摘要:
An enveloped viral particle producer or packaging cell, wherein the cell is genetically engineered to decrease expression of MHC-I on the surface of the cell.
摘要:
The present invention relates to techniques and methods for producing, purifying, inactivating and analyzing SARS-CoV-2. The present invention relates to the method for producing an antigen corresponding to the SARS-COV-2 virus inactivated by gamma radiation. The method for producing an antigen corresponding to the SARS-COV-2 virus inactivated by gamma radiation is intended for use in the production of a novel vaccine, the antigen being used in the production of hyperimmune plasma in horses for serum therapy, and in different animal species for the production of antibodies/research inputs and the establishment of serum diagnosis techniques. The present invention relates to the antigenic composition including the antigen corresponding to the inactivated SARS-COV-2 virus and a pharmaceutically acceptable diluent excipient. The invention also relates to a method for producing anti-SARS-CoV-2 immunoglobulins using the SARS-COV-2 virus inactivated by gamma radiation.
摘要:
Multiple DIVA vaccines effective against porcine reproductive and respiratory syndrome virus (PRRSV) are disclosed. The DIVA vaccines may be negative DIVAs or positive DIVAs. The DIVA vaccines may be produced by modifying the nsp2 region of a modified live virus vaccine. The modification may be one or more deletions only (negative DIVAs) or a deletion with an insertion (positive DIVAs). The insertion may be of an epitope tag, such as a V5, S-Tag, or FLAG tag. Produced DIVA vaccines may be stable through multiple passes and thus may be effective for production and vaccination of animals.
摘要:
The invention involves a method for modulating leukocyte activity, comprising delivering to a leukocyte a vector containing nucleic acid molecule(s), whereby the leukocyte contains Cas9 and the vector expresses one or more RNAs to guide the Cas9 to introduce mutations in one or more target genetic loci in the leukocyte, thereby modulating expression of one or more genes expressed in the leukocyte. The invention also involves identifying genes associated with leukocyte responses and experimental modeling of aberrant leukocyte activation and diseases associated with leukocytes by introducing mutations into leukocytes. The invention comprehends testing putative treatments with such models, e.g., testing putative chemical compounds that may be pharmaceutically relevant for treatment or gene therapy that may be relevant for treatment, or combinations thereof. The invention allows for the study of genetic diseases and putative treatments to better understand and alleviate leukocyte associated diseases.
摘要:
The disclosure relates to a fusion protein comprising at least a first and a second peptide, wherein —the second peptide comprises a targeting region and a first and a second interaction region, —the second peptide is located on the surface of the fusion protein; —the second peptide comprises at least two interaction pairs, wherein an interaction pair is formed by an amino acid of the first interaction region and an amino acid of the second interaction region, —the interaction between the amino acids of an interaction pair is covalent or non-covalent; and —at least one interaction pair is a covalent interaction pair in which the amino acids are covalently bound, and to virus like particles (VLP) comprising the fusion protein for use as drug delivery system. Also provided are polynucleotides encoding the fusion protein, suitable expression vectors, host cells, production methods for the fusion protein and the VLP comprising the fusion protein.
摘要:
The present invention relates to vesicular stomatitis virus (VSV) matrix (M) protein mutants. One mutant M protein includes a glycine changed to a glutamic acid at position (21), a leucine changed to a phenylalanine at position (111) and a methionine changed to an arginine at position (51). Another M protein mutant includes a glycine changed to a glutamic acid at position (22) and a methionine changed to an arginine at positions (48) and (51). Yet another VSV M protein mutant includes a glycine changed to a glutamic acid at position (22), a leucine changed to a phenylalanine at position (110) and a methionine changed to an arginine at positions (48) and (51). The present invention is directed also to recombinant VSVs (rVSV) having these M mutants and to vaccines based on the rVSV having the M mutants of the present invention. These new rVSVs having the mutant M were significantly attenuated and lost virulence, including neurovirulence, and are capable of inducing an immune responses against an antigen of interest. In addition, a rVSV serotype Indiana having the first described M mutant is capable of efficient replication at 31° C., and of poor replication or incapable of replication at about 37° C. or higher.
摘要:
This disclosure provides attenuated swine influenza strains, particularly those produced via a reverse genetics approach, compositions comprising same, and methods of production and use thereof. The attenuated strains are engineered to encode HA proteins having additional glycosylation sites, relative to the HA proteins encoded by the corresponding virulent parental viruses. Advantageously, the attenuated influenza strains may be administered.
摘要:
Methods of treating cancer including administering to a subject with cancer a pharmaceutical composition including an effective amount of a chimeric VSV virus are disclosed. The chimeric viruses are based on a VSV background where the VSV G protein is replaced with one or more heterologous viral glycoproteins. In the most preferred embodiment, the VSV G protein is replaced with the glycoprotein from Lassa virus or a functional fragment thereof. The resulting chimeric virus is an oncolytic virus that is attenuated and safe in the brain, yet still retains sufficient oncolytic activity to infect and destroy cancer cells such glioblastoma, and to generate an immune response against infected cancer cells. Methods of using chimeric viruses as a platform for immunization against other pathogenic microbes are also provided.
摘要:
The present invention provides an attenuated strain of porcine pseudorabies virus (PRV), in which said attenuated strain of PRV is a variant strain of PRV with inactivation of gI/gE/11K/28K proteins. In addition, the present invention also provides a vaccine composition comprising the attenuated strain of PRV as an antigen, a preparation method and use thereof. Proved by immunogenicity and pathogenicity testing of the live vaccine, said live PRV vaccine can provide a good protection for pigs with no clinical signs observed, indicating excellent immune protection.
摘要翻译:本发明提供了猪伪狂犬病毒(PRV)的减毒菌株,其中所述减毒株PRV是具有gI / gE / 11K / 28K蛋白质失活的PRV的变体菌株。 此外,本发明还提供包含PRV的减毒菌株作为抗原的疫苗组合物,其制备方法和用途。 通过活疫苗的免疫原性和致病性检测证实,活疫苗疫苗可以为猪提供良好的保护,没有观察到临床症状,表明优良的免疫保护。