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Cell-autonomous integrin control of Wnt and Notch signalling during somitogenesis

Rallis, Charalampos and Pinchin, Sheena M and Ish-Horowicz, David (2010) 'Cell-autonomous integrin control of Wnt and Notch signalling during somitogenesis.' Development, 137 (21). pp. 3591-3601. ISSN 0950-1991

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Integrins act at signalling crossroads, and their interactions with other signal transduction pathways are key to the regulation of normal and pathological cell cytoarchitecture and behaviour. Here, we describe a signalling cascade that acts during the formation of the defining segmental features of the vertebrate body – the somites – in which β1-integrin activity regulates epithelialisation by controlling downstream Wnt and Notch activity crucial for somite border formation. Using in vivo transcriptional inhibition in the developing chick embryo, we show that β1-integrin in the anterior presomitic mesoderm activates canonical Wnt signalling in a cell-autonomous, `outside-inside' manner. Signalling is mediated by integrin-linked kinase (ILK), leading to modulation of glycogen synthase kinase 3β (GSK3β) phosphorylation, and activates Notch signalling in the anterior presomitic mesoderm. The two signalling pathways then cooperate to promote somite formation via cMESO1/Mesp2. Our results show that β1-integrin can regulate cell shape and tissue morphogenesis indirectly, by regulation of downstream signalling cascades.

Item Type: Article
Uncontrolled Keywords: Notch; Wnt; Integrin; Signalling; Somitogenesis; Chick
Divisions: Faculty of Science and Health
Faculty of Science and Health > Life Sciences, School of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 18 Jun 2021 14:01
Last Modified: 06 Jan 2022 14:10

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