Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

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Obermüller, N. et al.

The swelling-activated chloride channel ClC-2, the chloride channel ClC-3, and ClC-5, a chloride channel mutated in kidney stone disease, are expressed in distinct subpopulations of renal epithelial cells.

The mammalian genome encodes at least nine different members of the ClC family of chloride channels. So far only two of them could be localized on a cellular level in the kidney. We now report on the precise intrarenal localization of the mRNAs coding for the chloride channels ClC-2, ClC-3 and ClC-5. Expression of ClC-2 mRNA, encoding a swelling-activated chloride channel, could be demonstrated in the S3 segment of the proximal tubule. The chloride channel ClC-3 mRNA and ClC-5 mRNA, coding for a chloride channel mutated in kidney stone disease, were both expressed in intercalated cells of the connecting tubule and collecting duct. Whereas ClC-3 mRNA expression was most prominent in the cortex of rat kidneys, ClC-5 mRNA was expressed from the cortex through the upper portion of the inner medulla. A detailed analysis revealed that ClC-3 was expressed by type B intercalated cells, whereas ClC-5 was expressed by type A intercalated cells. These findings have important implications for the pathogenesis of hereditary kidney stone disease caused by mutations in the CLCN5 gene.[1]

References

The swelling-activated chloride channel ClC-2, the chloride channel ClC-3, and ClC-5, a chloride channel mutated in kidney stone disease, are expressed in distinct subpopulations of renal epithelial cells. Obermüller, N., Gretz, N., Kriz, W., Reilly, R.F., Witzgall, R. J. Clin. Invest. (1998) [Pubmed]

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