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HIV types, groups, subtypes and recombinant forms: errors in replication, selection pressure and quasispecies

Josef Eberle1, Lutz Gürtler

  • 1Max von Pettenkofer Institute, Ludwig Maximilian University Munich, Munich, Germany.

Intervirology
|January 31, 2012
PubMed

Insights

Human immunodeficiency virus (HIV) diversity arises from zoonotic origins and extensive mutation within hosts. Genetic factors in both viruses and humans significantly influence HIV pathogenesis and clinical outcomes.

Area of Science:

  • Virology
  • Genetics
  • Immunology

Background:

  • Human Immunodeficiency Virus (HIV) originated from zoonotic transmission events from chimpanzees and sooty mangabeys, leading to HIV-1 and HIV-2 infections in humans.
  • Both HIV-1 and HIV-2 have circulated in human populations for approximately 80 years, undergoing significant mutation and recombination.
  • Viral diversity is driven by host immune system pressure, superinfection, drug selection, and host genetic factors.

Purpose of the Study:

  • To explore the origins and evolutionary dynamics of HIV diversity.
  • To investigate the roles of viral and human genetic factors in HIV pathogenesis.
  • To understand the impact of genetic diversity on geographic distribution and clinical outcomes.

Main Methods:

  • Analysis of viral genetic sequences to identify conserved regions and patterns of mutation.
  • Investigation of host genetic factors, including Human Leukocyte Antigen (HLA) and specific proteins, influencing viral evolution.
  • Review of existing literature on zoonotic origins and viral evolution.

Main Results:

  • HIV diversity results from zoonotic events, host immune selection, mutation, recombination, and drug pressure.
  • Essential parts of the HIV genome are highly conserved despite overall variability.
  • Specific viral proteins (Tat, Vif, Rev) and human genetic factors (APOBEC, CCR5, HLA variants) significantly influence pathogenesis and clinical outcomes.

Conclusions:

  • HIV diversity is a complex interplay between viral evolution and host genetics.
  • Understanding these genetic factors is crucial for developing effective therapeutic and preventative strategies.
  • Host genetic factors like CCR5 and specific HLA types are associated with better clinical outcomes in HIV infection.

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