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Nephroprotective effect of Corn Silk extract on oxalic acid-induced nephrocalcinosis in rabbit model

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Author(s): Faruk Hassan Al-Jawad | Rafi Abdul Majeed Al-Razzuqi | Zainab Awaen Al-Ebady | Thulfuqar Abdul Majeed Al-Razzuqi

Journal: Journal of Intercultural Ethnopharmacology
ISSN 2146-8397

Volume: 1;
Issue: 2;
Start page: 75;
Date: 2012;
Original page

Keywords: Nephrocalcinosis | Oxalic acid | Renal tubular acidosis | Saponins | Zea Mays

ABSTRACT
ABSTRACT Background : Nephrocalcinosis is a state of deposition of calcium phosphate or oxalate in the renal parenchyma. It may occur in patients with renal tubular acidosis, vitamin D intoxication, and hyperparathyroidism. Corn silk was used in traditional Chinese medicine to relieve renal pains. Aim: To evaluate the effect of Corn silk aqueous extract in reducing calcium deposits from renal parenchyma in oxalic acid-induced nephrocalcinosis model. Materials and methods: Fourteen healthy rabbits were allocated to two groups. Two hours before induction of nephrocalcinosis, one group received water and the other received aqueous extract of corn silk and continued feeding for ten days. Blood samples were collected for biochemical analysis before induction and in the fifth and tenth post-induction day. Urine samples were taken to estimate urinary ca+2 levels and crystals. The histopathological examination was carried to check for crystal deposits in renal tissues. Results: Corn silk aqueous extract produced a significant reduction of blood urea nitrogen(5.2±0.08 vs 7.3±0.2) mmol/l, serum creatinine (85.9±0.2 vs 97.3±0.5) mmol/l and serum Na+ levels (137±0.2 vs 142.16±0.7) mmol/l with non-significant reduction in serum K+ (4.0±0.02 vs 4.2±0.05). There is a significant reduction in calcium deposition in renal parenchyma in comparison to the control group after ten days of treatment. Conclusion: Corn silk had a significant diuretic effect that accelerates the excretion of urinary calcium. [J Intercult Ethnopharmacol 2012; 1(2.000): 75-78]
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