829 results about "Influenza A virus" patented technology

The present invention is based on the discovery that a high titer reassortant influenza virus is produced in mammalian cell culture by replacing the NS gene of the A / PuertoRico / 3 / 24 master strain with the NS gene of the A / England / 1 / 53 strain. The invention provides influenza viruses and vaccines generated in mammalian cells as well as methods for producing such. The invention further provides an influenza virus master strain and kits for generating reassortant influenza viruses in mammalian cell culture and methods of making and using the master strain.

The invention relates to a process for inhibiting the infection of influenza viruses and a polypeptide or protein medicine used therein. More particularly, the invention involves a process for inhibiting the highly pathogenic avian influenza virus (such as H5N1 subtype) infection and human influenza virus (such as H1N1 subtype and H3N2 subtype) infection, as well as the polypeptide or protein involved therein, and a polynucleotide encoding the polypeptide or protein and a vector or host cell expressing said polypeptide or protein.

The present invention concerns methods and means for identifying, producing, and engineering neutralizing antibodies against influenza A viruses, and to the neutralizing antibodies produced. In particular, the invention concerns neutralizing antibodies against various influenza A virus subtypes, including neutralizing antibodies against two or more of H1, H2, H3, H5, H7 and H9, such as, for example all of H1, H2, H3, and H5 subtypes, and methods and means for making such antibodies. More specifically, the invention concerns antibodies capable of neutralizing more than one, preferably all, isolates of an influenza A virus subtype.

Provided herein are methods of producing neutralizing monoclonal antibodies, by cyclical immunization, that cross-react with strains of Influenza virus of the same subtype or different subtypes. Also provided herein are compositions comprising such antibodies and methods of using such antibodies to diagnose, prevent or treat Influenza virus disease.

The invention provides a composition useful to prepare influenza A viruses, e.g., in the absence of helper virus.

The cold-adapted master strain A / Ann Arbor / 6 / 60 7PI (H2N2) and progenitor wild type E2(3) viral strains have been deposited and their genomic sequences identified. Seven nucleotide differences were found between the sequences identified herein and the previously published sequences for cold-adapted A / Ann Arbor / 6 / 60 genes. The cold-adapted live influenza virus of the present invention can be reassorted with a variety of epidemic wild type influenza viruses and used to produce vaccines to prophylactically and therapeutically treat influenza.

Provided herein are Salmonella enteritidis 13A strains and compositions comprising these strains. Also provided are methods of enhancing an immune response against Influenza A and methods of reducing morbidity associated with an Influenza A infection. Methods of enhancing an immune response to a vaccine vector by expressing a polypeptide of CD 154 capable of binding CD40 are also disclosed. Methods of developing a bacterial vaccine vector are disclosed. Methods of generating scarless site-specific mutations in a bacterium are also disclosed.

Described are binding molecules such as human monoclonal antibodies that bind to influenza virus H5N1 and have neutralizing activity against influenza virus H5N1. Also described are nucleic acid molecules encoding the antibodies, and compositions comprising the antibodies and methods of identifying or producing the antibodies. The antibodies can be used in the diagnosis, prophylaxis, and / or treatment of an influenza virus H5N1 infection. In certain embodiments, the antibodies provide cross-subtype protection in vivo, such that infections with H5, H2, H6, H9, and H1-based influenza subtypes can be prevented and / or treated.

The invention relates to an influenza virus subjected to site-directed mutation or an influenza virus with simultaneous mutation of multiple sites. The influenza virus can be derived from human and other animals. The invention further relates to a method of the site-directed mutated influenza virus. The method includes introducing UAG into an influenza virus genome according to a reverse inheritance technology and introducing unnatural amino acid into an influenza virus gene in a site-directed way according to a gene codon extension technology. The invention further relates to application of the site-directed mutated influenza virus or the influenza virus with multiple mutation site combinations, such as serving as attenuated live vaccines and copying controllable safe influenza virus models.

Disclosed are oligonucleotide amplification primers and detection probes specific for the amplification and detection of pathogenic organisms, including for example, specific Influenza A H1N1 viral isolates. Also disclosed is a biological organism identification kit including the disclosed nucleic acid probes and primers, as well as thermal cycling reagents that is both portable and durable, and may also be self-contained for remote, or in-field analysis and identification of particular influenza isolates from a variety of biological specimen types.

The invention discloses a respiratory pathogen multi-detection reagent kit. The respiratory pathogen multi-detection reagent kit has the advantages that the respiratory pathogen multi-detection reagent kit is based on multi-PCR (polymerase chain reaction) technologies, detection results can be determined by the aid of fluorescence resonance energy transfer via the melting temperature ranges, the respiratory pathogen multi-detection reagent kit can be used for qualitatively simultaneously detecting 16 types of respiratory pathogens, the 16 types of respiratory pathogens include 12 types of RNA(ribonucleic acid) viruses (influenza A viruses, influenza B viruses, H1N1 influenza A viruses, type A and type B respiratory syncytial viruses, type -1 / -2 / -3 parainfluenza viruses, type OC43 coronaviruses, type 229E coronaviruses, rhinoviruses and human metapneumovirus), 2 types of DNA (deoxyribonucleic acid) viruses (adenoviruses and bocavirus) and 2 types of bacteria (mycoplasma pneumoniae andbordetella pertussis), the respiratory pathogen multi-detection reagent kit is high in detection sensitivity, and the sensitivity even can reach 1 copy / reaction; the multi-detection reagent kit is good in specificity, and negative results of pathogens which have identical sampling sites and similar pathogenic mechanisms and are not in the detection range of the respiratory pathogen multi-detectionreagent kit can be obtained; the respiratory pathogen multi-detection reagent kit is short in operation time and easy to operate and can be used for quickly detecting the 16 types of respiratory pathogens in a single tube of a reaction system, the results are clear and are easy to interpret, and the like.

High throughput and virtual screening methods are disclosed that can identify potential anti-viral agents. The virtual screening methods identify agents that interact with a viral nucleoprotein binding site. The high throughput methods identify compounds that inhibit viral infection by binding to viral nucleoprotein. Also disclosed are pharmaceutical formulations useful for treating or preventing viral infections, especially influenza A.

The present disclosure provides methods, reagents and kits for the detection of all known human variants of influenza A virus and at least 90% of avian and swine variants of influenza A virus in a biological sample, based on amplification primers and detection probes that are specific to a highly conserved region of the influenza A matrix gene.

The invention relates to antibodies and antigen binding fragments thereof, that bind to hemagglutinin and neutralize infection of at least two different group 1 subtypes or at least two different group 2 subtypes of influenza A virus. The invention also relates to nucleic acids that encode, immortalized B cells and cultured single plasma cells that produce, and to epitopes that bind to, such antibodies and antibody fragments. In addition, the invention relates to the use of the antibodies, antibody fragments, and epitopes in screening methods as well as in the diagnosis, treatment and prevention of influenza A virus infection.