Chondroitin sulfate proteoglycans inhibit the migration and differentiation of oligodendrocyte precursor cells and its counteractive interaction with laminin

Sun,Yi; Deng,Yingping; Xiao,Mili; Hu,Lan; Li,Zhihua; Chen,Chao

doi:10.3892/ijmm.2017.3153

Chondroitin sulfate proteoglycans inhibit the migration and differentiation of oligodendrocyte precursor cells and its counteractive interaction with laminin

Authors:
- Yi Sun
- Yingping Deng
- Mili Xiao
- Lan Hu
- Zhihua Li
- Chao Chen
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Affiliations: Department of Neonatology, Children's Hospital of Fudan University, Shanghai 201102, P.R. China
Published online on: September 27, 2017 https://doi.org/10.3892/ijmm.2017.3153
Pages: 1657-1668
Copyright: © Sun et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Cerebral white matter injury (WMI) is a recognized problem in premature infants, particularly in those with very low birth weights. Although the survival rate of premature infants has notably increased due to the advancement of modern medical treatments, their likelihood of developmental disability is higher than infants with an average birth weight. It has been previously reported that oligodendrocyte precursor cells (OPCs) are selectively vulnerable to WMI in premature infants. Following brain injury, glial scars may develop within the white matter. Their main constituent is chondroitin sulphate proteoglycans (CSPGs), revealing a potential association between CSPGs and OPCs. In the present study rat OPCs were cultured in vitro, and the effect of CSPGs on the proliferation, migration and differentiation of OPCs was determined. It was revealed that CSPGs did not affect proliferation, but they did inhibit the migration and differentiation of OPCs. It was also identified that the inhibitory effect of CSPGs was counteracted by laminin. Factor analysis revealed that CSPGs and laminin served interactive roles in OPC differentiation. The effect of CSPGs on OPCs was associated with the downregulation of β1-integrin, indicating that CSPGs potentially competitively inhibit the β1-integrin signaling pathway. Collectively, these results suggest that CSPGs serve a role as inhibitors of OPC differentiation and migration, as well as indicating an interaction between CSPGs and laminin. The present study has revealed a potential novel therapeutic target for WMI in premature infants, and identified β1-integrin signaling as a pathological mechanism for dysfunctional myelination in white matter.

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