Mutations of the emerin gene have been associated with X-linked Emery-Dreifuss muscular dystrophy clinically defined by early joint contractures, progressive muscle weakness, and cardiomyopathy.
A screening for mutation in the X-linked Emery-Dreifuss muscular dystrophy (X-EMD) gene was performed among patients affected with severe heart rhythm defects and/or dilated cardiomyopathy.
We present here the relationship between emerin protein expression, nuclear localization and clinical phenotype for two distal mutations identified in unrelated EDMD patients.
To describe the clinical variability of X-linked Emery-Dreifuss muscular dystrophy (X-EDMD) with cardiac involvement in a four-generation family with a novel mutation in the STA gene.
A 46-year-old patient with X-EDMD due to the known splice-site mutation c.449 + 1G>A in the emerin gene experienced palpitations for the first time at the age of 21 years, and a first syncope at the age of 23 years.
X-linked Emery-Dreifuss muscular dystrophy is usually caused by absence of the nuclear membrane protein, emerin, due to nonsense mutations or deletions, but a few missense mutations also exist.
Furthermore, we are the first to report that emerin mutations which give rise to X-linked Emery-Dreifuss muscular dystrophy, disrupt binding to both nesprin-1alpha and -2beta isoforms, further indicating a role of nesprins in the pathology of Emery-Dreifuss muscular dystrophy.
More than 100 genetic mutations causing X-linked Emery-Dreifuss muscular dystrophy have been identified in the gene encoding the integral inner nuclear membrane protein emerin.
Lamin A/C mutations cause the autosomal-dominant form of EDMD, limb-girdle muscular dystrophy with atrioventricular conduction disturbances (type 1B), hypertrophic cardiomyopathy and Dunnigan-type familial partial lipodystrophy.
To describe the clinical variability of X-linked Emery-Dreifuss muscular dystrophy (X-EDMD) with cardiac involvement in a four-generation family with a novel mutation in the STA gene.
We report a striking abundance of rimmed vacuoles in two brothers with X-linked Emery-Dreifuss muscular dystrophy (X-EDMD) confirmed by the absence of emerin at the muscular nuclear envelope and by genetic analysis showing a new 2-bp deletion in exon 6 of the STA gene at the Xq28 region.