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J Mol Diagn. 2003 Nov;5(4):197-208.

Techniques and pitfalls in the detection of pathogenic mitochondrial DNA mutations.

Author information

1
Department of Neurology, University of Miami School of Medicine, Miami, Florida 33136, USA. cmoraes@med.miami.edu

Abstract

Mutations in the mitochondrial DNA (mtDNA) are now recognized as major contributors to human pathologies and possibly to normal aging. A large number of rearrangements and point mutations in protein coding and tRNA genes have been identified in patients with mitochondrial disorders. In this review, we discuss genotype-phenotype correlations in mitochondrial diseases and common techniques used to identify pathogenic mtDNA mutations in human tissues. Although most of these approaches employ standard molecular biology tools, the co-existence of wild-type and mutated mtDNA (mtDNA heteroplasmy) in diseased tissues complicates both the detection and accurate determination of the size of the mutated fractions. To address these problems, novel approaches were developed and are discussed in this review.

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PMID:
14573777
PMCID:
PMC1907336
DOI:
10.1016/S1525-1578(10)60474-6
[Indexed for MEDLINE]
Free PMC Article

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