245 results about "Norovirus" patented technology

The present invention is directed to compounds, compositions and methods for treating or preventing cancer and viral infections, in particular, HIV, HCV, Norovirus, Saporovirus, cytomegalovirus (CMV), herpes viruses (HSV-1, HSV-2), Dengue virus, Yellow fever, or HBV in human patients or other animal hosts. The compounds are certain N⁴-hydroxycytidine nucleosides derivatives, modified monophosphate and phosphonates prodrugs analogs, and pharmaceutically acceptable, salts, prodrugs, and other derivatives thereof. In particular, the compounds show potent antiviral activity against HIV-1, HIV-2, HCV, Norovirus, Saporovirus, cytomegalovirus (CMV), herpes viruses (HSV-1, HSV-2), Dengue virus, Yellow fever, and HBV.

The present invention is directed to an artificial nucleic acid and to polypeptides suitable for use in treatment or prophylaxis of an infection with Norovirus or a disorder related to such an infection. In particular, the present invention concerns a Norovirus vaccine. The present invention is directed to an artificial nucleic acid, polypeptides, compositions and vaccines comprising the artificial nucleic acid or the polypeptides. The invention further concerns a method of treating or preventing a disorder or a disease, first and second medical uses of the artificial nucleic acid, polypeptides, compositions and vaccines. Further, the invention is directed to a kit, particularly to a kit of parts, comprising the artificial nucleic acid, polypeptides, compositions and vaccines.

The present invention is directed to compounds, compositions and methods for treating or preventing cancer and viral infections, in particular, HIV, HCV, Norovirus, Saporovirus, HSV-1, HSV-2, Dengue virus, Yellow fever, and HBV in human patients or other animal hosts. The compounds are certain 6-substituted purine monophosphates, and pharmaceutically acceptable, salts, prodrugs, and other derivatives thereof. In particular, the compounds show potent antiviral activity against HIV-1, HIV-2, HCV, Norovirus, Saporovirus, HSV-1, HSV-2, Dengue virus, Yellow fever, and HBV.

Antiviral protease inhibitors, including peptidyl aldehydes, peptidyl α-ketoamides, peptidyl bisulfite salts, and peptidyl heterocycles, are disclosed, along with related antiviral compounds, and methods of using the same to treat or prevent viral infection and disease. The compounds possess broad-spectrum activity against viruses that belong to the picornavirus-like supercluster, which include important human and animal pathogens including noroviruses, enteroviruses, poliovirus, foot-and-mouth disease virus, hepatitis A virus, human rhinovirus (cause of common cold), human coronavirus (another cause of common cold), transmissible gastroenteritis virus, murine hepatitis virus, feline infectious peritonitis virus, and severe acute respiratory syndrome coronavirus.

The invention relates to a kit for detecting GII type norovirus and applications thereof, concretely a primer pair and a probe for detecting the GII type norovirus, and a kit comprising the primer pair and the probe. The GII type norovirus in a sample cab be successfully detected by a recombinase polymerase amplification reaction, and can be quantified by fluorescence intensity. The kit has advantages of high sensitivity, strong singularity, short detection time, and constant and low reaction temperature, can be used for qualitative screening and quantitative determination for GII type norovirus in the sample, such as a clinic sample, foodstuff, an aquatic product, a water body, etc. accordingly, the kit can be prepared to be a diagnostic kit for GII type norovirus.

Provided is an anti-norovirus agent that has high norovirus-inactivating activity and is safe for the human body, and an anti-norovirus composition that contains the anti-norovirus agent and is useful for disinfection and infection control against the norovirus. The anti-norovirus agent includes, as an active ingredient, an extract from a plant of the genus Diospyros containing tannin (hereinafter referred to as a “persimmon extract”), preferably a persimmon extract produced by heating squeezed juice or an extract from the fruit of a plant of the genus Diospyros or treating the squeezed juice or the extract with an alcohol. The anti-norovirus composition contains the anti-norovirus agent and at least one selected from the group consisting of alcohols, surfactants, antimicrobial agents, humectants, and cosmetic fats and oils, and preferably further containing an organic acid, such as citric acid, and/or a salt thereof or vitamin C.

The invention relates to a norovirus real-time fluorescent RT-PCR detection kit and an application thereof. The invention belongs to the field of gene detection. The kit provided by the invention comprises a pair of oligonucleotide primers and an oligonucleotide probe aiming at type I norovirus obtained by screening, and/or a pair of oligonucleotide primers and an oligonucleotide probe aiming at type II norovirus obtained by screening. With a one-step real-time fluorescent RT-PCR, detectable minimal concentration of type I and/or type II norovirus is 1.0*10<2>copies/mL. Therefore, sensitivity and specificity of the kit provided by the invention are both high. With the invention, rapid early-stage detection and quantitative analysis of norovirus in samples such as stools and rectal swabs are realized. With the kit provided by the invention, detection period is short, detection efficiency is high, virus detection specificity is high, accuracy is high, and virus qualitative analysis and quantitative analysis can be carried out simultaneously. The sensitivity of the kit is higher than common PCR and immunological detection methods. The operation is simple, and the kit is easy to popularize. Experiment result repeatability is good.

The invention provides immunogenic formulations comprising virus-like particles (VLPs) from two or more genoclusters and/or strains of norovirus in a pharmaceutically acceptable carrier. In representative embodiments, the formulation also comprises an adjuvant, for example, a viral adjuvant or CpG. The invention also provides methods of inducing an immune response to one or more noroviruses.

The invention provides a primer, a probe and a kit for detecting rotavirus and Norovirus liquid phase chips. The primer comprises three pairs of primers of a specific amplification A type rotavirus sequence, a GI type Norovirus sequence and a GII type Norovirus sequence. The probe comprises three specificity detection probes of A type rotavirus, GI type Norovirus and GII type Norovirus. The kit comprises the three pair of primers and a specificity detection microsphere mixture prepared by coupling the three specificity detection probes and a fluorescence coding microsphere. The experiment proves that the primer and the probe disclosed by the invention are characterized in that a method of combining multiple PCR (polymerase chain reaction) with liquid phase chip detection can simultaneously and accurately detect the A type rotavirus, the GI type Norovirus and the GII type Norovirus. The primer, the probe and the kit have the advantages of strong specificity and high sensitivity.

The invention relates to a primer and a method for detecting GI type and GII type norovirus by utilizing the primer, belonging to the technical field of biological detection. The sequence of the primer is as follows: Nov-F: 5-GTGAATGAWGATGGCGTCKA-3, Nov-R: 5-GTHAGWATCCAGGGGTCAAT-3. The invention focuses on the design of the sequence of the primer, the composition of an RT-PCR (reverse transcription-polymerase chain reaction) system, the selection of reaction conditions and the judgment of reaction results can be performed according to the conventional methods in the field. By adopting the primer and the method provided by the invention, a pair of primers can simultaneously detect and differentiate the GI type and the GII type norovirus in a same reaction tube, thereby not only simplifying the operation steps, but also shortening the detection time.

The invention provides a magnetic nano-enzyme material with peroxidase catalytic activity and a kit for detecting norovirus and an application thereof, and belongs to the technical field of virus detection. The magnetic nano-enzyme material with peroxidase catalytic activity is prepared from ZnFe2O4@ COF and gold nanoparticle raw materials. The invention also provides a magnetic nano-composite enzyme for specifically detecting the norovirus. The magnetic nano-composite enzyme is formed by combining a specific norovirus recognition biological material on gold nanoparticles of the magnetic nano-enzyme material, can specifically recognize and combine the norovirus, and has efficient horseradish peroxidase catalytic activity; and a horseradish peroxidase-labeled secondary antibody in traditional ELISA detection can be completely replaced, and detection of norovirus under non-physiological conditions is realized. The detection kit provided by the invention has the advantages of convenience in detection operation, low cost, high detection throughput and higher use value.

The invention discloses preparation and application of a mouse monoclonal antibody against noroviruses GII.4. Experimental results indicate that the monoclonal antibody has high neutralizing activity for the noroviruses GII.4, does not generate a cross reaction with GI.1 virus-like particles, and can specifically recognize the GII.4 virus-like particles.

It is an object to provide an antiviral agent that can be used for persons having sensitive skin or on the face, inactivates viruses such as a norovirus and an influenza virus, and is excellent in germicidal properties. Further provided is a cleansing agent that does not lead to environmental pollution since the cleansing agent is easily decomposed in the natural environment, scarcely causes eczema and allergic dermatitis since no germicidal agent is added, and has an antiviral performance. The antiviral agent containing a surface-active agent having a C18 unsaturated alkyl group as an active component. It is not always necessary to lather or rinse off with water like cleansing agents such as medicated soaps since the antiviral agent of the present invention at a very low concentration can inactivate the virus.

The invention relates to an enteropathogen rapid detection technology based on real-time nucleic acid sequence-based amplification (NASBA). Specifically, the invention provides a Norovirus real-time isothermal amplification detection kit, and a pair of primers and a molecular beacon probe thereof. The kit includes: a 2*real-time NASBA reaction solution containing the primers and the probe, a 5*enzyme mixed solution and a positive control template, a negative control and a blank control. The sequences of the primers and the probe are the sequences numbered as SEQIDNO:1-3, and the primers and the probe can specifically amplify and detect a Norovirus ORFs1 gene fragment. The kit provided in the invention has the characteristics of fastness, high efficiency, sensitivity and specificity, and real-time detection analysis, etc., and can be used in the fields of conventional detection and disease control and prevention in clinical practice and ports.

The instant disclosure provides norovirus-binding aptamers, compositions comprising such aptamers, and methods of using and producing such aptamers. The aptamers are useful, for example, for detecting the presence of norovirus in test samples, for capturing and/or concentrating norovirus from test samples, for evaluating the efficacy of therapeutic agents in patients diagnosed with a norovirus infection, and for evaluating the efficacy of norovirus vaccines.

The invention discloses a GII.P12/GII.3 recombinant norovirus genome amplification primer and an amplification method. The amplification method comprises the following steps: by taking six pairs of amplification primers as forward and reverse primers of amplification primers respectively, and by taking RNA of GII.P12/GII.3 recombinant norovirus as a template, performing RT-PCR amplification so as to obtain amplification products respectively, performing nucleotide sequencing on the amplification products by using the six amplification primers and two sequencing primers II.12-Seq1R and II.3-Seq6F, and then carrying out jointing and comparison, thereby obtaining full-length sequences of a GII.P12/GII.3 recombinant norovirus genome. For the GII.P12/GII.3 recombinant norovirus which occurs frequently in China, a sectional amplification strategy of '4+1+1'is designed according to three opening reading frames included in the genome, corresponding amplification primers are designed according to conserved regions, the amplification primers are applied to practical detection samples, and GII.P12/GII.3 recombinant norovirus genome sequences can be acquired. The GII.P12/GII.3 recombinant norovirus genome amplification primer and the amplification method can be widely applied to fields such as medical treatment and public health and inspection and quarantine with norovirus detection requirements, and related scientific fields.

The invention aims at providing chimeric protein of enterovirus EV71 neutralization epitope and a human norovirus P structure domain and an establishing method of a chimeric vector. By means of immunoblotting, it is verified that the chimeric protein of the enterovirus EV71 neutralization epitope and the norovirus P structure domain can be used for research and development of detection kits of EV71 and norovirus and novel bivalent subunit vaccines.

The invention relates to a primer combination for detecting infectious diarrhea pathogen. The primer combination comprises at least one combination of the following combinations: a rotavirus primer combination, an enteric adenovirus primer combination, a Norovirus primer combination, a salmonella primer combination, a Shigella primer combination and a campylobacter jejuni primer combination. The invention also relates to a kit containing the primer combination. The kit also comprises a primer-coating micro-fluidic chip, an isothermal amplification reaction liquid, an isothermal amplification enzyme solution, and a negative control. The invention also relates to a detection method by using the above primer combination. The detection method comprises steps as follows: coating of the primer combination, nucleic acid extraction of a sample to be detected, LAMP reaction and result interpretation. The kit provided by the invention can detect infectious diarrhea pathogen rapidly and accurately within one hour, and is also of great significance for rapid assisted guide treatment and drug use. The multi-index detection also can be used in regional epidemiological investigation and epidemic surveillance so as to study epidemic situation of infectious diarrhea in China.