| Atypical Bartter syndrome with sensorineural deafness with G47R mutation of the beta-subunit for ClC-Ka and ClC-Kb chloride channels, barttin. | |
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MedLine Citation:
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PMID: 12574213 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Bartter syndrome comprises several related renal tubular disorders including classic Bartter, infantile Bartter (IBS), and Gitelman syndrome. A new distinct group in Bartter syndrome accompanied by sensorineural deafness (BSND) has been identified among the IBS patients. Recently a gene encoding an essential beta-subunit for ClC chloride channels, named barttin, with several mutations of the gene as the cause of BSND, has been described. We have observed a male who had not been diagnosed as Bartter syndrome until 28 yr because of a mild clinical manifestation. The patient was affected with congenital deafness, which urged us to analyze his gene for barttin, and a mutation G47R, which was previously reported, has been identified. However, the clinical feature in the patient lacking the characteristic symptoms of IBS such as polyhydramnios, premature labor, or severe salt loss in neonatal period contrasts with that of the typical BSND patients described so far in the literature. This might be due to a less severe loss of function of barttin induced by G47R mutation, compared with others, and our observation seems to suggest a possibility of the prevalence of mild form BSND with various levels of barttin dysfunction among patients with congenital deafness of unknown origin. |
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Authors:
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Nobuhiro Miyamura; Kazuya Matsumoto; Tetsuya Taguchi; Hiroshi Tokunaga; Takeshi Nishikawa; Kenro Nishida; Tetsushi Toyonaga; Michiharu Sakakida; Eiichi Araki |
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Publication Detail:
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Type: Case Reports; Journal Article |
Journal Detail:
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Title: The Journal of clinical endocrinology and metabolism Volume: 88 ISSN: 0021-972X ISO Abbreviation: J. Clin. Endocrinol. Metab. Publication Date: 2003 Feb |
Date Detail:
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Created Date: 2003-02-07 Completed Date: 2003-02-28 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 0375362 Medline TA: J Clin Endocrinol Metab Country: United States |
Other Details:
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Languages: eng Pagination: 781-6 Citation Subset: AIM; IM |
Affiliation:
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Department of Metabolic Medicine, Kumamoto University School of Medicine, Kumamoto 860-8556, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Anion Transport Proteins* Bartter Syndrome / genetics* Chloride Channels / chemistry, genetics* Hearing Loss, Sensorineural / genetics* Humans Japan Male Membrane Proteins* Pedigree Point Mutation* Polymorphism, Restriction Fragment Length Protein Structure, Tertiary |
| Chemical | |
Reg. No./Substance:
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0/Anion Transport Proteins; 0/CLCNKB protein, human; 0/Chloride Channels; 0/Membrane Proteins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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