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KMID : 1161420220250070793
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Journal of Medicinal Food
2022 Volume.25 No. 7 p.793 ~ p.796
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Silymarin Prevents High-Fat Diet-Induced Muscle Atrophy by Regulating Protein Degradation and Synthesis in Mice
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Kim Shin-Tae
You Yang-Hee
Kim Ok-Kyung
Lee Jeong-Min
Chung Jin-Woong
Shim Sang-In
Kim Kyung-Mi
Park Jeong-Jin
Jun Woo-Jin
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Abstract
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Silymarin is found in Silybum marianum. We investigated the effect of silymarin on muscle atrophy in obese mice. The experimental mice were divided into three groups: CON, normal diet; HFD, 60% high-fat diet (HF); and SILY: 50?mg silymarin +60% HF. It was confirmed that increases in body weight and fat mass in the SILY group were significantly inhibited. Moreover, the muscle mass in SILY mice was significantly higher than that in the HFD group. The grip strength in HFD group was significantly reduced, whereas in the SILY group it was higher than that in HFD group. In HFD mice, the mRNA levels of protein degradation factors (muscle ring-finger protein 1 [MuRF-1] and Atrogin-1) were increased and protein synthesis factors (phosphoinositide 3-kinase [PI3K] and Akt) were decreased. However, silymarin was found to elevate the degradation factors as compared with HFD group, whereas it reduced the synthesis factors. The results suggest that silymarin could prevent not only obesity but also muscle atrophy.
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KEYWORD
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muscle atrophy, obesity, protein degradation, protein synthesis, silymarin
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