منابع مشابه
Progressive depletion of mtDNA in mitochondrial myopathy.
The authors studied seven patients with mitochondrial DNA (mtDNA) myopathy. Over time, there was a progressive depletion of mtDNA, which preferentially affected wild-type mitochondrial genomes. This suggests that loss of wild-type mtDNA is a major feature of mtDNA myopathy, and preventing wild-type mtDNA depletion has treatment implications.
متن کاملIsolated distal myopathy of the upper limbs associated with mitochondrial DNA depletion and polymerase gamma mutations.
OBJECTIVE To describe an unusual clinical phenotype in an adult harboring 2 compound heterozygous polymerase γ (POLG) mutations. DESIGN Case report. SETTING University-based outpatient neurology clinic and pathology and genetics laboratory. PATIENT A 27-year-old man presenting with isolated distal myopathy of the upper extremities in the absence of sensory disturbances. RESULTS Histoche...
متن کاملMitochondrial DNA Depletion
Keywords Disease name Definition/diagnostic criteria Differential diagnosis Etiology Clinical description Frequency Diagnostic methods Genetic counselling Prenatal diagnosis Management Unresolved questions References Abstract The mtDNA depletion syndrome (MDS) is a clinically heterogeneous group of mitochondrial disorders characterized by a reduction of the mtDNA copy number in affected tissues...
متن کاملMitochondrial myopathy of childhood associated with mitochondrial DNA depletion and a homozygous mutation (T77M) in the TK2 gene.
BACKGROUND The mitochondrial DNA depletion syndrome is an autosomal recessive disorder of infancy or childhood characterized by decreased mitochondrial DNA copy number in affected tissues. Mutations in 2 genes involved in deoxyribonucleotide metabolism, the deoxyguanosine kinase gene (DGK) and the thymidine kinase 2 gene (TK2), have been related to this syndrome. OBJECTIVE To describe 3 sibli...
متن کاملSyndromes associated with mitochondrial DNA depletion
Mitochondrial dysfunction accounts for a large group of inherited metabolic disorders most of which are due to a dysfunctional mitochondrial respiratory chain (MRC) and, consequently, deficient energy production. MRC function depends on the coordinated expression of both nuclear (nDNA) and mitochondrial (mtDNA) genomes. Thus, mitochondrial diseases can be caused by genetic defects in either the...
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ژورنال
عنوان ژورنال: Pediatric Neurology Briefs
سال: 1992
ISSN: 2166-6482,1043-3155
DOI: 10.15844/pedneurbriefs-6-2-3