The core structure of a Dendrobium huoshanense polysaccharide required for the inhibition of human lens epithelial cell apoptosis
文献类型: 外文期刊
作者: Zha, Xue-Qiang 1 ; Deng, Yuan-Yuan 3 ; Li, Xiao-Long 2 ; Wang, Jing-Fei 2 ; Pan, Li-Hua 2 ; Luo, Jian-Ping 2 ;
作者机构: 1.Hefei Univ Technol, Sch Biol & Med Engn, 193 Tunxi Rd, Hefei 230009, Peoples R China
2.Hefei Univ Technol, Sch Biotechnol & Food Engn, 193 Tunxi Rd, Hefei 230009, Peoples R China
3.Guangdong Acad Agr Sci, Sericultural & Agri Food Res Inst, Guangdong Key Lab Agr Prod Proc, Lab Funct Foods,Minist Agr, Guangzhou 510610, Guangdong, Peoples R China
关键词: Dendrobium huoshanense;Polysaccharides;Core structure;Human lens epithelial cell;Apoptosis
期刊名称:CARBOHYDRATE POLYMERS ( 影响因子:9.381; 五年影响因子:8.678 )
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收录情况: SCI
摘要: The aim of this work was to investigate the core structure of a Dendrobium huoshanense polysaccharide DHPD1 required for the inhibition of lens epithelial cell apoptosis. In order to obtain the fragments containing the core domain, pectinase was employed to hydrolyze DHPD1. After 24h reaction, it is interesting that the hydrolyzation seemed to be stopped, leading to a final enzymatic fragment DHPD1-24 with molecular weight about 1552 Da. Compared to DHPD1, although the bioactivity is decreased, DHPD1-24 remained the ability to inhibit the H2O2-induced apoptosis of human lens epithelial (HLE) cells via suppressing the MAPK signaling pathways. These results suggested that DHPD1-24 might be the core domain required for DHPD1 to inhibit HLE cell apoptosis. Methylation analysis showed DHPD1-24 was composed of (1 -> 5)-linked-Araf, (1 -> 3,6)-linked-Manp, 1-linked-Glcp, (1 -> 4)-linked-Glcp, (1 -> 6)-linked-Glcp, (1 -> 4,6)-linked-Glcp, (1 -> 6)-linked-Galp and 1-linked-Xylp in a molar ratio of 1.06:1.53:2.11:2.04:0.93:0.91:0.36:1.01. Moreover, the primary structural features of DHPD1-24 were characterized by NMR spectrum. (C) 2016 Elsevier Ltd. All rights reserved.
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