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Medical Definition of O 2A progenitor
1. Bipotential progenitor cells in rat optic nerve that give rise initially to oligodendrocytes and then to type 2 astrocytes. Production of type 2 astrocytes from O 2A progenitor cells in vitro is triggered by ciliary neurotrophic factor (CNTF). This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)