The invention provides an antibody or antigen binding fragment thereof capable of binding to the antigen binding pocket of the AP33 antibody, wherein said antibody or antigen binding fragment thereof comprises VL CDR1 (L1), VL CDR2 (L2), and VL CDR.sub.3 (L.sub.3) consisting of the amino acid sequences of SEQ ID NO:1, SEQ ID NO:2 and SEQ ID NO:23 respectively, and comprises VH CDR1 (H1), VH CDR2 (H2), and VH CDR3 (H3) consisting of the amino acid sequences of SEQ ID NO:24, SEQ ID NO:25, and SEQ ID NO:26 respectively. The invention also provides compositions, methods, nucleic acids and uses.

The present invention relates to a recombinant HBV cccDNA comprising HBV genome or the fragment or variant thereof and a site-hybrid insert, a method to generate said recombinant HBV cccDNA, a method for establishment of an in vitro or in vivo cccDNA based model for persistently hepatitis B virus replication by using the recombinant HBV cccDNA of the present invention, and a method for anti-HBV drug evaluation.

Disclosed herein are assays, systems, and kits for the detection and diagnosis of hepatitis virus infections in subjects.

A method for evaluating the therapeutic efficacy of interferon (IFN)/ribavirin (RBV) for hepatitis C is disclosed. The method includes the steps of providing a specimen; mixing the specimen, a primer of a miRNA Let-7g and a poly-chain reaction (PCR) reagent together; and evaluating the efficacy of IFN/RBV on inhibiting a hepatitis C virus according to the expressing level of the miRNA Let-7g in the specimen detected by the PCR reagent.

The present disclosure provides detection methods employing HCV core lipid binding domain and DNA binding domain monoclonal antibodies. In certain embodiments, the lipid binding domain monoclonal antibody recognizes an epitope in amino acids 141 to 161 of HCV core protein.

The present invention relates to a method for detecting a virus, and more particularly, to a method for detecting a virus including a lipid bilayer envelope, wherein the method allows a surface antigen, which is a lipid bilayer envelope protein, to be effectively exposed from lipoproteins that mask all or part of the envelope protein, thereby revealing the surface antigen that is masked by the lipoproteins, so that a probe such as an antibody can be used to detect the virus with high sensitivity within a short time.

The present invention relates to a method for detecting a virus, and more particularly, to a method for detecting a virus including a lipid bilayer envelope, wherein the method allows a surface antigen, which is a lipid bilayer envelope protein, to be effectively exposed from lipoproteins that mask all or part of the envelope protein, thereby revealing the surface antigen that is masked by the lipoproteins, so that a probe such as an antibody can be used to detect the virus with high sensitivity within a short time.

Provided are isolated monoclonal antibodies or any antigen-binding fragment thereof which bind to hepatitis C virus E2 protein (HCV E2). In particular the presently claimed subject matter concerns neutralizing anti HCV E2 antibodies, and their use for treating HCV infection. Furthermore, the presently claimed subject matter concerns methods for preparing neutralizing anti HCV scFv antibodies associated with HCV clearance.

Disclosed is a highly sensitive assay method and assay kit for HBsAg, which do not require treatment with a strong acid or alkali in the sample pretreatment, and which is less susceptible to influences by the autoantibodies. The assay method for hepatitis B virus s antigen in a sample separated from a living body includes: a pretreatment step of mixing a sample with a pretreatment reagent containing a reducing agent, to reduce hepatitis B virus s antigen; and an immunoassay step of subjecting the pretreated sample to an immunoassay of hepatitis B virus s antigen using at least one antibody or antigen-binding fragment thereof capable of antigen-antibody reaction with a reduced peptide composed of the amino acids at positions 98 to 179 of hepatitis B virus s antigen.

Disclosed is a highly sensitive assay method and assay kit for HBsAg, which do not require treatment with a strong acid or alkali in the sample pretreatment, and which is less susceptible to influences by the autoantibodies. The assay method for hepatitis B virus s antigen in a sample separated from a living body includes: a pretreatment step of mixing a sample with a pretreatment reagent containing a reducing agent, to reduce hepatitis B virus s antigen; and an immunoassay step of subjecting the pretreated sample to an immunoassay of hepatitis B virus s antigen using at least one antibody or antigen-binding fragment thereof capable of antigen-antibody reaction with a reduced peptide composed of the amino acids at positions 98 to 179 of hepatitis B virus s antigen.