A Spanish founder mutation in the chloride channel gene, CLCNKB, as a cause of atypical Bartter syndrome in adult age

Gorgojo, Juan José; Donnay, Sergio; Jeck, Nikola; Konrad, Martin (2006). A Spanish founder mutation in the chloride channel gene, CLCNKB, as a cause of atypical Bartter syndrome in adult age. Hormone research, 65(2), pp. 62-8. Basel: Karger 10.1159/000090601

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BACKGROUND: Mutations in the chloride channel gene, CLCNKB, usually cause classic Bartter syndrome (cBS) or a mixed Bartter-Gitelman phenotype in the first years of life. METHODS: We report an adult woman with atypical BS caused by a homozygous missense mutation, A204T, in the CLCNKB gene, which has previously been described as the apparently unique cause of cBS in Spain. RESULTS: The evaluation of this patient revealed an overlap of phenotypic features ranging from severe biochemical and systemic disturbances typical of cBS to scarce symptoms and diagnosis in the adult age typical of Gitelman syndrome. The tubular disease caused a dramatic effect on mental, growth and puberal development leading to low IQ, final short stature and abnormal ovarian function. Furthermore, low serum PTH concentrations with concomitant nephrocalcinosis and normocalcaemia were observed. Both ovarian function and serum PTH levels were normalized after treatment with cyclooxygenase inhibitors. CONCLUSIONS: The present report confirms a weak genotype-phenotype correlation in patients with CLCNKB mutations and supports the founder effect of the A204T mutation in Spain. In our country, the genetic diagnosis of adult patients with hereditary hypokalaemic tubulopathies should include a screening of A204T mutation in the CLCNKB gene.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > Department of Gynaecology, Paediatrics and Endocrinology (DFKE) > Clinic of Paediatric Medicine
UniBE Contributor:	Konrad, Martin
ISSN:	0301-0163
ISBN:	16391491
Publisher:	Karger
Language:	English
Submitter:	Anette van Dorland
Date Deposited:	04 Oct 2013 14:50
Last Modified:	05 Dec 2022 14:15
Publisher DOI:	10.1159/000090601
PubMed ID:	16391491
Web of Science ID:	000235209100002
URI:	https://boris.unibe.ch/id/eprint/20929 (FactScience: 4727)