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Pravenec M, Hyakukoku M, Houstek J, Zidek V, Landa V, Mlejnek P, Miksik I, Dudová-Mothejzikova K, Pecina P, Vrbacký M, Drahota Z, Vojtiskova A, Mracek T, Kazdova L, Oliyarnyk O, Wang J, Ho C, Qi N, Sugimoto K, Kurtz T. Direct linkage of mitochondrial genome variation to risk factors for type 2 diabetes in conplastic strains. Genome Res 2007; 17:1319-26. [PMID: 17693571 PMCID: PMC1950900 DOI: 10.1101/gr.6548207] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Recently, the relationship of mitochondrial DNA (mtDNA) variants to metabolic risk factors for diabetes and other common diseases has begun to attract increasing attention. However, progress in this area has been limited because (1) the phenotypic effects of variation in the mitochondrial genome are difficult to isolate owing to confounding variation in the nuclear genome, imprinting phenomena, and environmental factors; and (2) few animal models have been available for directly investigating the effects of mtDNA variants on complex metabolic phenotypes in vivo. Substitution of different mitochondrial genomes on the same nuclear genetic background in conplastic strains provides a way to unambiguously isolate effects of the mitochondrial genome on complex traits. Here we show that conplastic strains of rats with identical nuclear genomes but divergent mitochondrial genomes that encode amino acid differences in proteins of oxidative phosphorylation exhibit differences in major metabolic risk factors for type 2 diabetes. These results (1) provide the first direct evidence linking naturally occurring variation in the mitochondrial genome, independent of variation in the nuclear genome and other confounding factors, to inherited variation in known risk factors for type 2 diabetes; and (2) establish that spontaneous variation in the mitochondrial genome per se can promote systemic metabolic disturbances relevant to the pathogenesis of common diseases.
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Affiliation(s)
- Michal Pravenec
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague 142 20, Czech Republic
| | - Masaya Hyakukoku
- Second Department of Medicine, Sapporo Medical University, Sapporo 060-8543, Japan
- Department of Laboratory Medicine, University of California, San Francisco, California 94107, USA
| | - Josef Houstek
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague 142 20, Czech Republic
| | - Vaclav Zidek
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague 142 20, Czech Republic
| | - Vladimir Landa
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague 142 20, Czech Republic
| | - Petr Mlejnek
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague 142 20, Czech Republic
| | - Ivan Miksik
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague 142 20, Czech Republic
| | | | - Petr Pecina
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague 142 20, Czech Republic
| | - Marek Vrbacký
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague 142 20, Czech Republic
| | - Zdenek Drahota
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague 142 20, Czech Republic
| | - Alena Vojtiskova
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague 142 20, Czech Republic
| | - Tomas Mracek
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague 142 20, Czech Republic
| | - Ludmila Kazdova
- Institute for Clinical and Experimental Medicine, Prague 140 21, Czech Republic
| | - Olena Oliyarnyk
- Institute for Clinical and Experimental Medicine, Prague 140 21, Czech Republic
| | - Jiaming Wang
- Department of Laboratory Medicine, University of California, San Francisco, California 94107, USA
| | - Christopher Ho
- Department of Laboratory Medicine, University of California, San Francisco, California 94107, USA
| | - Nathan Qi
- Department of Medicine, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA
| | - Ken Sugimoto
- Department of Geriatric Medicine, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
| | - Theodore Kurtz
- Department of Laboratory Medicine, University of California, San Francisco, California 94107, USA
- Corresponding author.E-mail ; fax (801) 912-3103
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