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Abstract Title:

Chlorogenic acid inhibits osteosarcoma carcinogenesis via suppressing the STAT3/Snail pathway.

Abstract Source:

J Cell Biochem. 2019 Jun ;120(6):10342-10350. Epub 2018 Dec 23. PMID: 30582213

Abstract Author(s):

Fang Zhang, Guodong Yin, Xiufu Han, Xinqiang Jiang, Zhongsheng Bao

Article Affiliation:

Fang Zhang

Abstract:

Chlorogenic acid (CA) is a polyphenol compound that possesses anticancer effects on several types of tumors. However, there are few previous studies concerning the protective effects of CA on osteosarcoma. The current study aimed to examine the toxicity of CA to osteosarcoma cells and to explore the potential mechanisms. Cell growth was evaluated using cell counting kit-8 assay and Western blot analysis of proliferating cell nuclear antigen (PCNA). Apoptosis was assessed by flow cytometry analysis using flow cytometry and caspase-3/7 activity assay. The expression changes of the signal transducer and activator of transcription 3 (STAT3)/Snail pathway were detected by Western blot analysis. We found that CA dose-dependently inhibited cell viability and PCNA expression in osteosarcoma cells. Meanwhile, CA treatment increased the apoptotic rate and caspase-3/7 activity in osteosarcoma cells in a concentration-dependent manner. We found that CA concentration-dependently inhibited the activation of the STAT3/Snail pathway in osteosarcoma cells. Inhibition of the STAT3/Snail pathway by si-STAT3 retarded the growth and induced apoptosis of osteosarcoma cells. Mechanistically, activation of the STAT3/Snail pathway by pcDNA-STAT3 reversed the effects of CA on osteosarcoma cell growth and apoptosis. In conclusion, CA inhibited osteosarcoma carcinogenesis by suppressing osteosarcoma cell growth and inducing apoptosis, which was involved in inactivation of the STAT3/Snail pathway. Therefore, our study suggested that CA might have good therapy prospects in osteosarcoma therapy.

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