Construction of a recombinant full-length membrane associated IgG library

HIV/AIDS has become a global pandemic. Development of an effective HIV-1 vaccine eliciting broadly neutralizing monoclonal antibodies (bnmAbs) remains a big challenge. Before an effective vaccine comes out, passive treatment for prevention and protection of HIV-1 infection may alleviate the burden caused by the pandemic. Numerous bnmAbs have been isolated against different epitopes in HIV-1 envelope glycoprotein via phage/yeast display, EBV-immortalization, single cell sorting and micro neutralization. Recombinant antibody library with extended diversity and enlarged size of units are applicable by phage/yeast display and mammalian cell display for monoclonal antibody isolation. Here, we constructed an immune recombinant membrane associated full length IgGs library based on mammalian cell display system. This library can be used for monoclonal antibody screening/isolation by target cell sorting. A full length antibody mz2F11 was screened with potent neutralizing activities against a panel of viruses tested. Our study provides a novel way of antibody library construction and monoclonal antibody screening. Antibodies screened via this method can help broaden the knowledge in passive treatment and prevention against HIV-1 infection.