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DOI: 10.1055/s-2004-826001
Identifizierung von zwei heterozygoten Mutationen im SLC26A4/PDS-Gen einer Familie mit Pendred-Syndrom
Identification of Two Heterozygous Mutations in the SLC26A4/PDS Gene in a Family with Pendred-SyndromePublication History
Eingegangen: 8. Juni 2004
Angenommen: 10. August 2004
Publication Date:
21 December 2004 (online)

Zusammenfassung
Hintergrund: Das Pendred-Syndrom ist eine autosomal rezessiv vererbte Erkrankung. Neben einer Schwerhörigkeit und einer Schilddrüsenfunktionsstörung tritt auch eine Fehlbildung des Innenohrs, ein erweiterter Aquaeductus vestibularis auf. Das Gen SLC26A4/PDS für das Pendred-Syndrom wurde durch „linkage analysis” auf Chromosom 7q31 kartiert. Dieses Protein wird im Innenohr, in der Schilddrüse, Niere und Plazenta exprimiert. Funktionelle Untersuchungen nach Expression von Pendrin in Xenopus-laevis-Oocyten zeigten, dass es sich bei dem Genprodukt (Pendrin) um einen Jodid/Chlorid bzw. Jodid/Format-Transporter handelt.
Methode: Der Nachweis der Mutationen erfolgte durch direkte Sequenzierung der kodierenden Exone einschließlich der Intron-Übergänge.
Ergebnis: In der beteiligten Familie konnten zwei heterozygote Mutationen nachgewiesen werden, die in Kombination bei den betroffenen Patienten zur fortschreitenden Schwerhörigkeit und Taubheit führten.
Schlussfolgerung: Bei Hinweisen oder Vorliegen von familiären Defekten, d. h. einer heterozygoten Mutation im SLC26A4/PDS-Gen, ist es sinnvoll, Neugeborene möglichst frühzeitig auf Defekte im Gen zu untersuchen, um rechtzeitig eine optimale und qualifizierte Betreuung der Sprachentwicklung durch Hörhilfen bis hin zur CI-Implantation einzuleiten.
Abstract
Background: Pendred-syndrome is an autosomal recessive disease that is classically characterised by sensorineural hearing loss and enlargement of the thyroid gland. The gene SLC26A4/PDS for the pendred-syndrome has been localised by linkage analysis on chromosome 7q31. This protein is expressed in the inner ear, thyroid gland, kidney and placenta. Functional analysis in Xenopus laevis oocytes revealed that it acts as an iodide/chloride and chloride/formate exchanger.
Method: Each of the exons and flanking splice regions of the SLC26A4/PDS gene was analysed by direct sequencing.
Results: In the involved family two heterozygous mutations could be detected which results by combination in hearing loss and deafness.
Conclusion: By evidences of familial background in hearing loss and thyroid disorder it is reasonable to analyse the PDS gene for mutation to have early the possibility for medical care of linguistic development through hearing aid or CI-implantation.
Schlüsselwörter
Pendred-Syndrom - SLC26A4/PDS-Gen - Mutationsanalyse
Key words
Pendred-Syndrome - SLC26A4/PDS gene - mutationsanalysis
Literatur
- 1 Everett L A, Glaser B, Beck J C, Idol J R, Buchs A, Heyman M, Adawi F, Hazani E, Nassir E, Baxevanis A D, Sheffield V C, Green E D. Pendred syndrome is caused by mutations in a putative sulphate transporter gene (PDS). Nat Genet. 1997 Dec; 17(4) 411-422
- 2 Phelps P D, Coffey R A, Trembath R C, Luxon L M, Grossman A B, Britton K E, Kendall-Taylor P, Graham J M, Cadge B C, Stephens S G, Pembrey M E, Reardon W. Radiological malformations of the ear in Pendred syndrome. Clin Radiol . 1998 Apr; 53(4) 268-273
- 3 Reardon W, Coffey R, Chowdhury T, Grossman A, Jan H, Britton K, Kendall-Taylor P, Trembath R. Prevalence, age of onset, and natural history of thyroid disease in Pendred syndrome. J Med Genet. 1999 Aug; 36(8) 595-598
- 4 Reardon W, Coffey R, Phelps P D, Luxon L M, Stephens D, Kendall-Taylor P, Britton K E, Grossman A, Trembath R. Pendred syndrome - 100 years of underascertainment?. QJM. 1997 Jul; 90(7) 443-447
- 5 Abe S, Usami S, Hoover D M, Cohn E, Shinkawa H, Kimberling W J. Fluctuating sensorineural hearing loss associated with enlarged vestibular aqueduct maps to 7q31, the region containing the Pendred gene. Am J Med Genet. 1999 Feb 12; 82(4) 322-328
-
6 Pendred Syndrome Homepage 2003. http://www.medicine.uiowa.edu/pendredandbor/.
- 7 Fugazzola L, Mannavola D, Cerutti N, Maghnie M, Pagella F, Bianchi P, Weber G, Persani L, Beck-Peccoz P. Molecular analysis of the Pendred's syndrome gene and magnetic resonance imaging studies of the inner ear are essential for the diagnosis of true Pendred's syndrome. J Clin Endocrinol Metab. 2000 Jul; 85(7) 2469-2475
- 8 Coyle B, Reardon W, Herbrick J A, Tsui L C, Gausden E, Lee J, Coffey R, Grueters A, Grossman A, Phelps P D, Luxon L, Kendall-Taylor P, Scherer S W, Trembath R C. Molecular analysis of the PDS gene in Pendred syndrome. Hum Mol Genet. 1998 Jul; 7(7) 1105-1112
- 9 Van Hauwe P, Everett L A, Coucke P, Scott D A, Kraft M L, Ris-Stalpers C, Bolder C, Otten B, de Vijlder J J, Dietrich N L, Ramesh A, Srisailapathy S C, Parving A, Cremers C W, Willems P J, Smith R J, Green E D, Van Camp G. Two frequent missense mutations in Pendred syndrome. Hum Mol Genet. 1998 Jul; 7(7) 1099-1104
- 10 Reardon W, O'Mahoney C F, Trembath R, Jan H, Phelps P D. Enlarged vestibular aqueduct: a radiological marker of pendred syndrome, and mutation of the PDS gene. QJM. 2000 Feb; 93(2) 99-104
- 11 Campbell C, Cucci R A, Prasad S, Green G E, Edeal J B, Galer C E, Karniski L P, Sheffield V C, Smith R J. Pendred syndrome, DFNB4, and PDS/SLC26A4 identification of eight novel mutations and possible genotype-phenotype correlations. Hum Mutat. 2001 May; 17(5) 403-411
- 12 Scott D A, Wang R, Kreman T M, Andrews M, McDonald J M, Bishop J R, Smith R J, Karniski L P, Sheffield V C. Functional differences of the PDS gene product are associated with phenotypic variation in patients with Pendred syndrome and non-syndromic hearing loss (DFNB4). Hum Mol Genet. 2000 Jul 1; 9(11) 1709-1715
- 13 Prasad S, Kolln K A, Cucci R A, Trembath R C, Van Camp G, Smith R J. Pendred syndrome and DFNB4-mutation screening of SLC26A4 by denaturing high-performance liquid chromatography and the identification of eleven novel mutations. Am J Med Genet. 2004 Jan 1; 124A(1) 1-9
- 14 Pickering-Brown S, Baker M, Bird T, Trojanowski J, Lee V, Morris H, Rossor M, Janssen J C, Neary D, Craufurd D, Richardson A, Snowden J, Hardy J, Mann D, Hutton M. Evidence of a founder effect in families with frontotemporal dementia that harbor the tau + 16 splice mutation. Am J Med Genet. 2004 Feb 15; 125B(1) 79-82
- 15 Everett L A, Morsli H, Wu D K, Green E D. Expression pattern of the mouse ortholog of the Pendred's syndrome gene (Pds) suggests a key role for pendrin in the inner ear. Proc Natl Acad Sci USA. 1999 Aug 17; 96(17) 9727-9732
- 16 Royaux I E, Wall S M, Karniski L P, Everett L A, Suzuki K, Knepper M A, Green E D. Pendrin, encoded by the Pendred syndrome gene, resides in the apical region of renal intercalated cells and mediates bicarbonate secretion. Proc Natl Acad Sci USA.. 2001 Mar 27; 98(7) 4221-4226
- 17 Soleimani M, Greeley T, Petrovic S, Wang Z, Amlal H, Kopp P, Burnham C E. Pendrin: an apical Cl-/OH-/HCO3-exchanger in the kidney cortex. Am J Physiol Renal Physiol. 2001 Feb; 280(2) F356-364
- 18 Royaux I E, Suzuki K, Mori A, Katoh R, Everett L A, Kohn L D, Green E D. Pendrin, the protein encoded by the Pendred syndrome gene (PDS), is an apical porter of iodide in the thyroid and is regulated by thyroglobulin in FRTL-5 cells. Endocrinology. 2000 Feb; 141(2) 839-845
- 19 Bidart J M, Mian C, Lazar V, Russo D, Filetti S, Caillou B, Schlumberger M. Expression of pendrin and the Pendred syndrome (PDS) gene in human thyroid tissues. J Clin Endocrinol Metab. 2000 May; 85(5) 2028-2033
- 20 Suzuki K, Royaux I E, Everett L A, Mori-Aoki A, Suzuki S, Nakamura K, Sakai T, Katoh R, Toda S, Green E D, Kohn L D. Expression of PDS/Pds, the Pendred syndrome gene, in endometrium. J Clin Endocrinol Metab. 2002 Feb; 87(2) 938
- 21 Scott D A, Wang R, Kreman T M, Sheffield V C, Karniski L P. The Pendred syndrome gene encodes a chloride-iodide transport protein. Nat Genet. 1999 Apr; 21(4) 440-443
- 22 Scott D A, Karniski L P. Human pendrin expressed in Xenopus laevis oocytes mediates chloride/formate exchange. Am J Physiol Cell Physiol. 2000 Jan; 278(1) C207-211
- 23 Everett L A, Belyantseva I A, Noben-Trauth K, Cantos R, Chen A, Thakkar S I, Hoogstraten-Miller S L, Kachar B, Wu D K, Green E D. Targeted disruption of mouse Pds provides insight about the inner-ear defects encountered in Pendred syndrome. Hum Mol Genet. 2001 Jan 15; 10(2) 153-161
Dr. Ralf Birkenhäger
Universitätsklinik für Hals-, Nasen- und Ohrenheilkunde und Poliklinik · Universitätsklinikum Freiburg
Killianstraße 5 · 79106 Freiburg
Email: birkenhaeger@hno.ukl.uni-freiburg.de