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Abstract Title:

Identification of phenolics in litchi and evaluation of anticancer cell proliferation activity and intracellular antioxidant activity.

Abstract Source:

Free Radic Biol Med. 2015 Jul ;84:171-84. Epub 2015 Apr 7. PMID: 25857215

Abstract Author(s):

Lingrong Wen, Lijun You, Xiaoman Yang, Jiali Yang, Feng Chen, Yueming Jiang, Bao Yang

Article Affiliation:

Lingrong Wen

Abstract:

Litchi leaf is a good resource for phenolics, which are good candidates for medicines. In this work, three phenolics were isolated from litchi leaf by column chromatography. Their structures were identified by electrospray ionization-mass spectrometry (ESI-MS) and nuclear magnetic resonance (NMR) spectroscopy as secoisolariciresinol 9'-O-β-D-xyloside (1), 4,7,7',8',9,9'-hexahydroxy-3,3'-dimethoxy-8,4'-oxyneolignan (2), and cinnamtannin B1 (3). Cinnamtannin B1 showed better extra- and intracellular antioxidant activities than Compounds 1 and 2. The intracellular antioxidant activity of cinnamtannin B1 was related to the upregulationof endogenous antioxidant enzyme activities (superoxide dismutase, catalase, and glutathione peroxidase), and inhibition of ROS generation. Furthermore, cinnamtannin B1 exhibited strong antiproliferative effects against HepG2 and Siha cell lines with no significant cytotoxicities. In the case of the HepG2 cell line, cell cycle arrest and apoptosis induction were the underlying anticancer mechanisms of cinnamtannin B1. The results indicated that cinnamtannin B1 was a potent cancer cell proliferation inhibitor and a good intracellular antioxidant.

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Easy Turmeric recipes + The Dark Side of Wheat

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