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Hypoxia-induced tumor exosomes promote M2-like macrophage polarization of infiltrating myeloid cells and microRNA-mediated metabolic shift. Oncogene 2019; 38:5158-5173. [PMID: 30872795 DOI: 10.1038/s41388-019-0782-x] [Citation(s) in RCA: 200] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 02/08/2019] [Accepted: 03/04/2019] [Indexed: 12/12/2022]
Abstract
Developing tumors rapidly outgrow their oxygen supply and are subject to hypoxia, which stimulates hypersecretion of tumor-derived exosomes that promote angiogenesis, metastasis, and immunosuppression, but the molecular mediators of these pathological effects remain poorly defined. Using quantitative proteomics, we identified that exosomes produced by hypoxic tumor cells are highly enriched in immunomodulatory proteins and chemokines including CSF-1, CCL2, FTH, FTL, and TGFβ. Modeling exosome effects on tumor-infiltrating immune cells, we observed a potent ability of these hypoxia-induced vesicles to influence macrophage recruitment and promote M2-like polarization both in vitro and in vivo. In addition, hypoxic, but not normoxic, tumor exosomes enhanced oxidative phosphorylation in bone marrow-derived macrophages via transfer of let-7a miRNA, resulting in suppression of the insulin-Akt-mTOR signaling pathway. Together, these data demonstrate that hypoxia promotes tumor secretion of biomolecule-loaded exosomes that can modify the immunometabolic profile of infiltrating monocyte-macrophages to better evade host immunity and enhance tumor progression.
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Zhou S, Min Z, Sun K, Qu S, Zhou J, Duan H, Liu H, Liu X, Gong Z, Li D. miR‑199a‑3p/Sp1/LDHA axis controls aerobic glycolysis in testicular tumor cells. Int J Mol Med 2018; 42:2163-2174. [PMID: 30015851 DOI: 10.3892/ijmm.2018.3771] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 06/28/2018] [Indexed: 11/06/2022] Open
Abstract
Aerobic glycolysis is one of the characteristics of tumor metabolism and contributes to the development of tumors. Studies have identified that microRNA (miRNA/miR) serves an important role in glucose metabolism of tumors. miR‑199a‑3p is a member of the miR‑199a family that controls the outcomes of cell survival and death processes, and previous studies have indicated that the expression of miR‑199a‑3p is low and may be an inhibitor in several cancer types, including testicular tumors. The present study discussed the role and underlying mechanism of miR‑199a‑3p in aerobic glycolysis of Ntera‑2 cells and identified its downstream factors. Firstly, miR‑199a‑3p exhibited an inhibitory effect on lactic acid production, glucose intake, and reactive oxygen species (ROS) and adenosine 5'‑triphosphate (ATP) levels in Ntera‑2 cells. Then, using bioinformatics, recombinant construction and a dual luciferase reporter gene system, transcription factor Specificity protein 1 (Sp1) was determined as the direct target of miR‑199a‑3p. Also, downregulation of Sp1 by RNA interference decreased lactic acid production, glucose intake, and ROS and ATP levels in Ntera‑2 cells. Subsequently, through a functional rescue experiment, it was identified that the overexpression of Sp1 may abate the inhibition of miR‑199a‑3p on glucose metabolism, with the exception of ATP level, suggesting a reciprocal association between Sp1 and miR‑199a‑3p. Finally, it was determined that miR‑199a‑3p overexpression and Sp1 knockdown decreased lactate dehydrogenase A (LDHA) protein expression, which indicated that LDHA is a downstream target of the miR‑199a‑3p/Sp1 signaling pathway. To additionally verify the regulation of LDHA expression by 199a‑3p/Sp1, a LDHA promoter reporter plasmid was generated and the high activity of the promoter, which contained 3 potential Sp1 binding elements, was confirmed. In addition, the overexpression of Sp1 led to the increased activity of the LDHA promoter, whereas knockdown of Sp1 exhibited the opposite effect. Therefore, the results of the present study demonstrated that miR‑199a‑3p can inhibit LDHA expression by downregulating Sp1, and provided mechanistic evidence supporting the existence of a novel miR‑199a‑3p/Sp1/LDHA axis and its critical contribution to aerobic glycolysis in testicular cancer cells.
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Affiliation(s)
- Shihua Zhou
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
| | - Ziqian Min
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
| | - Kang Sun
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
| | - Sijie Qu
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
| | - Jinrun Zhou
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
| | - Hongyan Duan
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
| | - Huawei Liu
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
| | - Xiaowen Liu
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
| | - Zhijun Gong
- Department of Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Dan Li
- Department of Life Science, College of Biology, Hunan University, Changsha, Hunan 410082, P.R. China
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Liu H, Liu N, Cheng Y, Jin W, Zhang P, Wang X, Yang H, Xu X, Wang Z, Tu Y. Hexokinase 2 (HK2), the tumor promoter in glioma, is downregulated by miR-218/Bmi1 pathway. PLoS One 2017; 12:e0189353. [PMID: 29220380 PMCID: PMC5722312 DOI: 10.1371/journal.pone.0189353] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 11/27/2017] [Indexed: 11/18/2022] Open
Abstract
In cancer, glycolysis driving enzymes and their regulating microRNAs are one of the key focus of oncology research lately. The glycolytic enzyme hexokinase 2 (HK2) is crucial for the Warburg effect in human glioma, the most common malignant brain tumor. In the present study, we studied the tumorigenic role of HK2 in glioma, and clarified the mechanism of miR-218 induced HK2 regulation in glioma development. The HK2 expression in patient derived glioma and non neoplastic brain tissue was quantified. The HK2 silenced U87 and U251 cell lines were assessed for their proliferation, migration and invasive potential in vitro, while the tumor forming potential of U87 cells was evaluated in vivo. The untreated cell lines served as control. The HK2 expression in (a) lentivirus-infected, miR-218 overexpressing and (b) shRNA mediated Bmi1 silenced U87 and U251 glioma cell lines were quantified. Luciferase reporter assay, qRT-PCR analysis and WB were employed as required. The HK2 expression was significantly increased in glioma tissues comparing with the non neoplastic brain tissues and was positively correlated with the glioma grade. Silencing HK2 in glioma cell lines significantly decreased their proliferation, migration, invasion and tumorigenic abilities. Although, overexpression of miR-218 significantly downregulated the HK2 expression, luciferase reporter assay failed to show HK2 as the direct target of miR-218. A direct correlation, however, was observed between HK2 and Bmi-1, the direct target of miR-218. Taken together, our findings confirmed the tumorigenic activity of HK2 in glioma, and the involvement of the miR218/Bmi1 pathway in the regulation of its expression.
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Affiliation(s)
- Hui Liu
- Department of Experimental Surgery, Tangdu Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Nan Liu
- Department of Experimental Surgery, Tangdu Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Yingduan Cheng
- Department of Experimental Surgery, Tangdu Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
- Department of Research, Cipher Ground, North Brunswick, New Jersey, United States of America
| | - Weilin Jin
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Minhang, Shanghai, China
- Department of Bio-Nano-Science and Engineering, Institute of Micro-Nano Science and Technology, Shanghai Jiao Tong University, Minhang, Shanghai, China
| | - Pengxing Zhang
- Department of Experimental Surgery, Tangdu Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Xin Wang
- Department of Neurosurgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Hongwei Yang
- Department of Neurosurgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Xiaoshan Xu
- Department of Experimental Surgery, Tangdu Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Zhen Wang
- Department of Experimental Surgery, Tangdu Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Yanyang Tu
- Department of Experimental Surgery, Tangdu Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
- * E-mail:
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Wu D, Nie X, Ma C, Liu X, Liang X, An Y, Zhao B, Wu X. RSF1 functions as an oncogene in osteosarcoma and is regulated by XIST/miR-193a-3p axis. Biomed Pharmacother 2017; 95:207-214. [PMID: 28843909 DOI: 10.1016/j.biopha.2017.08.068] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 08/11/2017] [Accepted: 08/14/2017] [Indexed: 01/12/2023] Open
Abstract
RSF1 (HBXAP), is a member of ATP-dependent chromatin remodeling factor. Dysregulated RSF1 has been reported to be related to tumor progression. However, the function of RSF1 in osteosarcoma (OS) remains unclear. In this study, we showed that RSF1 expression was upregulated in OS cells. RSF1 inhibition suppressed OS cell proliferation and invasion. We further showed that MAPK/Erk signaling pathway was inactivated by RSF1 suppression. In addition, RSF1 was identified as a direct target of miR-193a-3p. Clinically, RSF1 was increased and associated with advanced clinical features and poor overall survival of OS patients. MiR-193a-3p expression was decreased and associated with advanced clinical features and poor overall survival of OS patients. In addition, we found that miR-193a-3p was negatively correlated with RSF1 expression in OS tissues. Moreover, our data showed that XIST could function as competing endogenous RNA to repress miR-193a-3p, which regulated its downstream target RSF1. In conclusion, our findings demonstrated that the XIST/miR-193a-3p/RSF1 axis might contribute to the progression and act as a therapeutic target of OS patients.
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Affiliation(s)
- Dapeng Wu
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China; Department of Orthopedics, The First Affiliated Hospital of Xinxiang Medical University, Weihui 453100, Henan, China
| | - Xingguo Nie
- Department of Orthopedics, The First Affiliated Hospital of Xinxiang Medical University, Weihui 453100, Henan, China
| | - Chao Ma
- Department of Orthopedics, The First Affiliated Hospital of Xinxiang Medical University, Weihui 453100, Henan, China
| | - Xianghua Liu
- Department of Orthopedics, The First Affiliated Hospital of Xinxiang Medical University, Weihui 453100, Henan, China
| | - Xue Liang
- Central Sterile Supply Department, The First Affiliated Hospital of Xinxiang Medical University, Weihui 453100, Henan, China
| | - Yongbo An
- Department of Orthopedics, The First Affiliated Hospital of Xinxiang Medical University, Weihui 453100, Henan, China
| | - Bin Zhao
- Department of Orthopedics, The First Affiliated Hospital of Xinxiang Medical University, Weihui 453100, Henan, China
| | - Xuejian Wu
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China.
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Xie R, Wu SN, Gao CC, Yang XZ, Wang HG, Zhang JL, Yan W, Ma TH. MicroRNA-30d inhibits the migration and invasion of human esophageal squamous cell carcinoma cells via the post‑transcriptional regulation of enhancer of zeste homolog 2. Oncol Rep 2017; 37:1682-1690. [PMID: 28184915 DOI: 10.3892/or.2017.5405] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 09/06/2016] [Indexed: 11/09/2022] Open
Abstract
The present study was carried out to investigate the expression pattern, clinical significance and biological functions of microRNA-30d (miR-30d) in esophageal carcinogenesis. Quantitative real-time PCR was performed to detect the expression levels of miR-30d in esophageal squamous cell carcinoma (ESCC) tissues and cell lines. Then, associations between miR-30d expression and various clinicopathological features of patients with ESCC were statistically evaluated. In addition, the effects of miR-30d on the migration and invasion of two human ESCC cell lines transfected with miRNA or co-transfected with miRNA mimics and the expression vector of its target gene were determined. The results revealed that the expression levels of miR-30d were markedly decreased in ESCC tissues and cell lines, comparing with the corresponding normal controls. Notably, reduced expression of miR-30d occurred more frequently in ESCC patients with positive lymph node metastasis, moderate-poor differentiation and advanced tumor-node-metastasis stage than those with negative features. Functionally, enforced expression of miR-30d was found to inhibit cell invasion and migration of the ESCC cell lines. Luciferase reporter assay identified enhancer of zeste homolog 2 (EZH2) as a direct target gene of miR-30d. The expression level of EZH2 mRNA was negatively correlated with the expression of miR-30d in the ESCC tissues. Moreover, the inhibitory effect of miR-30d on ESCC cell motility was reversed by EZH2 overexpression. Collectively, these findings provide convincing evidence that decreased expression of miR-30d may be implicated in esophageal carcinogenesis and progression. We also confirmed miR-30d as a tumor-suppressor which may inhibit cancer cell motility by targeting EZH2, a potential therapeutic target for ESCC.
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Affiliation(s)
- Rui Xie
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Shang-Nong Wu
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Cheng-Cheng Gao
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Xiao-Zhong Yang
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Hong-Gang Wang
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Jia-Ling Zhang
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Wei Yan
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Tian-Heng Ma
- Department of Gastroenterology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
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