Chronic progressive external ophthalmoplegia: A correlative study of quantitative molecular data and histochemical and biochemical profile
Articolo
Data di Pubblicazione:
1994
Citazione:
Chronic progressive external ophthalmoplegia: A correlative study of quantitative molecular data and histochemical and biochemical profile / A. Fassati, A. Bordoni, P. Amboni, F. Fortunato, G. Fagiolari, N. Bresolin, A. Prelle, G. Comi, G. Scarlato. - In: JOURNAL OF THE NEUROLOGICAL SCIENCES. - ISSN 0022-510X. - 123:1-2(1994), pp. 140-146.
Abstract:
We studied muscle biopsies of 5 patients with Kearns-Sayre syndrome and 3 patients with chronic progressive external ophthalmoplegia all with the common deletion. Steady state levels of normal and deleted mitochondrial DNA (mtDNA) measured in each patient by quantitative PCR were correlated with histochemical and biochemical features. We found that (1) normal mtDNA levels were higher in many patients than in controls; (2) as levels of deleted mtDNA increased, so did levels of normal mtDNA; (3) cytochrome c oxidase (COX) activity and the percentage of COX negative fibers were both related to the levels of deleted mtDNA; and (4) as percentage of ragged red fibers increased, so did levels of total, deleted and normal mtDNA. The quantity of deleted mtDNA plays a key role in determining the severity of COX deficiency, which is responsible for the overaccumulation of mitochondria in muscle.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
ophthalmoplegia; kearns-sayre syndrome; neuromuscular disease; MTDNA; cytochrome C oxidase deficiency; PCR; skeletal muscle
Elenco autori:
A. Fassati, A. Bordoni, P. Amboni, F. Fortunato, G. Fagiolari, N. Bresolin, A. Prelle, G. Comi, G. Scarlato
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