Full Text:   <2934>

Summary:  <2013>

Suppl. Mater.: 

CLC number: Q946.84

On-line Access: 2024-08-27

Received: 2023-10-17

Revision Accepted: 2024-05-08

Crosschecked: 2018-02-10

Cited: 0

Clicked: 7031

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Le Ying

https://orcid.org/0000-0002-8178-7874

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Journal of Zhejiang University SCIENCE B 2018 Vol.19 No.3 P.199-210

http://doi.org/10.1631/jzus.B1700162


In vitro antioxidant activity of phenolic-enriched extracts from Zhangping Narcissus tea cake and their inhibition on growth and metastatic capacity of 4T1 murine breast cancer cells


Author(s):  Le Ying, De-dong Kong, Yuan-yuan Gao, Feng Yan, Yue-fei Wang, Ping Xu

Affiliation(s):  Department of Tea Science, Zhejiang University, Hangzhou 310058, China; more

Corresponding email(s):   zdxp@zju.edu.cn

Key Words:  Oolong tea, Antioxidant activity, Metastasis, Cell cycle



Abstract: 
Phenolics, as the main bioactive compounds in tea, have been suggested to have potential in the prevention of various human diseases. However, little is known about phenolics and their bioactivity in Zhangping Narcissue tea cake which is considered the most special kind of oolong tea. To unveil its bioactivity, three phenolic-enriched extracts were obtained from Zhangping Narcissue tea cake using ethyl acetate, n-butanol, and water. Their main chemical compositions and in vitro bioactivity were analyzed by high-performance liquid chromatography (HPLC) and ultra-performance liquid chromatography-mass spectrometry (UPLC-MS). The ethyl acetate fraction (ZEF) consisted of higher content of phenolics, flavonoids, procyanidins, and catechin monomers (including epigallocatechin gallate (EGCG), epicatechin gallate (ECG), and gallocatechin gallate (GCG)) than n-butanol fraction (ZBF) and water fraction (ZWF). ZEF exhibited the strongest antioxidant capacity in vitro due to its abundant bioactive compounds. This was validated by Pearson correlation and hierarchical clustering analyses. ZEF also showed a remarkable inhibition on the growth, migration, and invasion of 4T1 murine breast cancer cells.

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