Asymmetric segregation of Numb in retinal development and the influence of the pigmented epithelium.

作者: Michel Cayouette , Alan V. Whitmore , Glen Jeffery , Martin Raff

DOI: 10.1523/JNEUROSCI.21-15-05643.2001

关键词:

摘要: Asymmetric segregation of cell-fate determinants during cytokinesis plays an important part in controlling choice invertebrates. During Drosophila neurogenesis, for example, asymmetric the Numb protein, which inhibits Notch signaling, is necessary two daughter cells a division to have different fates. In vertebrates, role uncertain, and way process might be regulated unknown. We studied orientation cell divisions distribution developing rat retina. show that, whereas most retinal neuroepithelial divide with their mitotic spindles oriented parallel plane neuroepithelium, substantial minority divides perpendicularly. The proportion these vertically dividing changes development, peaking around day birth. appears inherited only by apical when vertically. Similarly, dissociated cultures, some asymmetrically distribute one cells, suggesting that can retain polarity vitro. Using explant we find pigment epithelium apparently promotes vertical neural To our knowledge, this first evidence may contribute diversification mammalian retina controls influencing adjacent

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