Enhanced fatty acid oxidation and FATP4 protein expression after endurance exercise training in human skeletal muscle
FATP1 and FATP4 appear to be important for the cellular uptake and handling of long chain fatty acids (LCFA). These findings were obtained from loss- or gain of function models. However, reports on FATP1 and FATP4 in human skeletal muscle are limited. Aerobic training enhances lipid oxidation; howev...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
January 3, 2012
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| In: |
PLOS ONE
Year: 2012, Volume: 7, Issue: 1 |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0029391 |
| Online Access: | Verlag, kostenfrei, Volltext: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0029391 Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1371/journal.pone.0029391 
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| Author Notes: | Jacob Jeppesen, Andreas B. Jordy, Kim A. Sjøberg, Joachim Füllekrug, Andreas Stahl, Lars Nybo, Bente Kiens |
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| 245 | 1 | 0 | |a Enhanced fatty acid oxidation and FATP4 protein expression after endurance exercise training in human skeletal muscle |c Jacob Jeppesen, Andreas B. Jordy, Kim A. Sjøberg, Joachim Füllekrug, Andreas Stahl, Lars Nybo, Bente Kiens |
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| 520 | |a FATP1 and FATP4 appear to be important for the cellular uptake and handling of long chain fatty acids (LCFA). These findings were obtained from loss- or gain of function models. However, reports on FATP1 and FATP4 in human skeletal muscle are limited. Aerobic training enhances lipid oxidation; however, it is not known whether this involves up-regulation of FATP1 and FATP4 protein. Therefore, the aim of this project was to investigate FATP1 and FATP4 protein expression in the vastus lateralis muscle from healthy human individuals and to what extent FATP1 and FATP4 protein expression were affected by an increased fuel demand induced by exercise training. Eight young healthy males were recruited to the study. All subjects were non smokers and did not participate in regular physical activity (<1 time per week for the past 6 months, VO2peak 3.4±0.1 l O2 min−1). Subjects underwent an 8 week supervised aerobic training program. Training induced an increase in VO2peak from 3.4±0.1 to 3.9±0.1 l min−1 and citrate synthase activity was increased from 53.7±2.5 to 80.8±3.7 µmol g−1 min−1. The protein content of FATP4 was increased by 33%, whereas FATP1 protein content was reduced by 20%. Interestingly, at the end of the training intervention a significant association (r2 = 0.74) between the observed increase in skeletal muscle FATP4 protein expression and lipid oxidation during a 120 min endurance exercise test was observed. In conclusion, based on the present findings it is suggested that FATP1 and FATP4 proteins perform different functional roles in handling LCFA in skeletal muscle with FATP4 apparently more important as a lipid transport protein directing lipids for lipid oxidation. | ||
| 650 | 4 | |a Exercise | |
| 650 | 4 | |a Integral membrane proteins | |
| 650 | 4 | |a Lipids | |
| 650 | 4 | |a Membrane proteins | |
| 650 | 4 | |a Muscle proteins | |
| 650 | 4 | |a Oxidation | |
| 650 | 4 | |a Protein expression | |
| 650 | 4 | |a Skeletal muscles | |
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