Nat Genet. 2006 May;38(5):515-7. Epub 2006 Apr 9.

High levels of mitochondrial DNA deletions in substantia nigra neurons in aging and Parkinson disease.

Bender A, Krishnan KJ, Morris CM, Taylor GA, Reeve AK, Perry RH, Jaros E, Hersheson JS, Betts J, Klopstock T, Taylor RW, Turnbull DM.

Source

Mitochondrial Research Group, School of Neurology, Neurobiology and Psychiatry, The Medical School, University of Newcastle upon Tyne, Newcastle upon Tyne, NE2 4HH, UK.

Abstract

Here we show that in substantia nigra neurons from both aged controls and individuals with Parkinson disease, there is a high level of deleted mitochondrial DNA (mtDNA) (controls, 43.3% +/- 9.3%; individuals with Parkinson disease, 52.3% +/- 9.3%). These mtDNA mutations are somatic, with different clonally expanded deletions in individual cells, and high levels of these mutations are associated with respiratory chain deficiency. Our studies suggest that somatic mtDNA deletions are important in the selective neuronal loss observed in brain aging and in Parkinson disease.

Comment in

mtDNA clock runs out for dopaminergic neurons. [Nat Genet. 2006]
mtDNA clock runs out for dopaminergic neurons.Manfredi G. Nat Genet. 2006 May; 38(5):507-8.

PMID:: 16604074; [PubMed - indexed for MEDLINE]

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Research Support, Non-U.S. Gov't

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DNA, Mitochondrial

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