In:
Clinical Genetics, Wiley, Vol. 71, No. 4 ( 2007-04), p. 311-319
Abstract:
Congenital indifference to pain (CIP) is a rare condition in which patients have severely impaired pain perception, but are otherwise essentially normal. We identified and collected DNA from individuals from nine families of seven different nationalities in which the affected individuals meet the diagnostic criteria for CIP. Using homozygosity mapping and haplotype sharing methods, we narrowed the CIP locus to chromosome 2q24–q31, a region known to contain a cluster of voltage‐gated sodium channel genes. From these prioritized candidate sodium channels, we identified 10 mutations in the SCN9A gene encoding the sodium channel protein Na v 1.7. The mutations completely co‐segregated with the disease phenotype, and nine of these SCN9A mutations resulted in truncation and loss‐of‐function of the Na v 1.7 channel. These genetic data further support the evidence that Na v 1.7 plays an essential role in mediating pain in humans, and that SCN9A mutations identified in multiple different populations underlie CIP.
Type of Medium:
Online Resource
ISSN:
0009-9163
,
1399-0004
DOI:
10.1111/cge.2007.71.issue-4
DOI:
10.1111/j.1399-0004.2007.00790.x
Language:
English
Publisher:
Wiley
Publication Date:
2007
detail.hit.zdb_id:
2004581-5
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