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Mutations in 2 distinct genetic pathways result in cerebral cavernous malformations in mice.

Cerebral cavernous malformations (CCMs) are a common type of vascular malformation in the brain that are a major cause of hemorrhagic stroke. This condition has been independently linked to 3 separate genes: Krev1 interaction trapped (KRIT1), Cerebral cavernous malformation 2 (CCM2), and Programmed cell death 10 (PDCD10). Despite the commonality in disease pathology caused by mutations in these 3 genes, we found that the loss of Pdcd10 results in significantly different developmental, cell biological, and signaling phenotypes from those seen in the absence of Ccm2 and Krit1. PDCD10 bound to germinal center kinase III (GCKIII) family members, a subset of serine-threonine kinases, and facilitated lumen formation by endothelial cells both in vivo and in vitro. These findings suggest that CCM may be a common tissue manifestation of distinct mechanistic pathways. Nevertheless, loss of heterozygosity (LOH) for either Pdcd10 or Ccm2 resulted in CCMs in mice. The murine phenotype induced by loss of either protein reproduced all of the key clinical features observed in human patients with CCM, as determined by direct comparison with genotype-specific human surgical specimens. These results suggest that CCM may be more effectively treated by directing therapies based on the underlying genetic mutation rather than treating the condition as a single clinical entity.

Pubmed ID: 21490399

Authors

  • Chan AC
  • Drakos SG
  • Ruiz OE
  • Smith AC
  • Gibson CC
  • Ling J
  • Passi SF
  • Stratman AN
  • Sacharidou A
  • Revelo MP
  • Grossmann AH
  • Diakos NA
  • Davis GE
  • Metzstein MM
  • Whitehead KJ
  • Li DY

Journal

The Journal of clinical investigation

Publication Data

May 3, 2011

Associated Grants

  • Agency: NHLBI NIH HHS, Id: R01 HL059373
  • Agency: NHLBI NIH HHS, Id: R01 HL065648
  • Agency: NIGMS NIH HHS, Id: T32-GM007464 
  • Agency: Wellcome Trust, Id:

Mesh Terms

  • Animals
  • Brain
  • Gene Expression Regulation, Developmental
  • Genotype
  • Hemangioma, Cavernous, Central Nervous System
  • Humans
  • Intracellular Signaling Peptides and Proteins
  • Loss of Heterozygosity
  • Mice
  • Mice, Transgenic
  • Microfilament Proteins
  • Microtubule-Associated Proteins
  • Models, Genetic
  • Mutation
  • Phenotype
  • Proto-Oncogene Proteins
  • Time Factors