Abstract
Purpose
Despite lung cancer is one of the leading causes of cancer-related deaths, it remains hard to discover effective diagnostic and therapeutic approaches. Moreover, the five-year survival rate is relatively lower than other tumors. So urgent needs for finding a new theranostic target to treat lung cancer effectively. This study aims to present SOCS3 and NOD2 proteins as novel targets for diagnosis and therapy.
Methods
We first confirmed SOCS3 expression level in patients’ tissues. Then, we applied knockdown and overexpression of SOCS3 on lung cancer cell lines and performed proliferation, migration, and invasion assay. After that, we found NOD2 is a target of SOCS3 and introduced overexpression of NOD2 to A549 for verifying reduced tumorigenicity of lung cancer cells.
Results
We identified protein expression level of SOCS3 was frequently higher in tumor tissues than adjacent normal tissues. Truly, overexpression of SOCS3 promoted proliferation, migration, and invasion capacity of lung cancer cells. We found that SOCS3 interacts with NOD2 and SOCS3 ubiquitinates NOD2 directly. Furthermore, lung cancer tissues with higher SOCS3 expression showed lower NOD2 expression. We confirmed overexpression of NOD2 leads to suppressed tumorigenicity of lung cancer cells, and these effects occurred through MAPK pathway.
Conclusion
Collectively, our work reveals novel roles of SOCS3 in lung tumorigenesis and proposes SOCS3 as a promising biomarker candidate for therapeutic and diagnostic target for lung cancer.
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Data Availability
All data generated or analyzed during this study are included in this published article and its supplementary information files.
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All authors have also read the journal’s author agreement and manuscript has been reviewed and approved by all authors.
Funding
This study was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MIST) (NRF-2022R1A2C4002045, RS-2023-00208173, RS-2023-00207868).
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PL and GL conceptualization, IJ, JJ, JH JL, and PCL Formal analysis and investigation, Writing - original draft preparation, JY, JL, GL, PL Clinical specimen collection, Data analysis, Statistical analysis, IJ and PL Writing manuscript.All authors read and approved the final manuscript.
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Patient’s lung tissue samples Written informed consent was obtained from all the lung cancer patients who participated in this study. All experimental protocols were approved by the Institutional Review Board of Asan Medical Center and the University of Ulsan College of Medicine (2014 − 0960, 2020 − 1117). Human lung tissues were obtained through the Asan Bio Resource Center (2014-20(89)).
Animal studies All mice were bred at the animal facilities of the Asan Institute for Life Sciences, University of Ulsan College of Medicine. All animal procedures were approved by the Institutional Ethics Committee and Institutional Animal Care Committee of University of Ulsan College of Medicine (2016-02-168 and 2017-12-281).
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Jeong, Ih., Yun, J.K., Jin, JO. et al. E3 ligase SOCS3 regulates NOD2 expression by ubiquitin proteasome system in lung cancer progression. Cell Oncol. (2023). https://doi.org/10.1007/s13402-023-00896-5
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DOI: https://doi.org/10.1007/s13402-023-00896-5