Frontiers in Immunology (Aug 2021)

The Role of Regulatory T Cells in Pulmonary Arterial Hypertension

  • Wen Tian,
  • Wen Tian,
  • Shirley Y. Jiang,
  • Xinguo Jiang,
  • Xinguo Jiang,
  • Rasa Tamosiuniene,
  • Dongeon Kim,
  • Torrey Guan,
  • Siham Arsalane,
  • Siham Arsalane,
  • Shravani Pasupneti,
  • Norbert F. Voelkel,
  • Qizhi Tang,
  • Mark R. Nicolls,
  • Mark R. Nicolls

DOI
https://doi.org/10.3389/fimmu.2021.684657
Journal volume & issue
Vol. 12

Abstract

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Pulmonary arterial hypertension (PAH) is a chronic, incurable condition characterized by pulmonary vascular remodeling, perivascular inflammation, and right heart failure. Regulatory T cells (Tregs) stave off autoimmunity, and there is increasing evidence for their compromised activity in the inflammatory milieu of PAH. Abnormal Treg function is strongly correlated with a predisposition to PAH in animals and patients. Athymic Treg-depleted rats treated with SU5416, an agent causing pulmonary vascular injury, develop PAH, which is prevented by infusing missing CD4+CD25highFOXP3+ Tregs. Abnormal Treg activity may also explain why PAH disproportionately affects women more than men. This mini review focuses on the role of Tregs in PAH with a special view to sexual dimorphism and the future promise of Treg therapy.

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