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  MitoTALEN reduces mutant mtDNA load and restores tRNA(Ala) levels in a mouse model of heteroplasmic mtDNA mutation

Bacman, S. R., Kauppila, J. H. K., Pereira, C. V., Nissanka, N., Miranda, M., Pinto, M., et al. (2018). MitoTALEN reduces mutant mtDNA load and restores tRNA(Ala) levels in a mouse model of heteroplasmic mtDNA mutation. Nat Med, 24(11), 1696-1700. doi:10.1038/s41591-018-0166-8.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-71F5-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-765F-E
Genre: Journal Article

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Bacman, S. R.1, Author
Kauppila, J. H. K.1, Author
Pereira, C. V.1, Author
Nissanka, N.1, Author
Miranda, M.1, Author
Pinto, M.1, Author
Williams, S. L.1, Author
Larsson, N. G.1, Author
Stewart, J. B.1, Author
Moraes, C. T.1, Author
Affiliations:
1Stewart – Mitochondrial Mutations and Genome Co-evolution, Research Groups, Max Planck Institute for Biology of Ageing, Max Planck Society, Joseph-Stelzmann-Str. 9b, D-50931 Cologne, DE, ou_1942301              

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 Abstract: Mutations in the mitochondrial DNA (mtDNA) are responsible for several metabolic disorders, commonly involving muscle and the central nervous system(1). Because of the critical role of mtDNA in oxidative phosphorylation, the majority of pathogenic mtDNA mutations are heteroplasmic, co-existing with wild-type molecules(1). Using a mouse model with a heteroplasmic mtDNA mutation(2), we tested whether mitochondrial-targeted TALENs (mitoTALENs)(3,4) could reduce the mutant mtDNA load in muscle and heart. AAV9-mitoTALEN was administered via intramuscular, intravenous, and intraperitoneal injections. Muscle and heart were efficiently transduced and showed a robust reduction in mutant mtDNA, which was stable over time. The molecular defect, namely a decrease in transfer RNA(Ala) levels, was restored by the treatment. These results showed that mitoTALENs, when expressed in affected tissues, could revert disease-related phenotypes in mice.

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 Dates: 2018-112018-09-27
 Publication Status: Published in print
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 Identifiers: Other: 30250143
DOI: 10.1038/s41591-018-0166-8
ISSN: 1546-170X (Electronic)1078-8956 (Linking)
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Title: Nat Med
Source Genre: Journal
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Pages: - Volume / Issue: 24 (11) Sequence Number: - Start / End Page: 1696 - 1700 Identifier: -