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Lipopolysaccharide Upregulates the Expression of CINC-3 and LIX in Primary NG2 Cells

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Abstract

Numerous NG2 cells, also called oligodendrocyte progenitor cells (OPCs), exist ubiquitously in the gray and white matter in the adult central nervous system (CNS). Although NG2 cells could become active by upregulation of NG2 expression and hypertrophy or extension of their processes under various neuropathological conditions, their actual role in the brain remains to be illustrated. In view of the fact that the synergy of cytokine and chemokine networks plays an important role in CNS inflammation and immunity, we have assumed that the NG2 cells might take part in brain inflammation and immunity by making a contribution to the pool of cytokines or chemokines. In the current study, NG2-expressing OPCs were prepared from cerebral hemispheres of postnatal day 0 or 1 Sprague–Dawley rats. Our results showed that NG2-expressing OPCs, verified by immunohistological staining of anti-NG2 antibody and anti-platelet-derived growth factor receptor alpha (PDGFRα) antibody, presented binding affinity to lipopolysaccharide (LPS), a commonly used stimulator in a neuroinflammatory model. Using cytokine antibody array, QPCR and ELISA, we have further shown that LPS could upregulate the expression of cytokine induced neutrophil chemoattractant-3 (CINC-3) and LPS induced CXC chemokine (LIX) in primary NG2-expressing OPCs, without the alteration in cell number of NG2-expressing OPCs. In addition, the cells bearing the receptor for these two cytokines included microglia and OPCs. Taken together, our results suggest that NG2-expressing OPCs could response to LPS and may take part in neuroinflammatory process, through secreting cytokines and chemokines to exert an effect on target cells (OPCs and microglia).

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Acknowledgments

This study was supported by National Medical Research Council of Singapore (NMRC/EDG/0036/2008) and National Research Foundation of Singapore (NRF-CRP 002-082).

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Authors and Affiliations

  1. Department of Anatomy, Histology and Embryology, School of Basic Medical Science, Fudan University, Shanghai, 200032, China

    Yan Li

  2. Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore

    Yan Li & Bei-ping He

  3. Duke-NUS Graduate Medical School Singapore, Singapore, Singapore

    Xiao-li Du

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  1. Yan Li
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Correspondence to Bei-ping He.

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Li, Y., Du, Xl. & He, Bp. Lipopolysaccharide Upregulates the Expression of CINC-3 and LIX in Primary NG2 Cells. Neurochem Res 41, 1448–1457 (2016). https://doi.org/10.1007/s11064-016-1856-6

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