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The Natural Product Fucoidan Inhibits Proliferation and Induces Apoptosis of Human Ovarian Cancer Cells: Focus on the PI3K/Akt Signaling Pathway

Authors Liu S, Yang J, Peng X, Li J, Zhu C

Received 20 March 2020

Accepted for publication 16 May 2020

Published 23 July 2020 Volume 2020:12 Pages 6195—6207

DOI https://doi.org/10.2147/CMAR.S254784

Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Dr Sanjeev Srivastava


Shuhan Liu,1 Jing Yang,2 Xudong Peng,3 Jingjing Li,4 Cunjing Zhu2

1Department of Reproductive Medicine, Jining First People’s Hospital, Jining 272000, People’s Republic of China; 2Department of Gynecology, Jining First People’s Hospital, Jining 272000, People’s Republic of China; 3Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao 266000, People’s Republic of China; 4Department of Gastroenterology, The Affiliated Hospital of Qingdao University, Qingdao 266000, People’s Republic of China

Correspondence: Cunjing Zhu Tel +86-0537-60566666
Email zhucunjing@126.com

Objective: Ovarian cancer (OC) is the leading cause of death among gynecological tumors; however, no effective treatment is currently available. Fucoidan, which is extracted from marine algae, has significant anti-cancer effects. The aim of this study was to determine the effects of fucoidan on the proliferation and apoptosis of OC cells through inhibition of the PI3K/Akt signaling pathway.
Methods: Human ovarian normal epithelial cells (IOSE80) and human OC cells (SKOV-3, A2780, OVCAR-3, TOV-112D, and Caov-3) were selected to verify the safety of fucoidan at various doses in SKOV-3 and Caov-3 cells as well as a xenograft mouse model using various molecular biology techniques.
Results: Fucoidan had no significant effect on normal ovarian epithelial cells, but had significantly inhibited the proliferation of OC cells, induced cell cycle arrest at the G0/G1 phase, increased the proportion of apoptotic cells and expression of pro-apoptotic proteins, and inhibited the expression of PI3K and phosphorylation of Akt, which could be partly rescued by IGF-1.
Conclusion: Fucoidan had anti-tumor effects both in vivo and in vitro via a mechanism that is related to the inhibition of the PI3K/Akt signaling pathway.

Keywords: ovarian cancer, fucoidan, cell cycle, apoptosis, PI3K/Akt

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