Myopathy with mitochondrial changes presenting as respiratory failure in two brothers

Lemos, Amelia Bargiela; Mosquera, Jorge; Maté, A.; Sirvent, Júlia Sampol

doi:10.1002/(sici)1099-0496(199903)27:3<213::aid-ppul11>3.0.co;2-l

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“…Chest radiographic and CT findings showed diffuse interstitial lung disease. 21 However, no genetic studies were performed. As suggested, the progressive development of interstitial disease in our patient may be attributable to fibrosis secondary to chest muscle dysfunction.…”

Section: Discussionmentioning

confidence: 99%

Mitochondrial Myopathy and Respiratory Failure Associated With a New Mutation in the Mitochondrial Transfer Ribonucleic Acid Glutamic Acid Gene

et al. 2003

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We report a novel T14687C mutation in the mitochondrial transfer ribonucleic acid glutamic acid gene in a 16-year-old boy with myopathy and lactic acidosis, retinopathy, and progressive respiratory failure leading to death. A muscle biopsy showed cytochrome c oxidase-negative ragged-red fibers, and biochemical analysis of the respiratory chain enzymes in muscle homogenate revealed complex I and complex IV deficiencies. The mutation, which affects the trinucleotide (TpsiC) loop, was nearly homoplasmic in the muscle DNA of the proband, but it was absent in his blood and in the blood from the asymptomatic mother, suggesting that it may have been a spontaneous somatic mutation in muscle.

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Section: Discussionmentioning

confidence: 99%