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. 2007 Feb 5;358(1):178-91.
doi: 10.1016/j.virol.2006.07.055. Epub 2006 Sep 25.

Distinguishing molecular forms of HIV-1 in Asia with a high-throughput, fluorescent genotyping assay, MHAbce v.2

Gustavo H Kijak  1 , Sodsai Tovanabutra, Eric Sanders-Buell, Veerachai Watanaveeradej, Mark S de Souza, Kenrad E Nelson, Vidhaya Ketsararat, Vilawan Gulgolgarn, Manu Wera-arpachai, Somchai Sriplienchan, Chirasak Khamboonrueng, Deborah L Birx, Merlin L Robb, Francine E McCutchan
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Free article

Distinguishing molecular forms of HIV-1 in Asia with a high-throughput, fluorescent genotyping assay, MHAbce v.2

Gustavo H Kijak et al. Virology. .
Free article

Abstract

High-resolution HIV-1 genotyping of large sample sets is crucial to define the evolving and dynamic epidemics in Asia. Here we present MHAbce v.2, a multi-region hybridization assay that individually discriminates subtypes B, C, CRF01_AE, and virtually all of their described recombinants, based on real-time PCR using subtype-specific TaqMan probes in 8 regions throughout the viral genome. In a validation panel (n=70), the assay performed with a sensitivity of 95.7% and specificity of 99.8%. The assay was field-tested on samples from a retrospective MTCT cohort (n=180; Lampang Province, Northern Thailand; 1996-1998). 177/180 of the samples were typeable, and 94.4% were typed as CRF01_AE. The remaining strains represented even proportions of subtype B and B/CRF01_AE recombinants and were confirmed by sequencing, revealing early links between the heterosexual and IDU HIV-1 epidemics in Thailand. MHAbce v.2, with an area of application including China, India, Southeast Asia, and the Pacific Rim, can be used to develop a comprehensive and detailed picture of this important component of the HIV/AIDS pandemic.

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