Abstract
Ischemia and subsequent reperfusion are known to impair renal function. We examined several agents that might prevent renal impairment or enhance the recovery of renal function after ischemia/reperfusion injury in rats. Different degrees of preventive effects were observed in rats treated with captopril, BQ-123 (endothelin type A receptor antagonist), sodium nitroprusside (SNP, a nitric oxide donor), and losartan (angiotensin II type 1 receptor antagonist). Only minimal changes in renal morphology were observed after treatment with losartan, SNP, captopril, and BQ-123 compared with control animals. On the other hand, lesions were prominent in the N(G)-nitro-L-arginine-methyl ester (L-NAME)- and L-arginine-treated rats. The Na(+)-K(+) ATPase activity of ischemic kidneys was, however, preserved in all treatment groups, except in those treated with L-arginine and L-NAME, which showed a marked reduction in Na(+)-K(+) ATPase activity. Our post-treatment data suggest that losartan and SNP have the greatest potential for therapeutic use to mitigate post-ischemic renal damage and functional impairment.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Adenosine Triphosphatases / metabolism
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Angiotensin II / blood
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Angiotensin II Type 1 Receptor Blockers / pharmacology
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Angiotensin II Type 1 Receptor Blockers / therapeutic use*
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Animals
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Arginine / pharmacology
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Captopril / pharmacology
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Ischemia / complications
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Ischemia / drug therapy
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Kidney / drug effects*
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Kidney / metabolism
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Kidney / pathology
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Losartan / pharmacology
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Losartan / therapeutic use*
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Male
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NG-Nitroarginine Methyl Ester / pharmacology
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Nitric Oxide Donors / pharmacology
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Nitric Oxide Donors / therapeutic use*
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Nitroprusside / pharmacology
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Nitroprusside / therapeutic use*
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Peptides, Cyclic / pharmacology
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Rats, Wistar
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Renal Insufficiency / metabolism
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Renal Insufficiency / prevention & control*
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Reperfusion
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Reperfusion Injury / complications
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Reperfusion Injury / drug therapy*
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Reperfusion Injury / metabolism
Substances
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Angiotensin II Type 1 Receptor Blockers
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Nitric Oxide Donors
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Peptides, Cyclic
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Angiotensin II
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Nitroprusside
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Arginine
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Captopril
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Adenosine Triphosphatases
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Losartan
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cyclo(Trp-Asp-Pro-Val-Leu)
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NG-Nitroarginine Methyl Ester