作者:Fengping Lv、Zhi-fang Li、Wenhao Hu、Xiaohua Wu
DOI:10.1016/j.bmc.2015.11.011
日期:2015.12
Alpha-dystroglycan (alpha-DG), a highly glycosylated receptor for extracellular matrix proteins, plays a critical role in many biological processes. Hypoglycosylation of alpha-DG results in various types of muscular dystrophies and is also highly associated with progression of majority of cancers. Currently, there are no effective treatments for those devastating diseases. Enhancing functional O-mannosyl glycans (FOG) of alpha-DG on the cell surfaces is a potential approach to address this unmet challenge. Based on the hypothesis that the cells can up-regulate FOG of alpha-DG in response to certain chemical stimuli, we developed a cell-based high-throughput screening (HTS) platform for searching chemical enhancers of FOG of alpha-DG from a large chemical library with 364,168 compounds. Sequential validation of the hits from a primary screening campaign and chemical works led to identification of a cluster of compounds that positively modulate FOG of alpha-DG on various cell surfaces including patient-derived myoblasts. These compounds enhance FOG of alpha-DG by almost ten folds, which provide us powerful tools for O-mannosylation studies and potential starting points for the development of drug to treat dystroglycanopathy. (c) 2015 Elsevier Ltd. All rights reserved.