167 results about "Hepatitis B virus surface Antigen" patented technology

The invention relates to the medicine technical field and concretely relates to a mixture formed by two enantiomorphous eremophilane acids separated from murrey ligularia and the officinal salt as well as the medicine combined material. The enantiomorphous eremophilane acid can be used for preparing the medicine curing hepatitis B virus infectious diseases due to the ability of suppressing the antigenic activity on the surface of hepatitis B virus.

The invention relates to the preparation of brominated flavanonollignan and an application in medicines for treating viral hepatitis B, in particular to a B cyclo-dioxane flavanonollignan compound and a preparation method thereof as well as the application of the compound or pharmaceutically acceptable salts thereof in the preparation of medicines for eliminating hepatitis B surface antigens (HBsAg) and hepatitis B e antigens (HBeAg) and medicines for inhibiting HBV DNA replication. The compound has obvious activity of inhibiting HBsAg and HBeAg, and the intensities of the compound for eliminating HBsAg and HBeAg under the concentration of 20 microgram/millimeter are respectively 2.1 times and 1.2 times larger than the corresponding activity of a positive control medicine alpha-interferon; meanwhile, the compound displays high inhibition ratio more than 57% on HBV DNA at the concentration. The results show that the favonolignan or pharmaceutically acceptable salts thereof can be expected to be used for preparing non-nucleoside type medicines for eliminating HBsAg and HBeAg, inhibiting HBV DNA replication and treating HBV infected diseases.

The invention relates to a use of lignanoid containing benzyloxy flavones in the preparation of drugs for treating viral hepatitis B, in particular to the use of a compound as shown in formula (1) or pharmaceutical salts thereof in the preparation of the drugs for eliminating hepatitis B virus surface antigen and hepatitis B e antigen and the drugs for suppressing HBV DNA replication, and the strength of eliminating HBsAg of flavonol lignanoid under the concentration of 20 mu g/ml is 50.8%, which is 3.2 times of the corresponding activity of a positive control drug; the activity of eliminating the HBeAg under the same concentration is equivalent to 10000 units/ml of alpha-interferon; simultaneously, the flavonol lignanoid shows nearly 60% of suppression rate to HBV DNA under the concentration, which is 1.6 times of the corresponding suppression rate of the alpha-interferon. The results show that the lignanoid containing the flavones or the pharmaceutical salts thereof are expected to be used for preparing the non-nucleoside drugs for eliminating the HBsAg and the HBeAg, suppressing the HBV DNA replication and treating hepatitis B virus infection diseases.

The invention relates to application of ring E iodine substituted silybin in preparing medicaments for treating viral hepatitis B, in particular to application of a compound of a formula (1) and a pharmaceutically acceptable salt thereof in preparing medicaments for clearing away hepatitis B surface antigens (HBsAg) and hepatitis e antigens (HBeAg) and suppressing the HBV (Hepatitis B Virus) DNA replication. The compound has definite activity of suppressing the HBsAg and the HBeAg, and in the presence of a concentration of 100 micrograms/milliliter, the intensities of the compound for clearing away the HBsAg and the HBeAg are respectively 20.0 percent and 29.0 percent which exceed that of a positive control medicament (10,000 units/milliliter of alpha-interferon) by 24 percent and 72 percent. Meanwhile, in the presence of the concentration, the suppression ratio of the compound on the HBV DNA is 32.6 percent which is close to that of the alpha-interferon. Accordingly, the flavone lignan or the pharmaceutically acceptable salt thereof are indicated to be capable of being used for preparing non-nucleoside medicaments for clearing away the HBsAg and the HBeAg, suppressing the HBV DNA replication and treating HBV infection diseases.

The invention relates to application of B-ring ethyoxyl flavanonol in preparing medicaments for treating hepatitis B viruses, in particular to application of a compound as shown in a formula (1) or a medicinal salt thereof in preparing medicaments for clearing away hepatitis B virus surface antigens (HBsAg) and hepatitis B e-antigen (HBeAg) and medicaments for inhibiting the duplication of hepatitis B virus desoxyribonucleic acid (HBV DNA). The compound or the medicinal salt thereof has extremely obvious activity on inhibiting the HBsAg and the HBeAg, and in the presence of a concentration of 20 microgram/milliliter, the intensities for clearing away the HBsAg and the HBeAg of the compound or the medicinal salt thereof are respectively 99.8 percent and 48.5 percent and are 6.2 times and 2.7 times of that of alpha-interferon which is a positive control medicament. More importantly, in the presence of the concentration, the inhibition ratio of the compound or the medicinal salt thereof to the HBV DNA is 64.7 percent, and the activity is 1.7 times of that of the alpha-interferon. Accordingly, the flavone lignan or the medicinal salt thereof can be expected to be used for preparing non-nucleoside medicaments for treating infectious diseases of the hepatitis B viruses.

The invention discloses the medical application of a 15-methylene replaced andrographolide derivant as shown in general formula 1, more particularly relates to the application thereof in preparing anti-hepatitis B virus drugs, pertaining to the pharmaceutical chemistry field. HepG2.2.15 cells are used for detecting the secretory volumes of HBsAg and HBeAg and the HBV DNA level related to viral particles in the supernatant liquid of a nutrient solution, and the result shows that the 15-methylene replaced andrographolide derivant has good in-vitro anti-HBV effect. The 15-methylene replaced andrographolide derivant has better development and application prospect by being applied in preparing drugs used for treating and preventing Hepatitis B.

The invention relates to a mucosal surface antigen which is used to promote and increase in the immune response against co-administered antigens in the formulations out line in the invention. Said novel formulations are obtained from the dual use of the surface antigen as an immunostimulatory agent and, at the same time, as a vaccine antigen. In this way it is possible to obtain multiple formulations of the hepatitis B surface antigen and heterologous antigens, with immunogenicity levels similar to those obtained following parenteral administration and with a reduction in components that can dispense with the use of nasal adjuvants, thereby converting same antigens into elements that can promote an increase in the response to the other co-administered antigens. Said novel use of the hepatitis B virus surface antigen and the resulting antigen formulations can be used in the pharmaceutical industry as therapeutic and preventive vaccine formulations.

This invention relates to a method for separating and purifying recombinant hepatitis B virus surface antigen expressed in Hansenula polymorpha. The method comprises: (1) crushing culture solution of recombinant B virus surface antigen expressed in Hansenula polymorpha till 50-90% cells are crushed; (2) centrifuging to remove cell debris, adjusting pH value and electrical conductivity, performing anion exchange chromatography, and collecting the eluates with activity higher than 20%; (3) incorporating the eluates, adjusting the pH value and electrical conductivity, and performing hydrophobic chromatography; (4) concentrating the eluate with ultrafiltration membrane; (5) separating by a gel filtration column to obtain recombinant B virus surface antigen expressed in Hansenula polymorpha with purity higher than 99%. The method has such advantages as high recovery rate, high product purity, few steps, and short time.

The invention discloses a kit and a method for detecting hepatitis B virus surface antigen (HBsAg). The detection kit is used for marking hepatitis B virus surface antibody (HBsAb) by using metalloporphyrin obtained by using water-soluble A3B type metalloporphyrin to mark the HBsAb. The detection kit and the detection method have the advantages that: (1) free metalloporphyrin molecules are separated from a coupled substance easily after an A3B type metalloporphyrin complex is coupled with the HBsAb to obtain a high-purity labelled antibody, so that non-specific adsorption background signals are reduced when the HBsAg is detected by chemical luminescence immunodetection, and detection sensitivity is greatly improved; (2) the method is simple, convenient and quick; automation is realized easily; and specificity of immunoreaction, high sensitivity of chemical luminescence reaction and stability of a chemical marker are achieved; and (3) a new method is provided for detecting the HBsAg quickly and accurately, and preventing and treating the hepatitis B virus.

The subject invention provides a disease-treating drug that uses hollow protein nanoparticles to specifically act on a target cell or tissue. The present invention allows a protein drug to be effectively capsulated in the particles. The invention also provides a therapeutic method using such a drug. The drug according to the present invention is capable of recognizing a specific cell, such as hepatocytes, and manufactured by fusing a disease-treating substance for a target cell (for example, interferon, hepatocyte growth factor etc.) with hollow nanoparticles of a particle-forming protein (for example, hepatitis B virus surface-antigen protein).

The invention discloses a novel 11-oxo-7, 11-dihydride-6H-benzo [f] pyrido [1, 2-d] [1, 4] azepine-10-carboxylic acid derivative as a hepatitis B virus surface antigen inhibitor, and concretely discloses compounds represented by formula (V) or pharmaceutically acceptable salts thereof, and applications of the compounds represented by formula (V) or pharmaceutically acceptable salt and pharmaceutically acceptable compositions in the treatment of viral hepatitis B.

The present invention is a composition that comprises at least two hepatitis B virus surface antigens (HBsAgs), fragments thereof and/or nucleic acids encoding them, the HBsAgs differing in HBV genotype in the S region and/or pre-S1 region and the composition containing no HBV core antigen (HBcAg) or nucleic acid encoding that antigen. The present invention also includes pharmaceutical compositions, especially vaccines, comprising these compositions for the prevention and/or treatment of an HBV infection or an HBV-mediated disease. The present invention further includes a method of preparing a patient-specific medicament for the therapeutic treatment of hepatitis B.

The subject invention relates to a novel hepatitis B surface antigen mutant and methods of detecting this mutant, and/or antibodies thereto, in patient samples. In particular, the mutant contains a substitution of amino acid threonine for the amino acid alanine at position 123 in the amino acid sequence of the hepatitis B surface antigen (HBsAg) protein.

The medicine for treating hepatitis B is prepared with ten kinds of Chinese medicinal materials including human placenta, fresh-water turtle shell, capillary artemisia, etc. and pig bile. It has the functions of strengthening body's resistance, clearing away toxic matter, dispersing the stagnated liver energy, regulating vital energy, promoting diuresis, regulating and activating body's immunity system, eliminating hepatitis virus, promoting liver cell restoration, etc. It has obvious curative effect on hepatitis B.

The invention discloses a nucleic acid aptamer of a targeted human infectious hepatitis B virus cell and a sequence thereof and belongs to the fields of gene engineering and biological medicine. According to the invention, a novel combining chemical technology SELEX is utilized to screen out an RNA aptamer capable of specifically binding to a hepatitis B virus surface antigen from single chain RNA random library by using the hepatitis B virus surface antigen as a target protein. The RNA aptamer has a sequence of 5'-GUUGAUUGCGUGUCAAUCAUGGCCGUCUAUAAUGAUCGUAAACGACGGGUCAUGUGUAUGUUGGGGAUUGGGACCUGAUUGAGUUCAGCCCACAUAC-3', can form a special loop structure in a random sequence area thereof and combine with the hepatitis B virus surface antigen singularly and with high affinity or combine to hepatocyte infected by the hepatitis B virus by target bonding. The RNA aptamer provides a specific efficient mark molecule for hepatitis B diagnosis and treatment and also provides a new option for exploiting diagnostic reagent and treatment medicament for chronic hepatitis B.

The invention discloses a human anti-HBV surface antigen genetic engineering antibody, and a preparation method and application thereof. According to the invention, the phage surface display technology is adopted, peripheral blood lymphocyte of person having high titer surface-antibody after immunization of hepatitis B vaccine is collected is obtained, a human anti-HBV surface antigen genetic engineering antibody library is established through a genetic engineering means, and a Fab section of the specific anti-HBV surface antigen genetic engineering antibody is obtained through screening. The obtained Fab section of the antibody is named to be HBFab21. The amino acid sequence of a light chain variable region of the HBFab21 is shown in SEQ ID No.1, and the amino acid sequence of a heavy chain variable region of the HBFab21 is shown in SEQ ID No.2. According to the invention, a foundation for hepatitis B virus infection prevention and researches on treatment to hepatitis B virus is laid; through the foundation, an antibody product having an effect of neutralizing hepatitis B virus infection is obtained, and can be applied to preparation of a clinical drug or diagnostic reagent for liver diseases relating to hepatitis B virus.

The invention relates to an integrated detection reaction orifice plate and protein chip reagent box for detecting six indexes of diagnosis, forecast and prognosis of hepatitis, hepatocirrhosis and liver cancer, including hepatitis B virus surface antigen (HBsAg), hepatitis C virus antibody (HCVAb), alpha-fetoprotein (AFP), alpha-L-Fucosidase (AFU), mono amine oxidase (MAO), hyaluronic acid (HA). And the orifice plate comprises a substrate and reaction orifices on the substrate, where the reaction orifices comprise 2-384 sample orifices and 2-8 standard product orifices, and at the bottom of each reaction orifice is solid carrier coated with micro lattice of HBsAg, HCVAg, AFP, AFU,MAO,and HA antigens /antibodies or more. And the reaction plate and reagent can simply and conveniently, quickly and accurately implement simultaneous detection of the six indexes of diagnosis, forecast and prognosis of hepatitis, hepatocirrhosis and liver cancer for many persons.

A hepatitis B surface antigen is produced with beer yeast engineering bacteria. The process is carried out by: 1) fermenting seeds of the beer yeast engineering bacteria, 2) fermenting by the said seeds, and 3) separating and purifying fermented mixture to obtain hepatitis B surface antigen, specially, flow adding adenine, adenosine, adenosine monophosphate, adenosine diphosphate or adenosine triphosphate at the rate of 14mg/L.h by weight into its culture medium in the said step 2. It achieves in higher expression level of recombined HBsAg.