K. Wulff et al., DIRECT MOLECULAR-GENETIC DIAGNOSIS AND HETEROZYGOTE IDENTIFICATION INX-LINKED EMERY-DREIFUSS MUSCULAR-DYSTROPHY BY HETERODUPLEX ANALYSIS, Disease markers, 13(2), 1997, pp. 77-86
X-linked Emery-Dreifuss muscular dystrophy (EMD) is a very rare, relat
ively benign muscle disorder. The disease is associated with potential
ly lethal cardiac arrhythmias in affected males and some heterozygous
females. X-linked EMD can be genetically distinguished from phenotypic
ally similar autosomal EMD. Heterogenic mutations are identified as th
e cause of X-linked EMD. We introduced heteroduplex analysis to follow
the segregation of heterogenic emerin gene mutations in the families
of six unrelated EMD patients. Heteroduplex analysis was proved to be
a simple, fast and reliable tool for direct molecular genetic diagnosi
s of EMD in male patients and identification of heterozygotes even in
families where affected males are not available as index cases.