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Published in: Journal of NeuroVirology 4/2014

01-08-2014

Discordant patterns of tissue-specific genetic characteristics in the HIV-1 env gene from HIV-associated neurocognitive disorder (HAND) and non-HAND patients

Authors: Yabo Ouyang, Lifeng Liu, Yulin Zhang, Lin Yuan, Zhiying Liu, Sufang Yang, Feili Wei, Luxin Qiao, Dexi Chen

Published in: Journal of NeuroVirology | Issue 4/2014

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Abstract

The genetic evolution of HIV-1 in the central nervous system (CNS) is different from that in peripheral tissues. We analyzed 121 clonal sequences of the V3–V5 regions of the env gene generated from paired cerebrospinal fluid (CSF) and plasma samples from nine chronically infected patients (four with HIV-associated neurocognitive disorder (HAND) and five without HAND). The sequence analysis indicated the significant differences between CSF and plasma was only observed in the C4 region (P = 0.043) in HAND patients. Significant increases in synonymous substitutions (dS) within the V4 region (P = 0.020) and in nonsynonymous substitutions (dN) within the C4 region (P = 0.029) were observed in the CSF-derived sequences. By contrast, CSF-derived sequences from non-HAND patients showed similar levels of diversity; dS and dN as the plasma-derived sequences. Signature differences between the CSF- and plasma-derived sequences were found at 12 amino acid positions for HAND patients and nine positions for non-HAND patients. Interestingly, five sites (positions 388, 396, 397, 404, and 406) that all belong to signature patterns exhibited positive selection pressure in CSF samples, but only site 406 was positively selected in the plasma samples from the HAND patients. Conversely, in the non-HAND patients, there were four sites (positions 397, 404, 432, and 446) showed positive selection pressure in the plasma samples, but only site 446 in the CSF samples. These results suggest that discordant patterns of genetic evolution occur between the tissue-specific HIV-1 quasispecies in the HAND and non-HAND patients. Viral molecular heterogeneity between specific tissues is greater in patients with HAND compared to non-HAND patients.
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Metadata
Title
Discordant patterns of tissue-specific genetic characteristics in the HIV-1 env gene from HIV-associated neurocognitive disorder (HAND) and non-HAND patients
Authors
Yabo Ouyang
Lifeng Liu
Yulin Zhang
Lin Yuan
Zhiying Liu
Sufang Yang
Feili Wei
Luxin Qiao
Dexi Chen
Publication date
01-08-2014
Publisher
Springer US
Published in
Journal of NeuroVirology / Issue 4/2014
Print ISSN: 1355-0284
Electronic ISSN: 1538-2443
DOI
https://doi.org/10.1007/s13365-014-0247-5

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