Activation of glycogen phosphorylase and glycogenolysis in rat skeletal muscle by AICAR — an activator of AMP-activated protein kinase
<p>We determined whether the cell permeable molecule AICAR, whose metabolite activates AMP-activated protein kinase (AMPK) in cells, affected glycogen metabolism in rat seleus muscle preparations in vitro. The basal and insulin-stimulated rates of radiochemical lactate formation, net lactate r...
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| Other Authors: | |
| Format: | Journal article |
| Language: | English |
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Elsevier
1996
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| Summary: | <p>We determined whether the cell permeable molecule AICAR, whose metabolite activates AMP-activated protein kinase (AMPK) in cells, affected glycogen metabolism in rat seleus muscle preparations in vitro. The basal and insulin-stimulated rates of radiochemical lactate formation, net lactate release and glycogen synthesis were determined. AICAR stimulated net lactate release (but not radiochemical lactate formation) only at a basal concentration of insulin. An increased rate of glycogenolysis was the likely cause of increased net lactate release as glycogen phosphorylase activity was significantly increased by AICAR. AICAR-stimulated net lactate release and phosphorylase activity were potently inhibited by insulin.</p> |
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