Renal function of substance P in rats chronically exposed to hypoxia

Chau Fong Chen*, Li Wen Chen, Chiang-Ting Chien, Ming Shiou Wu

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

3 引文 斯高帕斯(Scopus)

摘要

Background: We studied the renal action of substance P (SP) in rats chronically exposed to hypoxia (high altitude, HA), compared to control rats kept at sea level (SL). Methods: Hypoxia was induced by placing female Wistar rats (182-225 g) in an altitude chamber (5500 m) 15 h · d-1 for 4 weeks. Results: Intrarenal arterial infusion of substance P (60 ng · kg-1 · h- 1) increased the excretion of urine, sodium in both groups of rats, however, the excretion of kallikrein (KK) and the glomerular filtration rate (GFR) were not significantly altered. After aprotinin (10,000 kiu · kg-1 · min-1) treatment, kallikrein was depleted and substance P lost its diuretic action. Spantide, an SP antagonist (6000 ng · kg-1 · h-1, I.V.) decreased urine, and urinary excretion of sodium and potassium in SL rats, but not in HA rats. Acute renal denervated diuresis in SL rats was not modified after Spantide administration. Finally, it was found that both SP and SP antagonist did not significantly change the renal parameters in either group of rats after chronic renal denervation. Conclusion: We made the following conclusions: a) endogenous renal action of SP was suggested in SL but not in HA rats; b) the renal action of SP might be through KK release, although urinary KK did not increase after SP administration; and c) SP action is renal nerve dependent in both groups of rats.

原文英語
頁(從 - 到)705-709
頁數5
期刊Aviation Space and Environmental Medicine
68
發行號8
出版狀態已發佈 - 1997 八月 1

ASJC Scopus subject areas

  • 公共衛生、環境和職業健康

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