Publication Date:
2010-03-05
Description:
The presence of hundreds of copies of mitochondrial DNA (mtDNA) in each human cell poses a challenge for the complete characterization of mtDNA genomes by conventional sequencing technologies. Here we describe digital sequencing of mtDNA genomes with the use of massively parallel sequencing-by-synthesis approaches. Although the mtDNA of human cells is considered to be homogeneous, we found widespread heterogeneity (heteroplasmy) in the mtDNA of normal human cells. Moreover, the frequency of heteroplasmic variants varied considerably between different tissues in the same individual. In addition to the variants identified in normal tissues, cancer cells harboured further homoplasmic and heteroplasmic mutations that could also be detected in patient plasma. These studies provide insights into the nature and variability of mtDNA sequences and have implications for mitochondrial processes during embryogenesis, cancer biomarker development and forensic analysis. In particular, they demonstrate that individual humans are characterized by a complex mixture of related mitochondrial genotypes rather than a single genotype.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3176451/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3176451/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉He, Yiping -- Wu, Jian -- Dressman, Devin C -- Iacobuzio-Donahue, Christine -- Markowitz, Sanford D -- Velculescu, Victor E -- Diaz, Luis A Jr -- Kinzler, Kenneth W -- Vogelstein, Bert -- Papadopoulos, Nickolas -- CA 43460/CA/NCI NIH HHS/ -- CA 62924/CA/NCI NIH HHS/ -- CA121113/CA/NCI NIH HHS/ -- CA57345/CA/NCI NIH HHS/ -- P50 CA062924/CA/NCI NIH HHS/ -- P50 CA062924-06/CA/NCI NIH HHS/ -- R01 CA057345/CA/NCI NIH HHS/ -- R01 CA057345-08/CA/NCI NIH HHS/ -- R01 CA121113/CA/NCI NIH HHS/ -- R01 CA121113-04/CA/NCI NIH HHS/ -- R37 CA043460/CA/NCI NIH HHS/ -- R37 CA043460-16/CA/NCI NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2010 Mar 25;464(7288):610-4. doi: 10.1038/nature08802. Epub 2010 Mar 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Ludwig Center for Cancer Genetics and Therapeutics and The Howard Hughes Medical Institute at The Johns Hopkins Kimmel Cancer Center, Baltimore, Maryland 21231, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20200521" target="_blank"〉PubMed〈/a〉
Keywords:
Adult
;
Aged
;
Child
;
Colorectal Neoplasms/*pathology
;
DNA, Mitochondrial/blood/*genetics
;
Female
;
Gene Frequency
;
*Genetic Heterogeneity
;
Genetic Variation
;
Genotype
;
Humans
;
Intestinal Mucosa/cytology/pathology
;
Male
;
Middle Aged
;
Mutation/*genetics
Print ISSN:
0028-0836
Electronic ISSN:
1476-4687
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
