期刊
CARBOHYDRATE POLYMERS
卷 154, 期 -, 页码 231-240出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.08.059
关键词
Apoptosis; Antitumor activity; Lentinus giganteus; Polysaccharide; Structural characterization
资金
- National Natural Science Foundation of China [31401616]
- Specialized Research Fund for the Doctoral Program of Higher Education [20133515120016]
- Funds for Distinguished Young Scientists [xjq201418]
- University-Industry Cooperation Project in Fujian Province [2015N5001]
- Scientific and Technological Innovation Team Support Plan of FAFU [cxtd12009]
- High Level University Construction Project of FAFU [612014042]
A novel neutral polysaccharide (LGPS-1), with a molecular weight of 1.547 x 10(5) Da, was isolated from Lentinus giganteus by precipitation and purification. The monosaccharides included o-mannose (Man), D-glucose (Glc) and D-galactose (Gal) with a molar ratio of 3.0:4.1:7.1. The backbone of LGPS-1 was composed of 1,6-Galp and 1,3,6-Manp whereas the branches were composed of 1,6-Glcp and 1-Glcp. The anticancer efficacy of LGPS-1 was assessed using HepG2 hepatocellular carcinoma cells. The results showed that LGPS-1 inhibited the proliferation of HepG2 cells and also induced the activation of caspase-3, and cleavage of PARP-1. Western blot analysis revealed that LGSP-1 significantly induced a loss of mitochondrial membrane potential (Delta ym), increased the ratio of Bax/Bcl-2, promoted the release of cytochrome c into cytoplasm as well as inhibited the phosphorylation of Akt in HepG2 cells. These findings suggest that LGPS-1 induced apoptosis in HepG2 cells through intrinsic mitochondrial apoptosis and PI3K/Akt signaling pathways. (C) 2016 Elsevier Ltd. All rights reserved.
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