Two novel mutations of the CYP11B2 gene in a Japanese patient with aldosterone deficiency type 1

Eisuke Kondo, Akie Nakamura, Keiko Homma, Tomonobu Hasegawa, Takeshi Yamaguchi, Masahiko Narugami, Tetsuo Hattori, Hayato Aoyagi, Katsura Ishizu, Toshihiro Tajima

研究成果: Article

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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 chromatography-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.1149C>T, 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.

元の言語English
ページ(範囲)51-55
ページ数5
ジャーナルEndocrine journal
60
発行部数1
DOI
出版物ステータスPublished - 2013

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Endocrinology

フィンガープリント Two novel mutations of the CYP11B2 gene in a Japanese patient with aldosterone deficiency type 1' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

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    Kondo, E., Nakamura, A., Homma, K., Hasegawa, T., Yamaguchi, T., Narugami, M., Hattori, T., Aoyagi, H., Ishizu, K., & Tajima, T. (2013). Two novel mutations of the CYP11B2 gene in a Japanese patient with aldosterone deficiency type 1. Endocrine journal, 60(1), 51-55. https://doi.org/10.1507/endocrj.EJ12-0248