The apical complex couples cell fate and cell survival to cerebral cortical development.

Abstract:

:Cortical development depends upon tightly controlled cell fate and cell survival decisions that generate a functional neuronal population, but the coordination of these two processes is poorly understood. Here we show that conditional removal of a key apical complex protein, Pals1, causes premature withdrawal from the cell cycle, inducing excessive generation of early-born postmitotic neurons followed by surprisingly massive and rapid cell death, leading to the abrogation of virtually the entire cortical structure. Pals1 loss shows exquisite dosage sensitivity, so that heterozygote mutants show an intermediate phenotype on cell fate and cell death. Loss of Pals1 blocks essential cell survival signals, including the mammalian target of rapamycin (mTOR) pathway, while mTORC1 activation partially rescues Pals1 deficiency. These data highlight unexpected roles of the apical complex protein Pals1 in cell survival through interactions with mTOR signaling.

journal_name

Neuron

journal_title

Neuron

authors

Kim S,Lehtinen MK,Sessa A,Zappaterra MW,Cho SH,Gonzalez D,Boggan B,Austin CA,Wijnholds J,Gambello MJ,Malicki J,LaMantia AS,Broccoli V,Walsh CA

doi

10.1016/j.neuron.2010.03.019

subject

Has Abstract

pub_date

2010-04-15 00:00:00

pages

69-84

issue

1

eissn

0896-6273

issn

1097-4199

pii

S0896-6273(10)00190-X

journal_volume

66

pub_type

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