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Amplification of Near Full-length HIV-1 Proviruses for Next-Generation Sequencing
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Near full-length genomes of 15 HIV type 1 group O isolates

Julie Yamaguchi1, Pierre Bodelle, Lazare Kaptué

  • 1Abbott Laboratories, Abbott Park, Illinois 60064, USA.

AIDS Research and Human Retroviruses
|December 18, 2003
PubMed

Insights

This study proposes a classification for human immunodeficiency virus type 1 (HIV-1) group O, identifying three distinct subtypes (I-III) and potential circulating recombinant forms. This advances HIV-1 genetic diversity understanding.

Area of Science:

  • Virology
  • Genetics
  • Molecular Biology

Background:

  • Human immunodeficiency virus type 1 (HIV-1) comprises groups M, N, and O, with group M extensively subclassified.
  • Group O, despite genetic diversity comparable to group M subtypes, lacks formal subtype classification.
  • Previous phylogenetic analyses suggested five clusters within group O, necessitating further genomic data for classification.

Purpose of the Study:

  • To perform comprehensive phylogenetic analysis of group O HIV-1 isolates.
  • To establish a formal classification system for group O HIV-1 subtypes.
  • To investigate genetic diversity and recombination within group O.

Main Methods:

  • Full genome sequencing of 15 group O HIV-1 isolates.
  • Phylogenetic analysis incorporating 15 new sequences and 8 existing group O genomes.
  • Analysis of intra- and intersubtype genetic distances and identification of recombination events.

Main Results:

  • Phylogenetic analysis supports the classification of three group O subtypes (I-III).
  • Evidence suggests the potential existence of one circulating recombinant form (CRF) (IV) and at least one additional subtype (V).
  • Intra- and intersubtype genetic distances for group O are comparable to group M subtypes; 13% of genomes showed intersubtype recombination.

Conclusions:

  • The study provides a robust framework for classifying group O HIV-1 subtypes.
  • Formal classification awaits further genomic data and consensus from the HIV nomenclature committee.
  • Findings contribute to a deeper understanding of HIV-1 genetic diversity and evolution.

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