Single-cell analysis of mitochondrial DNA in patients and a carrier of the tRNALeu(UUR) gene mutation
1999
We examined heteroplasmy of mutated mitochondrial DNA in single peripheral lymphocytes derived from 4 individuals carrying the nt 3243 A-to-G mutation, including two patients with MELAS, a patient with cardiomyopathy, deafness and diabetes mellitus, and the asymptomatic mother of one of the MELAS patients. In these subjects, all lymphocytes examined were heteroplasmic to different degrees, with a wider range of heteroplasmy evident in the symptomatic patients than in the healthy carrier.
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