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Depression: 21st Century Solutions + The Dark Side of Wheat

Abstract Title:

Resveratrol-induced cytotoxicity in human Burkitt's lymphoma cells is coupled to the unfolded protein response.

Abstract Source:

BMC Cancer. 2010;10:445. Epub 2010 Aug 20. PMID: 20723265

Abstract Author(s):

Ying Yan, Yan-Yan Gao, Bao-Qin Liu, Xiao-Fang Niu, Ying Zhuang, Hua-Qin Wang

Article Affiliation:

Department of Biochemistry&Molecular Biology, China Medical University, Shenyang 110001, China.

Abstract:

BACKGROUND: Resveratrol (RES), a natural phytoalexin found at high levels in grapes and red wine, has been shown to induce anti-proliferation and apoptosis of human cancer cell lines. However, the underlying molecular mechanisms are at present only partially understood.

METHOD: The effects of RES on activation of unfolded protein responses (UPR) were evaluated using Western blotting, semi-quantitative and real-time RT-PCR. Cell death was evaluated using Annexin V/PI staining and subsequent FACS.

RESULTS: Similar as tunicamycin, treatment with RES lead to the activation of all 3 branches of the UPR, with early splicing of XBP-1 indicative of IRE1 activation, phosphorylation of eIF2alpha consistent with ER resident kinase (PERK) activation, activating transcription factor 6 (ATF6) splicing, and increase in expression levels of the downstream molecules GRP78/BiP, GRP94 and CHOP/GADD153 in human Burkitt's lymphoma Raji and Daudi cell lines. RES was shown to induce cell death, which could be attenuated by thwarting upregulation of CHOP.

CONCLUSIONS: Our data suggest that activation of the apoptotic arm of the UPR and its downstream effector CHOP/GADD153 is involved, at least in part, in RES-induced apoptosis in Burkitt's lymphoma cells.

Study Type : In Vitro Study

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Sayer Ji
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Depression: 21st Century Solutions + The Dark Side of Wheat

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