Shudo C, Masuda Y, Sugita H, Tanaka S, Tomita K. Effects of efonidipine hydrochloride (NZ-105), a new calcium antagonist, against acute renal failure in rats.
GENERAL PHARMACOLOGY 1994;
25:1451-8. [PMID:
7896060 DOI:
10.1016/0306-3623(94)90173-2]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
1. We investigated the effect of efonidipine hydrochloride (NZ-105) against acute renal failure (ARF) in male Wistar rats. ARF was produced by ischemia or glycerol. 2. Ischemia-induced ARF was produced by right nephrectomy and clamping of the left renal artery for 60 min, followed by reperfusion. NZ-105 (20 mg/kg) was orally administered twice a day for 3 days before ARF. The plasma creatinine and urea nitrogen concentrations were markedly elevated in the ischemia ARF group on the 1st day, but the elevation was significantly suppressed by NZ-105 treatment. 3. Glycerol-induced ARF was produced by intramuscular injection of 50% (v/v) glycerol (10 ml/kg) in rats which were restricted to drinking water for 24 hr. NZ-105 (20 mg/kg) was orally administered twice a day for 3 days before ARF. NZ-105 significantly attenuated the severe impairment of creatinine and urea nitrogen clearances and the elevated fractional sodium excretion (FENa) caused by ARF. 4. In the kidney homogenate, NZ-105 (10(-6)-10(-4) M) inhibited lipid peroxidation induced by ascorbic acid and Fe or by NADPH and the inhibitory effect of NZ-105 was stronger than alpha-tocopherol, an antioxidant agent. NZ-105 (10(-5)-10(-3) M) showed radical scavenging action against diphenyl-p-picrylhydrazyl and galvinoxyl induced radicals. 5. These findings suggest that NZ-105 prevents the renal damage caused by the two kinds of ARF. Moreover, the inhibitory effects of NZ-105 against lipid peroxidation and radical formation may be one of the mechanisms involved in the prevention of ARF.
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