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5′ Adenosine Monophosphate-Activated Protein Kinase, Metabolism and Exercise

Publikation: Bidrag til tidsskriftReviewForskningfagfællebedømt

The 5′ adenosine monophosphate-activated protein kinase (AMPK) is a member of a metabolite-sensing protein kinase family that functions as a metabolic 'fuel gauge' in skeletal muscle. AMPK is a ubiquitous heterotrimeric protein, consisting of an α catalytic, and β and γ regulatory subunits that exist in multiple isoforms and are all required for full enzymatic activity. During exercise, AMPK becomes activated in skeletal muscle in response to changes in cellular energy status (e.g. increased adenosine monophosphate [AMP]/adenosine triphosphate [ATP] and creatine/phosphocreatine ratios) in an intensity-dependent manner, and serves to inhibit ATP-consuming pathways, and activate pathways involved in carbohydrate and fatty-acid metabolism to restore ATP levels. Recent evidence shows that although AMPK plays this key metabolic role during acute bouts of exercise, it is also an important component of the adaptive response of skeletal muscles to endurance exercise training because of its ability to alter muscle fuel reserves and expression of several exercise-responsive genes. This review discusses the putative roles of AMPK in acute and chronic exercise responses, and suggests avenues for future AMPK research in exercise physiology and biochemistry.

OriginalsprogEngelsk
TidsskriftSports Medicine
Vol/bind34
Udgave nummer2
Sider (fra-til)91-103
Antal sider13
ISSN0112-1642
DOI
StatusUdgivet - 12 mar. 2004
Eksternt udgivetJa

ID: 239777808