Salt Intake, Endothelial Cell Signaling, and Progression of Kidney Disease

Academic Article

Abstract

  • It has been known for decades that increased dietary intake of salt (NaCl) shortens the life span of rats in a dose-dependent fashion. This review focuses specifically on the recently described biological effect and consequences of increased salt ingestion on the endothelium through a mechanism that is independent of blood pressure. Changes in salt intake are recognized by endothelial cells in the vascular tree and glomeruli through a physical process that promotes a series of signaling events involved in transcriptional regulation of genes that include transforming growth factor-β1 (TGF-β1) and the endothelial isoform of nitric oxide synthase (NOS3). A balance is struck between TGF-β1 and NOS3 as salt intake varies and creates a negative feedback loop, because TGF-β1 increased expression of NOS3 and NO inhibited production of TGF-β1 in healthy rats. Changes in this feedback system have been observed in salt-sensitive hypertension and appear to impact end-organ damage, particularly the kidney. The data support an important benefit to reduction of salt intake in the setting of chronic kidney disease.
  • Published In

  • Hypertension  Journal
  • Digital Object Identifier (doi)

    Author List

  • Sanders PW
  • Start Page

  • 142
  • End Page

  • 146
  • Volume

  • 43
  • Issue

  • 2 I