Deleted 4977-bp mitochondrial DNA mutation is associated with sporadic amyotrophic lateral sclerosis: a hospital-based case-control study.
We investigated the relationship between the most common 4977-bp deleted mitochondrial DNA (mtDNA) mutations and the occurrence of sporadic amyotrophic lateral sclerosis (ALS). Primer-shift and quantitative polymerase chain reaction (PCR) were used to determine the 4977-bp deleted mtDNA in the muscle specimens from 36 patients with sporadic ALS and 69 age-matched controls with other neuromuscular disorders. We found that the 4977-bp deleted mtDNA mutations were significantly higher in the ALS patients than controls in both frequency (50.0% vs. 8.7%, P < 0.01) and amount (0.35 +/- 0.53% vs. 0.085 +/- 0.35%, P < 0.05). Subjects with, rather than without, deleted mtDNA were at a significantly higher risk for having ALS after adjustment for age and sex. Moreover, male subjects had a higher risk than female subjects of having sporadic ALS. This study suggested that 4977-bp deleted mtDNA is significantly associated with the occurrence of sporadic ALS.
Ro
Long-Sun
LS
Department of Neurology, Chang Gung Memorial Hospital, 199 Tung Hwa North Road, Taipei, Taiwan 10591, ROC. cgrols@adm.cgmh.com.tw
Lai
Shiao-Lin
SL
Chen
Chiung-Mei
CM
Chen
Sien-Tsong
ST
D000368:Aged; D000690:Amyotrophic Lateral Sclerosis / Q000235:genetics* / Q000473:pathology; D016022:Case-Control Studies; D004272:DNA, Mitochondrial / Q000235:genetics*; D005260:Female; D017353:Gene Deletion; D005787:Gene Frequency; D006801:Humans; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000378:metabolism / Q000473:pathology; D009154:Mutation / Q000235:genetics*; D011451:Prostaglandin-Endoperoxide Synthases / Q000378:metabolism; D012044:Regression Analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012727:Sex Characteristics
D004272:DNA, Mitochondrial; D011451:Prostaglandin-Endoperoxide Synthases