Abstract:
:Cell polarity plays a key role in the development of the central nervous system (CNS). Interestingly, disruption of cell polarity is seen in many cancers. ASPP2 is a haplo-insufficient tumor suppressor and an activator of the p53 family. In this study, we show that ASPP2 controls the polarity and proliferation of neural progenitors in vivo, leading to the formation of neuroblastic rosettes that resemble primitive neuroepithelial tumors. Consistent with its role in cell polarity, ASPP2 influences interkinetic nuclear migration and lamination during CNS development. Mechanistically, ASPP2 maintains the integrity of tight/adherens junctions. ASPP2 binds Par-3 and controls its apical/junctional localization without affecting its expression or Par-3/aPKC lambda binding. The junctional localization of ASPP2 and Par-3 is interdependent, suggesting that they are prime targets for each other. These results identify ASPP2 as a regulator of Par-3, which plays a key role in controlling cell proliferation, polarity, and tissue organization during CNS development.
journal_name
Dev Celljournal_title
Developmental cellauthors
Sottocornola R,Royer C,Vives V,Tordella L,Zhong S,Wang Y,Ratnayaka I,Shipman M,Cheung A,Gaston-Massuet C,Ferretti P,Molnár Z,Lu Xdoi
10.1016/j.devcel.2010.06.003subject
Has Abstractpub_date
2010-07-20 00:00:00pages
126-37issue
1eissn
1534-5807issn
1878-1551pii
S1534-5807(10)00293-5journal_volume
19pub_type
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