152 results about "Eb virus" patented technology

The present invention provides one kind of gene, recombinant plasmid and polypeptide of EB virus resisting tumor polypeptide. The coding inducing polypeptide gene and coliform group gene are connected via operation to obtain polynucleotide sequence expressing recombinant antitumor polypeptide. The nucleotide sequence of the coding inducing polypeptide is inserted into coliform group gene by means of double strand oligomeric nucleotide point mutation technology to form the said recombinant plasmid. The obtained recombinant plasmid is transfected into engineering colibacillus TG1 to obtain engineering bacillus cell capable of generating recombinant antitumor polypeptide; and through mass proliferation, centrifugal precipitation and other steps, recombinant antitumor polypeptide is obtained. The antitumor polypeptide has specific targeting property, high efficiency of killing solid tumor, no attack to health cell, low toxicity and less negative reaction.

A method for preparing EB viral protein enzyme-linked immunosorbent diagnostic kit includes selectng EBNAl (BKRF1) prote, Zta (BZLF1) protein and VCA-p18 protin in EB viral protein for diagnosing nasopharyngeal carcinoma of serodiagnosis as target antigen for detecting antibody level in blood serum, using glutathione-transferase gene fusion system to carry on clone, presentation and purification of EB viral protein for creating diagnostic kit.

The invention discloses a recombinant plasmid relevant to the EB virus characteristic TCR gene and a method for reverting normal T cell to obtain the anti-EBV characteristic CTL. The recombinant plasmid consists of TCRV Alpha 15 gene, pIRES vector and TCR V Beta 1gene; the TCRV Alpha 15-p-IRES-TCR V V Alpha 1gene recombinant plasmid relevant to the clone of EB virus characteristic cell toxin T cell of the invention is delivered to the peripheral blood T cell to obtain a large number of high-efficiency cell toxin T cells of the antigen relevant to the characteristic EV virus; in this way, the cell of EBV<+> can be killed on purpose and the safety property is high; therefore, the invention has comparatively good prospects for curing diseases relevant to the EB virus.

The invention discloses compounds having virus resistance and a composition thereof. The composition comprises one or more of the 13 compounds comprising 6'-O-caffeoyl deacetyl asperulosidic acid methyl ester. The compounds having virus resistance and the composition thereof can be extracted from plants and can also be prepared by synthesis. The composition comprising the compounds having virus resistance can prevent and treat viral infection-caused diseases such as influenza, myocarditis, conjunctivitis, viral pneumonia, encephalitis, leukemia, hepatitis B, hepatitis C, AIDS, genitourinary system infection, EB virus infection, human papillomavirus infection and cytomegalovirus infection. The composition can be prepared into an oral preparation, an injection, a spray, a subcutaneous injection and an anus suppository.

The invention provides an identification method of an EB virus infected lymphocyte subpopulation and an application thereof and relates to the technical field of medical detection. The identification method of the EB virus infected lymphocyte subpopulation provided by the invention can accurately position the cell type of EBV infection by sorting monocytes of peripheral blood of an EBV infected patient in combination with a flow cytometry and a real-time fluorescent quantitative PCR technology, and is helpful for a clinician to formulate a therapeutic regimen for the cell type with EBV infection so as to efficiently and accurately treat diseases caused by EBV infection. In addition, by applying the identification method provided by the invention, target cells infected with EBV can be determined, preparation of related therapeutic drugs can be guided, and the targeted drugs are prepared with a clear target.

The invention discloses a method for detecting infectious disease pathogens possibly existing in a biological sample. The infectious disease pathogens comprise EB virus, herpes simplex virus, cytomegalic inclusion disease virus and adenovirus. The method comprises the following steps: expanding nucleic acid fragments of the biological sample, and detecting the nucleic acid fragments by using a probe. The invention also provides primers used for expanding and the probe used for detection. The invention also provides a kit comprising the primers. The method has the advantages of high sensitivity, strong specificity, simple operation and wide sample range, can simultaneously detect various infectious disease pathogens, and is suitable for early diagnosis of respiratory infectious diseases.

The invention provides a chemiluminescence kit for detecting EB virus Rta/IgG antibody and a use thereof and belongs to the fields of biotechnology, medical immunology and external serology diagnosis. The chemiluminescence kit comprises magnetic particles coated with an anti-His label monoclonal antibody, a Rta protein with a His label, a specific synthetic polypeptide with a His label and an acridinium ester-labeled anti-human IgG antibody. The specific synthetic polypeptide has an amino acid sequence shown in the formula of SEQ ID NO: 1. The invention also provides a method for detecting an EB virus Rta/IgG antibody by the chemiluminescence kit. The chemiluminescence kit and the detection method can realize fast, accurate, efficient, sensitive and specific detection of an EB virus Rta protein antibody in a sample to be detected, realize multiple sample treatment, shorten detection time and improve detection efficiency.

The invention relates to a kit checking EB virus with mediated isothermal amplification technology, and belongs to biological checking agent field. The kit comprises a set of primer, DNA polyase, reacting liquid, cracking liquid (1) and (2), coloured solution and positive contrast liquid; said a set of promer comprises two pair of primers, and the squence is: outer primer1: GCATGTTTGAGTCCCGCTG, outer primer 2: CCATTGCTGTGGAAGTGGC;inner primer 1: CACCCAACAAGGCAGGACGCTTTTGCTGAACATTAGCATCCCGG; inner primer2: GTGCCTGGGCCTGCAATTTACTTTTGCGATCTGGTGGGCATTC, or outer primer 1: TCAACAGATAATCCACCCGC, outer primer 2: TAGTAAATTGCAGGCCCAGG; inner primer 1: TCAAACATGCCAGAGGCGTTGGTTTTTGGCGTGGAAGTTAATGTCC; inner primer 2: GCGACCACCAGCTCTGTCATTTTTGAGCCTTGCACCCAACAAG. The kit needs no special agent and device, can fast detect EB virus in the sample, and is characterized by high speciality, high sensitivity, simple determination method and high correcting rate.

The invention provides a kit for genotyping VZV (Varicella-Zoster Viruses). The kit is characterized by comprising a nucleotide sequence shown as the Table 3 in the specification, and specific primers and specific probes corresponding to clade1-5 type VZV of chemical structures. The kit has the function of detecting various kinds of VZV DNA (Deoxyribonucleic Acid); the detection sensitivity is 10<2> copies/reaction; no cross reaction with human genome, herpes simplex viruses type I/type II, cytomegaloviruses and EB viruses exists; and the kit is applicable to the virus gene diagnosis of clinical VZV infected persons, and can also be used for the epidemiology survey of different Clade types of VZV.

This invention relates to how to diagnose NPC. It shows the use of LMP2A-the membrane protein infected by recombined EBV in NPC diagnoses. It uses LMP2A as antigen, and detect serum sample by ELISA method. If the result is greater than the critical value, it is light demanding. This invention can be used to the early diagnoses of NPC, it is quick and convenient.

The invention discloses a CBA kit used for detecting anti-EB virus gp78 antibody, which includes coupling superbead, the superbead is made by coupling blank superbead and NeutrAvidin in a coupling way, the NeutrAvidin binds with the bioepiderm labeled EB virus gp78 antigen which is coupled with Biotin. The gp78 antibody CBA kit is suitable for crown screening, evaluation of the high incidence of nasopharyngeal carcinoma, diagnose and prognosis effect appraisal, observation, furthermore, the kit can be applied directly in nasopharyngeal carcinoma early diagnosis, judge prognosis of patients, etc. with the characteristics of rapid, objectivity and accurate.

The invention provides a recombinant protein vaccine. The recombinant protein vaccine contains an epitope of EB virus antigen 1 (EBNA1) and an epitope of human herpes virus glycoprotein; fusion proteins can effectively activate a specific cell toxic T lymphocyte (CTL) reaction, directly restrain the expression EBNA1, and give play to treatment effects on EB virus-associated tumors; an immunosuppression path can be directly blocked through herpes virus glycoprotein, and the activity of regulatory T cells is improved. In this way, by means of the recombinant protein vaccine, EB virus infections and diseases related to the EB virus infections and tumors related to the EB virus infections can be prevented or treated in a multi-way manner more comprehensively. The invention further provides a recombinant expression vector containing genes for coding the recombinant protein vaccine and application of the recombinant protein vaccine.

The invention provides a preparation method of recombinant adeno-associated viruses containing EB virus latent membrane protein 1 and 2 genes and application thereof. The recombinant adeno-associated viruses of the invention carry DNA sequences of encoding EB virus latent membrane protein 1 and 2 as shown in CCTCC NO: V200907, wherein the virus titer of the recombinant adeno-associated viruses is not smaller than 1*10<11>/ml viral particles. The recombinant adeno-associated viruses can induce the EB virus specific cell cytotoxic lymphocyte reaction in vivo. The preparation method of the invention comprises the following steps: 1) cloning DNA sequences for encoding the proteins LMP1, LMP2 and HSP70 to proper adeno-associated virus carrier plasmids to obtain recombinant adeno-associated virus carrier plasmids containing the DNA encoding sequences of LMP1, LMP2 and HSP70; and 2) using the recombinant adeno-associated virus carrier plasmids in the first step and auxiliary plasmids for cotransfecting proper incasing cells to obtain required recombinant adeno-associated viruses.

A miniature polypeptide resisting to EB virus tumor, its gene and its recombinant plasmid are disclosed. Its preparing process includes linking the gene for coding and leading peptide with the plasmid carrying the colicin ion channel structure domain gene, transferring engineering bacteria for amplifying, and separating and purifying by His-tag column. It can be used to kill tumor cells.

The invention relates to a Chinese hamster ovary (CHO) cell line capable of showing Rta albumen of Elzatein-Barn (EB) virus stably and efficiently, a creation method and application thereof and a cell base built by the CHO cell line, and belongs to the technical field of biology. Preservation number of the recombination cell line CHO/RTA is CGMCC6955, the CHO cell base expressing the Rta albumen of the EB virus can be used for practical production and formed by the recombination cell line CHO/RTA. The invention further provides a method for creating the CHO cell line. Dihydrofolate reductase defect type Chinese hamster ovary cells (CHO/dhfr-) serve as host cells, and the cell line capable of expressing the Rta albumen of the EB virus stably and efficiently is obtained after screening and amplification of the host cells.

(PROBLEM) To establish a system enabling modification and proliferation of EB virus circular DNA in Escherichia coli and large-scale production of recombinant EB virus virions in the cells.

(Means for Resolution) The present invention enables modification and proliferation of a circular EB virus genome derived from Akata cells in Escherichia coli by inserting a DNA sequence of a bacterial artificial chromosome (BAC) into a circular EB virus DNA in Akata cells via homologous recombination. The recombinant EB virus can be produced in a large quantity by introducing the resulting genomic DNA into Akata cells.

The invention discloses a kit for detecting an EB viral capsid antigen (VCA) IgA antibody. The kit comprises a magnetic particle suspension taking a VCA gene recombinant antigen fragment as a coatingantigen, an anti-human IgA monoclonal antibody enzyme conjugate marked by horse radish peroxidase, a sample diluent and a chemiluminescent substrate solution. Magnetic particles are adopted as a solid-phase carrier of the antibody, and a chemiluminescence immunoassay technology is utilized, so that single-person random, rapid and automatic detection can be realized on a full-automatic chemiluminescence analyzer. Due to the fact that an indirect method is adopted in the technical principle, a plurality of dominant antigen fragments most valuable to previous infection and recent infection are selected from more than 30 EB virus target antigen proteins, and the problem that specificity and sensitivity are affected due to incomplete sites of conventional kits on the market is solved. The kit is suitable for the qualitative detection of the EB VCA IgA antibody in a human serum or plasma sample, and assists the clinical diagnosis of nasopharyngeal carcinoma.

The invention provides a nucleic acid aptamer detection kit for EB virus and HCMV, and also provides a preparation method and application of the kit. The kit has the characteristics of simplicity in operation, quick response, high accuracy and high sensitivity during detection, and can be combined with detection devices such as a microplate reader, a flow cytometry and a fluorescence microscope torealize accurate detection of the two viruses. The kit is relatively high in sensitivity, good in specificity, wide in measurement range and simple to operate, can be used for simultaneously detecting two viruses, and has a good market prospect.

The invention relates to preparation and application of multi-epitope recombinant protein of epstein-barr (EB) virus latent membrane protein 2. The invention discloses the multi-epitope recombinant protein rich in a plurality of CTL epitopes, Th epitopes and B cell epitopes obtained by screening based on the full-length EB virus latent membrane protein 2. The invention also discloses the coding nucleic acid of the protein, and comprises a nucleic acid recombinant vector and a host cell. The invention also discloses the application of the protein in the aspects of preventing, treating and diagnosing EB virus infection and related disease thereof. The protein of the invention has very strong immunogenicity and antigenicity and good application prospect.

The invention relates to the compounds and their salts of type (I), among them R1 and R2 can be the same or different, R1 is the amino acid residue, alkoxyl formyl, organic acid acyl, phosphoryl and alkyl. R2 is H, amino acid residues, alkyloxyethyl formyl, organic carboxylic acid acyl, phosphoryl, and alkyl. These compounds have the function of anti - hepatitis B virus (HBV), anti-EB virus (EBV) and anti - hepatitis D virus (HDV) role. The invention also covers the preparation methods and compounds in the preparation of antiviral drugs.

The invention discloses a chimeric particle containing dominant epitope peptide of an EB virus membrane surface glycoprotein gp350 and a coding gene and application of the chimeric particle. Accordingto the chimeric particle and the coding gene and application thereof, it is found for the first time that the immunogenicity of polypeptide epitopes can be significantly improved by combining a plurality of dominant epitopes in a certain sequence and then conducting granulation display, immunized mice show that the total anti-titer of induced serum, the titer of neutralizing antibodies in the serum, and the efficiency of the serum in blocking viral infection at the cellular level are significantly improved. The invention provides a candidate vaccine form which can be used for developing and preventing EB virus infection, and important practical and theoretical significance and application prospects for prevention of EB virus-related diseases are achieved.