丙型肝炎病毒与人IgG Fc片段的特异性结合

Specific Binding of Hepatitis C Virus to the Fc Fragment of IgG Molecules

使用亲和捕获PCR法研究丙型肝炎病毒（HCV）和人IgG的相互作用，发现HCV能与IgG及完整的IgGFc片段结合，但不与Fab片段结合。这种结合可以被Fc片段所竞争抑制，而不能被Fab片段所抑制。HCVRNA阴性血浆不能阻断Fc片段与HCV的结合，推测这是一种HCV颗粒与IgGFc片段之间的特异性结合。本研究揭示了HCV与IgG之间的相互作用，探讨了HCV引起免疫复合物疾病的机理及丙型肝炎的慢性化倾向。

Affinity- capture PCR method was adapted to study the interaction between hepatitis C virus (HCV) and human IgG, and demonstrated that HCV bound IgG and Fc fragment but not Fab fragment, The binding could be inhibited cometitively by Fc fragment but not Fab fragment. Meanwhile, pre -mccubation with HCV - RNA negative plapa did not inhibit subsequent binding of HCV to Fc fragment, further confirmed that this binding is just between HCV particles and Fc fragment, The results demonstrated an interaction betwee HCV and IgG, and gave a new explanaion by which HCV may trigger immune complex disease and the chronic trend of hepatitis C.