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    • 7. 发明公开
    • AN ANTIBODY COMPOSITION FOR PREVENTION OR TREATMENT OF MUTANT HEPATITIS B VIRUS INFECTION
    • 用于预防或治疗突变型乙型肝炎病毒感染的抗体组合物
    • EP2858674A1
    • 2015-04-15
    • EP13817251.5
    • 2013-07-08
    • Green Cross Corporation
    • KIM, Se-HoHONG, Kwang-WonSHIN, Wong-WonCHANG, Ki Hwan
    • A61K39/395A61P31/12A61K38/21
    • C07K16/082A61K38/21A61K39/42A61K45/06A61K2039/505C07K16/40C07K2317/34C07K2317/76A61K2300/00
    • The present invention provides an antibody that binds to the surface antigen (HBsAg) of hepatitis B virus (HBV) to neutralize the hepatitis B virus. The surface antigen-binding site of the antibody was found to play a very important role in viral replication, and when a mutation in the site occurs, viral replication is significantly inhibited, and thus at least HBV virus cannot cause a mutation in the site. In the present invention, it was confirmed by the use of patient-derived virus that the antibody of the present invention binds to either YMDD mutant hepatitis B virus, produced by conventional viral replication inhibitors, or G145R HBsAg mutants to which plasma-derived HBIG (hepatitis B immunoglobulin) does not bind. In addition, the in vivo effect of the antibody of the present invention was examined using chimpanzees which are unique animal models for hepatitis B virus. As a result, it was found that the antibody has the effect of neutralizing even wild-type hepatitis B virus in the in vivo model. Thus, it can be seen that the antibody of the present invention has the ability to bind not only to wild-type hepatitis B virus, but also mutant hepatitis B viruses having a polymerase YMDD mutant and a surface antigen G145R mutation, as well as various mutant viruses derived from patients. Thus, the antibody of the present invention can be effectively used for the prevention or treatment of infections with not only wild-type hepatitis B virus, but also mutant hepatitis B viruses.
    • 本发明提供了与乙型肝炎病毒(HBV)的表面抗原(HBsAg)结合以中和乙型肝炎病毒的抗体。 发现抗体的表面抗原结合位点在病毒复制中起非常重要的作用,并且当该位点发生突变时,病毒复制被显着抑制,因此至少HBV病毒不能引起位点突变。 在本发明中,通过使用来自患者的病毒证实,本发明的抗体结合由常规病毒复制抑制剂产生的YMDD突变乙型肝炎病毒或来自血浆来源的HBIG(G145R)的HBsAg突变体 乙型肝炎免疫球蛋白)不结合。 另外,使用作为乙型肝炎病毒独特动物模型的黑猩猩检查了本发明抗体的体内作用。 结果发现该抗体在体内模型中甚至具有中和野生型乙型肝炎病毒的作用。 因此,可以看出,本发明的抗体不仅能够结合野生型乙型肝炎病毒,而且能够结合具有聚合酶YMDD突变体和表面抗原G145R突变的突变乙型肝炎病毒以及各种 来自患者的突变病毒。 因此,本发明的抗体不仅可以有效用于预防或治疗感染野生型乙型肝炎病毒,而且可以用于突变乙型肝炎病毒感染。