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Highly complex neutralization determinants on a monophyletic lineage of newly transmitted subtype C HIV-1 Env clones from India.

Abstract：

:Little is known about the neutralization properties of HIV-1 in India to optimally design and test vaccines. For this reason, a functional Env clone was obtained from each of ten newly acquired, heterosexually transmitted HIV-1 infections in Pune, Maharashtra. These clones formed a phylogenetically distinct genetic lineage within subtype C. As Env-pseudotyped viruses the clones were mostly resistant to IgG1b12, 2G12 and 2F5 but all were sensitive to 4E10. When compared to a large multi-subtype panel of Env-pseudotyped viruses (subtypes B, C and CRF02_AG) in neutralization assays with a multi-subtype panel of HIV-1-positive plasma samples, the Indian Envs were remarkably complex. With the exception of the Indian Envs, results of a hierarchical clustering analysis showed a strong subtype association with the patterns of neutralization susceptibility. From these patterns we were able to identify 19 neutralization cluster-associated amino acid signatures in gp120 and 14 signatures in the ectodomain and cytoplasmic tail of gp41. We conclude that newly transmitted Indian Envs are antigenically complex in spite of close genetic similarity. Delineation of neutralization-associated amino acid signatures provides a deeper understanding of the antigenic structure of HIV-1 Env.

journal_name

Virology

journal_title

Virology

authors

Kulkarni SS,Lapedes A,Tang H,Gnanakaran S,Daniels MG,Zhang M,Bhattacharya T,Li M,Polonis VR,McCutchan FE,Morris L,Ellenberger D,Butera ST,Bollinger RC,Korber BT,Paranjape RS,Montefiori DC

doi

10.1016/j.virol.2008.12.032

subject

Has Abstract

pub_date

2009-03-15 00:00:00

pages

505-20

issue

2

eissn

0042-6822

issn

1096-0341

pii

S0042-6822(08)00845-3

journal_volume

385

pub_type

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