GIMAP6 regulates autophagy, immune competence, and inflammation in mice and humans

J Exp Med. 2022 Jun 6;219(6):e20201405. doi: 10.1084/jem.20201405. Epub 2022 May 13.

Abstract

Inborn errors of immunity (IEIs) unveil regulatory pathways of human immunity. We describe a new IEI caused by mutations in the GTPase of the immune-associated protein 6 (GIMAP6) gene in patients with infections, lymphoproliferation, autoimmunity, and multiorgan vasculitis. Patients and Gimap6-/- mice show defects in autophagy, redox regulation, and polyunsaturated fatty acid (PUFA)-containing lipids. We find that GIMAP6 complexes with GABARAPL2 and GIMAP7 to regulate GTPase activity. Also, GIMAP6 is induced by IFN-γ and plays a critical role in antibacterial immunity. Finally, we observed that Gimap6-/- mice died prematurely from microangiopathic glomerulosclerosis most likely due to GIMAP6 deficiency in kidney endothelial cells.

Publication types

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

MeSH terms

  • Animals
  • Autophagy
  • Endothelial Cells / metabolism
  • GTP Phosphohydrolases* / genetics
  • GTP Phosphohydrolases* / metabolism
  • Humans
  • Immunologic Deficiency Syndromes*
  • Inflammation
  • Mice

Substances

  • GIMAP6 protein, human
  • GTP Phosphohydrolases