WO2022045827A1 - 신규한 코로나바이러스 재조합 스파이크 단백질, 이를 코딩하는 폴리뉴클레오티드, 상기 폴리뉴클레오티드를 포함하는 벡터 및 상기 벡터를 포함하는 코로나바이러스감염증 예방 또는 치료용 백신 - Google Patents
신규한 코로나바이러스 재조합 스파이크 단백질, 이를 코딩하는 폴리뉴클레오티드, 상기 폴리뉴클레오티드를 포함하는 벡터 및 상기 벡터를 포함하는 코로나바이러스감염증 예방 또는 치료용 백신 Download PDFInfo
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Definitions
- the present invention relates to a novel coronavirus recombinant spike protein, a polynucleotide encoding the same, a vector comprising the polynucleotide, and a vaccine for preventing or treating a coronavirus infection comprising the vector.
- Coronavirus infections that cause severe respiratory disease and cause death are classified as RNA viruses belonging to Coronaviridae, and are defined as respiratory syndrome caused by coronavirus infection.
- viruses belonging to Coronaviridae there are a total of 7 types of viruses known to infect humans, 4 types causing colds (229E, OC43, NL63, HKU1), 2 types causing severe pneumonia (SARS-CoV, MERS-CoV) and this time There is SARS-CoV-2, the virus that caused the pandemic.
- the three viruses (SARS-CoV, MERS-CoV, and SARS-CoV-2) that cause severe pneumonia have A global pandemic is progressing up to the present SARS-CoV-2.
- Coronavirus (Coronaviridae) has unstable RNA as its genome, so mutations occur easily, and due to this characteristic, there is a possibility of transmission in both animals and humans.
- SARS-CoV has been transmitted from civet cats to humans and MERS-CoV has been transmitted from dromedaries to humans. It has the potential to evolve into a virus.
- SARS-CoV-2 was first reported in late 2019. Compared to SARS-CoV that occurred in China in 2002, SARS-CoV had a higher severity, but SARS-CoV-2 had a much higher transmission power. are doing This resulted in a global pandemic. Common signs of infection include respiratory symptoms, fever, cough, shortness of breath and shortness of breath. In more severe cases, the infection can cause pneumonia, severe acute respiratory syndrome, kidney failure, and even death.
- the types of preventive vaccines are classified according to the production method, such as inactivated vaccines, attenuated vaccines, protein subunit vaccines, viral vector based vaccines, DNA vaccines, and mRNA vaccines. are classified Inactivated vaccines and attenuated live vaccines, which have traditionally been widely used as vaccine formulations, have the advantage of a simple manufacturing process. There is a risk of re-acquiring pathogenicity through Since the protein subunit vaccine does not induce an immune response well, there is a problem that an immune adjuvant must be used together.
- a vector-based vaccine activates an immune response by delivering the vaccine antigen gene to human cells with high efficiency and allowing the body to generate antigenic proteins on its own.
- Viral vector-based vaccines are safe, and because they induce a high level of immune response, efficient immunization is possible with only a single administration without the need for repeated administration.
- structurally it has the advantage of efficiently inducing cytotoxic T-cell immunity as well as antibody production based on the virus.
- adenovirus is widely used in the field of gene therapy because it is easy to manipulate and safety has been verified through many studies, and a relatively large antigen (9 ⁇ 35kb) Because it can deliver, it has high competitiveness compared to other viral vectors.
- Adenovirus is a linear, double-stranded DNA virus, 70-90 nm in diameter, unenveloped, with an icosahedral capsid, formed by 240 hexons, 12 pentons and fibers extending from the vertices of each icosahedron. These hexons, pentons and fibers determine mainstream adenovirus antigens and their serotypes.
- the adenovirus genome is about 30-45 kb in size and has four early regions (E1, E2, E3 and E4) and five late regions (L1-L5).
- Adenoviruses are good candidates as recombinant vectors for vaccine production because they are highly infective and many of them are not pathogenic.
- adenoviral vectors can efficiently translate large genes and prolong the immune response in animals.
- Adenovirus vectors are mainly used in a form in which the E1 gene responsible for self-replication has been removed.
- Adenovirus vectors with the E1 gene removed are safe as they do not induce pathogenicity in the body because self-replication is impossible in human cells.
- the Ad5/35 vector is a form in which the knob gene of replication-deficient adenovirus serotype 5 (Ad5) is substituted with the knob gene of adenovirus serotype 35 (Ad35).
- Ad5/35 vector can be introduced into cells through the CD46 receptor, which is highly expressed in human immune cells, rather than the conventional Ad5 cell receptor. That is, Ad5/35 can be efficiently introduced into human antigen-presenting cells and become an efficient vaccine platform that can maximize antigen production.
- Ad5/35 vector has a significantly lower risk of causing liver toxicity when compared to Ad5 vector.
- the present inventors have confirmed in preclinical and clinical trials that a high level of immune response is induced when a cancer antigen gene is delivered to a cancer patient using an adenoviral vector. It was confirmed that no related problems occurred.
- a consideration when making vaccine candidates is the stability of the antigen to be expressed. Although it is important that a large amount of vaccine antigen is secreted, even if it is expressed, if it is rapidly degraded at an early stage, there is a fear that it may not be able to effectively activate immune cells. Therefore, it is important to keep the antigen stable for a long time.
- the present inventors have developed a vaccine for preventing or treating coronavirus infection-19 (COVID-19), the S1 gene encoding a spike protein that plays a key role in the cellular infection of SARS-CoV-2
- a prophylactic or therapeutic vaccine was prepared by introducing a polynucleotide in which a linker sequence was substituted for a cleavage recognition sequence located between and S2, and the vaccine produced an antibody against SARS-CoV-2 and T cell reactivity. By confirming this high, the present invention was completed.
- the present invention provides a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the coronavirus spike protein is removed and a linker sequence is introduced.
- the present invention provides a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of SARS-CoV-2 spike protein is removed and a linker sequence is introduced.
- the present invention provides a polynucleotide encoding a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the coronavirus spike protein is removed and a linker sequence is introduced.
- the present invention provides a polynucleotide encoding a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the SARS-CoV-2 spike protein is removed and a linker sequence is introduced.
- the present invention provides a vector comprising a polynucleotide encoding a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the coronavirus spike protein has been removed and a linker sequence has been introduced.
- the present invention provides a vector comprising a polynucleotide encoding a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the SARS-CoV-2 spike protein has been removed and a linker sequence has been introduced.
- the present invention provides a vector characterized in that the cleavage recognition sequence between the S1 and S2 genes of the coronavirus spike protein is removed and a polynucleotide encoding a recombinant spike protein into which a linker sequence is introduced is introduced into an adenovirus.
- the present invention provides a vector characterized in that a polynucleotide encoding a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the coronavirus spike protein is removed and a linker sequence is introduced into the Ad5/35 virus is introduced do.
- the present invention is characterized in that a polynucleotide encoding a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the SARS-CoV-2 spike protein is removed and a linker sequence is introduced into the Ad5/35 virus is introduced. provide a vector.
- the present invention provides a vaccine for preventing or treating coronavirus infection, comprising a vector comprising polynucleotides of the S1 and S2 genes of the coronavirus spike protein.
- the present invention provides a vaccine for preventing or treating coronavirus infection, comprising a vector comprising polynucleotides of the S1 and S2 genes of the SARS-CoV-2 spike protein.
- the present invention provides a vaccine for preventing or treating coronavirus infection, characterized in that polynucleotides of S1 and S2 genes of SARS-CoV-2 spike protein are introduced into adenovirus.
- the present invention provides a vaccine for preventing or treating coronavirus infection, characterized in that polynucleotides of S1 and S2 genes of SARS-CoV-2 spike protein are introduced into Ad5/35 virus.
- the present invention is a vector characterized in that the cleavage recognition sequence between the S1 and S2 genes of SARS-CoV-2 spike protein is removed and a polynucleotide into which a linker sequence is introduced is introduced into Ad5/35 virus. It provides a vaccine for preventing or treating coronavirus infection-19 (COVID-19), including.
- the present invention relates to a novel coronavirus recombinant spike protein, a polynucleotide encoding the same, a vector comprising the polynucleotide, and a vaccine for preventing or treating coronavirus infection comprising the vector.
- the recombinant coronavirus spike protein of the present invention is stable and not easily degraded in cells, and by effectively activating immune cells, the antibody production amount and T cell reactivity are high. And since it was confirmed that the T cell reactivity is high, the antibody production and expression period is long, and it does not show liver toxicity, it can be usefully used as a vaccine for preventing or treating coronavirus infection.
- SARS-CoV -2 is a schematic diagram showing a vaccine for preventing or treating coronavirus infection-19 according to the present invention loaded with a spike protein, which plays a key role in cell infection, as an antigen.
- FIG. 2 is a recombinant spike protein in which the cleavage recognition sequence of the gene encoding the spike protein as an antigen in the coronavirus infection-19 prevention or treatment vaccine of the present invention is substituted with a linker sequence has high structural stability and antigen expression, and antibody generation B It is a schematic diagram showing the excellent ability to produce neutralizing antibodies in cells.
- FIG. 3 is a schematic diagram showing the mechanism of action of the vaccine for preventing or treating coronavirus infection-19 of the present invention.
- FIG. 4 is a schematic diagram showing a control expression vector constructed using the genome of adenovirus serotype 5 (Adenovirus type 5, Ad5).
- 5 is a schematic diagram showing adenovirus #1 to #4 vectors loaded with the spike protein antigen, which is an antigen expression gene.
- FIG. 6 is a diagram showing the antigen expression level when the adenovirus #1 to #4 vectors loaded with the spike protein antigen, which is an antigen expression gene, are introduced into a cultured cell line.
- FIG. 7 is a diagram showing the expression level of antigens excreted out of cells when adenovirus #1 to #4 vectors loaded with spike protein antigens, which are antigen expression genes, are introduced into cultured cell lines.
- FIG. 8 is a diagram showing the amount of antibody produced after injection of adenovirus #1 to #4 vectors loaded with spike antigen, which is an antigen expression gene, into mice.
- FIG. 9 is a diagram showing the amount of antigen-specific antibody present in the blood after the adenovirus # 3 vector loaded with the antigen-expressing gene, spike antigen, is injected into the mouse.
- 10 is a diagram showing the amount of antibody produced after injection of the adenovirus # 3 vector loaded with the antigen-expressing gene, spike antigen, into monkeys.
- FIG. 11 is a diagram showing the neutralizing antibody concentration after injection of the adenovirus #3 vector loaded with the antigen-expressing gene, spike antigen, into monkeys.
- FIG. 12 is a diagram showing the level of liver toxicity in the blood after injection of adenovirus #1 to #4 vectors loaded with spike antigen, which is an antigen expression gene, into monkeys.
- FIG. 13 is a diagram showing T cell reactivity in spleen cells and peripheral blood mononuclear cells (PBMC) after injection of adenovirus # 1 to # 3 vectors loaded with spike antigen, an antigen expression gene, into mice.
- PBMC peripheral blood mononuclear cells
- PBMCs peripheral blood mononuclear cells
- 16 shows a similar level of neutralizing antibodies when monkeys are injected with a vector in which the E4 gene is relocated to the E1 region of the viral genome in the #3 vector expressing the spike antigen prepared in Example 3 or the adenovirus gene of the #3 vector. It is a diagram confirming the production of
- the present invention provides a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the coronavirus spike protein is removed and a linker sequence is introduced.
- the coronavirus is characterized in that SARS-CoV, MERS-CoV or SARS-CoV-2 belonging to the genus beta coronavirus.
- SARS-CoV-2 and SARS-CoV The genomic homology between SARS-CoV-2 and SARS-CoV is 79.6%, and the genomic homology between SARS-CoV-2 and MERS-CoV is as high as 50%.
- SARS-CoV-2 and MERS-CoV have similar homology to the spike protein of the present invention at 35%, whereas the spike protein homology between SARS-CoV-2 and SARS-CoV is very high at 76%. do it with
- the present invention provides a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of SARS-CoV-2 spike protein is removed and a linker sequence is introduced.
- the recombinant spike protein in which a linker sequence is linked between S1 and S2 of the present invention not only has high antigen expression but also has improved stability, and thus has excellent ability to generate neutralizing antibodies and induce T cell reactivity.
- immune response may include, but is not limited to, humoral immune responses and cellular immune responses, such as CD4+ or CD8+ cell activation.
- the spike protein antigen linked by the linker sequence is characterized in that the antigen expression level is increased.
- the spike protein is a protrusion-shaped protein that covers the surface of the coronavirus particle and is used when the coronavirus invades human cells. It is composed of subunits of S1 and S2 and is an angiotensin converting enzyme After binding to the -2 (Angiotensin Converting Enzyme 2, ACE-2) receptor, it infects the human body by infiltrating the cell and replicating itself by pushing the genetic material (RNA).
- S protein is a protrusion-shaped protein that covers the surface of the coronavirus particle and is used when the coronavirus invades human cells. It is composed of subunits of S1 and S2 and is an angiotensin converting enzyme After binding to the -2 (Angiotensin Converting Enzyme 2, ACE-2) receptor, it infects the human body by infiltrating the cell and replicating itself by pushing the genetic material (RNA).
- RNA genetic material
- the recombinant protein is characterized in that the cleavage recognition sequence (cleavage site) between the S1 and S2 genes, which are subunits of the spike protein, is removed.
- the protein is characterized in that the cleavage recognition sequence between the S1 and S2 genes is removed and connected with a linker sequence.
- the linker is characterized in that it consists of (GGGGS)n, wherein n is an integer of 1 to 5.
- each protein has a distance (length of the linker sequence) optimized for interaction according to their unique characteristics, and the structural stability of the protein is expressed according to the length of the linker sequence. Accordingly, the protein preferably has n of 1 to 3, and most preferably n is 1.
- n is greater than 4, a large number of repetitive sequences may occur, resulting in not only deletion of linker sequences due to unintentional homologous recombination, but also reduced protein stability.
- the spike protein antigen linked to the linker sequence is characterized in that stability (stability) is increased.
- the linker sequence is characterized in that it consists of SEQ ID NO: 19 or SEQ ID NO: 20.
- coronaviruses have a spike protein in common, and since the spike protein is composed of subunits of S1 and S2, all spike proteins of coronavirus can be used.
- Coronaviruses include 229E, OC43, NL63, HKU1, which cause colds, and SARS-CoV, MERS-CoV, and SARS-CoV-2, which cause severe pneumonia, and their spike proteins are all available.
- it is a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the SARS-CoV-2 spike protein has been removed and a linker sequence is introduced.
- the recombinant spike protein may further include an adjuvant to enhance immunogenicity, wherein the adjuvant is GM-CSF, IL-17, IFNNg, IL-15, IL-5, JNK, NFkB, NKKKKLIGAND , PD1/2, NKKKKG2B, NKG2C, NKKKKG2E, NKKKK2F, TAPAP2, and functional fragments thereof, E-selectin, IL- ⁇ , IL-6, INF- ⁇ , Lympmpmphotoxin ⁇ , hGH-1, MIPPP1, IL-7, IL Functional fragments of -8, APP, IRARAK, IkB, KILILUX, TRAIL-1, IL-1, AIR, and ICAM-1, ICAM-1, TAP2, CD40, TAP1, TRAILrecDRC5, CD34, CD40L, DR3, GlyCAM1, p55 , CD2, Ox40, TRAF6, DR4, ICAM3, DR5, MyD88
- the adjuvant may be linked to the C-terminus of the recombinant spike protein.
- the present invention provides a polynucleotide encoding a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the coronavirus spike protein is removed and a linker sequence is introduced.
- the coronavirus is characterized in that SARS-CoV, MERS-CoV or SARS-CoV-2.
- the present invention provides a polynucleotide encoding a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the SARS-CoV-2 spike protein is removed and a linker sequence is introduced.
- the linker is characterized in that it consists of 9 to 45 bases, preferably consists of 9 to 21 bases, and more preferably consists of 15 bases.
- the polynucleotide encoding the spike protein linked with the linker sequence is characterized in that stability (stability) is increased.
- the polynucleotide encoding the spike protein linked by the linker sequence is characterized in that the antigen expression level is increased.
- the linker sequence is characterized in that it consists of SEQ ID NO: 11 or SEQ ID NO: 15.
- the polynucleotide may be SEQ ID NO: 12 or 16.
- the present invention provides a vector comprising a polynucleotide encoding a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the coronavirus spike protein has been removed and a linker sequence has been introduced.
- the coronavirus is characterized in that SARS-CoV, MERS-CoV or SARS-CoV-2.
- the present invention provides a vector comprising a polynucleotide encoding a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the SARS-CoV-2 spike protein has been removed and a linker sequence has been introduced.
- the present invention provides a vector characterized in that a polynucleotide encoding a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the coronavirus spike protein is removed and a linker sequence is introduced into the adenovirus is introduced.
- the present invention is a vector characterized in that the cleavage recognition sequence between the S1 and S2 genes of the SARS-CoV-2 spike protein is removed and a polynucleotide encoding a recombinant spike protein into which a linker sequence is introduced is introduced into an adenovirus. to provide.
- the vector in which the cleavage recognition sequence between the S1 and S2 genes of the SARS-CoV-2 spike protein is removed and the polynucleotide encoding the recombinant spike protein into which the linker sequence is introduced is introduced into the adenovirus may be SEQ ID NO: 27 or 29. .
- the present invention provides a vector characterized in that a polynucleotide encoding a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the coronavirus spike protein is removed and a linker sequence is introduced into the Ad5/35 virus is introduced do.
- the present invention is characterized in that a polynucleotide encoding a recombinant spike protein in which the cleavage recognition sequence between the S1 and S2 genes of the SARS-CoV-2 spike protein is removed and a linker sequence is introduced into the Ad5/35 virus is introduced. provide a vector.
- the term "vector” refers to a carrier that carries a cloned gene (or another piece of cloned DNA) into a target cell.
- the vector may be any one selected from the group consisting of a plasmid and a virus.
- plasmid DNA examples include commercial plasmids such as pCMV3, pET28a and pET.
- Other examples of plasmids that can be used in the present invention include E. coli-derived plasmids (pCMV3, pET28a, pET, pGEX, pQE, pDEST and pCOLD), Bacillus subtilis -derived plasmids (pUB110 and pTP5) and yeast-derived plasmids.
- plasmids YEp13, YEp24 and YCp50. Since these plasmids show different protein expression levels and modifications depending on the host cell, a host cell most suitable for the purpose may be selected and used.
- virus any known virus that can be used as a vector may be used, and adenovirus, retrovirus, lentivirus, adeno-associated virus (AAV), modified vaccinia virus ankara (MVA), Herpes simplex virus, It may be any one of Baculovirus, but is not limited thereto. According to a specific embodiment of the present invention, the virus is preferably an adenovirus.
- adenoviral vector refers to an adenovirus that has been engineered such that the adenoviral genome has a nucleic acid sequence that is non-native with respect to the adenoviral genome.
- a "recombinant adenoviral vector” typically refers to an adenoviral genome and a required protein (eg, a spike protein of SARS-CoV-2 or a recombinant spike in which the cleavage recognition sequence between S1 and S2 is substituted with a linker sequence). an expression cassette comprising at least one foreign nucleic acid sequence encoding a protein).
- the adenoviral vector preferably comprises at least a portion, preferably at least about 90% of each terminal repeat required to support replication of viral DNA, a fully inverted terminal repeat (ITR) sequence, and Contains the DNA required to encapsidate the genome into the viral capsid.
- ITR fully inverted terminal repeat
- Adenoviruses from a variety of origins can be used as a source of viral genomes for adenoviral vectors.
- Human adenoviruses e.g., subgroup A (e.g., serotypes 12, 18 and 31), subgroup B (e.g., serotypes 3, 7, 11, 14, etc.), subgroup C (e.g., serotypes) 1, 2, 5, and 6), subgroup D (eg serotype 8, 9, 10, 13, 15, 17, 19, 20, etc.), subgroup E (eg serotype 4), subgroup F (eg serotypes 40 and 41) and others are preferred.
- the adenoviral vector is a vector of human subgroup C, in particular serotype 2, even more preferably serotype 5.
- the adenoviral vector may be a replication competent vector.
- adenoviral vectors are replication-defective vectors in host cells.
- replication-defective means that an adenoviral vector has a deficiency in one or more gene functions or regions of the adenoviral genome for replication (e.g., E1, E3 or E4 regions) such that the vector exhibits any low level of to maintain replication or not to replicate in normal host cells, particularly those in humans infected with adenoviral vectors.
- Replication-defective adenoviral vectors ensure the safety of the vaccine.
- the adenoviral vector is a vector in which E1 or E3 or both are removed.
- a deficiency in a gene completely eliminates or impairs the function of the gene, such that, for example, the function of the gene product is reduced by at least about 2-fold, 5-fold, 10-fold, 20-fold or more as compared to the native gene. It is defined as a mutation or deletion to cause
- the resulting replication-defective adenoviral vector can accommodate one or more exogenous nucleic acid sequences at appropriate sites within the adenoviral genome for expression of one or more desired proteins, while retaining the ability to be packaged into an adenoviral capsid.
- replication-defective adenoviral vectors are typically used in complementary cell lines, such as HEK293 or HEK293R cells, that provide gene function not present in replication-defective adenoviral vectors. is produced
- the adenovirus is adenovirus serotype 2 (Adenovirus serotype 2, Ad2), adenovirus serotype 4 (Adenovirus serotype 4, Ad4), adenovirus serotype 5 (Adenovirus serotype 5, Ad5), adenovirus serotype 11 (Adenovirus) serotype 11, Ad11), adenovirus serotype 26 (Adenovirus serotype 26, Ad26), adenovirus serotype 35 (Adenovirus serotype 35, Ad35), chimpanzee adenovirus serotype 68 (ChAd68), avian adenovirus It may be serotype 9 (Fowl adenovirus serotype 9, FAd9) or pig adenovirus serotype 3 (Porcine Adenovirus serotype 3, PAd3).
- the adenovirus may be in a modified form based on Ad5.
- the adenovirus may be an adenovirus (Ad5/35) in which the knob gene of adenovirus serotype 5 (Adenovirus serotype 5, Ad5) is substituted with the knob gene of adenovirus serotype 35 (Adenovirus seroitype 35, Ad35).
- the adenovirus is characterized in that the E1 gene and the E3 gene are deleted.
- the adenovirus may have a form in which part or all of the E4 gene is deleted in addition to the E1 gene and the E3 gene deletion and the E4 gene is rearranged into the E1 region.
- the adenovirus is characterized in that it is introduced into the cell through the CD46 receptor highly expressed in human immune cells.
- the adenovirus is characterized in that the liver toxicity-inducing effect is low.
- the adenovirus is characterized in that the antigen expression level is high.
- the present invention provides a vaccine for preventing or treating coronavirus infection, comprising a vector comprising polynucleotides of the S1 and S2 genes of the coronavirus spike protein.
- the coronavirus may be any one selected from the group consisting of SARS-CoV, MERS-CoV and SARS-CoV-2.
- any known virus that can be used as a vector may be used, and any one of adenovirus, retrovirus, lentivirus, adeno-associated virus (AAV), and modified vaccinia virus ankara (MVA)
- the present invention is not limited thereto.
- the virus is preferably an adenovirus.
- the adenovirus is adenovirus serotype 2 (Adenovirus serotype 2, Ad2), adenovirus serotype 4 (Adenovirus serotype 4, Ad4), adenovirus serotype 5 (Adenovirus serotype 5, Ad5), adenovirus serotype 11 (Adenovirus) serotype 11, Ad11), adenovirus serotype 26 (Adenovirus serotype 26, Ad26), adenovirus serotype 35 (Adenovirus serotype 35, Ad35), chimpanzee adenovirus serotype 68 (ChAd68), avian adenovirus It may be serotype 9 (Fowl adenovirus serotype 9, FAd9) or porcine adenovirus serotype 3 (PAd3).
- the adenovirus may be in a modified form based on Ad5.
- the adenovirus may be an adenovirus (Ad5/35) in which the knob gene of adenovirus serotype 5 (Adenovirus serotype 5, Ad5) is substituted with the knob gene of adenovirus serotype 35 (Adenovirus seroitype 35, Ad35).
- the adenovirus is characterized in that the E1 gene and the E3 gene are deleted.
- the adenovirus may have a form in which part or all of the E4 gene is deleted in addition to the E1 gene and the E3 gene deletion and the E4 gene is rearranged into the E1 region.
- the adenovirus is characterized in that it is introduced into the cell through the CD46 receptor highly expressed in human immune cells.
- the present invention provides a vaccine for preventing or treating coronavirus infection, comprising a vector comprising polynucleotides of the S1 and S2 genes of the SARS-CoV-2 spike protein.
- the present invention provides a vaccine for preventing or treating coronavirus infection, characterized in that polynucleotides of S1 and S2 genes of SARS-CoV-2 spike protein are introduced into adenovirus.
- the present invention provides a vaccine for preventing or treating coronavirus infection, characterized in that polynucleotides of S1 and S2 genes of SARS-CoV-2 spike protein are introduced into Ad5/35 virus.
- the vaccine of the present invention may be prepared in an oral or parenteral formulation, and may be administered by an intradermal, intramuscular, or nasal route, preferably by an intramuscular route.
- the vaccine of the present invention is characterized in that the cleavage site between the S1 and S2 proteins is removed.
- the vaccine is characterized in that the cleavage recognition sequence between S1 and S2 of the spike protein is removed and connected with a linker sequence.
- the linker is characterized in that it consists of 9 to 45 bases, preferably consists of 9 to 21 bases, and more preferably consists of 15 bases.
- the present invention provides a method for preventing or treating coronavirus infection, including coronavirus infection-19, severe acute respiratory syndrome (SARS or Middle East Respiratory Syndrome (MERS)) by administering the vaccine to an individual.
- coronavirus infection-19 coronavirus infection-19, severe acute respiratory syndrome (SARS or Middle East Respiratory Syndrome (MERS)
- SARS severe acute respiratory syndrome
- MERS Middle East Respiratory Syndrome
- “individual” means all animals, including humans, that can be infected with coronavirus.
- the vaccine of the present invention can prevent humans from coronavirus.
- prevention means any action that suppresses or delays the onset of coronavirus infection by administration of a vaccine.
- treatment means any action that removes the coronavirus or alleviates symptoms caused by the coronavirus by administering a vaccine.
- the vaccine of the present invention is administered in a pharmaceutically effective amount.
- pharmaceutically effective amount means an amount sufficient to treat a disease with a reasonable benefit/risk ratio applicable to medical treatment, and the effective dose level includes the type and severity of the subject, age, sex, type of virus infected, drug activity, sensitivity to drug, administration time, administration route, excretion rate, treatment duration, factors including concurrent drugs, and other factors well known in the medical field.
- the vaccine of the present invention may be administered as an individual therapeutic agent or in combination with other therapeutic agents, and may be administered sequentially or simultaneously with conventional therapeutic agents. and may be administered single or multiple. Taking all of the above factors into consideration, it is important to administer an amount that can obtain the maximum effect with a minimum amount without side effects, and can be easily determined by those skilled in the art.
- a recombinant adenoviral vector of the invention comprises 1 ⁇ 10 9 to 1 ⁇ 10 12 viral particles (VP), eg, 1 ⁇ 10 9 , 1 ⁇ 10 10 , 1 ⁇ 10 11 , or 1 ⁇ 10 12 VP.
- VP viral particles
- the present inventors replaced a polynucleotide in which a linker sequence was substituted for a cleavage recognition sequence between S1 and S2 of a polynucleotide encoding a spike protein of SARS-CoV-2 belonging to coronavirus, E1 of adenovirus and E3 genes are deleted, and the adenovirus serotype 5 serotype 5 cell receptor binding site fiber was substituted with a serotype 35 fiber to prepare a vector introduced into the adenovirus (see FIG. 4), and the vector was It was confirmed that antigen expression level, antibody production amount and T cell reactivity were high, antibody production and expression period were long, and liver toxicity was not observed ( FIGS.
- a vaccine prepared by loading an antigen in a vector in which part or all of the E4 gene was deleted and the E4 gene was rearranged into the E1 region was administered to mice and monkeys. It was confirmed that the amount of neutralizing antibody produced was similar to that of the vaccine in which the antigen was loaded on the Ad5/35 vector ( FIGS. 15 and 16 ).
- the coronavirus recombinant spike protein of the present invention is stable and not easily degraded in cells, and by effectively activating immune cells, the antibody production amount and T cell reactivity are high, and the vector of the present invention has high antigen expression. Since it was confirmed that the antibody production amount and T cell reactivity are high, the antibody production and expression period is long, and it does not show liver toxicity, it can be usefully used as a vaccine for preventing or treating coronavirus infection.
- pAdk35F A plasmid containing the adenovirus sequence (SEQ ID NO: 21) without the spike protein antigen was named pAdk35F (SEQ ID NO: 1, 34,030 bp) and constructed using the genome of adenovirus serotype 5 (Adenovirus type 5, Ad5).
- pAdk35F includes an adenovirus in which the E1 and E3 genes of the adenovirus are deleted, and the fiber, which is a cell receptor binding site of adenovirus serotype 5, is substituted with a fiber of serotype 35.
- the CMV (Cytomegalovirus) promoter, Tetracycline Operator (Tet O), restriction enzyme SwaI site, and SV40 poly A sequence are loaded in the E1 gene deletion region of pAdk35F.
- pCMV3-SARS-CoV-2 (Spike ORF) vector (Sino Biological, Cat. #: VG40589-UT, SEQ ID NO: 2, 9,858bp) loaded with a polynucleotide encoding a spike protein, an antigen expression gene. ) as a template to amplify the extracellular domain region of the spike protein antigen gene using the primer set for spike protein antigen amplification shown in Table 1 below, and then in-fusion cloning ligation with the pAdk35F vector digested with restriction enzyme SwaI (in-fusion cloning). ligation, Clontech, Cat.
- plasmid #1 vector (SEQ ID NO: 22).
- the portion encoding the spike protein is shown in SEQ ID NO: 3
- the base sequence of the adenovirus into which the spike protein is introduced is shown in SEQ ID NO: 23.
- the cleavage recognition sequence (SEQ ID NO: 6, amino acid sequence: TNSPRRAR) of domains S1 and S2 of the spike protein antigen of the pCMV3-SARS-CoV-2 (Spike ORF) vector used as a template for the polymerase chain reaction in Example 1 was sited pCMV3-SARS-CoV-2 (Spike IL) by substituting the TILR (Thr-Ile-Arg-Leu) sequence (SEQ ID NO: 7) with the primer set of Table 2 below using Site Directed Mutagenesis A vector was constructed as in 5.
- Plasmid #2 vector (SEQ ID NO: 24), an improved spike antigen expression vector, was constructed by cloning ligation, Clontech, Cat. #: 639648).
- the portion encoding the spike protein is shown in SEQ ID NO: 8
- the base sequence of the adenovirus into which the spike protein is introduced is shown in SEQ ID NO: 25.
- the cleavage recognition sequences (SEQ ID NO: 6, amino acid sequence: TNSPRRAR) of the spike antigen domains S1 and S2 of the pCMV3-SARS-CoV-2 (Spike ORF) vector used as a template for the polymerase chain reaction in Example 1 were site-directed.
- a pCMV3-SARS-CoV-2 (Spike GGGGS) vector was prepared by substituting the TGGGGSR linker sequence (SEQ ID NO: 11) using the primers in Table 3 below using the mutagenesis technique (Site Directed Mutagenesis).
- the vector substituted with the TGGGGSR sequence was amplified using the same primer set for spike antigen amplification in Table 1 as the #1 vector as a template, and then in-fusion cloning ligation with the pAdk35F vector digested with restriction enzyme SwaI (in-fusion cloning) ligation, Clontech, Cat. #: 639648) to construct an improved spike antigen expression vector, plasmid #3 vector (pAdCLD-CoV19 vector) (SEQ ID NO: 26).
- the portion encoding the spike protein is shown in SEQ ID NO: 12
- the base sequence of the adenovirus into which the spike protein is introduced is shown in SEQ ID NO: 27.
- cleavage recognition sequences (amino acid sequence: TNSPRRAR) of the spike antigen domains S1 and S2 of the pCMV3-SARS-CoV-2 (Spike ORF) vector used as a template for the polymerase chain reaction in Example 1 were subjected to site-directed mutagenesis ( Site Directed Mutagenesis) was substituted with the TGGGGSGGGGSGGGGSR sequence (SEQ ID NO: 15) using the primers in Table 4 below (pCMV3-SARS-CoV-2 (Spike GGGGSx3)).
- site-directed mutagenesis Site Directed Mutagenesis
- the vector substituted with the TGGGGSGGGGSGGGGSR sequence was amplified using the same primer set for spike antigen amplification as the plasmid #1 vector as a template, and then in-fusion cloning ligation (Clontech) with the pAdk35F vector digested with restriction enzyme SwaI. , Cat. #: 639648) to construct a plasmid #4 vector (SEQ ID NO: 28), which is an improved spike antigen expression vector.
- SEQ ID NO: 28 an improved spike antigen expression vector.
- the portion encoding the spike protein is shown in SEQ ID NO: 16
- the base sequence of the adenovirus into which the spike protein is introduced is shown in SEQ ID NO: 29.
- adenovirus vectors (#1 to #4 vectors) were produced using the HEK293R cell line.
- adenovirus an initial adenovirus vector was produced by transforming 12.5 ⁇ g of each vector along with 25 ⁇ l of Lipofectamine 2000 (ThermoFisher, Cat. #: 11668027) into HEK293R cell line, which was about 80% filled in T25 plates.
- Lipofectamine 2000 ThermoFisher, Cat. #: 11668027
- Each initially produced adenovirus was amplified by infecting 20 T175 flasks containing 4 ⁇ 10 7 HEK293R cell lines.
- the amplified adenovirus #1 to #4 vectors were first subjected to cesium chloride density gradient centrifugation (1.2 g/ml CsCl+1.4 g/mL CsCl, 32,000 RPM, 90 minutes). and secondary (1.35 g/ml CsCl, 32,000 RPM, 18 hours), and dialysis (20 mM Tris-HCl, 25 mM sodium chloride, 2.5% glycerol) to produce a finished adenovirus.
- the antigen expression level in the THP-1 cell line derived from mononuclear cells was measured by flow cytometry (FACS).
- THP-1 cells were seeded in a 96-well culture dish so that 2.5 ⁇ 10 5 cells were per well, and each vector was inoculated into the cells to obtain a multiplicity of infection (MOI) of 10, then 24 incubated for hours. Thereafter, the cells in each well were transferred to a 1.5 ml tube, added 500 ⁇ l of FACS buffer, and centrifuged (5000 rpm, 3 minutes, 4° C.). After removing the supernatant, 50 ⁇ l each of a viability indicator dye (eFluorTM450, ebioscience, cat #:65-0863-14) diluted at 1:1000 was added, and surface staining was performed at 4°C for 30 minutes.
- a viability indicator dye eFluorTM450, ebioscience, cat #:65-0863-14
- the cell fixation/permeabilization concentrate ebioscience, Cat. #: 00-5123-43
- the cell fixation/permeate diluent ebioscience, Cat. #: 00-5223-56
- Spike antigen staining was performed by diluting SARS-CoV-2 spike protein antibody (GeneTex, Cat. #: GTX632604) in permeation buffer (ebioscience, Cat.
- Example 3 As a result, as shown in FIG. 6 , it was confirmed that the adenovirus #3 vector prepared in Example 3 had the highest antigen expression, which is the ability to produce a protein.
- a Western blot analysis method for measuring the expression level of the spike protein antigen excreted out of the cell is as follows. After dispensing THP-1 and RD cells to 5 ⁇ 10 5 cells per well in a 6-well culture dish, each vector was inoculated into the cells at an MOI of 50, and then cultured for 24 hours. After harvesting the culture medium through centrifugation, the culture medium was concentrated using Microcon (Millipore, 50,000 MWCO, Cat. #: UFC805024), and the cultured cells were treated with RIPA buffer (ThermoFisher, Cat. #: 89901). was used to decompose into protein units. The total amount of protein in the concentrated culture medium was measured using a BCA protein assay kit (Thermo Fisher, Cat. #: 23225).
- spike protein (trimer, about 250 kDa or more) in the concentrated culture medium sample
- 60 ⁇ g/well of sample using BoltTM Bis-Tris 4-12% plus, gel (ThermoFisher, Cat. #: NW04120BOX) was electrophoresed at 180 V.
- the electrophoresed gel was transferred to the PVDF membrane for 10 minutes at 20V using the iBlot 2 Dry blotting system (Invitrogen, Cat. #: IB21001). After reacting with Rabbit SARS-CoV-2 spike antibody (GeneTex, Cat. #: GTX135360) and Goat anti-Rabbit IgG H&L (HRP), respectively, SARS with ECL prime western blotting detection reagent (Amersham, Cat. #: RPN2232) - Trimeric spike protein possessed by CoV-2 was detected.
- the adenovirus #3 vector prepared in Example 3 had the highest antigen expression level for generating and excreting proteins.
- the spike antigen expression vector (vector #1 to vector #4) prepared in Example 3 was intramuscularly injected into 6-7 week old BALB/c mice at 2 ⁇ 10 8 IFU/mouse, 6 mice per group. . After administration, a blood sample of about 300 ⁇ l was collected by orbital blood sampling from the mice at 2-3 weeks. Thereafter, plasma was separated by centrifugation (8000 rpm, 10 minutes, 20° C.), and the amount of neutralizing antibody present in the blood was measured by enzyme-linked immunosorbent assay (ELISA).
- ELISA enzyme-linked immunosorbent assay
- Enzyme-linked immunosorbent assay was performed by dissolving spike protein (Acro Biosystems, Cat. #: SPN-C52H84) in PBSN (PBS 1 L + Sodium Azide 0.01 g) in a 96-well plate and coating at 100 ng/well, followed by 16 hours. The reaction was refrigerated at 4°C. After 16 hours of coating the 96-well plate, the coated protein was removed and washed 3 times with PBS, 150 ⁇ l blocking buffer (Blocking buffer, PBSN+BSA 1%) was added to each well and reacted (37° C., 90 minutes).
- the plasma is diluted 6,400 times in dilution buffer (PBSN+0.1% BSA+0.05% Tween-20), and after the blocking reaction is completed, the plate is washed 3 times with PBS, and then the diluted plasma sample is 50 ⁇ l each. It was put into a well and reacted (37°C, 3 hours). After the reaction, PBS was washed 3 times and secondary antibodies, GAM-IgG-HRP (southernbiotech, Cat. #: 1030-05), GAM-IgM-HRP (southernbiotech, Cat.
- the adenovirus (vectors #1 to #3) prepared in Example 3 was intramuscularly injected into 8-week-old BALB/c mice by 1 ⁇ 10 9 VP/Mouse or 2 ⁇ 10 8 VP/Mouse, 6 mice per group. carried out After administration, a blood sample of about 300 ⁇ l was collected from the mice through orbital blood sampling at 2 to 4 weeks. Thereafter, plasma was separated by centrifugation (8000 rpm, 10 minutes, 20° C.), and the amount of antigen-specific antibody present in the blood was measured by enzyme-linked immunosorbent assay (ELISA) according to Example 5-1.
- ELISA enzyme-linked immunosorbent assay
- the amount of antibody produced in monkeys according to the injection of the adenovirus (#1 and #3 vectors) prepared in Example 3 was compared.
- the adenovirus #1 and #3 vectors constructed in Example 3 were intramuscularly injected into 6-7 week-old cynomolgus monkeys at 1 ⁇ 10 11 VP/Monkey, two per group.
- blood samples were collected through venous blood sampling of monkeys, and the amount of antibody present in the blood was measured using plasma obtained by separating blood cells (8000rpm, 10 minutes, 20°C) by enzyme-linked immunosorbent test ( ELISA) and Pseudovirus Neutralization Assay.
- spike protein (Acro Biosystems, Cat. #: SPN-C52H84) was dissolved in PBSN in a 96-well plate and coated at 100 ng/well, followed by refrigeration at 4° C. for 16 hours. After 16 hours of coating the 96-well plate, the coated protein was removed, washed 3 times with PBS, and 150 ⁇ l of blocking buffer was added to each well and reacted (37° C., 90 minutes). Plasma was diluted 1600-fold in dilution buffer during the reaction time, and after the blocking reaction was completed, the plate was washed 3 times with PBS.
- HEK293T-hACE2 human angiotensin converting enzyme 2; hACE2
- hACE2 human angiotensin converting enzyme 2
- HEK293T-hACE2 96-well plates in culture were inoculated with 2 ⁇ g/well (200 ⁇ l) polybrene (Merck, Cat. #: TR-1003-G) and cultured for 2 days. .
- a neutralizing antibody in plasma that binds to the spike protein was confirmed by measuring the degree to which the pseudovirus was infected with the HEK293T-hACE2 cell line and expressed the luciferase protein.
- Cells cultured for 2 days were lysed with 25 ⁇ g cell lysis reagent (Promega, Cat. #: E153A) after washing with DPBS.
- the lysed sample was transferred to an opaque 96-well plate, 100 ⁇ g luciferase detection indicator (Promega, Cat. #: E151A) was added, and a luminometer (Luminometer Centro XS3 LB960, Berthold Technologies, Cat. #: LB960, software: Mikro) was added. 2000 program) was used to measure the degree of light emission (detection indicator injection - 5 seconds mixing - 2 seconds delay - 10 seconds measurement) and analyzed.
- liver toxicity was compared in monkeys according to the injection of the adenovirus (#1 and #3 vectors) prepared in Example 3 above.
- the adenovirus #1 and #3 vectors prepared in Example 3 were intramuscularly injected into 6-7 week-old cynomolgus monkeys at 1 ⁇ 10 11 VP/Monkey, two per group. Blood was collected from all animals before administration (pre), at intervals of 9, 22, and 36 days. All blood collection was carried out in a fasting state (negative water is freely consumed), and about 3 ml of blood was collected from the femoral vein using a disposable syringe (3ml, 23G, Korea Vaccine, KOR).
- Example 7 Measurement of T cell reactivity when an antigen expression vector was injected into mice and monkeys
- T cell reactivity in mice following injection of the spike antigen expression vector (vector #1, vector #3) prepared in Example 3 was measured as follows.
- each mouse administered with the vaccine of Example 5 was sacrificed at the 10th week of administration, blood was collected through orbital blood collection, and the spleen was isolated.
- Splenocytes were pulverized using a 70 ⁇ m cell strainer (BD Bioscience, Cat. #: 352350) to form single cells, and then red blood cells were removed using ACK lysis buffer (Gibco, Cat. #: A1049201).
- Blood samples were isolated from peripheral blood mononuclear cells (PBMCs) using density gradient centrifugation using Histopaque®-1077 (Sigma-Aldrich, Cat. #: 10771).
- the isolated splenocytes and PBMCs were suspended in RF10 culture medium (RPMI1640 + 10% FBS + 1% penicillin/streptomycin) at 2 ⁇ 10 6 cells/ml after measuring the number of cells.
- Peptivator SARS-CoV-2 Prot_S (Miltenyi Biotec, Cat. #: 130-126-701) plates coated with mouse IFN- ⁇ ELISPOT kit (CTL, Cat. #: MIFNgp-2M/10) in preheated RF10 culture medium. ) was added at a concentration of 50 ⁇ g/ml to fill the wells by 100 ⁇ l and stored in a 37° C. CO 2 incubator for 20 minutes (wells were performed in duplicate for each group). Thereafter, 100 ⁇ l of each of the resuspended mouse spleen cells and PBMC-containing culture solution was added to each well and cultured at 37° C. in a CO 2 incubator.
- Anti-CD3 mAb (1 ⁇ g/ml, Biolegend, Cat. #: 100331) was added to the positive control wells, and only RF10 was added to the negative control wells without cells. After incubation for 24 hours, ELISPOT development was carried out in the same manner as the manufacturer's protocol included in the Mouse IFN- ⁇ ELISPOT kit. After color development, the plate was dried at room temperature for 24 hours by blocking light, and then analyzed using an Immunospot S6 micro analyzer (CTL). The results were converted into 1 ⁇ 10 6 PBMC units.
- CTL Immunospot S6 micro analyzer
- the vaccine composition of the present invention can actively induce not only antibody production but also memory immune response by T cells when re-infected with SARS-CoV-2.
- PBMC peripheral blood mononuclear cells
- T cell reactivity in monkeys following injection of the adenovirus (#1 vector, #3 vector) prepared in Example 3 was measured as follows.
- PBMCs were isolated by density gradient centrifugation using Histopaque®-1077 (Sigma-Aldrich, Cat. #: 10771), and the remaining red blood cells were ACK lysis buffer (Gibco, Cat. #: A1049201). it was removed The isolated PBMCs were suspended in RF10 media (RPMI1640 + 10% FBS + 1% penicillin/streptomycin) at 2E+06 cells/ml after measuring the number of cells.
- RF10 media RPMI1640 + 10% FBS + 1% penicillin/streptomycin
- Peptivator SARS-CoV-2 Prot_S (Miltenyi Biotec, Cat. #: 130-126-701) plates coated with Human IFN- ⁇ ELISPOT kit (CTL, Cat. #: HIFNgp-2M/10) in preheated RF10 culture medium. ) was added at a concentration of 100 ⁇ g/ml, and the wells were filled by 100 ⁇ l and stored in a 37 ° C. Then, 100 ⁇ l of each of the suspended PBMC-containing culture medium was added to the wells and cultured at 37° C., CO 2 incubator.
- CTL Human IFN- ⁇ ELISPOT kit
- the antibody production amount was compared after injection of the #3 vector prepared in Example 3 and the #3 heterologous vector (SEQ ID NO: 30) prepared as an equivalence comparison group into mice.
- the #3 heterologous vector is a form in which the E4 gene among the adenovirus genes of the #3 vector used in Example 3 is rearranged to the E1 region of the viral genome, and the knob gene of E3 is substituted with Ad35 in the E1/E3 deletion Ad5 Ad5/
- Ad5 Ad5/ Ad5 Ad5/
- 711 bp of E4orf6 is deleted, and the recombinant spike protein (a fusion protein in which the SARS-CoV-2 S1 domain and S2 domain are linked by a GGGGS linker) and the E4orf6 gene are inserted in the forward direction at the E1 deletion site.
- Production method is the same as that of Example 3.
- the spike antigen expression vector (#3 vector and #3 heterologous vector) was intramuscularly injected into 6-7 week-old BALB/c mice at 1 ⁇ 10 9 VP/mouse, 5 in each group. After administration, a blood sample of about 300 ⁇ l was collected by orbital blood sampling from the mice at the 9th week. Thereafter, plasma was separated by centrifugation (8000 rpm, 10 minutes, 20° C.), and the amount of neutralizing antibody present in the blood was measured by Pseudovirus Neutralization Assay.
- HEK293T-hACE2 human angiotensin converting enzyme 2; hACE2
- hACE2 human angiotensin converting enzyme 2
- plasma collected through vein blood from mice was diluted 100 to 6,400 times four-fold and reacted with 7 ⁇ 10 5 TU/ml of pseudovirus (lentivirus expressing spike protein and luciferase) for 1 hour.
- pseudovirus lentivirus expressing spike protein and luciferase
- a neutralizing antibody in plasma that binds to the spike protein was confirmed by measuring the degree to which the pseudovirus was infected with the HEK293T-hACE2 cell line and expressed the luciferase protein.
- Cells cultured for 3 days were lysed with 25 ⁇ g cell lysis reagent (Promega, Cat. #: E153A) after washing with DPBS.
- the lysed sample was transferred to an opaque 96-well plate, 100 ⁇ g luciferase detection indicator (Promega, Cat. #: E151A) was added, and a luminometer (Luminometer Centro XS3 LB960, Berthold Technologies, Cat. #: LB960, software: Mikro) was added. 2000 program) by measuring the degree of light emission (detection indicator injection - 5 seconds mixing - 2 seconds delay - 10 seconds measurement) and analyzed.
- the #3 antigen vector and the #3 antigen heterologous vector showed excellent antibody production, and there was no difference between the two groups.
- the above results suggest that antigen #3 has an equivalent level of neutralizing antibody activity even when loaded on different platform vectors.
- the amount of antigen-specific neutralizing antibody produced was compared after injection of the #3 vector of Example 8-1 to the #3 heterologous vector prepared in the equivalence comparison group into cynomolgus monkeys.
- the spike antigen expression vector (#3 vector and #3 heterologous vector) was intramuscularly injected into 6-7 week-old monkeys at 2 ⁇ 10 10 VP/Monkey, two per group.
- blood samples were collected through venous blood sampling of monkeys, and the amount of antibody present in the blood was analyzed using plasma from which blood cells were separated (8000rpm, 10 minutes, 20°C). ) was measured.
- HEK293T-hACE2 human angiotensin converting enzyme 2; hACE2
- hACE2 human angiotensin converting enzyme 2
- plasma collected through vein blood from monkeys was diluted 100 to 6,400 times four-fold and reacted with 7 ⁇ 10 5 TU/ml pseudovirus (lentivirus expressing spike protein and luciferase) for 1 hour.
- pseudovirus lentivirus expressing spike protein and luciferase
- a neutralizing antibody in plasma that binds to the spike protein was confirmed by measuring the degree to which the pseudovirus was infected with the HEK293T-hACE2 cell line and expressed the luciferase protein.
- Cells cultured for 3 days were lysed with 25 ⁇ g cell lysis reagent (Promega, Cat. #: E153A) after washing with DPBS.
- the lysed sample was transferred to an opaque 96-well plate, 100 ⁇ g luciferase detection indicator (Promega, Cat. #: E151A) was added, and a luminometer (Luminometer Centro XS3 LB960, Berthold Technologies, Cat. #: LB960, software: Mikro) was added. 2000 program) by measuring the degree of light emission (detection indicator injection - 5 seconds mixing - 2 seconds delay - 10 seconds measurement) and analyzed.
- mice 6 to 7-week-old BALB/c mice were injected with the recombinant spike protein derived from vectors #1 to #3, 6 mice in each group.
- 10 ⁇ g of #1 to #3 recombinant spike proteins were diluted in 150 ⁇ l of each PBS solution (pH 7.4) and administered by intramuscular injection.
- PBS solution pH 7.4
- plasma was separated through centrifugation (8000 rpm, 10 minutes, 20° C.) to determine the amount of neutralizing antibody present in the blood. It was measured by enzyme-linked immunosorbent assay (ELISA) and pseudovirus neutralization assay.
- ELISA enzyme-linked immunosorbent assay
- Enzyme-linked immunosorbent assay was performed by dissolving spike protein (Acro Biosystems, Cat. #: SPN-C52H84) in PBSN (PBS 1L + Sodium Azide 0.01g) in a 96-well plate and coating at 100 ng/well, followed by 4 for 16 hours. The reaction was refrigerated at °C.
- the coated protein was removed and washed 3 times with PBS, 150 ⁇ l blocking buffer (Blocking buffer, PBSN+BSA 1%) was added to each well and reacted (37° C., 90 minutes), During the reaction time, the plasma is diluted 6,400 times in dilution buffer (PBSN+0.1% BSA+0.05% Tween-20), and after the blocking reaction is completed, the plate is washed 3 times with PBS, and then the diluted plasma sample is 50 ⁇ l each. It was put into a well and reacted (37°C, 3 hours). After the reaction, PBS was washed 3 times and secondary antibodies, GAM-IgG-HRP (southernbiotech, Cat.
- GAM-IgM-HRP (southernbiotech, Cat. #: 1020-05) were added to the dilution buffer 1000 After diluting twice, 50 ⁇ l of each was put into the wells and reacted (37° C., 2 hours). After removing the secondary antibody and washing with PBS 5 times, 50 ⁇ l of color development reagent (TMB Peroxidase Substrate buffer, ROCKLAND, Cat. #: TMBE-1000) is added at a time to develop color for 15 minutes, and 50 ⁇ l of 0.25N HCl is added to stop color development. , the sample was analyzed with a microreader at a wavelength of 450 nm.
- TMB Peroxidase Substrate buffer ROCKLAND, Cat. #: TMBE-1000
- HEK293T-hACE2 human angiotensin converting enzyme 2; hACE2
- hACE2 human angiotensin converting enzyme 2
- plasma collected through intravenous blood sampling of mice was diluted 100 to 6,400 times (4 fold), and 7 ⁇ 10 5 TU/ml of pseudovirus (lentivirus expressing spike protein and luciferase) was mixed with After incubation for 1 hour together (37° C.), the cultured HEK293T-hACE2 96-well plate was cultured for 3 days.
- a neutralizing antibody in plasma that binds to the spike protein was confirmed by measuring the degree to which the pseudovirus was infected with the HEK293T-hACE2 cell line and expressed the luciferase protein.
- Cells cultured for 3 days were lysed with 25 ⁇ g cell lysis reagent (Promega, Cat. #: E53A) after washing with DPBS, and the lysed sample was transferred to an opaque 96-well plate and then 100 ⁇ g luciferase detection indicator (Promega, Cat. #: E151A) and measure the luminescence level using a luminometer (Luminometer Centro XS3 LB960, Berthold Technologies, Cat. #: LB960, software: Mikro 2000 program) (detection indicator injection - 5 seconds mixing - 2 seconds delay - 10 sec measurement) and analyzed.
- a luminometer Luminometer Centro XS3 LB960, Berthold Technologies, Cat. #: LB960, software: Mikro 2000 program
- the plasmid #2 to plasmid #3 vectors prepared in Examples 1 and 2 were introduced into E. coli and cultured for one day in 200 mL LB culture medium.
- the cultured plasmids were harvested using the QIAGEN Endofree Plasmid Maxi kit (Cat. # 12362) and then administered to 6-7 week-old BALB/c mice in each group.
- 100 ⁇ g of vectors #2 to p#3 were diluted in 50 ⁇ l of each PBS solution (pH 7.4) and administered by intramuscular injection.
- Enzyme-linked immunosorbent assay was performed by dissolving spike protein (Acro Biosystems, Cat. #: SPN-C52H84) in PBSN (PBS 1L + Sodium Azide 0.01 g) in a 96-well plate and coating at 100 ng/well, followed by 4 for 16 hours. The reaction was refrigerated at °C.
- the coated protein was removed and washed 3 times with PBS, 150 ⁇ l blocking buffer (Blocking buffer, PBSN+BSA 1%) was added to each well and reacted (37° C., 90 minutes), During the reaction time, the plasma is diluted 6,400 times in dilution buffer (PBSN+0.1% BSA+0.05% Tween-20), and after the blocking reaction is completed, the plate is washed 3 times with PBS, and then the diluted plasma sample is 50 ⁇ l each. It was put into a well and reacted (37°C, 3 hours). After the reaction, PBS was washed 3 times and secondary antibodies, GAM-IgG-HRP (southernbiotech, Cat.
- GAM-IgM-HRP (southernbiotech, Cat. #: 1020-05) were added to the dilution buffer 1000 Dilute twice, put in each well of 50 ⁇ l, and react (37° C., 2 hours). After removing the secondary antibody and washing with PBS 5 times, 50 ⁇ l of color development reagent (TMB Peroxidase Substrate buffer, ROCKLAND, Cat. #: TMBE-1000) is added at a time to develop color for 15 minutes, and 50 ⁇ l of 0.25N HCl is added to stop color development. , the sample was analyzed with a microreader at a wavelength of 450 nm.
- TMB Peroxidase Substrate buffer ROCKLAND, Cat. #: TMBE-1000
- HEK293T-hACE2 human angiotensin converting enzyme 2; hACE2
- hACE2 human angiotensin converting enzyme 2
- plasma collected through intravenous blood sampling of mice was diluted 100 to 6,400 times (4 fold), and 7 ⁇ 10 5 TU/ml of pseudovirus (lentivirus expressing spike protein and luciferase) was mixed with After incubation for 1 hour together (37° C.), the cultured HEK293T-hACE2 96-well plate was cultured for 3 days.
- a neutralizing antibody in plasma that binds to the spike protein was confirmed by measuring the degree to which the pseudovirus was infected with the HEK293T-hACE2 cell line and expressed the luciferase protein.
- Cells cultured for 3 days are lysed with 25 ⁇ g cell lysis reagent (Promega, Cat. #: E153A) after washing with DPBS.
- the lysed sample was transferred to an opaque 96-well plate, 100 ⁇ g luciferase detection indicator (Promega, Cat. #: E151A) was added, and a luminometer (Luminometer Centro XS3 LB960, Berthold Technologies, Cat. #: LB960, software: Mikro) was added. 2000 program) by measuring the degree of light emission (detection indicator injection - 5 seconds mixing - 2 seconds delay - 10 seconds measurement) and analyzed.
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Abstract
Description
서열(5'→3') | 서열번호 | |
정방향 프라이머 | TCC AGC CTC CGA TTT GCC ACC ATG TTT GTG TTC CTG G | 4 |
역방향 프라이머 | GAT TAT GAT CAA TTT TCA TGG CCA CTT GAT GTA TTG TTC | 5 |
서열(5'→3') | 서열번호 | |
정방향 프라이머 | AGA CCA TCC TCA GGT CTG TGG CAA GCC AGA G | 9 |
역방향 프라이머 | CCT CCT ACC AGA CCC AGA CCA TCC TCA GGT | 10 |
서열(5'→3') | 서열번호 | |
정방향 프라이머 | CGG TGG CGG TGG GTC GAG GTC TGT GGC AAG CCA GAG | 13 |
역방향 프라이머 | GAC CCA CCG CCA CCG GTC TGG GTC TGG TAG GAG G | 14 |
서열(5'→3') | 서열번호 | |
정방향 프라이머 | GGG CGG TGG TGG GTC GGG TGG CGG CGG TTC CAG GTC TGT GGC AAG CCA GAG | 17 |
역방향 프라이머 | GAC CCA CCA CCG CCC GAC CCA CCG CCA CCG GTC TGG GTC TGG TAG GAG G | 18 |
Claims (20)
- 코로나바이러스 스파이크 단백질(Spike protein)의 S1 및 S2 유전자 사이의 절단 인지 서열이 제거되고 링커 서열을 도입한 재조합 스파이크 단백질.
- 제1항에 있어서, 상기 코로나바이러스는 SARS-CoV, MERS-CoV 또는 SARS-CoV-2인 것을 특징으로 하는, 단백질.
- 제2항에 있어서, 상기 코로나바이러스는 SARS-CoV-2인 것을 특징으로 하는, 단백질.
- 제1항에 있어서, 상기 링커는 (GGGGS)n으로 구성되는 것을 특징으로 하는, 단백질.
- 제4항에 있어서, 상기 n은 1 내지 5의 정수인 것을 특징으로 하는, 단백질.
- 제1항 내지 제5항 중 어느 한 항에 있어서, 상기 링커 서열로 연결된 스파이크 단백질 항원은 안정성(stability)이 증가된 것을 특징으로 하는, 단백질.
- 제1항 내지 제5항 중 어느 한 항에 있어서, 상기 링커 서열로 연결된 스파이크 단백질 항원은 항원 발현도가 증가하는 것을 특징으로 하는, 단백질.
- 코로나바이러스 스파이크 단백질(Spike protein)의 S1 및 S2 유전자 사이의 절단 인지 서열이 제거되고 링커 서열을 도입한 재조합 스파이크 단백질을 코딩하는 폴리뉴클레오티드.
- 제8항에 있어서, 상기 코로나바이러스는 SARS-CoV, MERS-CoV 또는 SARS-CoV-2인 것을 특징으로 하는, 폴리뉴클레오티드.
- 제8항에 있어서, 상기 링커 서열은 (GGGGS)n으로 구성되는 것을 특징으로 하는, 폴리뉴클레오티드.
- 코로나바이러스 스파이크 단백질의 S1 및 S2 유전자 사이의 절단 인지 서열이 제거되고 링커 서열을 도입한 것을 특징으로 하는, 재조합 스파이크 단백질을 코딩하는 폴리뉴클레오티드를 포함하는 벡터.
- 제11항에 있어서, 상기 코로나바이러스는 SARS-CoV, MERS-CoV 또는 SARS-CoV-2인 것을 특징으로 하는, 벡터.
- 제12항에 있어서, 상기 코로나바이러스는 SARS-CoV-2인 것을 특징으로 하는, 벡터.
- 제11항에 있어서, 상기 벡터는 바이러스 또는 플라스미드인 것을 특징으로 하는, 벡터.
- 제14항에 있어서, 상기 바이러스는 아데노바이러스, 레트로바이러스, 렌티바이러스, modified vaccinia virus ankara(MVA), 아데노 연관 바이러스(Adeno-associated virus, AAV), 단순 헤르페스 바이러스(Herpes simplex virus) 또는 배큘로 바이러스(Baculovirus) 인 것을 특징으로 하는, 벡터.
- 제15항에 있어서, 상기 아데노바이러스는 Ad2, Ad4, Ad5, Ad11, Ad26, Ad35, ChAd68, FAd9 또는 PAd3인 것을 특징으로 하는, 벡터.
- 제15항 또는 제16항에 있어서, 상기 아데노바이러스는 항원 발현도가 높은 것을 특징으로 하는, 벡터.
- 코로나바이러스 스파이크 단백질의 S1 및 S2 유전자의 폴리뉴클레오티드를 포함하는 벡터를 포함하는 코로나바이러스 감염증 예방용 또는 치료용 백신.
- 제18항에 있어서, 상기 코로나바이러스 감염증은 SARS, MERS 또는 COVID-19인 것을 특징으로 하는, 코로나바이러스 감염증 예방용 또는 치료용 백신.
- 코로나바이러스 스파이크 단백질의 S1 및 S2 유전자의 폴리뉴클레오티드를 포함하는 벡터를 개체에 투여하는 단계를 포함하는 코로나바이러스 감염증을 예방 또는 치료하는 방법.
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CN202180052424.0A CN116348136A (zh) | 2020-08-27 | 2021-08-27 | 新型冠状病毒重组刺突蛋白、编码该重组刺突蛋白的多核苷酸、包含多核苷酸的载体以及包含载体的用于预防或治疗冠状病毒感染的疫苗 |
US18/042,913 US20230293670A1 (en) | 2020-08-27 | 2021-08-27 | Novel coronavirus recombinant spike protein, polynucleotide encoding same, vector comprising polynucleotide, and vaccine for preventing or treating coronavirus infection, comprising vector |
EP21862123.3A EP4205761A4 (en) | 2020-08-27 | 2021-08-27 | NOVEL RECOMBINANT CORONAVIRUS SPIKE PROTEIN, POLYNUCLEOTIDE ENCODING THE SAME, VECTOR COMPRISING THE POLYNUCLEOTIDE, AND VACCINE FOR THE PREVENTION OR TREATMENT OF CORONAVIRUS INFECTION, COMPRISING THE VECTOR |
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