Point mutations of the mtDNA control region in normal and neurodegenerative human brains - PubMed (original) (raw)

Point mutations of the mtDNA control region in normal and neurodegenerative human brains

P F Chinnery et al. Am J Hum Genet. 2001 Feb.

Abstract

Recent observations in cultured human fibroblasts suggest that the accumulation of point mutations in the noncoding control region of mtDNA may be important in human aging. We studied the mtDNA control region in brain tissue from 31 normal elderly individuals, from 35 individuals who had Alzheimer disease, and from 47 individuals who had dementia with Lewy bodies. We found no evidence that these somatic mtDNA point mutations accumulate either in the brains of normal elderly individuals or in the brains of individuals with neurodegenerative disease.

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Figures

Figure  1

Figure 1

The mtDNA control region, showing the position of the sequence changes seen in brain tissue isolated from elderly normal individuals (

_n_=31

) and from individuals with either AD (

_n_=35

) or DLB (

_n_=47

), at nt 100–576 (numbered according to the revised Cambridge Reference Sequence [Anderson et al. ; Andrews et al. 1999]). CSB = conserved sequence blocks; d = deletion; i = insertion; LSP = light-strand promoter; mtTFA = binding site for mitochondrial transcription factor A; OH = origin of heavy-strand replication; tRNA Phe = tRNA phenylalanine gene; tRNA Pro = tRNA proline gene.

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References

Electronic-Database Information

    1. HVR-Base of the Max Planck Institute for Evolutionary Genetics, http://www.eva.mpg.de/hvrbase/
    1. MITOMAP: a Human Mitochondrial Genome Database, http://www.gen.emory.edu/cgi-bin/MITOMAP

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