Association of a mutation in thiazide-sensitive Na-Cl cotransporter with familial Gitelman's syndrome

Kazuhisa Takeuchi, Shigeo Kure, Taro Kato, Yoshihiro Taniyama, Nobuyuki Takahashi, Yukio Ikeda, Takaaki Abe, Kuniaki Narisawa, Yasunari Muramatsu, Keishi Abe

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58 Citations (Scopus)


Gitelman's syndrome is a variant of Bartter's syndrome, characterized by hypokalemia, hypomagnesemia, hypocalciuria, and hypovolemia. We have observed familial cases of Gitelman's syndrome, and a possible mutation in thiazide- sensitive Na-Cl cotransporter was investigated in this kindred. The proband was a 47-yr old Japanese female, and her mother was also affected. Her parents and maternal grandparents are consanguineous. By using PCR amplification and direct sequencing, we identified a novel non-conservative missense mutation at 623 amino acid position, which substitutes proline for leucine (L623P), and also creates an Nci I restriction site in the exon 15. The mutation was not detected in normal healthy subjects (n=102). Nci I digestion of PCR-amplified exon 15 DNA fragments from individuals in the family indicated the autosomal recessive inheritance of the disorder. In conclusion, the L623P mutation in the thiazide-sensitive Na-Cl cotransporter gene is suggested to impair the transporter activity, and to underlie this familial Gitelman's syndrome; Gitelman's syndrome observed in this kindred has been inherited in an autosomal recessive fashion.

Original languageEnglish
Pages (from-to)4496-4499
Number of pages4
JournalJournal of Clinical Endocrinology and Metabolism
Issue number12
Publication statusPublished - 1996

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Biochemistry
  • Endocrinology
  • Clinical Biochemistry
  • Biochemistry, medical


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