[Single nucleotide polymorphisms of HIV coreceptor CCR5 gene in Chinese Yi ethnic group and its association with HIV infection].

Abstract

OBJECTIVE:

To investigate the single nucleotide polymorphism (SNP) of HIV-1 coreceptor CCR5 gene in Chinese Yi ethnic group and the association between these SNPs and HIV/AIDS.

METHODS:

Peripheral blood samples of 102 HIV negative persons of Chinese Yi nationality, 87 males amd 15 females, aged 23 (12-37), and 68 HIV carriers, 61 males and 7 females, aged 27 (17-51). The regulatory and structural regions of the HIV coreceptor CCR5 gene were amplified from the genomic DNA by nested PCR, each of the two regions was divided into three gene fragments which were overlapped. High throughput DHPLC was used for screening of unknown mutations in each gene fragment. The PCR products showing different peak traces from wild types in DHPLC were sequenced by forward and reverse primers respectively. The sequences were analyzed with the help of Sequence Navigator software to search for SNP loci. Statistical analysis by SPSS and PPAP softwares were made to study the association between these SNPs and HIV infection.

RESULTS:

Five SNPs (A77G, G316A, T532C, C921T, and G668A) and a AGA deletion of the 686-688 nucleotides were discovered in the coding region of this gene in Chinese Yi ethnic group. C921T mutation was a nonsense mutation, and the other SNPs (A77G, G316A, T532C, and G668A) are sense mutation, with the amino acid changes of K26R, G106R, C178R, and R223Q. Only the frequency of R223Q allelic gene was high (0.08) but those of the others were low (less than 0.01). There was no significant difference in the allele frequency between the HIV negative and HIV positive groups (all P > 0.05). Five SNP loci (T58934G, G59029A, T59353C, G59402A, and C59653T) were found in the regulatory region of CCR5 gene with high allelic frequencies of 0.1912-0.2941. Between the HIV negative and HIV positive groups, there were no differences in the SNP loc (all P > 0.05). Statistical analysis of the association between the linkage of mutation loci with HIV infection suggested a significant difference in the haplotype frequency of T59353C-G59402A between the HIV negative and HIV positive groups of the Yi population.

CONCLUSION:

A high throughput screening method of detecting unknown genetic mutation DHPLC can effectively analyze the SNP of CCR5 regulatory and structural regions in Chinese Yi ethnic group.

• Authors: Li-ying Ma, Kun-xue Hong, Xiao-zhi Lu, Guang-ming Qin, Jian-ping Chen, Kang-lin Chen, Yu-hua Ruan, Hui Xing, Jia-hong Zhu, Yi-ming Shao
• Journal: Zhonghua yi xue za zhi (Zhonghua Yi Xue Za Zhi) Vol. 85 Issue 45 Pg. 3181-5 (Nov 30 2005) ISSN: 0376-2491 [Print] China
• PMID: 16405836 (Publication Type: English Abstract, Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Receptors, CCR5

Topics

• Acquired Immunodeficiency Syndrome (genetics, virology)
• Adolescent
• Adult
• Child
• China
• Chromatography, High Pressure Liquid
• DNA Mutational Analysis
• Female
• Gene Frequency
• HIV Infections (genetics, virology)
• HIV-1 (metabolism)
• Humans
• Male
• Middle Aged
• Mutation
• Polymerase Chain Reaction
• Polymorphism, Single Nucleotide
• Receptors, CCR5 (genetics, metabolism)