Abstract

Antiurolithiatic acitivity of magnesium lactate gluconate (MLG) and aqueous extract of Garcinia cambogia (GC) fruit was studied. Methods: Study was performed during December 2016 to April 2017. Urolithiasis was induced in male Wistar rats by administration of 0.75 % v/v ethylene glycol for 21 days. From 8th day onwards, intervention with MLG (200 and 400 mg/kg b.w.) and GC (100 and 200 mg/kg b.w.) was started. At the end of treatment period, biochemical parameters affecting renal stone formation were estimated in serum, urine, kidney homogenate and histopathology of harvested kidneys was performed. Results: From in vivo evaluation, it was observed that MLG 400 mg/kg b.w., GC 100 mg/kg b.w. and GC 200 mg/kg b.w. significantly reduced nitrogenous waste products in serum (blood urea nitrogen, creatinine, uric acid) as well as calculogenic promoters in urine (phosphate, oxalate) and kidney homogenate (calcium, phosphate, oxalate) when compared to disease control animals. The MLG 200 and MLG 400 were ineffective in restoring superoxide dismutase (SOD) and catalase (CAT) enzyme activity whereas GC 100, GC 200 and Cystone® 400 mg/kg b.w. significantly elevated SOD and CAT enzymes in urolithiatic rat kidney. Conclusions: MLG and GC extract are capable of preventing calcium oxalate (CaOx) crystal formation and subsequent deposition in renal tubules. The principle mechanism underlying nephroprotective effect of test drugs might be attributed to their calcium ion cheating ability and CaOx crystallization inhibitory activity. It is further asserted that GC was more potent than MLG in overall kidney protection by virtue of its antioxidant potential.

Key words: urolithiasis, hyperoxaluria, ethylene glycol, kidney stone, magnesium lactate gluconate, garcinia cambogia