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Williams 2014 PLoS One

From Bioblast
Publications in the MiPMap
Williams CB, Hughes MC, Edgett BA, Scribbans TD, Simpson CA, Perry CG, Gurd BJ (2014) An examination of resveratrol's mechanisms of action in human tissue: impact of a single dose in vivo and dose responses in skeletal muscle ex vivo. PLoS One 9:e102406.

ยป PMID: 25019209

Williams CB, Hughes MC, Edgett BA, Scribbans TD, Simpson CA, Perry CG, Gurd BJ (2014) PLoS One

Abstract: The current study tested the hypothesis that a single, moderate dose of RSV would activate the AMPK/SIRT1 axis in human skeletal muscle and adipose tissue. Additionally, the effects of RSV on mitochondrial respiration in PmFBs were examined. Eight sedentary men (23.8ยฑ2.4 yrs; BMI: 32.7ยฑ7.1) reported to the lab on two occasions where they were provided a meal supplemented with 300 mg of RSV or a placebo. Blood samples, and a muscle biopsy were obtained in the fasted state and again, with the addition of an adipose tissue biopsy, two hours post-prandial. The effect of RSV on mitochondrial respiration was examined in PmFBs taken from muscle biopsies from an additional eight men (23.4ยฑ5.4 yrs; BMI: 24.4ยฑ2.8). No effect of RSV was observed on nuclear SIRT1 activity, acetylation of p53, or phosphorylation of AMPK, ACC or PKA in either skeletal muscle or adipose tissue. A decrease in post absorptive insulin levels was accompanied by elevated skeletal muscle phosphorylation of p38 MAPK, but no change in either skeletal muscle or adipose tissue insulin signalling. Mitochondrial respiration in PmFBs was rapidly inhibited by RSV at 100-300 uM depending on the substrate examined. These results question the efficacy of a single dose of RSV at altering skeletal muscle and adipose tissue AMPK/SIRT1 activity in humans and suggest that RSV mechanisms of action in humans may be associated with altered cellular energetics resulting from impaired mitochondrial ATP production.

โ€ข O2k-Network Lab: CA Toronto Perry CG

Labels: MiParea: Respiration, Pharmacology;toxicology 

Organism: Human  Tissue;cell: Skeletal muscle  Preparation: Permeabilized tissue 

Coupling state: OXPHOS  Pathway: F, N, S, NS  HRR: Oxygraph-2k