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Pathogenetics of the Human SLC26 Transporters

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Over the past decade, 11 human genes belonging to the solute linked carrier (SLC) 26 family of transporters, have been identified. The SLC26 proteins, which include SAT-1, DTDST, DRA / CLD, pendrin, prestin, PAT-1 / CFEX and Tat-1, are structurally related and have been shown to transport one or more of the following substrates: sulfate, chloride, bicarbonate, iodide, oxalate, formate, hydroxyl or fructose. Special interest has focused on four members of the SLC26 family that are associated with distinct recessive diseases: (i) Mutations in SLC26A2 lead to four different chondrodysplasias (diastrophic dysplasia, atelosteogenesis type II, achondrogenesis type IB and multiple epiphyseal dysplasia); (ii) SLC26A3 is associated with congenital chloride diarrhea; (iii) SLC26A4 is associated with Pendred syndrome and non-syndromic deafness, DFNB4; and (iv) SLC26A5 is defective in non-syndromic hearing impairment. This review article summarizes current information on the pathophysiological consequences of mutations in the human SLC26A2 to A5 genes.

Keywords: chondrodysplasia; deafness; diarrhea; sulfate; transporter

Document Type: Review Article


Affiliations: School of Biomedical Sciences, Department of Physiology and Pharmacology, University of Queensland, St. Lucia, QLD 4072, Australia.

Publication date: 2005-02-01

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