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Immunosuppression-Independent Role of Regulatory T Cells against Hypertension-Driven Renal Dysfunctions

Salvatore Fabbiano1, Mauricio Menacho-Márquez1, Javier Robles-Valero1

  • 1Centro de Investigación del Cáncer, Consejo Superior de Investigaciones Científicas (CSIC)-University of Salamanca, Salamanca, Spain Instituto de Biología Molecular y Celular del Cáncer, Consejo Superior de Investigaciones Científicas (CSIC)-University of Salamanca, Salamanca, Spain.

Molecular and Cellular Biology
|August 5, 2015
PubMed

Insights

Regulatory T (TREG) cells protect against hypertension-induced cardiorenal damage. Their CD39 enzyme triggers neutrophil apoptosis, preventing inflammation and fibrosis in the heart and kidneys.

Area of Science:

  • Immunology
  • Cardiovascular Science
  • Nephrology

Background:

  • Hypertension-induced cardiorenal diseases pose a significant global health challenge.
  • Hematopoietic cells contribute to cardiorenal damage via inflammatory and fibrotic pathways.
  • Specific cell subtypes mediating this damage remain poorly understood.

Purpose of the Study:

  • To identify specific cell subtypes involved in hypertension-associated cardiorenal damage.
  • To elucidate the protective mechanisms employed by these cells.
  • To explore potential therapeutic targets for cardiorenal diseases.

Main Methods:

  • Investigated the role of CD39(+) regulatory T (TREG) cells in angiotensin II (AngII)-induced hypertension.
  • Assessed the mechanism of TREG cell-mediated protection, focusing on CD39 activity.
  • Utilized experimental and genetic models to alter TREG/TH cell ratios and evaluate cardiorenal outcomes.

Main Results:

  • CD39(+) TREG cells protect against renal and cardiac damage in AngII-dependent hypertension.
  • This protection is mediated by the ecto-ATP diphosphohydrolase activity of CD39, inducing neutrophil apoptosis.
  • Altered TREG/TH cell ratios impacted neutrophil counts, cardiomyocyte hypertrophy, and cardiorenal fibrosis.

Conclusions:

  • TREG cells act as a crucial barrier against hypertension-driven tissue fibrosis.
  • CD39-mediated neutrophil apoptosis is a key protective mechanism.
  • Targeting TREG cells offers potential therapeutic strategies for hypertension-linked cardiorenal diseases.

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