ABSTRACT
Objective: To compare pharmacodynamic difference of Ribes diacanthum (RDP) and Ribes mandshuricum (RMK) treatment on renal fibrosis in vivo and in vitro. Methods: Both of TGFβ1-induced HK-2 cell fibrosis model and UUO-induced kidney fibrosis mice model were used in the present study. The cell morphology, ratio of cell length to width, renal histopathology, protein expressions of α-SMA and E-cadherin in kidney tissues were evaluated through biological and pharmacological methods and technologies, including Western blot, immunohistochemistry, HE staining, Masson staining and so on. In addition, partial least squares-discriminant analysis (PLS-DA) was applied to analyze the renal histopathological score as well. Results: RDP (1.5, 5, 15 μg/mL) and RMK (3, 10 μg/mL) effectively improved morphological changes and reduced the ratio of cell length to width in TGFβ1-induced HK-2 cell fibrosis; Moreover, RDP (40 mg/kg) and RMK (80 mg/kg) remarkably decreased the expression of α-SMA and increased the expression of E-cadherin in UUO mice model. The degree of pathological damage and fibrosis were also alleviated in both groups. PLS-DA analysis showed no significant difference in anti-fibrotic effects between RDP and RMK treatment. Conclusion: Both RDP and RMK have anti-fibrosis effects on TGFβ1-induced HK-2 cell fibrosis model and UUO-induced kidney fibrosis mice model, and there is no significant difference between these two herbs.
ABSTRACT
Introduction: Ribes diacanthum Pall. (Saxifragaceae), a Mongolian folk medicinal plant, aqueous extract of its aerial parts (leaves, stems, fruits) has been used to treat urinary system diseases. It has been reported that the aqueous extract of RDP can control kidney stones and stimulate the diuretic effect. Some chemical studies showed that ethyl acetate extract of RDP exhibits significant ability of scavenging free radicals. However, to date, the nephroprotective effects of RDP on animal models have not been investigated. Purpose: The present work aimed to investigate the protective effects of different doses of Ribes diacanthum Pall (RDP) against cisplatin-induced nephrotoxicity in mice. Materials and methods: The renal injury was modeled by intraperitoneal injection of cisplatin for 5 consecutive days (5 mg/kg). Nephroprotection of RDP was investigated by oral administration of different doses of RDP aqueous extract at a daily dose of 10 mg/kg, 20 mg/kg and 40 mg/kg for 14 consecutive days, starting 7 days prior to cisplatin administration. Results: We demonstrated that pretreatment with different doses of RDP aqueous extract significantly reduced blood urea nitrogen (BUN) and serum creatinine (Cr) levels and histophatological changes observed in cisplatin-administrated mice. Conclusion: These data suggested that RDP might be a potential candidate for neoadjuvant chemotherapy of cisplatin. The dose of RDP 40 mg/kg was the most effective.
ABSTRACT
OBJECTIVE: To investigate the chemical constituents of the aerial parts of Ribes diacanthum Pall. METHODS: The compounds were isolated and purified by silica gel, Sephadex LH-20 colunm chromatography and HPLC. The structures were elucidated on the basis of spectral data and physiochemical properties. RESULTS: Nineteen compounds were isolated from 95% ethanol extracts and identified as quercetin (1), quercetin-3-O-β-D-glucopyranoside (2), quercetin-3-O-α-L-rhamnopyranoside (3), quercetin-3-O-β-D-neohesperoside (4), mearnsetin (5), myricetin-3-O-α-L-rhamnoside (6), myricetin-3-O-β-D-glucopyranoside (7), mearnsetin 3-O-β-D-glucopyranoside (8), mearnsetin 3-O-α-L-rhamnopyranoside (9), kaempferol-3-O-β-D-glucopyranoside (10), kaempferol 3-O-β-D-(2-O-α-L-rhamnopyranosyl) glucopyranoside (11), kaempferol 3-(2'', 6''-di-O-α-L-rhamnosyl)-β-D-glucoside (12), 1, 2, 4-trihydroxybenzene (13), vanillic acid (14), protocatechuic acid (15), 4-hydroxy benzoic acid (16), gallic acid (17), blumenol C glucoside (18), conocarpan (19). CONCLUSION: All the compounds are isolated from the title plant and the NMR data for 8 is reported here for the first time.