Takahashi 2014 Exp Gerontol
| Takahashi K, Noda Y, Ohsawa I, Shirasawa T, Takahashi M (2014) Extended lifespan, reduced body size and leg skeletal muscle mass, and decreased mitochondrial function in clk-1 transgenic mice. Exp Gerontol [Epub ahead of print]. |
Takahashi K, Noda Y, Ohsawa I, Shirasawa T, Takahashi M (2014) Exp Gerontol
Abstract: Mutational inactivation of clk-1, which encodes an enzyme necessary for the biosynthesis of coenzyme Q (CoQ), extends the lifespan of Caenorhabditis elegans. However, whether mammalian clk-1 regulates the lifespan of mice is not known because clk-1-deficiencies are embryonic lethal. Here, we investigated the lifespan of clk-1 transgenic mice (Tg96/I), which were rescued from embryonic lethality via the transgenic expression of mouse clk-1. Tg96/I mice lived longer and had smaller bodies than wild-type mice, but Tg96/I mice had CoQ levels equivalent to wild-type mice. The small-sized Tg96/I mice exhibited reduced whole-body oxygen consumption (VO2) during the dark period, and lean leg skeletal muscles with reduced mitochondrial VO2 and ATP content compared with wild-type mice. These findings indicate a close relationship between lifespan extension and decreased mitochondrial function, which was induced by the transgenic expression of clk-1, in leg skeletal muscles that exhibit high metabolic activity. • Keywords: Lifespan, Mitochondrial function, clk-1, Coenzyme Q, Oxygen consumption, Leg skeletal muscles
• O2k-Network Lab: JP Tokyo Tanaka M
Labels: MiParea: Respiration, Genetic knockout;overexpression, Gender
Pathology: Aging; senescence"Aging; senescence" is not in the list (Aging;senescence, Alzheimer's, Autism, Cancer, Cardiovascular, COPD, Diabetes, Inherited, Infectious, Myopathy, ...) of allowed values for the "Diseases" property.
Organism: Mouse Tissue;cell: Skeletal muscle, Liver Preparation: Isolated Mitochondria"Isolated Mitochondria" is not in the list (Intact organism, Intact organ, Permeabilized cells, Permeabilized tissue, Homogenate, Isolated mitochondria, SMP, Chloroplasts, Enzyme, Oxidase;biochemical oxidation, ...) of allowed values for the "Preparation" property.
Coupling state: LEAK, OXPHOS
HRR: Oxygraph-2k
