Glucocorticoid induced TNF receptor family-related protein (GITR) - A novel driver of atherosclerosis

Laura A Bosmans1, Annelie Shami2, Dorothee Atzler3

  • 1Department of Medical Biochemistry, Amsterdam Cardiovascular Sciences (ACS), Amsterdam University Medical Centres, University of Amsterdam, Amsterdam, the Netherlands.

Insights

Glucocorticoid-induced tumor necrosis factor receptor (GITR) is a key driver of atherosclerosis. Targeting GITR may reduce cardiovascular disease risk in patients with persistent inflammation despite lipid-lowering therapies.

Area of Science:

  • Immunology
  • Cardiovascular Medicine
  • Inflammation Biology

Background:

  • Atherosclerosis is a chronic inflammatory disease with residual cardiovascular risk despite lipid-lowering treatments.
  • Immune checkpoint proteins like CD86, CD40L, and CD40 are implicated in atherosclerosis development.
  • Elevated soluble glucocorticoid-induced tumor necrosis factor receptor family-related protein (GITR) levels are observed in cardiovascular patients.

Purpose of the Study:

  • To review the role of GITR in cardiovascular disease and explore its potential as a therapeutic target.
  • To discuss GITR's impact on immune cells, signaling pathways, and atherosclerotic plaque development.

Main Methods:

  • Review of existing literature on GITR's involvement in atherosclerosis.
  • Analysis of GITR expression in human carotid endarterectomy plaques.
  • Examination of GITR's effect on atherosclerotic plaque development in murine models.

Main Results:

  • GITR expression is higher in symptomatic human carotid plaques and correlates with plaque vulnerability.
  • Depletion of GITR reduces atherosclerotic plaque development in mice.
  • GITR-deficient monocytes and macrophages show reduced inflammatory potential and migration.

Conclusions:

  • GITR plays a pivotal role in cardiovascular disease pathogenesis.
  • GITR represents a promising novel drug target for reducing residual cardiovascular risk in atherosclerosis.

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