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Published in: BMC Cancer 1/2021

01-12-2021 | NSCLC | Research

Osteopontin isoform c promotes the survival of cisplatin-treated NSCLC cells involving NFATc2-mediated suppression on calcium-induced ROS levels

Authors: Jing Huang, Mu Hu, Huan Niu, Jing Wang, Yang Si, Shan Cheng, Wei Ding

Published in: BMC Cancer | Issue 1/2021

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Abstract

Background

Tumor microenvironment (TME) critically contributed to the malignant progression of transformed cells and the chemical responses to chemotherapy reagents. Osteopontin (OPN) is a secretory onco-protein with several splicing isoforms, all of which were known to regulate tumor growth and able to alter cell-cell or cell-TME communication, however, the exact role and regulation of the OPN splicing isoforms was not well understood.

Methods

In this study, the effects of conditioned medium from the culture of OPN splicing isoforms overexpressing cells on cell functions were evaluated. The methods of nuclear calcium reporter assays and subcellular distribution of nuclear factor of activated T cells c2 (NFATc2) assays were used to investigate the molecular mechanism underlining the roles of OPN splicing isoforms.

Results

We found that the survival of NSCLC cells treated with cisplatin was increased by secretory OPNc in the condition medium, where reduction of apoptosis by OPNc was associated with the activation of cellular calcium signals and subsequent nuclear translocation of NFATc2.

Conclusions

The results revealed a mechanism of OPN and downstream signal for tumor cells to survive in chemo-stressed TME, which emphasized the importance of secretory proteins in alternative splicing isoforms. Our study not only demonstrated the importance of OPN neutralization for anti-tumor effects, but also implied that modulation in calcium/NFATc2/ROS axis could be a novel approach for improving the long-term outcome of NSCLC treatment.
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Literature
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go back to reference T Qi, H Yang, X Fan, T Zhao, Y Guo, W Ding, H Ye. 2015., 31(06): 592–598(in Chinese). T Qi, H Yang, X Fan, T Zhao, Y Guo, W Ding, H Ye. 2015., 31(06): 592–598(in Chinese).
Metadata
Title
Osteopontin isoform c promotes the survival of cisplatin-treated NSCLC cells involving NFATc2-mediated suppression on calcium-induced ROS levels
Authors
Jing Huang
Mu Hu
Huan Niu
Jing Wang
Yang Si
Shan Cheng
Wei Ding
Publication date
01-12-2021
Publisher
BioMed Central
Keywords
NSCLC
NSCLC
Published in
BMC Cancer / Issue 1/2021
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/s12885-021-08495-z

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