAGGACGCUGCCUCUAAUAUCUUU 1 times at 9760 NSP4
GGACGCUGCCUCUAAUAUCUUUGUU 1 times at 9763 NSP4
CGCUGCCUCUAAUAUCUUUGUUAUU 1 times at 9766 NSP4
GCUGCCUCUAAUAUCUUUGUUAUUA 1 times at 9767 NSP4 UGCCUCUAAUAUCUUUGUUAUUA
CCUCUAAUAUCUUUGUUAUUAACAA 1 times at 9771 NSP4 CUCUAAUAUCUUUGUUAUUAACA
GCAGCUCUUAGAAACUCUUUAACUA 1 times at 9806 NSP4 CAGCUCUUAGAAACUCUUUAACU
CCUAUUCACGAUUUUUGGGGUUGUU 1 times at 9837 NSP4
GGUUGUUUAACAAGUAUAAGUACUU 1 times at 9855 NSP4
GCCGCUUAUCGUGAAGCUGCAGCAU 1 times at 9899 NSP4
GCGAGACUGGUAGUGAUCUUCUUUA 1 times at 9954 NSP4
CCUCUGGCGUGUUGCAAAGCGGUUU 1 times at 10002 NSP4
GCGUGUUGCAAAGCGGUUUGGUGAA 1 times at 10008 NSP4
CGUGUUGCAAAGCGGUUUGGUGAAA 1 times at 10009 NSP4
GGUUACCUGCGGUAGCAUGACUCUU 1 times at 10075 NSP5
CGGUAGCAUGACUCUUAAUGGUCUU 1 times at 10084 NSP5
GGUAGCAUGACUCUUAAUGGUCUUU 1 times at 10085 NSP5
CCUAAUUAUGAUGCCUUGUUGAUUU 1 times at 10172 NSP5
CGCUCCAGCAAACUUGCGUGUUGUU 1 times at 10237 NSP5
GGUCAUGCCAUGCAAGGCACUCUUU 1 times at 10262 NSP5
GGCGCAGCAUUUAGUGUGUUAGCAU 1 times at 10352 NSP5
GCAUUUAGUGUGUUAGCAUGCUAUA 1 times at 10358 NSP5
CCGACUGGUACAUUCACUGUUGUAA 1 times at 10391 NSP5
CGACUGGUACAUUCACUGUUGUAAU 1 times at 10392 NSP5
CGCCCUAACUACACAAUUAAGGGUU 1 times at 10418 NSP5
CCGGUUCAGCAUUUGAUGGUACUAU 1 times at 10545 NSP5
G CACCAAG U U CAG U U AACAG ACAAA 1 times at 10597 NSP5
GCUUGGCUUUACGCAGCAAUACUUA 1 times at 10643 NSP5
GCAGCAAUACUUAAUGGUUGCGCUU 1 times at 10655 NSP5
GGCGUUGCUAUUGAACAGCUGCUUU 1 times at 10793 NSP5
GCGUUGCUAUUGAACAGCUGCUUUA 1 times at 10794 NSP5
CGUUGCUAUUGAACAGCUGCUUUAU 1 times at 10795 NSP5
GGAAGAUGAAUUCACACCUGAGGAU 1 times at 10879 NSP5
CCUGAGGAUGUUAAUAUGCAGAUUA 1 times at 10895 NSP5
GGUUAUGCAGAGUGGUGUGAGAAAA 1 times at 10927 NSP5
GGUGUGAGAAAAGUUACAUAUGGUA 1 times at 10940 NSP6
CGACCCUUGUCUCAACCUAUGUGAU 1 times at 10983 NSP6
CCCUUGUCUCAACCUAUGUGAUAAU 1 times at 10986 NSP6
CCACUAAAUUUACUUUGUGGAACUA 1 times at 11019 NSP6
CCCACACAGUUGUUCCCACUCUUAU 1 times at 11060 NSP6
CCACACAGUUGUUCCCACUCUUAUU 1 times at 11061 NSP6
GGCCUUCGUUAUGUUGUUGGUUAAA 1 times at 11095 NSP6
CGUUAUGUUGUUGGUUAAACACAAA 1 times at 11101 NSP6 GCCUGUGGCUAUUUGUUUGACUUAU 1 times at 11152 NSP6
GCAAACAUAGUCUACGAGCCCACUA 1 times at 11177 NSP6
CGUCAGCGCUGAUUGCAGUUGCAAA 1 times at 11211 NSP6
GCUGAUUGCAGUUGCAAAUUGGCUU 1 times at 11218 NSP6
GGCUUGCCCCCACUAAUGCUUAUAU 1 times at 11238 NSP6
CCCACUAAUGCUUAUAUGCGCACUA 1 times at 11246 NSP6
GGUGUAAUGUGGUUGUACACUUAUA 1 times at 11378 NSP6
GCAUUGGAGAAGCCUCAAGCCCCAU 1 times at 11403 NSP6
CCGGAAGUGAAGAUGAUACUUUUAU 1 times at 11555 NSP6
CGGAAGUGAAGAUGAUACUUUUAUU 1 times at 11556 NSP6 CGGAAGUGAAGAUGAUACUUUUA
GGAAGUGAAGAUGAUACUUUUAUUA 1 times at 11557 NSP6 AAGUGAAGAUGAUACUUUUAUUA
GCUUAGAGCACCUAUGGGUGUCUAU 1 times at 11644 NSP6
GCACCUAUGGGUGUCUAUGACUUUA 1 times at 11651 NSP6
GCUAACAAUCUAACUGCACCUAGAA 1 times at 11708 NSP6
GCACCUAGAAAUUCUUGGGAGGCUA 1 times at 11723 NSP6
GGGAGGCUAUGGCUCUGAACUUUAA 1 times at 11739 NSP6
GGUUGCUGCUAUGCAGUCUAAACUU 1 times at 11797 NSP6
G C AG U C U AAAC UUACAGAUCUU AAA 1 times at 11809 NSP6
CCAACAGUUACACUUAGAGGCUAAU 1 times at 11863 NSP7
GGGCUUUCUGUGUUAAAUGCCAUAA 1 times at 11898 NSP7
GGCUUUCUGUGUUAAAUGCCAUAAU 1 times at 11899 NSP7
GCAGCAACAGACCCCAGUGAGGCUU 1 times at 11933 NSP7
GCUAGUGAUAUUUUUGACACUCCUA 1 times at 12026 NSP7
CCUAGCGUACUUCAAGCUACUCUUU 1 times at 12047 NSP7
GCGCAGAAAGCCUAUCAGGAAGCUA 1 times at 12113 NSP8
CGCAGAAAGCCUAUCAGGAAGCUAU 1 times at 12114 NSP8
GGACUCUGGUGACACCUCACCACAA 1 times at 12139 NSP8
GG U G ACACCU CACCACAAG U U CU U A 1 times at 12146 NSP8
CCUCACCACAAGUUCUUAAGGCUUU 1 times at 12153 NSP8
GGCUUUGCAGAAGGCUGUUAAUAUA 1 times at 12172 NSP8
GCAGAAGGCUGUUAAUAUAGCUAAA 1 times at 12178 NSP8
GCUAAAAACGCCUAUGAGAAGGAUA 1 times at 12197 NSP8
GGAUAAGGCAGUGGCCCGUAAGUUA 1 times at 12217 NSP8
GCAGUGGCCCGUAAGUUAGAACGUA 1 times at 12224 NSP8
GGCUAUGACUUCUAUGUAUAAGCAA 1 times at 12259 NSP8 GGCUAUGACUUCUAUGUAUAAGC
G CAAAAAU UGUCAGUGCUAUG CAAA 1 times at 12305 NSP8
GCUAUGCAAACUAUGUUGUUUGGUA 1 times at 12320 NSP8
GCAAACUAUGUUGUUUGGUAUGAUU 1 times at 12325 NSP8
GCUUCAAAUAAACUUCGCGUUGUAA 1 times at 12434 NSP8
CCGUCUGGAAU CAG G U AG U CACAU A 1 times at 12471 NSP8
CGUCUGGAAUCAGGUAGUCACAUAU 1 times at 12472 NSP8
CCCUCGCUUAACUACGCUGGGGCUU 1 times at 12497 NSP8
CCUCGCUUAACUACGCUGGGGCUUU 1 times at 12498 NSP8
GGGGCUUUGUGGGACAUUACAGUUA 1 times at 12515 NSP8
GGGCUUUGUGGGACAUUACAGUUAU 1 times at 12516 NSP8 GGCUUUGUGGGACAUUACAGUUAUA 1 times at 12517 NSP8
GCUUUGUGGGACAUUACAGUUAUAA 1 times at 12518 NSP8
GGGCAUCCACUUCUGCCGUUAAGUU 1 times at 12630 NSP8
CCACUUCUGCCGUUAAGUUGCAAAA 1 times at 12636 NSP8
CCG U U AAG U U G C AAAAU AAU G AG AU 1 times at 12645 NSP8
GGUCAAGAGCAAACUAACUGUAAUA 1 times at 12707 NSP9
GGGUCGUAAAAUGCUGAUGGCUCUU 1 times at 12763 NSP9
CGUAAAAUGCUGAUGGCUCUUCUUU 1 times at 12767 NSP9
GCUGAUGGCUCUUCUUUCUGAUAAU 1 times at 12775 NSP9
GGCUCUUCUUUCUGAUAAUGCCUAU 1 times at 12781 NSP9
GCGCGUGUUGAAGGUAAGGACGGAU 1 times at 12815 NSP9
CGCGUGUUGAAGGUAAGGACGGAUU 1 times at 12816 NSP9
GCGUGUUGAAGGUAAGGACGGAUUU 1 times at 12817 NSP9
GCAAAUUCUUGAUUGCGGGACCAAA 1 times at 12867 NSP9
GGACCAAAAGGACCUGAAAUCCGAU 1 times at 12884 NSP9
GGGCACAUUGCUGCGACUGUUAGAU 1 times at 12959 NSP9
GGCACAUUGCUGCGACUGUUAGAUU 1 times at 12960 NSP9
GCGACUGUUAGAUUGCAAGCUGGUU 1 times at 12971 NSP9
GCAAGCUGGUUCUAACACCGAGUUU 1 times at 12985 NSP9
GGUUCUAACACCGAGUUUGCCUCUA 1 times at 12992 NSP10
CCUAAAACUGGUACAGGUAUAGCUA 1 times at 13127 NSP10
GGUACAGGUAUAGCUAUAUCUGUUA 1 times at 13136 NSP10 UACAGGUAUAGCUAUAUCUGUUA
GCUAUAUCUGUUAAACCAGAGAGUA 1 times at 13148 NSP10
CCGUGCGCAUAUAGAACAUCCUGAU 1 times at 13219 NSP10
CCUGUAAUGUCUGUCAAUAUUGGAU 1 times at 13335 NSP10
GCCCCAAUCUAAAGAUUCCAAUUUU 1 times at 13402 NSP10
CCCCAAU CU AAAG AU U CCAAU U U U U 1 times at 13403 NSP10 CCCCAAU CU AAAG AU U CCAAU U U
CCCAAUCUAAAGAUUCCAAUUUUUU 1 times at 13404 NSP10 CCCAAUCU AAAG AU U CCAAU U U U
CCAAUCUAAAGAUUCCAAUUUUUUA 1 times at 13405 NSP10
CGGGGUUCUAUUGUAAAUGCCCGAA 1 times at 13438 NSP12
GGGGUUCUAUUGUAAAUGCCCGAAU 1 times at 13439 NSP12
GGGUUCUAUUGUAAAUGCCCGAAUA 1 times at 13440 NSP12
CG AAU AG AACCCU G U U CAAGUGG U U 1 times at 13459 NSP12
GGGCAUUUGACAUCUGCAACUAUAA 1 times at 13505 NSP12
GGCUAAGGUUGCUGGUAUUGGAAAA 1 times at 13530 NSP12
GCUAAGGUUGCUGGUAUUGG AAAAU 1 times at 13531 NSP12
GGUAUUGGAAAAUACUACAAGACUA 1 times at 13543 NSP12
GGAAAAUACUACAAGACUAAUACUU 1 times at 13549 NSP12
CCAAGGGCAUCAUUUAGACUCCUAU 1 times at 13596 NSP12
CGUUAAGAGGCAUACUAUGGAGAAU 1 times at 13626 NSP12
GCAUACUAUGGAGAAUUAUGAACUA 1 times at 13635 NSP12
CCAUGAUUUCUUCAUCUUUGAUGUA 1 times at 13707 NSP12
CCUCAUAUUGUACGUCAGCGUUUAA 1 times at 13747 NSP12
CGUCAGCGUUUAACUGAGUACACUA 1 times at 13759 NSP12
GCCCUGAGGCACUUUGAUCAAAAUA 1 times at 13801 NSP12 GCUUAAGGCUAUCUUAGUGAAGUAU 1 times at 13833 NSP12
GCUGUGAUGUUACCUACUUUGAAAA 1 times at 13862 NSP12 CUGUGAUGUUACCUACUUUGAAA
CCUACUUUGAAAAUAAACUCUGGUU 1 times at 13874 NSP12
CCCAGUGUUAUUGGUGUUUAUCAUA 1 times at 13915 NSP12 CCCAGUGUUAUUGGUGUUUAUCA
CCAGUGUUAUUGGUGUUUAUCAUAA 1 times at 13916 NSP12 CAGUGUUAUUGGUGUUUAUCAUA
CGCCAAGCUAUCUUAAACACUGUUA 1 times at 13957 NSP12
GCCAAGCUAUCUUAAACACUGUUAA 1 times at 13958 NSP12
CCAAGCUAUCUUAAACACUGUUAAA 1 times at 13959 NSP12
GCUAUCUUAAACACUGUUAAAUUUU 1 times at 13963 NSP12
GCUCACACUAGACAACCAGGACCUU 1 times at 14022 NSP12
CCAGGACCUUAAUGGCAAGUGGUAU 1 times at 14037 NSP12
GGACCUUAAUGGCAAGUGGUAUGAU 1 times at 14040 NSP12
CCUUAAUGGCAAGUGGUAUGAUUUU 1 times at 14043 NSP12
GCAAGUGGUAUGAUUUUGGUGACUU 1 times at 14051 NSP12
GGUAUGAUUUUGGUGACUUCGUAAU 1 times at 14057 NSP12
GGUUCAGGAGUAGCUAUAGUUGAUA 1 times at 14092 NSP12
GCUAUAGUUGAUAGCUACUAUUCUU 1 times at 14104 NSP12
CGAUUGUCUGGCCGCUGAGACACAU 1 times at 14154 NSP12
CGCUGAGACACAUAGGGAUUGUGAU 1 times at 14166 NSP12
GCUGAGACACAUAGGGAUUGUGAUU 1 times at 14167 NSP12
GGUACAACUCUUUGAGAAGUACUUU 1 times at 14247 NSP12 UACAACUCUUUGAGAAGUACUUU
CGCAAAUUGCGUUAAUUGUACUGAU 1 times at 14295 NSP12
CCGUUGUGUGUUACAUUGUGCUAAU 1 times at 14322 NSP12
CGUUGUGUGUUACAUUGUGCUAAUU 1 times at 14323 NSP12
GCUAAUUUCAAUGUAUUGUUUGCUA 1 times at 14341 NSP12
GCCUAAGACUUGUUUCGGACCCAUA 1 times at 14373 NSP12
CGGACCCAUAGUCCGAAAGAUCUUU 1 times at 14388 NSP12
GCCAUUUGUAGUAUCUUGUGGUUAU 1 times at 14424 NSP12
GGUUAUCACUACAAAGAAUUAGGUU 1 times at 14443 NSP12
GGUUUAGUCAUGAAUAUGGAUGUUA 1 times at 14464 NSP12
CCAGCCAUGCACAUUGCCUCCUCUA 1 times at 14542 NSP12
GCACAUUGCCUCCUCUAACGCUUUU 1 times at 14550 NSP12
GCCUCCUCUAACGCUUUUCUUGAUU 1 times at 14557 NSP12
CCUCCUCUAACGCUUUUCUUGAUUU 1 times at 14558 NSP12 CUCCUCUAACGCUUUUCUUGAUU
GCUUUUCUUGAUUUGAGGACAUCAU 1 times at 14569 NSP12
GCUGCACUUACAACUGGUUUGACUU 1 times at 14605 NSP12
GGCCUGGCAAUUUUAACCAAGACUU 1 times at 14642 NSP12
CCAAGACUUCUAUGAUUUCGUGGUA 1 times at 14658 NSP12
GCUCAAACAUUUUUUCUUUGCUCAA 1 times at 14718 NSP12
GCUCAAGAUGGUAAUGCUGCUAUUA 1 times at 14737 NSP12
GGUAAUGCUGCUAUUACAGAUUAUA 1 times at 14746 NSP12
GCUAUUACAGAUUAUAAUUACUAUU 1 times at 14755 NSP12
GCCUACUAUGUGUGACAUCAAACAA 1 times at 14790 NSP12
CCUACUAUGUGUGACAU C A AAC AAA 1 times at 14791 NSP12 UACUAUGUGUG ACAU CAAAC AAA
GCAUGGAAGUUGUAAACAAGUACUU 1 times at 14825 NSP12 GGAAGUUGUAAACAAGUACUUCGAA 1 times at 14829 NSP12
CGAAAUCUAUGACGGUGGUUGUCUU 1 times at 14850 NSP12
CGGUGGUUGUCUUAAUGCUUCUGAA 1 times at 14862 NSP12
GCUUCUGAAGUGGUUGUUAAUAAUU 1 times at 14878 NSP12
GCCAUCCUUUUAAUAAGUUUGGCAA 1 times at 14918 NSP12
CCAUCCUUUUAAUAAGUUUGGCAAA 1 times at 14919 NSP12
CGUGUCUAUUAUGAGAGCAUGUCUU 1 times at 14947 NSP12
GCAGGCGUGUCCAUACUUAG CACAA 1 times at 15082 NSP12
CGCCAGUACCAUCAGAAAAUGCUUA 1 times at 15115 NSP12
G CC AG U ACCAU CAG AAAAU G CU U AA 1 times at 15116 NSP12
CGUGGAGCGACUUGCGUCAUUGGUA 1 times at 15157 NSP12
GGAGCGACUUGCGUCAUUGGUACUA 1 times at 15160 NSP12
GCGACUUGCGUCAUUGGUACUACAA 1 times at 15163 NSP12
CGACUUGCGUCAUUGGUACUACAAA 1 times at 15164 NSP12
GCGUCAUUGGUACUACAAAGUUCUA 1 times at 15170 NSP12
GGUGGCUGGGAUUUCAUGCUUAAAA 1 times at 15196 NSP12
GGCUGGGAUUUCAUGCUUAAAACAU 1 times at 15199 NSP12
GCUGGGAUUUCAUGCUUAAAACAUU 1 times at 15200 NSP12 UGGGAUUUCAUGCUUAAAACAUU
GGGAUUUCAUGCUUAAAACAUUGUA 1 times at 15203 NSP12 GGGAUUUCAUGCUUAAAACAUUG
GGGUUGGGAUUACCCUAAGUGUGAU 1 times at 15255 NSP12
GGUUGGGAUUACCCUAAGUGUGAUA 1 times at 15256 NSP12
CCUAAGUGUGAUAGAGCUAUGCCUA 1 times at 15268 NSP12
CCUAAUAUGUGUAGAAUCUUCGCUU 1 times at 15289 NSP12
CGCUUCACUCAUAUUAGCUCGUAAA 1 times at 15309 NSP12
GGGACAGAUUUUAUCGCUUGGCAAA 1 times at 15356 NSP12
GGACAGAUUUUAUCGCUUGGCAAAU 1 times at 15357 NSP12
GGCAAAUGAGUGUGCUCAGGUGCUA 1 times at 15375 NSP12
GCAAAUGAGUGUGCUCAGGUGCUAA 1 times at 15376 NSP12
GGUUACUACGUCAAACCUGGAGGUA 1 times at 15424 NSP12
CCACUGCAUAUGCCAAUAGUGUCUU 1 times at 15467 NSP12 CACUGCAUAUGCCAAUAGUGUCU
GGGUGCUAAUGGCAACAAGAUUGUU 1 times at 15534 NSP12 GGGUGCUAAUGGCAACAAGAUUG
GGAGCACUAGCCCAGACCCCAAAUU 1 times at 15608 NSP12
GCCCAGACCCCAAAUUUGUUGAUAA 1 times at 15617 NSP12
CCCAG ACCCCAAAU U UG U U G AU AAA 1 times at 15618 NSP12
CCAGACCCCAAAUUUGUUGAUAAAU 1 times at 15619 NSP12
CCCCAAAUUUGUUGAUAAAUACUAU 1 times at 15624 NSP12 CCCCAAAUUUGUUGAUAAAUACU
GCUUUUCUUAAUAAGCACUUUUCUA 1 times at 15649 NSP12
CGGUGUCGUUUGCUAUAAUAGUGAU 1 times at 15693 NSP12
GGUGUCGUUUGCUAUAAUAGUGAUU 1 times at 15694 NSP12
GCUAUAAUAGUGAUUAUGCAGCUAA 1 times at 15704 NSP12
GCAGCUAAGGGUUACAUUGCUGGAA 1 times at 15721 NSP12
GGGUUACAUUGCUGGAAUACAGAAU 1 times at 15729 NSP12
GGUUACAUUGCUGGAAUACAGAAUU 1 times at 15730 NSP12
GGAAACGCUGUAUUAUCAGAACAAU 1 times at 15759 NSP12
CGCUGUAUUAUCAGAACAAUGUCUU 1 times at 15764 NSP12 GCUGUAUUAUCAGAACAAUGUCUUU 1 times at 15765 NSP12
GCUGGGUGGAAACCGAUCUGAAGAA 1 times at 15806 NSP12
CGAUCUGAAGAAAGGGCCACAUGAA 1 times at 15819 NSP12
G CC ACAU G AAU U CU G U U CACAG C AU 1 times at 15834 NSP12
CCACAUGAAUUCUGUUCACAGCAUA 1 times at 15835 NSP12
GCUUUAUAUUAAGGAUGGCGACGAU 1 times at 15861 NSP12
GGAUGGCGACGAUGGUUACUUCCUU 1 times at 15873 NSP12
GGCGACGAUGGUUACUUCCUUCCUU 1 times at 15877 NSP12
GCGACGAUGGUUACUUCCUUCCUUA 1 times at 15878 NSP12
CGACGAUGGUUACUUCCUUCCUUAU 1 times at 15879 NSP12
CCU U AU CCAG ACCCU U CAAG AAU U U 1 times at 15898 NSP12
CCUUCAAGAAUUUUGUCUGCCGGUU 1 times at 15910 NSP12
CGGUUGCUUUGUAGAUGAUAUCGUU 1 times at 15930 NSP12 CGGUUGCUUUGUAGAUGAUAUCG
GGUUGCUUUGUAGAUGAUAUCGUUA 1 times at 15931 NSP12 UUGCUUUGUAGAUGAUAUCGUUA
GCGGUUUGUGUCUUUGGCUAUAGAU 1 times at 15981 NSP12
GCUAUAGAUGCUUACCCUCUCACAA 1 times at 15997 NSP12
CCC U C U C AC AAAG CAU G AAG AU AU A 1 times at 16011 NSP12 CUCUCACAAAGCAUGAAGAUAUA
GCAUGAAGAUAUAGAAUACCAGAAU 1 times at 16023 NSP12
CCAGAAUGUAUUCUGGGUCUACUUA 1 times at 16041 NSP12
GGGUCUACUUACAGUAUAUAGAAAA 1 times at 16055 NSP12
GGUCUACUUACAGUAUAUAGAAAAA 1 times at 16056 NSP12 GUCUACUUACAGUAUAUAGAAAA
GCUUGACAGUUAUUCUGUCAUGCUA 1 times at 16107 NSP12
CCUACCACUUUGCAGGCUGUCGGUU 1 times at 16192 NSP12
GCAGGCUGUCGGUUCAUGCGUUGUA 1 times at 16203 NSP12
CCACAUAAGAUGGUUUUGUCUGUUU 1 times at 16318 NSP13
CCACUUUGCGCUAAUGGUCUUGUAU 1 times at 16450 NSP13
GCGCUAAUGGUCUUGUAUUCGGCUU 1 times at 16457 NSP13
CGCUAAUGGUCUUGUAUUCGGCUUA 1 times at 16458 NSP13
GCUAAUGGUCUUGUAUUCGGCUUAU 1 times at 16459 NSP13
GGUGAUUACACCCUUGCCAAUACUA 1 times at 16558 NSP13
CCAAUACUACAACAGAACCACUCAA 1 times at 16574 NSP13
CCACCACU CAAU CG U AAU U AU G U U U 1 times at 16726 NSP13 ACCACUCAAUCGUAAUUAUGUUU
CCACUCAAUCGUAAUUAUGUUUUUA 1 times at 16729 NSP13
GGUUAUCAU AU AACCAAAAAU AG U A 1 times at 16756 NSP13
GCGCAUUGAUUAUAGUGAUGCUGUA 1 times at 16809 NSP13
CGCAUUGAUUAUAGUGAUGCUGUAU 1 times at 16810 NSP13
GCUGUAUCCUACAAGUCUAGUACAA 1 times at 16828 NSP13
CCUACAAGUCUAGUACAACGUAUAA 1 times at 16835 NSP13 U ACAAG U CU AG U ACAACG U AU AA
CGUAUAAACUGACUGUAGGUGACAU 1 times at 16853 NSP13
GGCUACCUUGACGGCGCCCACAAUU 1 times at 16902 NSP13
GGUAUGUUAAAAUUACUGGGUUGUA 1 times at 16940 NSP13
G CC AACU U CCAAAAAU CAG G U U AU A 1 times at 17005 NSP13
CCAAAAAU CAG G U U AU AG U AAAU AU 1 times at 17013 NSP13
GCACGUGUUGUUUAUACAGCAUGUU 1 times at 17110 NSP13
CGCAGCUGUUGAUGCUUUGUGUGAA 1 times at 17139 NSP13 GCAGCUGUUGAUGCUUUGUGUGAAA 1 times at 17140 NSP13
GCUUUGUGUGAAAAAGCUUUUAAAU 1 times at 17152 NSP13
GCUUUUAAAUAUUUGAACAUUGCUA 1 times at 17167 NSP13
CGUGUUGAGUGCUAUGACAGGUUUA 1 times at 17221 NSP13
GGUUAGUAUGUGCACUAAUUAUGAU 1 times at 17331 NSP13
GCACUAAUUAUGAUCUUUCAAUUAU 1 times at 17342 NSP13 CACUAAUUAUGAUCUUUCAAUUA
GCACAGUUGCCAGCUCCUAGGACUU 1 times at 17413 NSP13
CCAGCUCCUAGGACUUUGUUGACUA 1 times at 17422 NSP13
GGACUUUGUUGACUAGAGGCACAUU 1 times at 17432 NSP13
GCACUGUGAGCGCUCUUGUCUACAA 1 times at 17555 NSP13
GCGCUCUUGUCUACAAUAAUAAAUU 1 times at 17564 NSP13
GCUUUAAAAUACUCUAUAAGGGCAA 1 times at 17618 NSP13
CGCAUGAUGCUAGCUCUGCCAUUAA 1 times at 17648 NSP13
GCAUGAUGCUAGCUCUGCCAUUAAU 1 times at 17649 NSP13
GCCAUUAAUAGACCACAACUCACAU 1 times at 17665 NSP13
CCAU U AAU AGACCACAACUCACAU U 1 times at 17666 NSP13
CCACAACU CACAU U U G U G AAG AAU U 1 times at 17677 NSP13
CCGGCAUGGAGUAAGGCAGUCUUUA 1 times at 17716 NSP13
CGGCAUGGAGUAAGGCAGUCUUUAU 1 times at 17717 NSP13
GGCAUGGAGUAAGGCAGUCUUUAUU 1 times at 17718 NSP13
GCAUGGAGUAAGGCAGUCUUUAUUU 1 times at 17719 NSP13 AUGGAGUAAGGCAGUCUUUAUUU
CCU CACAG G G U U CAG AAU ACCAG U A 1 times at 17810 NSP13
GCACAUGCUAACAACAUUAACAGAU 1 times at 17863 NSP13 CACAUGCUAACAACAUUAACAGA
G CAAU CACU CG U G CCCAAAAAG G U A 1 times at 17896 NSP13
GCCCAAAAAGGUAUUCUUUGUGUUA 1 times at 17908 NSP13 GCCCAAAAAGGUAUUCUUUGUGU
CCCAAAAAGGUAUUCUUUGUGUUAU 1 times at 17909 NSP13
GGCACUCUUUGAGUCCUUAGAGUUU 1 times at 17943 NSP13
GCACUCUUUGAGUCCUUAGAGUUUA 1 times at 17944 NSP13 CACUCUUUGAGUCCUUAGAGUUU
CCUUAGAGUUUACUGAAUUGUCUUU 1 times at 17957 NSP13
CCUUUUUAAAGAUUGCUCUAGAGAA 1 times at 18018 NSP14
GGCCUCUCACCUGCUUAUGCACCAA 1 times at 18049 NSP14
GCGUGAAUCUUAAUUUACCCGCAAA 1 times at 18119 NSP14
CGUGAAUCUUAAUUUACCCGCAAAU 1 times at 18120 NSP14
CGCAAAUGUCCCAUACUCUCGUGUU 1 times at 18138 NSP14
GCAAAUGUCCCAUACUCUCGUGUUA 1 times at 18139 NSP14
CGUGUUAUUUCCAGGAUGGGCUUUA 1 times at 18157 NSP14
GGGCUUUAAACUCGAUGCAACAGUU 1 times at 18174 NSP14
GGCAAGUUCGAAGCUGGAUAGGCUU 1 times at 18242 NSP14
GGUGCUCAUGCUUCCCGUAAUGCAU 1 times at 18277 NSP14
CCAAUGUGCCUCUACAAUUAGGAUU 1 times at 18308 NSP14
GGUGUUGUAGACACUGAGUGGGGUA 1 times at 18367 NSP14
CG U CCU CCACCAG G UGAACAG U U U A 1 times at 18415 NSP14
CGUUUGUUUGUUGGGCUCAUGGCUU 1 times at 18545 NSP14
GGCUUUGAAUUAACGUCUGCAUCAU 1 times at 18565 NSP14
GCUUUGAAUUAACGUCUGCAUCAUA 1 times at 18566 NSP14 CGUCUGCAUCAUACUUUUGCAAGAU 1 times at 18578 NSP14
GCAUCAUACUUUUGCAAGAUAGGUA 1 times at 18583 NSP14
GCAGCGUACUCUUCACCUCUGCAAU 1 times at 18643 NSP14
GCGUACUCUUCACCUCUGCAAUCUU 1 times at 18646 NSP14
CGUACUCUUCACCUCUGCAAUCUUA 1 times at 18647 NSP14
GCAAUCUUAUGCCUGCUGGACUCAU 1 times at 18663 NSP14
GCCUGCUGGACUCAUUCCUGCGGUU 1 times at 18673 NSP14
CCUGCUGGACUCAUUCCUGCGGUUA 1 times at 18674 NSP14
GGACUCAUUCCUGCGGUUAUGAUUA 1 times at 18680 NSP14
CCUGCGGUUAUGAUUAUGUCUACAA 1 times at 18689 NSP14 CUGCGGUUAUGAUUAUGUCUACA
GGUUAUGAUUAUGUCUACAACCCUU 1 times at 18694 NSP14
CGAUGUUCAACAGUGGGGUUAUGUA 1 times at 18726 NSP14
CGAUCGUUAUUGCUCUGUCCAUCAA 1 times at 18771 NSP14
GCUCAUGUGGCUUCUAAUGAUGCAA 1 times at 18799 NSP14
GCAAUAAUGACUCGUUGUUUAGCUA 1 times at 18820 NSP14
CGUUGUUUAGCUAUUCAUUCUUGUU 1 times at 18832 NSP14
CCUUAUAUCUCACAUGAAAAGAAAU 1 times at 18889 NSP14
GCGCAACGUCGUACGUGCUGCUCUU 1 times at 18939 NSP14
CGGUUCAUUUGACAAAGUCUAUGAU 1 times at 18969 NSP14 CGGUUCAUUUGACAAAGUCUAUG
GGUUCAUUUGACAAAGUCUAUGAUA 1 times at 18970 NSP14 UUCAUUUGACAAAGUCUAUGAUA
GGCAUUAUUUUGAUGCACAGCCCUU 1 times at 19043 NSP14
GGACAUGGCCUCAAGAUUUGCUGAU 1 times at 19101 NSP14
GCACGCUUUUCAUACACCAGCAUAU 1 times at 19257 NSP14
CGCUUUUCAUACACCAGCAUAUGAU 1 times at 19260 NSP14
CCUUUACCAUUCUUUUAUUAUUCUA 1 times at 19309 NSP14
GGUAAUGGUAGUAUGAUAGAGGAUA 1 times at 19354 NSP14
GGUAGUAUGAUAGAGGAUAUUGAUU 1 times at 19360 NSP14 UAGUAUGAUAGAGGAUAUUGAUU
GGAUAUUGAUUAUGUACCCCUAAAA 1 times at 19374 NSP14
CCCCUAAAAUCUGCAGUCUGUAUUA 1 times at 19390 NSP14
GGUGUUAUAAGACCUUUGAUAUUUA 1 times at 19517 NSP14 GUGUUAUAAGACCUUUGAUAUUU
CCAUUUUAUUGGUGUUGAGGGUGAA 1 times at 19611 NSP15
CCACUUUGCCUACUAAUAUAGCUUU 1 times at 19712 NSP15
GCGUGCUGUACGCUCGCAUCCCGAU 1 times at 19752 NSP15
CGUGCUGUACGCUCGCAUCCCGAUU 1 times at 19753 NSP15
CCCGAUUUCAAAUUGCUACACAAUU 1 times at 19771 NSP15
CCGAUUUCAAAUUGCUACACAAUUU 1 times at 19772 NSP15
CGAUUUCAAAUUGCUACACAAUUUA 1 times at 19773 NSP15
G CU ACACAAU U U ACAAG CAG ACAU U 1 times at 19785 NSP15
GCUACAAGUUCGUCCUUUGGGAUUA 1 times at 19811 NSP15
CCUUUGGGAUUAUGAACGUAGCAAU 1 times at 19824 NSP15
GGGAUUAUGAACGUAGCAAUAUUUA 1 times at 19829 NSP15 GGGAUUAUGAACGUAGCAAUAUU
GGAUUAUGAACGUAGCAAUAUUUAU 1 times at 19830 NSP15
CGUAGCAAUAUUUAUGGUACUGCUA 1 times at 19840 NSP15
GCAAUAUUUAUGGUACUGCUACUAU 1 times at 19844 NSP15
CCCAAUGCCAUCUUUAUUUCUGAUA 1 times at 19966 NSP15 GCCAUCUUUAUUUCUGAUAGAAAAA 1 times at 19972 NSP15 GCCAUCUUUAUUUCUGAUAGAAA
CCAU CU U U AU U U CU G AU AG AAAAAU 1 times at 19973 NSP15 AUCUUUAUUUCUGAUAGAAAAAU
CCCUUGUAUGGUAGGUCCUGAUUAU 1 times at 20007 NSP15
CCGUGAUAGUGAUGUUGUUAAACAA 1 times at 20055 NSP15 CCGUGAUAGUGAUGUUGUUAAAC
GGAAAACUAUGCUUUUGAGCACGUA 1 times at 20244 NSP15
CGUUAGGCGGUCUUCACUUGCUUAU 1 times at 20294 NSP15
GGCGGUCUUCACUUGCUUAUUGGUU 1 times at 20299 NSP15
GCGGUCUUCACUUGCUUAUUGGUUU 1 times at 20300 NSP15
CGGUCUUCACUUGCUUAUUGGUUUA 1 times at 20301 NSP15
GGUCUUCACUUGCUUAUUGGUUUAU 1 times at 20302 NSP15 GUCUUCACUUGCUUAUUGGUUUA
GCUUAUUGGUUUAUACAAGAAGCAA 1 times at 20313 NSP15
GGAAGGUCAUAUUAUUAUGGAAGAA 1 times at 20340 NSP15
GCUAAAAGGUAGCUCAACUAUUCAU 1 times at 20367 NSP15
GGUAGCUCAACUAUUCAUAACUAUU 1 times at 20374 NSP15
GCUCAACUAUUCAUAACUAUUUUAU 1 times at 20378 NSP15 CUCAACUAUUCAUAACUAUUUUA
GGCUUUUAAGGCGGUGUGUUCUGUU 1 times at 20421 NSP15
GCUUUUAAGGCGGUGUGUUCUGUUA 1 times at 20422 NSP15
GGCGGUGUGUUCUGUUAUAGAUUUA 1 times at 20430 NSP15
GCGGUGUGUUCUGUUAUAGAUUUAA 1 times at 20431 NSP15
CGGUGUGUUCUGUUAUAGAUUUAAA 1 times at 20432 NSP15
GCUUGACGACUUUGUUAUGAUUUUA 1 times at 20457 NSP15
CGUAGUAUCCAAGGUUGUCAAGGUU 1 times at 20499 NSP15
GGUUGUCAAGGUUCCUAUUGACUUA 1 times at 20511 NSP15
GGUUCCUAUUGACUUAACAAUGAUU 1 times at 20520 NSP15 UUCCUAUUGACUUAACAAUGAUU
CCCUCGACUCCAGGCUUCUGCAGAU 1 times at 20589 NSP15
CCUCGACUCCAGGCUUCUGCAGAUU 1 times at 20590 NSP15
GCCAUCCCUCUUUAAAGUUCAAAAU 1 times at 20634 NSP16
CCCUCUUUAAAGUUCAAAAUGUAAA 1 times at 20639 NSP16 CU CU UUAAAG U U CAAAAU G U AAA
CGCGGUGUGCACAUGAACAUCGCUA 1 times at 20713 NSP16
GCGGUGUGCACAUGAACAUCGCUAA 1 times at 20714 NSP16
CGGUGUGCACAUGAACAUCGCUAAA 1 times at 20715 NSP16
GGUGUGCACAUGAACAUCGCUAAAU 1 times at 20716 NSP16
GCCAGU AU U UAAAUACU UGCACAU U 1 times at 20753 NSP16
CCAGUAUUUAAAUACUUGCACAUUA 1 times at 20754 NSP16
GCCUGCCAAUAUGCGUGUUAUACAU 1 times at 20784 NSP16
CCUGCCAAUAUGCGUGUUAUACAUU 1 times at 20785 NSP16 UGCCAAUAUGCGUGUUAUACAUU
CGUGUUAUACAUUUUGGCGCUGGUU 1 times at 20797 NSP16
GCCAUUAUUAUAGAUAAUGAUUUAA 1 times at 20878 NSP16
CCAU U AU U AUAG AUAAUGAUU U AAA 1 times at 20879 NSP16
CGUGUCAGAUGCUGACAUAACUUUA 1 times at 20910 NSP16
GCUGACAUAACUUUAUUUGGAGAUU 1 times at 20920 NSP16
CCGACAUGUAUGAUCCUACUACUAA 1 times at 20987 NSP16 GACAUGUAUGAUCCUACUACUAA
CCUACUACUAAGAAUGUAACAGGUA 1 times at 21001 NSP16
GGUAGUAAUGAGUCAAAGGCUUUAU 1 times at 21022 NSP16
GCUUUAUUCUUUACUUACCUGUGUA 1 times at 21040 NSP16 CCUGUGUAACCUCAUUAAUAAUAAU 1 times at 21057 NSP16
GGUGGGUCUGUUGCUAUUAAAAUAA 1 times at 21091 NSP16
G C U AU U AAAAU AACAGAACACUCUU 1 times at 21103 NSP16
GGAGCGUUGAACUUUAUGAACUUAU 1 times at 21128 NSP16 GAGCGUUGAACUUUAUGAACUUA
GGGAAAAUUUGCUUGGUGGACUGUU 1 times at 21153 NSP16
GGAAAAUUUGCUUGGUGGACUGUUU 1 times at 21154 NSP16
GCAAAUGCAUCCUCAUCUGAAGGAU 1 times at 21190 NSP16
GGUAUUAAUUACUUGGGUACUAUUA 1 times at 21223 NSP16
GGGUACUAUUAAAG AAAAU AUAGAU 1 times at 21237 NSP16 GGGUACUAUUAAAG AAAAU AU AG
GGUGGUGCUAUGCACGCCAACUAUA 1 times at 21262 NSP16
GGUGCUAUGCACGCCAACUAUAUAU 1 times at 21265 NSP16
GCUAUGCACGCCAACUAUAUAUUUU 1 times at 21268 NSP16
CGCCAACUAUAUAUUUUGGAGAAAU 1 times at 21276 NSP16
GCCAACUAUAUAUUUUGGAGAAAUU 1 times at 21277 NSP16
CCACUCCUAUGAAUCUGAGUACUUA 1 times at 21302 NSP16
G G AG AG U CAAAU U AACG AACU CG U A 1 times at 21390 NSP16
GGGUAAGUUACUUAUCCGUGACAAU 1 times at 21432 NSP16
CCGUGACAAUGAUACACUCAGUGUU 1 times at 21447 NSP16
CG U G ACAAU G AU ACACU CAG U G U U U 1 times at 21448 NSP16
GGCUGACGGUAUUAUAUACCCUCAA 1 times at 21610 S protein
GGUAUUAUAUACCCUCAAGGCCGUA 1 times at 21617 S protein
GGCCGUACAUAUUCUAACAUAACUA 1 times at 21635 S protein GGCCGUACAUAUUCUAACAUAAC
GCCGUACAUAUUCUAACAUAACUAU 1 times at 21636 S protein GCCGUACAUAUUCUAACAUAACU
CCCUAUCAGGGAGACCAUGGUGAUA 1 times at 21680 S protein
CCUAUCAGGGAGACCAUGGUGAUAU 1 times at 21681 S protein
GGGAGACCAUGGUGAUAUGUAUGUU 1 times at 21688 S protein CACUUUACUUAGAGCUUUUUAUU
GGAGACCAUGGUGAUAUGUAUGUUU 1 times at 21689 S protein
CCAUCUACCAGCGCUACUAUACGAA 1 times at 21854 S protein
CCAGCGCUACUAUACGAAAAAUUUA 1 times at 21861 S protein
GGGCCGCUUCUUCAAUCAUACUCUA 1 times at 21937 S protein
GCCCGAUGGAUGUGGCACUUUACUU 1 times at 21970 S protein
CCCGAUGGAUGUGGCACUUUACUUA 1 times at 21971 S protein
GGAUGUGGCACUUUACUUAGAGCUU 1 times at 21977 S protein
GGCACUUUACUUAGAGCUUUUUAUU 1 times at 21983 S protein
CCUGCUGGCAAUUCCUAUACUUCUU 1 times at 22040 S protein
GCAACAGAUUGUUCUGAUGGCAAUU 1 times at 22085 S protein
CGUAAUGCCAGUCUGAACUCUUUUA 1 times at 22115 S protein
CCAGUCUGAACUCUUUUAAGGAGUA 1 times at 22122 S protein
CGUAACUGCACCUUUAUGUACACUU 1 times at 22157 S protein
GCACCUUUAUGUACACUUAUAACAU 1 times at 22164 S protein CACCUUUAUGUACACUUAUAACA
CCGAAGAUGAGAUUUUAGAGUGGUU 1 times at 22191 S protein CCGAAGAUGAGAUUUUAGAGUGG
CGAAGAUGAGAUUUUAGAGUGGUUU 1 times at 22192 S protein
GCUCAAGGUGUUCACCUCUUCUCAU 1 times at 22232 S protein
CCUCUUCUCAUCUCGGUAUGUUGAU 1 times at 22246 S protein
GGUAUGUUGAUUUGUACGGCGGCAA 1 times at 22260 S protein CCGUUAACUUUCCUGUUGGAUUUUU 1 times at 22412 S protein
GGAUUUUUCUGUUGAUGGUUAUAUA 1 times at 22429 S protein
CGCAGAGCUAUAGACUGUGGUUUUA 1 times at 22454 S protein
GCAGAGCUAUAGACUGUGGUUUUAA 1 times at 22455 S protein
GCUAUAGACUGUGGUUUUAAUGAUU 1 times at 22460 S protein
CCACUGCUCAUAUGAAUCCUUCGAU 1 times at 22495 S protein
CCUUCGAUGUUGAAUCUGGAGUUUA 1 times at 22512 S protein
CGAAGCAAAACCUUCUGGCUCAGUU 1 times at 22552 S protein
GGCUGAAGGUGUUGAAUGUGAUUUU 1 times at 22585 S protein
GCUGAAGGUGUUGAAUGUGAUUUUU 1 times at 22586 S protein
GGCACACCUCCUCAGGUUUAUAAUU 1 times at 22625 S protein
GCACACCU CCU CAG G U U U AU AAU U U 1 times at 22626 S protein
CCUCAGGUUUAUAAUUUCAAGCGUU 1 times at 22634 S protein
GGUUUAUAAUUUCAAGCGUUUGGUU 1 times at 22639 S protein
GCGUUUGGUUUUUACCAAUUGCAAU 1 times at 22654 S protein
CGUUUGGUUUUUACCAAUUGCAAUU 1 times at 22655 S protein
GGUUUUUACCAAUUGCAAUUAUAAU 1 times at 22660 S protein
GCUUUCACUUUUUUCUGUGAAUGAU 1 times at 22696 S protein
GCUGGUCCAAUAUCCCAGUUUAAUU 1 times at 22835 S protein
GGUCCAAUAUCCCAGUUUAAUUAUA 1 times at 22838 S protein UG G U CCAAU AU CCCAG U U U AAU U
CCCAGUUUAAUUAUAAACAGUCCUU 1 times at 22848 S protein CCCAGUUUAAUUAUAAACAGUCC
CCAGUUUAAUUAUAAACAGUCCUUU 1 times at 22849 S protein
CCUUUUCUAAUCCCACAUGUUUGAU 1 times at 22869 S protein
CCUUACUACUAUUACUAAGCCUCUU 1 times at 22915 S protein
CCUCAGUUAGUGAACGCUAAUCAAU 1 times at 22997 S protein
CGCUAAUCAAUACUCACCCUGUGUA 1 times at 23011 S protein
GCUAAUCAAUACUCACCCUGUGUAU 1 times at 23012 S protein
GGGAAGACGGUGAUUAUUAUAGGAA 1 times at 23058 S protein
GGAAGACGGUGAUUAUUAUAGGAAA 1 times at 23059 S protein
CGGUGAUUAUUAUAGGAAACAACUA 1 times at 23065 S protein
GGUGAUUAUUAUAGGAAACAACUAU 1 times at 23066 S protein
GGCUGGCUUGUUGCUAGUGGCUCAA 1 times at 23108 S protein
GCUUGUUGCUAGUGGCUCAACUGUU 1 times at 23113 S protein
GCAAUUACAGAUGGGCUUUGGUAUU 1 times at 23149 S protein
GGGCUUUGGUAUUACAGUUCAAUAU 1 times at 23161 S protein
GCUUGAAUUUGCUAAUGACACAAAA 1 times at 23215 S protein
GCAAUUGCGUGGAAUAUUCCCUCUA 1 times at 23256 S protein
CGUGGAAUAUUCCCUCUAUGGUGUU 1 times at 23263 S protein
GGUGUUCGACAGCAGCGCUUUGUUU 1 times at 23324 S protein
GCUAUUAUUCUGAUGAUGGCAACUA 1 times at 23373 S protein
CCCGUUCUACGCGAUCAAUGCUUAA 1 times at 23523 S protein
GGUUGUGUCCUAGGACUUGUUAAUU 1 times at 23588 S protein
CCUCUUUGUUCGUAGAGGACUGCAA 1 times at 23613 S protein
GCGCUUGGCAUCCAUUGCUUUUAAU 1 times at 23725 S protein
GGUUGAUCAACUUAAUAGUAGUUAU 1 times at 23761 S protein UUGAUCAACUUAAUAGUAGUUAU CCUUUGGUGUGACUCAGGAGUACAU 1 times at 23814 S protein
CCAUGGUGCCAAUUUACGCCAGGAU 1 times at 23959 S protein
GGUGCCAAUUUACGCCAGGAUGAUU 1 times at 23963 S protein
CGCCAGGAUGAUUCUGUACGUAAUU 1 times at 23975 S protein
GCCAGGAUGAUUCUGUACGUAAUUU 1 times at 23976 S protein CAGGAUGAUUCUGUACGUAAUUU
GGAUGAUUCUGUACGUAAUUUGUUU 1 times at 23980 S protein AUGAUUCUGUACGUAAUUUGUUU
CGUAAUUUGUUUGCGAGCGUGAAAA 1 times at 23993 S protein
GCGAGCGUGAAAAGCUCUCAAUCAU 1 times at 24005 S protein
CCAGGUUUUGGAGGUGACUUUAAUU 1 times at 24041 S protein CAGGUUUUGGAGGUGACUUUAAU
GGCAGUCGUAGUGCACGUAGUGCUA 1 times at 24098 S protein
GCAGUCGUAGUGCACGUAGUGCUAU 1 times at 24099 S protein
CGUAGUGCUAUUGAGGAUUUGCUAU 1 times at 24113 S protein
GCUGAUCCUGGUUAUAUGCAAGGUU 1 times at 24155 S protein
GGUUAUAUGCAAGGUUACGAUGAUU 1 times at 24164 S protein
GGUCCAGCAUCAGCUCGUGAUCUUA 1 times at 24200 S protein
CCAGCAUCAGCUCGUGAUCUUAUUU 1 times at 24203 S protein
GCUCGUGAUCUUAUUUGUGCUCAAU 1 times at 24212 S protein
GGAUGUUAAUAUGGAAGCCGCGUAU 1 times at 24271 S protein
GGUGUUGGCUGGACUGCUGGCUUAU 1 times at 24323 S protein
GCUGGACUGCUGGCUUAUCCUCCUU 1 times at 24330 S protein
GCUGGCUUAUCCUCCUUUGCUGCUA 1 times at 24338 S protein
GCUGCUAUUCCAUUUGCACAGAGUA 1 times at 24356 S protein
CGGUGUUGGCAUUACUCAACAGGUU 1 times at 24397 S protein
GGUUCUUUCAGAGAACCAAAAGCUU 1 times at 24418 S protein
CCAAAAGCU U AU U G CCAAUAAG U U U 1 times at 24433 S protein
GGAGCUAUGCAAACAGGCUUCACUA 1 times at 24470 S protein
GCUAUGCAAACAGGCUUCACUACAA 1 times at 24473 S protein
GCAAACAGGCUUCACUACAACUAAU 1 times at 24478 S protein
GGCUUCACUACAACUAAUGAAGCUU 1 times at 24485 S protein GGCUUCACUACAACUAAUGAAGC
GCUUCACUACAACUAAUGAAGCUUU 1 times at 24486 S protein
GCUAUCUAAUACUUUUGGUGCUAUU 1 times at 24571 S protein
GGCACAAUCCAAGCGUUCUGGAUUU 1 times at 24778 S protein
GCACAAUCCAAGCGUUCUGGAUUUU 1 times at 24779 S protein
CCCUAGCAACCACAUUGAGGUUGUU 1 times at 24880 S protein
CCUAGCAACCACAUUGAGGUUGUUU 1 times at 24881 S protein
CCACAUUGAGGUUGUUUCUGCUUAU 1 times at 24889 S protein
CCCUACUAAUUGUAUAGCCCCUGUU 1 times at 24934 S protein
CCUACUAAUUGUAUAGCCCCUGUUA 1 times at 24935 S protein
GCCCCUGUUAAUGGCUACUUUAUUA 1 times at 24950 S protein
CCCCUGUUAAUGGCUACUUUAUUAA 1 times at 24951 S protein CCCCUGUUAAUGGCUACUUUAUU
CCCUGUUAAUGGCUACUUUAUUAAA 1 times at 24952 S protein CCCUGUUAAUGGCUACUUUAUUA
CCUGUUAAUGGCUACUUUAUUAAAA 1 times at 24953 S protein
GGUCAUAUACUGGCUCGUCCUUCUA 1 times at 25005 S protein
CCUUAAUGAGUCUUACAUAGACCUU 1 times at 25279 S protein
GGCAAUUAUACUUAUUACAACAAAU 1 times at 25313 S protein GGCCGUGGUACAUUUGGCUUGGUUU 1 times at 25338 S protein
GCUGGGCUUGUUGCCUUAGCUCUAU 1 times at 25367 S protein
GCACUGGUUGUGGCACAAACUGUAU 1 times at 25413 S protein
GGUUGUGGCACAAACUGUAUGGGAA 1 times at 25418 S protein
GGCACAAACUGUAUGGGAAAACUUA 1 times at 25424 S protein
G C AC AAAC UGUAUGGG AAAAC U U AA 1 times at 25425 S protein CACAAACUGUAUGGGAAAACUUA
GGAAAACUUAAGUGUAAUCGUUGUU 1 times at 25439 S protein
CGUUGUUGUGAUAGAUACGAGGAAU 1 times at 25457 S protein
GCCGCAUAAGGUUCAUGUUCACUAA 1 times at 25492 S protein GCCGCAUAAGGUUCAUGUUCACU
CCGCAUAAGGUUCAUGUUCACUAAU 1 times at 25493 S protein
CGCAUAAGGUUCAUGUUCACUAAUU 1 times at 25494 S protein
GCAUAAGGUUCAUGUUCACUAAUUA 1 times at 25495 S protein
GGUUGCAUGCUUAGGGCUUGUAUUA 1 times at 25639 orf 3
CCAAGCUGAUACAGCUGGUCUUUAU 1 times at 25671 orf 3
GCUGAUACAGCUGGUCUUUAUACAA 1 times at 25675 orf 3
CGAAUUGACGUCCCAUCUGCAGAAU 1 times at 25705 orf 3
CCCUGUGCUGUGGAACUGUCAGCUA 1 times at 25973 orf 4a
CCUGUGCUGUGGAACUGUCAGCUAU 1 times at 25974 orf 4a
GCUGUGGAACUGUCAGCUAUCCUUU 1 times at 25979 orf 4a
GCUAUCCUUUGCUGGUUAUACUGAA 1 times at 25994 orf 4a
GCUGGUUAUACUGAAUCUGCUGUUA 1 times at 26004 orf 4a
GGUUAUACUGAAUCUGCUGUUAAUU 1 times at 26007 orf 4a
G CC AAACAG G ACG C AG C U CAG CG AA 1 times at 26046 orf 4a
CCAAACAG G ACG CAG CU CAG CG AAU 1 times at 26047 orf 4a
GGUUGCUACAUAAGGAUGGAGGAAU 1 times at 26077 orf 4a
CGGCACUCAAGUUUAUUCGCGCAAA 1 times at 26127 orf 4a
CCAACACACUAUGUCAGGGUUACAU 1 times at 26248 orf4b
GGGUUACAUUUUCAGACCCCAACAU 1 times at 26264 orf4b
GGUAUCUACGUUCGGGUCAUCAUUU 1 times at 26291 orf4b
GCCAACCUGUUUCUGAGUACCAUAU 1 times at 26351 orf4b
CCAACCU G U U U CU G AG U ACCAU AU U 1 times at 26352 orf4b
CCAUAUUACUCUAGCUUUGCUAAAU 1 times at 26370 orf4b
GCUAAAUCUCACUGAUGAAGAUUUA 1 times at 26388 orf4b
CGCCUUGCUGCGCAAAACUCUUGUU 1 times at 26475 orf4b
GCUGCGCAAAACUCUUGUUCUUAAU 1 times at 26481 orf4b CUGCGCAAAACUCUUGUUCUUAA
CGCAAAACUCUUGUUCUUAAUGCAU 1 times at 26485 orf4b CGCAAAACUCUUGUUCUUAAUGC
GGAUUGGCUUCUCGUUCAGGGAUUU 1 times at 26583 orf4b
GCUUCUCGUUCAGGGAUUUUCCCUU 1 times at 26589 orf4b
CG U U CAG GG AU U U U CCCU U U ACCAU 1 times at 26595 orf4b
CCCUUUACCAUAGUGGCCUCCCUUU 1 times at 26609 orf4b
CCUUUACCAUAGUGGCCUCCCUUUA 1 times at 26610 orf4b
CGCAAU UACAUCAU UACAAUGCCAU 1 times at 26677 orf4b
CCUCAACAAAUGUUUGUUACUCCUU 1 times at 26716 orf4b
CCAUACGGUCUUCCAAUCAGGGUAA 1 times at 26759 orf4b
GGUAAUAAACAAAUUGUUCAUUCUU 1 times at 26779 orf4b GGCUUUCUCGGCGUCUUUAUUUAAA 1 times at 26841 orf5 GGCUUUCUCGGCGUCUUUAUUUA
CCUAUUAUUACUGCUACGUCAAGAU 1 times at 26991 orf5
CCUUGUUCUGUAUAACUUUUUAUUA 1 times at 27057 orf5 UUGUUCUGUAUAACUUUUUAUUA
GGUGUACAUUAUCCAACUGGAAGUU 1 times at 27100 orf5
CCUCAUAAUACUUUGGUUUGUAGAU 1 times at 27147 orf5
CCAAACCAU U AU U U AU U AG AAACU U 1 times at 27284 orf5
GCGUUGCAGCUGUUCUCGUUGUUUU 1 times at 27315 orf5
CGUUGCAGCUGUUCUCGUUGUUUUU 1 times at 27316 orf5
GCAGCUGUUCUCGUUGUUUUUAUUU 1 times at 27320 orf5
CCACUUAUAUAGAGUGCACUUAUAU 1 times at 27353 orf5
GCACUUAUAUUAGCCGUUUUAGUAA 1 times at 27368 orf5
CCG UU U UAGUAAGAU U AGCCU AG U U 1 times at 27381 orf5
CG U U U U AG U AAG AU U AGCCU AG U U U 1 times at 27382 orf5
CGCGCGAUUCAGUUCCUCUUCACAU 1 times at 27461 orf5
GCGCGAUUCAGUUCCUCUUCACAUA 1 times at 27462 orf5
CGCG AU U CAG U U CCU CU U CACAU AA 1 times at 27463 orf5
GCGAUUCAGUUCCUCUUCACAUAAU 1 times at 27464 orf5
CGCCCCGAGCUCGCUUAUCGUUUAA 1 times at 27489 orf5
CGUUUAAGCAGCUCUGCGCUACUAU 1 times at 27507 orf5
GGGUCCCGUGUAGAGGCUAAUCCAU 1 times at 27532
GGUCCCGUGUAGAGGCUAAUCCAUU 1 times at 27533
GGACAUAUGGAAAACGAACUAUGUU 1 times at 27569 GACAUAUGGAAAACGAACUAUGU
CCGUAGUAUGUGCUAUAACACUCUU 1 times at 27647 E
GGCUUUCCUUACGGCUACUAGAUUA 1 times at 27681 E
GCUUUCCUUACGGCUACUAGAUUAU 1 times at 27682 E
GCUACUAGAUUAUGUGUGCAAUGUA 1 times at 27694 E
CCCUGUUAGUUCAGCCCGCAUUAUA 1 times at 27734 E
CCCAUCCCGUAGUAUGACUGUCUAU 1 times at 27965 M
GGCCAUCUUCCAUGGCGCUAUCAAU 1 times at 28021 M
GCCAUCUUCCAUGGCGCUAUCAAUA 1 times at 28022 M
CCAUCUUCCAUGGCGCUAUCAAUAU 1 times at 28023 M
CCAAUUGAUCUAGCUUCCCAGAUAA 1 times at 28062 M
GGCAUUGUAGCAGCUGUUUCAGCUA 1 times at 28092 M GGCAUUGUAGCAGCUGUUUCAGC
GCAUUGUAGCAGCUGUUUCAGCUAU 1 times at 28093 M
GCUGUUUCAGCUAUGAUGUGGAUUU 1 times at 28104 M
GGAUUUCCUACUUUGUGCAGAGUAU 1 times at 28123 M
CGGCUGUUUAUGAGAACUGGAUCAU 1 times at 28149 M
CCAGUGUAACUGCUGUUGUAACCAA 1 times at 28261 M
CCACCUCAAAAUGGCUGGCAUGCAU 1 times at 28289 M
GCAUGCAUUUCGGUGCUUGUGACUA 1 times at 28306 M
CGGUGCUUGUGACUACGACAGACUU 1 times at 28316 M
GCUUGUGACUACGACAGACUUCCUA 1 times at 28320 M
G CU U U AAAAAU GGUGAAGCGG CAAA 1 times at 28380 M
GGAACUAAUUCCGGCGUUGCCAUUU 1 times at 28410 M
CCGGCGUUGCCAUUUACCAUAGAUA 1 times at 28420 M CGGCGUUGCCAUUUACCAUAGAUAU 1 times at 28421 M
GGCGUUGCCAUUUACCAUAGAUAUA 1 times at 28422 M
GCGUUGCCAUUUACCAUAGAUAUAA 1 times at 28423 M
GCAGGUAAUUACAGGAGUCCGCCUA 1 times at 28449 M
GGUAAUUACAGGAGUCCGCCUAUUA 1 times at 28452 M
GGAGUCCGCCUAUUACGGCGGAUAU 1 times at 28462 M
GCCUAUUACGGCGGAUAUUGAACUU 1 times at 28469 M GCCUAUUACGGCGGAUAUUGAAC
GGCGGAUAUUGAACUUGCAUUGCUU 1 times at 28478 M
GCAUUGCUUCGAGCUUAGGCUCUUU 1 times at 28494 M
GCUUCGAGCUUAGGCUCUUUAGUAA 1 times at 28499 M
GGCAGGGUGUACCUCUUAAUGCCAA 1 times at 28743 N
GCAGGGUGUACCUCUUAAUGCCAAU 1 times at 28744 N
GGGUAUUGGCGGAGACAGGACAGAA 1 times at 28790 N
GGUAUUGGCGGAGACAGGACAGAAA 1 times at 28791 N
GGCGGAGACAGGACAGAAAAAUUAA 1 times at 28797 N
GCGGAGACAGGACAGAAAAAUUAAU 1 times at 28798 N
CGGAGACAGGACAGAAAAAUUAAUA 1 times at 28799 N
GGACAGAAAAAUUAAUACCGGGAAU 1 times at 28807 N
GCAGCACUCCCAUUCCGGGCUGUUA 1 times at 28889 N
CCGGGCUGUUAAGGAUGGCAUCGUU 1 times at 28903 N
CGGGCUGUUAAGGAUGGCAUCGUUU 1 times at 28904 N
GGAUGGCAUCGUUUGGGUCCAUGAA 1 times at 28915 N
GGCGCCACUGAUGCUCCUUCAACUU 1 times at 28943 N
GCGCCACUGAUGCUCCUUCAACUUU 1 times at 28944 N
CGCCACUGAUGCUCCUUCAACUUUU 1 times at 28945 N
GGGACGCGGAACCCUAACAAUGAUU 1 times at 28970 N
CCGGUACUAAGCUUCCUAAAAACUU 1 times at 29019 N CCGGUACUAAGCUUCCUAAAAAC
CCACAUUGAGGGGACUGGAGGCAAU 1 times at 29044 N
GGGACUGGAGGCAAUAGUCAAUCAU 1 times at 29054 N
GGAGGCAAUAGUCAAUCAUCUUCAA 1 times at 29060 N GAGGCAAUAGUCAAUCAUCUUCA
CGGAGCAGUAGGAGGUGAUCUACUU 1 times at 29182 N
GGAGCAGUAGGAGGUGAUCUACUUU 1 times at 29183 N
CCUUGAUCUUCUGAACAGACUACAA 1 times at 29209 N
G G CAAAG U AAAG C AAU CG C AG CCAA 1 times at 29246 N
G CAAAG U AAAG CAAU CG CAG CCAAA 1 times at 29247 N
CG C AG CC AAAAG U AAU CACU AAG AA 1 times at 29262 N
GCGCCACAAGCGCACUUCCACCAAA 1 times at 29314 N
CGCCACAAGCGCACUUCCACCAAAA 1 times at 29315 N
G CACU U CCACCAAAAG U U U CAACAU 1 times at 29325 N
CGCGGACCAGGAGACCUCCAGGGAA 1 times at 29369 N
GCGGACCAGGAGACCUCCAGGGAAA 1 times at 29370 N
CCUCCAGGGAAACUUUGGUGAUCUU 1 times at 29383 N
CCAGGGAAACUUUGGUGAUCUUCAA 1 times at 29386 N
CCCCAAAUUGCUGAGCUUGCUCCUA 1 times at 29444 N
GCUUGCUCCUACAGCCAGUGCUUUU 1 times at 29458 N CCUACAGCCAGUGCUUUUAUGGGUA 1 times at 29465 N
GCUUUUAUGGGUAUGUCGCAAUUUA 1 times at 29477 N
CGCAAUUUAAACUUACCCAUCAGAA 1 times at 29493 N
GCAACCCUGUGUACUUCCUUCGGUA 1 times at 29532 N
CCUUCGGUACAGUGGAGCCAUUAAA 1 times at 29548 N
GGUUGGAGCUUCUUGAGCAAAAUAU 1 times at 29604 N
GGAGCUUCUUGAGCAAAAUAUUGAU 1 times at 29608 N GAGCUUCUUGAGCAAAAUAUUGA
G G AA AAG AAAC A AAAG G C ACC AA AA 1 times at 29656 N
CGUCCAAGUGUUCAGCCUGGUCCAA 1 times at 29759 N
CCAAU GAU U G AU G U U AACACU G AU U 1 times at 29780 N
Table 2
Figure imgf000055_0001
CGGCUUCAGUUAACCAAAUUGUCUU 1 times at 8286 NSP3 GGCUUCAGUUAACCAAAUUGUCU
CGCAUUGCAUGCCGUAAGUGUAAUU 1 times at 8387 NSP3 CGCAUUGCAUGCCGUAAGUGUAA
CCUCAAAGCUACGCGCUAAUGAUAA 1 times at 8430 NSP3 CUCAAAGCUACGCGCUAAUGAUA
CCGCAUCUUGGACUUUAAAGUUCUU 1 times at 8638 NSP4 CCGCAUCUUGGACUUUAAAGUUC
GCUCUUCUAUUAUAUUAAUAAAGUA 1 times at 9406 NSP4 CUCUUCUAUUAUAUUAAUAAAGU
GCUGCCUCUAAUAUCUUUGUUAUUA 1 times at 9767 NSP4 UGCCUCUAAUAUCUUUGUUAUUA
CCUCUAAUAUCUUUGUUAUUAACAA 1 times at 9771 NSP4 CUCUAAUAUCUUUGUUAUUAACA
GCAGCUCUUAGAAACUCUUUAACUA 1 times at 9806 NSP4 CAGCUCUUAGAAACUCUUUAACU
CGGAAGUGAAGAUGAUACUUUUAUU 1 times at 11556 NSP6 CGGAAGUGAAGAUGAUACUUUUA
GGAAGUGAAGAUGAUACUUUUAUUA 1 times at 11557 NSP6 AAGUGAAGAUGAUACUUUUAUUA
GGCUAUGACUUCUAUGUAUAAGCAA 1 times at 12259 NSP8 GGCUAUGACUUCUAUGUAUAAGC
CCCCAAU CU AAAG AU U CCAAU U U U U 1 times at 13403 NSP10 CCCCAAU CU AAAG AU U CCAAU U U
CCCAAUCUAAAGAUUCCAAUUUUUU 1 times at 13404 NSP10 CCCAAU CU AAAG AU U CCAAU U U U
GCUGUGAUGUUACCUACUUUGAAAA 1 times at 13862 NSP12 CUGUGAUGUUACCUACUUUGAAA
CCCAGUGUUAUUGGUGUUUAUCAUA 1 times at 13915 NSP12 CCCAGUGUUAUUGGUGUUUAUCA
CCAGUGUUAUUGGUGUUUAUCAUAA 1 times at 13916 NSP12 CAGUGUUAUUGGUGUUUAUCAUA
GGUACAACUCUUUGAGAAGUACUUU 1 times at 14247 NSP12 UACAACUCUUUGAGAAGUACUUU
CCUCCUCUAACGCUUUUCUUGAUUU 1 times at 14558 NSP12 CUCCUCUAACGCUUUUCUUGAUU
CCUACUAUGUGUGACAUCAAACAAA 1 times at 14791 NSP12 UACUAUGUGUGACAU C AAAC AAA
GCUGGGAUUUCAUGCUUAAAACAUU 1 times at 15200 NSP12 UGGGAUUUCAUGCUUAAAACAUU
GGGAUUUCAUGCUUAAAACAUUGUA 1 times at 15203 NSP12 GGGAUUUCAUGCUUAAAACAUUG
CCACUGCAUAUGCCAAUAGUGUCUU 1 times at 15467 NSP12 CACUGCAUAUGCCAAUAGUGUCU
GGGUGCUAAUGGCAACAAGAUUGUU 1 times at 15534 NSP12 GGGUGCUAAUGGCAACAAGAUUG
CCCCAAAUUUGUUGAUAAAUACUAU 1 times at 15624 NSP12 CCCCAAAUUUGUUGAUAAAUACU
CGGUUGCUUUGUAGAUGAUAUCGUU 1 times at 15930 NSP12 CGGUUGCUUUGUAGAUGAUAUCG
GGUUGCUUUGUAGAUGAUAUCGUUA 1 times at 15931 NSP12 UUGCUUUGUAGAUGAUAUCGUUA
CCCUCUCACAAAGCAUGAAGAUAUA 1 times at 16011 NSP12 CUCUCACAAAGCAUGAAGAUAUA
GGUCUACUUACAGUAUAUAGAAAAA 1 times at 16056 NSP12 GUCUACUUACAGUAUAUAGAAAA
CCACCACUCAAUCGUAAUUAUGUUU 1 times at 16726 NSP13 ACCACUCAAUCGUAAUUAUGUUU
CCUACAAGUCUAGUACAACGUAUAA 1 times at 16835 NSP13 U ACAAG U C U AG U ACAACG U AU AA
GCACUAAUUAUGAUCUUUCAAUUAU 1 times at 17342 NSP13 CACUAAUUAUGAUCUUUCAAUUA
GCAUGGAGUAAGGCAGUCUUUAUUU 1 times at 17719 NSP13 AUGGAGUAAGGCAGUCUUUAUUU
G CACAU G CU AACAACAU U AACAG AU 1 times at 17863 NSP13 CACAU G CU AACAACAU U AACAG A
GCCCAAAAAGGUAUUCUUUGUGUUA 1 times at 17908 NSP13 GCCCAAAAAGGUAUUCUUUGUGU
GCACUCUUUGAGUCCUUAGAGUUUA 1 times at 17944 NSP13 CACUCUUUGAGUCCUUAGAGUUU
CCUGCGGUUAUGAUUAUGUCUACAA 1 times at 18689 NSP14 CUGCGGUUAUGAUUAUGUCUACA
CGGUUCAUUUGACAAAGUCUAUGAU 1 times at 18969 NSP14 CGGUUCAUUUGACAAAGUCUAUG
GGUUCAUUUGACAAAGUCUAUGAUA 1 times at 18970 NSP14 UUCAUUUGACAAAGUCUAUGAUA
GGUAGUAUGAUAGAGGAUAUUGAUU 1 times at 19360 NSP14 UAGUAUGAUAGAGGAUAUUGAUU
GGUGUUAUAAGACCUUUGAUAUUUA 1 times at 19517 NSP14 GUGUUAUAAGACCUUUGAUAUUU
GGGAUUAUGAACGUAGCAAUAUUUA 1 times at 19829 NSP15 GGGAUUAUGAACGUAGCAAUAUU
GCCAUCUUUAUUUCUGAUAGAAAAA 1 times at 19972 NSP15 GCCAUCUUUAUUUCUGAUAGAAA
CCAUCUUUAUUUCUGAUAGAAAAAU 1 times at 19973 NSP15 AUCUUUAUUUCUGAUAGAAAAAU
CCGUGAUAGUGAUGUUGUUAAACAA 1 times at 20055 NSP15 CCGUGAUAGUGAUGUUGUUAAAC
GGUCUUCACUUGCUUAUUGGUUUAU 1 times at 20302 NSP15 GUCUUCACUUGCUUAUUGGUUUA GCUCAACUAUUCAUAACUAUUUUAU 1 times at 20378 NSP15 CUCAACUAUUCAUAACUAUUUUA
GGUUCCUAUUGACUUAACAAUGAUU 1 times at 20520 NSP15 UUCCUAUUGACUUAACAAUGAUU
CCCUCUUUAAAGUUCAAAAUGUAAA 1 times at 20639 NSP16 CU CU U UAAAG U UCAAAAU G U AAA
CCUGCCAAUAUGCGUGUUAUACAUU 1 times at 20785 NSP16 UGCCAAUAUGCGUGUUAUACAUU
CCGACAUGUAUGAUCCUACUACUAA 1 times at 20987 NSP16 GACAUGUAUGAUCCUACUACUAA
GGAGCGUUGAACUUUAUGAACUUAU 1 times at 21128 NSP16 GAGCGUUGAACUUUAUGAACUUA
GGGUACUAUUAAAGAAAAUAUAGAU 1 times at 21237 NSP16 GGGUACUAUU AAAG AAAAU AU AG
GGCCGUACAUAUUCUAACAUAACUA 1 times at 21635 S protein GGCCGUACAUAUUCUAACAUAAC
GCCGUACAUAUUCUAACAUAACUAU 1 times at 21636 S protein GCCGUACAUAUUCUAACAUAACU
GGGAGACCAUGGUGAUAUGUAUGUU 1 times at 21688 S protein CACUUUACUUAGAGCUUUUUAUU
GCACCUU U AUG UACACU UAUAACAU 1 times at 22164 S protein CACCUUUAUGUACACUUAUAACA
CCGAAGAUGAGAUUUUAGAGUGGUU 1 times at 22191 S protein CCGAAGAUGAGAUUUUAGAGUGG
GGUCCAAUAUCCCAGUUUAAUUAUA 1 times at 22838 S protein U GG U CCAAU AU CCCAG U U UAAU U
CCCAGUUUAAUUAUAAACAGUCCUU 1 times at 22848 S protein CCCAGUUUAAUUAUAAACAGUCC
GGUUGAUCAACUUAAUAGUAGUUAU 1 times at 23761 S protein UUGAUCAACUUAAUAGUAGUUAU
GCCAGGAUGAUUCUGUACGUAAUUU 1 times at 23976 S protein CAGGAUGAUUCUGUACGUAAUUU
GGAUGAUUCUGUACGUAAUUUGUUU 1 times at 23980 S protein AUGAUUCUGUACGUAAUUUGUUU
CCAGGUUUUGGAGGUGACUUUAAUU 1 times at 24041 S protein CAGGUUUUGGAGGUGACUUUAAU
GGCUUCACUACAACUAAUGAAGCUU 1 times at 24485 S protein GGCUUCACUACAACUAAUGAAGC
CCCCUGUUAAUGGCUACUUUAUUAA 1 times at 24951 S protein CCCCUGUUAAUGGCUACUUUAUU
CCCUGUUAAUGGCUACUUUAUUAAA 1 times at 24952 S protein CCCUGUUAAUGGCUACUUUAUUA
G C AC AAAC U G U A U G G G AAAAC U U AA 1 times at 25425 S protein C AC AAAC UGUAUGGG AAAAC U U A
GCCGCAUAAGGUUCAUGUUCACUAA 1 times at 25492 S protein GCCGCAUAAGGUUCAUGUUCACU
GCUGCGCAAAACUCUUGUUCUUAAU 1 times at 26481 orf4b CUGCGCAAAACUCUUGUUCUUAA
CGCAAAACUCUUGUUCUUAAUGCAU 1 times at 26485 orf4b CGCAAAACUCUUGUUCUUAAUGC
GGCUUUCUCGGCGUCUUUAUUUAAA 1 times at 26841 orf5 GGCUUUCUCGGCGUCUUUAUUUA
CCUUGUUCUGUAUAACUUUUUAUUA 1 times at 27057 orf5 UUGUUCUGUAUAACUUUUUAUUA
GGACAUAUGGAAAACGAACUAUGUU 1 times at 27569 GACAUAUGGAAAACGAACUAUGU
GGCAUUGUAGCAGCUGUUUCAGCUA 1 times at 28092 M GGCAUUGUAGCAGCUGUUUCAGC
GCCUAUUACGGCGGAUAUUGAACUU 1 times at 28469 M GCCUAUUACGGCGGAUAUUGAAC
CCGGUACUAAGCUUCCUAAAAACUU 1 times at 29019 N CCGGUACUAAGCUUCCUAAAAAC
Table 3
Predicted 25 mer siRNA targeting
25mer blunt ended sequences
SiRNA sequence Start Protein 23 mer Sequences passing all
Base Name metrics and BLAST search
CCCAGAAUCUGCUUAAGAAGUUGAU 1 times at 825 NSP1 CCCAGAAUCUGCUUAAGAAGUUG
GCCCAUUCAUGGAUAAUGCUAUUAA 1 times at 1884 NSP2 GCCCAUUCAUGGAUAAUGCUAUU
CCCAUUCAUGGAUAAUGCUAUUAAU 1 times at 1885 NSP2 CCCAUUCAUGGAUAAUGCUAUUA
CGCCAUUACUGCACCUUAUGUAGUU 1 times at 1936 NSP2 CGCCAUUACUGCACCUUAUGUAG
GGCGACUUUAUGUCUACAAUUAUUA 1 times at 2186 NSP2 GGCGACUUUAUGUCUACAAUUAU
CGCAAUACGUAAAGCUAAAGAUUAU 1 times at 4144 NSP3 CGCAAUACGUAAAGCUAAAGAUU
GGGUGUUGAUUAUACUAAGAAGUUU 1 times at 4228 NSP3 GGGUGUUGAUUAUACUAAGAAGU
CGCACUAAUGGUGGUUACAAUUCUU 1 times at 4517 NSP3 CGCACUAAUGGUGGUUACAAUUC
GGCUUCAUUUUAUUUCAAAGAAUUU 1 times at 6487 NSP3 GGCUUCAUUUUAUUUCAAAGAAU
GCGCUUUUACAAAUCUAGAUAAGUU 1 times at 7740 NSP3 GCGCUUUUACAAAUCUAGAUAAG
CGCAUUGCAUGCCGUAAGUGUAAUU 1 times at 8387 NSP3 CGCAUUGCAUGCCGUAAGUGUAA
CCGCAUCUUGGACUUUAAAGUUCUU 1 times at 8638 NSP4 CCGCAUCUUGGACUUUAAAGUUC
CGGAAGUGAAGAUGAUACUUUUAUU 1 times at 11556 NSP6 CGGAAGUGAAGAUGAUACUUUUA
GGCUAUGACUUCUAUGUAUAAGCAA 1 times at 12259 NSP8 GGCUAUGACUUCUAUGUAUAAGC
CCCCAAUCUAAAGAUUCCAAUUUUU 1 times at 13403 NSP10 CCCCAAUCUAAAGAUUCCAAUUU
CCCAAUCUAAAGAUUCCAAUUUUUU 1 times at 13404 NSP10 CCCAAUCUAAAGAUUCCAAUUUU
CCCAGUGUUAUUGGUGUUUAUCAUA 1 times at 13915 NSP12 CCCAGUGUUAUUGGUGUUUAUCA
GGGAUUUCAUGCUUAAAACAUUGUA 1 times at 15203 NSP12 GGGAUUUCAUGCUUAAAACAUUG
GGGUGCUAAUGGCAACAAGAUUGUU 1 times at 15534 NSP12 GGGUGCUAAUGGCAACAAGAUUG
CCCCAAAU U UG U U G AU AAAU ACU AU 1 times at 15624 NSP12 CCCCAAAU U U G U U GAU AAAU ACU
CGGUUGCUUUGUAGAUGAUAUCGUU 1 times at 15930 NSP12 CGGUUGCUUUGUAGAUGAUAUCG
GCCCAAAAAGGUAUUCUUUGUGUUA 1 times at 17908 NSP13 GCCCAAAAAGGUAUUCUUUGUGU
CG G U UCAU U UGACAAAG U CU AU G AU 1 times at 18969 NSP14 CGGUUCAUUUGACAAAGUCUAUG
GGGAUUAUGAACGUAGCAAUAUUUA 1 times at 19829 NSP15 GGGAUUAUGAACGUAGCAAUAUU
GCCAUCUUUAUUUCUGAUAGAAAAA 1 times at 19972 NSP15 GCCAUCUUUAUUUCUGAUAGAAA
CCGUGAUAGUGAUGUUGUUAAACAA 1 times at 20055 NSP15 CCGUGAUAGUGAUGUUGUUAAAC
GGGUACUAUUAAAGAAAAUAUAGAU 1 times at 21237 NSP16 GGGUACUAUUAAAGAAAAUAUAG
GGCCGUACAUAUUCUAACAUAACUA 1 times at 21635 S protein GGCCGUACAUAUUCUAACAUAAC
GCCGUACAUAUUCUAACAUAACUAU 1 times at 21636 S protein GCCGUACAUAUUCUAACAUAACU
CCGAAGAUGAGAUUUUAGAGUGGUU 1 times at 22191 S protein CCGAAGAUGAGAUUUUAGAGUGG
CCCAGUUUAAUUAUAAACAGUCCUU 1 times at 22848 S protein CCCAG U UUAAU U AU AAACAG U CC
GGCUUCACUACAACUAAUGAAGCUU 1 times at 24485 S protein GGCUUCACUACAACUAAUGAAGC
CCCCUGUUAAUGGCUACUUUAUUAA 1 times at 24951 S protein CCCCUGUUAAUGGCUACUUUAUU
CCCUGUUAAUGGCUACUUUAUUAAA 1 times at 24952 S protein CCCUGUUAAUGGCUACUUUAUUA
GCCGCAUAAGGUUCAUGUUCACUAA 1 times at 25492 S protein GCCGCAUAAGGUUCAUGUUCACU
CGCAAAACUCUUGUUCUUAAUGCAU 1 times at 26485 orf4b CGCAAAACUCUUGUUCUUAAUGC
GGCUUUCUCGGCGUCUUUAUUUAAA 1 times at 26841 orf5 GGCUUUCUCGGCGUCUUUAUUUA
GGCAUUGUAGCAGCUGUUUCAGCUA 1 times at 28092 M GGCAUUGUAGCAGCUGUUUCAGC
GCCUAUUACGGCGGAUAUUGAACUU 1 times at 28469 M GCCUAUUACGGCGGAUAUUGAAC
CCGGUACUAAGCUUCCUAAAAACUU 1 times at 29019 N CCGGUACUAAGCUUCCUAAAAAC Table 4 Characterization indexes of five SLiC species and five SLiC-siRNA nanoparticles, including particle sizes, poly-dispersity index (PDI) and Zeta-potential.
Figure imgf000059_0001

Claims

WHAT IS CLAIMED IS:
1. A pharmaceutical composition comprising at least two different siRNA molecules that target one or more conserved regions of the genome of a Middle-East Respiratory Syndrome Corona Virus (MERS-CoV) and a pharmaceutically acceptable carrier comprising a polymeric nanoparticle or a liposomal nanoparticle.
2. The composition of claim 1, wherein the gene sequences in the conserved regions of the MERS-CoV are critical for the viral infection of a mammal.
3. The composition of claim 2, wherein the mammal is a human, mouse, ferret, or
monkey.
4. The composition of claim 1, wherein the targeted conserved regions of the genome comprise gene sequences coding for MERS-CoV proteins selected from the group consisting of Papain-like protease (PLpro), RNA-dependent RNA polymerase (RdRp), and Spike protein.
5. The composition of claim 4, wherein the siRNA molecules target PLpro viral gene
expression.
6. The composition of claim 4, wherein the siRNA molecules target RdRp viral gene expression.
7. The composition of claim 4, wherein the siRNA molecules target Spike viral gene expression.
8. The composition of claim 4, wherein the siRNA molecules are selected from the group consisting of:
MPL1 : CGCAAUACGUAAAGCUAAAGAUUAU,
MPL2: GGGUGUUGAUUAUACUAAGAAGUUU,
MPL3 : CGCAUAAUGGUGGUUACAAUUCUU,
MPL4: GGCUUCAUUUUAUUUCAAAGAAUUU,
MPL5: GCGCUUUUACAAAUCUAGAUAAGUU,
MPL6: CGCAUUGCAUGCCGUAAGUGUAAUU,
MRR1 : CCCAGUGUUAUUGGUGUUUAUCAUA,
MRR2: GGGAUUUCAUGCUUAAAACAUUGUA,
MRR3 : GGGUGCUAAUGGCAACAAGAUUGUU,
MRR4: CCCCAAAUUUGUUGAUAAAUACUAU, MRR5: CGGUUGCUUUGUAGAUGAUAUCGUU,
MSP1 : GGCCGUACAUAUUCUAACAUAACUA,
MSP2: GGCCGUACAUAUUCUAACAUAACUA,
MSP3 : CCGAAGAUGAGAUUUUAGAGUGGUU,
MSP4: CCCAGUUUAAUUAUAAACAGUCCUU,
MSP5: GGCUUCACUACAACUAAUGAAGCUU,
MSP6: CCCCUGUUAAUGGCUACUUUAUUAA,
MSP7: CCCUGUUAAUGGCUACUUUAUUAAA, and
MSP8: GCCGCAUAAGGUUCAUGUUCACUAA.
9. The composition of claim 5, wherein the siRNA molecules that target the PLpro gene are selected from the group consisting of:
MPL1 : CGCAAUACGUAAAGCUAAAGAUUAU,
MPL2: GGGUGUUGAUUAUACUAAGAAGUUU,
MPL3 : CGCAUAAUGGUGGUUACAAUUCUU,
MPL4: GGCUUCAUUUUAUUUCAAAGAAUUU,
MPL5: GCGCUUUUACAAAUCUAGAUAAGUU, and
MPL6: CGCAUUGCAUGCCGUAAGUGUAAUU.
10. The composition of claim 6, wherein the siRNA molecules that target the RdRp gene are selected from the group consisting of:
MRR1 : CCCAGUGUUAUUGGUGUUUAUCAUA,
MRR2: GGGAUUUCAUGCUUAAAACAUUGUA,
MRR3 : GGGUGCUAAUGGCAACAAGAUUGUU,
MRR4: CCCCAAAUUUGUUGAUAAAUACUAU, and
MRR5: CGGUUGCUUUGUAGAUGAUAUCGUU.
11. The composition of claim 7, wherein the siRNA molecules that target the Spike gene are selected from the group consisting of:
MSP1 : GGCCGUACAUAUUCUAACAUAACUA, MSP2: GGCCGUACAUAUUCUAACAUAACUA,
MSP3 : CCGAAGAUGAGAUUUUAGAGUGGUU,
MSP4: CCCAGUUUAAUUAUAAACAGUCCUU,
MSP5: GGCUUCACUACAACUAAUGAAGCUU,
MSP6: CCCCUGUUAAUGGCUACUUUAUUAA,
MSP7: CCCUGUUAAUGGCUACUUUAUUAAA, and
MSP8: GCCGCAUAAGGUUCAUGUUCACUAA.
12. The composition of claim 1, comprising a siRNA cocktail, MSTPR1, wherein a first siRNA molecule comprises MPL1 : C GC A AU AC GU A A AGCU A A AGAUU AU and a second siRNA molecule comprises MRRl :
CCCAGUGUUAUUGGUGUUUAUCAUA.
13. The composition of claim 1, comprising a siRNA cocktail, MSTPR2, wherein a first siRNA molecule comprises MPL2: GGGGUUGAUUAUACUAAGAAGUUU and a second siRNA molecule comprises MRR2:
GGGAUUUCAUGCUUAAAACAUUGUA
14. The composition of claim 1, comprising a siRNA cocktail, MSTRS2, wherein a first siRNA molecule comprises MRR2: GGGAUUUCAUGCUUAAAACAUUGUA and a second siRNA molecule comprises MSP2: GGCCGUACAUAUUCUAACAUAACUA.
15. The composition of claim 1, comprising a siRNA cocktail, MSTRS1, wherein a first siRNA molecule compri ses MRRl : CCCAGUGUUAUUGGUGUUUAUCAUA and a second siRNA molecule comprises MSPl : GGCCGUACAUAUUCUAACAUAACUA.
16. The composition of claim 1, comprising a siRNA cocktail, MSTPRS1, wherein a first siRNA molecule comprises MPL1 : C GC A AU AC GU A A AGCU A A AGAU AU, a second siRNA molecule comprises MRRl :
CCCAGUGUUAUUGGUGUUUAUCAUA, and a third siRNA molecule comprises
MSPl : GGCCGUACAUAUUCUAACAUAACUA.
17. The composition of claim 1, comprising a siRNA cocktail, MSTPRS2, wherein a first siRNA molecule comprises MPL2: GGGUGUUGAUUAUACUAAGAAGUUU a second siRNA molecule comprises MRR2:
GGGAUUUCAUGCUUAAAACAUUGUA, and a third siRNA molecule comprises
MSP2: GGCCGUACAUAUUCUAACAUAACUA.
18. The composition of any one of claims 1-17, wherein the polymeric nanoparticle carrier comprises a Histidine-Lysine co-polymer (HKP).
19. The composition of claim 18, wherein the HKP comprises the structure (R)K(R)-K(R)- (R)K(X), where R =KHHHKHHHKHHHKHHHK, K = lysine, and H = histidine.
20. The composition of any one of claims 1-17, wherein the liposomal nanoparticle carrier comprises a Spermine-Lipid Conjugate (SLiC) and cholesterol.
21. The composition of claim 20, wherein the SLiC comprises one of the structures shown in Figure 8.
22. The composition of any one of claims 1-17, wherein the HKP and siRNA molecules are formulated into nanoparticles.
23. The composition of any one of claims 1-17, wherein the SLiC and the siRNA molecules are formulated into nanoparticles.
24. The composition of claim 18, wherein the HKP and the siRNA molecules self-assemble into nanoparticles.
25. The composition of claim 20, wherein the SLiC and the siRNA self-assemble into
nanoparticles in formulation with cholesterol.
26. The composition of any one of claims 1-25, wherein the siRNA molecules comprise oligonucleotides with a length of 19-25 base pairs.
27. The composition of any one of claims 1-25, wherein the siRNA molecules comprise oligonucleotides with a length of 21-25 base pairs.
28. The composition of any one of claims 1-25, wherein the siRNA molecules comprise oligonucleotides with a length of 25 base pairs.
29. A method of treating a subject with a MERS infection comprising administering to said subject a pharmaceutically effective amount of the composition of claim 1.
30. A method of treating a subject with a MERS infection comprising administering to said subject a pharmaceutically effective amount of the composition of any one of claims 2- 28.
31. The method of claims 29 or 30, wherein the composition is administered to the subject through airway instillation.
32. The method of claims 29 or 30, wherein the composition is administered to the subject through intraperitoneal administration.
33. The method of claims 29 or 30, wherein the composition is administered to the subject through an airway nebulizer.
34. The method of claims 29 or 30, wherein the composition is administered to the subject through subcutaneous administration.
35. The method of any one of claims 26-34, wherein the subject is a mammal.
36. The method of claim 35, wherein the mammal is a human, mouse, ferret, or monkey.
37. The method of claim 35, wherein the mammal is a human.
38. An siRNA molecule that targets a conserved region of the genome of a MERS-CoV.
39. The siRNA molecule of claim 38, wherein the targeted conserved region of the genome comprises gene sequences coding for MERS-CoV proteins selected from the group consisting of Papain-like protease (PLpro), RNA-dependent RNA polymerase (RdRp), and Spike protein.
40. The siRNA molecule of claim 39, wherein the siRNA molecule targets PLpro virus gene expression.
41. The siRNA molecule of claim 39, wherein the siRNA molecule targets RdRp viral gene expression.
42. The siRNA molecule of claim 39, wherein the siRNA molecule targets Spike viral gene expression.
43. The siRNA molecule of claim 38, wherein the molecule is selected from the group consisting of the molecules identified in Table 3.
44. The siRNA molecule of claim 38, wherein the wherein the siRNA molecules are
selected from the group consisting of:
MPL1 : CGCAAUACGUAAAGCUAAAGAUUAU,
MPL2: GGGUGUUGAUUAUACUAAGAAGUUU,
MPL3 : CGCAUAAUGGUGGUUACAAUUCUU,
MPL4: GGCUUCAUUUUAUUUCAAAGAAUUU,
MPL5: GCGCUUUUACAAAUCUAGAUAAGUU,
MPL6: CGCAUUGCAUGCCGUAAGUGUAAUU,
MRR1 : CCCAGUGUUAUUGGUGUUUAUCAUA,
MRR2: GGGAUUUCAUGCUUAAAACAUUGUA,
MRR3 : GGGUGCUAAUGGCAACAAGAUUGUU,
MRR4: CCCCAAAUUUGUUGAUAAAUACUAU,
MRR5: CGGUUGCUUUGUAGAUGAUAUCGUU,
MSP1 : GGCCGUACAUAUUCUAACAUAACUA, MSP2 GGCCGUACAUAUUCUAACAUAACUA,
MSP3 CCGAAGAUGAGAUUUUAGAGUGGUU,
MSP4 CCCAGUUUAAUUAUAAACAGUCCUU,
MSP5 GGCUUCACUACAACUAAUGAAGCUU,
MSP6 CCCCUGUUAAUGGCUACUUUAUUAA,
MSP7: CCCUGUUAAUGGCUACUUUAUUAAA, and
MSP8: GCCGCAUAAGGUUCAUGUUCACUAA.
45. The siRNA molecule of any one of claims 38-44, wherein the siRNA molecule
comprises oligonucleotides with a length of 19-25 base pairs.
46. The siRNA molecule of any one of claims 38-44, wherein the siRNA molecule
comprises oligonucleotides with a length of 21-25 base pairs.
47. The siRNA molecule of any one of claims 38-44, wherein the siRNA molecule
comprises oligonucleotides with a length of 25 base pairs.
48. A composition comprising the siRNA molecule of any one of claims 38-47 and a
pharmaceutically acceptable carrier comprising a polymeric nanoparticle or a liposomal nanoparticle.
49. A method of treating a subject with a MERS infection comprising administering to said subject a pharmaceutically effective amount of the composition of claim 48.
50. The method of claim 49, wherein the subject is a human.
51. The composition of claim 44, wherein the siRNA molecules comprise derivatives of the identified siRNA molecules, the derivatives having 17-24 contiguous base pairs of original 25 contiguous base pairs of the identified molecules or one or more base pairs in addition to the original 25 contiguous base pairs of the identified molecules.
PCT/US2016/050590 2015-09-08 2016-09-07 Sirna/nanoparticle formulations for treatment of middle-east respiratory syndrome coronaviral infection WO2017044507A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US15/758,312 US11058779B2 (en) 2015-09-08 2016-09-07 Sirna/nanoparticle formulations for treatment of middle-east respiratory syndrome coronaviral infection
US17/373,361 US20220145301A1 (en) 2015-09-08 2021-07-12 siRNA/Nanoparticle Formulations for Treatment of Middle-East Respiratory Syndrome Coronaviral Infection

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201562215565P 2015-09-08 2015-09-08
US62/215,565 2015-09-08

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US15/758,312 A-371-Of-International US11058779B2 (en) 2015-09-08 2016-09-07 Sirna/nanoparticle formulations for treatment of middle-east respiratory syndrome coronaviral infection
US17/373,361 Continuation US20220145301A1 (en) 2015-09-08 2021-07-12 siRNA/Nanoparticle Formulations for Treatment of Middle-East Respiratory Syndrome Coronaviral Infection

Publications (2)

Publication Number Publication Date
WO2017044507A2 true WO2017044507A2 (en) 2017-03-16
WO2017044507A3 WO2017044507A3 (en) 2017-05-26

Family

ID=58239928

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2016/050590 WO2017044507A2 (en) 2015-09-08 2016-09-07 Sirna/nanoparticle formulations for treatment of middle-east respiratory syndrome coronaviral infection

Country Status (2)

Country Link
US (2) US11058779B2 (en)
WO (1) WO2017044507A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210246448A1 (en) * 2020-01-23 2021-08-12 Sirnaomics, Inc. COMPOSITION AND METHODS OF RNAi PROPHYLACTICS AND THERAPEUTICS FOR TREATMENT OF SEVERE ACUTE RESPIRATORY INFECTION CAUSED BY 2019 NOVEL CORONAVIRUS (2019-nCoV)
CN113528516A (en) * 2020-04-17 2021-10-22 北京瑞博开拓医药科技有限公司 Nucleic acid, pharmaceutical composition containing nucleic acid, siRNA conjugate, preparation method and application

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10421970B2 (en) 2004-05-12 2019-09-24 Thermo Fisher Scientific Inc. Methods and compositions for selecting siRNA of improved functionality
JP2016534087A (en) 2013-10-22 2016-11-04 リペラ ファーマシューティカルズ, インコーポレイテッド Drug delivery using metastable liposomes
KR102405727B1 (en) 2020-01-22 2022-06-07 한국한의학연구원 System for screening of agent for treating coronavirus disease
WO2021183897A1 (en) * 2020-03-13 2021-09-16 The Translational Genomics Research Institute Methods and kits for the detection of mers-cov
US20230323353A1 (en) * 2020-03-25 2023-10-12 City Of Hope Antisense rna for treatment of sars-associated coronavirus
WO2022020242A1 (en) 2020-07-20 2022-01-27 Enanta Pharmaceuticals, Inc. Functionalized peptides as antiviral agents
CN112029781B (en) * 2020-08-14 2023-01-03 中山大学 Novel coronavirus SARS-CoV-2 safety replicon system and application thereof
US11352363B1 (en) 2020-11-23 2022-06-07 Enanta Pharmaceuticals, Inc. Spiropyrrolidine derived antiviral agents
US11384090B2 (en) 2020-11-23 2022-07-12 Enanta Pharmaceuticals, Inc. Spiropyrrolidine derived antiviral agents
US20220333108A1 (en) * 2021-04-01 2022-10-20 Sirnaomics, Inc. Combinations of sirnas with sirnas against sulf2 or gpc3 for use in treating cancer
US11319325B1 (en) 2021-05-11 2022-05-03 Enanta Pharmaceuticals, Inc. Macrocyclic spiropyrrolidine derived antiviral agents
US11339170B1 (en) 2021-07-23 2022-05-24 Enanta Pharmaceuticals, Inc. Spiropyrrolidine derived antiviral agents
US11325916B1 (en) 2021-07-29 2022-05-10 Enanta Pharmaceuticals, Inc. Spiropyrrolidine derived antiviral agents
US11919910B2 (en) 2021-11-12 2024-03-05 Enanta Pharmaceuticals, Inc. Spiropyrrolidine derived antiviral agents
US11858945B2 (en) 2021-11-12 2024-01-02 Enanta Pharmaceuticals, Inc. Alkyne-containing antiviral agents
US11912714B2 (en) 2021-11-12 2024-02-27 Enanta Pharmaceuticals, Inc. Spiropyrrolidine derived antiviral agents

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1812016A4 (en) * 2004-11-17 2010-07-14 Univ Maryland HIGHLY BRANCHED HK PEPTIDES AS EFFECTIVE CARRIERS OF siRNA
US7368370B2 (en) * 2005-06-15 2008-05-06 The University Of Connecticut Site-specific nanoparticle self-assembly
WO2008118809A1 (en) * 2007-03-23 2008-10-02 Ibis Biosciences, Inc. Compositions for use in identification of mixed populations of bioagents
WO2011109698A1 (en) * 2010-03-04 2011-09-09 Rxi Pharmaceuticals Corporation Formulations and methods for targeted delivery to phagocyte cells
US20110269735A1 (en) * 2010-04-19 2011-11-03 Celera Corporation Genetic polymorphisms associated with statin response and cardiovascular diseases, methods of detection and uses thereof
WO2015057966A2 (en) * 2013-10-16 2015-04-23 Samuel Bogoch THERAPIES, VACCINES, AND PREDICTIVE METHODS FOR MIDDLE EAST RESPIRATORY SYNDROME VIRUS (MERS CoV)
CA2932055A1 (en) * 2013-11-29 2015-06-04 The Trustees Of The University Of Pennsylvania Mers-cov vaccine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210246448A1 (en) * 2020-01-23 2021-08-12 Sirnaomics, Inc. COMPOSITION AND METHODS OF RNAi PROPHYLACTICS AND THERAPEUTICS FOR TREATMENT OF SEVERE ACUTE RESPIRATORY INFECTION CAUSED BY 2019 NOVEL CORONAVIRUS (2019-nCoV)
CN113528516A (en) * 2020-04-17 2021-10-22 北京瑞博开拓医药科技有限公司 Nucleic acid, pharmaceutical composition containing nucleic acid, siRNA conjugate, preparation method and application

Also Published As

Publication number Publication date
US20190030187A1 (en) 2019-01-31
US20220145301A1 (en) 2022-05-12
US11058779B2 (en) 2021-07-13
WO2017044507A3 (en) 2017-05-26

Similar Documents

Publication Publication Date Title
US20220145301A1 (en) siRNA/Nanoparticle Formulations for Treatment of Middle-East Respiratory Syndrome Coronaviral Infection
Wang et al. SARS-CoV-2: structure, biology, and structure-based therapeutics development
US20210246448A1 (en) COMPOSITION AND METHODS OF RNAi PROPHYLACTICS AND THERAPEUTICS FOR TREATMENT OF SEVERE ACUTE RESPIRATORY INFECTION CAUSED BY 2019 NOVEL CORONAVIRUS (2019-nCoV)
Mehta et al. siRNA therapeutics against respiratory viral infections—What have we learned for potential COVID‐19 therapies?
US20230108926A1 (en) COMPOSITION AND METHOD OF mRNA VACCINES AGAINST NOVEL CORONAVIRUS INFECTION
US9790509B2 (en) 5′-triphosphate oligoribonucleotides
WO2021259244A1 (en) Shrna for inhibiting replication of sars-cov-2 virus and application of shrna
US20230203137A1 (en) Preparation method of artificial antibody
WO2018160690A1 (en) Rna pharmaceutical formulations for prophylactic and therapeutic treatment of zika virus infection
Raghav et al. Potential treatments of COVID-19: Drug repurposing and therapeutic interventions
Wilson et al. Nanomedicine to deliver biological macromolecules for treating COVID-19
US20170233742A1 (en) Compositions Comprising Small Interfering RNA Molecules for Prevention and Treatment of Ebola Virus Disease
JP2023532735A (en) Recombinant enteroviruses and their uses
EP4175654A1 (en) Antisense oligonucleotides targeting sars-cov-2
CN115120608A (en) siRNA drug, drug composition, siRNA-small molecule drug conjugate and application thereof
US9868952B2 (en) Compositions and methods for “resistance-proof” SiRNA therapeutics for influenza
Aljaberi et al. siRNA as a potential therapy for COVID-19
EP4015634A1 (en) Sirna and compositions for prophylactic and therapeutic treatment of virus diseases
Zhang et al. Intranasal delivery of replicating mRNA encoding hACE2-targeting antibody against SARS-CoV-2 Omicron infection in the hamster
CN115811983A (en) Compositions and methods relating to antiviral therapeutics
WO2024078597A1 (en) Rsv f protein variants and uses thereof
US20230272400A1 (en) SYNTHESIS METHOD OF TARGETED DRUG nCoVshRNA 2ACE2
WO2021255262A1 (en) siRNA AND COMPOSITIONS FOR PROPHYLACTIC AND THERAPEUTIC TREATMENT OF VIRUS DISEASES
CA3169647A1 (en) Methods and compositions for treating sars-cov-2 infection
Jose SARS-CoV neutralizing assay Sera collected from vaccinated mice were inactivated by incubation at 56 C for 30 min. The serially diluted mice sera (up to five-fold) were incubated with 100 TCID, of SARS

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16844990

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16844990

Country of ref document: EP

Kind code of ref document: A2