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Overexpressed PKMYT1 promotes tumor progression and associates with poor survival in esophageal squamous cell carcinoma

Authors Zhang Q, Zhao X, Zhang C, Wang W, Li F, Liu D, Wu K, Zhu D, Liu S, Shen C, Yuan X, Zhang K, Yang Y, Zhang Y, Zhao S

Received 3 May 2019

Accepted for publication 25 July 2019

Published 19 August 2019 Volume 2019:11 Pages 7813—7824

DOI https://doi.org/10.2147/CMAR.S214243

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Nicola Ludin

Peer reviewer comments 2

Editor who approved publication: Dr Ahmet Emre Eskazan


Qingyi Zhang,1,* Xuan Zhao,2,* Chaoqi Zhang,3 Wei Wang,4 Feng Li,5 Donglei Liu,1 Kai Wu,1 Dengyan Zhu,1 Shasha Liu,2 Chunyi Shen,2 Xin Yuan,6 Kai Zhang,2 Yang Yang,1 Yi Zhang,2 Song Zhao1,7

1Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou University, Henan Province 450052, People’s Republic of China; 2Biotherapy Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, People’s Republic of China; 3Department of Thoracic Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, People’s Republic of China; 4Henan Medical Association, Zhengzhou, Henan Province 450000, People’s Republic of China; 5Department of Surgery, Competence Center of Thoracic Surgery, Charité University Hospital Berlin, Berlin 10117, Germany; 6Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Henan Province 450052, People’s Republic of China; 7Key Laboratory of Thoracic Tumor of Zhengzhou City, Zhengzhou, Henan 450052, People’s Republic of China

Correspondence: Song Zhao
Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou University, Henan province 450052, People’s Republic of China
Tel +86 1 367 366 5008
Email 13673665008@163.com

Yi Zhang
Biotherapy Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, People’s Republic of China
Tel +86 1 513 892 8971
Email yizhang@zzu.edu.cn

*These authors contributed equally to this work

Background: Esophageal squamous cell carcinoma (ESCC) is one of the most common malignant tumors worldwide and the 5-year overall survival rate remains poor. Protein kinase, membrane associated tyrosine/threonine (PKMYT1) is overexpressed in several cancers and participate in tumor progression. However, the mechanism of PKMYT1 in ESCC is unclear.
Purpose: The objective of our study was to demonstrate the the expression and role of PKMYT1 in ESCC.
Patients and methods:  We detected the expression of PKMYT1 in ESCC patients and analysed the correlation with overall survival time and disease-free survival time. Then we detected PKMYT1 expression in ESCC cell lines and immortalized human esophageal epithelial cell line. Down-regulated PKMYT1 was carried out in KYSE70 and KYSE450 cells to invetigate the mechanism of PKMYT1 in ESCC cells.
Results: PKMYT1 was up-regulated in tumor tissues and ESCC cell lines, and higher expression of PKMYT1 correlated with poorer overall survival in ESCC patients. Besides, in ESCC cell lines KYSE70 and KYSE450, knocking down PKMYT1 allowed more cells to skip G2/M checkpoint to complete mitosis, which promoted cell apoptosis, inhibited cell proliferation, and prevented the EMT phenotype in vitro. Meantime, we also observed that down-regulated PKMYT1 in ESCC cells suppressed AKT/mTOR signaling pathway. These results demonstrated PKMYT1 may act as an oncogene in ESCC.
Conclusion: PKMYT1 plays an crutial role in ESCC progression, downregulated PKMYT1 might inhibit the development of ESCC by AKT/mTOR signaling pathway, and might be a novel target in the treatment of ESCC.

Keywords: ESCC, PKMYT1, AKT, EMT, cell apoptosis

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