A pseudo-dominant form of Gitelman’s syndrome
2011
Gitelman’s syndrome is an autosomal recessive salt losing nephropathy caused by inactivated mutations of the SLC12A3 gene, encoding the NaCl
cotransporterof the
distal convoluted tubule. We report a French family with five affected members over two generations suggesting a dominant transmission. After SLC12A3 sequencing of seven individuals, four mutations were detected. Pseudo-dominant transmission was explained by the union of a compound heterozygous woman (two mutations on one allele and one mutation on the other) with a heterozygous healthy man. This study shows the importance of complete
genetic analysisof families with unusual presentation.
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