Abstract
Drosophila melanogaster is a key model system that has greatly contributed to the advance of developmental biology through its extensive and sophisticated genetics. Nevertheless, only a few in vitro approaches are available in Drosophila to complement genetic studies in order to better elucidate developmental mechanisms at the cellular and molecular level. Here we present a dissociated cell culture system generated from the optic lobes of Drosophila larval brain. This culture system makes it feasible to study the proliferative properties of Drosophila postembryonic Nbs by allowing BrdU pulse and chase assays, as well as detailed immunocytochemical analysis with molecular markers. These immunofluorescence experiments allowed us to conclude that localization of asymmetric cell division markers such as Inscuteable, Miranda, Prospero and Numb is cell autonomous. By time-lapse video recording we have observed interesting cellular features of postembryonic neurogenesis such us the polarized genesis of the neuroblast progeny, the extremely short ganglion mother cell (GMC) cell cycle, and the last division of a neuroblast lineage. The combination of this cell culture system and genetic tools of Drosophila will provide a powerful experimental model for the analysis of cell cycle and asymmetric cell division of neural progenitor cells.
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