Mitochondrial electron transport chain functions in long-lived Ames dwarf mice
Published Date:Aug 2011
Source:Aging (Albany NY). 2011; 3(8):754-767.
Ames Dwarf Mice
Electron Transport Chain Activity
Electron Transport Chain Complex Proteins
Gene Expression Regulation
Mice, Inbred Strains
Pubmed Central ID:PMC3184977
Funding:1 P30 AG024832-03/AG/NIA NIH HHS/United States
1P01 AG021830/AG/NIA NIH HHS/United States
P30 AG024832/AG/NIA NIH HHS/United States
T32-EH07254/EH/NCEH CDC HHS/United States
Description:The age-associated decline in tissue function has been attributed to ROS-mediated oxidative damage due to mitochondrial dysfunction. The long-lived Ames dwarf mouse exhibits resistance to oxidative stress, a physiological characteristic of longevity. It is not known, however, whether there are differences in the electron transport chain (ETC) functions in Ames tissues that are associated with their longevity. In these studies we analyzed enzyme activities of ETC complexes, CI-CV and the coupled CI-CII and CII-CIII activities of mitochondria from several tissues of young, middle aged and old Ames dwarf mice and their corresponding wild type controls to identify potential mitochondrial prolongevity functions. Our studies indicate that post-mitotic heart and skeletal muscle from Ames and wild-type mice show similar changes in ETC complex activities with aging, with the exception of complex IV. Furthermore, the kidney, a slowly proliferating tissue, shows dramatic differences in ETC functions unique to the Ames mice. Our data show that there are tissue specific mitochondrial functions that are characteristic of certain tissues of the long-lived Ames mouse. We propose that this may be a factor in the determination of extended lifespan of dwarf mice.
image/gif image/jpeg image/gif image/jpeg image/gif image/jpeg image/gif image/jpeg image/gif image/jpeg image/gif image/jpeg image/gif image/jpeg image/gif image/jpeg text/plain text/plain
You May Also Like: