McKenzie, Alec I.; Mahmassani, Ziad S.; Petrocelli, Jonathan J.; de Hart, Naomi M. M. P.; Fix, Dennis K.; Ferrara, Patrick J.; LaStayo, Paul C.; Marcus, Robin L.; Rondina, Matthew T.; Summers, Scott A.; Johnson, Jordan M.; Trinity, Joel D.; Funai, Katsuhiko; Drummond, Micah J. published the artcile< Short-term exposure to a clinical dose of metformin increases skeletal muscle mitochondrial H2O2 emission and production in healthy, older adults: A randomized controlled trial>, Category: esters-buliding-blocks, the main research area is skeletal muscle mitochondrial H2O2 metformin clin dose healthy adult; Aging; Complex I respiration; Free radicals; Insulin sensitizers; Metabolism; Mitochondria; Muscle stem cells.
Metformin is the most commonly prescribed medication to treat diabetes. Emerging evidence suggests that metformin could have off target effects that might help promote healthy muscle aging, but these effects have not been thoroughly studied in glucose tolerant older individuals. The purpose of this study was to investigate the short-term effects of metformin consumption on skeletal muscle mitochondrial bioenergetics in healthy older adults. We obtained muscle biopsy samples from 16 healthy older adults previously naive to metformin and treated with metformin (METF; 3F, 5M), or placebo (CON; 3F, 5M), for two weeks using a randomized and blinded study design. Samples were analyzed using high-resolution respirometry, immunofluorescence, and immunoblotting to assess muscle mitochondrial bioenergetics, satellite cell (SC) content, and associated protein markers. We found that metformin treatment did not alter maximal mitochondrial respiration rates in muscle compared to CON. In contrast, mitochondrial H2O2 emission and production were elevated in muscle samples from METF vs. CON (METF emission: 2.59 ± 0.72 SE Fold, P = 0.04; METF production: 2.29 ± 0.53 SE Fold, P = 0.02). Furthermore, the change in H2O2 emission was pos. correlated with the change in type 1 myofiber SC content and this was biased in METF participants (Pooled: R2 = 0.5816, P = 0.0006; METF: R2 = 0.674, P = 0.0125). These findings suggest that acute exposure to metformin does not impact mitochondrial respiration in aged, glucose-tolerant muscle, but rather, influences mitochondrial-free radical and SC dynamics.Clin. trial registration. NCT03107884, clinicaltrials.gov.
Experimental Gerontology published new progress about Adult, mammalian. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.
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