Renal modulation of electrically stimulated adrenal medullary secretion.
Renal modulation of electrically stimulated adrenal medullary secretion.
复制标题
电刺激肾上腺髓质分泌的肾脏调节。
DOI:
10.1016/0022-4804(84)90082-9
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发表时间:
1984
期刊:
影响因子:
--
通讯作者:
Harrison,TS
中科院分区:
文献类型:
--
作者:
Badder,EM;Duarte,B;Seaton,JF;Harrison,TS
In acutely anephric dogs, depressed reflex adrenal medullary secretion (AMS) may be related to low plasma angiotensin. Either local (adrenal medulla) or central nervous system mechanisms are responsible. Local influences of acute bilateral nephrectomy on AMS were evaluated after left splanchnic nerve section. Two groups of five healthy, fasted mongrel dogs (16–20 kg) were prepared (Na pentobarbital iv anesthesia, 98% O2/2% CO2, Harvard volume ventilator) at celiotomy with blood pressure and sampling catheters per femoral arteriotomies and left adrenal-femoral venous T-shaped Silastic shunt. Group 2 dogs had acute bilateral nephrectomy. The acutely divided distal left splanchnic nerve was arranged for electrical stimulation (Grass, bipolar nerve stimulator, 10 V, 1-msec delay, 10 Hz, 10-msec square wave). Heparin anticoagulation was maintained and arterial pH monitored. Simultaneous adrenal vein, aortic blood sampling, and adrenal blood flow (F) determinations followed 10-min periods of alternating electrical stimulation and nerve rest. AMS for epinephrine (E) and norepinephrine (NE) was calculated [E and NE plasma concentration (single isotope radioenzymatic technique) differences of adrenal vein minus aorta multiplied by F]. Results were grouped, analyzed for variance, and compared (Wilcoxon unpaired rank sum, Student'sttest, Fischer's tables, ANOVA). Low aortic E, NE concentrations confirmed absent systemic adrenergic stimulation. The AMS ratio of NE:E was low in the anephric group. At the first stimulation interval NE:E was 0.28 ± 0.14 (1 SD) in renal intact dogs vs 0.11 ± 0.04 in anephric dogs,P< 0.05. At rest NE:E was 0.33 ± 0.12 in group 1 vs 0.17 ± 0.02 in group 2 dogs,P< 0.02. Plasma NE was also low in the anephric group (289 mg/liter ± 126 (1 SD) vs 612 ± 189,P= 0.033, resting). This study indicates suppressed plasma NE and relative suppression of AMS of NE in anephric dogs after acute nephrectomy but maintenance of E secretion during electrical stimulation of the divided splanchnic nerve. These results suggest that angiotensin modulates locally the relative proportions of AMS of catecholamines and are consistent with more important AII modulation of sympathetic activity at the CNS level.
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DOI:
--
发表时间:
2010
期刊:
Nursing Standard
影响因子:
--
作者:
D. Gencheva
通讯作者:
D. Gencheva
影响因子:
3.2
作者:
K. Wood;J. Ogden
通讯作者:
J. Ogden
影响因子:
56.9
作者:
Hill, JO;Peters, JC
通讯作者:
Peters, JC
影响因子:
3.8
作者:
Jensen, Janet F.;Petersen, Mette H.;Midtgaard, Julie
通讯作者:
Midtgaard, Julie
影响因子:
4.2
作者:
Gilmartin, Jo
通讯作者:
Gilmartin, Jo