35 results about "Hepatitis B Antigens" patented technology

The invention relates to a diagnosing reagent for hepatitis B, disclosing detection grains for e antigens of the hepatitis B virus, which are of the luminous grains coated by anti-HBE antibodies. The invention also discloses preparation and application for the detection grains for e antigens of the hepatitis B virus; moreover, the invention further discloses an outside-body diagnosis reagent box for detecting e antigens of the hepatitis B in a blood serum sample of human beings as well as a method for utilizing the light excitation chemiluminescence principle to quantitatively and qualitatively detect e antigens of the hepatitis B virus. The reagent box of the invention can be jointly used to diagnose the individual acute or chronic hepatitis B together with other blood serums and clinic information, and screen the hepatitis B for women in the perinatal period so as to judge the risk of newborn babies contaminating the hepatitis B.

The invention discloses an application of forsythiaside A in preparing a hepatitis B therapeutic drug. An anti-hepatitis B virus test in vitro of the forsythiaside A shows that the forsythiaside A can effectively inhibit hepatitis B antigen and hepatitis B viruses, which is characterized by the following aspects: using a HepG2.2.2.15 cell model, TC50 cytotoxicity of the forsythiaside A in vitro is equal to 739mu g/mL; IC50 of inhabitation on S antigen is equal to 149.4mu g/mL; IC50 of inhabitation on e antigen is equal to 139.6mu g/mL; and IC50 of inhabitation on a cell HBV-DNA is equal to 56.3mu g/mL.

The invention provides a multivalent immunogenic composition containing enterovirus antigens. The composition comprises inactivated EV71 antigens and/or inactivated CA16 antigens, and inactivated polio antigens. The composition can further comprise antigens selected from hepatitis A antigens, hepatitis B antigens, acellular pertussis antigens, tetanus toxoid, diphtheria toxoid, Haemophilus influenzae type b capsular polysaccharide, and meningococcal polysaccharide antigens, as well as physiologically acceptable carriers combined with bacterial polysaccharide antigens. The invention also provides a preparation method of the composition. The composition can prevent invasion of a plurality of pathogens simultaneously without interference among the antigens, and the immunogenicity is no less than that of individually activated antigens. With the composition, vaccination processes are significantly simplified, and the vaccination efficiency is improved with reduced costs.

The invention provides an anti-HBV medicine combination which has more remarkable treatment effect and safety and no toxic and side effect and can evidently increase the negative conversion ratio of HBSAg. The invention takes HepG2.2.15 as a target cell and adds lamivudinevir, protocatechuic acid and the compatibility preparation of lamivudinevir and protocatechuic acid with a proper concentration to cell culturing medium. The cell is cultured by a regular method and HBsAg and HBeAg secreted by the cell is detected by ELISA method, HBV DNA content is measured by fluorescent quantitation PCR, HBV resistance effect of the drug is judged by depression rate calculation method to determine the medical treatment effect on HBV and the preparation proportion of medicine combination. The proportion of lamivudinevir to protocatechuic acid is between 1 to 50 and 1 to 100 (mass ratio) and generally the dosage of lamivudinevir is 0.05-5Mug and the protocatechuic acid is 5-500 Mug. The medicine combination can evidently improve the depression effect of the lamivudinevir on Hepatitis B antigen and reduce the toxic and side effect of the lamivudinevir when being used separately.

The present invention relates to a method for the production of a hepatitis B antigen suitable for use in a vaccine, the method comprising purification of the antigen in the presence of cysteine, to vaccines comprising such antigens.

The present invention discloses a hepatitis B virus e antigen detection kit, which comprises a hepatitis B e antigen calibration substance, an anti-HBe monoclonal antibody coated plate, europium labeled anti-HBe monoclonal antibody, an assay buffer liquid, a fluorescence enhanced liquid and a concentrated washing liquid. The present invention further discloses a preparation method of the kit, and a method for detecting hepatitis B virus e antigen by using the kit. According to the present invention, the kit has advantages of high detection sensitivity, good specificity, simple operation, no pollution, and low cost, can be used for quantitative detection of the HBeAg content in human serum/plasma, and provides precise reference for the clinical hepatitis B individualized management treatment program.

The invention discloses a replicon DNA (Deoxyribonucleic Acid) vaccine for treating chronic hepatitis B. The replicon DNA vaccine is a recombinant replicon DNA vaccine vector plasmid carrying a composite hepatitis B antigen gene. The composite hepatitis B antigen gene is named as HBV-CS, the nucleotide sequence of the composite hepatitis B antigen gene is shown as the sequence 1 in a sequence table; a vector of the replicon DNA vaccine is named as pSVK. The recombinant replicon DNA vaccine vector plasmid which sequentially carries a fusion gene FL-CS, a human IgGFc-segment gene, a GPI gene and a GM-CSF gene and a B7.1 gene from upstream to downstream and is constructed by using the pSVK as a starting gene is named as pSVK-HBVA, and the nucleotide sequence of the recombinant replicon DNA vaccine vector plasmid is shown as the sequence 7 in the sequence table.

A thermosensitive hepatitis B vaccine is provided. The thermosensitive hepatitis B vaccine includes an aqueous phase solution comprising a biodegradable thermosensitive hydrogel copolymer; at least one antigen of hepatitis B virus (HBsAg); and at least one bioactive substance. The thermosensitive hepatitis B vaccine of the disclosure is particularly suitable for being applied in the patients, which are low responsive or non-responsive to conventional hepatitis B vaccine, for enhancing the induction of cell-mediated immune responses and overcoming the HBsAg non-responsiveness.

The invention provides an immunogenic composition and belongs to the technical field of preparation of biological products. The immunogenic composition contains an inactivated poliomyelitis antigen and a type b haemophilus influenzae proteoglycan protein conjugate. The immunogenic composition can further contain a hepatitis b antigen and a physiologically acceptable carrier. The invention further provides a preparation method of the immunogenic composition. The immunogenic composition provided by the invention can be used for preventing infection of a plurality of types of pathogens at the same time; the antigens do not have a mutual interference phenomenon; the corresponding immunogenicity is not reduced when being compared with the immunogenicity excited by a single antigen; when the immunogenic composition provided by the invention is used, a vaccine inoculation program can be remarkably simplified, the inoculation efficiency is improved and the cost is reduced.

Compositions including a CD180 binding ligand and a linked Hepatitis B antigen and their use are disclosed. The Hepatitis B antigen includes Hepatitis B virus pre-S1 and/or pre-S2 region of the HBV envelope protein (HBVpreS1/S2Ag), L-HBsAg, MHBsAg, S-HBsAg, or antigenic fragments or mutants thereof.

The invention discloses a method for building a hepatitis B e-antigen negative mouse model. The method comprises the following steps: 1) extracting serum DNA of a patient diagnosed with HBeAg negative HBV infection, and carrying out PCR amplification by using a primer pair HBV-F/HBV-R; 2) sequencing a PCR product, and redesigning a specific PCR amplification primer pair to the sequence for PCR amplification; 3) cloning the PCR product to a pEASY-Blunt Zero carrier; 4) extracting plasmids, carrying out enzyme digestion, recovering and purifying fragments, and carrying out cyclization and purification to obtain HBVe negative cccDNA; and 5) injecting the cccDNA into a mouse, thereby building the hepatitis B e-antigen negative mouse model. According to the invention, the hepatitis B e-antigen negative mouse model is successfully built for the first time, which is highly significant for study on the mechanism of the HBeAg negative hepatitis infection and study on medication effects.

The invention discloses a reagent for hepatitis B virus antibody in-vitro diagnosis, the reagent comprises a solid phase antigen, an enzyme-labeled antigen and a chromogenic substrate, the solid phase antigen comprises a solid phase carrier and an antigen coated on the surface of the solid phase carrier, the enzyme-labeled antigen comprises an enzyme for labeling the antigen and an enzyme-labeled antigen, the antigen is hepatitis B antigen recombinant protein, the antigens in the solid-phase antigen and the enzyme-labeled antigen are the same hepatitis B antigen recombinant protein, the solid-phase carrier comprises magnetic microspheres, the enzyme comprises horse radish peroxidase, and the chromogenic substrate comprises TMB. The invention also discloses a method for preparing the reagent and a method for identifying the hepatitis B virus antibody by using the reagent. The reagent is used for detecting the hepatitis B virus antibody, has the advantages of good specificity, high sensitivity, accurate result, good repeatability and strong clinical applicability, and can accurately reflect the content index of the hepatitis B virus antibody in a human body.

The invention belongs to the technical field of medical instruments, and particularly discloses a preparation method of a hepatitis B antibody fragment, the hepatitis B antibody fragment, a kit and an application, wherein the preparation method comprises the following steps: adding pepsin, dithioerythritol and 2-mercaptoethanol into a hepatitis B antibody solution, and incubating for the first time; and adding glycine, and purifying after secondary incubation. The preparation method at least has one of the following beneficial effects: when the hepatitis B antibody fragment prepared by the preparation method of the hepatitis B antibody fragment provided by the invention is applied to detection of hepatitis B antigen, the generation of false positive can be remarkably reduced, so that the accuracy of a detection result is improved.

The invention belongs to the technical field of medicines, and relates to a compound aiming at hepatitis B virus surface antigen (HBsAg), in particular to a leonurine hydrochloride (Leonurine) (CAS: 24697-74-3) aiming at hepatitis B virus surface antigen (HBsAg). The compound is a monomer extracted and chemically synthesized from traditional Chinese medicine motherwort, and tests show that the compound can effectively reduce the HBsAg in vitro supernatant and has an effect on reducing the hepatitis B e antigen (HBeAg) in vitro supernatant. The compound leonurine can be used for targeted reduction of extracellular HBsAg and HBeAg, and provides support for research and development of therapeutic drugs and methods for effective reduction of HBsAg and HBeAg in HBV persistent infection.

The present invention relates to a hepatitis B vaccine composition for nasal mucosa spraying administration, characterized by comprising a hepatitis B antigen and a gel base containing a carboxyl vinyl polymer, and by being applicable to hepatitis B prevention and treatment.

The invention relates to medicinal use of liposomes for the treatment of chronic viral hepatitis B, wherein said liposomes are prepared from phospholipid and cholesterol. This invention further relates to uses of said liposomes for the manufacture of medicaments for promoting the seroconversion of Hepatitis B e antibody to positive and the seroconversion of Hepatitis B e antigen to negative in patients with chronic viral hepatitis B, for reducing the hepatitis B virus titer in the peripheral blood serum of patients with chronic viral hepatitis B, for reducing the concentration of glutamic-pyruvic transaminase in the peripheral blood serum of patients with chronic viral hepatitis B, and for maintaining the stability of the T cell receptor repertoire in patients with chronic viral hepatitis B.