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  • Title: Failure of saralasin in preventing renal failure in ischemic transplanted kidneys.
    Author: Munda R, Alexander JW.
    Journal: Am Surg; 1980 Nov; 46(11):637-9. PubMed ID: 7001966.
    Abstract:
    Many potential cadaveric kidney donors have been exposed to shock or hypotension before or during organ donation. Renin-mediated vasoconstriction has been implied in the pathogenesis of acute renal failure. High renin levels have been associated with poor graft survival under hypothermic pulsatile perfusion. An attempt was made to block renin effect with Saralasin (1-Sar-8-ala-angiotensin II), a competitive blocker. Eight conditioned mongrel dogs had their renal arteries exposed, and Saralasin, 100 microgram, was injected intra-arterially. Warm ischemia was then induced for 30 min. Thereafter, the kidney was removed and placed under hypothermic pulsatile perfusion for 24 hours, during which time Saralasin was given continuously at a rate of 1 microgram/min. The kidneys were reimplanted in the same animal on the contralateral iliac fossa, Saralasin, 100 microgram, was given intraarterially after implantation, and a contralateral nephrectomy was performed. Four control animals were given saline solution instead of Saralasin. No significant differences were noted in perfusion characteristics and postoperative creatinine values between treated and control groups. This apparent lack of protective effect of angiotensin II competitive blocker suggests that in the pathophysiology of acute renal failure other factors could be involved besides renin release.
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