Anti-tumor effects of proteoglycan from Phellinus linteus by immunomodulating and inhibiting Reg IV/EGFR/Akt signaling pathway in colorectal carcinoma

文献类型： 外文期刊

第一作者： Li, You-Gui

作者： Li, You-Gui;Ji, Dong-Feng;Zhong, Shi;Zhu, Jian-Xun;Chen, Shi;Hu, Gui-Yan

作者机构：

关键词： Akt;EGFR;Phellinus linteus;PIgR;Proteoglycan;Reg IV

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：6.953； 五年影响因子：6.737 ）

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年卷期：

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收录情况： SCI

摘要： Proteoglycan (P1) purified from Phellinus linteus has been reported to have anti-disease activities. The objectives of our research were to determine the anti-tumor effect and possible mechanisms of P1 on human cancer cells. Cell inhibition assay showed that P1 has an antiproliferative effect on HepG2, HT-29, NCI-H 460 and MCF-7 human colon cancer cells, especially it was very effective in inhibiting HT-29 cells. When HT-29-bearing mice were treated with P1(100. mg/kg), there was relative increase in spleen and thymus weights, the plasmatic pIgR and IgA levels were significantly increased, also there was a notable decrease in plasmatic PGE2, Reg IV, EGFR and Akt concentrations measured by ELISA. RT-PCR analysis suggested that P1-induced HT-29 apoptosis appeared to be associated with a decrease in the levels of expression of Reg IV and EGFR. These results suggest that P1 might have two potential roles in treating cancer; it acts as an immunopotentiator partly through protecting T cells from escaping PGE2 attack and enhancing the mucosal IgA response, and as a direct inhibitor by disrupting the Reg IV/EGFR/Akt signaling pathway.

分类号： Q71

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