Mice lacking the mitochondrial exonuclease MGME1 accumulate mtDNA deletions without developing progeria.
Mice lacking the mitochondrial exonuclease MGME1 accumulate mtDNA deletions without developing progeria.
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DOI:
10.1038/s41467-018-03552-x
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发表时间:
2018-03-23
影响因子:
16.6
通讯作者:
Milenkovic D
中科院分区:
文献类型:
--
作者:
Matic S;Jiang M;Nicholls TJ;Uhler JP;Dirksen-Schwanenland C;Polosa PL;Simard ML;Li X;Atanassov I;Rackham O;Filipovska A;Stewart JB;Falkenberg M;Larsson NG;Milenkovic D
Replication of mammalian mitochondrial DNA (mtDNA) is an essential process that requires high fidelity and control at multiple levels to ensure proper mitochondrial function. Mutations in the mitochondrial genome maintenance exonuclease 1 (MGME1) gene were recently reported in mitochondrial disease patients. Here, to study disease pathophysiology, we generated Mgme1 knockout mice and report that homozygous knockouts develop depletion and multiple deletions of mtDNA. The mtDNA replication stalling phenotypes vary dramatically in different tissues of Mgme1 knockout mice. Mice with MGME1 deficiency accumulate a long linear subgenomic mtDNA species, similar to the one found in mtDNA mutator mice, but do not develop progeria. This finding resolves a long-standing debate by showing that point mutations of mtDNA are the main cause of progeria in mtDNA mutator mice. We also propose a role for MGME1 in the regulation of replication and transcription termination at the end of the control region of mtDNA. It has been debated whether premature ageing in mitochondrial DNA mutator mice is driven by point mutations or deletions of mtDNA. Matic et al generate Mgme1 knockout mice and show here that these mice have tissue-specific replication stalling and accumulate deleted mtDNA, without developing progeria.
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影响因子:
4.5
作者:
Ameur A;Stewart JB;Freyer C;Hagström E;Ingman M;Larsson NG;Gyllensten U
通讯作者:
Gyllensten U
影响因子:
13.6
作者:
Kühl I;Miranda M;Posse V;Milenkovic D;Mourier A;Siira SJ;Bonekamp NA;Neumann U;Filipovska A;Polosa PL;Gustafsson CM;Larsson NG
通讯作者:
Larsson NG
影响因子:
7.7
作者:
Kühl I;Miranda M;Atanassov I;Kuznetsova I;Hinze Y;Mourier A;Filipovska A;Larsson NG
通讯作者:
Larsson NG
影响因子:
5.6
作者:
BOGENHAGEN, D;CLAYTON, DA
通讯作者:
CLAYTON, DA
DOI:
10.1073/pnas.1512131112
发表时间:
2015-09-08
影响因子:
11.1
作者:
Kukat, Christian;Davies, Karen M.;Larsson, Nils-Goeran
通讯作者:
Larsson, Nils-Goeran