43 results about "Human astrovirus" patented technology

The present invention provides a method for modulating the complement cascade by depleting the plasma of the functional activity of complement proteins and thereby reducing or eliminating complement-mediated cell lysis. The invention provides a method for the therapeutic use of coat proteins and derivatives thereof from the Astroviradae family of viruses in the treatment of complement-mediated cell lysis and peptide mediators of inflammation. The invention provides a method for the therapeutic use of coat proteins and derivatives thereof from the Astroviradae family of viruses in the treatment of complement-mediated diseases. Methods are described herein where complement cascade, triggered by either the classical or alternative complement pathways, is prevented from effecting cell lysis and inflammation due to inhibition or depletion of one or more complement components in the serum following administration of astrovirus coat proteins or derivatives.

Provided herein are sequences of the genomes and encoded proteins of new astrovirus species, and variants thereof. Also provided are methods of detecting the new astrovirus species and diagnosing astrovirus infection, methods of treating or preventing astrovirus infection, and methods for identifying anti-astrovirus compounds.Provided are two new astrovirus species named HMOAstV-A and HMOAstV-B, and both are distantly related to known astroviruses. Also provided is a new method of classifying astroviruses, where there are three groups of human astroviruses, including HAstV, AstV-MLB, and HMOAstV.

Genes for proteins which spontaneously form dimers and / or oligomers can be recombinantly linked together, which upon expression in E. coli produces stable dimeric fusion proteins that spontaneously self-assemble into enormous, polyvalent complexes having increased immunogenicity and functionality. Linear, network and agglomerate complexes with enormous sizes and polyvalences are constructed using glutathione S-transferase, Norovirus P domains (NoV P− and NoV+), the protruding (P) domain of hepatitis E virus (HEV P), the astrovirus P domain (AstV), a monomeric peptide epitope (M2e of influenza virus), and / or a protein antigen (VP8* of rotavirus) fused in different combinations. The resulting complexes can contain hundreds to thousands NoV P-protein, HEV, AstV, M2e and / or VP8* copies and exhibit higher immunogenicity than the individual proteins alone. The large size and multivalent nature of the complexes are candidates as a bivalent or multivalent vaccines against Norovirus and other pathogens, and for generation of antibodies for diagnosis and research purposes.

This invention relates to the isolation and uses of novel avian astroviruses. The present invention also relates to vaccines, kits and methods for detection of a novel astrovirus. The present invention further relates to vaccination of avians, prevention and / or treatment of avian infections associated with astrovirus. Infections of poultry by this novel astrovirus are associated with runt stunting syndromes.

Provided herein are sequences of the genomes and encoded proteins of new astrovirus species, and variants thereof. Also provided are methods of detecting the new astrovirus species and diagnosing astrovirus infection, methods of treating or preventing astrovirus infection, and methods for identifying anti-astrovirus compounds.Provided are two new astrovirus species named HMOAstV-A and HMOAstV-B, and both are distantly related to known astroviruses. Also provided is a new method of classifying astroviruses, where there are three groups of human astroviruses, including HAstV, AstV-MLB, and HMOAstV.

The invention discloses a kit and a detection method for accurately and quantitatively detecting astrovirus and particularly relates to a group of primers and probes for detecting the astrovirus as well as the kit containing the primers and the probes and a detection method of the astrovirus, wherein the primers and the probes have nucleotide sequences shown in SEQ ID No. 1 to SEQ ID No. 3 in a sequence table. The invention provides the detection method for accurately and quantitatively detecting the astrovirus by using a droplet digital PCR (Polymerase Chain Reaction) technology; the method does not need to rely on certified reference materials or other standard substances, and has higher accuracy, sensitivity and repeatability, and is easy to standardize.

The invention is applicable to the technical field of biotechnology and medical detection and provides a diarrhea virus detection kit and method. The detection kit comprises PCR (polymerase chain reaction) liquid which comprises a PCR buffer solution, MgCl2, dNTP, DNA polymerase, primer pairs, probe sequences and Homo-tag, wherein the primer pairs and the probe sequences respectively aim at type I, type II and type IV of sapovirus, type I and type II of norovirus, rotavirus, adenovirus and astrovirus, the 5' ends of the probe sequences are connected with fluorophore, and the 3' ends of the probe sequences are connected with quencher. The detection kit provided by the invention can detect seven viruses (subtype) related to diarrhea at one time, and compared with a detection method in the prior art, the detection method provided by the invention has the advantages that operation is simple and convenient, a result is quick to read, and false positive is avoided.

The invention relates to a gene chip for detecting food-home virus and a kit, belonging to the inspection field. The surface of a solid phase carrier is fixed with a plurality of detection probes and quality control contrast probes, wherein, the detection probes consist of the probes for detecting hepatitis A virus, human astrovirus, norwalk virus G1, norwalk virus G2, rotavirus, polio virus 1, polio virus 2 and polio virus 3; and the quality control contrast probes consist of a spotting positive quality control probe, a chip hybridization positive quality control probe and a chip negative quality control probe. The gene chip and the kit have the advantages of: (1) high throughout: five common viruses are integrated and detected simultaneously, and the practicability is strong; (2) rapidness: the detection time is only 4 hours; (3) specificity: the false positive caused by the cross reaction is avoided; (4) flexibility: the detection flexibility of the chip is 10<8> virus particles per gram of the tissue sample, which is higher than that of RT-PCR; and (5) good repetitiveness and stable results. The gene chip and the kit can be widely applied to the food safety inspection of the inspections system.

The invention relates to a diarrhea-associated virus multiple gene detection system, a kit and application thereof. The detection system has a total of 9 pairs of primers, including 6 pairs of diarrhea virus, 2 pairs of human genome internal reference and 1 pair of system quality control internal reference primers. Diarrhea pathogens are respectively targeting human astrovirus, norovirus II, human enteric adenovirus and rotavirus, etc. The diarrhea pathogen multiple detection system and its kit of the present invention do not need conventional detection, and can directly perform synchronous detection and analysis of various diarrhea-related viruses on stool samples in the same reaction system, making up for the low throughput and consumption of conventional detection methods. Time-consuming and other shortcomings, it provides a comprehensive, accurate, and low-cost etiological diagnosis for the clinic at the first time, and provides an important reference for individualized drug use and precision medicine.