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Cell identity and nucleo-mitochondrial genetic context modulate OXPHOS performance and determine somatic heteroplasmy dynamics

AuthorsLechuga-Vieco, Ana V.; Latorre-Pellicer, Ana; Johnston, Iain G.; Prota, Gennaro; Gileadi, Uzi; Justo-Méndez, Raquel; Acín-Pérez, Rebeca; Martínez-De-Mena, Raquel; Fernández-Toro, José María; Jiménez-Blasco, Daniel; Mora, Alfonso; Nicolás-Ávila, José A.; Santiago, Demetrio J.; Priori, Silvia G.; Bolaños, Juan P. CSIC ORCID; Sabio, Guadalupe; Criado, Luis M.; Ruiz-Cabello, Jesús; Cerundolo, Vincenzo; Jones, Nick S.; Enríquez, José Antonio
Issue Date29-Jul-2020
PublisherAmerican Association for the Advancement of Science
CitationScience advances 6(31): eaba5345 (2020)
AbstractHeteroplasmy, multiple variants of mitochondrial DNA (mtDNA) in the same cytoplasm, may be naturally generated by mutations but is counteracted by a genetic mtDNA bottleneck during oocyte development. Engineered heteroplasmic mice with nonpathological mtDNA variants reveal a nonrandom tissue-specific mtDNA segregation pattern, with few tissues that do not show segregation. The driving force for this dynamic complex pattern has remained unexplained for decades, challenging our understanding of this fundamental biological problem and hindering clinical planning for inherited diseases. Here, we demonstrate that the nonrandom mtDNA segregation is an intracellular process based on organelle selection. This cell type-specific decision arises jointly from the impact of mtDNA haplotypes on the oxidative phosphorylation (OXPHOS) system and the cell metabolic requirements and is strongly sensitive to the nuclear context and to environmental cues.
Publisher version (URL)
Identifiersdoi: 10.1126/sciadv.aba5345
e-issn: 2375-2548
Appears in Collections:(IBFG) Artículos

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