Mutation of envelop protein V3 loop in HIV-1 epidemic in Liaoning province.
- Author:
Xiao-xu HAN
1
;
Hong SHANG
;
Li-ping ZHOU
;
Ya-nan WANG
;
Zi-ning ZHANG
;
Yong-jun JIANG
Author Information
- Publication Type:Journal Article
- MeSH: Acquired Immunodeficiency Syndrome; epidemiology; virology; Adult; Amino Acid Sequence; Child; China; epidemiology; Female; Genes, env; genetics; HIV Envelope Protein gp120; genetics; HIV Infections; epidemiology; virology; HIV-1; classification; genetics; Humans; Male; Molecular Sequence Data; Mutation; Viral Envelope Proteins; genetics
- From: Chinese Journal of Epidemiology 2003;24(8):704-707
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo study the characteristics of human immunodeficiency virus (HIV-1) V3 loop amino acid mutations among HIV-1 infected people in Liaoning province.
METHODSThe whole blood samples of the HIV carriers and AIDS patients were collected in Liaoning province, China and were extracted PBMC genome DNA. HIV-1 V3 and flanking region sequences were amplified by nest-polymerase chain reaction (nest-PCR) with env specific primers: ED5/ED12 and ED31/ED33. Products were sequenced directly and sequences were aligned, translated and analyzed.
RESULTSIn AIDS group, some amino acid mutations at specific position of V3 loop: S to R at position 11, H to S, T and N at position 13, A to V at position 19, F to Y at position 20, Q or D to N at position 25 and 29, were found and all common mutations were associated with T tropic/SI phenotype. The frequency of such amino acid mutations in specific positions was higher in AIDS group than that of the asymptomatic infection group (P < 0.05). In addition, we found some unusual tetramer compositions on the tip of V3 loop: GQGR, APGR and RPGA, GLGR, RPGA in addition to some rare mutations, such as: N to H at position 5 and H to S, F at position 34.
CONCLUSIONThe amino acid mutations on the V3 loop of HIV-1 epidemic in Liaoning province were in agreement with the results of subtype B, but we observed some rare mutations and unusual tetramer compositions on the tip of V3 loop.