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NG2+ CNS glial progenitors remain committed to the oligodendrocyte lineage in postnatal life and following neurodegeneration.

Authors:
Kang SH, Fukaya M, Yang JK, Rothstein JD, Bergles DE
Affiliation:
Journal:
Neuron

Abstract

The mammalian CNS contains a ubiquitous population of glial progenitors known as NG2+ cells that have the ability to develop into oligodendrocytes and undergo dramatic changes in response to injury and demyelination. Although it has been reported that NG2+ cells are multipotent, their fate in health and disease remains controversial. Here, we generated PDGFαR-CreER transgenic mice and followed their fate in vivo in the developing and adult CNS. These studies revealed that NG2+ cells in the postnatal CNS generate myelinating oligodendrocytes, but not astrocytes or neurons. In regions of neurodegeneration in the spinal cord of ALS mice, NG2+ cells exhibited enhanced proliferation and accelerated differentiation into oligodendrocytes but remained committed to the oligodendrocyte lineage. These results indicate that NG2+ cells in the normal CNS are oligodendrocyte precursors with restricted lineage potential and that cell loss and gliosis are not sufficient to alter the lineage potential of these progenitors.

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