The AMPK (5´AMP-activated protein kinase) is becoming recognized as a critical regulator of energy metabolism. However, many of these effects in muscle metabolism have been ascribed to AMPK based on the use of the unspecific activator AICAR (5-aminoimidazole-4-carboxamide-1-β-d-ribofuranoside). Using mouse models in which AMPK activity has been specifically blocked (kinase dead) or knocked out we and others have been able to conduct studies gaining more conclusive data on the role of AMPK in muscle metabolism. In this mini-review focus is on AMPK and its regulatory role for glucose transport and GS (glycogen synthase) activity in skeletal muscle, indicating that AMPK is a GS kinase in vivo which might influence GS activity during exercise and that AMPK is involved in AICAR/hypoxia-induced glucose transport but not or only partially in contraction-stimulated glucose transport.
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December 2003
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Conference Article|
December 01 2003
Transgenic models – a scientific tool to understand exercise-induced metabolism: the regulatory role of AMPK (5′-AMP-activated protein kinase) in glucose transport and glycogen synthase activity in skeletal muscle
J.F.P. Wojtaszewski;
J.F.P. Wojtaszewski
1
Copenhagen Muscle Research Centre, Institute of Exercise and Sport Sciences, University of Copenhagen, 13, Universitetsparken, 2100-Copenhagen, Denmark
1To whom correspondence should be addressed (e-mail jwojtaszewski@aki.ku.dk).
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J.N. Nielsen;
J.N. Nielsen
Copenhagen Muscle Research Centre, Institute of Exercise and Sport Sciences, University of Copenhagen, 13, Universitetsparken, 2100-Copenhagen, Denmark
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S.B. Jørgensen;
S.B. Jørgensen
Copenhagen Muscle Research Centre, Institute of Exercise and Sport Sciences, University of Copenhagen, 13, Universitetsparken, 2100-Copenhagen, Denmark
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C. Frøsig;
C. Frøsig
Copenhagen Muscle Research Centre, Institute of Exercise and Sport Sciences, University of Copenhagen, 13, Universitetsparken, 2100-Copenhagen, Denmark
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J.B. Birk;
J.B. Birk
Copenhagen Muscle Research Centre, Institute of Exercise and Sport Sciences, University of Copenhagen, 13, Universitetsparken, 2100-Copenhagen, Denmark
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E.A. Richter
E.A. Richter
Copenhagen Muscle Research Centre, Institute of Exercise and Sport Sciences, University of Copenhagen, 13, Universitetsparken, 2100-Copenhagen, Denmark
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Publisher: Portland Press Ltd
Online ISSN: 1470-8752
Print ISSN: 0300-5127
© 2003 Biochemical Society
2003
Biochem Soc Trans (2003) 31 (6): 1290–1294.
Citation
J.F.P. Wojtaszewski, J.N. Nielsen, S.B. Jørgensen, C. Frøsig, J.B. Birk, E.A. Richter; Transgenic models – a scientific tool to understand exercise-induced metabolism: the regulatory role of AMPK (5′-AMP-activated protein kinase) in glucose transport and glycogen synthase activity in skeletal muscle. Biochem Soc Trans 1 December 2003; 31 (6): 1290–1294. doi: https://doi.org/10.1042/bst0311290
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