Genetic heterogeneity and exclusion of a modifying locus at 2q in a family with autosomal dominant primary erythermalgia.
Br J Dermatol
; 153(1): 174-7, 2005 Jul.
Article
in En
| MEDLINE
| ID: mdl-16029345
ABSTRACT
BACKGROUND:
Primary erythermalgia is a rare disorder characterized by recurrent attacks of red, warm and painful hands and/or feet. In a previous study we reported localization of a gene for primary erythermalgia to a 7.94-cM region on chromosome 2q. A recent study reported voltage-gated sodium channel gene SCN9a sequence variants in a family and a single individual with primary erythermalgia.OBJECTIVES:
To describe the clinical characteristics of a large three-generation family with primary erythermalgia and to test for genetic linkage to chromosome 2q.METHODS:
We collected clinical data of a 10-member three-generation family with autosomal dominant primary erythermalgia. In addition, we performed linkage analysis and searched for SCN9a variants using a restriction fragment length polymorphism assay.RESULTS:
We established the diagnosis of autosomal dominant primary erythermalgia in six of 10 family members. We excluded linkage to chromosome 2q and could not detect SCN9A variants in this family.CONCLUSIONS:
In this family with autosomal dominant primary erythermalgia, exclusion of linkage to chromosome 2q is strongly suggestive for genetic heterogeneity.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Chromosomes, Human, Pair 2
/
Genetic Heterogeneity
/
Erythromelalgia
Limits:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Language:
En
Journal:
Br J Dermatol
Year:
2005
Document type:
Article
Affiliation country:
Estados Unidos