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黑参激活Akt信号通路,从而增强成肌细胞分化和肌管生长。

Black ginseng activates Akt signaling, thereby enhancing myoblast differentiation and myotube growth.

作者信息

Lee Soo-Yeon, Go Ga-Yeon, Vuong Tuan Anh, Kim Jee Won, Lee Sullim, Jo Ayoung, An Jun Min, Kim Su-Nam, Seo Dong-Wan, Kim Jin-Seok, Kim Yong Kee, Kang Jong-Sun, Lee Sang-Jin, Bae Gyu-Un

机构信息

Research Center for Cell Fate Control, College of Pharmacy, Sookmyung Women's University, Seoul, Republic of Korea.

Department of Molecular Cell Biology, Single Cell Network Research Center, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea.

出版信息

J Ginseng Res. 2018 Jan;42(1):116-121. doi: 10.1016/j.jgr.2017.08.009. Epub 2017 Sep 6.

DOI:10.1016/j.jgr.2017.08.009
PMID:29348730
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5766703/
Abstract

BACKGROUND

Black ginseng (BG) has greatly enhanced pharmacological activities relative to white or red ginseng. However, the effect and molecular mechanism of BG on muscle growth has not yet been examined. In this study, we investigated whether BG could regulate myoblast differentiation and myotube hypertrophy.

METHODS

BG-treated C2C12 myoblasts were differentiated, followed by immunoblotting for myogenic regulators, immunostaining for a muscle marker, myosin heavy chain or immunoprecipitation analysis for myogenic transcription factors.

RESULTS

BG treatment of C2C12 cells resulted in the activation of Akt, thereby enhancing heterodimerization of MyoD and E proteins, which in turn promoted muscle-specific gene expression and myoblast differentiation. BG-treated myoblasts formed larger multinucleated myotubes with increased diameter and thickness, accompanied by enhanced Akt/mTOR/p70S6K activation. Furthermore, the BG treatment of human rhabdomyosarcoma cells restored myogenic differentiation.

CONCLUSION

BG enhances myoblast differentiation and myotube hypertrophy by activating Akt/mTOR/p70S6k axis. Thus, our study demonstrates that BG has promising potential to treat or prevent muscle loss related to aging or other pathological conditions, such as diabetes.

摘要

背景

与白参或红参相比,黑参具有显著增强的药理活性。然而,黑参对肌肉生长的影响及其分子机制尚未得到研究。在本研究中,我们调查了黑参是否能够调节成肌细胞分化和肌管肥大。

方法

对经黑参处理的C2C12成肌细胞进行分化,随后对生肌调节因子进行免疫印迹分析、对肌肉标志物肌球蛋白重链进行免疫染色,或对生肌转录因子进行免疫沉淀分析。

结果

用黑参处理C2C12细胞导致Akt激活,从而增强MyoD和E蛋白的异二聚化,进而促进肌肉特异性基因表达和成肌细胞分化。经黑参处理的成肌细胞形成了更大的多核肌管,其直径和厚度增加,同时Akt/mTOR/p70S6K激活增强。此外,用黑参处理人横纹肌肉瘤细胞可恢复生肌分化。

结论

黑参通过激活Akt/mTOR/p70S6k轴增强成肌细胞分化和肌管肥大。因此,我们的研究表明,黑参在治疗或预防与衰老或其他病理状况(如糖尿病)相关的肌肉损失方面具有广阔的潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5edb/5766703/de76b750b4e4/figs2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5edb/5766703/9f63931b832f/gr1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5edb/5766703/082420cb08cc/gr2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5edb/5766703/e5511d00a2ad/gr3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5edb/5766703/680599238874/gr4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5edb/5766703/f8a5dd18c388/figs1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5edb/5766703/de76b750b4e4/figs2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5edb/5766703/9f63931b832f/gr1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5edb/5766703/082420cb08cc/gr2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5edb/5766703/e5511d00a2ad/gr3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5edb/5766703/680599238874/gr4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5edb/5766703/f8a5dd18c388/figs1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5edb/5766703/de76b750b4e4/figs2.jpg

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