Hoecherl, Klaus and Kammerl, M. and Kees, Frieder and Kraemer, Bernhard K. and Grobecker, H. F. and Kurtz, Armin (2002) Role of renal nerves in stimulation of renin, COX-2, and nNOS in rat renal cortex during salt deficiency. AMERICAN JOURNAL OF PHYSIOLOGY-RENAL PHYSIOLOGY, 282 (3). F478-F484. ISSN 1931-857X
Full text not available from this repository. (Request a copy)Abstract
We investigated a possible involvement of the sympathetic nervous system in the parallel increase of renin, cyclooxygenase-2 (COX-2), and neuronal nitric oxide synthase (nNOS) gene expression in the juxtaglomerular apparatus of rat kidneys induced by salt deficiency. Therefore, we determined the effects of renal denervation and the beta-adrenoreceptor antagonist metoprolol (50 mg/kg body wt po, twice a day) on renocortical expression of renin, COX-2, and nNOS in rats fed a low-salt (0.02% wt/wt) diet or treated for 1 wk with ramipril (10 mg/kg body wt) in combination with a low-salt diet. We found that a low-salt diet in combination with ramipril strongly increased renocortical mRNA levels of renin, COX-2, and nNOS 9-, 7-, and 2.5- fold, respectively. Treatment with metoprolol did not change basal expression of the three genes or induction of renin and COX-2 gene expression, while induction of nNOS expression was clearly attenuated. Similarly, unilateral renal denervation attenuated induction of nNOS expression but had no effect on all other parameters. These findings suggest that beta-adrenergic stimulation is not required for stimulation of renin and COX-2 gene expression in the juxtaglomerular apparatus during salt deficiency. However, beta-adrenoreceptor activity or renal nerve activity appears to be required for the full stimulation of nNOS expression by low salt intake or combined with angiotensin-converting enzyme inhibition.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NITRIC-OXIDE SYNTHASE; MACULA DENSA; CYCLOOXYGENASE-2 EXPRESSION; RENOVASCULAR HYPERTENSION; KIDNEY; INHIBITION; PRESSURE; SYSTEM; PROSTAGLANDINS; SECRETION; cyclooxygenase-2; kidney; renal nerves; neuronal nitric oxide synthase |
| Subjects: | 500 Science > 570 Life sciences 600 Technology > 610 Medical sciences Medicine 600 Technology > 615 Pharmacy |
| Divisions: | Medicine > Lehrstuhl für Innere Medizin II Biology, Preclinical Medicine > Institut für Physiologie > Prof. Dr. Armin Kurtz Chemistry and Pharmacy > Institute of Pharmacy > Alumni or Retired Professors > Prof. Frieder Kees |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Nov 2021 08:05 |
| Last Modified: | 08 Nov 2021 08:05 |
| URI: | https://pred.uni-regensburg.de/id/eprint/40479 |
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