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Updated: Jun 6, 2026

An Affordable HIV-1 Drug Resistance Monitoring Method for Resource Limited Settings
Published on: March 30, 2014
An HIV-1 resistance polymorphism in TRIM5α gene among Chinese intravenous drug users
Feng-Liang Liu1, Yu-Qing Qiu, Hong Li
1Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan, China.
Background:
TRIM5α has species-specific restriction activity against replication of many retroviruses, including HIV-1. Though human also express TRIM5α protein, it is less potent in suppressing infection of HIV-1 than most orthologs of other nonhuman primates. Previous association studies suggested that polymorphisms in TRIM5α gene might protect against HIV-1 infection. However, the exact variation accounting for this protective effect was not certain.
Methods:
One thousand two hundred ninety-four Chinese intravenous drug users (IDUs), including 1011 Hans and 283 Dai subjects, were investigated for sequence variations in TRIM5α and association with HIV-1 resistance. Resequencing of the putative functional domains in exon2 and exon8 was carried out in 1151 subjects, along with exon2 resequencing in a further 143 HIV-1-infected IDUs.
Results:
We identified 14 different nucleotide variants, including 4 with minor allele frequency >0.05. We observed that the frequency of 43Y homozygote in seronegative IDUs was significantly higher than that in the HIV-1-infected IDUs, suggesting a protective effect among the homozygote subjects [odds ratio (95% confidence interval) = 0.46 (0.22 to 0.94), P = 0.033, Mantel-Haenszel test].
Conclusions:
we concluded that H43Y might account for the HIV-1 resistance due to TRIM5α gene in Chinese IDUs.
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