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[Genetic predisposition to infectious diseases]

A Dessein1

  • 1INSERM U399 Immunologie et Génétique des Maladies Parasitaires, Faculté de Médecine, Marseille, France.

Medecine Tropicale : Revue Du Corps De Sante Colonial
|January 1, 1997
PubMed
Summary

Genetic factors influence infectious disease resistance within species. Studies reveal specific gene variations, like those affecting red blood cells and T-lymphocyte differentiation, impact susceptibility to malaria, Schistosoma mansoni, and HIV.

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Area of Science:

  • Genetics
  • Immunology
  • Infectious Diseases

Context:

  • While interspecies transmission barriers are well-studied, intraspecies resistance mechanisms are increasingly recognized.
  • Genetic variations within species significantly influence host susceptibility to various pathogens.

Purpose:

  • To explore genetic underpinnings of infectious disease resistance within species.
  • To highlight examples of genetic protection against malaria, Schistosoma mansoni, and HIV.

Summary:

  • Genetic resistance to malaria is linked to red blood cell protein polymorphisms.
  • Schistosoma mansoni infection intensity is controlled by a major gene on chromosome 5, influencing T-lymphocyte differentiation.
  • HIV resistance in some individuals is associated with a chemokine receptor gene deletion, hindering viral entry into macrophages.

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Impact:

  • Understanding these genetic factors can inform personalized medicine and disease prevention strategies.
  • Identifies key genetic loci and mechanisms conferring resistance to significant human pathogens.