Jacobs 2013 J Gerontol A Biol Sci Med Sci
| Jacobs RA, Diaz V, Soldini L, Haider T, Thomassen M, Nordsborg NB, Gassmann M, Lundby C (2013) Fast-twitch glycolytic skeletal muscle is predisposed to age-induced impairments in mitochondrial function. J Gerontol A Biol Sci Med Sci [Epub ahead of print]. |
Jacobs RA, Diaz V, Soldini L, Haider T, Thomassen M, Nordsborg NB, Gassmann M, Lundby C (2013) J Gerontol A Biol Sci Med Sci
Abstract: The etiology of mammalian senescence is suggested to involve the progressive impairment of mitochondrial function; however, direct observations of age-induced alterations in actual respiratory chain function are lacking. Accordingly, we assessed mitochondrial function via high-resolution respirometry and mitochondrial protein expression in soleus, quadricep, and lateral gastrocnemius skeletal muscles, which represent type 1 slow-twitch oxidative muscle (soleus) and type 2 fast-twitch glycolytic muscle (quadricep and gastrocnemius), respectively, in young (10-12 weeks) and mature (74-76 weeks) mice. Electron transport through mitochondrial complexes I and III increases with age in quadricep and gastrocnemius, which is not observed in soleus. Mitochondrial coupling efficiency during respiration through complex I also deteriorates with age in gastrocnemius and shows a tendency (p = .085) to worsen in quadricep. These data demonstrate actual alterations in electron transport function that occurs with age and are dependent on skeletal muscle type. • Keywords: Senescence, slow-twitch oxidative muscle, type 2 fast-twitch glycolytic muscle
• O2k-Network Lab: CH Zurich Lundby C
Labels:
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
Enzyme: Complex I, Complex III
HRR: Oxygraph-2k
Epub ahead of print
