Neurochemical Research

, Volume 33, Issue 12, pp 2615–2628

Activation of Inflammatory Response by a Combination of Growth Factors in Cuprizone-Induced Demyelinated Brain Leads to Myelin Repair

Authors

  • Juan Carlos Biancotti
    • Mental Retardation Research Center, Semel Institute for Neuroscience, David Geffen School of MedicineUniversity of California
  • Shalini Kumar
    • Mental Retardation Research Center, Semel Institute for Neuroscience, David Geffen School of MedicineUniversity of California
    • Mental Retardation Research Center, Semel Institute for Neuroscience, David Geffen School of MedicineUniversity of California
Original Paper

DOI: 10.1007/s11064-008-9792-8

Cite this article as:
Biancotti, J.C., Kumar, S. & de Vellis, J. Neurochem Res (2008) 33: 2615. doi:10.1007/s11064-008-9792-8
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Abstract

In vivo remyelination promoted by a combination of four oligodendrocyte specific growth factors (GFs) in cuprizone-induced demyelinated mice brains was described recently by our group [1]. Here we report activation of inflammatory response in mice brain following cuprizone-induced demyelination and its further enhancement immediately after injection of growth factors in vivo, while no significant inflammatory response was evident in GFs-injected normal brains. Cuprizone-induced demyelination was accompanied by increased expression of inflammatory cytokines, TNFα and IL-1β, anti-inflammatory cytokines TGFβ, IL-10 and increased levels of chemokines, CCL2, CCL5, and CXCL10, produced by resident microglia and astrocytes. During demyelination, involvement of oxidative stress was evident by disruption of mitochondrial structure and temporal decline in reduced glutathione levels, later returning to normal. Increase in the cytokines and chemokines was further enhanced within 2 days post injection (dpi) of GFs, coinciding with signal for repair via activation of pAkt and NFκB transcription factor reported earlier. Upregulation of mRNA and protein level of antioxidant genes, metallothionein (MT) I/II and activity of a cytosolic oxidoreductase enzyme, glycerolphosphate-3 dehydrogenase (cGPDH) occurred, resulting in a metabolic shuttle with an increase in glycerol in mice brains during period of demyelination and early GF-mediated repair.

Keywords

CytokinesChemokinesMetallothionein I/IIcGPDH1H-NMR spectroscopyElectron microscopy

Copyright information

© Springer Science+Business Media, LLC 2008