Natural CAC Chemopreventive Agents from Ilex Rotunda Thunb

Overview

Journal J Nat Med

Publisher Springer

Date 2019 Feb 14

PMID 30758715

Citations 5

Authors

Yueqing Han

Lin Zhang

Wei Li

Xinran Liu

Jiao Xiao

Gang Chen

Ning Li

Affiliations

Soon will be listed here.

Abstract

Colitis-associated cancer (CAC) is one of the most serious complications of inflammatory bowel disease. The pathogenesis of CAC is complicated and so far elusive, and the anti-inflammatory effect does not assure CAC preventive activity, making it difficult to discover CAC preventive drugs. In this study, we report the CAC preventive effect of the ethyl acetate (EIR) of Ilex rotunda Thunb., a traditional Chinese herbal medicine being clinically used to treat intestinal disease. We also report the results of screening for CAC preventive agents from EIR via a nuclear factor-kappa B (NF-κB) translocation model in Caco2 cells, since activated NF-κB can be used by tumor cells at the early stage of tumorigenesis. Twenty-four components were isolated from EIR and identified by multiple chromatography and spectral analysis. MTT experiments in IEC-6 and RAW264.7 cells showed that all 24 compounds were toxic-free to normal cell lines. Furthermore, compound rotundic acid (RA) (19) exhibited an inhibitory effect on LPS-induced NF-κB translocation in Caco2 cells. Moreover, RA did not induce apoptosis in Caco2 tumor cells while possessing an anti-inflammatory effect both in immune and intestinal epithelium cells (RAW264.7 and IEC-6 cells, respectively). Removing RA (19) and its 28-O-glucopyranoside (17) from EIR definitely undermined the in vivo CAC preventive activity of EIR. Therefore, the current study suggested that RA (19) could be a potential therapeutic agent against CAC.

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