Constitutive nitric oxide synthesis in the kidney – functions at the juxtaglomerular apparatus

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Abstract:

Tubulo-vascular information transfer at the renal juxtaglomerular apparatus (JGA) serves to adjust the biosynthesis and release of renin, the key enzyme of the renin angiotensin system, and to regulate glomerular arteriolar muscle tone. The macula densa serves as a sensor of tubular NaCl. Concentration-dependent salt uptake through the Na-K-2Cl cotransporter located in the apical membrane of macula densa cells triggers a signal transduction cascade that involves the synthesis of nitric oxide (NO) through a type 1 NO synthase (NOS1) which is described with respect to its complex mRNA structure and regulatory aspects. The anatomical and functional targets of the NO-soluble guanylyl cyclase-cGMP pathway at the JGA are reviewed.

Keywords: Tubulo-glomerular feedback; nitric oxide synthase; renin

Document Type: Research Article

DOI: http://dx.doi.org/10.1046/j.1365-201x.2000.00750.x

Affiliations: Department of Anatomy, Charité, Humboldt University, Berlin, Germany

Publication date: August 1, 2000

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