摘要:
Neutralizing antibodies that specifically bind to HIV-1 gpl20 and antigen binding fragments of these antibodies are disclosed. Nucleic acids encoding these antibodies, vectors and host cells are also provided. Methods for detecting HIV using these antibodies are disclosed. In addition, the use of these antibodies, antigen binding fragment, nucleic acids and vectors to prevent and/or treat an HIV infection is disclosed.
摘要:
Antibody VRC01 represents a human immunoglobulin that neutralizes—˜90% of diverse HIV-1 isolates. To understand how such broadly neutralizing HIV-1 antibodies develop and recognize the viral envelope, we used X-ray crystallography and 454 pyrosequencing to characterize additional antibodies from HIV-1-infected individuals. Crystal structures revealed a convergent mode of binding of different antibodies to the same CD4-binding-site epitope. Antibody recognition was achieved through the evolution of complementary contact domains that were generated in diverse ways. Phylogenetic analysis of expressed heavy and light chains determined by deep sequencing revealed a common pathway of antibody heavy chain maturation confined to IGHV1-2*02 lineage that could pair with different light chains. The maturation pathway inferred by antibodyomics reveals that diverse antibodies evolve to a highly affinity-matured state to recognize an invariant viral structure, providing insight into the development and evolution of broadly neutralizing HIV-1 immunity.