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首页> 外文期刊>Endocrine journal >Two novel mutations of the CYP11B2 gene in a Japanese patient with aldosterone deficiency type 1
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Two novel mutations of the CYP11B2 gene in a Japanese patient with aldosterone deficiency type 1

机译:一名日本醛固酮缺乏症1型患者的CYP11B2基因的两个新突变

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摘要

Isolated hypoaldosteronism is a rare and occasionally life-threatening cause of salt wasting in infancy. A 2-month-old Japanese boy of unrelated parents was examined for failure to thrive and poor weight gain. Laboratory findings were hyponatremia, hyperkalemia, high plasma renin and low aldosterone levels. Spot urine analysis by gas chroma-tography-mass spectrometry (GC-MS) showed that urinary excretion of corticosterone metabolites was elevated. Whereas excretion of 18-hydroxycortricosterone metabolites was within the normal range, excretion of aldosterone metabolites was undetectable. The patient was therefore suspected to have aldosterone synthase deficiency type 1. Sequence analysis of CYP11B2, the gene encoding aldosterone synthase (CYP11B2), showed that the patient was a compound heterozygote for C.168G>A, p.W56X in exon 1 and C.1149OT, p.R384X in exon 7. p.W56X was inherited from his mother and p.R384X was from his father. Since both alleles contain nonsense mutations, a lack of CYP11B2 activity was speculated to cause his condition. To our knowledge, this is the first Japanese patient in which the molecular basis of aldosterone synthase deficiency type 1 has been clarified. This case also indicates that spot urinary steroid analysis is useful for diagnosis.
机译:孤立的醛固酮增多症是婴儿期食盐浪费的罕见原因,有时甚至危及生命。检查了一个2个月大的日本男孩,该男孩的父母没有亲戚,但没有and壮成长,体重增加不佳。实验室检查结果为低钠血症,高钾血症,血浆肾素高和醛固酮水平低。通过气相色谱-质谱法(GC-MS)进行的点尿分析表明,皮质酮代谢产物的尿排泄量增加。 18-羟基皮质酮代谢产物的排泄在正常范围内,而醛固酮代谢产物的排泄却无法检测到。因此,该患者被怀疑患有1型醛固酮合酶缺乏症。编码醛固酮合酶(CYP11B2)的基因CYP11B2的序列分析表明,该患者是外显子1和C中C.168G> A,p.W56X的复合杂合子。 .1149OT,外显子7中的p.R384X。p.W56X继承自他的母亲,p.R384X继承自他的父亲。由于两个等位基因均包含无意义的突变,因此推测CYP11B2活性不足会导致其病情。据我们所知,这是第一位阐明了醛固酮合酶缺乏症1型分子基础的日本患者。该病例还表明,尿中类固醇的现场分析对诊断很有用。

著录项

  • 来源
    《Endocrine journal》 |2013年第1期|51-55|共5页
  • 作者单位

    Department of Pediatrics, Obihiro Kyoukai Hospital, Obihiro 080-0805, Japan;

    Department of Pediatrics Hokkaido University School of Medicine, Sapporo 060-8638, Japan;

    Central Clinical Laboratories, Keio University Hospital, Tokyo, 160-8582, Japan;

    Department of Pediatrics , Keio University School of Medicine, Tokyo 160-8582, Japan;

    Department of Pediatrics, Obihiro Kyoukai Hospital, Obihiro 080-0805, Japan;

    Department of Pediatrics, Obihiro Kyoukai Hospital, Obihiro 080-0805, Japan;

    Department of Pediatrics, Obihiro Kyoukai Hospital, Obihiro 080-0805, Japan;

    Department of Pediatrics, Obihiro Kyoukai Hospital, Obihiro 080-0805, Japan;

    Department of Pediatrics Hokkaido University School of Medicine, Sapporo 060-8638, Japan;

    Department of Pediatrics, Hokkaido University School of Medicine, N15, W7, Sapporo 060-0835, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    aldosterone; CYP11B2; mutations; urinary steroid profile;

    机译:醛固酮CYP11B2;突变尿类固醇激素谱;

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