Oligodendrocyte progenitor cell fate and function in development and disease.

Differentiation of oligodendrocyte progenitor cells (OPCs) into myelination-capable mature oligodendrocytes is essential for proper function of the central nervous system. OPCs are tissue-resident stem cells that populate all regions of the central nervous system and exist beyond development into adulthood. Disorders that lead to disruption of this critical cell state change cause devastating myelin diseases that are often associated with shortened life span. Recent findings have also provided support for a newly appreciated contribution of perturbed OPC differentiation to neurodegenerative and psychiatric diseases. These findings emphasize the need for a more complete understanding of OPC differentiation in health and disease. Here, we review recent molecular and functional findings revealing new roles of OPCs. It is our hope that this review provides readers with an enticing snapshot of current OPC research and highlights the potential of controlling OPC fate and function to treat diseases of the brain.