Document Detail


C329X in KRIT1 is a founder mutation among CCM patients in Sardinia.
MedLine Citation:
PMID:  19454328     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Cerebral cavernous malformations (CCMs) are CNS vascular anomalies associated with seizures, headaches and hemorrhagic strokes and represent 10-20% of cerebral lesions. CCM is present in 0.1-0.5 of the population. This disorder most often occurs sporadically but may also be familial. Familial cases are inherited as a dominant trait with incomplete penetrance and are estimated to account for KRIT1 10-40% of the patients. The identification of the genes involved in such disorders allows to characterize carriers of the mutations without clear symptoms. The first gene involved in CCM1 is KRIT1. In addition to two other genes have been described: MGC4607 (CCM2) and PDCD10 (CCM3). We selected 13 patients belonging to seven Sardinian families on the basis of clinical symptoms and Magnetic Resonance results. In MGC4607 gene an undescribed exon five deletion likely producing a truncated protein was identified in one family. In two patients with clear phenotype and in three asymptomatic relatives a 4 bp deletion in exon 9 of KRIT1 gene, leading to a premature stop codon, was detected. A unique nonsense mutation (C329X) has been found in seven patients and two asymptomatic subjects belonging to four unrelated families. Haplotype analysis revealed a common origin of this mutation. These data suggest a "founder effect" in Sardinia for the C329X mutation, similar to other mutations described in different populations.
Authors:
Milena Cau; Mario Loi; Maurizio Melis; Rita Congiu; Alberto Loi; Cristiana Meloni; Marianna Serrenti; Maria Addis; Maria Antonietta Melis
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-05-18
Journal Detail:
Title:  European journal of medical genetics     Volume:  52     ISSN:  1878-0849     ISO Abbreviation:  Eur J Med Genet     Publication Date:    2009 Sep-Oct
Date Detail:
Created Date:  2009-08-25     Completed Date:  2009-11-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101247089     Medline TA:  Eur J Med Genet     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  344-8     Citation Subset:  IM    
Affiliation:
Dipartimento di Scienze biomediche e biotecnologie, University of Cagliari, Via Jenner s/n, 09134 Cagliari, Italy.
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MeSH Terms
Descriptor/Qualifier:
Age of Onset
Codon, Nonsense*
DNA / genetics,  isolation & purification
Exons
Female
Founder Effect*
Haplotypes
Hemangioma, Cavernous, Central Nervous System / genetics*
Humans
Interviews as Topic
Italy
Male
Microtubule-Associated Proteins / genetics*
Mutation*
Nucleic Acid Amplification Techniques
Pedigree
Proto-Oncogene Proteins / genetics*
Sequence Analysis, DNA
Chemical
Reg. No./Substance:
0/Codon, Nonsense; 0/KRIT1 protein, human; 0/Microtubule-Associated Proteins; 0/Proto-Oncogene Proteins; 9007-49-2/DNA

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