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Therapeutic Effects and Repair Mechanism of HGF Gene-Transfected Mesenchymal Stem Cells on Injured Endometrium. Stem Cells Int 2022; 2022:5744538. [PMID: 35422866 PMCID: PMC9005300 DOI: 10.1155/2022/5744538] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 01/25/2022] [Accepted: 03/08/2022] [Indexed: 11/18/2022] Open
Abstract
There are many studies on the advantages of using mesenchymal stem cells (MSCs) that secrete various paracrine factors for repairing endometrial injury. However, the stability and effectiveness of MSCs require improvement to become a viable therapy. Hepatocyte growth factor (HGF), one of the cytokines secreted by MSCs, promotes vascular repair and mesenchymal to epithelial transformation (MET). Therefore, HGF likely promotes the repair process of the endometrium. We prepared MSCs transfected with the HGF gene to explore its repair effects and mechanism using a damaged endometrium mouse model. HGF gene-transfected MSCs were prepared by electroporation. The transfected MSCs retained their cellular characteristics and significantly increased the expression of HGF (
). HGF gene-transfected MSCs helped damaged endometrium to recover its morphological characteristics, improved proliferation and decreased apoptosis of endometrial cells, increased the expression of endometrial vascular growth-related factors, and activated phosphorylated c-Met and AKT in the mouse endometrial damage model (
). Compared with normal MSCs, HGF gene-transfected MSCs produced a more significant effect on damaged endometrial epithelium repair by activating the HGF/c-Met and downstream signaling pathways. Our results indicate that HGF gene-transfected MSCs provide an effective and promising tool for injured endometrium therapy.
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Mielgo-Rubio X, Martín M, Remon J, Higuera O, Calvo V, Jarabo JR, Conde E, Luna J, Provencio M, De Castro J, López-Ríos F, Hernando-Trancho F, Couñago F. Targeted therapy moves to earlier stages of non-small-cell lung cancer: emerging evidence, controversies and future challenges. Future Oncol 2021; 17:4011-4025. [PMID: 34337973 DOI: 10.2217/fon-2020-1255] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Lung cancer continues to be the leading cause of cancer mortality and a serious health problem despite the numerous advances made in the last decade and the rapid advance of research in this field. In recent years, there has been a decrease in mortality from lung cancer coinciding with the approval times of targeted therapy. To date, targeted therapy has been used in the context of advanced disease in clinical practice, with great benefits in survival and quality of life. The next step will be to incorporate targeted therapy into the treatment of earlier stages of non-small-cell lung cancer, and there is already a randomized trial showing a disease-free survival benefit. However, there are many questions that need to be resolved first. In the present review, the authors discuss the findings of published reports and ongoing clinical trials assessing the role of targeted therapies in nonmetastatic disease.
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Affiliation(s)
- Xabier Mielgo-Rubio
- Department of Medical Oncology, Hospital Universitario Fundación Alcorcón, Budapest 1 Alcorcón, Madrid 28922, Spain
| | - Margarita Martín
- Department of Radiation Oncology, Ramón y Cajal University Hospital, M-607, km. 9, 100, Madrid 28034, Spain
| | - Jordi Remon
- Department of Medical Oncology, Centro Integral Oncológico Clara Campal, Hospital HM Delfos, HM Hospitales, Barcelona, Spain
| | - Oliver Higuera
- Department of Medical Oncology, Hospital Universitario La Paz, Paseo de la Castellana 261, Madrid 28046, Spain
| | - Virginia Calvo
- Department of Medical Oncology, Puerta de Hierro Hospital, Joaquín Rodrigo 1, Majadahonda, Madrid 28222, Spain
| | - José Ramón Jarabo
- Department of Thoracic Surgery, Hospital Clínico San Carlos, Calle del Profesor Martín Lagos, s/n, Madrid 28040, Spain
| | - Esther Conde
- Department of Pathology, Hospital Universitario 12 de Octubre, Madrid 28041, Spain
| | - Javier Luna
- Department of Radiation Oncology, Fundación Jiménez Díaz, Oncohealth Institute, Avda. Reyes Católicos 2, Madrid 28040, Spain
| | - Mariano Provencio
- Department of Medical Oncology, Puerta de Hierro Hospital, Joaquín Rodrigo 1, Majadahonda, Madrid 28222, Spain
| | - Javier De Castro
- Department of Medical Oncology, Hospital Universitario La Paz, Paseo de la Castellana 261, Madrid 28046, Spain
| | - Fernando López-Ríos
- Department of Pathology, Hospital Universitario 12 de Octubre, Madrid 28041, Spain
| | - Florentino Hernando-Trancho
- Department of Thoracic Surgery, Hospital Clínico San Carlos, Calle del Profesor Martín Lagos, s/n, Madrid 28040, Spain
| | - Felipe Couñago
- Department of Radiation Oncology, Hospital Universitario Quirónsalud Madrid, Madrid 28223, Spain.,Department of Radiation Oncology, Hospital La Luz, Madrid 28003, Spain.,Medicine Department, School of Biomedical Sciences, Universidad Europea de Madrid, Villaviciosa de Odón 28670, Spain
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3
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PI3K/mTOR Dual Inhibitor PF-04691502 Is a Schedule-Dependent Radiosensitizer for Gastroenteropancreatic Neuroendocrine Tumors. Cells 2021; 10:cells10051261. [PMID: 34065268 PMCID: PMC8160730 DOI: 10.3390/cells10051261] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 05/12/2021] [Accepted: 05/14/2021] [Indexed: 12/27/2022] Open
Abstract
Patients with advanced-stage gastroenteropancreatic neuroendocrine tumors (GEP-NETs) have a poor overall prognosis despite chemotherapy and radiotherapy (e.g., peptide receptor radionuclide therapy (PRRT)). Better treatment options are needed to improve disease regression and patient survival. The purpose of this study was to examine a new treatment strategy by combining PI3K/mTOR dual inhibition and radiotherapy. First, we assessed the efficacy of two PI3K/mTOR dual inhibitors, PF-04691502 and PKI-402, to inhibit pAkt and increase apoptosis in NET cell lines (BON and QGP-1) and patient-derived tumor spheroids as single agents or combined with radiotherapy (XRT). Treatment with PF-04691502 decreased pAkt (Ser473) expression for up to 72 h compared with the control; in contrast, decreased pAkt expression was noted for less than 24 h with PKI-402. Simultaneous treatment with PF-04691502 and XRT did not induce apoptosis in NET cells; however, the addition of PF-04691502 48 h after XRT significantly increased apoptosis compared to PF-04691502 or XRT treatment alone. Our results demonstrate that schedule-dependent administration of a PI3K/mTOR inhibitor, combined with XRT, can enhance cytotoxicity by promoting the radiosensitivity of NET cells. Moreover, our findings suggest that radiotherapy, in combination with timed PI3K/mTOR inhibition, may be a promising therapeutic regimen for patients with GEP-NET.
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4
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Zhuang H. Research progress on the impact of radiation on TKI resistance mechanisms in NSCLC. J Cancer 2018; 9:3797-3801. [PMID: 30405851 PMCID: PMC6216000 DOI: 10.7150/jca.26364] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 07/23/2018] [Indexed: 11/21/2022] Open
Abstract
Resistance to tyrosine kinase inhibitor (TKI) therapy is often accompanied by various genetic alterations, and radiation is an important weapon for changing the DNA of tumor cells. In radiotherapy combined with TKI therapy for non-small cell lung cancer (NSCLC), the two treatment strategies affect and interact with each other, resulting in complex tumor resistance mechanisms. Accordingly, tumor progression management after radiotherapy combined with TKI therapy should be different from that after TKI therapy alone. However, current clinical practice is entirely based on the resistance mechanisms of simple TKI therapy. Therefore, it is imperative to investigate the impact of radiation on the mechanism of TKI resistance. However, due to the complexity of the resistance mechanisms under the combined effect of both therapies, such studies remain extremely challenging and time-consuming.
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Affiliation(s)
- Hongqing Zhuang
- Department of Radiation Oncology, Peking University Third Hospital, Beijing, China
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5
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Chen GZ, Dai WS, Zhu HC, Song HM, Yang X, Wang YD, Min H, Lu Q, Liu S, Sun XC, Zeng XN. Foretinib Enhances the Radiosensitivity in Esophageal Squamous Cell Carcinoma by Inhibiting Phosphorylation of c-Met. J Cancer 2017; 8:983-992. [PMID: 28529610 PMCID: PMC5436250 DOI: 10.7150/jca.18135] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Accepted: 12/23/2016] [Indexed: 12/13/2022] Open
Abstract
As a crucial event involved in the metastasis and relapse of esophageal cancer, c-Met overexpression has been considered as one of the culprits responsible for the failure in patients who received radiochemotherapy. Since c-Met has been confirmed to be pivotal for cell survival, proliferation and migration, little is known about its impact on the regulation of radiosensitivity in esophageal cancer. The present study investigated the radiosensitization effects of c-Met inhibitor foretinib in ECA-109 and TE-13 cell lines. Foretinib inhibited c-Met signaling in a dose-dependent manner resulting in decreases in the cell viability of ECA-109 and TE-13. Pretreatment with foretinib synergistically prompted cell apoptosis and G2/M arrest induced by irradiation. Moreover, decreases ability of DNA damage repair was also observed. In vivo studies confirmed that the combinatorial use of foretinib with irradiation significantly diminishes tumor burden compared to either treatment alone. The present findings implied a crucial role of c-Met in the modulation of radiosensitization in esophageal cancer, and foretinib increased the radiosensitivity in ECA-109 and TE-13 cells mainly via c-Met signaling, highlighting a novel profile of foretinib as a potential radiosensitizer for the treatment of esophageal cancer.
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Affiliation(s)
- Guang-Zong Chen
- Department of Radiation Oncology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Wang-Shu Dai
- Department of Radiation Oncology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Hong-Cheng Zhu
- Department of Radiation Oncology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Hong-Mei Song
- Department of Radiation Oncology, Lianyungang NO.2 People's Hospital Affiliated to Bengbu Medical College, Lianyungang 222000, China
| | - Xi Yang
- Department of Radiation Oncology, the Cancer Hospital of Fudan University, Shanghai 200000, China
| | - Yuan-Dong Wang
- Department of Radiation Oncology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Hua Min
- Department of Radiation Oncology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Qian Lu
- Department of Radiation Oncology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Shu Liu
- Department of Radiation Oncology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Xin-Chen Sun
- Department of Radiation Oncology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Xiao-Ning Zeng
- Department of Respiratory & Critical Care Medicine, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
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Jia Y, Dai G, Wang J, Gao X, Zhao Z, Duan Z, Gu B, Yang W, Wu J, Ju Y, Wang M, Li Z. c-MET inhibition enhances the response of the colorectal cancer cells to irradiation in vitro and in vivo. Oncol Lett 2016; 11:2879-2885. [PMID: 27073569 DOI: 10.3892/ol.2016.4303] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 01/05/2016] [Indexed: 12/19/2022] Open
Abstract
The aim of the present study was to investigate the effect of hepatocyte growth factor receptor (c-MET) inhibition on the viability of colon cancer cells and xenografts exposed to irradiation using short hairpin (sh)RNA or the c-MET inhibitor PHA665752. The underlying mechanisms were also investigated. Human colorectal adenocarcinoma HT-29 cells were infected with a lentivirus expressing shRNAs against c-MET and were irradiated at 0, 2, 4, 6 and 8 Gy. The viability of the cells was assessed by alamarBlue® assays. Mice bearing human colon carcinoma SW620 xenografts were randomly selected to receive 2.5% dimethyl sulfoxide (DMSO), 25 mg/kg PHA665752 intraperitoneally once every 2 days for 3 weeks, irradiation at 10 Gy, or 25 mg/kg PHA665752 intraperitoneally once every 2 days for 3 weeks followed 24 h later by irradiation at 10 Gy. The mean tumor volume (MTV) was measured. The apoptotic rate of cells was detected by terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) assays, and double stranded break marker antibody γ-H2AX and hypoxia inducible factor (HIF)-1α expression was examined by immunohistochemistry. alamarBlue assays revealed that c-MET downregulation by shRNA markedly accentuated the irradiation-induced reduction in the viability of HT-29 cells compared with HT-29 cells irradiated at the same doses (P<0.05). A combination of irradiation and PHA665752 caused an additional reduction in the MTV (382.8±42.4 mm3; P<0.01 vs. irradiation and PHA665752, 998.0±180.6 and 844.8±190.0 mm3, respectively). TUNEL assays revealed that irradiation and PHA665752 alone caused significant apoptosis of the SW620 cells in the tumor xenografts (P<0.01 vs. DMSO). The apoptotic index in the tumor xenografts of mice treated with a combination of irradiation and PHA665752 was significantly increased compared with mice treated with either agent alone (P<0.01). The combination of irradiation and PHA665752 was also associated with a marked increase in γ-H2AX levels and a significant decrease in HIF-1α expression in the xenografts (P<0.01). In conclusion, c-MET inhibition sensitizes colorectal cancer cells to irradiation by enhancing the formation of DNA double strand breaks and possibly alleviating tumor hypoxia.
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Affiliation(s)
- Yitao Jia
- Third Department of Oncology, Hebei General Hospital, Shijiazhuang, Hebei 050011, P.R. China
| | - Guangyao Dai
- Second Department of Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China; Department of Surgery, The First Hospital of Shijiazhuang, Shijiazhuang, Hebei 050011, P.R. China
| | - Jinxi Wang
- Fourth Department of General Surgery, The First Hospital of Handan, Handan, Hebei 056002, P.R. China
| | - Xing Gao
- Second Department of Abdominal Surgery, The First Affiliated Hospital of Xingtai Medical College, Xingtai, Hebei 054001, P.R. China
| | - Zhaolong Zhao
- Second Department of Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China
| | - Zhihui Duan
- Second Department of Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China
| | - Bin Gu
- Second Department of Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China
| | - Weiguang Yang
- Second Department of Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China
| | - Jianhua Wu
- Experimental Animal Center, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
| | - Yingchao Ju
- Experimental Animal Center, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
| | - Mingxia Wang
- Department of Pharmacy, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050011, P.R. China
| | - Zhongxin Li
- Second Department of Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China
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Provencio M, Sánchez A. Therapeutic integration of new molecule-targeted therapies with radiotherapy in lung cancer. Transl Lung Cancer Res 2015; 3:89-94. [PMID: 25806286 DOI: 10.3978/j.issn.2218-6751.2014.03.06] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Accepted: 03/30/2014] [Indexed: 01/30/2023]
Abstract
Lung cancer is the most common form of the disease and the leading cause of cancer deaths worldwide. Non-small-cell lung cancer (NSCLC) accounts for approximately 80-85% of all lung cancers. Forty percent of all cases present with stage III, and many of them are considered inoperable (staged IIIA with mediastinal lymph node involvement) or stage IIIB disease. Concurrent platinum-based chemotherapy and thoracic radiation has demonstrated survival benefits in these patients. We review the role of new target agents in combination with radiotherapy in stage III NSCLC. Antiangiogenics improve tumor oxygenation thereby improving the therapeutic efficacy of irradiation in models. Bevacizumab in combination with thoracic radiation has shown high toxicity. However, other antiangiogenic agents are more promising. Radiation activates epidermal growth factor receptor (EGFR) pathways, inducing radioresistance, cell proliferation and enhanced DNA repair. After promising data from preclinical models and early clinical trials, cetuximab did not show any benefit in a recent phase III trial. Panitumumab and nimotuzumab are under evaluation. Gefitinib has been investigated in combination with radiotherapy for unresectable stage III NSCLC, but results in maintenance treatment after chemoradiotherapy were not encouraging. Erlotinib has also been tested in a phase II trial with chemoradiotherapy. Other new pathways and agents are being studied, such as m-TOR pathway, bortezomib, heat shock protein 90 (Hsp90) inhibition, histone deacetylase inhibitors (HDACS), aurora kinases, mitogen activated protein kinases (MARK) and PARP inhibitors.
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Affiliation(s)
- Mariano Provencio
- Department of Medical Oncology of Puerta de Hierro Majadahonda, University Hospital, Madrid, Spain
| | - Antonio Sánchez
- Department of Medical Oncology of Puerta de Hierro Majadahonda, University Hospital, Madrid, Spain
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Zhuang HQ, Zhuang H, Bo Q, Guo Y, Wang J, Zhao LJ, Yuan ZY, Wang P. Experimental study on the regulation of erlotinib-induced radiosensitization with an anti-c-MET monoclonal antibody. Cancer Cell Int 2014; 14:109. [PMID: 25505849 PMCID: PMC4263203 DOI: 10.1186/s12935-014-0109-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 10/20/2014] [Indexed: 12/16/2022] Open
Abstract
PURPOSE Erlotinib is a novel therapeutic agent for cancer treatment. This study was performed to investigate the role of c-MET-PI3K-AKT pathway in the regulation of erlotinib-induced radiosensitization. METHODS A973 lung adenocarcinoma cells treated with 6 Gy of radiation were incubated in the presence of erlotinib. The apoptotic rate after 24 hours, the colony-formating rate after 14 days, and changes in the c-MET expression levels after 14 days of irradiation were examined. Surviving fractions in different treatment groups (blank control, radiation alone, erlotinib alone, anti-c-MET monoclonal antibody alone, combined erlotinib and radiation, and combined erlotinib and radiation with anti-c-MET monoclonal antibody groups) were determined, the survival curves were plotted, and the sensitizer enhancement ratio was calculated using colony formation assays. Expressions of c-MET, p-c-MET, PI3K, AKT, and p-AKT in cells in different treatment groups were examined by Western blot analysis. RESULTS The apoptotic rate in the combined erlotinib and radiation group was higher than those in single treatment groups; however, the colony-forming rate remained approximately 2.04 ± 1.02%. The expression of c-MET in colony-forming cells in the combined group significantly increased, and the blockade of c-MET activity significantly enhanced the radiosensitizing effect of erlotinib. The expression of c-Met, p-c-MET, PI3K, AKT, and p-AKT among colony-forming cells significantly decreased upon the inhibition of c-MET. CONCLUSIONS Upregulated activity of the c-MET-PI3K-AKT pathway was found to be important for cell survival under combined the treatment with erlotinib and radiation. The blockade of the c-MET-PI3K-AKT signaling pathway enhanced the radiosensitizing effect of erlotinib.
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Affiliation(s)
- Hong-Qing Zhuang
- Department of Radiotherapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin, China.,Tianjin Lung Cancer Center, Tianjin, China
| | - Hongxia Zhuang
- Department of Hematology, Weifang People's Hospital, Weifang, Shandong province China
| | - Qifu Bo
- Department of Oncology, Affiliated Hospital of Weifang Medical University, Weifang, Shandong province China
| | - Yihang Guo
- Department of Radiotherapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin, China.,Tianjin Lung Cancer Center, Tianjin, China
| | - Jun Wang
- Department of Radiotherapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin, China.,Tianjin Lung Cancer Center, Tianjin, China
| | - Lu-Jun Zhao
- Department of Radiotherapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin, China.,Tianjin Lung Cancer Center, Tianjin, China
| | - Zhi-Yong Yuan
- Department of Radiotherapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin, China.,Tianjin Lung Cancer Center, Tianjin, China
| | - Ping Wang
- Department of Radiotherapy, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin, China.,Tianjin Lung Cancer Center, Tianjin, China
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9
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miR-210 over-expression enhances mesenchymal stem cell survival in an oxidative stress environment through antioxidation and c-Met pathway activation. SCIENCE CHINA-LIFE SCIENCES 2014; 57:989-97. [PMID: 25168379 DOI: 10.1007/s11427-014-4725-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 04/19/2014] [Indexed: 01/18/2023]
Abstract
microRNA-210 (miR-210) has generally been reported to be associated with cell survival under hypoxia. However, there are few data regarding the role of miR-210 in the survival of mesenchymal stem cells (MSCs) under oxidative stress conditions. Thus, we sought to investigate whether miR-210 over-expression could protect MSCs against oxidative stress injury and what the primary mechanisms involved are. The results showed that over-expression of miR-210 significantly reduced the apoptosis of MSCs under oxidative stress, accompanied by obvious increases in cell viability and superoxide dismutase activity and remarkable decreases in malonaldehyde content and reactive oxygen species production, resulting in a noticeable reduction of apoptotic indices when compared with the control. Moreover, the above beneficial effects of miR-210 could be significantly reduced by c-Met pathway repression. Collectively, these results showed that miR-210 over-expression improved MSC survival under oxidative stress through antioxidation and c-Met pathway activation, indicating the potential development of a novel approach to enhance the efficacy of MSC-based therapy for injured myocardium.
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