Document Detail


Genotypic subtyping of the HIV-1 polymerase gene in 30 naåve patients from Thailand.
MedLine Citation:
PMID:  11556588     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To investigate the subtype classification of the circulating virus strains among infected Thai patients with human immunodeficiency virus type 1 (HIV-1). A random population of patients who were HIV-1 antibody positive after two independent screening assays was selected. HIV RNA from plasma samples was reverse-transcribed and amplified with specific primers that annealed to conserve regions of the HIV-1 pol gene. Amplified products were sequenced directly by using an automated sequencer. The sequencing products represent about 1.2 kb of the pol gene from each patient and they were phylogenetically analyzed and compared to the corresponding pol sequences of the published HIV-1 sequences of known genotypes. Genotype E was found in 25 of 30 patients (83.3%), and 5 patients (16.7%) were HIV-1 genotype B. The result confirmed that HIV-1 subtype E is still predominant in Thailand. Genotype B is found frequently, but there have been no examples of genotype A. In concordance with the serotypic assay, which was previously reported using the V3-peptide enzyme immunoassay (V3-PEIA), the genotypic assay of subtype E was high, at 80% and 83.3% in serotyping and genotyping, respectively. These findings of two subtypes with low heterogeneity indicate that Thailand may be a desirable site for evaluating candidate HIV-1 antiretroviral drugs and vaccines. The mixture of subtype E and B' strains also offers the opportunity to study phenotypic differences between the two subtypes.
Authors:
S Auswinporn; E Jenwitheesuk; A Vibhagool; M Sookpranee; M Leechawengwong; W Chantratita
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Southeast Asian journal of tropical medicine and public health     Volume:  32     ISSN:  0125-1562     ISO Abbreviation:  Southeast Asian J. Trop. Med. Public Health     Publication Date:  2001 Jun 
Date Detail:
Created Date:  2001-09-14     Completed Date:  2002-01-07     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0266303     Medline TA:  Southeast Asian J Trop Med Public Health     Country:  Thailand    
Other Details:
Languages:  eng     Pagination:  346-50     Citation Subset:  IM    
Affiliation:
Department of Pathology, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand.
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MeSH Terms
Descriptor/Qualifier:
DNA-Directed RNA Polymerases / genetics*
Genotype*
HIV-1 / classification,  enzymology,  genetics*
Humans
Reverse Transcriptase Polymerase Chain Reaction
Thailand
United States
Chemical
Reg. No./Substance:
EC 2.7.7.6/DNA-Directed RNA Polymerases

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