Collecting duct-specific knockout of the endothelin B receptor causes hypertension and sodium retention

Jul 27, 2006American journal of physiology. Renal physiology

Removing endothelin B receptors in kidney salt-collecting cells may cause high blood pressure and salt buildup

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Abstract

CD ETB receptor knockout mice displayed elevated blood pressure, particularly during high-salt feeding.

  • Systolic blood pressure was increased in mice lacking the CD ETB receptor on both normal and high-salt diets.
  • CD ETB KO mice experienced lower hypertension compared to CD ET-1 KO mice, indicating differing roles of these receptors.
  • Impaired sodium excretion was observed in CD ETB KO mice following acute sodium loading.
  • Decreased levels of aldosterone and plasma renin activity were noted in CD ETB KO mice regardless of dietary sodium intake.
  • Plasma and urinary ET-1 levels remained unchanged in CD ETB KO mice compared to controls.

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