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Interrogating the ccm-3 Gene Network
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DOI：10.1016/j.celrep.2018.08.039.png)
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Abstract
En 中文
Cerebral cavernous malformations (CCMs) are neurovascular lesions caused by mutations in one of three genes (CCM1-3). Loss of CCM3 causes the poorest prognosis, and little is known about how it regulates vascular integrity. The C. elegans ccm-3 gene regulates the development of biological tubes that resemble mammalian vasculature, and in a genome-wide reverse genetic screen, we identified more than 500 possible CCM-3 pathway genes. With a phenolog-like approach, we generated a human CCM signaling network and identified 29 genes in common, of which 14 are required for excretory canal extension and membrane integrity, similar to ccm-3. Notably, depletion of the MO25 ortholog mop-25.2 causes severe defects in tube integrity by preventing CCM-3 localization to apical membranes. Furthermore, loss of MO25 phenocopies CCM3 ablation by causing stress fiber formation in endothelial cells. This work deepens our understanding of how CCM3 regulates vascular integrity and may help identify therapeutic targets for treating CCM3 patients.
Keywords:
CEREBRAL CAVERNOUS MALFORMATIONS
CAENORHABDITIS-ELEGANS
KINASE INHIBITION
EXCRETORY SYSTEM
GCKIII PROTEINS
RHO KINASE
PATHWAY
MODELS
ANGIOGENESIS
TRAFFICKING
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