CAPE (caffeic acid phenethyl ester) stimulates glucose uptake through AMPK (AMP-activated protein kinase) activation in skeletal muscle cells |
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Authors: | Lee Eun Soo Uhm Kyung-Ok Lee Yun Mi Han MyungSuk Lee MyungSik Park Ji Man Suh Pann-Ghill Park Sun-Hwa Kim Hyeon Soo |
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Affiliation: | Department of Anatomy, Korea University College of Medicine, 126-1 Anam-dong 5-ga, Seongbuk-gu, Seoul 136-705, South Korea. |
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Abstract: | Caffeic acid phenethyl ester (CAPE), a flavonoid-like compound, is one of the major components of honeybee propolis. In the present study, we investigated the metabolic effects of CAPE in skeletal muscle cells and found that CAPE stimulated glucose uptake in differentiated L6 rat myoblast cells and also activated AMPK (AMP-activated protein kinase). In addition, the inhibition of AMPK blocked CAPE-induced glucose uptake, and CAPE activated the Akt pathway in a PI3K (phosphoinositide 3-kinase)-dependent manner. Furthermore, CAPE enhanced both insulin-mediated Akt activation and glucose uptake. In summary, our results suggest that CAPE may have beneficial roles in glucose metabolism via stimulation of the AMPK pathway. |
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Keywords: | ACC, acetyl-CoA carboxylase AICAR, 5-aminoimidazole-4-carboxy-amide-1-D-ribofuranoside AMPK, AMP-activated protein kinase CAPE, caffeic acid phenethyl ester PI3K, phosphoinositide 3-kinase |
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