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- W2087922963 abstract "The purpose of this study was to evaluate the energy metabolism and mitochondrial function in skeletal muscle from patients with Mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes (MELAS) or chronic progressive external ophthalmoplegia (CPEO) using phosphorus magnetic resonance spectroscopy ((31)P-MRS), to determine whether abnormally increasing cytochrome c oxidase (COX), as detected in muscle biopsy, could be a cause for MELAS.(31)P-MRS was performed on the quadriceps femoris muscle of 12 healthy volunteers and 11 patients diagnosed as MELAS or CPEO by muscle biopsy and genetic analysis. All subjects experienced a state of rest, 5-min exercise, and 5-min recovery protocol in a supine position.Compared to CPEO, MELAS patients typically exhibited COX-positive ragged-red fibers (RRFs) as well as strongly SDH-positive blood vessels (SSVs). However, based on (31)P-MRS results, MELAS showed a higher inorganic phosphate (Pi)/phosphocreatine (PCr) ratio and lower ATP/PCr ratio during exercise and delayed Pi/PCr and ATP/PCr recovery to normal.This study suggests that high COX expression contributes to severe skeletal energy failure by (31)P-MRS spectroscopy in MELAS." @default.
- W2087922963 created "2016-06-24" @default.
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- W2087922963 date "2014-03-27" @default.
- W2087922963 modified "2023-09-30" @default.
- W2087922963 title "High Cytochrome c Oxidase Expression Links to Severe Skeletal Energy Failure by31P-MRS Spectroscopy in Mitochondrial Encephalomyopathy, Lactic Acidosis, and Stroke-Like Episodes" @default.
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- W2087922963 doi "https://doi.org/10.1111/cns.12257" @default.
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