A conditional knockout rat resource of mitochondrial protein-coding genes via a DdCBE-induced premature stop codon.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37058569.
- Also identified by DOI 10.1126/sciadv.adf2695 and PMC identifier 10104465.
- Licence recorded as CC BY-NC.
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Abstract
Hundreds of pathogenic variants of mitochondrial DNA (mtDNA) have been reported to cause mitochondrial diseases, which still lack effective treatments. It is a huge challenge to install these mutations one by one. We repurposed the DddA-derived cytosine base editor to incorporate a premature stop codon in the mtProtein-coding genes to ablate mitochondrial proteins encoded in the mtDNA (mtProteins) instead of installing pathogenic variants and generated a library of both cell and rat resources with mtProtein depletion. In vitro, we depleted 12 of 13 mtProtein-coding genes with high efficiency and specificity, resulting in decreased mtProtein levels and impaired oxidative phosphorylation. Moreover, we generated six conditional knockout rat strains to ablate mtProteins using <i>Cre/loxP</i> system. Mitochondrially encoded ATP synthase membrane subunit 8 and NADH:ubiquinone oxidoreductase core subunit 1 were specifically depleted in heart cells or neurons, resulting in heart failure or abnormal brain development. Our work provides cell and rat resources for studying the function of mtProtein-coding genes and therapeutic strategies.
Medical subject headings
- Codon, Nonsense
- Mitochondria