WO2006009011A1 - コロナウイルススパイクs1融合蛋白及びその発現ベクター - Google Patents
コロナウイルススパイクs1融合蛋白及びその発現ベクター Download PDFInfo
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- WO2006009011A1 WO2006009011A1 PCT/JP2005/012844 JP2005012844W WO2006009011A1 WO 2006009011 A1 WO2006009011 A1 WO 2006009011A1 JP 2005012844 W JP2005012844 W JP 2005012844W WO 2006009011 A1 WO2006009011 A1 WO 2006009011A1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/005—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from viruses
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/12—Antivirals
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K2039/51—Medicinal preparations containing antigens or antibodies comprising whole cells, viruses or DNA/RNA
- A61K2039/525—Virus
- A61K2039/5256—Virus expressing foreign proteins
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2760/00—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA ssRNA viruses negative-sense
- C12N2760/00011—Details
- C12N2760/18011—Paramyxoviridae
- C12N2760/18111—Avulavirus, e.g. Newcastle disease virus
- C12N2760/18122—New viral proteins or individual genes, new structural or functional aspects of known viral proteins or genes
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2770/00—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA ssRNA viruses positive-sense
- C12N2770/00011—Details
- C12N2770/20011—Coronaviridae
- C12N2770/20022—New viral proteins or individual genes, new structural or functional aspects of known viral proteins or genes
Definitions
- the present invention relates to a fusion protein obtained by adding a specific virus-derived peptide to a coronavirus envelope spike protein, and an expression vector for expressing the fusion protein. More specifically, a fusion protein obtained by attaching a peptide in the transmembrane region of the viral membrane protein to the C-terminal side of coronavirus spike protein S1, preferably a peptide in the transmembrane region of the Eukatsuru disease virus (NDV) F protein.
- NDV Eukatsuru disease virus
- a fusion protein obtained by adding a peptide in the N-terminal region of snoike protein S2 to the C-terminal side of coronavirus spike protein S1, an expression vector incorporating a gene encoding the fusion protein, and the expression vector as coronavirus The present invention relates to a method for use as a main component of a vaccine.
- IBV Chicken infectious bronchitis virus
- S1 and S2 a membrane protein belonging to the Coronaviridae family as a genome
- S1 and S2 a membrane protein that is common to coronaviruses.
- S1 and S2 a membrane protein that is common to coronaviruses.
- S1 and S2 a membrane protein that is common to coronaviruses.
- S1 and S2 a membrane protein that is composed of two subunits called S1 and S2
- S1 and S2 This structure is common to coronaviruses.
- S1 and S2 This cleavage is necessary to obtain the infectivity of the virus.
- Each subunit has different properties.
- S1 on the N-terminal side has functions to adsorb to cells, induce neutralizing antibodies, and determine the serotype of the virus.
- S2 on the C-terminal side mainly plays a role of fixing S1 to the virus envelope (Non-Patent Documents 1, 4, 5, and 6).
- IBV IBV
- Infected chicken's nasal discharge, tears, oral mucus, and stool contain a large amount of virus, which is the source of infection.
- Viral antigens are mutated and there are many virus strains with different antigenicities, so the flock is repeatedly infected.
- Symptoms include respiratory symptoms, spawning disorders such as decreased egg production and abnormal egg production, nephritis, and diarrhea. It is The mortality rate with severe symptoms is higher for younger children.
- there are significant economic damages such as developmental disorders due to complications with mycoplasma and coliforms, and the appearance of many non-laying hens due to infection during the young stage.
- serotype and disease type Histologically, epithelial cells such as trachea, kidney and fallopian tube are degenerated and destroyed.
- Non-specialty S thousand literature 1 Johnson ⁇ ⁇ ⁇ ⁇ et al., A recombinant fowl adenovirus expressing the SI gene or infectious bronchitis virus protects against cnailenge with infectious bronchiti s virus ", Vaccine, 2003 Jun 20; 21 (21-22 ): p.2730-6
- Non-Patent Document 2 Kapczynski DR et al., 'Protection of chickens from infectious bronchitis by in ovo and intramuscular vaccination with a DNA vaccine expressing the SI glycoprotein ", Avian Dis., 2003 Apr— Jun; 47 (2): p. 272-85
- Non-Special Reference 4 Stern D.F., et al., Coronavirus protein: Biogenesis of avian infectious bronchitis virus virion proteins ", J. Virol., 1982, 44: p.804-12
- Non-Special Publication 5 Cavanagh D. et al., "Coronavirus IBV: removal of the spike glycoprotei n 3 ⁇ 41 by urea abolishes infectivity ana haemagglutination but not attachment to cell", J. Gen. Virol, 1986, 67: p.1442-8
- Non-Patent Literature 6 Cavanagh D. et al., "Amino acid witnin the hypervariable region I of avian coronavirus IBV (Massachusetts serotype) spike glycoprotein are associated with n eutralization epitopes", Virus Res., 1988, 11: p.141-50
- the present inventors have identified the spike protein S1 on the C-terminal side of the spike protein S1 rather than expressing the coronavirus spike protein S1 alone as in the prior art. It was found that the fusion protein can elicit a highly neutralizing antibody against coronavirus by adding the above peptide to form a fusion protein (hereinafter also referred to as “corona spike S1 fusion protein”). .
- the fusion protein can be obtained by incorporating a gene encoding the fusion protein into an expression vector and expressing the fusion protein from the expression vector.
- a neutralizing antibody against a coronavirus is efficiently induced by administering to a host either Coronaspike S1 fusion protein or an expression vector incorporating a gene encoding a coronaspike S1 fusion protein.
- an expression vector incorporating a gene encoding a strong corona spike S1 fusion protein or a corona spike S1 fusion protein can be used as a vaccine antigen against the target coronavirus.
- the present invention provides the following expression vector into which a gene encoding a Coronas sequel S1 fusion protein is incorporated.
- the peptide is a spike protein of chicken infectious bronchitis virus (IBV) or a F protein of Eustrept virus (hereinafter also referred to as “NDV”)! 2.
- IBV infectious bronchitis virus
- NDV Eustrept virus
- the present invention further provides the following corona spike S1 fusion protein.
- peptide is a spike protein of chicken infectious bronchitis virus (IBV) or a F protein of -European castle disease virus (NDV)! Fusion protein.
- IBV infectious bronchitis virus
- NDV Newcastle disease virus
- fusion protein according to the above 10, wherein the peptide has an amino acid sequence encoded by the 3200 to 3418th position of SEQ ID NO: 1 or the base sequence set forth in SEQ ID NO: 3.
- the present invention also provides a method of using the expression vector as a main component of a coronavirus vaccine. Furthermore, the present invention relates to a recombinant corona spike S1 fusion protein that can also obtain host power transformed with any of the above expression vectors, and a method of using the corona spike S 1 fusion protein as a main component of a coronavirus vaccine. Include The
- a novel fusion in which a peptide in the transmembrane region of the viral membrane protein or a peptide in the N-terminal region of the IBV spike S2 protein is attached to the C-terminal side of the IBV spike protein S1.
- An expression vector incorporating a gene encoding a protein is provided.
- the expression vector elicits high levels of neutralizing antibodies that are not seen with IBV spike protein S1 alone when immunized to a host. Accordingly, a method for enhancing the immunogenicity of IBV spike protein S1 is provided by using the expression vector of the present invention.
- IBV spike S1 fusion protein By transforming animal cells with the expression vector of the present invention, it is possible to produce IBV spike S1 fusion protein in the animal cells.
- various hosts eg bacteria, insect cells, yeast, etc.
- IBV spike S1 fusion protein Is possible.
- the resulting IBV Snoike S1 fusion protein is used as an antigen capable of inducing high neutralizing activity.
- the present invention can be applied not only to IBV but also to spike protein S1 of other coronaviruses, and can be used as a method for enhancing the immunogenicity of spike protein.
- FIG. 1 shows the construction procedure of pCAGnTM23S.
- FIG. 2-1 shows the procedure for constructing pCAGG-LgAs-S1.
- Fig. 2-2 shows the construction procedure of pCAGG-LgAs-S1 (continued).
- Fig. 3-1 shows the construction procedure of pCAGG-LgAs-SlFtm.
- Fig. 3-2 shows the construction procedure of pCAGG-LgAs-SlFtm (continued).
- FIG. 4 shows the construction procedure of pCAGG-LgAs-Sl (l).
- FIG. 5 shows the procedure for constructing pKA4BP.
- FIG. 6 shows the construction procedure of pKA4BP-LgAsSl.
- FIG. 7 shows the construction procedure of pKA4BP-LgAsSlFtm.
- the present invention relates to transfecting of viral membrane protein on the C-terminal side of spike protein S1 of coronavirus. It is characterized by an expression vector in which a gene encoding a novel Coronas sirocci S 1 fusion protein obtained by adding a peptide in the membrane region or a peptide in the N-terminal region of IBV spike protein S2 is included.
- Examples of the coronavirus used in the present invention include human respiratory coronavirus (HeoV), severe acute respiratory syndrome virus (SARSCoV), porcine infectious gastroenteritis virus (TG EV), porcine respiratory system Coronavirus (PRCoV), Inucoronavirus (CcoV), Feline Coronavirus (FECoV), Feline Infectious Peritonitis Virus (FIPV), Swine Epidemic Diarrhea Virus (PED V), Ushikoronavirus (BcoV), Umacorona Examples include viruses (EcoV), avian infectious bronchitis virus (IBV), and turkey coronavirus (TcoV), and IBV is preferred.
- HeoV human respiratory coronavirus
- SARSCoV severe acute respiratory syndrome virus
- TG EV porcine respiratory system Coronavirus
- PRCoV Inucoronavirus
- FeCoV Feline Coronavirus
- FIPV Feline Infectious Peritonitis Virus
- PED V Swine Epidemic Diarrhea
- IBV is prepared by the following method. First, IBV is propagated using embryonated chicken eggs or animal cells capable of growing IBV. When using animal cells, it is preferable to use chicken cells which are natural hosts. Examples of such cells include cells such as -chicken kidney. For the propagation of viruses using these cells, commonly used cell culture methods and virus propagation methods are used. In a preferred embodiment, the IBV-TM strain is inoculated into 10-12 day old embryonated eggs and incubated at 35 ° C.-38 ° C. for 1-5 days, and the cavity fluid is collected. After rough centrifugation, ultracentrifugation with 15-25% sucrose as a cushion is performed (25-35k, 1-2 hours), and the virus-containing sediment is collected.
- the gene encoding the IBV spike protein is extracted from the fowl egg cavity fluid as it is, or extracted / purified from the sediment obtained by concentrating the cavity fluid by ultracentrifugation. It is prepared by amplifying the gene and cloning it into a vector as a single gene.
- the RT-PCR primer used in the present invention is the oligonucleotide described in SEQ ID NO: 5 in the sequence listing on the 5 ′ side and the oligonucleotide described in SEQ ID NO: 6 in the sequence listing on the 3 ′ side.
- the amplified fragment is inserted into an appropriate cloning vector and then introduced into E. coli.
- IB from E. coli colonies A clone having a gene encoding the V-snoike protein SI and S2 is selected.
- the presence or absence of the marker gene, the hybridization using the labeled IBV spike protein S1 gene fragment or synthetic nucleotide as a probe, and the nucleotide sequence of the target gene have been clarified. In this case, it is performed by a gene cutting pattern with an appropriate restriction enzyme.
- RNA extraction For the above RNA extraction, commercially available reagents such as Catrimox (Takara Shuzo), TRIzol reagent (Invitrogen), ISOGEN (-Tubong Gene), StrataPrep Total RNA Purification Kit (Toyobo), RT-PCR, one step RNA PCR kit (Takara Shuzo), such as a commercially available kit, genes claw - the ring, commercially available claw Jung vectors such as P CR2.1 (Invitrogen) is used. The operation in each step may follow the method attached to each kit.
- Catrimox is used for RNA extraction and Z purification
- an on-step RNA PCR kit is used for RT-PCR.
- the PCR reaction is performed by heating 30 cycles of 94 ° C-30 seconds, 52 ° C_30 seconds, 72 ° C_5 minutes after heating at 50 ° C-30 minutes, 94 ° C-2 minutes.
- the pCR2.1 plasmid is used for cloning the target gene.
- the base sequence of the gene encoding IB V snoike protein SI thus obtained can be determined by DNA sequencer (for example, Applied Biosystems 337 type).
- a gene fragment encoding a peptide in the N-terminal region of IBV snow protein S2 can be obtained by the following method.
- the gene fragment encoding the transmembrane region of IBV spike protein S2 was used as an RT-PCR primer as an oligonucleotide (5 ′ side) described in SEQ ID NO: 16 in the Sequence Listing and an oligonucleotide described in SEQ ID NO: 17 (SEQ ID NO: 17). 3 'side) can be obtained by the same method as above.
- a gene fragment encoding the transmembrane region of Newcastle disease virus F protein gene can be obtained by the following method. That is, it is achieved by cloning the NDV-F gene according to the method of Ishida et al., Amplifying the target gene using this as a saddle type, and cloning it as a single gene fragment (Ishida N. et al., “Sequence of 2,611 nucleotides from the 3 end of Newcastle disease virus genome RNA and the predicted amino acid sequence of viral NP protein Nucleic Acids Res., 1986, 14: p. 6551-64) o PCR primers used at this time are 5 'The side is SEQ ID NO: 13 in the sequence listing The 3 ′ side is the oligonucleotide described in SEQ ID NO: 14 in the sequence listing.
- the amino acid sequence of the target protein is converted into gene analysis software such as GENETYX (Genetics Co., Ltd.) or OSUI (http: / /sosui.proteome.bio.tuat.ac.jp/
- the gene fragment encoding the IBV spike protein S1 so that the gene fragment encoding the peptide in the transmembrane region of the viral membrane protein thus obtained is added to the C-terminal side of the IBV spike protein S1.
- Incorporated into expression cassettes such as plasmids and viral vectors in the form linked to the 3 'end of The operation is in accordance with the general remarks described by Sambrook et al., Sambrook J. et al., 'Molecular and loning, A Laboratory Manual Second Edition "Cold Spring Harbor Laboratory Press, NY, 1989) or This is performed using various genetic manipulation kits developed based on this technology.
- a fusion protein in which the peptide in the N-terminal region of S2 is attached to IBV spike protein S1 is coded.
- the gene amplification is performed by RT-PCR using IBV RNA as a saddle and cloned as a single gene fragment, similar to the case of cloning the snook protein S1.
- the oligonucleotide shown in SEQ ID NO: 9 is used on the 5 ′ side, and the oligonucleotide shown in SEQ ID NO: 15 in the sequence listing is used on the 3 ′ side.
- the gene fragment encoding the peptide in the N-terminal region of IBV spike protein S2 obtained at this time has the base sequence described in SEQ ID NO: 4 in the Sequence Listing.
- a secretory signal inherent in S1 of IBV can be expressed more effectively by using secretion signals such as MDVl-gA, chicken IgH heavy chain, and VSV-g G.
- Promoters used for expression include strong promoters such as ⁇ -actin-type promoters, such as late SV40, cytomegaloinores IE promoter, and chicken. and the j8-actin promoter.
- a hybrid promoter such as CAG with-) atri ⁇ -actin promoter and cytomegalovirus enhancer.
- a promoter derived from the virus such as the Marek's disease virus gB promoter (JP-B 8-322559), whose expression can be controlled in vivo.
- Fusion containing an IBV spike protein S1 and a peptide in the transmembrane region of the viral membrane protein or a peptide in the N-terminal region of the spike protein S2 by directly administering the expression cassette obtained by force to the chicken.
- the immunogenicity of a protein hereinafter sometimes referred to as “recombinant IBV spike S1 fusion protein” can be examined.
- Marek's disease virus gB protein gene promoter as a promoter for expressing a foreign gene. That is, when an MDV vector in which the expression cassette obtained by binding the above-mentioned recombinant IBV spike S1 fusion protein gene is inserted downstream of the gB promoter is used, a high antibody titer against MDV is induced at the same time as IBV It is possible to induce neutralizing antibodies against.
- IBV spike S1 fusion protein gene in this expression cassette into another expression vector, various hosts (eg, bacteria, insect cells, yeast, etc.) can produce IBV spike S1 fusion protein. be able to.
- Purification of the recombinant IBV spike S1 fusion protein produced by these hosts is performed by methods commonly used in protein chemistry, such as salting out, ultrafiltration, isoelectric precipitation, electrophoresis, etc.
- the kinetic method, ion exchange chromatography, gel filtration chromatography, affinity chromatography, etc. can be selected as appropriate.
- the IB virus TM strain was inoculated into 11-day-old chicken eggs and incubated at 37 ° C for 3 days, and the cavity fluid was collected. After rough centrifugation, ultracentrifugation using 20% sucrose as a cushion was performed (30 k, 1 hour), and viral RNA was prepared from the sediment using Catrimox (Takara Shuzo). This is a saddle type, one step RT-PCR was performed using an RNA PCR kit (Takara Shuzo) to amplify the snook protein gene.
- the following primer pair is used for amplification, and the reaction is performed at 50 ° C_30 minutes, 94 ° C_2 minutes, followed by 30 cycles of 94 ° C-30 seconds, 52 ° C-30 seconds, 72 ° C-5 minutes. Repeated times. 5 'side: CAAATTATTG GTCAGAGATGTTGG (SEQ ID NO: 5)
- the amplified fragment was TA cloned into pCR2.1 (Invitrogen), cleaved with BamHI and EcoRV existing outside the cloning site, and then a fragment of about 3.5 kbp containing the spike protein S1 and S2 genes was obtained. Cut out and blunt ended. This fragment was inserted into pCAGn-mcs-polyA (W097Z46583) cut with Hindlll and treated with a smooth end to construct pCAGn-TM23S (FIG. 1).
- pCAGn-TM23S was in a saddle type, and the spike sequence without the signal sequence was amplified by PCR (SEQ ID NO: 1).
- the primer pair used has the following sequence with a Kpnl site added on the 5 ′ side and an Xbal site added on the 3 ′ side.
- Takara Shuzo's LA-Taq was used, and the PCR reaction solution was prepared according to the instructions attached to LA-Taq. The reaction temperature and time were 98 ° C for 40 seconds and 56 ° C for 10 minutes. The cycle was repeated 20 times. All subsequent PCRs were performed in the same manner using Takara Shuzo's LA-taq.
- the amplified fragment was cleaved with Kpnl, blunt-ended, and then cleaved with Xbal to obtain a spike protein gene fragment.
- a region (approximately 330 bp) containing the leader / signal sequence of glycoprotein A of MDV1 (hereinafter sometimes referred to as “gA”) was amplified with a primer attached with a Kpnl or Xbal site ( SEQ ID NO: 2). Primer sequences are shown below.
- the reaction temperature and time were 94 ° C_1 min, 57 ° C_1 min, 72 ° C_1 min. Cycle 20 times.
- the fragment was cleaved with Kpnl and Xbal and then inserted into pUC119 cleaved with Kpnl and Xbal (pUCl 19LgAs).
- the plasmid was cleaved at the Eco T14I site immediately after the gA leader / signal sequence, blunt-ended, and then cut with Xbal to remove the ORF part of gA downstream from the signal sequence.
- the fragment was recovered and the above spike protein gene fragment was inserted into the same site to obtain pUC119LgAsTM23S.
- the S1 part (1.6kbp) with the gA leader / signal sequence added was amplified with the following primers with Kpnl or Xbal sites attached, and cleaved with Kpnl and Xbal. It was then blunt-ended and inserted into the pUC-CAGGS Sail site, which was also blunt-ended, in the direction in which S1 appears to construct pCAGG-LgAs-Sl ( Figures 2-1 and 2-2).
- the following primer pair was used for amplification.
- As for the reaction temperature and time a cycle of 94 ° C-1 min and 60 ° C-5 min was repeated 20 times.
- GGGGTACCTACATATCTTCCCTCATGCTCACGC (underlined part is Kpnl site) (SEQ ID NO: 9) bal site, TTA following 5' side of Xbal site is a stop codon) (SEQ ID NO: 11)
- pUCl 19-LgAsTM23S is a cocoon type, and S1 portion (1.6kbp) with gA leader / signal sequence is amplified with the following primers with Kpnl or BssHII site, and pCR2. TA-cloned to 1 (pCR2.1LgAsSl). As the amplification reaction temperature and time, a cycle of 94 ° C-1 minutes and 60 ° C_5 minutes was repeated 20 times.
- nucleotide sequence (SEQ ID NO: 4) encoding the peptide in the N-terminal region of spike proteins S 1 and S 2 in which the signal sequence has been replaced with the one derived from gA, and pUC119-LgAsTM23 is the vertical type Amplified by PCR.
- the Kpnl site was added to the 5th primer and the stop codon and Hindlll site were added to the 3 ′ primer.
- the primer sequences used are shown below.
- As for the reaction temperature and time a cycle of 94 ° C-1 min, 54 ° C-1 min, 72 ° C-3 min was repeated 20 times.
- the fragment was subjected to blunt end treatment after cleavage with Kpnl and Hindlll, and pCAGG-LgAs-Sl (l) was inserted into pUC-CAGGS that had been blunt-ended after Sail cleavage (Fig. 1) (Fig. Four).
- the expression plasmids obtained in Examples 2, 3 and 4 were immunized to 2.5-week-old SPF chickens (maintained by the Institute of Chemotherapy and Serum Therapy) consisting of 5 birds per group and evaluated as DNA vaccines. It was. First, the chicken was anesthetized with Nembutal, the skin of the right leg was incised, and 45 ⁇ 1 of a plasmid solution prepared at a concentration of 1 ⁇ m / ⁇ 1 with TE buffer was injected into the muscle.
- the production of the recombinant virus was performed by introducing an insertion plasmid into the virus-infected cells by the electoral poration method.
- the insertion plasmid PKA4BP-LgAsSl used at this time was prepared by the following procedure.
- a 2.8 kb fragment (A4 fragment) (patent 3428666) obtained by cleaving MDV1 DNA with EcoRI was cloned into the EcoRI site of PUC119 (pKA4).
- the digested plasmid pSVL for animal cells was digested with BsaBI and Xhol and then blunt-ended, and then the 0.3k fragment (transcription termination factor) was crushed from the Sad site. Inserted into.
- This plasmid was digested with Xbal and then blunt-ended, and the blunt-ended MDV promoter g fragment (JP-A 8-322559 (Japanese Patent Application No. 7-160106)) was inserted (pKA4BP) ( Figure 5).
- the S1 portion (1.6 kbp), which was constructed in the process of constructing pCAGG-LgAs-Sl described in Example 2 and was pUC119LgAsTM23 S and added with a gA leader / signal sequence, was replaced with Kpnl or Amplify with the following primer with the Xbal site attached, cut with Kpnl and Xbal, then blunt-ended, and insert into the Sad site of PKA4BP with the same blunt end in the direction of S1 expression, and pKA4BP-LgAsSl (Fig. 6). The following primer pair was used for amplification. As for the reaction temperature and time, a cycle of 94 ° C-1 min and 60 ° C-5 min was repeated 20 times.
- the constructed insertion plasmid pKA4BP-LgAsSl was digested with the restriction enzyme EcoRI and linearized. After mixing it with the parent strain-infected cell in a gene pulser cuvette, the pulse was applied using a gene pulser (BioRad), and the insertion plasmid was introduced into the infected cell. Details of the production of the recombinant virus are described in JP-A-8-322559 (Japanese Patent Application No.7-160106). After introducing the insertion plasmid into MDV1-infected cells, the infected cells are cultured in 96 wells, and then cultured the next day with CEF added at a concentration of 60,000 to 80,000 cells / well.
- PCR screen MDV1-S1 was constructed by repeating the above-described cloning and the above-described cloning operations until the recombinant virus was purified.
- the recombinant virus obtained in Examples 6 and 7 was immunized with 10,000 PFU subcutaneously in the neck of a 1-day-old SPF chicken (maintained at the Institute of Clinical and Serological Therapy) consisting of 5 birds per group. Thereafter, blood was collected over time and evaluated by examining the neutralizing antibody titer against the IBV TM strain.
- An expression vector incorporating a gene encoding a novel recombinant IBV spike S1 fusion protein obtained by the method of the present invention was immunized with an expression vector incorporating a gene encoding spike protein S1.
- Recombinant IBV spike S1 fusion protein which is also prepared with animal cell force transformed with the expression vector of the present invention, is a material for constructing antigen-antibody detection systems such as ELISA and WB, which are frequently used in investigating epidemiology and vaccine effects. Can be used as
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104232624A (zh) * | 2013-06-09 | 2014-12-24 | 中国农业大学 | 辅助鉴定h9亚型禽流感病毒和鸡传染性支气管炎病毒的引物组合物及其应用 |
WO2021200800A1 (ja) * | 2020-03-30 | 2021-10-07 | 国立大学法人大阪大学 | コロナウイルス感染またはコロナウイルス感染に伴う症状の予防または治療ワクチン |
WO2021219121A1 (zh) * | 2020-04-30 | 2021-11-04 | 养生堂有限公司 | 用于筛选冠状病毒感染阻断剂的检测试剂及检测方法 |
WO2022045827A1 (ko) * | 2020-08-27 | 2022-03-03 | 주식회사 셀리드 | 신규한 코로나바이러스 재조합 스파이크 단백질, 이를 코딩하는 폴리뉴클레오티드, 상기 폴리뉴클레오티드를 포함하는 벡터 및 상기 벡터를 포함하는 코로나바이러스감염증 예방 또는 치료용 백신 |
WO2022230971A1 (ja) * | 2021-04-30 | 2022-11-03 | 国立研究開発法人理化学研究所 | コロナウイルスに対する免疫応答を誘発する人工アジュバントベクター細胞、および当該細胞を含む医薬組成物、並びにそれらの使用 |
KR20230061325A (ko) * | 2020-08-27 | 2023-05-08 | 주식회사 셀리드 | 신규한 코로나바이러스 재조합 스파이크 단백질, 이를 코딩하는 폴리뉴클레오티드, 상기 폴리뉴클레오티드를 포함하는 벡터 및 상기 벡터를 포함하는 코로나바이러스감염증 예방 또는 치료용 백신 |
JP2023109965A (ja) * | 2016-10-26 | 2023-08-08 | キュアバック エスイー | 脂質ナノ粒子mRNAワクチン |
RU2816645C1 (ru) * | 2020-08-27 | 2024-04-02 | Селлид Ко., Лтд. | Новый рекомбинантный шиповидный белок коронавируса, кодирующий его полинуклетид, вектор, содержащий полинуклетид, и вакцина для профилактики или лечения коронавирусной инфекции, содержащая вектор |
CN118546258A (zh) * | 2024-06-03 | 2024-08-27 | 中国动物卫生与流行病学中心 | 一种鸡传染性支气管炎病毒抗原表位融合肽及其在间接elisa检测中的应用 |
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CN104232624A (zh) * | 2013-06-09 | 2014-12-24 | 中国农业大学 | 辅助鉴定h9亚型禽流感病毒和鸡传染性支气管炎病毒的引物组合物及其应用 |
JP2023109965A (ja) * | 2016-10-26 | 2023-08-08 | キュアバック エスイー | 脂質ナノ粒子mRNAワクチン |
WO2021200800A1 (ja) * | 2020-03-30 | 2021-10-07 | 国立大学法人大阪大学 | コロナウイルス感染またはコロナウイルス感染に伴う症状の予防または治療ワクチン |
WO2021219121A1 (zh) * | 2020-04-30 | 2021-11-04 | 养生堂有限公司 | 用于筛选冠状病毒感染阻断剂的检测试剂及检测方法 |
WO2022045827A1 (ko) * | 2020-08-27 | 2022-03-03 | 주식회사 셀리드 | 신규한 코로나바이러스 재조합 스파이크 단백질, 이를 코딩하는 폴리뉴클레오티드, 상기 폴리뉴클레오티드를 포함하는 벡터 및 상기 벡터를 포함하는 코로나바이러스감염증 예방 또는 치료용 백신 |
KR20230061325A (ko) * | 2020-08-27 | 2023-05-08 | 주식회사 셀리드 | 신규한 코로나바이러스 재조합 스파이크 단백질, 이를 코딩하는 폴리뉴클레오티드, 상기 폴리뉴클레오티드를 포함하는 벡터 및 상기 벡터를 포함하는 코로나바이러스감염증 예방 또는 치료용 백신 |
RU2816645C1 (ru) * | 2020-08-27 | 2024-04-02 | Селлид Ко., Лтд. | Новый рекомбинантный шиповидный белок коронавируса, кодирующий его полинуклетид, вектор, содержащий полинуклетид, и вакцина для профилактики или лечения коронавирусной инфекции, содержащая вектор |
KR102763296B1 (ko) | 2020-08-27 | 2025-02-05 | 주식회사 셀리드 | 신규한 코로나바이러스 재조합 스파이크 단백질, 이를 코딩하는 폴리뉴클레오티드, 상기 폴리뉴클레오티드를 포함하는 벡터 및 상기 벡터를 포함하는 코로나바이러스감염증 예방 또는 치료용 백신 |
WO2022230971A1 (ja) * | 2021-04-30 | 2022-11-03 | 国立研究開発法人理化学研究所 | コロナウイルスに対する免疫応答を誘発する人工アジュバントベクター細胞、および当該細胞を含む医薬組成物、並びにそれらの使用 |
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