Cep55 regulation of PI3K/Akt signaling is required for neocortical development and ciliogenesis

Author:

Rashidieh BehnamORCID,Shohayeb BelalORCID,Bain Amanda Louise,Fortuna Patrick R. J.,Sinha Debottam,Burgess AndrewORCID,Mills Richard,Adams Rachael C.ORCID,Lopez J. AlejandroORCID,Blumbergs PeterORCID,Finnie John,Kalimutho MuruganORCID,Piper MichaelORCID,Hudson James EdwardORCID,Ng Dominic C. H.ORCID,Khanna Kum KumORCID

Abstract

Homozygous nonsense mutations in CEP55 are associated with several congenital malformations that lead to perinatal lethality suggesting that it plays a critical role in regulation of embryonic development. CEP55 has previously been studied as a crucial regulator of cytokinesis, predominantly in transformed cells, and its dysregulation is linked to carcinogenesis. However, its molecular functions during embryonic development in mammals require further investigation. We have generated a Cep55 knockout (Cep55-/-) mouse model which demonstrated preweaning lethality associated with a wide range of neural defects. Focusing our analysis on the neocortex, we show that Cep55-/- embryos exhibited depleted neural stem/progenitor cells in the ventricular zone as a result of significantly increased cellular apoptosis. Mechanistically, we demonstrated that Cep55-loss downregulates the pGsk3β/β-Catenin/Myc axis in an Akt-dependent manner. The elevated apoptosis of neural stem/progenitors was recapitulated using Cep55-deficient human cerebral organoids and we could rescue the phenotype by inhibiting active Gsk3β. Additionally, we show that Cep55-loss leads to a significant reduction of ciliated cells, highlighting a novel role in regulating ciliogenesis. Collectively, our findings demonstrate a critical role of Cep55 during brain development and provide mechanistic insights that may have important implications for genetic syndromes associated with Cep55-loss.

Funder

National Health and Medical Research Council

Publisher

Public Library of Science (PLoS)

Subject

Cancer Research,Genetics (clinical),Genetics,Molecular Biology,Ecology, Evolution, Behavior and Systematics

Reference59 articles.

1. Cdk1/Erk2-and Plk1-dependent phosphorylation of a centrosome protein, Cep55, is required for its recruitment to midbody and cytokinesis;M Fabbro;Dev Cell,2005

2. Beyond cytokinesis: the emerging roles of CEP55 in tumorigenesis;J Jeffery;Oncogene,2016

3. CEP 55 is a determinant of cell fate during perturbed mitosis in breast cancer.;M Kalimutho,2018

4. A nonsense mutation in CEP55 defines a new locus for a Meckel-like syndrome, an autosomal recessive lethal fetal ciliopathy;M Bondeson;Clin Genet,2017

5. An Amish founder variant consolidates disruption of CEP55 as a cause of hydranencephaly and renal dysplasia;LE Rawlins;Eur J Hum Genet,2019

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