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In vitro anti-obesity effects of sesamol mediated by adenosine monophosphate-activated protein kinase and mitogen-activated protein kinase signaling in 3T3-L1 cells

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Abstract

Sesamol is a phenol derivative of sesame oil and a potent anti-oxidant, anti-inflammatory, anti-hepatotoxic, and anti-aging compound. We investigated the effects of sesamol on the molecular mechanisms of adipogenesis in 3T3-L1 preadipocytes. The intracellular lipid accumulation accompanied by increased extracellular release of free glycerol was decreased during differentiation on treating 3T3-L1 with sesamol. Sesamol treatment on 3T3-L1 inhibited adipogenic differentiation by down-regulating adipogenesis-related factors (C/EBPα, PPARγ, and SREBP-1). Lipid accumulation was repressed by decreasing fatty acid synthase and by up-regulating lipolysis-response genes (HSL and LPL). The molecular mechanisms of sesamol-induced inhibition in adipogenesis were mediated by increased levels of phosphorylated adenosine monophosphate-activated protein kinase and its substrate acetyl-CoA carboxylase. Sesamol treatment, in turn, modulated the different members of the mitogenactivated protein kinase family by suppressing phosphorylation of ERK 1/2 and JNK and by increasing the phosphorylation of p38. In summary, sesamol inhibits adipogenic differentiation by reducing phosphorylation levels of ERK 1/2 and JNK while inducing lipolysis by activating p38 and AMPK. Our results demonstrate that the molecular mechanisms of in vitro anti-obesity effects of sesamol are due to the combined effects of preventing both lipid accumulation and adipogenesis.

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Authors and Affiliations

  1. Department of Life Science, Dongguk University-Seoul, Goyang, Gyeonggi, 10326, Korea

    Geon Go, Jung-Suk Sung, Seung-Cheol Jee, Min Kim & Won-Hee Jang

  2. Department of Biological and Environmental Science, Dongguk University-Seoul, Goyang, Gyeonggi, 10326, Korea

    Kyu-Young Kang & Dae-Young Kim

  3. Department of Food Science and Biotechnology, Dongguk University-Seoul, Goyang, Gyeonggi, 10326, Korea

    Sihyoung Lee & Han-Seung Shin

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  1. Geon Go
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Correspondence to Han-Seung Shin.

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Go, G., Sung, JS., Jee, SC. et al. In vitro anti-obesity effects of sesamol mediated by adenosine monophosphate-activated protein kinase and mitogen-activated protein kinase signaling in 3T3-L1 cells. Food Sci Biotechnol 26, 195–200 (2017). https://doi.org/10.1007/s10068-017-0026-1

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  • DOI: https://doi.org/10.1007/s10068-017-0026-1

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