Copernican stem cells: regulatory constellations in adult hippocampal neurogenesis.

Abstract excerpt

In the adult, neurogenesis occurs where constellations of signaling molecules are correctly orchestrated and where competent cells are present to interpret these signals. As the instruments used to observe adult neurogenesis become more sophisticated, the concept of a discrete competent "stem cell" has become less concrete. Neural progenitor cells once thought committed to a single lineage can be influenced to...

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