PMID- 10516280 OWN - NLM STAT- MEDLINE DCOM- 19991117 LR - 20180925 IS - 0002-9513 (Print) IS - 0002-9513 (Linking) VI - 277 IP - 4 DP - 1999 Oct TI - Nitric oxide and renal nerve-mediated proximal tubular reabsorption in normotensive and hypertensive rats. PG - F560-6 LID - 10.1152/ajprenal.1999.277.4.F560 [doi] AB - In Inactin-anesthetized Wistar rats with an intact renal innervation, intratubular nitro-L-arginine methyl ester (L-NAME, 10(-4) M) increased proximal fluid uptake (J(va), at 2.47 +/- 0.61 x 10(-4) mm(3). mm(-2). s(-1)) by 17% (P < 0.05), whereas coadministration with sodium nitroprusside (SNP, 10(-4) M) decreased J(va) by 18% (P < 0.01). Similar manipulation of NO generation was without effect in groups of Wistar rats subjected to acute renal denervation. Intratubular aminoguanidine (10(-4) M), a selective inducible nitric oxide synthase (NOS) blocker, had no effect on J(va) in intact kidneys of Wistar rats, but the neuronal NOS (nNOS) blocker, 7-nitroindazole (10(-4) M and 10(-6) M) increased J(va) by 19-23% (both P < 0.001). In stroke-prone spontaneously hypertensive rats (SHRSP), J(va) values in the innervated kidneys were lower (P < 0.05) than in the corresponding Wistar groups and were unchanged by intratubular L-NAME or L-NAME plus SNP. The tonic attenuation of proximal epithelial transport by NO was dependent on the renal sympathetic nerves and appeared to be generated by the nNOS isoform of the enzyme. This role of NO was not evident in the SHRSP. FAU - Wu, X C AU - Wu XC AD - Department of Physiology, University of Birmingham, Birmingham B15 2TT, United Kingdom. FAU - Harris, P J AU - Harris PJ FAU - Johns, E J AU - Johns EJ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Am J Physiol JT - The American journal of physiology JID - 0370511 RN - 31C4KY9ESH (Nitric Oxide) RN - EC 1.14.13.39 (Nitric Oxide Synthase) RN - EC 1.14.13.39 (Nitric Oxide Synthase Type I) RN - EC 1.14.13.39 (Nos1 protein, rat) SB - IM MH - Absorption/physiology MH - Animals MH - Genetic Predisposition to Disease MH - Hypertension/genetics/*metabolism MH - Kidney/*innervation MH - Kidney Tubules, Proximal/*metabolism MH - Male MH - Nervous System/physiopathology MH - Nitric Oxide/*physiology MH - Nitric Oxide Synthase/physiology MH - Nitric Oxide Synthase Type I MH - Rats MH - Rats, Inbred SHR/genetics MH - Rats, Wistar MH - Reference Values MH - Stroke/genetics EDAT- 1999/10/12 00:00 MHDA- 1999/10/12 00:01 CRDT- 1999/10/12 00:00 PHST- 1999/10/12 00:00 [pubmed] PHST- 1999/10/12 00:01 [medline] PHST- 1999/10/12 00:00 [entrez] AID - 10.1152/ajprenal.1999.277.4.F560 [doi] PST - ppublish SO - Am J Physiol. 1999 Oct;277(4):F560-6. doi: 10.1152/ajprenal.1999.277.4.F560.