Involvement of CD45 in central nervous system myelination

Jin Nakahara, Chika Seiwa, Kyoko Tan-Takeuchi, Mari Gotoh, Kenji Kishihara, Masaharu Ogawa, Hiroaki Asou, Sadakazu Aiso

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Myelin is a multi-layered membranous lipid insulator surrounding axons that allows the rapid conduction of neuronal impulses. In the central nervous system (CNS), myelin is produced by oligodendrocytes. During development, morphologically immature oligodendrocyte precursor cells (OPCs) arise from neural stem cells before differentiating into myelinating oligodendrocytes shortly after birth. Fyn tyrosine kinase (Fyn) has been shown to play a central role during OPC differentiation, including inducing morphological changes in the cells and initiating the expression of myelin basic protein (MBP), a major structural protein required for the compaction of myelin sheaths. Recently, we have shown that signaling via the γ chain of immunoglobulin Fc receptors (FcRγ) induces the Fyn-MBP cascade and promotes the morphological differentiation of OPCs. The protein tyrosine phosphatases that are responsible for the positive regulation of Fyn tyrosine kinase activity during this cascade, however, remained unknown. Here we report that a protein tyrosine phosphatase, CD45, is involved in this process. Fyn co-immunoprecipitated with CD45 from differentiating wild-type OPCs in vitro, while CD45-deficient OPCs failed to differentiate. Additionally, dysmyelination was observed in CD45-deficient mice in vivo. Our findings suggest that CD45 is a key phosphatase involved in OPC differentiation and provide a preliminary explanation for the previously reported CD45 mutations observed in some multiple sclerosis (MS) patients.

Original languageEnglish
Pages (from-to)116-121
Number of pages6
JournalNeuroscience Letters
Volume379
Issue number2
DOIs
Publication statusPublished - 2005 May 6

Fingerprint

Oligodendroglia
Central Nervous System
Proto-Oncogene Proteins c-fyn
Myelin Sheath
Protein Tyrosine Phosphatases
Myelin Basic Protein
Cell Differentiation
Immunoglobulin Subunits
Neural Stem Cells
Fc Receptors
Phosphoric Monoester Hydrolases
Multiple Sclerosis
Axons
Parturition
Lipids
Mutation

Keywords

  • CD45
  • Differentiation
  • Fyn tyrosine kinase
  • Immunoglobulin Fc receptors
  • Myelin basic protein
  • Oligodendrocyte precursor cells

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Nakahara, J., Seiwa, C., Tan-Takeuchi, K., Gotoh, M., Kishihara, K., Ogawa, M., ... Aiso, S. (2005). Involvement of CD45 in central nervous system myelination. Neuroscience Letters, 379(2), 116-121. https://doi.org/10.1016/j.neulet.2004.12.066

Involvement of CD45 in central nervous system myelination. / Nakahara, Jin; Seiwa, Chika; Tan-Takeuchi, Kyoko; Gotoh, Mari; Kishihara, Kenji; Ogawa, Masaharu; Asou, Hiroaki; Aiso, Sadakazu.

In: Neuroscience Letters, Vol. 379, No. 2, 06.05.2005, p. 116-121.

Research output: Contribution to journalArticle

Nakahara, J, Seiwa, C, Tan-Takeuchi, K, Gotoh, M, Kishihara, K, Ogawa, M, Asou, H & Aiso, S 2005, 'Involvement of CD45 in central nervous system myelination', Neuroscience Letters, vol. 379, no. 2, pp. 116-121. https://doi.org/10.1016/j.neulet.2004.12.066
Nakahara J, Seiwa C, Tan-Takeuchi K, Gotoh M, Kishihara K, Ogawa M et al. Involvement of CD45 in central nervous system myelination. Neuroscience Letters. 2005 May 6;379(2):116-121. https://doi.org/10.1016/j.neulet.2004.12.066
Nakahara, Jin ; Seiwa, Chika ; Tan-Takeuchi, Kyoko ; Gotoh, Mari ; Kishihara, Kenji ; Ogawa, Masaharu ; Asou, Hiroaki ; Aiso, Sadakazu. / Involvement of CD45 in central nervous system myelination. In: Neuroscience Letters. 2005 ; Vol. 379, No. 2. pp. 116-121.
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