Linked Life Data

17532093

Source:http://linkedlifedata.com/resource/pubmed/id/17532093

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2007-6-4
pubmed:abstractText
Mitochondria change their shapes dynamically mainly through fission and fusion. Dynamin-related GTPases have been shown to mediate remodeling of mitochondrial membranes during these processes. One of these GTPases, mitofusin, is anchored at the outer mitochondrial membrane and mediates fusion of the outer membrane. We found that overexpression of a mitofusin isoform, Mfn2, drastically changes mitochondrial morphology, forming mitochondrial clusters. High-resolution microscopic examination indicated that the mitochondrial clusters consisted of small fragmented mitochondria. Inhibiting mitochondrial fission prevented the cluster formation, supporting the notion that mitochondrial clusters are formed by fission-mediated mitochondrial fragmentation and aggregation. Mitochondrial clusters displayed a decreased inner membrane potential and mitochondrial function, suggesting a functional compromise of small fragmented mitochondria produced by Mfn2 overexpression; however, mitochondrial clusters still retained mitochondrial DNA. We found that cells containing clustered mitochondria lost cytochrome c from mitochondria and underwent caspase-mediated apoptosis. These results demonstrate that mitochondrial deformation impairs mitochondrial function, leading to apoptotic cell death and suggest the presence of an intricate form-function relationship in mitochondria.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0171-9335
pubmed:author
pubmed:issnType
Print
pubmed:volume
86
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
289-302
pubmed:dateRevised
2007-12-3
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Mitochondrial clustering induced by overexpression of the mitochondrial fusion protein Mfn2 causes mitochondrial dysfunction and cell death.
pubmed:affiliation
Department of Pharmacology and Physiology, University of Rochester, School of Medicine and Dentistry, 601 Elmwood Avenue, P.O. Box 604, Rochester, NY 14642, USA.
pubmed:publicationType
Journal Article, Research Support, N.I.H., Extramural