Abstract:
:Myotonic dystrophy type 1 (DM1), an autosomal dominant disease characterized by a CTG expansion in the 3' region of the DMPK gene in chromosome 19, is a highly heterogeneous disease. In this study, we present a family with early onset-classical type DM, and a homogeneous phenotype highlighted by severe neuromuscular symptoms and mental dysfunction with subcortical-type dementia. Neuroradiological abnormalities included brain atrophy, white matter lesions, and basal ganglia calcifications. A very large CTG triplet expansion was present in the DMPK locus in leukocytes in the three patients. One patient showed ragged-red fibers (RRF) and a defect complex III of the respiratory chain, but no mutations were found in the cytochrome b gene of mtDNA.
journal_name
J Neurol Scijournal_title
Journal of the neurological sciencesauthors
Seijo-Martínez M,Castro del Río M,Campos Y,Palau F,Arenas J,Teijeira S,Fernández Hojas R,Navarro Cdoi
10.1016/s0022-510x(02)00442-2subject
Has Abstractpub_date
2003-04-15 00:00:00pages
87-91issue
1-2eissn
0022-510Xissn
1878-5883pii
S0022510X02004422journal_volume
208pub_type
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