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Raboel 2010 Diabetes Obes Metab

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Publications in the MiPMap
Raboel R, Boushel RC, Almdal T, Hansen CN, Ploug T, Haugaard SB, Prats C, Madsbad S, Dela F (2010) Opposite effects of pioglitazone and rosiglitazone on mitochondrial respiration in skeletal muscle of patients with type 2 diabetes. Diabetes Obes Metab 12:806-14.

» PMID: 20649633

Raboel R, Boushel RC, Almdal T, Hansen CN, Ploug T, Haugaard SB, Prats C, Madsbad S, Dela F (2010) Diabetes Obes Metab

Abstract: Aim: Skeletal muscle insulin resistance has been linked to mitochondrial dysfunction. We examined how improvements in muscular insulin sensitivity following rosiglitazone (ROSI) or pioglitazone (PIO) treatment would affect muscle mitochondrial function in patients with type 2 diabetes mellitus (T2DM).

Methods: Muscle biopsies were obtained from 21 patients with T2DM before and after 12 weeks on either ROSI (4 mg once daily) [n = 12; age, 59.2 +/- 2.2 years; body mass index (BMI), 29.6 +/- 0.7 kg/m(2)] or PIO (30 mg once daily) (n = 9; age, 56.3 +/- 2.4 years; BMI, 29.5 +/- 1.5 kg/m(2)). An age- and BMI-matched control group was also included (n = 8; age, 61.8 +/- 2.3 years; BMI, 28.4 +/- 0.6 kg/m(2)). Insulin sensitivity, citrate synthase- and beta-hydroxyacyl-CoA-dehydrogenase (HAD) activity, intramuscular triglyceride (IMTG) and protein content of complexes I-IV were measured, while mitochondrial respiration per milligram muscle was measured in saponin-treated skinned muscle fibres using high-resolution respirometry.

Results: Mitochondrial respiration per milligram muscle was lower in T2DM compared to controls at baseline and decreased during ROSI treatment but increased during PIO treatment. Citrate synthase activity and average protein content of complexes I-IV were unchanged in the ROSI group, but protein content of complexes II and III increased during PIO treatment. Insulin sensitivity improved in all patients, but IMTG levels were unchanged.

Conclusions: We show opposite effects of ROSI and PIO on mitochondrial respiration, and also show that insulin sensitivity can be improved independently of changes in mitochondrial respiration. We confirm that mitochondrial respiration is reduced in T2DM compared to age- and BMI-matched control subjects. Keywords: Mitochondrial respiration, Pioglitazone, Rosiglitazone, Skeletal muscle, Type 2 diabetes

O2k-Network Lab: CA Vancouver Boushel RC, DK Copenhagen Dela F, DK Copenhagen Larsen S

MitoEAGLE VO2max/BME database

  • Human vastus lateralis
  • 5 females & 6 males
  • age
  • Obese
  • H = 1.76 m
  • M = 95.2 kg
  • BME = 0.48
  • BMI = 30.6 kg·m-2
  • VO2max/M = 24.1 mL·min-1·kg-1
  • Permeabilized muscle fibres; 37 °C; GMSP; mw; conversions: Gnaiger 2009 Int J Biochem Cell Biol
  • JO2,P(NS) = 61.4 µmol·s-1·kg-1 wet muscle mass (37 °C)

  • Human vastus lateralis
  • 5 females & 6 males
  • age
  • T2DM
  • H = 1.82 m
  • M = 99.7 kg
  • BME = 0.43
  • BMI = 30.2 kg·m-2
  • VO2max/M = 20.8 mL·min-1·kg-1
  • Permeabilized muscle fibres; 37 °C; GMSP; mw; conversions: Gnaiger 2009 Int J Biochem Cell Biol
  • JO2,P(NS) = 50.7 µmol·s-1·kg-1 wet muscle mass (37 °C)

References: BME and VO2max

» VO2max
 Reference
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Boushel 2007 DiabetologiaBoushel RC, Gnaiger E, Schjerling P, Skovbro M, Kraunsoee R, Dela F (2007) Patients with Type 2 diabetes have normal mitochondrial function in skeletal muscle. Diabetologia 50:790-6.
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Labels: Pathology: Diabetes  Stress:Mitochondrial disease  Organism: Human  Tissue;cell: Skeletal muscle  Preparation: Permeabilized tissue 



HRR: Oxygraph-2k 

VO2max, BMI, BME, MitoEAGLE BME