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Comprehensive Characterization of the Transmitted/Founder env Genes From a Single MSM Cohort in China

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Title: Comprehensive Characterization of the Transmitted/Founder env Genes From a Single MSM Cohort in China
Authors: Chen, Y
Li, N
Zhang, T
Huang, X
Cai, F
Vandergrift, N
Xin, R
Meng, Z
Zhang, X
Jiang, C
Xu, X
Montefiori, DC
Gao, F
Wu, H
Item Type: Journal Article
Abstract: Background: The men having sex with men (MSM) population has become one of the major risk groups for HIV-1 infection in China. However, the epidemiological patterns, function of the env genes, and autologous and heterologous neutralization activity in the same MSM population have not been systematically characterized. Methods: The env gene sequences were obtained by the single genome amplification. The time to the most recent common ancestor was estimated for each genotype using the Bayesian Markov Chain Monte Carlo approach. Coreceptor usage was determined in NP-2 cells. Neutralization was analyzed using Env pseudoviruses in TZM-bl cells. Results: We have obtained 547 full-length env gene sequences by single genome amplification from 30 acute/early HIV-1–infected individuals in the Beijing MSM cohort. Three genotypes (subtype B, CRF01_AE, and CRF07_BC) were identified and 20% of the individuals were infected with multiple transmitted/founder (T/F) viruses. The tight clusters of the MSM sequences regardless of geographic origins indicated nearly exclusive transmission within the MSM population and limited number of introductions. The time to the most recent common ancestor for each genotype was 10–15 years after each was first introduced in China. Disparate preferences for coreceptor usages among 3 genotypes might lead to the changes in percentage of different genotypes in the MSM population over time. The genotype-matched and genotype-mismatched neutralization activity varied among the 3 genotypes. Conclusions: The identification of unique characteristics for transmission, coreceptor usage, neutralization profile, and epidemic patterns of HIV-1 is critical for the better understanding of transmission mechanisms, development of preventive strategies, and evaluation of vaccine efficacy in the MSM population in China.
Issue Date: 1-Aug-2015
Date of Acceptance: 26-Feb-2015
URI: http://hdl.handle.net/10044/1/40106
DOI: http://dx.doi.org/10.1097/QAI.0000000000000649
ISSN: 1944-7884
Publisher: Wolters Kluwer
Start Page: 403
End Page: 412
Journal / Book Title: JAIDS-Journal of Acquired Immune Deficiency Syndromes
Volume: 69
Issue: 4
Copyright Statement: © 2015 Wolters Kluwer Health, Inc. All rights reserved. This is the accepted version of an article published in final form at http://dx.doi.org/10.1097/QAI.0000000000000649.
Sponsor/Funder: Commission of the European Communities
St Stephen's Aids Trust
Funder's Grant Number: 305578
n/a
Keywords: Science & Technology
Life Sciences & Biomedicine
Immunology
Infectious Diseases
genotype
genetic diversity
transmission
neutralization
coreceptor usage
HUMAN-IMMUNODEFICIENCY-VIRUS
CIRCULATING RECOMBINANT FORMS
TYPE-1 SUBTYPE
DISEASE PROGRESSION
EXPANDING EPIDEMIC
HIV-1 INFECTION
SEX
MEN
CORECEPTOR
IDENTIFICATION
China
Gene Expression Regulation, Viral
Genotype
HIV Infections
HIV-1
Homosexuality, Male
Humans
Male
env Gene Products, Human Immunodeficiency Virus
Virology
1103 Clinical Sciences
Publication Status: Published
Appears in Collections:Department of Medicine (up to 2019)