Format

Send to

Choose Destination
Am J Hum Genet. 1991 Mar;48(3):492-501.

mtDNA depletion with variable tissue expression: a novel genetic abnormality in mitochondrial diseases.

Author information

1
Department of Genetics and Development, College of Physicians and Surgeons, Columbia University, New York, NY.

Abstract

We studied two related infants with a fatal mitochondrial disease, affecting muscle in one and liver in the other. Quantitative analysis revealed a severe depletion of mtDNA in affected tissues. This genetic abnormality was also observed in muscle of an unrelated infant with myopathy and in muscle and kidney of a fourth child with myopathy and nephropathy. Biochemistry, immunohistochemistry, and in situ hybridization showed that the depletion of mtDNA in muscle fibers was correlated with a respiratory chain defect and with lack of mitochondrially translated proteins. Although the differential tissue involvement in these infants suggests mtDNA heteroplasmy, sequence analysis of mtDNA replication origins did not reveal any abnormality that could account for the low copy number.

PMID:
1998336
PMCID:
PMC1682992
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for PubMed Central
Loading ...
Support Center