• Bulent Guclu, Ali K Ozturk, Katie L Pricola, Kaya Bilguvar, Dana Shin, Brian J O'Roak, and Murat Gunel.
• Yale Neurovascular Surgery Program, Department of Neurosurgery, Yale University School of Medicine, New Haven, Connecticut 06510, USA.
• Neurosurgery. 2005 Nov 1; 57 (5): 1008-13.

ObjectiveTo identify the CCM3 gene in a population of 61 families with a positive family history of cerebral cavernous malformations (CCM), 8 of which had suggestive linkage to the CCM3 locus.MethodsWe searched for mutations within the CCM3 interval using a high-throughput screening technique, temperature-gradient capillary electrophoresis. Mutations detected by this device were subsequently sequenced, and the results were analyzed.ResultsA recent study by Bergametti et al. established Programmed Cell Death 10 (PDCD10) as the gene responsible for CCM3. We hereby confirm PDCD10 as the CCM3 gene by reporting four novel mutations in 61 CCM families. Two of these mutations were identical and produced a stop codon in exon 7. Another two resulted in frameshift mutations in exon 6, although the mutations occurred at different points along the exon. The last mutation caused a frameshift in exon 9. Of note, mutations in these families completely cosegregated with the trait. Three of the five families had prior linkage data suggestive of the CCM3 locus, whereas the remaining two were identified in index patients with a positive family history but no linkage data.ConclusionOur data establish PDCD10 as the gene responsible for CCM in families linking to the CCM3 locus. The discovery of the third gene involved in inherited forms of CCM, after KRIT1 and Malcavernin, is an important step toward dissecting the molecular pathophysiology of this disease.

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