To elucidate the role of cell adhesion during development of the nervous system, I examined two molecules that link the cell surface molecules, forming the adherens junctions, to the cytoskelleton. Conditional genetic deletion of each of these molecules (α- and β-catenin) in a defined region of the developing forebrain revealed their main role in influencing cell proliferation at early developmental stages. While β-catenin deletion caused most progenitors to exit the cell cycle, α-catenin deletion resulted in the opposite effect. This is due to the inhibition and activation of the same cell signalling pathway mediated by cytosolic β-catenin. While adherens junction formation was not affected, cell morphology and tissue architecture was severely disturbed due to the failure to connect the cytoskeleton to the adherens junctions. Thus, coupling to the cytoskeleton rather than cell adhesion are key in regulation neural cell proliferation.
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To elucidate the role of cell adhesion during development of the nervous system, I examined two molecules that link the cell surface molecules, forming the adherens junctions, to the cytoskelleton. Conditional genetic deletion of each of these molecules (α- and β-catenin) in a defined region of the developing forebrain revealed their main role in influencing cell proliferation at early developmental stages. While β-catenin deletion caused most progenitors to exit the cell cycle, α-catenin deleti...
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