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Selective activation of AMPK‐PGC‐1α or PKB‐TSC2‐mTOR signaling can explain specific adaptive responses to endurance or resistance training‐like electrical muscle stimulation
Abstract
Endurance training induces a partial fast-to-slow muscle phenotype transformation and mitochondrial biogenesis but no growth. In contrast, resistance training mainly stimulates muscle protein synthesis resulting in hypertrophy. The aim of this study was to identify signaling events that may mediate the specific adaptations to these types of exercise. Isolated rat muscles were electrically stimulated with either high frequency (HFS; 6x10 repetitions of 3 s-bursts at 100 Hz to mimic resistance training) or low frequency (LFS; 3 h at 10 Hz to mimic endurance training). HFS significantly increased myofibrillar and sarcoplasmic protein synthesis 3 h after stimulation 5.3- and 2.7-fold, respectively. LFS had no significant effect on protein synthesis 3 h after stimulation but increased UCP3 mRNA 11.7-fold, whereas HFS had no significant effect on UCP3 mRNA. Only LFS increased AMPK phosphorylation significantly at Thr172 by approximately 2-fold and increased PGC-1alpha protein to 1.3 times of control. LFS had no effect on PKB phosphorylation but reduced TSC2 phosphorylation at Thr1462 and deactivated translational regulators. In contrast, HFS acutely increased phosphorylation of PKB at Ser473 5.3-fold and the phosphorylation of TSC2, mTOR, GSK-3beta at PKB-sensitive sites. HFS also caused a prolonged activation of the translational regulators p70 S6k, 4E-BP1, eIF-2B, and eEF2. These data suggest that a specific signaling response to LFS is a specific activation of the AMPK-PGC-1alpha signaling pathway which may explain some endurance training adaptations. HFS selectively activates the PKB-TSC2-mTOR cascade causing a prolonged activation of translational regulators, which is consistent with increased protein synthesis and muscle growth. We term this behavior the "AMPK-PKB switch." We hypothesize that the AMPK-PKB switch is a mechanism that partially mediates specific adaptations to endurance and resistance training, respectively.
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“endurance exercise studies with rodents and humans have shown AMPK signaling and mRNAs involved in mitochondrial biogenesis increase hours following exercise (Fujii et al., 2000; Atherton et al., 2005; Jorgensen et al., 2005)”
From Skeletal Muscle Ribosome and Mitochondrial Biogenesis in Response to Different Exercise Training Modalities (2021) · cites this paper as Atherton et al., 2005
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InfluentialEarly signaling responses to divergent exercise stimuli in skeletal muscle from well-trained humans
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Effects of strength training on endurance capacity in top‐level endurance athletes
Aagaard, P., & Andersen, J. L. (2010) · Scandinavian Journal of Medicine and Science in Sports · doi:10.1111/j.1600-0838.2010.01197.x · Cited by 185
“Recent studies have shown that distinct cell signaling events involving the Akt/ mTOR or AMPK pathways appear to become activated by resistance or endurance training, respectively (Atherton et al., 2005), and that inhibitory cross-talk exists from one pathway to the other (Nader 2006; Baar 2006).”
BackgroundExercise-Stimulated ROS Sensitive Signaling Pathways in Skeletal Muscle
Bouvière, J., Fortunato, R. S., Dupuy, C., Werneck‐de‐Castro, J. P., de Carvalho, D. P., & Louzada, R. A. N. (2021) · Antioxidants · doi:10.3390/antiox10040537 · Cited by 184
“The molecular machinery involved in physical exercise adaptations are closely related to the exercise type [1,84].”
BackgroundmTOR Signaling and the Molecular Adaptation to Resistance Exercise
BODINE, S. C. (2006) · Medicine & Science in Sports & Exercise · doi:10.1249/01.mss.0000233797.24035.35 · Cited by 171
“GSK3 is detected in isolated rat muscles immediately after high-frequency stimulation (4).”
BackgroundMechanotransduction and the regulation of mTORC1 signaling in skeletal muscle
Hornberger, T. A. (2011) · The International Journal of Biochemistry & Cell Biology · doi:10.1016/j.biocel.2011.05.007 · Cited by 170
“…al., 2001), ii) mechanical stimulation activates signaling through PI3K and PKB (Bolster et al., 2003, Hornberger et al., 2003, Sakamoto et al., 2003, Atherton et al., 2005, Deshmukh et al., 2006, Haddad and Adams, 2006, Bodine et al., 2001, Carlson et al., 2001, Spangenburg and McBride, 2006,…”
BackgroundAerobic exercise does not compromise muscle hypertrophy response to short-term resistance training
Lundberg, T. R., Fernandez-Gonzalo, R., Gustafsson, T., & Tesch, P. A. (2013) · Journal of Applied Physiology · doi:10.1152/japplphysiol.01013.2012 · Cited by 168
“Because acute AE and RE appear to activate different cellular pathways (4), it was proposed that these signaling routes, assumed to operate in a selective switch manner, would govern mitochondrial biogenesis and myofibrillar protein synthesis, respectively.”
BackgroundCuthbertson, D. J., Babraj, J., Smith, K., Wilkes, E., Fedele, M. J., Esser, K., & Rennie, M. (2006) · American Journal of Physiology-Endocrinology and Metabolism · doi:10.1152/ajpendo.00415.2005 · Cited by 166
“Consistent with this, we recently showed that a pattern of muscle stimulation likely to mimic dynamic long-term exercise was associated with an inhibition of the PKB phosphorylation of TSC2, an upstream regulator of mTOR, probably as a result of activation of AMPK (1).”
BackgroundEliasson, J., Brink-Elfegoun, T., Nilsson, J. E., Köhnke, R., Ekblom, B. T., & Blomstrand, E. (2006) · American Journal of Physiology-Endocrinology and Metabolism · doi:10.1152/ajpendo.00141.2006 · Cited by 163
“In two recent studies, resistance exercise in rats or high-frequency stimulation of rat muscle in vitro was also reported to activate this pathway, supporting the view that the Akt/mTOR/p70 pathway is involved in contraction-induced muscle growth (2, 6).”
BackgroundResultFunctional and Muscular Effects of Neuromuscular Electrical Stimulation in Patients With Severe COPD
Vivodtzev, I., Debigaré, R., Gagnon, P., Mainguy, V., Saey, D., Dubé, A., Paré, M., Bélanger, M., & Maltais, F. (2011) · CHEST Journal · doi:10.1378/chest.11-0839 · Cited by 167
Baillet, A. C., Vaillant, M., Guinot, M., Juvin, R., & Gaudin, P. (2011) · Lara D. Veeken · doi:10.1093/rheumatology/ker330 · Cited by 163
Physical Exercise in the Oldest Old
Valenzuela, P. L., Castillo‐García, A., Morales, J. S., Izquierdo, M., Serra‐Rexach, J. A., Santos‐Lozano, A., & Lucia, A. (2019) · Comprehensive Physiology · doi:10.1002/cphy.c190002 · Cited by 152
“Vibration Vibration [i.e., application of a mechanical oscillation to the whole body (using a vibration platform) or some parts of it (using smaller vibrating devices)] has been proposed as a training modality with potential benefits in different clinical (4, 87), which would make it useful during…”
Murach, K. A., & Bagley, J. R. (2016) · Sports Medicine · doi:10.1007/s40279-016-0496-y · Cited by 158
Aagaard, P., Andersen, J. L., Bennekou, M., Larsson, B., Olesen, J. L., Crameri, R. M., Magnusson, S. P., & Kjær, M. (2011) · Scandinavian Journal of Medicine and Science in Sports · doi:10.1111/j.1600-0838.2010.01283.x · Cited by 174
“Recent studies have shown that resistance or endurance training activate distinct cell signaling involving the Akt/mTOR or AMPK pathways, respectively (Atherton et al., 2005), and that inhibitory cross-talk exist from one pathway to the other (Baar, 2006; Nader, 2006).”
BackgroundEarly Time Course of Akt Phosphorylation after Endurance and Resistance Exercise
CAMERA, D. M., EDGE, J., SHORT, M. J., HAWLEY, J. A., & COFFEY, V. G. (2010) · Medicine & Science in Sports & Exercise · doi:10.1249/mss.0b013e3181d964e4 · Cited by 154
Thomson, D. M., Fick, C. A., & Gordon, S. E. (2008) · Journal of Applied Physiology · doi:10.1152/japplphysiol.00915.2007 · Cited by 153
Cellular and molecular events controlling skeletal muscle mass in response to altered use
Favier, F. B., Benoit, H., & Freyssenet, D. G. (2008) · Pflügers Archiv - European Journal of Physiology · doi:10.1007/s00424-007-0423-z · Cited by 156
“Similar phosphorylation patterns have been evidenced in response to functional overload [22, 125], high frequency electrical stimulation (HFES) [ 11 ] or passive stretch [72, 132].”
BackgroundInfluentialSchumann, M., Feuerbacher, J. F., Sünkeler, M., Freitag, N., Rønnestad, B. R., Doma, K., & Lundberg, T. R. (2022) · Sports Medicine · doi:10.1007/s40279-021-01587-7 · Cited by 156
Koopman, R., Zorenc, A. H. G., Gransier, R. J. J., Cameron-Smith, D., & van Loon, L. J. C. (2006) · American Journal of Physiology-Endocrinology and Metabolism · doi:10.1152/ajpendo.00530.2005 · Cited by 196
“In contrast to these and our observations, there are some studies in rodents that have reported an increase in S6K1 activity in response to either isometric or eccentric contractions (2, 3, 16, 25).”
ResultAutophagy is essential to support skeletal muscle plasticity in response to endurance exercise
Sanchez, A. M. J., Bernardi, H., Py, G., & Candau, R. B. (2014) · American Journal of Physiology-Regulatory, Integrative and Comparative Physiology · doi:10.1152/ajpregu.00187.2014 · Cited by 125
“Although a single bout of high-frequency electrical stimulation or sprint exercise induces a transient increase in Akt (Thr-308/Ser-473) and MTOR (Ser-2448) phosphorylation during the recovery period (32, 102), no change is usually observed after endurance exercise for Akt, whatever the intensity or species (mice/rats…”
Kemps, H., Kränkel, N., Dörr, M., Moholdt, T. T., Wilhelm, M., Paneni, F., Serratosa, L., Solberg, E. E., Hansen, D., Halle, M., et al. (2019) · European Journal of Preventive Cardiology · doi:10.1177/2047487318820420 · Cited by 154
Gibala, M. (2009) · Applied Physiology, Nutrition, and Metabolism · doi:10.1139/h09-046 · Cited by 139
“In light of these findings, Atherton et al. (2005) proposed the ‘‘AMPK-PKB switch’’ hypothesis as a mechanism that partially mediates specific adaptations to endurance and resistance training.”
BackgroundGoodman, C. A. (2013) · Reviews of physiology, biochemistry and pharmacology · doi:10.1007/112_2013_17 · Cited by 145
“While this study suggests a dissociation between post-stimulation protein synthesis and mTORC1 signaling, the reduced mTORC1 signaling may, in part, be due to the absence of amino acids in the incubating medium (Atherton et al. 2005).”
BackgroundDefining meal requirements for protein to optimize metabolic roles of amino acids
Layman, D. K., Anthony, T. G., Rasmussen, B. B., Adams, S. H., Lynch, C. J., Brinkworth, G. D., & Davis, T. A. (2015) · American Journal of Clinical Nutrition · doi:10.3945/ajcn.114.084053 · Cited by 147
“and the 4E binding protein 1 (4EBP1) (66, 69, 70).”
Holm, L., van Hall, G., Rose, A. J., Miller, B. F., Doessing, S., Richter, E. A., & Kjaer, M. (2010) · American Journal of Physiology-Endocrinology and Metabolism · doi:10.1152/ajpendo.00609.2009 · Cited by 132
Andersen, J. L., & Aagaard, P. (2010) · Scandinavian Journal of Medicine and Science in Sports · doi:10.1111/j.1600-0838.2010.01196.x · Cited by 133
“Even though hypertrophy only is manifested, or more rightly so; measurable, after 4–6 weeks of intensive resistance training from the untrained state (Seynnes et al., 2007), the processes leading to hypertrophy commence already within the first exercise session (Atherton et al., 2005).”
BackgroundRole of AMP-activated protein kinase in healthy and diseased hearts
Dolinsky, V. W., & Dyck, J. R. B. (2006) · American Journal of Physiology-Heart and Circulatory Physiology · doi:10.1152/ajpheart.00329.2006 · Cited by 134
“Although the role of AMPK activation during ischemia has not been clearly defined, AMPK activation may be beneficial in ischemia due to increased GLUT4 translocation to the plasma membrane (5) and the potential inhibition of glycogen synthesis (6), which increases glucose supply for ATP production via glycolysis (7).”
BackgroundMechanical stimuli of skeletal muscle: implications on mTOR/p70s6k and protein synthesis
Zanchi, N. E., & Lancha, A. H. (2007) · European Journal of Applied Physiology · doi:10.1007/s00421-007-0588-3 · Cited by 131
“The activation of p70s6k (phosphorylation in Threonine 389) was reported to occur only in response to high force contractions in rodents (Nader and Esser 2001; Haddad and Addams 2002; Atherton et al. 2005) as well as in human subjects (Dreyer et al.”
BackgroundMethodInfluentialKelly, N. A., Ford, M. P., Standaert, D. G., Watts, R. L., Bickel, C. S., Moellering, D. R., Tuggle, S. C., Williams, J. Y., Lieb, L., Windham, S. T., et al. (2014) · Journal of Applied Physiology · doi:10.1152/japplphysiol.01277.2013 · Cited by 128
“However, because divergent cell signaling mechanisms 87 (5, 17) and transcriptional programs (64) are thought to drive RT-induced myofiber hypertrophy vs.”
BackgroundAshabi, G., Khodagholi, F., Khalaj, L., Goudarzvand, M., & Nasiri, M. (2014) · Metabolic Brain Disease · doi:10.1007/s11011-013-9475-2 · Cited by 122
Differences in electrical stimulation thresholds between men and women
Maffiuletti, N. A., Herrero, A. J., Jubeau, M., Impellizzeri, F. M., & Bizzini, M. (2008) · Annals of Neurology · doi:10.1002/ana.21346 · Cited by 116
“Frequencies of 10 and 75Hz were considered representative of low-frequency (LF) ES,(12) which is generally used to mimic endurance exercise,(13) and highfrequency (HF) ES,(14) which is generally adopted to mimic resistance exercise.(13) Following electrode positioning and instructions, current amplitude (in mA) was pr…”
BackgroundConsecutive bouts of diverse contractile activity alter acute responses in human skeletal muscle
Coffey, V. G., Pilegaard, H., Garnham, A. P., O'Brien, B. J., & Hawley, J. A. (2009) · Journal of Applied Physiology · doi:10.1152/japplphysiol.91221.2008 · Cited by 116
“Moreover, the increases in isoform-specific Akt1 phosphorylation with resistance but not endurance exercise is indicative of the capacity for highintensity, low-volume contraction to promote an anabolic response in skeletal muscle (3, 9) (Fig.”
BackgroundInfluentialA Novel Bioreactor for Stimulating Skeletal Muscle In Vitro
Donnelly, K., Khodabukus, A., Philp, A., Deldicque, L., Dennis, R. G., & Baar, K. (2009) · Tissue Engineering Part C Methods · doi:10.1089/ten.tec.2009.0125 · Cited by 114
Blazev, R., Carl, C. S., Ng, Y., Molendijk, J., Voldstedlund, C. T., Zhao, Y., Xiao, D., Kueh, A. J., Miotto, P. M., Haynes, V. R., et al. (2022) · Cell Metabolism · doi:10.1016/j.cmet.2022.07.003 · Cited by 113
Molecular Mechanisms of Muscle Plasticity with Exercise
Hoppeler, H. H., Baum, O., Lurman, G. J., & Mueller, M. (2011) · Comprehensive physiology · doi:10.1002/cphy.c100042 · Cited by 131
Vissing, K., McGee, S. L., Farup, J., Kjølhede, T., Vendelbo, M. H., & Jessen, N. (2013) · Scandinavian Journal of Medicine & Science in Sports · doi:10.1111/j.1600-0838.2011.01395.x · Cited by 111
“In rats, AMPK vs Akt-mTOR signaling divergence has been suggested to explain conversion of EE stimulation into mitochondrial biogenesis and conversion of SE stimulation into muscle hypertrophy, respectively (Atherton et al., 2005).”
BackgroundInfluentialApró, W., Wang, L., Pontén, M., Blomstrand, E., & Sahlin, K. (2013) · American Journal of Physiology-Endocrinology and Metabolism · doi:10.1152/ajpendo.00091.2013 · Cited by 109
Nuntaphum, W., Pongkan, W., Wongjaikam, S., Thummasorn, S., Tanajak, P., Khamseekaew, J., Intachai, K., Chattipakorn, S. C., Chattipakorn, N., & Shinlapawittayatorn, K. (2018) · Basic Research in Cardiology · doi:10.1007/s00395-018-0683-0 · Cited by 110
A Brief Review on Concurrent Training: From Laboratory to the Field
Methenitis, S. K. (2018) · Sports · doi:10.3390/sports6040127 · Cited by 119
Mascher, H., Andersson, H., Nilsson, P.-A., Ekblom, B. T., & Blomstrand, E. (2007) · Acta Physiologica · doi:10.1111/j.1748-1716.2007.01712.x · Cited by 109
“Furthermore, resistance exercise in rats, as well as high-frequency stimulation of skeletal muscle in vitro, has also been reported to increase Akt and mTOR phosphorylation (Bolster et al. 2003, Atherton et al. 2005).”
BackgroundInfluential
Metadata
- Authors
- Atherton, P. J., Babraj, J. A., Smith, K., Singh, J., Rennie, M. J., & Wackerhage, H.
- Affiliations
- University of Nottingham (GB)
- University of Dundee (GB)
- University of Lancashire (GB)
- ORCID
- Venue
- The FASEB Journal
- Publisher
- Wiley
- Published
- 2005-02-16
- Volume
- 19
- Issue
- 7
- Pages
- 1-23
- ISSN
- 0892-6638 (ISSN-L)
- 1530-6860
- OpenAlex
- W2115928938
- Cited by
- 475
- References
- 62
- Citations by year
- 2026: 9 · 2025: 11 · 2024: 10 · 2023: 21 · 2022: 15 · 2021: 15 · 2020: 18 · 2019: 25 · 2018: 35 · 2017: 16 · 2016: 22 · 2015: 20 · 2014: 30 · 2013: 33 · 2012: 23
- FWCI
- 12.47
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The FASEB Journal (publishedVersion)
- PubMed (publishedVersion)
- CLOK (University of Central Lancashire) (submittedVersion)
- Funders
- National Institutes of Health (AR 49869)
- Biotechnology and Biological Sciences Research Council
- Diabetes UK
- Tenovus
- University of Central Lancashire
- University of Dundee
- Topics
- Health Sciences › Nursing › Nutrition and Dietetics › Muscle metabolism and nutrition
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
- Keywords
- AMPK/PGC-1α signaling, neuromuscular electrical stimulation, high-frequency stimulation, low-frequency stimulation, endurance training adaptation, resistance training adaptation, muscle protein synthesis, muscle hypertrophy, mitochondrial biogenesis, UCP3, translational regulation, p70S6K, 4E-BP1
- MeSH terms
- Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha, Tuberous Sclerosis Complex 2 Protein, Adaptation, Physiological, Adenylate Kinase, Animals, Electric Stimulation, Enzyme Activation, Physical Exertion, Male, Muscle Contraction, Muscle Proteins, Myofibrils, Phosphorylation, Physical Conditioning, Animal, Physical Endurance, Protein Kinases, Sarcoplasmic Reticulum, Transcription Factors, Signal Transduction, RNA-Binding Proteins, Rats, Wistar, Muscle, Skeletal, Mitogen-Activated Protein Kinases, Tumor Suppressor Proteins, Proto-Oncogene Proteins c-akt, Rats, TOR Serine-Threonine Kinases
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