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Growth arrest specific protein 6 participates in DOCA-induced target-organ damage

Joon-Keun Park1, Stefanie Theuer, Torsten Kirsch

  • 1Robert-Rössle-Str 10, 13125 Berlin, Germany.

Hypertension (Dallas, Tex. : 1979)
|July 1, 2009
PubMed

Insights

Growth arrest-specific protein 6 (Gas 6) drives aldosterone-induced organ damage. Gas 6 deficiency protects against cardiac and kidney damage, highlighting its role in mineralocorticoid receptor-mediated injury.

Area of Science:

  • Nephrology
  • Cardiology
  • Endocrinology

Background:

  • Growth arrest-specific protein 6 (Gas 6) is implicated in inflammation and vascular remodeling.
  • Aldosterone plays a key role in target organ damage, particularly in the cardiovascular and renal systems.

Purpose of the Study:

  • To investigate the role of Gas 6 in aldosterone-induced target organ damage.
  • To determine if Gas 6 deficiency mitigates cardiac and renal damage caused by excessive aldosterone.

Main Methods:

  • Upregulation of Gas 6 was observed in rats with high aldosterone levels.
  • In vitro studies showed aldosterone increased Gas 6 expression in vascular smooth muscle cells.
  • Deoxycorticosterone acetate (DOCA)-induced target organ damage was assessed in Gas 6 gene-deleted mice and wild-type littermates.

Main Results:

  • Gas 6 gene-deleted mice were protected from cardiac hypertrophy, reduced cardiac inflammation (interleukin-6) and fibrosis (collagen IV) compared to wild-type mice.
  • Renal function was improved in Gas 6-deficient mice, with reduced albuminuria, renal fibrosis, and fibronectin deposition.
  • Despite similar blood pressure elevations, Gas 6 deficiency attenuated aldosterone-induced cardiac and renal remodeling, independent of blood pressure changes.

Conclusions:

  • Gas 6 plays a significant role in mediating aldosterone-induced target organ damage.
  • Gas 6 deficiency confers protection against cardiac and renal remodeling and dysfunction.
  • Findings suggest potential clinical relevance for anticoagulant choices, as warfarin affects Gas 6 expression.

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