The contribution of natural selection to present-day susceptibility to chronic inflammatory and autoimmune disease

Curr Opin Immunol. 2014 Dec;31:66-78. doi: 10.1016/j.coi.2014.09.008. Epub 2014 Oct 22.

Abstract

Chronic inflammatory and autoimmune diseases have been the focus of many genome-wide association studies (GWAS) because they represent a significant cause of illness and morbidity, and many are heritable. Almost a decade of GWAS studies suggests that the pathological inflammation associated with these diseases is controlled by a limited number of networked immune system genes. Chronic inflammatory and autoimmune diseases are enigmatic from an evolutionary perspective because they exert a negative affect on reproductive fitness. The persistence of these conditions may be partially explained by the important roles the implicated immune genes play in pathogen defense and other functions thought to be under strong natural selection in humans. The evolutionary reasons for chronic inflammatory and autoimmune disease persistence and uneven distribution across populations are the focus of this review.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Animals
  • Autoimmune Diseases / genetics*
  • Autoimmune Diseases / immunology*
  • Chronic Disease
  • Genetic Predisposition to Disease*
  • Genome-Wide Association Study
  • Humans
  • Inflammation / genetics
  • Inflammation / immunology
  • Inflammation / pathology
  • Selection, Genetic*