PMID- 38218360 OWN - NLM STAT- MEDLINE DCOM- 20240204 LR - 20240223 IS - 1096-0384 (Electronic) IS - 0003-9861 (Linking) VI - 752 DP - 2024 Feb TI - FKBP38 suppresses endometrial cancer cell proliferation and metastasis by inhibiting the mTOR pathway. PG - 109891 LID - S0003-9861(24)00010-9 [pii] LID - 10.1016/j.abb.2024.109891 [doi] AB - Endometrial cancer (EC) is a common gynecological malignancy, and advanced-stage or recurrent EC is associated with a high mortality rate owing to the ineffectiveness of currently available treatments. FK506-binding protein 38 (FKBP38) is a member of the immunophilin family and inhibits melanoma and breast cancer cell metastasis. However, the functions of FKBP38 and its potential mechanism in EC remain unclear. Herein, we analyzed the expression levels of FKBP38 in EC cells and found that the FKBP38 expression was high in Ishikawa cells, and low in AN3CA cells, traditionally considered a low grade and a high grade cell line, respectively, in pathology classification. Moreover, FKBP38 inhibited cell proliferation, migration and invasion in EC cells, FKBP38 knockdown significantly promoted tumor growth of Ishikawa cells in a subcutaneous xenograft model and increased the number of lung metastases of Hec-1-A cells in a metastatic mouse model. Furthermore, FKBP38 suppressed several target proteins of epithelial-to-mesenchymal transition (EMT) and reduced the phosphorylation of ribosomal S6 protein (S6), eukaryotic initiation factor 4E-binding protein 1 (4EBP-1), indicating the potent inhibition of the mammalian target of rapamycin (mTOR) pathway. Meanwhile, the inhibition of mTOR neutralized the elevation of EC cell proliferation, migration and invasion after FKBP38 knockdown. In summary, FKBP38 would exert a tumor-suppressing role by modulating the mTOR pathway. Our results indicate that FKBP38 may be considered as a factor of EC metastasis and a new target for EC therapeutic intervention. CI - Copyright (c) 2024 Elsevier Inc. All rights reserved. FAU - Yan, Yunjing AU - Yan Y AD - The School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong Province, PR China. FAU - Wang, Shuai AU - Wang S AD - The School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong Province, PR China. FAU - Zhang, Zongmeng AU - Zhang Z AD - The School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong Province, PR China. FAU - Tang, Minyi AU - Tang M AD - The School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong Province, PR China. FAU - Zhao, Allan Z AU - Zhao AZ AD - The School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong Province, PR China. FAU - Li, Zhuang AU - Li Z AD - The School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong Province, PR China. FAU - Wu, Xiaoli AU - Wu X AD - The School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong Province, PR China. Electronic address: wuxiaoli@gdut.edu.cn. FAU - Li, Fanghong AU - Li F AD - The School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, Guangdong Province, PR China. Electronic address: fli@gdut.edu.cn. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20240111 PL - United States TA - Arch Biochem Biophys JT - Archives of biochemistry and biophysics JID - 0372430 RN - EC 5.2.1.- (Tacrolimus Binding Proteins) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - 0 (FKBP8 protein, human) RN - EC 2.7.1.1 (MTOR protein, human) SB - IM MH - Animals MH - Female MH - Humans MH - Mice MH - Cell Line, Tumor MH - Cell Movement MH - Cell Proliferation MH - *Endometrial Neoplasms/metabolism MH - Mammals/metabolism MH - Signal Transduction/physiology MH - *Tacrolimus Binding Proteins/metabolism MH - TOR Serine-Threonine Kinases/metabolism OTO - NOTNLM OT - EMT pathway OT - Endometrial cancer OT - FKBP38 OT - Metastasis OT - Proliferation OT - mTOR pathway COIS- Declaration of competing interest The authors declare no potential conflicts of interest. EDAT- 2024/01/14 12:42 MHDA- 2024/01/29 06:43 CRDT- 2024/01/13 19:31 PHST- 2023/08/20 00:00 [received] PHST- 2023/12/26 00:00 [revised] PHST- 2024/01/10 00:00 [accepted] PHST- 2024/01/29 06:43 [medline] PHST- 2024/01/14 12:42 [pubmed] PHST- 2024/01/13 19:31 [entrez] AID - S0003-9861(24)00010-9 [pii] AID - 10.1016/j.abb.2024.109891 [doi] PST - ppublish SO - Arch Biochem Biophys. 2024 Feb;752:109891. doi: 10.1016/j.abb.2024.109891. Epub 2024 Jan 11.