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Nephron. 2002 Oct;92(2):399-406.

Effect of oral adsorbent (AST-120) on renal function, acquired renal cysts and aortic calcification in rats with adriamycin nephropathy.

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  • 1Division of Nephrology, Department of Internal Medicine, Kanazawa Medical University, Uchinada, Kahoku, Ichikawa 920-0293, Japan. isikawai@kanazawa-med.ac.jp

Abstract

AIMS:

The effect of oral adsorbent, AST-120, on the experimental renal disease induced by adriamycin, uninephrectomy and high protein diet proposed as a model of acquired cystic disease of the kidney was investigated.

METHODS:

3 mg of adriamycin was injected into the tail vein of rats and 4 weeks later right-side nephrectomy was performed, 2 weeks thereafter 26 rats with urinary protein excretion between 100 and 358 mg/day were selected from 60 rats. Two groups, 13 rats in each group, namely the AST-120-treated group and control group, both of which had equal renal damage before the administration of AST-120 or placebo. AST-120 (0.4 g/100 g BW/day) was administered for 19 weeks.

RESULTS:

Serum creatinine and BUN in the AST-120-treated group were significantly lower (serum creatinine: 3.3 +/- 2.1 vs. 7.1 +/- 2.7 mg/dl, p < 0.003) and creatinine clearance was higher (0.62 +/- 0.49 vs. 0.29 +/- 0.30 ml/min, p < 0.05) at the final examination than in the control group. Survival rate which was examined using another set of 9 rats was higher in AST-120-treated rats than in AST-120-untreated rats. Serum indoxyl sulfate was significantly lower at all times after using AST-120 in the AST-120-treated group than in contrast to the control group. Histological examination revealed less severe interstitial and cystic changes in the AST-120-treated group. This suggests that AST-120 can prevent or retard the development of acquired renal cystic disease in this model. Aortic calcification tended to be less severe in the AST-120-treated group because of less serum Ca x P products.

CONCLUSION:

The AST-120-treated group significantly decreased serum creatinine and increased creatinine clearance with less severe renal cystic changes in this model during the later weeks of administration of AST-120 or at death, accompanied with the tendency of less severe aortic calcification.

Copyright 2002 S. Karger AG, Basel

PMID:
12218320
[PubMed - indexed for MEDLINE]
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