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BACKGROUND Renal stones are the accumulated or deposited crystals that form and appear in supersaturated urine. This study aimed to the investigate the therapeutic effects of Huashi Pill on clearance of renal stones. MATERIAL AND METHODS Sprague Dawley rats were divided into normal control, positive control, low-dosage Huashi Pill, medium-dosage Huashi Pill, and high-dosage Huashi Pill groups. A renal rat model was established by using ethylene glycol, ammonium chloride, and calcium gluconate. The urinary pH, urine protein, and uric acid levels, as well as the calcium, magnesium, and phosphorus levels were examined. The blood urea nitrogen (BUN) and creatinine (Cr) levels were also evaluated. Aspartate aminotransferase (AST), alanine aminotransferase (ALT), and total bilirubin (TBIL) levels were evaluated. Crystal formation and calcium deposits were examined using hematoxylin and eosin (H and E) staining and von Kossa staining, respectively. Osteopontin (OPN) expression was evaluated with quantitative real-time polymerase chain reaction assay and immunohistochemical assay. RESULTS A renal stone rat model was successfully established. Huashi Pill significantly improved water and food intake and enhanced pH value of urine (P&lt;0.05). Huashi Pill significantly improved the liver functions by decreasing ALT and TBIL levels (P&lt;0.05). Huashi Pill regulated the amounts of microelements. Huashi Pill significantly decreased the urine protein, uric acid, and Cr levels (P&lt;0.05). Huashi Pill inhibited formation of stone crystals and reduced the insoluble calcium deposition. Huashi Pill significantly downregulated expression of OPN in the kidney tissues of renal rat models (P&lt;0.05). CONCLUSIONS Huashi Pill inhibited stone formation by regulating urine biochemical indexes and reducing OPN expression in kidney tissue in a renal stone rat model.

Inhibitive Effects of Huashi Pill on Formation of Renal Stones by Modulating Urine Biochemical Indexes and Osteopontin in Renal Stone Rat Models