127 results about "Coronavirus vaccination" patented technology

The invention provides a SARS-CoV-2 vaccine using human type-5 replication-defective adenovirus as a vector. The vaccine uses E1 and E3 to be combined with replication-defective human type-5 adenovirus as the vector and HEK293 cells integrating adenovirus E1 gene as a packaging cell line, and a protective antigen gene carried is the 2019 SARS-CoV-2 S protein gene (Ad5-nCoV) which is subjected to optimization design. After the S protein gene is optimized, the expression level in transfected cells is increased significantly. The vaccine has good immunogenicity in mouse and guinea pig models, andcan induce a body to produce a strong cellular and humoral immune response in a short time. Studies on the protective effect of hACE2 transgenic mice show that after 14 days of single immunization ofAd5-nCoV, the viral load in lung tissue can be significantly reduced, and it is indicated that the vaccine has a good immunoprotective effect on the 2019 SARS-CoV-2. In addition, the vaccine is quick, simple and convenient to prepare, and can be mass-produced in a short period of time to respond to sudden outbreaks.

Disclosed herein are coronavirus Spike (S) proteins and nanoparticles comprising the same, which are suitable for use in vaccines. The nanoparticles present antigens from pathogens surrounded to and associated with a detergent core resulting in enhanced stability and good immunogenicity. Dosages, formulations, and methods for preparing the vaccines and nanoparticles are also disclosed.

The invention discloses a subunit coronavirus vaccine for dimerization-based receptor binding domains and belongs to the technical field of medicine. A baculovirus expresses RBD (receptor binding domain (E367-Y606) of MERS-CoV (middle east respiratory syndrome coronavirus) protein and RBD (R294-F515) of SARS-CoV (severe acute respiratory syndrome coronavirus) in insect cells, the RBDs may form a dimer through cysteine residue at 603 of S (spike) protein or form a dimer through cysteine residue at 512 of the S protein, and purified RBD protein dimer and monomer are used respectively to immunize Bald/c mice. The dimerized RBDs have the advantages that the defect that RBD monomers have poor immunogenicity is overcome and the generation of neutralizing antibodies in against MERS-CoV is increased greatly.

The invention discloses a recombinant novel coronavirus as well as a preparation method and application thereof. The invention firstly discloses a recombinant virus. Any one of an NS gene of an influenza virus, an HA gene of the influenza virus and an NA gene of the influenza virus of the recombinant virus is replaced. The invention further discloses application of the recombinant virus in preparation of a product for preventing and/or treating diseases caused by influenza virus and/or SARS-CoV-2. According to the invention, the SARS-CoV-2 antigen epitope and the influenza virus genome are operated from the gene level; the recombinant SARS-CoV-2 vaccine strain taking the influenza virus as the carrier is prepared on the basis of an RG technology, so that the problem of SARS-CoV-2 vaccine shortage is solved. The recombinant novel coronavirus will be a new milestone in the field of coronavirus vaccines, and the SARS-CoV-2 chimeric vaccine can protect more people from being harmed by theinfluenza virus and SARS-CoV-2.

The invention provides a novel coronavirus antigen epitope and application thereof. A super computer is used for simulating S, E, M and N protein structures of the novel coronavirus, and novel coronavirus epitopes SEQ ID NO 1-38 are obtained through calculation. The epitopes have very good immunogenicity; an antibody generated by inducing a part of epitope polypeptide has the effect of neutralizing the novel coronavirus; the antigen epitope can be combined with antibodies in serum of novel coronavirus patients at home and abroad, has the potential of resisting various novel coronavirus strains, and also has the potential of identifying and applying different strains. The epitope provided by the invention can be used for (1) research and development of novel coronavirus vaccines and universal coronavirus vaccines such as MERS viruses and SARS viruses; and (2) preparing a novel coronavirus antibody, and further detecting and typing viruses and treating diseases caused by the viruses. Thenovel coronavirus antigen epitope has a wide application prospect in the aspects of prevention of coronavirus and propagation and outbreak thereof, and detection and diagnosis of virus strains.

The present invention discloses a new coronavirus vaccine based on chimpanzee adenovirus type 68 and MERS-CoV full length membrane protein. The recombinant adenovirus is obtained by transfecting an adenovirus packaging cell with a recombinant plasmid and then performing cell culture; the recombinant plasmid is obtained by inserting a specific DNA molecule into a delta-E1 region of a chimpanzee adenovirus vector AdC68; the specific DNA molecule has a full-length MERS-CoV Spike protein encoding gene; and the adenovirus packaging cell has an adenovirus E1 gene. The present invention also protectsthe recombinant adenovirus expressing the full-length MERS-CoV Spike protein; and a starting strain of the recombinant adenovirus is chimpanzee adenovirus type 68 or non-replicating chimpanzee adenovirus type 68. The developed vaccine against the new coronavirus MERS-CoV has important theoretical guidance value and broad application prospects, and provides a possibility for radical cure of MiddleEast respiratory syndrome.

The invention discloses a SARS-CoV-2 coronavirus vaccine and a preparation method thereof. An S gene of a SARS-CoV-2 coronavirus is subjected to codon optimization, truncated body and mutant sequences of the S gene are introduced into a secretory defective adenovirus vector, and packaging is conducted to obtain a corresponding recombinant adenovirus; and the recombinant adenovirus can express SARS-CoV-2 virus related protein in vivo, processing, folding, glycosylation and other modifications are completed, the native conformation of S protein is basically maintained, and the characteristics of high biological activity, long half-life period, lasting immunogenicity and the like are achieved. According to the vaccine and the method, by adopting the defective adenovirus vector carrying secretory peptide, a recombinant adenovirus vaccine can be secreted out of cells after being expressed in vivo, so that the humoral immunity is activated.

The invention provides a novel coronavirus vaccine and a preparation method and application thereof. The encoding gene of the vaccine comprises a peptide fragment sequence, a Kozak sequence, an IgG signal peptide sequence and a human IgG Fc structural domain sequence, wherein the peptide fragment sequence contains the novel coronavirus and is combined with ACE2 in an S protein receptor binding domain RBD; the Kozak sequence and the IgG signal peptide sequence are positioned at the 5 'end of the peptide fragment sequence combined with ACE2 in the RBD; and the human IgG Fc structural domain sequence is positioned at the 3' end of the peptide fragment sequence combined with ACE2 in the RBD. The novel coronavirus vaccine has the advantages that the 1168 to 1569 sites (containing the peptide fragment combined with ACE2 in the RBD) of the encoding sequence from S protein are used as the gene sequence of antigen protein, and are modified, so that the expression ability, secretion ability and immunogenicity of the antigen protein are improved; the prepared DNA vaccine, protein vaccine and mRNA vaccine are directly injected into a human body or are injected into the human body afterbeing packaged by an adjuvant to express the corresponding antigen, and the body is induced to generate immune response; and the broad application prospect is realized in the fields of COVID-19 prevention and treatment.

The present invention is directed to a nucleic acid suitable for use in treatment or prophylaxis of an infection with a coronavirus, preferably with a Coronavirus SARS-CoV-2, or a disorder related to such an infection, preferably COVID-19. The present invention is also directed to compositions, polypeptides, and vaccines. The compositions and vaccines preferably comprise at least one of said nucleic acid sequences, preferably nucleic acid sequences in association a lipid nanoparticle (LNP). The invention is also directed to first and second medical uses of the nucleic acid, the composition, the polypeptide, the combination, the vaccine, and the kit, and to methods of treating or preventing a coronavirus infection, preferably a Coronavirus infection.

The invention discloses a novel coronavirus vaccine based on chimeric virus-like particles, and the vaccine contains chimeric virus-like particles as effective ingredients. The chimeric virus-like particles are mainly formed by the aggregation of a type of recombinant chimeric proteins, and the recombinant chimeric proteins are obtained by fusing the S protein receptor binding region of SARS-CoV-2virus into the major immune determining region of HBcAg. The vaccine of the present invention can produce a strong immune response in human bodies, and humans can resist new coronavirus infections after immunization.

The invention belongs to the technical field of biology, and particularly relates to a gene of a novel coronavirus B.1.351 South African mutant strain RBD and application of the gene. The nucleotide sequence of the gene of the novel coronavirus B.1.351 South African mutant strain RBD provided by the invention is shown as SEQ ID NO.1 or SEQ ID NO.6. The gene sequence of the wild type novel coronavirus South African B.1.351 South African mutant strain RBD is optimized, a relatively optimal sequence is determined by combining with screening, and the cloning expression efficiency generated by the optimized sequence is greatly improved as compared with the expression efficiency of the wild type novel coronavirus B.1.351 South African mutant strain RBD sequence, so that the gene of the novel coronavirus B.1.351 South African mutant strain RBD can be used for preparing a novel coronavirus vaccine.

The invention provides novel coronavirus SARS-CoV-2mRNA vaccines and a preparation method and application thereof. The invention provides three mRNA vaccines, namely RBD, S1 and S vaccines. The RBD vaccine disclosed by the invention can induce a high-titer antigen-specific IgG antibody and a virus neutralization antibody after immunization with one dose, the high-titer neutralization antibody can be maintained for at least 26 weeks, and remarkable immune protection can be provided for human ACE2 transgenic mice in serum adoptive transfer protection experiments. The RBD and S vaccine disclosed by the invention can induce immune protection capable of completely resisting SARS-CoV-2 virus infection in the human ACE2 transgenic mice after immunization with two doses. A large number of experimental results show that the mRNA vaccine provided by the invention has good immunogenicity, forms powerful immune protection after immunizing an organism, and has a huge development potential.

The present invention is directed live, attenuated coronavirus vaccines. The vaccine comprises a viral genome encoding a p59 protein having at mutation at a specific tyrosine residue, and may include other attenuating mutations. Such viruses show reduced growth and pathogenicity in vivo.

The present invention provides a recombinant virus which is efficacious and highly safe in preventing the onset of SARS infection and a vaccine for SARS coronavirus containing the same. The recombinant virus of the invention can express a SARS coronavirus gene.

The invention discloses an animal model for expressing human ACE2 and application of the animal model. A mouse AC E2 gene signal peptide sequence and a human ACE2 gene mature peptide sequence are combined and subjected to codon optimization and amplification to obtain an hACE2 sequence, and a recombinant adeno-associated virus AAV-hACE2 is further prepared; and recombinant adeno-associated virus AAV-hACE2 is sprayed to the lung of the mouse by intubation for at least two weeks to obtain a mouse model with lung and brain tissue highly expressing human ACE2. According to the invention, the modeling speed for constructing the novel coronapneumonia virus susceptible mouse model is relatively high, and modeling can be succeeded only in two weeks. The animal model fully reveals pathological characteristics of AAV-hACE2 mice infected with novel coronavirus and application of the AAV-hACE2 mice in novel coronavirus vaccines, so that the model is clear to be suitable for pharmacodynamic evaluation of the novel coronavirus vaccines.

The invention discloses an anti-novel coronavirus antibody. The antibody is a high-titer specific antibody extracted from chicken egg yolk, the chicken egg yolk is mainly obtained from eggs laid by immunized hens, and the immunized hens are healthy hens injected with novel coronavirus vaccines. The invention also discloses an adjuvant drug for preventing and controlling the novel coronavirus, which takes the antibody for resisting the novel coronavirus as a main component. The drug exerts the characteristics of the antibody for resisting the novel coronavirus, can be specifically combined withthe novel coronavirus of the oropharynx and the nasal cavity in a short time, is long in retention time, painless, non-irritant, good in safety performance and free of toxic and side effects, can beused for prevention and blocking of novel coronavirus infection and adjuvant therapy of early infection, and can be used for group virus prevention and control adjuvant medication.

The invention discloses a nucleic acid molecule for encoding a structural protein of a novel coronavirus and a novel coronavirus vaccine, and relates to the technical field of gene engineering. The base sequence of the nucleic acid molecule disclosed by the invention is as shown in any one of SEQ ID NO.1 to SEQ ID NO.4. The invention also discloses a preparation method of the nucleic acid molecule. The nucleic acid molecule provided by the invention can express the structural protein of the novel coronavirus more efficiently through codon optimization, and lays a foundation for development ofnovel coronapneumonia vaccines.

The invention relates to the field of antibody detection, in particular to a kit for detecting a new coronavirus neutralizing antibody and a detection method. The kit comprises a competition method kit and a double-sandwich method kit. The competition method kit comprises a detection card containing a recombinant S-RBD-C antigen marked by up-conversion luminescent particles, the double-sandwich method kit comprises a detection card containing a recombinant S-RBD-C antigen marked by up-conversion luminescent particles or an S1 antigen marked by up-conversion luminescent particles, and the recombinant S-RBD-C antigen contains at least one segment of additional amino acid sequence, and is used for forming disulfide bonds with free cysteine in the S-RBD antigen. The neutralizing antibody in a subject inoculated with the novel coronavirus vaccine or a human body infected with the novel coronavirus can be detected, quantitative evaluation can be carried out, the operation is simple, and the accuracy is high.