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Abstract Title:

Protective effect of Coptidis Rhizoma on S-nitroso-N-acetylpenicillamine (SNAP)-induced apoptosis and necrosis in pancreatic RINm5F cells.

Abstract Source:

Life Sci. 2005 Jan 7;76(8):917-29. PMID: 15589968

Abstract Author(s):

Kang-Beom Kwon, Eun-Kyung Kim, Jung-Gook Lim, Byung-Cheul Shin, Sang-Chil Han, Bong-Keun Song, Kang-San Kim, Eun-A Seo, Do-Gon Ryu

Abstract:

Coptidis rhizoma (CR) is a herb used in many traditional prescriptions against diabetes mellitus in Asia for centuries. Our purpose was to determine the protective effect and its action mechanism of CR on the cytotoxicity of pancreatic beta-cells. Nitric oxide (NO) is believed to play a key role in the process of pancreatic beta-cell destruction leading to insulin-dependent diabetes mellitus (IDDM). Exposure of RINm5F cells to chemical NO donor such as S-nitroso-N-acetylpenicillamine (SNAP) induced apoptotic events such as the disruption of mitochondrial membrane potential (Deltapsim), cytochrome c release from mitochondria, activation of caspase-3, poly (ADP-ribose) polymerase cleavage and DNA fragmentation. Also, exposure of SNAP led to LDH release into medium, one of the necrotic events. However, pretreatment of RINm5F cells with CR extract protected both apoptosis and necrosis through the inhibition of Deltapsim disruption in SNAP-treated RINm5F cells. In addition, rat islets pretreated with CR extract retained the insulin-secretion capacity even after the treatment with IL-1beta. These results suggest that CR may be a candidate for a therapeutic or preventing agent against IDDM.

Study Type : In Vitro Study

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Sayer Ji
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