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Neurology. 2000 Jul 25;55(2):275-80.

Autosomal dominant Emery-Dreifuss dystrophy due to mutations in rod domain of the lamin A/C gene.

Author information

1
Department of Neurology, Division of Human Genetics, University of Connecticut School of Medicine, Farmington, USA. felice.nso.uchc.edu

Abstract

BACKGROUND:

Autosomal dominant Emery-Dreifuss muscular dystrophy (EDMD-AD) is a disorder characterized clinically by humeropelvic weakness, contractures, and cardiomyopathy, and genetically by mutations in the lamin A/C gene on 1q21.2-q21.3. Of the 14 lamin A/C gene mutations reported thus far, the four involving the rod domain have been associated with isolated cardiomyopathy and conduction-system disease. This is the first report of rod domain mutations in patients with the full EDMD-AD phenotype.

METHODS:

Clinical, pathologic, and genetic data are provided on two families with EDMD-AD.

RESULTS:

In both families, the full clinical spectrum of EDMD-AD was demonstrated. For the proband in family 1, sequence analysis detected a mutation within exon 2 of the lamin A/C gene. The missense mutation was due to a A448C base substitution causing a Thr150Pro amino acid change. For the proband of family 2, sequence analysis detected an in-frame 3-bp deletion (AAG 778-780 or 781-783) removing one of two adjacent lysine residues (K 260 or 261) of exon 4. Both mutations were in the central rod domain of the lamin A/C gene.

CONCLUSIONS:

Mutations in the rod domain of the lamin A/C gene may cause the full clinical spectrum of EDMD-AD.

PMID:
10908904
[Indexed for MEDLINE]

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