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Combined Deficiency of Proapoptotic Regulators Bim and Fas Results in the Early Onset of Systemic Autoimmunity

  • Jack Hutcheson
  • , John C. Scatizzi
  • , Akbar M. Siddiqui
  • , G. Kenneth Haines
  • , Tianfu Wu
  • , Quan Zhen Li
  • , Laurie S. Davis
  • , Chandra Mohan
  • , Harris Perlman

Research output: Contribution to journalArticlepeer-review

195 Scopus citations

Abstract

Alterations in the stoichiometric balance between members of Bcl-2 and Fas apoptotic pathway could lead to the pathogenesis of systemic lupus erythematosus (SLE). We showed that patients with SLE displayed increased expression in antiapoptotic members of the Bcl-2 and Fas apoptotic pathways in isolated mononuclear cells. Further, mice (Bcl2l11-/-Faslpr/lpr) lacking the Bcl-2 pro-apoptotic member, Bim (Bcl2l11-/-) and and with an lpr mutation in the gene encoding Fas (Faslpr/lpr) developed severe SLE-like disease by 16 weeks of age unlike Bcl2l11-/- or Faslpr/lpr mice. Bcl2l11-/-Faslpr/lpr antigen-presenting cells (APCs) were markedly activated, and their numbers were increased in lymphoid tissues and in kidneys, yet numerous TUNEL-positive cells were observed in glomeruli of Bcl2l11-/-Faslpr/lpr mice. These data demonstrate that dysregulation of the Bcl-2 or Fas pathways can alter the function of APCs, thereby leading to SLE pathogenesis.

Original languageEnglish
Pages (from-to)206-217
Number of pages12
JournalImmunity
Volume28
Issue number2
DOIs
StatePublished - 15 Feb 2008
Externally publishedYes

Keywords

  • MOLIMMUNO

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