Brands 2011 Metabolism: Difference between revisions

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Brands M, Hoeks J, Sauerwein HP, Ackermans MT, Ouwens M, Lammers NM, van der Plas MN, Schrauwen P, Groen AK, Serlie MJ (2011) Short-term increase of plasma free fatty acids does not interfere with intrinsic mitochondrial function in healthy young men. Metabolism 60:1398-405.

» PMID: 21489571

Brands M, Hoeks J, Sauerwein HP, Ackermans MT, Ouwens M, Lammers NM, van der Plas MN, Schrauwen P, Groen AK, Serlie MJ (2011) Metabolism

Abstract: Free fatty acid (FFA)- and obesity-induced insulin resistance has been associated with disturbed mitochondrial function. Elevated plasma FFA can impair insulin-induced increase of adenosine triphosphate synthesis and downregulate the expression of genes important in the biogenesis of mitochondria in human skeletal muscle. Whether FFAs have a direct effect on intrinsic mitochondrial capacity remains to be established. Therefore, we measured ex vivo mitochondrial respiratory capacity in human skeletal muscle after exposure to hyperinsulinemia and high levels of plasma FFA. Nine healthy lean men were studied during a 6-hour hyperinsulinemic (600 pmol/L) euglycemic clamp with concomitant infusion of Intralipid (Fresensius Kabi Nederland, Den Bosch, the Netherlands) (FFA clamped at 0.5 mmol/L) or saline. Mitochondrial respiratory capacity was measured by high-resolution respirometry in permeabilized muscle fibers using an Oxygraph (Oroboros Instruments, Innsbruck, Austria). Each participant served as his own control. Peripheral glucose uptake (rate of disappearance) was significantly lower during infusion of the lipid emulsion compared with the control saline infusion (68 μmol/kg·min [saline] vs 40 μmol/kg·min [lipid], P = .008). However, adenosine diphosphate-stimulated and maximal carbonylcyanide-4-(trifluoromethoxy)-phenylhydrazone-stimulated uncoupled respiration rates were not different in permeabilized skeletal muscle fibers after exposure to high levels of FFA compared with the control condition. We conclude that short-term elevation of FFA within the physiological range induces insulin resistance but does not affect intrinsic mitochondrial capacity in skeletal muscle in humans. • Keywords: FFA

• O2k-Network Lab: NL Maastricht Schrauwen P, NL Amsterdam Serlie MJ

Labels:

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

Regulation: Fatty acid

HRR: Oxygraph-2k

MiR05, MitoEAGLE muscle buffer

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 {{Publication
-|title=Brands M, Hoeks J, Sauerwein HP, Ackermans MT, Ouwens M, Lammers NM, van der Plas MN, Schrauwen P, Groen AK, Serlie MJ (2011) Short-term increase of plasma free fatty acids.Metabolism [Epub ahead of print]
+|title=Brands M, Hoeks J, Sauerwein HP, Ackermans MT, Ouwens M, Lammers NM, van der Plas MN, Schrauwen P, Groen AK, Serlie MJ (2011) Short-term increase of plasma free fatty acids does not interfere with intrinsic mitochondrial function in healthy young men. Metabolism 60:1398-405.
-|info=[http://www.ncbi.nlm.nih.gov/pubmed/21489571 PMID:21489571]
+|info=[http://www.ncbi.nlm.nih.gov/pubmed/21489571 PMID: 21489571]
 |authors=Brands M, Hoeks J, Sauerwein HP, Ackermans MT, Ouwens M, Lammers NM, van der Plas MN, Schrauwen P, Groen AK, Serlie MJ
 |year=2011
 |journal=Metabolism
-|abstract=Free fatty acid (FFA)- and obesity-induced insulin resistance has been associated with disturbed mitochondrial function. Elevated plasma FFA can impair insulin-induced increase of adenosine triphosphate synthesis and downregulate the expression of genes important in the biogenesis of mitochondria in human skeletal muscle. Whether FAs have a direct effect on intrinsic mitochondrial capacity remains to be established. Therefore, we measured ex vivo mitochondrial respiratory capacity in human skeletal muscle after exposure to hyperinsulinemia and high levels of plasma FFA. Nine healthy lean men were studied during a 6-hour hyperinsulinemic (600 pmol/L) euglycemic clamp with concomitant infusion of Intralipid (Fresensius Kabi Nederland, Den Bosch, the Netherlands) (FFA clamped at 0.5 mmol/L) or saline. Mitochondrial respiratory capacity was measured by high-resolution respirometry in permeabilized muscle fibers using an Oxygraph (OROBOROS Instruments, Innsbruck, Austria). Each participant served as his own control. Peripheral glucose uptake (rate of disappearance) was significantly lower during infusion of the lipid emulsion compared with the control saline infusion (68 μmol/kg·min [saline] vs 40 μmol/kg·min [lipid], P = .008). However, adenosine diphosphate-stimulated and maximal carbonylcyanide-4-(trifluoromethoxy)-phenylhydrazone-stimulated uncoupled respiration rates were not different in permeabilized skeletal muscle fibers after exposure to high levels of FFA compared with the control condition. We conclude that short-term elevation of FFA within the physiological range induces insulin resistance but does not affect intrinsic mitochondrial capacity in skeletal muscle in humans.
+|abstract=Free fatty acid (FFA)- and obesity-induced insulin resistance has been associated with disturbed mitochondrial function. Elevated plasma FFA can impair insulin-induced increase of adenosine triphosphate synthesis and downregulate the expression of genes important in the biogenesis of mitochondria in human skeletal muscle. Whether FFAs have a direct effect on intrinsic mitochondrial capacity remains to be established. Therefore, we measured ex vivo mitochondrial respiratory capacity in human skeletal muscle after exposure to hyperinsulinemia and high levels of plasma FFA. Nine healthy lean men were studied during a 6-hour hyperinsulinemic (600 pmol/L) euglycemic clamp with concomitant infusion of Intralipid (Fresensius Kabi Nederland, Den Bosch, the Netherlands) (FFA clamped at 0.5 mmol/L) or saline. Mitochondrial respiratory capacity was measured by high-resolution respirometry in permeabilized muscle fibers using an Oxygraph (Oroboros Instruments, Innsbruck, Austria). Each participant served as his own control. Peripheral glucose uptake (rate of disappearance) was significantly lower during infusion of the lipid emulsion compared with the control saline infusion (68 μmol/kg·min [saline] vs 40 μmol/kg·min [lipid], ''P'' = .008). However, adenosine diphosphate-stimulated and maximal carbonylcyanide-4-(trifluoromethoxy)-phenylhydrazone-stimulated uncoupled respiration rates were not different in permeabilized skeletal muscle fibers after exposure to high levels of FFA compared with the control condition. We conclude that short-term elevation of FFA within the physiological range induces insulin resistance but does not affect intrinsic mitochondrial capacity in skeletal muscle in humans.
-|mipnetlab=NL_Maastricht_Schrauwen P NL_Amsterdam_Serlie MJ
+|keywords=FFA
+|mipnetlab=NL Maastricht Schrauwen P, NL Amsterdam Serlie MJ
 }}
 {{Labeling
+|organism=Human
+|tissues=Skeletal muscle
+|preparations=Permeabilized tissue
+|topics=Fatty acid
 |instruments=Oxygraph-2k
-|organism=Human
+|additional=MiR05, MitoEAGLE muscle buffer,
-|tissues=Skeletal Muscle
-|preparations=Permeabilized Cell or Tissue; Homogenate
 }}