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  • Title: Only two mutations detected in 15 Tunisian patients with 11β-hydroxylase deficiency: the p.Q356X and the novel p.G379V.
    Author: Kharrat M, Trabelsi S, Chaabouni M, Maazoul F, Kraoua L, Ben Jemaa L, Gandoura N, Barsaoui S, Morel Y, M'rad R, Chaabouni H.
    Journal: Clin Genet; 2010 Oct; 78(4):398-401. PubMed ID: 20331679.
    Abstract:
    Steroid 11β-hydroxylase deficiency is the second most common cause of congenital adrenal hyperplasia, resulting in virilization, glucocorticoid deficiency and hypertension. The 11β-hydroxylase enzyme is encoded by the CYP11B1 gene and mutations in this gene are responsible for this disease. The aim of this study was to characterize mutations in the CYP11B1 gene and to determine their frequencies in a cohort of Tunisian patients. The molecular genetic analysis was performed by direct nucleotide sequencing of the CYP11B1 gene in 15 unrelated Tunisian patients suffering from classical 11β-hydroxylase deficiency. Only two mutations were detected in homozygous state in the CYP11B1 gene of all patients, the p.Q356X in exon 6 (26.6%) and the novel p.G379V in exon 7 with large prevalence (73.3%). This is the first report of screening for mutations of CYP11B1 gene in the Tunisian population and even in the Arab population.
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