Abstract
Oligodendrocytes are the primary source of myelin in the adult central nervous system (CNS), and their dysfunction or loss underlies several diseases of both children and adults. Dysmyelinating and demyelinating diseases are thus attractive targets for cell-based strategies since replacement of a single presumably homogeneous cell type has the potential to restore functional levels of myelin. To understand the obstacles that cell-replacement therapy might face, we review oligodendrocyte biology and emphasize aspects of oligodendrocyte development that will need to be recapitulated by exogenously transplanted cells, including migration from the site of transplantation, axon recognition, terminal differentiation, axon wrapping, and myelin production and maintenance. We summarize studies in which different types of myelin-forming cells have been transplanted into the CNS and highlight the continuing challenges regarding the use of cell-based therapies for human white matter disorders.
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Abbreviations
- ATP:
-
Adenosine triphosphate
- CNP:
-
2′,3′-Cyclic nucleotide-3′phosphodiesterase
- CNS:
-
Central nervous system
- CNTF:
-
Ciliary neurotrophic factor
- EAE:
-
Experimental autoimmune encephalomyelitis
- GalC:
-
Galactocerebrosidase
- IGF-1:
-
Insulin-like growth factor 1
- iPSCs:
-
Induced pluripotent stem cells
- miRs:
-
MicroRNAs
- MAG:
-
Myelin-associated glycoprotein
- MBP:
-
Myelin basic protein
- MOG:
-
Myelin/oligodendrocyte glycoprotein
- MS:
-
Multiple sclerosis
- MSC:
-
Mesenchymal stem cells
- mTOR:
-
Mammalian target of rapamycin
- NSCs:
-
Neural stem cells
- O2A:
-
Oligodendrocyte-type 2 astrocyte precursor
- OPCs:
-
Oligodendrocyte precursors
- PDGFR:
-
Platelet derived growth factor receptor
- Plp:
-
Proteolipid protein
- PMD:
-
Pelizaeus–Merzbacher disease
- PNS:
-
Peripheral nervous system
- PTEN:
-
Phosphatase and tensin homolog
- T3:
-
3,5,3-Triiodothyronine (thyroid hormone)
- Tcf4:
-
Transcription factor 4
- YY1:
-
Ying Yang 1
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Acknowledgments
We regret that the essential work of many investigators could not be included in this review due to space constraints. We wish to thank our funding support: California Institute for Regenerative Medicine Postdoctoral Training Grant (G.B. Potter), NIH K08 NS062744 (M.A. Petryniak), and Howard Hughes Medical Institute (D.H. Rowitch).
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Potter, G.B., Rowitch, D.H. & Petryniak, M.A. Myelin Restoration: Progress and Prospects for Human Cell Replacement Therapies. Arch. Immunol. Ther. Exp. 59, 179–193 (2011). https://doi.org/10.1007/s00005-011-0120-7
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DOI: https://doi.org/10.1007/s00005-011-0120-7