Mitochondrial fusion is required for mtDNA stability in skeletal muscle and tolerance of mtDNA mutations.
Mitochondrial fusion is required for mtDNA stability in skeletal muscle and tolerance of mtDNA mutations.
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DOI:
10.1016/j.cell.2010.02.026
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发表时间:
2010-04-16
期刊:
影响因子:
64.5
通讯作者:
Chan DC
中科院分区:
文献类型:
--
作者:
Chen H;Vermulst M;Wang YE;Chomyn A;Prolla TA;McCaffery JM;Chan DC
Mitochondria are highly mobile and dynamic organelles that continually fuse and divide. These processes allow mitochondria to exchange contents, including mitochondrial DNA (mtDNA). Here we examine the functions of mitochondrial fusion in differentiated skeletal muscle through conditional deletion of the mitofusins Mfn1 and Mfn2, mitochondrial GTPases essential for fusion. Loss of the mitofusins causes severe mitochondrial dysfunction, compensatory mitochondrial proliferation, and muscle atrophy. Mutant mice have severe mtDNA depletion in muscle that precedes physiological abnormalities. Moreover, the mitochondrial genomes of the mutant muscle rapidly accumulate point mutations and deletions. In a related experiment, we find that disruption of mitochondrial fusion strongly increases mitochondrial dysfunction and lethality in a mouse model with high levels of mtDNA mutations. With its dual function in safeguarding mtDNA integrity and preserving mtDNA function in the face of mutations, mitochondrial fusion is likely to be a protective factor in human disorders associated with mtDNA mutations.
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影响因子:
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作者:
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通讯作者:
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影响因子:
21.3
作者:
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影响因子:
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作者:
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DOI:
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发表时间:
2007-01-01
期刊:
BIOGERONTOLOGY: MECHANISMS AND INTERVENTIONS
影响因子:
--
作者:
Krishnan, Kim J.;Greaves, Laura C.;Turnbull, Douglass M.
通讯作者:
Turnbull, Douglass M.
DOI:
10.1083/jcb.200211046
发表时间:
2003-01-20
期刊:
The Journal of cell biology
影响因子:
--
作者:
Chen H;Detmer SA;Ewald AJ;Griffin EE;Fraser SE;Chan DC
通讯作者:
Chan DC