WO2022191377A1 - Sars-cov-2 예방 백신 조성물 - Google Patents
Sars-cov-2 예방 백신 조성물 Download PDFInfo
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- WO2022191377A1 WO2022191377A1 PCT/KR2021/016460 KR2021016460W WO2022191377A1 WO 2022191377 A1 WO2022191377 A1 WO 2022191377A1 KR 2021016460 W KR2021016460 W KR 2021016460W WO 2022191377 A1 WO2022191377 A1 WO 2022191377A1
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Definitions
- the present invention relates to a vaccine composition for preventing SARS-CoV-2, and more particularly, to a vaccine composition for preventing SARS-CoV-2 comprising mRNA encoding an S-mutant antigen of SARS-CoV-2 virus.
- Coronavirus coronavirus
- RNA virus ribonucleic acid
- It causes respiratory and digestive system infections in humans and animals. Mainly, it is easily infected by mucosal infection, droplet transmission, etc. In humans, it usually causes mild respiratory infections, but rarely causes fatal infections.
- Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which is currently causing a pandemic, is a single-stranded RNA with positive sense in genetic sequencing As a coronavirus, it is contagious to humans and is the cause of coronavirus disease 2019 (COVID-19).
- SARS-CoV-2 virus uses a surface spike protein to induce airway epithelial cells, alveolar epithelial cells, vascular endothelial cells, and macrophages in the lungs. (macrophage) It binds to ACE2 (angiotensin-converting enzyme 2) present on the surface and invades the host cell.
- ACE2 angiotensin-converting enzyme 2
- SARS-CoV-2 As a result of the genomic sequence study of SARS-CoV-2, a receptor-binding domain (RBD) having a very similar tertiary structure to SARS-CoV was identified in the spike protein, and the RBD of SARS-CoV-2 is SARS-CoV It was speculated that the infectivity of SARS-CoV-2 was stronger than that of SARS-CoV because of its higher binding to ACE2 compared to RBD of RBD (Mattew ZT et al ., Natrue reviews immunology, 20:363-374, 2020).
- RBD receptor-binding domain
- the spike protein is composed of two proteins, S1 and S2, of which the S1 protein is composed of an amino-terminal domain and RBD.
- RBD binds to ACE2
- the SARS-CoV-2 virion enters the endosome of the cell through endocytosis, and then the fusion peptide is exposed and inserted into the membrane of the host cell.
- the S2 protein consists of a fusion peptide region (FP region) and heptad repeat regions (HR1, HR2), and HR1 and HR2 are fused to the virus membrane in the form of contact with each other to form SARS-CoV-2. Virions are released out of the host cell.
- S1 and S2 have different cleavage sites and are separated by their respective proteases to cause SARS-CoV-2 infection.
- a therapeutic agent and vaccine for SARS-CoV-2 are being developed using a strategy that disrupts the binding between the protein and the virus (Mattew ZT et al ., Natrue reviews immunology, 20:363-374, 2020).
- the spike protein of SARS-CoV-2 is unstable in its protein structure, it prevents misfolding or triggering through proline substitution for 986 (K) and 987 (V), resulting in a more prefusion-stabilized viral glycoprotein.
- the characteristic of acting as an excellent immunogen was confirmed through previous studies of MERS-CoV and SARS-CoV (Jesper Pallesen et al . PNAS, 2017, DOI: https://doi.org/10.1073/PNAS.1707304114) .
- SARS-CoV-2 has been mutated from 'type D (D614)' that started in Wuhan to 'type G (G614)' based on 'European type' or global initiative on sharing avian influenza data (GISAID).
- Type mutation is characterized in that amino acid 614 of the virus surface spike protein is mutated from aspartic acid (GAT; Asp, D) to glycine (GGT; Gly, G) (Fig. 1) (Plante, JA et al. Nature (Plante, JA et al. 2020).DOI: https://doi.org/10.1038/s41586-020-2895-3).
- gene therapy and gene vaccine are technologies that have already been proven and applied in the pharmaceutical field, and can be treated not only for genetic diseases, but also for autoimmune diseases, infectious diseases, cancer or tumor-related diseases, and inflammatory diseases.
- DNA and DNA can be used as nucleic acid molecules for gene administration, and it is known that DNA is relatively stable and tractable compared to RNA.
- RNA Ribonucleic acid
- a potential risk may arise if the administered DNA-fragment into the patient's genome is inserted at an unwanted location, resulting in damage to the gene. Additionally, unwanted anti-DNA antibodies may appear, and another problem is that the expression levels of peptides or proteins expressed by DNA administration and subsequent transcription/translation are limited.
- RNA The level of the peptide or protein to be used is also limited.
- RNA when used as a tool for gene administration, RNA does not require transcription, so proteins can be synthesized directly in the cytoplasm without having to enter the nucleus like DNA. no worries In addition, it does not induce long-term genetic modification due to its short half-life compared to DNA (Sayour EJ, et al ., J Immunother Cancer 2015;3:13, 2015).
- a general RNA vaccine When a general RNA vaccine is delivered into a cell, it is activated for a short time to express the target protein, and is destroyed by an enzymatic reaction within a few days, and a specific immune response to the expressed target antigen (protein) remains.
- RNA when RNA is used as a tool for gene administration, the target protein can be expressed in the same amount as DNA even when using a smaller amount than DNA because it does not need to pass through the nuclear membrane and acts only when it passes through the cell membrane. .
- RNA itself since RNA itself has immunoreinforcing properties, the same immune effect can be seen even when administered in a small amount compared to DNA.
- RNA is a fairly unstable molecular species that can be readily degraded by ubiquitous RNases.
- nucleic acid-based therapeutics have enormous potential, but in order to realize this potential, it is necessary to effectively deliver nucleic acids to appropriate sites within a cell or organism.
- RNA is susceptible to degradation by nucleases in plasma.
- free RNA has limited ability to access intracellular compartments where the translation machinery to translate it exists.
- the introduction of lipid nanoparticles formed from cationic lipids and other lipid components such as neutral lipids, cholesterol, PEG, pegylated lipids and oligonucleotides has been attempted to block the degradation of RNA in plasma and promote cellular uptake of nucleic acids. have.
- the present inventors have made intensive efforts to develop a vaccine against SARS-CoV-2 with excellent storage stability and excellent in vivo immunogenicity.
- the mutant antigen for the spike protein of SARS-CoV-2 is encoded Developing an mRNA vaccine in which a nucleic acid is mounted on a lipid nanoparticle (LNP) or liposome having a specific lipid composition, confirming that the vaccine exhibits excellent stability and high immunogenicity in vivo, and the present invention was completed.
- LNP lipid nanoparticle
- the present invention provides a vaccine composition for preventing SARS-CoV-2 comprising mRNA encoding the S antigen of SARS-CoV-2 virus.
- the vaccine composition according to the present invention may further include liposomes or lipid nanoparticles, and the liposomes or lipid nanoparticles may include cationic lipids, neutral lipids and cholesterol.
- the present invention also provides a method for preventing SARS-CoV-2 infection comprising administering a composition for preventing SARS-CoV-2 comprising mRNA encoding the S antigen of SARS-CoV-2 virus.
- the present invention also provides the use of a composition comprising mRNA encoding the S antigen of the SARS-CoV-2 virus for the prevention of SARS-CoV-2 infection.
- the present invention also provides the use of a composition for preventing SARS-CoV-2 comprising mRNA encoding the S antigen of the SARS-CoV-2 virus for the preparation of a medicament for the prevention of SARS-CoV-2 infection.
- D614 D-type (D614) and G-type (G614) mutations of SARS-CoV-2.
- Figure 2 shows the results of confirming the delivery efficiency of liposomes with different lipid composition in the mouse material.
- mice 3 shows the mRNA expression efficiency in mice according to the mixing ratio of mRNA and liposome in the mRNA-ribosome complex.
- Figure 4 shows the results of confirming whether the formulation obtained by mixing CV-LP-b1 with CV-SF-614Gm is normally expressed in HEK293T cells.
- Figure 4A shows the expression of SARS-CoV-2 Spike protein after CV-SF-614Gm was treated in HEK293 cells by concentration using lipofectamine
- Figure 4B is a mixture of CV-LP-b1 and CV-SF-614Gm, After the mRNA complex prepared by freeze-drying was treated in HEK293T cells, the expression of SARS-CoV-2 Spike protein was confirmed.
- Figure 5A shows the antibody titer of RBD-specific IgG analyzed by ELISA in the serum of mice administered with the mRNA complex mixed with CV-SF-614Gm to CV-LP-b
- Figure 5B is to CV-LP-b1 Splenocytes isolated from mice administered with the mRNA complex mixed with CV-SF-614Gm were stimulated with S1 peptide, and the concentration of IFN- ⁇ secreted in the medium was analyzed by ELISA.
- This shows the ability to form neutralizing antibodies analyzed using the CoV-2 surrogate virus neutralization test (sVNT) Kit.
- sVNT CoV-2 surrogate virus neutralization test
- Figure 6A shows the antibody titers of RBD-specific IgG analyzed by ELISA in the serum of mice administered single or twice the mRNA complex mixed with CV-SF-614Gm to CV-LP-b1
- Figure 6B is CV- Splenocytes of mice administered single or twice administration of the mRNA complex mixed with CV-SF-614Gm with LP-b1 were isolated, stimulated with S1 peptide, and the concentration of IFN- ⁇ secreted in the medium was analyzed by ELISA
- Fig. 6C shows the neutralizing antibody-forming ability of the obtained serum analyzed using the SARS-CoV-2 surrogate virus neutralization test (sVNT) Kit.
- sVNT SARS-CoV-2 surrogate virus neutralization test
- FIG. 7A shows the antibody values of RBD-specific IgG analyzed by ELISA in the serum of mice administered with L-EG-COVID, a liquid formulation, and F-EG-COVID, a freeze-dried formulation, after 0 weeks, 4 weeks, and 8 weeks refrigeration.
- FIG. 7B is ELISA analysis of the concentration of IFN- ⁇ secreted in the medium after stimulation of the splenocytes of mice immunized with the above method with S1 peptide
- FIG. 7C is the SARS-CoV serum obtained above.
- 8A and 8B show the results of confirming the distribution of CV-SF-614Gm in the body over time after EG-COVID was administered to the rat by the intramuscular route.
- A is the IC50 of EG-COVID based on the SARS-CoV-2 (NCCP 43326) virus infection inhibition rate according to the CV-SF-614Gm mRNA concentration. It shows the result of deriving the values, and B shows the IC 50 values of EG-COVID for the alpha-mutant virus and the beta-mutant virus.
- the present invention relates to a vaccine composition for preventing SARS-CoV-2 comprising mRNA encoding the S antigen of SARS-CoV-2 virus.
- the S antigen of SARS-CoV-2 virus is used as a concept including a wild-type S antigen and a variant S antigen containing one or more amino acid mutations.
- the S antigen of SARS-CoV-2 virus in the present invention uses the 614G variant of the spike protein as a backbone to stabilize the structure of the spike protein, and additionally 986 (K) and 987 (V) are converted to proline.
- RRAR which is an amino acid sequence of 682 to 685, is substituted with QQAQ (CV-SF-614Gm) is preferred, but is not limited thereto.
- sequence optimization was performed in order to increase the content of guanine and cytosine in the mRNA encoding the S antigen of SARS-CoV-2 virus to stabilize the mRNA and increase the translation efficiency in humans.
- RNA fold, RNA fold thermodynamic ensemble, RNA structure, and thermodynamic energy of cofold were confirmed, and based on the results, CV-SF-WT-614D (SARS-CoV-2 spike protein The coding mRNA, SEQ ID NO: 1) and CV-SF-614Gm (mRNA encoding the spike protein of the SARS-CoV-2 614G variant, SEQ ID NO: 2) were selected (Table 1).
- the vaccine composition of the present invention may further contain liposomes or lipid nanoparticles (LNP), and the mRNA encoding the S antigen of SARS-CoV-2 virus is adsorbed to the outside of the liposomes or lipid nanoparticles. ) or associative, or encapsulated or encapsulated therein.
- LNP liposomes or lipid nanoparticles
- the liposomes or lipid nanoparticles contained in the vaccine composition of the present invention include cationic lipids, and preferably may additionally include neutral lipids.
- the cationic lipid is dimethyldioctadecylammonium bromide (DDA), C12-200, 1,2-dioleoyl-3-trimethylammonium propane (DOTAP), 3 ⁇ -[N-(N′,N′-dimethyl) Aminoethane carbamoyl cholesterol (3 ⁇ -[N-(N′,N′-dimethylaminoethane) carbamoyl cholesterol, DC-Chol), 1,2-dioleoyloxy-3-dimethylammonium propane (DODAP), 1,2 -di-O-octadecenyl-3-triethylammonium propane (1,2-di-O-octadecenyl-3-trimethylammonium propane, DOTMA), 1,2-dimyristoreoyl-sn-glycero- 3-ethylphosphocholine (1,2-dimyristoleoyl-sn-glycero-3-ethyl
- cationic liposomes are generally known to be toxic, in the case of the vaccine composition according to the present invention, the toxicity is eliminated by adsorption of mRNA (Filion, M. C., & Phillips, N. C., Biochimica et Biophysica Acta (BBA)) - Biomembranes, 1329(2), 345-356. 1997).
- Liposomes or lipid nanoparticles comprising a cationic lipid according to the present invention may additionally include a neutral lipid.
- the neutral lipid is 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine (1,2-dioleoyl-sn-glycero-3-phosphoethanolamine, DOPE), 1,2-dimyristoyl- sn-glycero-3-phosphatidylcholine (1,2-Dimyristoyl-sn-glycero-3-phosphorylcholine, DMPC), 1,2-dioleoyl-sn-glycero-3-phosphocholine (1,2-dioleoyl) -sn-glycero-3-phosphocholine, DOPC), 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (1,2-dipalmitoyl-sn-glycero-3-phosphocholine, DPPC), 1, 2-distearoyl-sn-glycero-3-phosphocholine (1,2-distearoyl-sn-glycero-3-phosphocholine, DSPC
- protamine, albumin, transferrin, protein transduction domains (PTD), cell penetrating peptide (CPP), polyethylene glycol (PEG), pegylated lipid, metal ion-coupled lipid and macrophage targeting moiety are additionally added to the liposome or lipid nanoparticle according to the present invention.
- PTD protein transduction domains
- CPP cell penetrating peptide
- PEG polyethylene glycol
- pegylated lipid pegylated lipid
- metal ion-coupled lipid and macrophage targeting moiety are additionally added to the liposome or lipid nanoparticle according to the present invention.
- One or more delivery factors selected from the group consisting of may be further included.
- DOTAP Dioleoyl-3-trimethylammonium propane
- DOTAP Dioleoyl-3-trimethylammonium propane
- DOPE 1,2-Dioleoyl-sn-glycero-3-phosphoethanolamine
- the weight ratio of the cationic lipid to the neutral lipid is 1:9 to 9.5:0.5, preferably 2:8 to 9:1, more preferably 3:7 to 8: 2, most preferably 4:6 to 7:3.
- cholesterol may be further included in the liposome or lipid nanoparticles according to the present invention.
- the weight ratio of cationic lipid to cholesterol is 6:1 to 1:3, preferably 4:1 to 1:2.5, more preferably 3:1 to 1:2, Most preferably, it may be 2.5:1 to 1:1.5, but is not limited thereto.
- the weight ratio of cationic lipid, neutral lipid and cholesterol is 1 to 9.5: 0.5 to 9 : 0.05 to 3, preferably 3 to 8: 7 to 1: 0.45 to 7.0, more preferably 1 to 3.5: 1 to 3.5: 0.5 to 3, but is not limited thereto.
- the weight ratio of cationic lipid, neutral lipid and cholesterol was 2:2:1 (40:40:20 w/w/w), but is not limited thereto.
- cholesterol is additionally included, for example, when DOTAP:DOPE is used in a weight ratio of 1:1, cholesterol is mixed with DOTAP in a weight ratio of 0.2 to 0.85, preferably 0.4 to 0.6 to form liposomes or lipid nanoparticles. can be manufactured.
- the mixing ratio of liposomes or lipid nanoparticles and mRNA can be expressed as an N:P ratio, and depending on the N:P ratio, mRNA expression and stability of the composition are affected. affect
- the N:P ratio of the liposome or lipid nanoparticles and the mRNA may be 0.2:1 to 1.4:1, preferably 0.23:1 to 1.0:1. and more preferably 0.46:1 to 1.0:1, and in the present invention, an N:P ratio of 0.6:1 was used as an example.
- the vaccine composition of the present invention may further include an adjuvant, but it is not essential, and exhibits sufficient vaccine effect even in the absence of an adjuvant.
- Immune enhancers usable in the present invention correspond to the pathogen-associated molecular pattern (PAMP) and respond to the pattern recognition receptor (PRR), CpG DNA, lipoprotein, flagella, poly I: It is characterized in that it is an immune enhancer selected from the group consisting of C, saponin, squalene, tricaprin, 3D-MPL, and non-toxic lipooligosaccharide (dLOS), but is not limited thereto.
- the non-toxic lipooligosaccharide (detoxied lipooligosaccharide, dLOS) may be a substance disclosed in Korean Patent No. 1509456 or Korean Patent No. 2042993, but is not limited thereto.
- lipid nanoparticles also referred to as LNPs, refers to particles having at least one scale on the order of nanometers (eg, 1 to 1,000 nm) comprising one or more lipids.
- such lipid nanoparticles comprise cationic lipids and one or more excipients selected from neutral lipids, charged lipids, steroids and polymer conjugated lipids.
- the mRNA or portion thereof is encapsulated in the lipid portion of the lipid nanoparticle, or in an aqueous space surrounded by some or all of the lipid portion of the lipid nanoparticle, resulting in enzymatic degradation or mechanisms of the host organism or cell, such as , protects the mRNA or a portion thereof from other unwanted effects induced by negative immune responses.
- the mRNA or portion thereof is associated with a lipid nanoparticle.
- lipid nanoparticles are not limited to any particular form, for example, in an aqueous environment and/or in the presence of a nucleic acid compound, cationic lipids or ionic lipids, and optionally one or more additional lipids. It should be construed to include any form created when combined. For example, liposomes, lipid complexes, lipoplexes, and the like are within the scope of lipid nanoparticles.
- the lipid nanoparticles are from about 30 nm to about 400 nm, from about 50 nm to about 400 nm, from about 70 nm to about 400 nm, from about 90 nm to about 400 nm, from about 110 nm to about 400 nm, from about 130 nm to about 400 nm, about 150 nm to about 400 nm, about 200 nm to about 400 nm, about 250 nm to about 400 nm, about 300 nm to about 400 nm, about 350 nm to about 400 nm, about 70 to about 90 nm, about 80 nm to about 90 nm, about 70 nm to about 80 nm, or about 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 90 nm, 100 nm, 110 nm, 120 nm, 130 nm , 140 nm, 150 nm, 160 n
- LNPs may comprise any lipid capable of forming a particle to which one or more nucleic acid molecules are attached or to which one or more nucleic acid molecules are encapsulated.
- lipid refers to a group of organic compounds that are derivatives (eg, esters) of fatty acids and are generally characterized as insoluble in water but soluble in many organic solvents. Lipids are usually divided into at least three classes: (1) “simple lipids", which include fats and oils as well as waxes; (2) “complex lipids” comprising phospholipids and glycolipids; and (3) "derived lipids” such as steroids.
- LNP comprising mRNA comprises at least one cationic lipid and at least one stabilizing lipid as defined herein.
- Stabilizing lipids include neutral lipids and pegylated lipids.
- LNPs include cationic lipids.
- Cationic lipids are preferably characterized as being cationizable. That is, cationic lipids become protonated as the pH is lowered below the pKa of the ionizable groups of the lipid, but are progressively more neutral at higher pH values. When positively charged, these lipids can associate with negatively charged nucleic acids.
- the cationic lipid comprises a zwitterionic lipid that becomes positively charged upon decreasing pH.
- LNPs may comprise any lipid capable of forming a particle to which one or more nucleic acid molecules are attached or to which one or more nucleic acid molecules are encapsulated.
- LNPs can include any additional cationic or cationizable lipids, i.e., any of a number of lipid species that retain a net positive charge at a selective pH, such as physiological pH. have.
- the present invention also provides a method for preparing a vaccine composition for preventing SARS-CoV-2 according to the present invention.
- the method for preparing a vaccine composition for preventing SARS-CoV-2 according to the present invention is a solution or buffer containing mRNA encoding the S antigen of SARS-CoV-2 virus or a solution or buffer containing the same, and liposomes or lipid nanoparticles. characterized by adding
- the mRNA, liposome, or lipid nanoparticles encoding the SARS-CoV-2 virus S antigen may be provided in the form of a lyophilized powder or dissolved in an appropriate solution or buffer.
- mRNA, liposome or lipid nanoparticles encoding SARS-CoV-2 virus S antigen are provided in a lyophilized state, they are dissolved in an appropriate solution or buffer, By adding a solution or buffer containing liposomes or lipid nanoparticles to mRNA or a solution or buffer containing the same, the vaccine composition for preventing SARS-CoV-2 according to the present invention can be prepared.
- the vaccine composition for preventing SARS-CoV-2 according to the present invention may be prepared by adding a solution or buffer containing the same, and adding a solution or buffer containing liposomes or lipid nanoparticles.
- dLOS may be provided in the form of a lyophilized powder or dissolved in an appropriate solution or buffer. When dLOS is provided in a lyophilized state, it can be used by dissolving it in an appropriate solution or buffer.
- F-EG-COVID a freeze-dried formulation of EG-COVID, a vaccine for preventing SARS-CoV-2 according to the present invention
- the cationic liposome used in the present invention is known to have a depot effect (Therapeutic Advances in Vaccines 2(6):159-82), and in another aspect of the present invention, the cationic liposome is used as a carrier SARS- EG-COVID, a vaccine for preventing CoV-2, was administered to the left femoral muscle of the rat, and the expression of CV-SF-614G mRNA in the rat serum and each tissue was confirmed over time. It was confirmed that CV-SF-614G mRNA was expressed only at the site where it was used ( FIG. 8 ).
- the EG-COVID of the present invention exhibited excellent cross-immune effects against SARS-CoV-2 mutants, alpha mutants and beta mutants (FIG. 9B).
- the present invention relates to a method for preventing SARS-CoV-2 infection, comprising administering a composition for preventing SARS-CoV-2 comprising mRNA encoding the S antigen of SARS-CoV-2 virus. .
- the present invention relates to the use of a composition comprising mRNA encoding the S antigen of said SARS-CoV-2 virus for the prevention of SARS-CoV-2 infection.
- the present invention relates to the use of a composition for preventing SARS-CoV-2 comprising mRNA encoding the S antigen of the SARS-CoV-2 virus for the manufacture of a medicament for the prevention of SARS-CoV-2 infection.
- a composition for preventing SARS-CoV-2 comprising mRNA encoding the S antigen of the SARS-CoV-2 virus for the manufacture of a medicament for the prevention of SARS-CoV-2 infection.
- the mRNA sequence is a sequence in which 986 (K) and 987 (V) are substituted with proline to stabilize the structure of the spike protein, and RRAR, the amino acid sequence of 682 to 685, is mutated to QQAQ (CV-SF-614Gm) was used to code.
- thermodynamic energy of RNA fold, RNA fold thermodynamic ensemble, RNA structure, and cofold was confirmed.
- the lower the ⁇ G the more thermodynamically stable.
- CV-SF-WT-614D mRNA coding for SARS-CoV-2 spike protein, SEQ ID NO: 1
- CV-SF-614Gm coding for the spike protein of SARS-CoV-2 614G variant
- the selected mRNA sequence was synthesized through in vitro transcription at the request of TriLink BioTechnologies.
- the DNA sequences of CV-SF-WT-614D and CV-SF-614Gm are shown in SEQ ID NO: 3 and SEQ ID NO: 4, respectively, and the amino acid sequences of CV-SF-WT-614D and CV-SF-614Gm are shown in SEQ ID NO: 5, respectively and SEQ ID NO: 6.
- Example 2 Preparation of a liposome delivery system using the film method
- DOTAP Merck & Cie/CH2900014
- DOPE Advanti Polar Lipid
- cholesterol Advanti Polar Lipid
- the liquid solution was mixed in a constant weight ratio in a round-bottom flask to make a lipid mixture, and in a rotary evaporator (Buchi/B491_R200), the lipid mixture containing DOTAP was volatilized at 60 ° C. for 30 minutes to blow off chloroform, and the flask wall A lipid film film was prepared on
- cholesterol was added to DOTAP/DMPC, which is a constituent lipid of cationic liposomes applied to the conventional herpes zoster vaccine (EG-HZ), or DMPC was added to 1
- DOTAP/DMPC a constituent lipid of cationic liposomes applied to the conventional herpes zoster vaccine (EG-HZ)
- DMPC was added to 1
- ⁇ DOPE ⁇ replacing ,2-Dioleoyl-sn-glycero-3-phosphoethanolamine
- 2nd group DOTAP/DMPC/Chol (40:40:20, w/w/w)
- 3rd group DOTAP/DOPE (50:50, w/w)
- IVIS in vivo imaging system
- Dynamic light scattering (DLS) analysis was performed using Malvern/ZSP for liposome CV-LP-b1 mixed in 20 mM HEPES buffer (pH 7.4) containing 4% sucrose to determine particle size, dispersion, and zeta potential. Mean and standard deviation were derived.
- the average particle size of CV-LP-b1 was 80.3 ⁇ 3.0 d. nm, dispersion was measured to be 0.194 ⁇ 0.010, and zeta potential was measured to be 50.7 ⁇ 3.0 mV.
- the size of a typical liposome is 50 - 250 d.
- the size of the liposome was at an appropriate level, and when the zeta potential of the liposome was positively charged, aggregation did not occur and the structure was stably maintained when it was 30 mV or more.
- Known Antisense drug technology; Principles, Strategy, and Application, CRC press, second edition, 253, 2007
- the zeta potential of the liposome has been analyzed beyond that, so it can be inferred that it is electrostatically stable.
- mRNA liposome complex was prepared by mixing and adsorbing the liposomes (LP) and mRNA prepared in Examples 1 and 2 in 20 mM HEPES (pH 7.4) containing 4% sucrose as main components.
- the N/P ratio which is the mixing ratio of the liposome and mRNA, was calculated by the following formula, and the prepared complexes were EGFP mRNA-liposome complex of SEQ ID NO: 8, RLuc mRNA-liposome complex of SEQ ID NO: 7, and CV- of SEQ ID NO: 2 It is an mRNA-liposome complex of SF-614Gm, and was used for DLS, in vivo expression and immunogenicity experiments, respectively.
- the mRNA-liposome complex was prepared by varying the ratio of NP to mRNA forming a complex with the liposome, and in vivo expression of the mRNA-liposome complex was confirmed using a mouse.
- the mRNA complex expressing Rluc was intramuscularly administered (intramuscular injection) into the deltoid muscle of the placenta at a dose of 100 ⁇ l.
- mice After 6 hours of test substance administration, anesthetize by intraperitoneally administering Avertin working solution at 250 mg/kg, and add 2.4 mL of 1X PBS to Renilla luciferase substrate stock solution (0.37 mg/vial, Promega) to make 0.15 mg/mL, then 1 mg /kg was administered intravenously (intravenous injection).
- mice were photographed by setting the exposure time to 60 seconds using Ami-HTX (Spectral Instruments Imaging, USA) (xenogen IVIS-200), and using Aura Imaging Software (Spectral Instruments Imaging, USA), The degree of expression was quantified.
- the mRNA expression efficiency in mice increased when the NP ratio was 0.23 or higher, and the expression was highest in the range of 0.46:1 to 1.0:1.
- HEK293T cells Homo sapiens embryonic kidney 293T cell, CRL-3216/ATCC
- HEK293T cells Homo sapiens embryonic kidney 293T cell, CRL-3216/ATCC
- CV-SF-614Gm lipofectamine 3000 (Thermo Fisher) and CV-LP-b1 were mixed and the cells were treated at 37° C., CO 2 in an incubator for 24 hours.
- Antibodies used for Western blotting were as follows.
- SARS-CoV-2 antibody [NB100-56578/Novus biologicals/ab092903c-15, (immunogen; SARS-CoV-2, amino acid 1124-1140 from S2 protein)]
- SARS-CoV-2 antibody [40591-MM42/Sino biological/HA14AP3001, (immunogen; SARS-CoV-2 S1-mFC protein)]
- mice 6-week-old female B6C3F1/slc mice (Japan SLC) were selected as target animals, and different mRNA doses were mixed with CV-LP-b1 to obtain 0.1HD (human dose). After administration to mice twice at 3-week intervals, the mice were sacrificed 2 weeks after the final immunization and serum was separated, and SARS-CoV-2 receptor binding domain (hereinafter 'RBD') protein specificity was performed by indirect ELISA method. The end-point titer was derived by analyzing the total IgG antibody titer (log10).
- the Avertin working solution was administered intraperitoneally at 250 mg/kg to anesthetize the mice, and the whole blood obtained through cardiac blood collection was collected.
- the collected whole blood was transferred to a microtube, left at room temperature for 3 hours, centrifuged at 4°C, 15,000 rpm for 10 minutes, and the supernatant was transferred to a new microtube to secure serum and stored at -20°C until analysis. kept.
- mice After sacrificing mice by cervical dislocation and excising the spleens, the spleens of each group were pooled and transferred to a 24-well plate in which 1% penicillin streptamine solution was added (hereinafter, PBS w/antibiotics).
- PBS w/antibiotics 1% penicillin streptamine solution was added
- splenocytes After washing the spleen tissue with PBS containing antibiotics in a clean bench, transfer it to a 60 mm dish containing 3 mL of basal media, and crush the tissue with a 40 ⁇ m cell strainer to obtain splenocytes (splenocytes). ) was isolated. After transferring the isolated splenocytes to a 15 mL tube, centrifuge at 4 °C and 3,000 rpm for 5 minutes, remove the supernatant, and treat the splenocytes with 3 mL of RBC lysis buffer (Thermo Fisher) at room temperature for 3 minutes. After standing, centrifugation was carried out at 4 °C and 3,000 rpm for 5 minutes.
- RBC lysis buffer Thermo Fisher
- the supernatant was removed and the cells were suspended in PBS containing 3 mL of an antibiotic, centrifuged at 4°C and 3,000 rpm for 5 minutes, the supernatant was removed, and then the cells were incubated in 10 mL of complete media (complete media, Gibco).
- the cell suspension was diluted to 2 X 10 7 cells/mL using a complete medium, and then dispensed to a 96-well cell culture plate at 100 ⁇ l/well.
- PepMix SARS-CoV-2-S1 peptide pool (JPT Peptide Technologies) and S2 peptide pool (JPT Peptide Technologies) were dissolved in 50 ⁇ l of DMSO in each vial, and then mixed with complete medium to a final concentration of 2.5 ⁇ g/mL.
- a SARS CoV-2 spike peptide stimulant was prepared by mixing.
- the immunoplate was covered with a sealing film and reacted in a reactor at 37 °C for 2 hours.
- the solution from each well was removed with an ELISA washer and washed 5 times using a wash buffer.
- the culture medium of the splenocytes stimulated by the splenocyte restimulation method of 6-2 is diluted 1/5 with a reagent diluent, and dispensed at 100 ⁇ l/well on a microplate coated with anti-mouse IFN- ⁇ capture antibody (Jackson), and a sealing film After standing for 2 hours at room temperature, the solution in each well was removed with an ELISA washer (Tecan/Hydroflexelisa) and washed 3 times using a wash buffer.
- TMB substrate KPL sureblue TMB microwell peroxidase substrate, Seracare
- 1N H2SO4 1N H2SO4
- FIG. 5A shows the antibody titer of RBD-specific IgG analyzed by ELISA in the serum of mice administered with the mRNA complex mixed with CV-SF-614Gm to CV-LP-b1, and the delivery power by adsorption up to 30 ⁇ g mRNA It was confirmed to be excellent
- FIG. 5B shows the IFN- ⁇ concentration analyzed by ELISA in the serum of mice administered with the mRNA complex mixed with CV-SF-614Gm to CV-LP-b1, and high IFN at 5 ⁇ g and 10 ⁇ g mRNA.
- FIG. 5C shows neutralizing antibody-forming ability analyzed by using the SARS-CoV-2 surrogate virus neutralization test (sVNT) kit in the obtained serum. indicated.
- sVNT SARS-CoV-2 surrogate virus neutralization test
- CV-LP-b1 had excellent delivery power by adsorption up to 300 ⁇ g mRNA, and mRNA of 50 ⁇ g or more was judged to be suitable for immune inducing ability.
- mRNA of 50 ⁇ g or more was judged to be suitable for immune inducing ability.
- IFN-gamma concentration it was found to be significantly superior at 5 to 10 ⁇ g.
- the experimental method was performed in the same manner as in Example 8, and the results are shown in FIG. 6, and it was confirmed that the immunogenicity including humoral and cellular properties was superior when administered twice rather than single administration.
- lipid nanoparticles hereinafter ⁇ LNP ⁇
- ⁇ LNP ⁇ lipid nanoparticles
- EG-COVID uses cationic liposomes, and in this example, L-EG-, a liquid formulation of cationic liposomes CV-LP-b1 and CV-SF-614Gm complex (EG-COVID) stored in a refrigerator for 8 weeks.
- L-EG- a liquid formulation of cationic liposomes CV-LP-b1 and CV-SF-614Gm complex
- EG-COVID a liquid formulation of cationic liposomes CV-LP-b1 and CV-SF-614Gm complex
- EG-COVID in this example was prepared to contain 100 ⁇ g of CV-SF-614Gm, and the freeze-dried formulation was rehydrated after a period of storage at -2 to 8° C. The immunogenicity test was conducted to confirm that the efficacy was maintained.
- a freeze-dried formulation was prepared by the following method.
- the vial was sealed with a rubber stopper and stored at 2-8°C.
- the COVID-19 prevention vaccine EG-COVID uses cationic liposomes as an mRNA delivery vehicle to efficiently deliver CV-SF-614Gm into the body.
- a previous study by the present inventors after intramuscular administration of Renilla luciferase-encoding mRNA and CV-LP-b1 into mice, the expression pattern of luciferase protein in the body was confirmed over time, and the administration site was administered from 6 hours to 24 hours. It was confirmed that the protein was expressed only in the liver and not in other organs.
- EG-COVID was administered to the left femoral muscle of the rat and then 0, 2, 6, 24, 48, 72 and 120 hours, respectively. Afterwards, it was confirmed through RT-qPCR whether CV-SF-614Gm was present in the body.
- test group As experimental animals, 105 6-week-old, male SD rats (Orient Bio) were used, and the test group is shown in Table 5.
- GAPDH primer and probe set (Thermo Fisher) were used as a reference gene with GAPDH from rat, and VIC dye was tagged at the 5' end of the primer.
- sample1 tissue-derived RNA
- TaqPath 1-step multiplex master mix hereinafter master mix, (Thermo Fisher) /A28523
- primer & probe primer & probe
- GAPDH assay mix nuclease-free water
- reaction results for each sample were calculated as follows to determine the amount of CV-SF-614Gm compared to GAPDH.
- CV-SF-614Gm Ct ( ⁇ R) versus GAPDH mean Ct of CV-SF-614Gm - mean Ct of GAPDH
- CV-SF-614Gm As a result, as a result of checking the amount of CV-SF-614Gm compared to GAPDH in 12 major organs and sera including the administration site, CV-SF-614Gm was detected only in the left thigh muscle (ISL), which is the administration site.
- ISL left thigh muscle
- the index relative value of CV-SF-614Gm compared to GAPDH in ISL after 2 hours of EG-COVID administration was up to 57% and up to 70% after 6 hours.
- CV-SF-614Gm was detected highest at 6 hours, gradually decreased after 6 hours, and was not detected after 72 hours. During the observation period, CV-SF-614Gm was not identified in major organs other than the administration site (see FIGS. 8A and 8B ).
- the virus test was performed at the Masan National Hospital, which has a BL3 facility, for PRNT.
- Poque Infected cells stained with crystal violet (hereinafter ‘Plaque’) were counted and the virus infection inhibition rate was derived compared to the non-neutralized control group, and the formula is as follows.
- the neutralizing antibody titer was derived as an IC50 titer (log10) by calculating the dilution factor at which the reduction rate was 50% using nonlinear regression of GraphPad Prism software based on the virus infection inhibition rate.
- the SARS-CoV-2 prophylactic vaccine according to the present invention exhibits excellent stability and high immunogenicity in vivo without an additional immune adjuvant, thereby exhibiting excellent vaccine effect, and as the vaccine effect is maintained even when prepared in a freeze-dried formulation, the vaccine is stored And it is easy to use, so you can expect an excellent preventive effect against COVID-19.
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Abstract
Description
Claims (16)
- SARS-CoV-2 바이러스의 S 항원을 코딩하는 mRNA를 포함하는 SARS-CoV-2 예방용 백신 조성물.
- 제1항에 있어서, 상기 S 항원을 코딩하는 mRNA는 서열번호 1 또는 서열번호 2의 염기서열을 가지는 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물.
- 제1항 또는 제2항에 있어서, 리포좀 또는 지질 나노입자를 추가로 함유하는 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물.
- 제3항에 있어서, 상기 리포좀 또는 지질 나노입자는 양이온성 지질을 포함하는 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물.
- 제4항에 있어서, 상기 리포좀 또는 지질 나노입자는 추가로 중성 지질을 포함하는 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물.
- 제4항 또는 제5항에 있어서, 상기 리포좀 또는 지질 나노입자는 콜레스테롤을 추가로 포함하는 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물.
- 제4항 내지 제6항 중 어느 한 항에 있어서, 상기 양이온성 지질은 디메틸디옥타데실암모늄 브로마이드(DDA), C12-200, 1,2-디올레오일-3-트리메틸암모늄프로페인(DOTAP),3β-[N-(N′,N′-디메틸아미노에테인 카바모일 콜레스테롤(3β-[N-(N′,N′-dimethylaminoethane) carbamoyl cholesterol, DC-Chol), 1,2-디올레오일옥시-3-디메틸암모늄프로페인(DODAP),1,2-디-O-옥타데세닐-3-트리에틸암모늄 프로페인(1,2-di-O-octadecenyl-3-trimethylammonium propane, DOTMA), 1,2-디미리스토레오일-sn-글리세로-3-에틸포스포콜린(1,2-dimyristoleoyl-sn-glycero-3-ethylphosphocholine,14:1 Etyle PC), 1-팔미토일-2-올레오일-sn-글리세로-3-에틸포스포콜린(1-palmitoyl-2-oleoyl-sn-glycero-3-ethylphosphocholine, 16:0-18:1 Ethyl PC), 1,2-디올레오일-sn-글리세로-3-에틸포스포콜린(1,2-dioleoyl-sn-glycero-3-ethylphosphocholine, 18:1 Ethyl PC), 1,2-디스테아로일-sn-글리세로-3-에틸포스포콜린(1,2-distearoyl-sn-glycero-3-ethylphosphocholin, 18:0 Ethyl PC), 1,2-디팔미토일-sn-글리세로-3-에틸포스포콜린(1,2-dipalmitoyl-sn-glycero-3-ethylphosphocholine, 16:0 Ethyl PC), 1,2-디미리스토일-sn-글리세로-3-에틸포스포콜린(1,2-dimyristoyl-sn-glycero-3-ethylphosphocholine, 14:0 Ethyl PC), 1,2-디라우로일-sn-글리세로-3-에틸포스포콜린(1,2-dilauroyl-sn-glycero-3-ethylphosphocholin, 12:0 Ethyl PC), N1-[2-((1S)-1-[(3-아미노프로필)아미노]-4-[디(3-아미노-프로필)아미노]부틸카복사미도)에틸]-3,4-디[올레일옥시]-벤자마이드(N1-[2-((1S)-1-[(3-aminopropyl)amino]-4-[di(3-amino-propyl)amino]butylcarboxamido)ethyl]-3,4-di[oleyloxy]-benzamide, MVL5), 1,2-디미리스토일-3-디메틸암모늄-프로페인(1,2-dimyristoyl-3-dimethylammonium-propane,14:0 DAP), 1,2-디팔미토일-3-디메틸암모늄-프로페인(1,2-dipalmitoyl-3-dimethylammonium-propane, 16:0DAP), 1,2-디스테아로일-3-디메틸암모늄-프로페인(1,2-distearoyl-3-dimethylammonium-propane, 18:0 DAP), N-(4-카복시벤질)-N,N-디메틸-2,3-비스(올레오일옥시)프로판-1-아미늄(N-(4-carboxybenzyl)-N,N-dimethyl-2,3-bis(oleoyloxy)propan-1-aminium, DOBAQ), 1,2-스테아로일-3-트리메틸암모늄-프로페인(1,2-stearoyl-3-trimethylammonium-propane, 18:0 TAP), 1,2-디팔미토일-3-트리메틸암모늄-프로페인(1,2-dipalmitoyl-3-trimethylammonium-propane, 16:0 TA), 1,2-디미리스토일-3-트리메틸암모늄-프로페인(1,2-dimyristoyl-3-trimethylammonium-propane, 14:0 TAP) 및 N4-콜레스테릴-스퍼민(N4-Cholesteryl-Spermine, GL67)로 이루어진 군으로부터 선택되는 하나 이상인 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물.
- 제5항에 있어서, 상기 중성 지질은 1,2-디미리스토일-sn-글리세로-3-포스파티딜콜린(1,2-Dimyristoyl-sn-glycero-3-phosphorylcholine, DMPC), 1,2-디올레오일-sn-글리세로-3-포스포콜린(1,2-dioleoyl-sn-glycero-3-phosphocholine, DOPC), 1,2-디올레오일-sn-글리세로-3-포스포에탄올아민(1,2-dioleoyl-sn-glycero-3-phosphoethanolamine, DOPE), 1,2-디팔미토일-sn-글리세로-3-포스포콜린(1,2-dipalmitoyl-sn-glycero-3-phosphocholine, DPPC), 1,2-디스테아로일-sn-글리세로-3-포스포콜린(1,2-distearoyl-sn-glycero-3-phosphocholine, DSPC), 1,2-디리노레오일-sn-글리세로-3-포스포콜린(1,2-dilinoleoyl-sn-glycero-3-phosphocholine, DLPC), 포스파티딜세린(PS), 포스포에탄올라민(PE), 포스파티딜글리세롤(PG), 포스포릭액시드(PA) 및 포스파티딜콜린(PC) 및 DOPI(1,2-dioleoyl-sn-glycero-3-phospho-(1'-myo-inositol)), DSPI(1,2-distearoyl-sn-glycero-3-phosphoinositol)으로 이루어진 군으로부터 선택되는 하나 이상인 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물.
- 제5항 내지 제8항 중 어느 한 항에 있어서, 상기 양이온성 지질과 중성지질의 중량비는 1:9 내지 9.5:0.5인 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물.
- 제6항에 있어서, 상기 양이온성 지질과 콜레스테롤의 중량비는 6:1 내지 1:3인 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물.
- 제10항에 있어서, 상기 양이온성 지질, 중성 지질 및 콜레스테롤의 중량비는 1 내지 9.5 : 0.5 내지 9 : 0.05 내지 3인 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물.
- 제3항에 있어서, 상기 리포좀 또는 지질나노입자와 mRNA의 N:P ratio는 0.2:1 내지 1.4:1 인 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물.
- 제1항 내지 제12항 중 어느 한 항에 있어서, 면역증강제를 추가로 포함하는 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물.
- 제13항에 있어서, 상기 면역증강제는 PAMP, 사포닌, CpG DNA, lipoprotein, flagella, poly I:C, 스쿠알렌(Squalene), 트리카프린(tricaprin), 3D-MPL, 및 비독성 리포올리고사카라이드(detoxied lipooligosaccharide, dLOS)구성된 군으로부터 선택된 하나 이상의 면역증강제를 포함하는 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물.
- 제1항 내지 제14항 중 어느 한 항에 있어서, 동결건조된 제형 형태인 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물.
- SARS-CoV-2 바이러스의 S 항원을 코딩하는 mRNA 또는 이를 포함하는 용액이나 버퍼에, 리포좀 또는 지질나노입자를 포함하는 용액이나 버퍼를 추가하는 것을 특징으로 하는 SARS-CoV-2 예방용 백신 조성물의 제조방법.
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CN115737800A (zh) * | 2023-01-09 | 2023-03-07 | 江苏瑞科生物技术股份有限公司 | 一种复合脂质体佐剂及其制备方法 |
US11878055B1 (en) | 2022-06-26 | 2024-01-23 | BioNTech SE | Coronavirus vaccine |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11878055B1 (en) | 2022-06-26 | 2024-01-23 | BioNTech SE | Coronavirus vaccine |
CN115737800A (zh) * | 2023-01-09 | 2023-03-07 | 江苏瑞科生物技术股份有限公司 | 一种复合脂质体佐剂及其制备方法 |
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MX2023010414A (es) | 2023-11-22 |
JP2024509938A (ja) | 2024-03-05 |
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