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Lack of CCM1 induces hypersprouting and impairs response to flow
Journal article   Open access   Peer reviewed

Lack of CCM1 induces hypersprouting and impairs response to flow

Tara M Mleynek, Aubrey C Chan, Michael Redd, Christopher C Gibson, Chadwick T Davis, Dallas S Shi, Tiehua Chen, Kandis L Carter, Jing Ling, Raquel Blanco, …
Human molecular genetics, Vol.23(23), pp.6223-6234
12/01/2014
DOI: 10.1093/hmg/ddu342
PMCID: PMC4222362
PMID: 24990152
url
https://doi.org/10.1093/hmg/ddu342View
Published (Version of record) Open Access

Abstract

Cerebral cavernous malformation (CCM) is a disease of vascular malformations known to be caused by mutations in one of three genes: CCM1, CCM2 or CCM3. Despite several studies, the mechanism of CCM lesion onset remains unclear. Using a Ccm1 knockout mouse model, we studied the morphogenesis of early lesion formation in the retina in order to provide insight into potential mechanisms. We demonstrate that lesions develop in a stereotypic location and pattern, preceded by endothelial hypersprouting as confirmed in a zebrafish model of disease. The vascular defects seen with loss of Ccm1 suggest a defect in endothelial flow response. Taken together, these results suggest new mechanisms of early CCM disease pathogenesis and provide a framework for further study.
Animals Animals, Genetically Modified Hemangioma, Cavernous, Central Nervous System - genetics Hemangioma, Cavernous, Central Nervous System - metabolism Hemangioma, Cavernous, Central Nervous System - pathology Humans KRIT1 Protein Mice, Knockout Microtubule-Associated Proteins - genetics Microtubule-Associated Proteins - metabolism Proto-Oncogene Proteins - genetics Proto-Oncogene Proteins - metabolism Retina - pathology Zebrafish

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