Abstract
Prostate cancer (PCA) is an epithelial malignant tumor occurring in the prostate gland. It is the second most common male cancer in the world and one of the top five cancer deaths in men. To combat this disease, it is needed to identify important tumor suppressor genes and elucidate the molecular mechanisms. S100 calcium-binding protein A14 (S100A14), a member of the S100 family, is located on chromosome 1q21.3 and contains an EF-hand motif that binds calcium. S100A14 is involved in a variety of tumor biological processes in several types of cancers. Its expression level and related biological functions are tissue or tumor specific. However, its possible effects on prostate cancer are still unclear. Herein, we found the low expression of S100A14 in human prostate cancer tissues and cell lines. S100A14 suppressed the proliferation of prostate cancer cells and promoted cell apoptosis. Additionally, S100A14 suppressed the motility and EMT processes of prostate cancer cells. We further found S100A14 promoted the expression of FAT1 and activated the Hippo pathway, which, therefore, suppressed the prostate cancer progression. The in vivo assays confirmed that S100A14 suppressed tumor growth of prostate cancer cells through FAT1-mediated Hippo pathway in mice. In conclusion, we clarified the mechanism underlying S100A14 suppressing prostate cancer progression and, therefore, we thought S100A14 could serve as a tumor suppressor protein.
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Funding
This work was supported by the Fujian Natural Sciences Foundation. (Grant no. 2017J01203), Joint Funds for the Innovation of Science and Technology, Fujian Province (Grant no. 2017Y9023) and Startup Fund for scientific research, Fujian Medical University (Grant no. 2018QH1044).
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SJ and YZ designed the study, supervised the data collection, SJ, ZC and ZH analyzed the data, interpreted the data, BL, YX, ZL, ZL and ML prepare the manuscript for publication and reviewed the draft of the manuscript. All authors have read and approved the manuscript.
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All procedures performed in studies involving human participants were in accordance with the standards upheld by the Ethics Committee of Fujian Medical University Union Hospital and with those of the 1964 Helsinki Declaration and its later amendments for ethical research involving human subjects (Approval No. 2020KY0112). All animal experiments were approved by the Ethics Committee of Fujian Medical University Union Hospital for the use of animals and conducted in accordance with the National Institutes of Health Laboratory Animal Care and Use Guidelines (Approval No. 2020-047).
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Jiang, S., Zhu, Y., Chen, Z. et al. S100A14 inhibits cell growth and epithelial–mesenchymal transition (EMT) in prostate cancer through FAT1-mediated Hippo signaling pathway. Human Cell 34, 1215–1226 (2021). https://doi.org/10.1007/s13577-021-00538-8
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DOI: https://doi.org/10.1007/s13577-021-00538-8