A founder ectodysplasin A receptor (EDAR) mutation results in a high frequency of the autosomal recessive form of hypohidrotic ectodermal dysplasia in India.
Br J Dermatol
; 166(4): 819-29, 2012 Apr.
Article
in En
| MEDLINE
| ID: mdl-22032522
ABSTRACT
BACKGROUND:
Hypohidrotic/anhidrotic ectodermal dysplasia (HED) is a rare Mendelian disorder affecting ectodermal tissues. The disease is primarily caused by inactivation of any one of three genes, namely ectodysplasin A1 (EDA-A1), which encodes a ligand belonging to the tumour necrosis factor (TNF) superfamily; ectodysplasin A receptor (EDAR), encoding the EDA-A1 receptor and ectodysplasin A receptor-associated death domain (EDARADD), encoding an adaptor protein. X-linked recessive (EDA-A1), the predominant form of HED, as well as autosomal recessive and dominant (EDAR and EDARADD) inheritance patterns have been identified in affected families.OBJECTIVES:
To determine the common genes causing HED in India.METHODS:
We performed mutation analysis on 26 HED families from India (including 30 patients). In addition, we carried out sequence and structural analysis of missense/nonsense and insertion/deletion mutations.RESULTS:
Among the 26 families analysed, disease-causing EDAR mutations were identified in 12 (46%) while EDA-A1 mutations were detected in 11 (42%). Four novel mutations in EDAR and five in EDA-A1 were identified. More importantly, a possible founder EDAR mutation, namely c.1144G>A, was identified in five independent families, thus accounting for about one-fifth of affected families in whom mutation was detected. A majority of EDA-A1 mutations localized to the TNF-like domain while the location of EDAR mutations was more widespread.CONCLUSIONS:
This is the first report of a founder EDAR mutation and of a significantly high frequency of autosomal recessive HED.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Ectodermal Dysplasia, Hypohidrotic, Autosomal Recessive
/
Receptors, Ectodysplasin
/
Mutation
Type of study:
Prognostic_studies
Limits:
Adolescent
/
Adult
/
Child
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Child, preschool
/
Female
/
Humans
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Infant
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Male
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Middle aged
/
Newborn
Country/Region as subject:
Asia
Language:
En
Journal:
Br J Dermatol
Year:
2012
Document type:
Article
Affiliation country:
India