BACKGROUND AND PURPOSE: The collagen alpha2(I) gene (COL1A2) on chromosome 7q22.1, a positional and functional candidate for intracranial aneurysm (IA), was extensively screened for susceptibility in Japanese IA patients. METHODS: Twenty-one single nucleotide polymorphisms (SNPs) of COL1A2 were genotyped in genomic DNA from 260 IA patients (including 115 familial cases) (mean age, 59.9 years) and 293 controls (mean age, 61.6 years). Differences in allelic and genotypic frequencies between the patients and controls were evaluated with the chi(2) test. Circular dichroism spectrometry was monitored with collagen-related peptides that mimic triple-helical models of type I collagen with Ala-459 and Pro-459 to estimate the conformation and stability of alterations. RESULTS: Significant genotypic association in the dominant model was observed between an exonic SNP of COL1A2 and familial IA patients (chi(2)=11.08; df=1; P=0.00087; odds ratio=3.19; 95% CI, 2.22 to 6.50). This SNP induces Ala to Pro substitution at amino acid 459, located on a triple-helical domain. Circular dichroism spectra showed that the Pro-459 peptide had a higher thermal stability than the Ala-459 peptide. CONCLUSIONS: The variant of COL1A2 could be a genetic risk factor for IA patients with family history.
BACKGROUND AND PURPOSE: The collagen alpha2(I) gene (COL1A2) on chromosome 7q22.1, a positional and functional candidate for intracranial aneurysm (IA), was extensively screened for susceptibility in Japanese IApatients. METHODS: Twenty-one single nucleotide polymorphisms (SNPs) of COL1A2 were genotyped in genomic DNA from 260 IApatients (including 115 familial cases) (mean age, 59.9 years) and 293 controls (mean age, 61.6 years). Differences in allelic and genotypic frequencies between the patients and controls were evaluated with the chi(2) test. Circular dichroism spectrometry was monitored with collagen-related peptides that mimic triple-helical models of type I collagen with Ala-459 and Pro-459 to estimate the conformation and stability of alterations. RESULTS: Significant genotypic association in the dominant model was observed between an exonic SNP of COL1A2 and familial IApatients (chi(2)=11.08; df=1; P=0.00087; odds ratio=3.19; 95% CI, 2.22 to 6.50). This SNP induces Ala to Pro substitution at amino acid 459, located on a triple-helical domain. Circular dichroism spectra showed that the Pro-459 peptide had a higher thermal stability than the Ala-459 peptide. CONCLUSIONS: The variant of COL1A2 could be a genetic risk factor for IApatients with family history.
Authors: G Kuhlenbäumer; C Konrad; S Krämer; B Kis; D Nabavi; R Dittrich; E B Ringelstein Journal: J Neurol Neurosurg Psychiatry Date: 2006-01 Impact factor: 10.154
Authors: Marco Petruzzellis; Roberto De Blasi; Vincenzo Lucivero; Maria Sancilio; Mariapia Prontera; Angelica Tinelli; Domenico Maria Mezzapesa; Francesco Federico Journal: AJNR Am J Neuroradiol Date: 2007-03 Impact factor: 3.825
Authors: Shawn M Sweeney; Joseph P Orgel; Andrzej Fertala; Jon D McAuliffe; Kevin R Turner; Gloria A Di Lullo; Steven Chen; Olga Antipova; Shiamalee Perumal; Leena Ala-Kokko; Antonella Forlino; Wayne A Cabral; Aileen M Barnes; Joan C Marini; James D San Antonio Journal: J Biol Chem Date: 2008-05-15 Impact factor: 5.157