J Cancer 2014; 5(5):382-389. doi:10.7150/jca.8024

Research Paper

Carnosine Inhibits the Proliferation of Human Gastric Carcinoma Cells by Retarding Akt/mTOR/p70S6K Signaling

Zhenwei Zhang1,3,#, Lei Miao2,#, Xin Wu1,4, Guangze Liu1, Yuting Peng1,4, Xiaoming Xin2,5, Binghua Jiao3, Xiangping Kong1,✉

1. Key Laboratory of Liver Disease, Center of Infectious Diseases, Guangzhou 458 Hospital, Guangzhou, China
2. Department of Pharmacology, School of Pharmacy and Institute of Biomedical Sciences, Fudan University, Shanghai, China
3. Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
4. Institute of Life Science and Bio-pharmaceutics, Shenyang Pharmaceutical University, Shenyang, China
5. Department of pharmacology, Taishan Medical University, Tai'an, China
# These authors contributed equally to this paper.

Abstract

Carnosine (β-alanyl-L-histidine), described as an enigmatic peptide for its antioxidant, anti-aging and especially antiproliferation properties, has been demonstrated to play an anti-tumorigenic role in certain types of cancer. However, its function in human gastric carcinoma remains unclear. In this study, the effect of carnosine on cell proliferation and its underlying mechanisms were investigated in the cultured human gastric carcinoma cells. The mTOR signaling axis molecules were analyzed in carnosine treated cells. The results showed that treatment with carnosine led to proliferation inhibition, cell cycle arrest in the G0/G1 phase, apoptosis increase, and inhibition of mTOR signaling activation by decreasing the phosphorylation of Akt, mTOR and p70S6K, suggesting that proliferation inhibition of carnosine in human gastric carcinoma was through the inhibition of Akt/mTOR/p70S6K pathway, and carnosine would be a mimic of rapamycin.

Keywords: Carnosine, rapamycin, proliferation, gastric carcinoma cell, mTOR signalling pathway

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How to cite this article:
Zhang Z, Miao L, Wu X, Liu G, Peng Y, Xin X, Jiao B, Kong X. Carnosine Inhibits the Proliferation of Human Gastric Carcinoma Cells by Retarding Akt/mTOR/p70S6K Signaling. J Cancer 2014; 5(5):382-389. doi:10.7150/jca.8024. Available from http://www.jcancer.org/v05p0382.htm