Shear stress increases nitric oxide production in thick ascending limbs

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Shear stress increases nitric oxide production in thick ascending limbs.

We showed that luminal flow stimulates nitric oxide (NO) production in thick ascending limbs. Ion delivery, stretch, pressure, and shear stress all increase when flow is enhanced. We hypothesized that shear stress stimulates NO in thick ascending limbs, whereas stretch, pressure, and ion delivery do not. We measured NO in isolated, perfused rat thick ascending limbs using the NO-sensitive dye D...

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Nitric oxide reduces flow-induced superoxide production via cGMP-dependent protein kinase in thick ascending limbs.

We have shown that increased luminal flow induces O(2)(-) and nitric oxide (NO) production in thick ascending limbs (TALs). However, the interaction of flow-stimulated NO and O(2)(-) in TALs is unclear. We hypothesized that NO inhibits flow-induced O(2)(-) production in TALs via cGMP-dependent protein kinase (PKG). We measured flow-stimulated O(2)(-) production in rat TALs using dihydroethidium...

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Angiotensin II stimulates superoxide production by nitric oxide synthase in thick ascending limbs.

Angiotensin II (Ang II) causes nitric oxide synthase (NOS) to become a source of superoxide (O2 (-)) via a protein kinase C (PKC)-dependent process in endothelial cells. Ang II stimulates both NO and O2 (-) production in thick ascending limbs. We hypothesized that Ang II causes O2 (-) production by NOS in thick ascending limbs via a PKC-dependent mechanism. NO production was measured in isolate...

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Resveratrol Increases Nitric Oxide Production in the Rat Thick Ascending Limb via Ca2+/Calmodulin

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Nitric oxide decreases the permselectivity of the paracellular pathway in thick ascending limbs.

Thick ascending limbs reabsorb 25% to 30% of the filtered NaCl. About 50% to 70% is reabsorbed via the transcellular pathway and 30% to 50% is reabsorbed through the Na-selective paracellular pathway. Nitric oxide (NO) inhibits transepithelial Na reabsorption, but its effects on the paracellular pathway are unknown. We hypothesized that NO decreases the selectivity of the paracellular pathway i...

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ژورنال

عنوان ژورنال: American Journal of Physiology-Renal Physiology

سال: 2010

ISSN: 1931-857X,1522-1466

DOI: 10.1152/ajprenal.00112.2010