کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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2198256 | 1551008 | 2006 | 5 صفحه PDF | دانلود رایگان |
17α-Hydroxylase deficiency is a rare disease caused by mutation of the CYP17 gene, resulting in hypertension, hypokalemia, female sexual infantilism or male pseudohermaphroditism, low blood cortisol and low plasma renin activity. Herein, we report a female Taiwanese with 17α-hydroxylase deficiency. The CYP17 genes of this patient and five members of her family were analyzed by PCR-direct sequencing. One allele of the patient contains a 9-bp (c. 1459–1467 GACTCTTTC: D487, S488, F489) deletion, which is prevalent in Southeast Asia. The other allele has a 6-bp (c. 1480–1485 AAGGTG: K494, V495) deletion and an R496L (c. 1487 G>T) missense mutation, which is a novel mutation. Site-directed mutagenesis, in vitro expression and functional analysis in HEK-293T cells showed that this novel mutation [K494_V495 Del; R496L] resulted in complete loss of 17α-hydroxylase and 17,20-lyase activity. Thus this novel mutation in the extreme C-terminus abolishes enzyme activity, and when accompanied by a 9-bp deletion at codons 487–489 in the other allele, results in 17α-hydroxylase/17,20-lyase deficiency in this patient.
Journal: Molecular and Cellular Endocrinology - Volume 249, Issues 1–2, 25 April 2006, Pages 16–20