血管新生における力の機能についての研究

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I identified Marcksl1, an actin-binding protein, as a molecular regulator of endothelial cell cortex during blood vessel morphogenesis in the zebrafish embryo. During lumen formation, Marcksl1 localization is enriched in the apical membrane. Overexpression of the protein perturbed cell cortex integrity so that 1) excessive blebs form at the apical membrane during lumen expansion and 2) ectopic blebs from at the basal membrane in perfused vessels that dissipate after inhibiting blood flow. In addition, endothelial cells with increased Marcksl1 expression are irregular in shape so that they are more dilated than wild type cells. These findings suggest that Marcksl1 regulates endothelial cell cortex dynamics and strength and that a robust cortex is required to resist haemodynamic forces and maintain blood vessel structure.