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Shi L, Zhu W, Huang Y, Zhuo L, Wang S, Chen S, Zhang B, Ke B. Cancer-associated fibroblast-derived exosomal microRNA-20a suppresses the PTEN/PI3K-AKT pathway to promote the progression and chemoresistance of non-small cell lung cancer. Clin Transl Med 2022; 12:e989. [PMID: 35857905 PMCID: PMC9299573 DOI: 10.1002/ctm2.989] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 07/02/2022] [Accepted: 07/07/2022] [Indexed: 12/19/2022] Open
Abstract
Background Cancer‐associated fibroblasts (CAFs) contributes to overall tumor progression. In the current survey, we explored the ability of microRNA‐20a (miR‐20a) within these CAF‐derived exosomes to influence non‐small‐cell lung cancer (NSCLC) progression. Materials and methods Normal tissue‐associated fibroblasts (NAFs) and CAFs were collected from samples of NSCLC patient tumors and paracancerous lung tissues. Exosomes derived from these cells were then characterized via Western blotting, nanoparticle tracking analyses, and transmission electron microscopy. The expression of miR‐20a was assessed via qPCR and fluorescence in situ hybridization (FISH). CCK‐8, EdU uptake, and colony formation assessments were used for evaluating tumor proliferation, while Hoechst staining was performed to monitor the in vitro apoptotic death of tumor cells. A model of xenograft tumor established in nude mice was also used to evaluate in vivo tumor responses. Results CAF‐derived exosomes exhibited miR‐20a upregulation and promoted NSCLC cell proliferation and resistance to cisplatin (DDP). Mechanistically, CAF‐derived exosomes were discovered to transmit miR‐20a to tumor cells wherein it was able to target PTEN to enhance DDP resistance and proliferation. Associated PTEN downregulation following exosome‐derived miR‐20a treatment enhanced PI3K/AKT pathway activation. Conclusion The achieved outcomes explain that CAFs can release miR‐20a‐containing exosomes capable of promoting NSCLC progression and chemoresistance, highlighting this pathway as a possible therapeutic target in NSCLC.
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Affiliation(s)
- Lin Shi
- Department of Traditional Chinese Medicine, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Weiliang Zhu
- Department of Cancer Center, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Yuanyuan Huang
- Department of VIP Region, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Lin Zhuo
- Department of Traditional Chinese Medicine, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Siyun Wang
- Department of Traditional Chinese Medicine, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Shaobing Chen
- Department of Traditional Chinese Medicine, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Bei Zhang
- Department of VIP Region, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Bin Ke
- Department of VIP Region, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
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2
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Zhang Q, Deng X, Tang X, You Y, Mei M, Liu D, Gui L, Cai Y, Xin X, He X, Huang J. MicroRNA-20a Suppresses Tumor Proliferation and Metastasis in Hepatocellular Carcinoma by Directly Targeting EZH1. Front Oncol 2022; 11:737986. [PMID: 34976797 PMCID: PMC8716374 DOI: 10.3389/fonc.2021.737986] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 10/12/2021] [Indexed: 12/11/2022] Open
Abstract
Purpose Hepatocellular carcinoma (HCC), a worldwide leading cause of morbidity and mortality, is the most frequent primary liver tumor. Most HCC patients are diagnosed with advanced liver cancer, resulting in a very low 5-year survival rate. Thus, there is an urgent need for the development of targeted therapies. In this study, we aimed to investigate the effect and mechanism of the miR-20a/EZH1 axis on the proliferation and metastasis of HCC and the inhibitory effect of the EZH1/EZH2 inhibitor UNC1999 on HCC. Materials and Methods The expression of miR-20a in human HCC tissues and cell lines was detected using quantitative real-time PCR (qRT-PCR). The expressions of proteins were analyzed with immunohistochemistry and Western blotting. Luciferase assay was used to verify whether miR-20a targets EZH1 or EZH2. The effect of miR-20a on HCC progression was studied in vivo and in vitro. The tumor inhibitory effect of UNC1999 was confirmed in vivo. CCK8 assay, wound healing assay, cell migration and invasion assay were used to evaluate the synergistic effect of UNC1999 with sorafenib. RNA sequencing (RNA-seq) was performed to screen the differentially expressed genes in the Huh7 and SMMC7721 cell lines after UNC1999, sorafenib, and combination treatments. Results In this study, miR-20a showed a lower expression in both HCC tissues and cell lines. MiR-20a inhibited the proliferation and migration of SMMC7721 and Huh7 cells. The results of the luciferase assay and Western blot analysis revealed that miR-20a directly targeted EZH1, a histone methyltransferase. We demonstrated that miR-20a negatively regulated the expression of EZH1 and inhibited the proliferation and metastasis of HCC by reducing H3K27 methylation. We found UNC1999 inhibited tumor cells proliferation and enhanced the inhibitory effect of sorafenib. Conclusion We demonstrated that miR-20a suppresses the tumor proliferation and metastasis in HCC by directly targeting EZH1. UNC1999 can inhibit tumor proliferation in vivo and increase the sensitivity of hepatoma cell lines to sorafenib.
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Affiliation(s)
- Qianqian Zhang
- Guangdong Provincial Key Laboratory of Biomedical Imaging and Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, China
| | - Xiaohong Deng
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiuxin Tang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Ying You
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Meihua Mei
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Danping Liu
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Lian Gui
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yan Cai
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiaoping Xin
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiaoshun He
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Junqi Huang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial International Cooperation Base of Science and Technology (Organ Transplantation), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Laboratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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3
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Kong XH, Shi SF, Hu HJ, Wang JX. MicroRNA-20a suppresses RANKL-modulated osteoclastogenesis and prevents bone erosion in mice with rheumatoid arthritis through the TLR4/p38 pathway. J BIOL REG HOMEOS AG 2021; 35:921-931. [PMID: 34212684 DOI: 10.23812/20-604-a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abnormal osteoclast formation plays a significant part in rheumatoid arthritis (RA). As potent therapeutic biomarkers, microRNAs (miRNAs) have obtained increasing attention. Recently, treatment regimens regarding miRNAs have been implicated in skeletal diseases. The aim of this study is to assess the expression and function of miR-20a during osteoclast proliferation and differentiation and its correlation with bone erosion in RA mice. The expression of miR-20a was observed to be diminished in the ankle tissues of RA mice relative to that in normal controls evaluated by RT-qPCR. Hematoxylin and eosin staining, Safranin O-fast green staining, and tartrateresistant acid phosphatase staining were used to evaluate the effects of miR-20a on RA symptoms. The proliferation and differentiation of osteoclasts, and bone erosion were repressed by agomiR-20a injection. 3'UTR luciferase reporter assays were conducted to validate the putative binding between miR-20a and receptor activation of nuclear factor-κB ligand (RANKL). The protein expression and phosphorylation level of toll-like receptor4 (TLR4)/p38 pathway-related factors were detected by Western blot. miR-20a inhibited proliferation and differentiation potentials to osteoclasts partly through the TLR4/p38 pathway. The current work provides evidence that miR-20a hinders proliferation and differentiation of osteoclasts by targeting RANKL through the TLR4/p38 pathway.
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Affiliation(s)
- X H Kong
- Department of Rheumatism, Linyi Central Hospital, Linyi, Shandong, P.R. China
| | - S F Shi
- Department of Rheumatism, Linyi Central Hospital, Linyi, Shandong, P.R. China
| | - H J Hu
- Department of Rheumatism, Linyi Central Hospital, Linyi, Shandong, P.R. China
| | - J X Wang
- Department of Rheumatism, Linyi Central Hospital, Linyi, Shandong, P.R. China
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4
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Wan K, Tu Z, Liu Z, Cai Y, Chen Y, Ling C. Upregulated osteoprotegerin expression promotes lung cancer cell invasion by increasing miR-20a expression. Exp Ther Med 2021; 22:846. [PMID: 34149892 PMCID: PMC8210324 DOI: 10.3892/etm.2021.10278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 04/06/2021] [Indexed: 12/20/2022] Open
Abstract
Osteoprotegerin (OPG) is a member of the tumor necrosis factor receptor superfamily and a major regulatory factor in osteoclast development. OPG has been previously associated with the malignant behavior of various types of cancer, particularly that of cancer metastasis. However, information on the link between the expression profile of OPG and lung cancer metastasis remained elusive. In the present study, the expression levels of OPG in the serum samples of patients with non-small cell lung cancer (NSCLC) was measured using ELISA. The expression of miRNAs was assessed using reverse transcription-quantitative PCR. A549 or H3122 cell invasion was assessed using Transwell invasion assays. The effect of OPG on the invasiveness of lung cancer cells was evaluated using an experimental mouse lung metastasis model. OPG expression was found to be upregulated in the serum of patients with NSCLC compared with that in healthy individuals. The serum levels of OPG in patients with distant metastasis were observably higher compared with those in patients without metastasis. Functionally, overexpression of OPG in NSCLC cells markedly promoted cell invasion. Mechanistically, increased expression of OPG resulted in upregulation of microRNA (miR)-20a in NSCLC cells. Furthermore, miR-20a promoted NSCLC cell invasion, whilst miR-20a inhibition partially abrogated the effect of OPG on NSCLC cell invasion. Taken together, the present results demonstrated that the OPG/miR-20a axis serve an important role in lung cancer metastasis, which potentially provide an additional novel target for lung cancer treatment.
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Affiliation(s)
- Ke Wan
- Department of Respiratory Diseases, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215000, P.R. China.,Department of Thoracic Oncology, Jiangxi Cancer Hospital, Nanchang, Jiangxi 330029, P.R. China
| | - Ziwei Tu
- Department of Radiation Oncology, Jiangxi Cancer Hospital, Nanchang, Jiangxi 330029, P.R. China
| | - Zhentian Liu
- Department of Thoracic Oncology, Jiangxi Cancer Hospital, Nanchang, Jiangxi 330029, P.R. China
| | - Yun Cai
- Department of Thoracic Oncology, Jiangxi Cancer Hospital, Nanchang, Jiangxi 330029, P.R. China
| | - Yinglan Chen
- Department of Thoracic Oncology, Jiangxi Cancer Hospital, Nanchang, Jiangxi 330029, P.R. China
| | - Chunhua Ling
- Department of Respiratory Diseases, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215000, P.R. China
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5
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Zhong L, Yan J, Li H, Meng L. HDAC9 Silencing Exerts Neuroprotection Against Ischemic Brain Injury via miR-20a-Dependent Downregulation of NeuroD1. Front Cell Neurosci 2021; 14:544285. [PMID: 33584204 PMCID: PMC7873949 DOI: 10.3389/fncel.2020.544285] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 11/25/2020] [Indexed: 12/17/2022] Open
Abstract
Cerebral stroke is an acute cerebrovascular disease that is a leading cause of death and disability worldwide. Stroke includes ischemic stroke and hemorrhagic strokes, of which the incidence of ischemic stroke accounts for 60–70% of the total number of strokes. Existing preclinical evidence suggests that inhibitors of histone deacetylases (HDACs) are a promising therapeutic intervention for stroke. In this study, the purpose was to investigate the possible effect of HDAC9 on ischemic brain injury, with the underlying mechanism related to microRNA-20a (miR-20a)/neurogenic differentiation 1 (NeuroD1) explored. The expression of HDAC9 was first detected in the constructed middle cerebral artery occlusion (MCAO)-provoked mouse model and oxygen-glucose deprivation (OGD)-induced cell model. Next, primary neuronal apoptosis, expression of apoptosis-related factors (Bax, cleaved caspase3 and bcl-2), LDH leakage rate, as well as the release of inflammatory factors (TNF-α, IL-1β, and IL-6) were evaluated by assays of TUNEL, Western blot, and ELISA. The relationships among HDAC9, miR-20a, and NeuroD1 were validated by in silico analysis and ChIP assay. HDAC9 was highly-expressed in MCAO mice and OGD-stimulated cells. Silencing of HDAC9 inhibited neuronal apoptosis and inflammatory factor release in vitro. HDAC9 downregulated miR-20a by enriching in its promoter region, while silencing of HDCA9 promoted miR-20a expression. miR-20a targeted Neurod1 and down-regulated its expression. Silencing of HDAC9 diminished OGD-induced neuronal apoptosis and inflammatory factor release in vitro as well as ischemic brain injury in vivo by regulating the miR-20a/NeuroD1 signaling. Overall, our study revealed that HDAC9 silencing could retard ischemic brain injury through the miR-20a/Neurod1 signaling.
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Affiliation(s)
- Liangjun Zhong
- Department of Neurosurgery, Pingyin County People's Hospital, Jinan, China
| | - Jinxiang Yan
- Department of Neurosurgery, Ningyang No. 1 People's Hospital, Tai'an, China
| | - Haitao Li
- Department of Neurology, Qihe County People's Hospital, Dezhou, China
| | - Lei Meng
- Department of Neurosurgery, Shandong Provincial Hospital, Jinan, China
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Yang CC, Wei XP, Fu XM, Qian LT, Xie LJ, Liu HB, Li G, Li XG, Zeng XW. Down-regulating microRNA-20a regulates CDH1 to protect against cerebral ischemia/reperfusion injury in rats. Cell Cycle 2020; 20:54-64. [PMID: 33345691 DOI: 10.1080/15384101.2020.1856498] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Studies have extensively focused on the involvement of microRNAs (miRNAs) in cerebral ischemia/reperfusion (I/R) injury but not much on the specific role of miR-20a. Hence, this study is purposed to decipher whether miR-20a could regulate cadherin 1 (CDH1) to affect cerebral I/R injury in rats. Rat transient middle cerebral artery occlusion model (MCAO) was established. Rats were injected with lentiviral solution containing miR-20a inhibitor, or overexpressed CDH1 or combined depleted miR-20a and CDH1 to explore their roles in cerebral I/R injury. Oxidative stress-related factors, miR-20a, CDH1, nuclear factor-kappaB (NF-κB) and Nestin expression in brain tissues were detected by RT-qPCR and western blot assay. The target relation between miR-20a and CDH1 was predicted by online website and further confirmed by luciferase activity assay. In rats with cerebral I/R injury, increased miR-20a and decreased CDH1 were found in brain tissues. Reduction of miR-20a or elevation of CDH1 attenuated behavior function in MCAO rats. Inhibiting miR-20a or restoring CDH1 restrained oxidative stress, attenuated pathological damage of neurons, promoted neuron survival, and down-regulated NF-κB and Nestin expression in brain tissues of MCAO rats. CDH1 was determined to a target gene of miR-20a. This study elucidates that down-regulating miR-20a elevates CDH1 to protect neurons from cerebral I/R injury, which paves a new way for treatment of cerebral I/R injury.
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Affiliation(s)
- Chun-Chun Yang
- Department of Neurosurgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University , Jinan, Shandong, China.,School of Medicine, Shandong University , Jinan, Shandong, China.,Department of Neurosurgery, Fuyang People's Hospital , Fuyang, Anhui, China
| | - Xiang-Pin Wei
- Department of Neurosurgery, AnHui Provincial Hospital, Shandong University , Anhui, China
| | - Xian-Ming Fu
- Department of Neurosurgery, AnHui Provincial Hospital, Shandong University , Anhui, China
| | - Ling-Tao Qian
- Department of Neurosurgery, Fuyang People's Hospital , Fuyang, China
| | - Lan-Jun Xie
- Department of Neurosurgery, Fuyang People's Hospital , Fuyang, China
| | - Hong-Bo Liu
- Department of Stroke Center, Fuyang People's Hospital , Fuyang, China
| | - Gang Li
- Department of Neurosurgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University , Jinan, Shandong, China
| | - Xin-Gang Li
- Department of Neurosurgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University , Jinan, Shandong, China
| | - Xian-Wei Zeng
- Department of Neurosurgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University , Jinan, Shandong, China
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Pan Q, Gao Z, Zhu C, Peng Z, Song M, Li L. Overexpression of histone deacetylase SIRT1 exerts an antiangiogenic role in diabetic retinopathy via miR-20a elevation and YAP/HIF1α/VEGFA depletion. Am J Physiol Endocrinol Metab 2020; 319:E932-E943. [PMID: 32776826 DOI: 10.1152/ajpendo.00051.2020] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
As a basic member of the Class III histone deacetylases, SIRT1 has been implicated in the occurrence and progression of diabetic retinopathy (DR). The current study aimed to investigate the roles of SIRT1/miR-20a/Yse-associated protein (YAP)/hypoxia-inducible factor 1 α (HIF1α)/vascular endothelial growth factor A (VEGFA) in DR. The expression of SIRT1 was initially determined through quantitative RT-PCR and Western blot analysis following the successful establishment of a DR mouse model, followed by detection of SIRT1 catalytic activity. Retinal microvascular endothelial cells (RMECs) were cultured in media supplemented with normal glucose (NG) or high glucose (HG). Thereafter, SIRT1 was either silenced or overexpressed in RMECs, after which EdU staining and Matrigel-based tube formation assay were performed to assess cell proliferation and tube formation. The binding relationship between YAP, HIF1α, and VEGFA was further illustrated using dual-luciferase reporter assay. Preretinal neovascular cell number was tallied with the IB4-positive vascular endothelial cells, as determined by immunofluorescence. SIRT1 was poorly expressed in mice with DR and HG-treated RMECs with low catalytic activity. The proliferation and tube formation capabilities of RMECs were elevated under HG conditions, which could be reversed following overexpression of SIRT1. SIRT1 was identified as positively regulating the expression of miR-20a with YAP detected as the key target gene of miR-20a. Our data suggested that YAP could upregulate VEGFA via induction of HIF1α. Moreover, SIRT1 overexpression strongly repressed RMEC proliferation and angiogenesis, which could be reversed via restoration of YAP/HIF1α/VEGFA expression. Taken together, the key findings of our study suggest that upregulation of SIRT1 inhibits the development of DR via miR-20a-induced downregulation of YAP/HIF1α/VEGFA.
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Affiliation(s)
- Qintuo Pan
- Department of Fundus Surgery, The Eye Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China
| | - Zhiqiang Gao
- Department of Fundus Surgery, The Eye Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China
| | - Chenlei Zhu
- Department of Fundus Surgery, The Eye Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China
| | - Zijie Peng
- Department of Fundus Surgery, The Eye Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China
| | - Minmin Song
- Department of Fundus Surgery, The Eye Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China
| | - Lili Li
- Department of Radiation Oncology and Chemotherapy, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China
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8
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Peng Q, Zhao P, Shen Y, Cheng M, Wu Y, Zhu Y. Prognostic implication and functional exploration for microRNA-20a as a molecular biomarker of gastrointestinal cancer. BMC Cancer 2020; 20:420. [PMID: 32410584 PMCID: PMC7227208 DOI: 10.1186/s12885-020-06875-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 04/16/2020] [Indexed: 02/07/2023] Open
Abstract
Background It is generally accepted that microRNA-20a (miR-20a) is aberrantly expressed in gastrointestinal cancer (GIC), and may be associated with the prognosis of GIC patients. Nevertheless, the clinical prognostic value of miR-20a expression in GIC remains controversial. Methods We first conducted a comprehensive literature search of the clinical data and pooled them for evidence in assessing prognostic significance of miR-20a expression in GIC. Afterwards, we applied some bioinformatic analysis methods to explore the biological function of miR-20a and explain why miR-20a could act as an effective biomarker. Results The pooled results showed that enhanced miR-20a expression was significantly associated with poor survival in GIC patients (HR: 1.36; 95%CI: 1.21–1.52; P < 0.001). According to the subgroup analysis, the ethnicity, cancer type, sample source, and sample size may have an impact on the predictive roles for miR-20a. The gene ontologies enriched by the predicted miR-20a targets were highly associated with some important biological processes, cell components and molecular functions. Moreover, a series of prominent pathways linked with GIC carcinogenesis were identified. Ultimately, the crucial targets and modules were identified by constructing the protein-protein interaction network of miR-20a targets, which were highly associated with the initiation and progression of GIC according to previous molecular biology experiments. Conclusions Our results indicated that high expression of miR-20a may be a credible indicator of worse prognosis in GIC. Further studies involving biological experiments and larger sample sizes should be performed to validate these findings.
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Affiliation(s)
- Qiliang Peng
- Department of Radiotherapy & Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Radiotherapy & Oncology, Soochow University, Suzhou, China
| | - Peifeng Zhao
- Department of Radiotherapy & Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Radiotherapy & Oncology, Soochow University, Suzhou, China
| | - Yi Shen
- Department of Radiation Oncology, The Affiliated Suzhou Science & Technology Town Hospital of Nanjing Medical University, Suzhou, China
| | - Ming Cheng
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Yongyou Wu
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, China.
| | - Yaqun Zhu
- Department of Radiotherapy & Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China. .,Institute of Radiotherapy & Oncology, Soochow University, Suzhou, China.
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9
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Xiao Z, Chen S, Feng S, Li Y, Zou J, Ling H, Zeng Y, Zeng X. Function and mechanisms of microRNA-20a in colorectal cancer. Exp Ther Med 2020; 19:1605-1616. [PMID: 32104211 PMCID: PMC7027132 DOI: 10.3892/etm.2020.8432] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 10/29/2019] [Indexed: 02/07/2023] Open
Abstract
Colorectal cancer (CRC) is the third most common malignancy and the second leading cause of cancer-associated mortality worldwide. CRC currently has no specific biomarkers to promote its diagnosis and treatment and the underlying mechanisms regulating its pathogenesis have not yet been determined. MicroRNAs (miRs) are small, non-coding RNAs that exhibit regulatory functions and have been demonstrated to serve a crucial role in the post-transcriptional regulatory processes of gene expression that is associated with cell physiology and disease progression. Recently, abnormal miR-20a expression has been identified in a number of cancers types and this has become a novel focus within cancer research. High levels of miR-20a expression have been identified in CRC tissues, serum and plasma. In a recent study, miR-20a was indicated to be present in feces and to exhibit a high sensitivity to CRC. Therefore, miR-20a may be used as a marker for CRC and an indicator that can prevent the invasive examination of patients with this disease. Changes in the expression of miR-20a during chemotherapy can be used as a biomarker for monitoring resistance to treatment. In conclusion, miR-20a exhibits the potential for clinical application as a novel diagnostic biomarker and therapeutic target for use in patients with CRC. The present study focused on the role and mechanisms of miR-20a in CRC.
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Affiliation(s)
- Zheng Xiao
- Hunan Province Key Laboratory of Tumor Cellular and Molecular Pathology, Cancer Research Institute, University of South China, Hengyang, Hunan 421001, P.R. China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Shi Chen
- Hunan Province Key Laboratory of Tumor Cellular and Molecular Pathology, Cancer Research Institute, University of South China, Hengyang, Hunan 421001, P.R. China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Shujun Feng
- Hunan Province Key Laboratory of Tumor Cellular and Molecular Pathology, Cancer Research Institute, University of South China, Hengyang, Hunan 421001, P.R. China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Yukun Li
- Hunan Province Key Laboratory of Tumor Cellular and Molecular Pathology, Cancer Research Institute, University of South China, Hengyang, Hunan 421001, P.R. China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Juan Zou
- Hunan Province Key Laboratory of Tumor Cellular and Molecular Pathology, Cancer Research Institute, University of South China, Hengyang, Hunan 421001, P.R. China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Hui Ling
- Hunan Province Key Laboratory of Tumor Cellular and Molecular Pathology, Cancer Research Institute, University of South China, Hengyang, Hunan 421001, P.R. China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Ying Zeng
- Hunan Province Key Laboratory of Tumor Cellular and Molecular Pathology, Cancer Research Institute, University of South China, Hengyang, Hunan 421001, P.R. China.,School of Nursing, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Xi Zeng
- Hunan Province Key Laboratory of Tumor Cellular and Molecular Pathology, Cancer Research Institute, University of South China, Hengyang, Hunan 421001, P.R. China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, P.R. China
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10
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Mammadzada P, Bayle J, Gudmundsson J, Kvanta A, André H. Identification of Diagnostic and Prognostic microRNAs for Recurrent Vitreous Hemorrhage in Patients with Proliferative Diabetic Retinopathy. J Clin Med 2019; 8:jcm8122217. [PMID: 31847440 PMCID: PMC6947310 DOI: 10.3390/jcm8122217] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 12/12/2019] [Accepted: 12/14/2019] [Indexed: 02/06/2023] Open
Abstract
MicroRNAs (miRNAs) can provide insight into the pathophysiological states of ocular tissues such as proliferative diabetic retinopathy (PDR). In this study, differences in miRNA expression in vitreous from PDR patients with and without incidence of recurrent vitreous hemorrhage (RVH) after the initial pars-plana vitrectomy (PPV) were analyzed, with the aim of identifying biomarkers for RVH. Fifty-four consented vitreous samples were analyzed from patients undergoing PPV for PDR, of which eighteen samples underwent a second surgery due to RVH. Ten of the sixty-six expressed miRNAs (miRNAs-19a, -20a, -22, -27a, -29a, -93, -126, -128, -130a, and -150) displayed divergences between the PDR vitreous groups and to the control. A significant increase in the miRNA-19a and -27a expression was determined in PDR patients undergoing PPV as compared to the controls. miRNA-20a and -93 were significantly upregulated in primary PPV vitreous samples of patients afflicted with RVH. Moreover, this observed upregulation was not significant between the non-RVH and control group, thus emphasizing the association with RVH incidence. miRNA-19a and -27a were detected as putative vitreous biomarkers for PDR, and elevated levels of miRNA-20a and -93 in vitreous with RVH suggest their biomarker potential for major PDR complications such as recurrent hemorrhage incidence.
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Affiliation(s)
- Parviz Mammadzada
- Department of Clinical Neurosciences, Division of Eye and Vision, St. Erik Eye Hospital, Karolinska Institutet, Stockholm 11282, Sweden; (P.M.); (J.B.); (J.G.); (A.K.)
| | - Juliette Bayle
- Department of Clinical Neurosciences, Division of Eye and Vision, St. Erik Eye Hospital, Karolinska Institutet, Stockholm 11282, Sweden; (P.M.); (J.B.); (J.G.); (A.K.)
| | - Johann Gudmundsson
- Department of Clinical Neurosciences, Division of Eye and Vision, St. Erik Eye Hospital, Karolinska Institutet, Stockholm 11282, Sweden; (P.M.); (J.B.); (J.G.); (A.K.)
- Department of Ophthalmology, University of Iceland, Reykjavik 101, Iceland
| | - Anders Kvanta
- Department of Clinical Neurosciences, Division of Eye and Vision, St. Erik Eye Hospital, Karolinska Institutet, Stockholm 11282, Sweden; (P.M.); (J.B.); (J.G.); (A.K.)
| | - Helder André
- Department of Clinical Neurosciences, Division of Eye and Vision, St. Erik Eye Hospital, Karolinska Institutet, Stockholm 11282, Sweden; (P.M.); (J.B.); (J.G.); (A.K.)
- Correspondence:
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11
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Yang H, Li Y, Peng Z, Wang Y. Overexpression of miR-20a promotes the progression of osteosarcoma by directly targeting QKI2. Oncol Lett 2019; 18:87-94. [PMID: 31289476 PMCID: PMC6540454 DOI: 10.3892/ol.2019.10313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 01/22/2019] [Indexed: 11/15/2022] Open
Abstract
Osteosarcoma (OS) is the most common type of malignant primary bone neoplasm. Although the application of neoadjuvant chemotherapy has improved the 5-year survival rate of patients suffering from OS, prognosis remains poor. Therefore, it is important to elucidate the molecular mechanisms underlying the occurrence, progression and metastasis of OS. The RNA-binding protein Quaking (QKI) is a member of the STAR family of proteins, and can function as a tumor suppressor gene to suppress the occurrence and progression of a variety of tumors; however, the role of QKI in OS remains to be fully elucidated. In the present study, it was identified that the expression of QKI2 was downregulated in OS using western blot analysis. In addition, subsequent functional investigations, including MTT, Transwell invasion and migration assays, revealed that QKI2 inhibited the proliferation, invasion and migration of an OS cell line in vitro. By implementing a series of experimental techniques in molecular biology, including reverse transcription-quantitative polymerase chain reaction and a double fluorescence reporter assay, it was demonstrated that the expression of miR-20a was high and inhibited the expression of QKI2 in OS. In conclusion, it was revealed that aberrantly upregulated miR-20a inhibited the expression of QKI2 in OS by targeting QKI2 mRNA, subsequently promoting the proliferation, migration and invasion of OS cells.
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Affiliation(s)
- Hongbo Yang
- Department of Orthopedic Surgery, Affiliated Hospital of Chifeng University, Chifeng, Inner Mongolia 024000, P.R. China
| | - Yongli Li
- Department of Tumor Radiotherapy, Heilongjiang Provincial Hospital, Harbin, Heilongjiang 150000, P.R. China
| | - Zhibin Peng
- Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Yansong Wang
- Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
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12
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Wei L, Ran F. MicroRNA-20a promotes proliferation and invasion by directly targeting early growth response 2 in non-small cell lung carcinoma. Oncol Lett 2017; 15:271-277. [PMID: 29375712 PMCID: PMC5766075 DOI: 10.3892/ol.2017.7299] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 07/14/2017] [Indexed: 12/25/2022] Open
Abstract
MicroRNA-20a (miR-20a) serves a notable role in tumor development and progression; it functions differently in different types of malignant tumor, and its role and mechanism in non-small cell lung carcinoma (NSCLC) remains unclear. In the present study, the effects of miR-20a on the proliferation and invasion of NSCLC cells and the underlying mechanisms behind this were investigated. Reverse transcription-quantitative polymerase chain reaction revealed that the expression level of miR-20a was higher in human NSCLC than in normal tissues. Following this, the effect of miR-20a on the proliferation, apoptosis, migration and invasion of NSCLCA-549 cells was further evaluated. In vitro analysis, including a Cell Counting Kit-8, colony formation and Transwell migration assay, indicated that miR-20a-knockdown inhibited the proliferation, invasion and migration, while promoting the cell apoptosis of the A-549 cells. Early growth response 2 (EGR2) protein and mRNA levels were downregulated or upregulated following the overexpression or knockdown of miR-20a, respectively. Dual-luciferase reporter gene assays implied that EGR2 is a direct target gene of miR-20a. The results of the present study indicated that miR-20a may function as an oncomiR in the development of NSCLC by promoting cell viability and motility. The inhibition of miR-20a could even become a novel therapeutic method for the treatment of NSCLC.
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Affiliation(s)
- Lai Wei
- Department of Chest Radiotherapy, Hubei Cancer Hospital, Wuhan, Hubei 430079, P.R. China
| | - Fengming Ran
- First Department of Thoracic Surgery, Hubei Cancer Hospital, Wuhan, Hubei 430079, P.R. China
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13
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Liu Y, Han S, Li Y, Liu Y, Zhang D, Li Y, Zhang J. MicroRNA-20a contributes to cisplatin-resistance and migration of OVCAR3 ovarian cancer cell line. Oncol Lett 2017; 14:1780-1786. [PMID: 28789409 DOI: 10.3892/ol.2017.6348] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 03/03/2017] [Indexed: 12/17/2022] Open
Abstract
MicroRNAs (miRs) have been reported to be associated with the development of numerous types of cancer. However, the function of miRs in human ovarian carcinoma chemoresistance remains largely undefined. In the present study, cell chemotherapy combined with a Cell Counting Kit-8 assay demonstrated that miR-20a performed important roles in ovarian cancer cells chemoresistance. Flow cytometry, cellular proliferation assays and Transwell assays results revealed that the proliferation and migration rates of OVCAR3/DDP cells were increased in comparison with parental cells. Western blot analysis results suggested that epithelial-mesenchymal transition (EMT) activated by miR-20a contributed to OVCAR3/DDP cell migration. The present study highlighted the importance of miR-20a in regulating the chemoresistant properties of OVCAR3 cells and promoting cisplatin-resistant cell migration by activating EMT. The results of present study may therefore provide novel insights into reversing the chemoresistance of ovarian cancer and improving its treatment.
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Affiliation(s)
- Yankun Liu
- The Cancer Institute, Tangshan People's Hospital, Tangshan, Hebei 063001, P.R. China
| | - Sugui Han
- Department of Nuclear Medicine Clinical Laboratory, Tangshan People's Hospital, Tangshan, Hebei 063001, P.R. China
| | - Yuhui Li
- Department of Neurosurgery, Tangshan People's Hospital, Tangshan, Hebei 063001, P.R. China
| | - Yan Liu
- College of Life Sciences, North China University of Science and Technology, Tangshan, Hebei 063000, P.R. China
| | - Di Zhang
- The Cancer Institute, Tangshan People's Hospital, Tangshan, Hebei 063001, P.R. China
| | - Yufeng Li
- The Cancer Institute, Tangshan People's Hospital, Tangshan, Hebei 063001, P.R. China
| | - Jinghua Zhang
- The Cancer Institute, Tangshan People's Hospital, Tangshan, Hebei 063001, P.R. China
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14
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Zhou Y, He D, Zeng J, Bao S, Lai J, Weng Y, Chen S. The Effects of Antisense miRNA-20a Alone or in Combination with Imatinib on K562 Cell Proliferation. Front Pharmacol 2017; 8:127. [PMID: 28367122 PMCID: PMC5355440 DOI: 10.3389/fphar.2017.00127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 02/28/2017] [Indexed: 12/26/2022] Open
Abstract
Objective: The effects of microRNA-20a (miR-20a) antisense oligonucleotides (ASODNs) on the proliferation and apoptosis of K562 cells were investigated, and the effects of these ASODNs in combination with imatinib on K562 cells were preliminarily observed. Methods: miR-20a ASODNs and scrambled oligonucleotides (SODNs) were chemically synthesized, and the later was used as the control. miR-20a ASODNs were transfected into K562 cells using Lipofectamine 2000 transfection reagent, and the expression of miR-20a was detected using real-time quantitative RT-PCR (qRT-PCR). The CCK8 assay was performed to detect the inhibition of the cell growth rate. The cells were stained by Hoechst 33258 to detect apoptotic cell morphology. Annexin V/PI double staining was used to detect the cell apoptosis rate using flow cytometry. The protein expression levels of E2F1, P21, and Bim in the K562 cell line were detected using western blotting. Results: The qRT-PCR results showed that the expression level of miR-20a in K562 cells transfected with miR-20a ASODNs was lower than those in the normal control, SODN and blank transfection groups (p < 0.05). miR-20a ASODNs significantly inhibited the growth of K562 cells as compared to the controls (p < 0.05). The Hoechst staining results showed morphological changes, suggesting apoptosis. The cell apoptosis rates in the ASODN group was (13.9 ± 1.5)%, which was significantly higher than that in the normal control group (1.84 ± 0.21)%, blank transfection group (3.21 ± 0.32)%, and SODN group (3.72 ± 0.44)% (p < 0.05). The protein expression of E2F1 and P21 in K562 cells transfected with miR-20a ASODNs were higher, while the level of Bim protein was significantly lower than that in the control groups. When miR-20a ASODNs were combined with imatinib, the growth of K562 cells was significantly inhibited as compared to the ASODN treatment alone, imatinib alone, and SODN+imatinib groups (p < 0.05). Conclusions: miR-20a ASODNs could induce apoptosis and inhibit the proliferation of K562 cells. In addition, imatinib combined with miR-20a ASODNs can increase the inhibitory effect on K562 cell proliferation.
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Affiliation(s)
- Ying Zhou
- Departmemt of Hematology, The First Affiliated Hospital, Jinan University Guangzhou, China
| | - Dongmei He
- School of Medicine, Institute of Hematology, Jinan University Guangzhou, China
| | - Jinrong Zeng
- Departmemt of Hematology, The First Affiliated Hospital, Jinan University Guangzhou, China
| | - Shijie Bao
- Departmemt of Hematology, The First Affiliated Hospital, Jinan University Guangzhou, China
| | - Jing Lai
- Departmemt of Hematology, The First Affiliated Hospital, Jinan University Guangzhou, China
| | - Yujun Weng
- Department of Internal Medicine, Guangzhou Nansha Central Hospital Guangzhou, China
| | - Shengting Chen
- Departmemt of Hematology, The First Affiliated Hospital, Jinan University Guangzhou, China
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15
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Guo L, Zhao J, Qu Y, Yin R, Gao Q, Ding S, Zhang Y, Wei J, Xu G. microRNA-20a Inhibits Autophagic Process by Targeting ATG7 and ATG16L1 and Favors Mycobacterial Survival in Macrophage Cells. Front Cell Infect Microbiol 2016; 6:134. [PMID: 27803889 PMCID: PMC5067373 DOI: 10.3389/fcimb.2016.00134] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 10/03/2016] [Indexed: 12/04/2022] Open
Abstract
Autophagy plays important roles in the host immune response against mycobacterial infection. Mycobacterium tuberculosis (M. tuberculosis) can live in macrophages owing to its ability to evade attacks by regulating autophagic response. MicroRNAs (miRNAs) are small noncoding, endogenously encoded RNA which plays critical roles in precise regulation of macrophage functions. Whether miRNAs specifically influence the activation of macrophage autophagy during M. tuberculosis infection are largely unknown. In this study, we demonstrate that BCG infection of macrophages resulted in enhanced expression of miRNA-20a, which inhibits autophagic process by targeting ATG7 and ATG16L1 and promotes BCG survival in macrophages. Forced overexpression of miR-20a decreased the expression levels of LC3-II and the number of LC3 puncta in macrophages, and promoted BCG survival in macrophages, while transfection with miR-20a inhibitor had the opposite effect. Moreover, the inhibitory effect of miR-20a on autophagy was further confirmed by transmission electron microscopy (TEM) analysis. Quantification of autophagosomes per cellular cross-section revealed a significant reduction upon transfection with miR-20a mimic, but transfection with miR-20a inhibitor increased the number of autophagosomes per cellular cross-section. Moreover, silencing of ATG7 significantly inhibited autophagic response, and transfection with ATG7 siRNA plus miR-20a mimic could further decrease autophagic response. Collectively, our data reveal that miR-20a inhibits autophagic response and promotes BCG survival in macrophages by targeting ATG7 and ATG16L1, which may have implications for a better understanding of pathogenesis of M. tuberculosis infection.
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Affiliation(s)
- Le Guo
- Ningxia Key Laboratory of Clinical and Pathogenic Microbiology, General Hospital of Ningxia Medical UniversityYinchuan, China; Department of Medical Laboratory, School of Clinical Medicine, Ningxia Medical UniversityYinchuan, China; Ningxia Key Laboratory of Clinical and Pathogenic MicrobiologyYinchuan, China
| | - Jin Zhao
- Department of Medical Laboratory, School of Clinical Medicine, Ningxia Medical UniversityYinchuan, China; Ningxia Key Laboratory of Clinical and Pathogenic MicrobiologyYinchuan, China; Clinical Laboratory, General Hospital of Tianjin Medical UniversityTianjin, China
| | - Yuliang Qu
- Department of Medical Laboratory, School of Clinical Medicine, Ningxia Medical UniversityYinchuan, China; Ningxia Key Laboratory of Clinical and Pathogenic MicrobiologyYinchuan, China
| | - Runting Yin
- Medical School of Nantong University, Nantong University Nantong, China
| | - Qian Gao
- Department of Medical Laboratory, School of Clinical Medicine, Ningxia Medical UniversityYinchuan, China; Ningxia Key Laboratory of Clinical and Pathogenic MicrobiologyYinchuan, China
| | - Shuqin Ding
- Department of Medical Laboratory, School of Clinical Medicine, Ningxia Medical UniversityYinchuan, China; Ningxia Key Laboratory of Clinical and Pathogenic MicrobiologyYinchuan, China
| | - Ying Zhang
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University Baltimore, MD, USA
| | - Jun Wei
- Ningxia Key Laboratory of Clinical and Pathogenic Microbiology, General Hospital of Ningxia Medical UniversityYinchuan, China; Department of Medical Laboratory, School of Clinical Medicine, Ningxia Medical UniversityYinchuan, China; Ningxia Key Laboratory of Clinical and Pathogenic MicrobiologyYinchuan, China
| | - Guangxian Xu
- Ningxia Key Laboratory of Clinical and Pathogenic Microbiology, General Hospital of Ningxia Medical UniversityYinchuan, China; Department of Medical Laboratory, School of Clinical Medicine, Ningxia Medical UniversityYinchuan, China; Ningxia Key Laboratory of Clinical and Pathogenic MicrobiologyYinchuan, China
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16
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Xu T, Jing C, Shi Y, Miao R, Peng L, Kong S, Ma Y, Li L. microRNA-20a enhances the epithelial-to-mesenchymal transition of colorectal cancer cells by modulating matrix metalloproteinases. Exp Ther Med 2015; 10:683-688. [PMID: 26622375 DOI: 10.3892/etm.2015.2538] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Accepted: 04/13/2015] [Indexed: 12/13/2022] Open
Abstract
The mortality rates associated with colorectal cancer (CRC) are high due to metastasis. Epithelial-to-mesenchymal transition (EMT) is a key step in tumor metastasis. The aim of the present study was to investigate the function of microRNA-20a (miR-20a) in EMT. The expression of miR-20a was analyzed in CRC tissues and cell lines using the reverse transcription-quantitative polymerase chain reaction. Plasmids containing miR-20a short hairpin RNA and miR-20a mimics were transfected into SW620 and LS174T cell lines, respectively. Cell counting kit-8, Transwell® and wound healing assays were performed to assess the effects of miR-20a on cell proliferation, invasion and migration. EMT markers and matrix metalloproteinases (MMPs) were identified using western blotting. The results showed that increased expression of miR-20a in CRC tissues was associated with tumor invasion and lymph node metastasis (P<0.05). Further experiments indicated that miR-20a-knockdown inhibited the proliferation, invasion and migration of CRC cells, upregulated the expression of vimentin and tissue inhibitor of metalloproteinases-2 (TIMP-2) and downregulated the expression of E-cadherin, MMP-2 and MMP-9. The opposite effects were observed in CRC cell lines overexpressing miR-20a. In conclusion, these results have shown that the upregulation of miR-20a suppresses TIMP-2 expression, which subsequently increases the expression of MMP-2 and MMP-9, thereby promoting the EMT of CRC cells. These findings suggest that miR-20a represents a potential therapeutic target for patients with CRC.
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Affiliation(s)
- Tao Xu
- Department of Gastrointestinal Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Changqing Jing
- Department of Gastrointestinal Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Yulong Shi
- Department of Gastrointestinal Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Ruizheng Miao
- Department of Gastrointestinal Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Lipan Peng
- Department of Gastrointestinal Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Shuai Kong
- Department of Gastrointestinal Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Yan Ma
- Department of Gastrointestinal Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Leping Li
- Department of Gastrointestinal Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
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