PMID: 7545977Nov 1, 1994Paper

HIV type 1 variation in World Health Organization-sponsored vaccine evaluation sites: genetic screening, sequence analysis, and preliminary biological characterization of selected viral strains. WHO Network for HIV Isolation and Characterization

AIDS Research and Human Retroviruses

Abstract

A laboratory network has been established by the World Health Organization (WHO) to systematically isolate and characterize HIV strains from different parts of the world, and to obtain information and reagents that would facilitate HIV vaccine development. Sixty-three HIV-1 isolates obtained from 224 specimens collected during 1992-1993 in Brazil, Rwanda, Thailand, and Uganda were characterized in this initial study. Virus strains were first genetically subtyped using three different screening methodologies: PCR-gag fingerprinting, RNase A mismatch, and heteroduplex mobility assay (HMA). In addition, selected viruses were sequenced in V3 (52 strains), C2-V3 (42 strains), gp120 (15 strains), and/or gp160 (8 strains) regions of their envelope genes. These studies identified viruses belonging to different sequence subtypes in the four countries: 16 subtype B and 1 subtype C strains in Brazil, 13 subtype A strains in Rwanda, 15 subtype E and 2 subtype B strains in Thailand, and 3 subtype A and 13 subtype D strains in Uganda. Comparison of sequence data with results from the genetic screening efforts identified the HMA as a rapid and reliable method for sequence subtype determinations. The majority of strains were collected from per...Continue Reading

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Citations

Nov 1, 1995·Journal of Medical Virology·J N NkengasongP Nys
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