TY - JOUR
T1 - Mutation of cytochrome P-45017 α gene (CYP17) in a Japanese patient previously reported as having glucocorticoid-responsive hyperaldosteronism
T2 - With a review of Japanese patients with mutations of CYP17
AU - Miura, Kiyoshi
AU - Yasuda, Keigo
AU - Yanase, Toshihiko
AU - Yamakita, Noriyoshi
AU - Sasano, Hironobu
AU - Nawata, Hajime
AU - Inoue, Minoru
AU - Fukaya, Takao
AU - Shizuta, Yutaka
PY - 1996
Y1 - 1996
N2 - A 17-yr-old female Japanese patient, who was reported in 1968 as having glucocorticoid-responsive hyperaldosteronism but was presumed to have a defect of 17 α-hydroxylation mainly in the adrenal glands as the etiology of her illness, was followed. The relationship between clinical manifestations and molecular abnormalities in cytochrome P-45017 α gene (CYP17) was also reviewed based on the literature on Japanese patients with 17 α-hydroxylase deficiency. She has been treated with dexamethasone, resulting in normal blood pressure and normokalemia for 28 yr. She had almost normal gonadal function with regular menstruation on her first admission. Because of sustained genital bleeding, however, she underwent total hysterectomy with an ovarian biopsy at the age of 42 yr. No follicles or corpus luteum were detected in the ovarian specimen. At the age of 45 yr, the basal levels of sex steroids were decreased, while those of gonadotropins were increased. A genetic study on CYP17 revealed a homozygous deletion of phenylalanine (Phe) codon (TTC) at either amino acid position 53 or 54 in exon 1. A review of the literature revealed 4 patients with this type of CYP17 mutation, including the present patient, out of a total of 11 young adult Japanese patients. The clinical manifestations caused by congenitally deficient gonadal function were not marked in any of these 4 patients, but were marked in 5 of the 7 patients with different mutations of CYP17. The remaining 2 female patients had irregular menstruation. The pretreatment urine/plasma values of aldosterone were variable, normal to high, in individual patients, regardless of the structural abnormalities of CYP17. The following conclusions were suggested: 1) this type of CYP17 mutation is associated with well preserved gonadal function in young adult patients, but it likely causes early reduction of gonadal function with increasing age in these patients; 2) the prevalence of this type of CYP17 mutation is quits high in Japanese patients; and 3) the pretreatment hyperaldosteronism observed in the present patient seems not to be related to the mutation of CYP17.
AB - A 17-yr-old female Japanese patient, who was reported in 1968 as having glucocorticoid-responsive hyperaldosteronism but was presumed to have a defect of 17 α-hydroxylation mainly in the adrenal glands as the etiology of her illness, was followed. The relationship between clinical manifestations and molecular abnormalities in cytochrome P-45017 α gene (CYP17) was also reviewed based on the literature on Japanese patients with 17 α-hydroxylase deficiency. She has been treated with dexamethasone, resulting in normal blood pressure and normokalemia for 28 yr. She had almost normal gonadal function with regular menstruation on her first admission. Because of sustained genital bleeding, however, she underwent total hysterectomy with an ovarian biopsy at the age of 42 yr. No follicles or corpus luteum were detected in the ovarian specimen. At the age of 45 yr, the basal levels of sex steroids were decreased, while those of gonadotropins were increased. A genetic study on CYP17 revealed a homozygous deletion of phenylalanine (Phe) codon (TTC) at either amino acid position 53 or 54 in exon 1. A review of the literature revealed 4 patients with this type of CYP17 mutation, including the present patient, out of a total of 11 young adult Japanese patients. The clinical manifestations caused by congenitally deficient gonadal function were not marked in any of these 4 patients, but were marked in 5 of the 7 patients with different mutations of CYP17. The remaining 2 female patients had irregular menstruation. The pretreatment urine/plasma values of aldosterone were variable, normal to high, in individual patients, regardless of the structural abnormalities of CYP17. The following conclusions were suggested: 1) this type of CYP17 mutation is associated with well preserved gonadal function in young adult patients, but it likely causes early reduction of gonadal function with increasing age in these patients; 2) the prevalence of this type of CYP17 mutation is quits high in Japanese patients; and 3) the pretreatment hyperaldosteronism observed in the present patient seems not to be related to the mutation of CYP17.
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U2 - 10.1210/jc.81.10.3797
DO - 10.1210/jc.81.10.3797
M3 - Article
C2 - 8855840
AN - SCOPUS:0029848913
VL - 81
SP - 3797
EP - 3801
JO - Journal of Clinical Endocrinology and Metabolism
JF - Journal of Clinical Endocrinology and Metabolism
SN - 0021-972X
IS - 10
ER -