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Published on: June 15, 2011
Steroid 21-hydroxylase deficiency: two additional mutations in salt-wasting disease and rapid screening of
1Rolf Luft Center for Diabetes Research, Department of Clinical Genetics, Karolinska Hospital, Stockholm, Sweden.
Abstract:
A method for genetic diagnosis of steroid 21-hydroxylase deficiency was developed based on allele-specific PCR. With this approach, genotyping of fourteen mutations and diagnosis of homozygous gene deletions can be performed within hours from tissue sampling. One patient with salt-wasting disease had normal genotype at all positions screened. DNA sequencing revealed two novel mutations, a G to C transversion at the conserved splice donor site of intron 7 and a TGG to TAG nonsense mutation at Trp 406 in exon 9. Allele-specific PCR was established also for these mutations and used to screen for their presence in the pseudogene. However, the two novel mutations were not found in at least 34 pseudogenes.
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