Brain, Vol 121, Issue 12 2221-2228, Copyright © 1998 by Oxford University Press
N Scolding, R Franklin, S Stevens, CH Heldin, A Compston and J Newcombe
In multiple sclerosis, partial remyelination is conspicuous in many
lesions, but widespread and lasting myelin repair ultimately fails as
disability and handicap accumulate. Thus far, the precise identity of the
cell responsible for limited spontaneous myelin repair has remained
obscure. In the rodent, the proliferative oligodendrocyte progenitor is the
most efficient remyelinating cell; this has now been identified in cultures
prepared from normal human brain, but has proved difficult to demonstrate
in situ. We adapted techniques using antibodies against the human
platelet-derived growth factor-alpha receptor to identify oligodendrocyte
progenitors in human tissue sections. Small numbers of oligodendrocyte
progenitors were found in normal adult human white matter. Progenitors were
also demonstrable in acute and chronic lesions from patients dying with
multiple sclerosis, but with no evidence of any marked reactive increase in
cell numbers. Understanding the biology of the remyelinating cell, and in
particular the reason for its apparent failure to repopulate demyelinated
lesions, is important for the development of remyelination treatments.
ARTICLES
Oligodendrocyte progenitors are present in the normal adult human CNS and in the lesions of multiple sclerosis
MRC Cambridge Centre for Brain Repair, University of Cambridge Neurology Unit, Addenbrooke's Hospital, UK.
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