Inflammation and autoimmunity caused by a SHP1 mutation depend on IL-1, MyD88, and a microbial trigger

Ben A. Croker, Brian R. Lawson, Michael Berger, Celine Eidenschenk, Amanda L. Blasius, Eva Marie Y Moresco, Sosathya Sovath, Louise Cengia, Leonard D. Shultz, Argyrios N. Theofilopoulos, Sven Pettersson, Bruce Alan Beutler

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

Abstract

A recessive phenotype called spin (spontaneous inflammation) was induced by N-ethyl-N-nitrosourea (ENU) mutagenesis in C57BL/6J mice. Homozygotes display chronic inflammatory lesions affecting the feet, salivary glands and lungs, and antichromatin antibodies. They are immunocompetent and show enhanced resistance to infection by Listeria monocytogenes. TLR-induced TNF and IL-1 production are normal in macrophages derived from spin mice. The autoinflammatory phenotype of spin mice is fully suppressed by compound homozygosity for Myd88poc, Irak4otiose, and Il1r1-null mutations, but not Ticam1Lps2, Stat1m1Btlr, or Tnf-null mutations. Both autoimmune and autoinflammatory phenotypes are suppressed when spin homozygotes are derived into a germ-free environment. The spin phenotype was ascribed to a viable hypomorphic allele of Ptpn6, which encodes the tyrosine phosphatase SHP1, mutated in mice with the classical motheaten alleles me and me-v. Inflammation and autoimmunity caused by SHP1 deficiency are thus conditional. The SHP1-deficient phenotype is driven by microbes, which activate TLR signaling pathways to elicit IL-1 production. IL-1 signaling via MyD88 elicits inflammatory disease.

Original languageEnglish (US)
Pages (from-to)15028-15033
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume105
Issue number39
DOIs
StatePublished - Sep 30 2008

Keywords

  • Ptpn6
  • Toll-like receptors

ASJC Scopus subject areas

  • General

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