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Waseem A, Rashid S, Rashid K, Khan MA, Khan R, Haque R, Seth P, Raza SS. Insight into the transcription factors regulating Ischemic Stroke and Glioma in Response to Shared Stimuli. Semin Cancer Biol 2023; 92:102-127. [PMID: 37054904 DOI: 10.1016/j.semcancer.2023.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 03/28/2023] [Accepted: 04/09/2023] [Indexed: 04/15/2023]
Abstract
Cerebral ischemic stroke and glioma are the two leading causes of patient mortality globally. Despite physiological variations, 1 in 10 people who have an ischemic stroke go on to develop brain cancer, most notably gliomas. In addition, glioma treatments have also been shown to increase the risk of ischemic strokes. Stroke occurs more frequently in cancer patients than in the general population, according to traditional literature. Unbelievably, these events share multiple pathways, but the precise mechanism underlying their co-occurrence remains unknown. Transcription factors (TFs), the main components of gene expression programmes, finally determine the fate of cells and homeostasis. Both ischemic stroke and glioma exhibit aberrant expression of a large number of TFs, which are strongly linked to the pathophysiology and progression of both diseases. The precise genomic binding locations of TFs and how TF binding ultimately relates to transcriptional regulation remain elusive despite a strong interest in understanding how TFs regulate gene expression in both stroke and glioma. As a result, the importance of continuing efforts to understand TF-mediated gene regulation is highlighted in this review, along with some of the primary shared events in stroke and glioma.
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Affiliation(s)
- Arshi Waseem
- Laboratory for Stem Cell & Restorative Neurology, Department of Biotechnology, Era's Lucknow Medical College and Hospital, Era University, Sarfarazganj, Lucknow-226003, India
| | - Sumaiya Rashid
- Department of Pharmacology & Toxicology, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
| | - Khalid Rashid
- Department of Cancer Biology, Vontz Center for Molecular Studies, Cincinnati, OH 45267-0521
| | | | - Rehan Khan
- Chemical Biology Unit, Institute of Nano Science and Technology, Knowledge City,Mohali, Punjab 140306, India
| | - Rizwanul Haque
- Department of Biotechnology, Central University of South Bihar, Gaya -824236, India
| | - Pankaj Seth
- Molecular and Cellular Neuroscience, Neurovirology Section, National Brain Research Centre, Manesar, Haryana-122052, India
| | - Syed Shadab Raza
- Laboratory for Stem Cell & Restorative Neurology, Department of Biotechnology, Era's Lucknow Medical College and Hospital, Era University, Sarfarazganj, Lucknow-226003, India; Department of Stem Cell Biology and Regenerative Medicine, Era's Lucknow Medical College Hospital, Era University, Sarfarazganj, Lucknow-226003, India
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Jin FF, Wang CJ, Cui L, Liu FF, Wang KL, Li WJ, Li ZG. Interaction of E2F3a and CASP8AP2 Regulates Histone Expression and Chemosensitivity of Leukemic Cells. J Pediatr Hematol Oncol 2023; 45:e339-e344. [PMID: 36162009 PMCID: PMC10030168 DOI: 10.1097/mph.0000000000002558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 08/15/2022] [Indexed: 11/27/2022]
Abstract
Low expression levels of E2F3a and caspase 8-associated protein 2 (CASP8AP2) are associated with poor outcomes in children with acute lymphoblastic leukemia. Our previous study showed that a combined assessment of E2F3a and CASP8AP2 expression was more accurate in predicting relapse in children with acute lymphoblastic leukemia. However, the underlying mechanism remains unclear. In this study, the interaction between E2F3a and CASP8AP2 and its role in the regulation of histone expression, cell proliferation, the cell cycle, and chemosensitivity were investigated. Exogenous E2F3a-GST was coprecipitated with CASP8AP2-FLAG in HEK-293T cells. E2F3a was colocalized with CASP8AP2-GFP in the nucleus. The replication-dependent histones H2A and H2B were significantly upregulated when E2F3a or CASP8AP2 was overexpressed in HEK-293T or 697 cells and downregulated by E2F3a or CASP8AP2 knockdown. E2F3a and CASP8AP2 could collaboratively enhance the transcriptional activity of HIST1H2AG and HIST1H2BK . Both CASP8AP2 and E2F3a are involved in S phase progression. E2F3a and CASP8AP2 also affected the sensitivity of leukemic cells to daunorubicin. Therefore, CASP8AP2 and E2F3a collaboratively regulated replication-dependent histone expression, cell cycle progression, and chemosensitivity of leukemic cells.
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Affiliation(s)
- Fen-fen Jin
- Beijing Key Laboratory of Pediatric Hematology-Oncology, National Key Discipline of Pediatrics, Capital Medical University, Key Laboratory of Major Diseases in Children, Ministry of Education, Hematologic Diseases Laboratory, Hematology Center, Beijing Pediatric Research Institute, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health
- Department of Hematology-Oncology, Children’s Hospital, Zhejiang University School of Medicine, The Pediatric Leukemia Diagnostic and Therapeutic Technology Research Center of Zhejiang Province, National Clinical Research Center for Child Health, Hangzhou, China
| | - Chan-juan Wang
- Beijing Key Laboratory of Pediatric Hematology-Oncology, National Key Discipline of Pediatrics, Capital Medical University, Key Laboratory of Major Diseases in Children, Ministry of Education, Hematologic Diseases Laboratory, Hematology Center, Beijing Pediatric Research Institute, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health
| | - Lei Cui
- Beijing Key Laboratory of Pediatric Hematology-Oncology, National Key Discipline of Pediatrics, Capital Medical University, Key Laboratory of Major Diseases in Children, Ministry of Education, Hematologic Diseases Laboratory, Hematology Center, Beijing Pediatric Research Institute, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health
| | - Fei-fei Liu
- Department of Pediatrics, Affiliated Hospital of Binzhou Medical University, Binzhou, China
| | - Kai-ling Wang
- Department of Pediatrics, Beijing Luhe Hospital, Capital Medical University, Beijing
| | - Wei-jing Li
- Beijing Key Laboratory of Pediatric Hematology-Oncology, National Key Discipline of Pediatrics, Capital Medical University, Key Laboratory of Major Diseases in Children, Ministry of Education, Hematologic Diseases Laboratory, Hematology Center, Beijing Pediatric Research Institute, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health
| | - Zhi-gang Li
- Beijing Key Laboratory of Pediatric Hematology-Oncology, National Key Discipline of Pediatrics, Capital Medical University, Key Laboratory of Major Diseases in Children, Ministry of Education, Hematologic Diseases Laboratory, Hematology Center, Beijing Pediatric Research Institute, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health
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Role of E2F transcription factor in Oral cancer: Recent Insight and Advancements. Semin Cancer Biol 2023; 92:28-41. [PMID: 36924812 DOI: 10.1016/j.semcancer.2023.03.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 02/27/2023] [Accepted: 03/06/2023] [Indexed: 03/16/2023]
Abstract
The family of mammalian E2F transcription factors (E2Fs) comprise of 8 members (E2F1-E2F8) classified as activators (E2F1-E2F3) and repressors (E2F4-E2F8) primarily regulating the expression of several genes related to cell proliferation, apoptosis and differentiation, mainly in a cell cycle-dependent manner. E2F activity is frequently controlled via the retinoblastoma protein (pRb), cyclins, p53 and the ubiquitin-proteasome pathway. Additionally, genetic or epigenetic changes result in the deregulation of E2F family genes expression altering S phase entry and apoptosis, an important hallmark for the onset and development of cancer. Although studies reveal E2Fs to be involved in several human malignancies, the mechanisms underlying the role of E2Fs in oral cancer lies nascent and needs further investigations. This review focuses on the role of E2Fs in oral cancer and the etiological factors regulating E2Fs activity, which in turn transcriptionally control the expression of their target genes, thus contributing to cell proliferation, metastasis, and drug/therapy resistance. Further, we will discuss therapeutic strategies for E2Fs, which may prevent oral tumor growth, metastasis, and drug resistance.
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Akao Y, Terazawa R, Sugito N, Heishima K, Morikawa K, Ito Y, Narui R, Hamaguchi R, Nobukawa T. Understanding of cell death induced by the constituents of Taxus yunnanensis wood. Sci Rep 2022; 12:6282. [PMID: 35428370 PMCID: PMC9012736 DOI: 10.1038/s41598-022-09655-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Accepted: 03/21/2022] [Indexed: 11/09/2022] Open
Abstract
The ethanol extract from the wood of Taxus Yunnanensis (TY) induced apoptosis in all cancer cell lines tested, which was mainly due to activation of an extrinsic pathway in human colon cancer DLD-1 cells. The extrinsic pathway was activated by the upregulation of the expression levels of Fas and TRAIL/DR5, which led to the activation of caspase-8. Of note, the machinery of this increase in expression was promoted by the upregulation of MIR32a expression, which silenced MIR34a-targeting E2F3 transcription factor. Furthermore, ectopic expression of MIR32a or siR-E2F3 silencing E2F3 increased Fas and TRAIL/DR5 expression. Thus, the extract activated the extrinsic pathway through the MIR34a/E2F3 axis, resulting in the autocrine and paracrine release of TRAIL, and upregulated expression of death receptors Fas and DR5 in the treated DLD-1 cells, which were functionally validated by Fas immunocytochemistry, and using anti-Fas and anti-TRAIL antibodies, respectively. In vivo, TY showed significant anti-tumor effects on xenografted and syngeneic model mice. The extract may also aid in chemoprevention by selectively making marked tumor cells susceptible to the tumor immunosurveillance system.
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Affiliation(s)
- Yukihiro Akao
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan.
| | - Riyako Terazawa
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan
| | - Nobuhiko Sugito
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan
| | - Kazuki Heishima
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan
| | - Kohei Morikawa
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu, Japan
| | - Yuko Ito
- Department of General and Gastroenterological Surgery, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Ryoko Narui
- Karasuma Wada Clinic, Nakagyo-ku, Kyoto, 604-0845, Japan
| | - Reo Hamaguchi
- Karasuma Wada Clinic, Nakagyo-ku, Kyoto, 604-0845, Japan
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Luo H, Tao C, Long X, Zhu X, Huang K. Early 2 factor (E2F) transcription factors contribute to malignant progression and have clinical prognostic value in lower-grade glioma. Bioengineered 2021; 12:7765-7779. [PMID: 34617871 PMCID: PMC8806968 DOI: 10.1080/21655979.2021.1985340] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Early 2 factor (E2F) genes encoding a family of transcription factors are significantly associated with apoptosis, metabolism, and angiogenesis in several tumor types. However, the biological functions of E2F transcription factors (E2Fs) and their potential involvement in the malignancy of lower-grade glioma (LGG) remain unclear. We explored the effects of the expression of eight E2F family members on the clinical characteristics of LGG based on the Chinese Glioma Genome Atlas (CGGA), The Cancer Genome Atlas (TCGA), and GSE16011 datasets. Two LGG subgroups were identified according to the consensus clustering of the eight E2Fs. We employed the least absolute shrinkage and selection operator (LASSO) Cox regression algorithm for further functional experiments and the development of a potential risk score. Two categories of patients with LGG were identified based on the median risk scores. We then developed a nomogram based on the results of the multivariate analysis. Real-time quantitative polymerase chain reaction (RT-qPCR) and immunohistochemistry were performed to validate the bioinformatics results. Our results indicated that E2F family members were significantly involved in the malignancy of LGG and might serve as effective prognostic biomarkers of the disease.
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Affiliation(s)
- Haitao Luo
- Department of Neurosurgery, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
| | - Chuming Tao
- Department of Neurosurgery, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China.,Scientific Research Center, East China Institute of Digital Medical Engineering, Shangrao, Jiangxi Province, China
| | - Xiaoyan Long
- Scientific Research Center, East China Institute of Digital Medical Engineering, Shangrao, Jiangxi Province, China
| | - Xingen Zhu
- Department of Neurosurgery, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China.,Institute of Neuroscience, Nanchang University, Nanchang, Jiangxi Province, China
| | - Kai Huang
- Department of Neurosurgery, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China.,Institute of Neuroscience, Nanchang University, Nanchang, Jiangxi Province, China
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Chen C, Chen Q, Wu J, Zou H. H3K27ac-induced FOXC2-AS1 accelerates tongue squamous cell carcinoma by upregulating E2F3. J Oral Pathol Med 2021; 50:1018-1030. [PMID: 34358374 DOI: 10.1111/jop.13232] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/09/2021] [Accepted: 07/13/2021] [Indexed: 12/23/2022]
Abstract
BACKGROUND The important roles of lncRNAs have been reported in cancers, including tongue squamous cell carcinoma (TSCC). Here, we investigated the functional role and molecular mechanisms of lncRNA FOXC2-AS1 in TSCC. METHODS The expression level of FOXC2-AS1 in TSCC was determined by RT-qPCR. Its biological role was evaluated through colony formation assay, flow cytometry, wound healing, transwell, and Western blot analyses. The interactions among gene were tested by mechanistic investigations. RESULTS FOXC2-AS1 expression was high in TSCC tissues and cells. Functional assays in vitro showed that silencing FOXC2-AS1 restrained cell proliferation, cell cycle, migration, invasion, and EMT. In the mechanism, it was verified that H3K27 acetylation (H3K27ac) triggered an increase in FOXC2-AS1 expression. Furthermore, FOXC2-AS1 was identified as a cytoplasmic lncRNA and served as a ceRNA to upregulate E2F3 expression via sponging miR-6868-5p. CONCLUSION H3K27ac-induced FOXC2-AS1 exhibits carcinogenic property in TSCC by the miR-6868-5p/E2F3 axis.
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Affiliation(s)
- Cuiting Chen
- Department of Stomatology, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Qiongyu Chen
- Department of Stomatology, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Jian Wu
- Department of Stomatology, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Han Zou
- Department of Stomatology, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
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Zhou Y, Chai H, Guo L, Dai Z, Lai J, Duan J, Liu Y, Ding Q. Knockdown of CENPW Inhibits Hepatocellular Carcinoma Progression by Inactivating E2F Signaling. Technol Cancer Res Treat 2021; 20:15330338211007253. [PMID: 33973496 PMCID: PMC8120521 DOI: 10.1177/15330338211007253] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Aim: This study aimed to evaluate the effects of centromere protein W (CENPW, also known as CUG2) in hepatocellular carcinoma (HCC). Methods: CENPW expression in HCC tissues and cells was detected by RT-qPCR assay. CCK-8 and colony formation assay were used to assess cell proliferation. Wound healing and Transwell assay was used to detect cell migration and invasion, respectively. The flow cytometry was used to analyze the cell cycle distribution and apoptosis. Results: CENPW expression was upregulated in HCC tissues and cells. Knockdown of CENPW inhibited cell proliferation, migration, and invasion and induced the G0/G1 phase arrest and cell apoptosis in HCC cells, which might involve the E2F signaling regulation. Conclusion: CENPW acted as an oncogenic role in HCC progression via activation E2F signaling. Our findings may provide new insights into the studying mechanisms of HCC.
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Affiliation(s)
- Yajing Zhou
- Department of Physical Therapy, Qingdao No.6 People's Hospital, Qingdao, Shandong, People's Republic of China
| | - Hua Chai
- Department of Liver Disease, Qingdao No.6 People's Hospital, Qingdao, Shandong, People's Republic of China
| | - Lei Guo
- Department of Infectious Diseases, Qingdao No.6 People's Hospital, Qingdao, Shandong, People's Republic of China
| | - Zhongqiu Dai
- Department of Infectious Diseases, Qingdao No.6 People's Hospital, Qingdao, Shandong, People's Republic of China
| | - Jianming Lai
- Medical College, 12593Qingdao University, Qingdao, Shandong, People's Republic of China
| | - Jianping Duan
- Department of Infectious Diseases, Qingdao No.6 People's Hospital, Qingdao, Shandong, People's Republic of China
| | - Yanting Liu
- Department of Ten Areas of Liver Disease, Qingdao No.6 People's Hospital, Qingdao, Shandong, People's Republic of China
| | - Qian Ding
- Department of Infectious Diseases, Qingdao No.6 People's Hospital, Qingdao, Shandong, People's Republic of China
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Expression, Prognosis, and Immune Infiltrates Analyses of E2Fs in Human Brain and CNS Cancer. BIOMED RESEARCH INTERNATIONAL 2020; 2020:6281635. [PMID: 33381564 PMCID: PMC7755476 DOI: 10.1155/2020/6281635] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 08/06/2020] [Indexed: 12/24/2022]
Abstract
Objective We investigated the expression patterns, potential functions, unique prognostic value, and potential therapeutic targets of E2Fs in brain and CNS cancer and tumor-infiltrating immune cell microenvironments. Methods We analyzed E2F mRNA expression levels in diverse cancer types via Oncomine and GEPIA databases, respectively. Moreover, we evaluated the prognostic values using GEPIA database and TCGAportal database and the correlation of E2F expression with immune infiltration and the correlation between immune cell infiltration and GBM and LGG prognosis via TIMER database. Then, cBioPortal, GeneMANIA, and DAVID databases were used for mutation analysis, PPI network analysis of coexpressed gene, and functional enrichment analysis. Results E2F1-8 expression increased in most cancers, including brain and CNS cancer. Higher expression in E2F1, 2, 4, 6, 7, and 8 indicated poor OS of LGG. Higher E2F3–6 and E2F1–8 expressions correlated with poor prognosis and increased immune infiltration levels in CD8+ T cells, macrophages, neutrophils, and DCs in GBM and CD8+ T cells, B cells, CD4+ T cells, neutrophils, macrophages, and DCs in LGG, respectively. Conclusion E2F1–8 and E2F2–8 could be hopeful prognostic biomarkers of GBM and LGG, respectively. E2F3–6 and E2F1–8 could be likely therapeutic targets in patients with immune cell infiltration of GBM and LGG, respectively.
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Gao W, Zhou X, Lin R. miR-378a-5p and miR-630 induce lens epithelial cell apoptosis in cataract via suppression of E2F3. ACTA ACUST UNITED AC 2020; 53:e9608. [PMID: 32348429 PMCID: PMC7197652 DOI: 10.1590/1414-431x20209608] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 03/06/2020] [Indexed: 12/16/2022]
Abstract
Cataract, an eye disease that threatens the health of millions of people, brings about severe economic burden for patients and society. MicroRNA (miR)-378a-5p and miR-630 were recognized as essential regulators in multiple cancers. However, the exact functions of miR-378a-5p and miR-630 in cataract are still unclear. The expression of miR-378a-5p, miR-630, and E2F transcription factor 3 (E2F3) in tissues and cells was measured by quantitative real-time polymerase chain reaction. The 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide assay was used to evaluate cell viability. Flow cytometry was conducted to analyze cell apoptosis. The interaction between E2F3 and miR-378a-5p or miR-630 was confirmed by dual-luciferase reporter assay. The expression of proteins E2F3, B cell lymphoma (Bcl-2), Bcl-2 associated X (Bax), and cleaved caspase 3 was detected by western blot assay. The expression of miR-378a-5p and miR-630 was up-regulated whereas E2F3 was down-regulated in human cataract lens tissues compared with normal lens tissues. Depletion of miR-378a-5p or miR-630 enhanced proliferation and reduced apoptosis of human lens epithelial cells. Interestingly, up-regulation of E2F3 exhibited the same trend. Next, dual-luciferase reporter assay validated the interaction between E2F3 and miR-378a-5p or miR-630. The rescue experiments further revealed that E2F3 knockdown could recover miR-378a-5p, and miR-630 inhibitor induced promotion of cell proliferation and inhibition of apoptosis in cataract. miR-378a-5p and miR-630 repressed proliferation and induced apoptosis of lens epithelial cells by targeting E2F3 in cataract, representing a prospective alternative therapy for cataract.
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Affiliation(s)
- Weiwei Gao
- Department of Ophthalmology, People's Hospital of Zhaoyuan City, Zhaoyuan, Shandong, China
| | - Xiaoqing Zhou
- Department of Ophthalmology, Shanghai Changzheng Hospital, China Naval Medical University, Shanghai, China
| | - Ruihua Lin
- Department of Ophthalmology, People's Hospital of Zhaoyuan City, Zhaoyuan, Shandong, China
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Li H, Pan R, Lu Q, Ren C, Sun J, Wu H, Wen J, Chen H. MicroRNA‑145‑5p inhibits osteosarcoma cell proliferation by targeting E2F transcription factor 3. Int J Mol Med 2020; 45:1317-1326. [PMID: 32323741 PMCID: PMC7138290 DOI: 10.3892/ijmm.2020.4504] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 12/20/2019] [Indexed: 12/19/2022] Open
Abstract
Osteosarcoma is a common type of bone tumor that primarily occurs in children and young adults. MicroRNA (miRNA/miR) dysregulation is associated with the progression of osteosarcoma; therefore, the aim of the present study was to investigate the biological functions and molecular mechanisms of miR-145-5p in osteosarcoma. The expression of miR-145-5p in osteosarcoma tissues and cell lines was quantified using reverse transcription-quantitative PCR (RT-qPCR). The effect of miR-145-5p on the proliferation of osteosarcoma cells was detected using Cell Counting Kit-8 and colony formation assays, as well as cell cycle distribution analysis. The effect of miR-145-5p on tumor growth was further investigated in vivo using a subcutaneous tumor model in nude mice. The interaction between miR-145-5p and E2F transcription factor 3 (E2F3) was determined using bioinformatics analysis, a luciferase assay, RT-qPCR and western blotting. The results revealed that miR-145-5p expression was decreased in osteosarcoma cell lines and tissues compared with the corresponding normal controls. Increased miR-145-5p expression inhibited the proliferation and colony formation ability of osteosarcoma cells, and induced G1 phase arrest. Furthermore, mice injected with tumor cells overexpressing miR-145-5p exhibited smaller tumors than those in the control group. Further investigation revealed that miR-145-5p binds to and decreases the expression of E2F3. In addition, the mRNA levels of E2F3 were negatively associated with miR-145-5p in osteosarcoma tissues, and increasing E2F3 expression abrogated the inhibitory effects of miR-145-5p on osteosarcoma cells. Collectively, the results obtained in the present study suggest that miR-145-5p may suppress the progression of osteosarcoma, and may serve as a useful biomarker for the diagnosis of osteosarcoma, as well as a therapeutic target.
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Affiliation(s)
- Hao Li
- Department of Orthopedics, Guiyang Maternal and Child Health-Care Hospital, Guiyang, Guizhou 550000, P.R. China
| | - Runsang Pan
- Department of Orthopedics, Guiyang Maternal and Child Health-Care Hospital, Guiyang, Guizhou 550000, P.R. China
| | - Qiaoying Lu
- Department of Orthopedics, Guiyang Maternal and Child Health-Care Hospital, Guiyang, Guizhou 550000, P.R. China
| | - Chong Ren
- Department of Orthopedics, Guiyang Maternal and Child Health-Care Hospital, Guiyang, Guizhou 550000, P.R. China
| | - Junkang Sun
- Department of Orthopedics, Guiyang Maternal and Child Health-Care Hospital, Guiyang, Guizhou 550000, P.R. China
| | - Huaping Wu
- Department of Orthopedics, Guiyang Maternal and Child Health-Care Hospital, Guiyang, Guizhou 550000, P.R. China
| | - Jing Wen
- Department of Pathology, Renmin Hospital of Guizhou, Guiyang, Guizhou 550000, P.R. China
| | - Houping Chen
- Department of Orthopedics, Guiyang Maternal and Child Health-Care Hospital, Guiyang, Guizhou 550000, P.R. China
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Gong W, Li J, Wang Y, Meng J, Zheng G. miR-221 promotes lens epithelial cells apoptosis through interacting with SIRT1 and E2F3. Chem Biol Interact 2019; 306:39-46. [DOI: 10.1016/j.cbi.2019.03.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 03/15/2019] [Accepted: 03/25/2019] [Indexed: 11/29/2022]
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