Coinfection and Genetic Recombination between HIV-1 Strains

Possible Biological Implications in Australia and South East Asia

N. K. Saksena, B. Wang, Y. C. Ge, Shi-Hua Xiang, D. E. Dwyer, A. L. Cunningham

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

It has been recognised that human immunodeficiency virus (HIV) mutates rapidly and that nucleotide substitutions, deletions, insertions, and rearrangements resulting from recombination events are the main factors that result in variation of the HIV-1 genome. Together, these processes are actively contributing to the diversity and virulence of viral forms comprising the acquired immune deficiency syndrome (AIDS) pandemic. There are 9 HIV-1 subtypes recognised (A-H and O), based on the envelope region segments. Inter-subtype recombination has been already described, whereas intra-subtype recombination has been difficult to detect. In this study, we have identified in vivo genetic recombination between HIV-I strains belonging to subtype B in a patient who presented both intravenous drug use (IVDU) and homosexual sex as risk factors. Genetic analysis of viral strains in the hypervariable V3 region of the envelope gene indicated the presence of three distinct sequence groups categorized according to their respective tetrapeptide motifs - GPGR, GLGR and GPGK. Detailed genetic and phylogenetic analyses suggested the recombination occurring only between sequence groups with GPGR and GPGK tetrapeptide motifs. These data suggest that coinfection with closely related strains can occur in vivo, and the generation of hybrid HIV-1 genomes via genetic recombination between subtype B strains can result in further antigenic diversity which may thwart diagnosis and future vaccine efforts. Since HIV-1 subtype B is still the most commonly found subtype around the globe, the hybrid genomes between different subtype B strains may result in epidemiologic shifts and altered pathogenesis.

Original languageEnglish (US)
Pages (from-to)121-127
Number of pages7
JournalAnnals of the Academy of Medicine Singapore
Volume26
Issue number1
StatePublished - Jan 1 1997

Fingerprint

South Australia
Far East
Coinfection
Genetic Recombination
HIV-1
Genome
HIV
Antigenic Variation
Pandemics
Virulence
Acquired Immunodeficiency Syndrome
Vaccines
Nucleotides
Pharmaceutical Preparations
Genes

Keywords

  • Break-points
  • Envelope V3
  • Polymerase chain reaction
  • Recombination

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Coinfection and Genetic Recombination between HIV-1 Strains : Possible Biological Implications in Australia and South East Asia. / Saksena, N. K.; Wang, B.; Ge, Y. C.; Xiang, Shi-Hua; Dwyer, D. E.; Cunningham, A. L.

In: Annals of the Academy of Medicine Singapore, Vol. 26, No. 1, 01.01.1997, p. 121-127.

Research output: Contribution to journalArticle

@article{6fd1540f21c34bbdad32163406c53fa4,
title = "Coinfection and Genetic Recombination between HIV-1 Strains: Possible Biological Implications in Australia and South East Asia",
abstract = "It has been recognised that human immunodeficiency virus (HIV) mutates rapidly and that nucleotide substitutions, deletions, insertions, and rearrangements resulting from recombination events are the main factors that result in variation of the HIV-1 genome. Together, these processes are actively contributing to the diversity and virulence of viral forms comprising the acquired immune deficiency syndrome (AIDS) pandemic. There are 9 HIV-1 subtypes recognised (A-H and O), based on the envelope region segments. Inter-subtype recombination has been already described, whereas intra-subtype recombination has been difficult to detect. In this study, we have identified in vivo genetic recombination between HIV-I strains belonging to subtype B in a patient who presented both intravenous drug use (IVDU) and homosexual sex as risk factors. Genetic analysis of viral strains in the hypervariable V3 region of the envelope gene indicated the presence of three distinct sequence groups categorized according to their respective tetrapeptide motifs - GPGR, GLGR and GPGK. Detailed genetic and phylogenetic analyses suggested the recombination occurring only between sequence groups with GPGR and GPGK tetrapeptide motifs. These data suggest that coinfection with closely related strains can occur in vivo, and the generation of hybrid HIV-1 genomes via genetic recombination between subtype B strains can result in further antigenic diversity which may thwart diagnosis and future vaccine efforts. Since HIV-1 subtype B is still the most commonly found subtype around the globe, the hybrid genomes between different subtype B strains may result in epidemiologic shifts and altered pathogenesis.",
keywords = "Break-points, Envelope V3, Polymerase chain reaction, Recombination",
author = "Saksena, {N. K.} and B. Wang and Ge, {Y. C.} and Shi-Hua Xiang and Dwyer, {D. E.} and Cunningham, {A. L.}",
year = "1997",
month = "1",
day = "1",
language = "English (US)",
volume = "26",
pages = "121--127",
journal = "Annals of the Academy of Medicine, Singapore",
issn = "0304-4602",
publisher = "Academy of Medicine Singapore",
number = "1",

}

TY - JOUR

T1 - Coinfection and Genetic Recombination between HIV-1 Strains

T2 - Possible Biological Implications in Australia and South East Asia

AU - Saksena, N. K.

AU - Wang, B.

AU - Ge, Y. C.

AU - Xiang, Shi-Hua

AU - Dwyer, D. E.

AU - Cunningham, A. L.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - It has been recognised that human immunodeficiency virus (HIV) mutates rapidly and that nucleotide substitutions, deletions, insertions, and rearrangements resulting from recombination events are the main factors that result in variation of the HIV-1 genome. Together, these processes are actively contributing to the diversity and virulence of viral forms comprising the acquired immune deficiency syndrome (AIDS) pandemic. There are 9 HIV-1 subtypes recognised (A-H and O), based on the envelope region segments. Inter-subtype recombination has been already described, whereas intra-subtype recombination has been difficult to detect. In this study, we have identified in vivo genetic recombination between HIV-I strains belonging to subtype B in a patient who presented both intravenous drug use (IVDU) and homosexual sex as risk factors. Genetic analysis of viral strains in the hypervariable V3 region of the envelope gene indicated the presence of three distinct sequence groups categorized according to their respective tetrapeptide motifs - GPGR, GLGR and GPGK. Detailed genetic and phylogenetic analyses suggested the recombination occurring only between sequence groups with GPGR and GPGK tetrapeptide motifs. These data suggest that coinfection with closely related strains can occur in vivo, and the generation of hybrid HIV-1 genomes via genetic recombination between subtype B strains can result in further antigenic diversity which may thwart diagnosis and future vaccine efforts. Since HIV-1 subtype B is still the most commonly found subtype around the globe, the hybrid genomes between different subtype B strains may result in epidemiologic shifts and altered pathogenesis.

AB - It has been recognised that human immunodeficiency virus (HIV) mutates rapidly and that nucleotide substitutions, deletions, insertions, and rearrangements resulting from recombination events are the main factors that result in variation of the HIV-1 genome. Together, these processes are actively contributing to the diversity and virulence of viral forms comprising the acquired immune deficiency syndrome (AIDS) pandemic. There are 9 HIV-1 subtypes recognised (A-H and O), based on the envelope region segments. Inter-subtype recombination has been already described, whereas intra-subtype recombination has been difficult to detect. In this study, we have identified in vivo genetic recombination between HIV-I strains belonging to subtype B in a patient who presented both intravenous drug use (IVDU) and homosexual sex as risk factors. Genetic analysis of viral strains in the hypervariable V3 region of the envelope gene indicated the presence of three distinct sequence groups categorized according to their respective tetrapeptide motifs - GPGR, GLGR and GPGK. Detailed genetic and phylogenetic analyses suggested the recombination occurring only between sequence groups with GPGR and GPGK tetrapeptide motifs. These data suggest that coinfection with closely related strains can occur in vivo, and the generation of hybrid HIV-1 genomes via genetic recombination between subtype B strains can result in further antigenic diversity which may thwart diagnosis and future vaccine efforts. Since HIV-1 subtype B is still the most commonly found subtype around the globe, the hybrid genomes between different subtype B strains may result in epidemiologic shifts and altered pathogenesis.

KW - Break-points

KW - Envelope V3

KW - Polymerase chain reaction

KW - Recombination

UR - http://www.scopus.com/inward/record.url?scp=0030630546&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030630546&partnerID=8YFLogxK

M3 - Article

VL - 26

SP - 121

EP - 127

JO - Annals of the Academy of Medicine, Singapore

JF - Annals of the Academy of Medicine, Singapore

SN - 0304-4602

IS - 1

ER -