title: Temporal analysis of HIV envelope sequence evolution and antibody escape in a subtype A-infected individual with a broad neutralizing antibody response.
abstract: The origin of broadly neutralizing HIV-specific antibodies and their relation to HIV evolution are not well defined. Here we examined virus evolution and neutralizing antibody escape in a subtype A infected individual with a broad, cross subtype, antibody response. The majority of envelope variants isolated over the first approximately 5 years after infection were poorly neutralized by contemporaneous plasma that neutralized variants from earlier in infection, consistent with a dynamic process of escape. The majority of variants could be neutralized by later plasma, suggesting these evolving variants may have contributed to the elicitation of new antibody responses. However, some variants from later in infection were recognized by plasma from earlier in infection, including one notably neutralization-sensitive variant that was sensitive due to a proline at position 199 in V2. These studies suggest a complex pattern of virus evolution in this individual with a broad NAb response, including persistence of neutralization-sensitive viruses.
authors.affiliation: Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA.
authors.forename: Katherine A
authors.initials: KA
authors.lastname: Bosch
authors.forename: Stephanie
authors.initials: S
authors.lastname: Rainwater
authors.forename: Walter
authors.initials: W
authors.lastname: Jaoko
authors.forename: Julie
authors.initials: J
authors.lastname: Overbaugh
mesh_terms: D000328:Adult; D000595:Amino Acid Sequence; D057134:Antibodies, Neutralizing; D003001:Cloning, Molecular; D005260:Female; D015967:Gene Expression Regulation, Viral; D015483:HIV Antibodies; D015700:HIV Envelope Protein gp41 / Q000235:genetics* / Q000276:immunology / Q000378:metabolism; D015658:HIV Infections / Q000276:immunology* / Q000821:virology*; D015497:HIV-1 / Q000145:classification*; D006801:Humans; D010802:Phylogeny
chemical_list: D057134:Antibodies, Neutralizing; D015483:HIV Antibodies; D015700:HIV Envelope Protein gp41