Biosynthesis and homeostatic roles of nitric oxide in the normal kidney

DOI Web Site 5 Citations
  • B. C. Kone
    Department of Internal Medicine, University of Texas Medical School atHouston 77030, USA.
  • C. Baylis
    Department of Internal Medicine, University of Texas Medical School atHouston 77030, USA.

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<jats:p> Nitric oxide (NO) is an important molecular mediator of numerous physiological processes in virtually every organ. In the kidney, NO plays prominent roles in the homeostatic regulation of glomerular, vascular, and tubular function. Differential expression and regulation of the NO synthase (NOS) gene family contribute to this diversity of action. This review explores recent advances in the molecular and cell biology of the NOS isoforms and relates these findings to functions of NO in the control of normal renal hemodynamics, the glomerular microcirculation, and renal salt excretion. Newly recognized molecular diversity of the NOS gene products, factors governing NOS isozyme gene expression and catalytic activity, and the intrarenal distribution of the NOS isoforms are examined. Physiological data regarding the complex roles of NO in the control of renal hemodynamics and the glomerular microcirculation are analyzed, and the effects of chronic NOS inhibition on glomerular function and structure are presented. The contributions of NO to renal salt excretion as well as functional and molecular biological evidence for adaptive changes in NOS isoform expression during variations in dietary salt balance are discussed. Current investigative challenges and goals for future research of renal NO biology are presented. </jats:p>

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