1
|
Liu C, Gao ZW, Liu YQ, Yang L, Wu XN, Dong K, Zhu XM. Down-regulation of DPP4 by TGFβ1/miR29a-3p inhibited proliferation and promoted migration of ovarian cancer cells. Discov Oncol 2023; 14:195. [PMID: 37907650 PMCID: PMC10618141 DOI: 10.1007/s12672-023-00815-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 10/27/2023] [Indexed: 11/02/2023] Open
Abstract
OBJECTIVE To explore the DPP4 expression changes and functions in ovarian cancer (OV), as well as the regulation mechanism for DDP4. METHODS GEPIA2, GSE18520, GSE26712 and UALCAN were used to analyze differences in DPP4 expression between OV tumors and control tissues. Serum DPP4 levels were measured by ELISA. The prognostic values of DPP4 were evaluated using a Kaplan-Meier (KM) plotter. Small interfering RNA was used for DPP4 knockdown in OVCAR-3 and SKOV-3 cells. CCK-8 and scratch healing assays were used to determine the cells' proliferation and migration abilities. Flow cytometry (FCM) was used to detect the cell cycle and apoptosis. A dual-luciferase assay was designed to confirm the regulatory effect of miR-29a-3p on DPP4. RESULTS The expressions of DPP4 mRNA and protein were decreased in OV tumor tissues. Serum DPP4 levels decreased in OV patients. KM plotter analysis showed correlation between high DPP4 expression and a poor prognosis in OV patients. By targeting knockdown of DPP4, we found that OVCAR-3 and SKOV-3 cells' proliferation was inhibited, while cell's migration ability was significantly promoted. FCM analysis showed that DPP4 knockdown induced a decrease in the S phase. Furthermore, DPP4 was shown to be downregulated by miR-29a-3p and TGFβ1 in OVCAR-3 cells, and miR-29a-3p expression was upregulated by TGFβ1. The effects of miR-29a-3p and TGFβ1 on OVCAR-3 cells' biological behaviors were consistent with DPP4 knockdown. CONCLUSION DPP4 was downregulated in OV patients. DPP4 knockdown significantly inhibited OVCAR-3 and SKOV-3 cell proliferation and promoted cell migration. DDP4 can be downregulated by TGFβ1 through the upregulation of miR-29a-3p in OV cells.
Collapse
Affiliation(s)
- Chong Liu
- Department of Clinical Diagnosis, Tangdu Hospital, Air Force Military Medical University, Xinsi Road, Xi'an, 710038, China
| | - Zhao-Wei Gao
- Department of Clinical Diagnosis, Tangdu Hospital, Air Force Military Medical University, Xinsi Road, Xi'an, 710038, China
| | - Ying-Qi Liu
- School of Basic Medical Sciences, Air Force Medical University, No. 4 Company, Xi'an, China
| | - Lan Yang
- Department of Clinical Diagnosis, Tangdu Hospital, Air Force Military Medical University, Xinsi Road, Xi'an, 710038, China
| | - Xia-Nan Wu
- Department of Clinical Diagnosis, Tangdu Hospital, Air Force Military Medical University, Xinsi Road, Xi'an, 710038, China
| | - Ke Dong
- Department of Clinical Diagnosis, Tangdu Hospital, Air Force Military Medical University, Xinsi Road, Xi'an, 710038, China.
| | - Xiao-Ming Zhu
- Department of Obstetrics and Gynecology, Hainan Branch of PLA General Hospital, Jianglin Road, Sanya, 572022, China.
| |
Collapse
|
2
|
Wilson AL, Moffitt LR, Wilson KL, Bilandzic M, Wright MD, Gorrell MD, Oehler MK, Plebanski M, Stephens AN. DPP4 Inhibitor Sitagliptin Enhances Lymphocyte Recruitment and Prolongs Survival in a Syngeneic Ovarian Cancer Mouse Model. Cancers (Basel) 2021; 13:cancers13030487. [PMID: 33513866 PMCID: PMC7865851 DOI: 10.3390/cancers13030487] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 01/12/2021] [Accepted: 01/19/2021] [Indexed: 02/07/2023] Open
Abstract
Simple Summary The role of immunity in the development and progression of epithelial ovarian cancer (EOC) is well established. Poor T-cell infiltration is associated with mortality in EOC patients, and recent evidence has suggested that the enzyme DPP4 plays a role in this process. The aim of our study was to evaluate the potential of the clinically-approved DPP4-inhibitor sitagliptin to improve immune responses in mice with EOC. We showed that sitagliptin improved CD8+ T-cell responses in an EOC mouse model, consequently reducing metastatic burden and prolonging survival. These data provide a rationale for the use of DPP4-inhibitors as a second-line treatment for EOC. Abstract Immunity plays a key role in epithelial ovarian cancer (EOC) progression with a well-documented correlation between patient survival and high intratumoral CD8+ to T regulatory cell (Treg) ratios. We previously identified dysregulated DPP4 activity in EOCs as a potentially immune-disruptive influence contributing to a reduction in CXCR3-mediated T-cell infiltration in solid tumours. We therefore hypothesized that inhibition of DPP4 activity by sitagliptin, an FDA-approved inhibitor, would improve T-cell infiltration and function in a syngeneic ID8 mouse model of EOC. Daily oral sitagliptin at 50 mg/kg was provided to mice with established primary EOCs. Sitagliptin treatment decreased metastatic tumour burden and significantly increased overall survival and was associated with significant changes to the immune landscape. Sitagliptin increased overall CXCR3-mediated CD8+ T-cell trafficking to the tumour and enhanced the activation and proliferation of CD8+ T-cells in tumour tissue and the peritoneal cavity. Substantial reductions in suppressive cytokines, including CCL2, CCL17, CCL22 and IL-10, were also noted and were associated with reduced CD4+ CD25+ Foxp3+ Treg recruitment in the tumour. Combination therapy with paclitaxel, however, typical of standard-of-care for patients in palliative care, abolished CXCR3-specific T-cell recruitment stimulated by sitagliptin. Our data suggest that sitagliptin may be suitable as an adjunct therapy for patients between chemotherapy cycles as a novel approach to enhance immunity, optimise T-cell-mediated function and improve overall survival.
Collapse
Affiliation(s)
- Amy L. Wilson
- Centre for Cancer Research, Hudson Institute of Medical Research, Clayton 3168, Australia; (A.L.W.); (L.R.M.); (M.B.)
- Department of Molecular and Translational Sciences, Monash Health, Clayton 3168, Australia
- Department of Immunology and Pathology, Monash University, Clayton 3800, Australia;
| | - Laura R. Moffitt
- Centre for Cancer Research, Hudson Institute of Medical Research, Clayton 3168, Australia; (A.L.W.); (L.R.M.); (M.B.)
- Department of Molecular and Translational Sciences, Monash Health, Clayton 3168, Australia
| | - Kirsty L. Wilson
- School of Health and Biomedical Sciences, RMIT University, Bundoora 3083, Australia;
| | - Maree Bilandzic
- Centre for Cancer Research, Hudson Institute of Medical Research, Clayton 3168, Australia; (A.L.W.); (L.R.M.); (M.B.)
- Department of Molecular and Translational Sciences, Monash Health, Clayton 3168, Australia
| | - Mark D. Wright
- Department of Immunology and Pathology, Monash University, Clayton 3800, Australia;
| | - Mark D. Gorrell
- Centenary Institute, Faculty of Medicine and Health, University of Sydney, Camperdown 2006, Australia;
| | - Martin K. Oehler
- Department of Gynaecological Oncology, Royal Adelaide Hospital, Adelaide 5000, Australia;
| | - Magdalena Plebanski
- School of Health and Biomedical Sciences, RMIT University, Bundoora 3083, Australia;
- Correspondence: (M.P.); (A.N.S.)
| | - Andrew N. Stephens
- Centre for Cancer Research, Hudson Institute of Medical Research, Clayton 3168, Australia; (A.L.W.); (L.R.M.); (M.B.)
- Department of Molecular and Translational Sciences, Monash Health, Clayton 3168, Australia
- Correspondence: (M.P.); (A.N.S.)
| |
Collapse
|