Volume 62, Issue 4 pp. 561-572
RESEARCH ARTICLE

Cip2a induces arginine biosynthesis and promotes tumor progression in non-small cell lung cancer

Danyang Chen

Danyang Chen

Guangzhou Key Laboratory of “Translational Medicine on Malignant Tumor Treatment”, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China

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Siwen Fan

Siwen Fan

School of Basic Medical Sciences, Guangdong Medical University, Zhanjiang, Guangdong, China

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Jun Wang

Jun Wang

Guangzhou Key Laboratory of “Translational Medicine on Malignant Tumor Treatment”, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China

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Yanqing Liang

Yanqing Liang

School of Basic Medical Sciences, Guangdong Medical University, Zhanjiang, Guangdong, China

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Pan Li

Pan Li

Guangzhou Key Laboratory of “Translational Medicine on Malignant Tumor Treatment”, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China

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Xinwu Lv

Xinwu Lv

School of Basic Medical Sciences, Guangdong Medical University, Zhanjiang, Guangdong, China

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Yanqin Sun

Yanqin Sun

School of Basic Medical Sciences, Guangdong Medical University, Zhanjiang, Guangdong, China

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Qian Wang

Qian Wang

Guangzhou Key Laboratory of “Translational Medicine on Malignant Tumor Treatment”, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China

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Hao Liu

Hao Liu

Guangzhou Key Laboratory of “Translational Medicine on Malignant Tumor Treatment”, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China

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Chuantao Zhang

Corresponding Author

Chuantao Zhang

Department of Oncology, Affiliated Hospital of Qingdao University, Qingdao, Shandong, China

Correspondence Yanmei Yi, School of Basic Medical Sciences, Guangdong Medical University, No.2 Wenmingdong Rd, Zhanjiang, Guangdong 524023, China.

Email: [email protected]

Chuantao Zhang, Department of Oncology, Affiliated Hospital of Qingdao University, No. 7 Jiaxing Rd, Qingdao, Shandong 266003, China. 

Email: [email protected]

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Yanmei Yi

Corresponding Author

Yanmei Yi

School of Basic Medical Sciences, Guangdong Medical University, Zhanjiang, Guangdong, China

Correspondence Yanmei Yi, School of Basic Medical Sciences, Guangdong Medical University, No.2 Wenmingdong Rd, Zhanjiang, Guangdong 524023, China.

Email: [email protected]

Chuantao Zhang, Department of Oncology, Affiliated Hospital of Qingdao University, No. 7 Jiaxing Rd, Qingdao, Shandong 266003, China. 

Email: [email protected]

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First published: 27 January 2023

Danyang Chen, Siwen Fan, and Jun Wang authors contributed equally to this study.

Abstract

Cancerous inhibitor of protein phosphatase 2A (Cip2a) is an oncoprotein, playing important roles in tumor progression. However, the underlying mechanisms by which Cip2a promotes tumor aggressiveness in NSCLC remain to be further investigated. In this study, we found that Cip2a expression is elevated in NSCLC and correlates with poor prognosis. Knockdown of Cip2a significantly reduced the ability of cell proliferation, invasion, and metastasis of NSCLC both in vitro and in vivo. Furthermore, we found that Cip2a promotes tumor progression partly by inducing arginine biosynthesis, and knockdown of Cip2a exhibited a significantly increased sensitivity to arginine deprivation and mTOR inhibition. In addition, we found that p53 mutants in NSCLC cells increased Cip2a expression by inhibiting the activity of wild-type p53. Our findings provide new insights into the mechanisms of Cip2a in promoting tumor progression and suggest that Cip2a represents a potential therapeutic target for treating NSCLC.

CONFLICT OF INTEREST STATEMENT

The authors declare no conflict of interest.

DATA AVAILABILITY STATEMENT

All data in our study are available upon request.

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