Abstract Title:

Characterization of the anti-diabetic and antioxidant effects of rehmannia glutinosa in streptozotocin-induced diabetic Wistar rats.

Abstract Source:

Am J Chin Med. 2008;36(6):1083-104. PMID: 19051338

Abstract Author(s):

Viduranga Y Waisundara, Meiqi Huang, Annie Hsu, Dejian Huang, Benny Kwong-Huat Tan

Abstract:

This study investigated the effects of Rehmannia glutinosa individually as well as in combination with the oral hypoglycemic agent, metformin in streptozotocin (STZ)-induced diabetic Wistar rats. R. glutinosa ethanolic extract was prepared and the constituents were characterized using fractionation by column chromatography, followed by high performance liquid chromatography-mass spectrometry. STZ (65 mg/kg) was injected intraperitoneally to induce diabetes in Wistar rats. The diabetic rats were divided into the following groups (each n = 6) and received the respective treatments for 30 days: (1) metformin (500 mg/kg), (2) R. glutinosa (200 mg/kg), (3) metformin (500 mg/kg) and R. glutinosa (200 mg/kg) and (4) diabetic control (DC). A reduction in plasma glucose levels caused by the herb was not as significant as metformin compared to the diabetic control (p < 0.05). However, R. glutinosa-treated group showed reductions in plasma C-reactive protein (CRP) levels compared to the diabetic controls (p < 0.05) as well as metformin-treated group (p < 0.05). An enhanced reduction in CRP concentration was observed in the group receiving both herb and metformin compared to metformin-treated group (p < 0.05). Reduction in CRP levels suggests an anti-inflammatory activity of the herb.

Study Type : Animal Study

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