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Abstract Title:

Nardostachys jatamansi extract protects against cytokine-induced beta-cell damage and streptozotocin-induced diabetes.

Abstract Source:

World J Gastroenterol. 2010 Jul 14 ;16(26):3249-57. PMID: 20614480

Abstract Author(s):

Mi-Young Song, Ui-Jin Bae, Bong-Hee Lee, Kang-Beom Kwon, Eun-A Seo, Sung-Joo Park, Min-Sun Kim, Ho-Joon Song, Keun-Sang Kwon, Jin-Woo Park, Do-Gon Ryu, Byung-Hyun Park

Article Affiliation:

Mi-Young Song

Abstract:

AIM: To investigate the anti-diabetogenic mechanism of Nardostachys jatamansi extract (NJE).

METHODS: Mice were injected with streptozotocin via a tail vein to induce diabetes. Rat insulinoma RINm5F cells and isolated rat islets were treated with interleukin-1beta and interferon-gamma to induce cytotoxicity.

RESULTS: Treatment of mice with streptozotocin resulted in hyperglycemia and hypoinsulinemia, which was confirmed by immunohistochemical staining of the islets. The diabetogenic effects of streptozotocin were completely abolished when mice were pretreated with NJE. Inhibition of streptozotocin-induced hyperglycemia by NJE was mediated by suppression of nuclear factor (NF)-kappaB activation. In addition, NJE protected against cytokine-mediated cytotoxicity. Incubation of RINm5F cells and islets with NJE resulted in a significant reduction in cytokine-induced NF-kappaB activation and downstream events, inducible nitric oxide synthase expression and nitric oxide production. The protective effect of NJE was further demonstrated by the normal insulin secretion of cytokine-treated islets in response to glucose.

CONCLUSION: NJE provided resistance to pancreatic beta-cell damage from cytokine or streptozotocin treatment. The beta-cell protective effect of NJE is mediated by suppressing NF-kappaB activation.

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