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Hamdy NM, Zaki MB, Rizk NI, Abdelmaksoud NM, Abd-Elmawla MA, Ismail RA, Abulsoud AI. Unraveling the ncRNA landscape that governs colorectal cancer: A roadmap to personalized therapeutics. Life Sci 2024; 354:122946. [PMID: 39122108 DOI: 10.1016/j.lfs.2024.122946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 07/23/2024] [Accepted: 08/04/2024] [Indexed: 08/12/2024]
Abstract
Colorectal cancer (CRC) being one of the most common malignancies, has a significant death rate, especially when detected at an advanced stage. In most cases, the fundamental aetiology of CRC remains unclear despite the identification of several environmental and intrinsic risk factors. Numerous investigations, particularly in the last ten years, have indicated the involvement of epigenetic variables in this type of cancer. The development, progression, and metastasis of CRC are influenced by long non-coding RNAs (lncRNAs), which are significant players in the epigenetic pathways. LncRNAs are implicated in diverse pathological processes in CRC, such as liver metastasis, epithelial to mesenchymal transition (EMT), inflammation, and chemo-/radioresistance. It has recently been determined that CRC cells and tissues exhibit dysregulation of tens of oncogenic and tumor suppressor lncRNAs. Serum samples from CRC patients exhibit dysregulated expressions of several of these transcripts, offering a non-invasive method of detecting this kind of cancer. In this review, we outlined the typical paradigms of the deregulated lncRNA which exert significant role in the underlying molecular mechanisms of CRC initiation and progression. We comprehensively discuss the role of lncRNAs as innovative targets for CRC prognosis and treatment.
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Affiliation(s)
- Nadia M Hamdy
- Biochemistry Department, Faculty of Pharmacy, Ain Shams University, Abbasia Cairo, 11566, Egypt.
| | - Mohamed Bakr Zaki
- Department of Biochemistry, Faculty of Pharmacy, University of Sadat City, Menoufia, 32897, Egypt
| | - Nehal I Rizk
- Biochemistry Department, Faculty of Pharmacy, Heliopolis University, Cairo 11785, Egypt
| | | | - Mai A Abd-Elmawla
- Department of Biochemistry, Faculty of Pharmacy, Cairo University, Kasr Al Ainy, Cairo, 11562, Egypt
| | - Rehab A Ismail
- Biochemistry Department, Faculty of Pharmacy, Heliopolis University, Cairo 11785, Egypt
| | - Ahmed I Abulsoud
- Biochemistry Department, Faculty of Pharmacy, Heliopolis University, Cairo 11785, Egypt; Biochemistry and Molecular Biology Department, Faculty of Pharmacy (Boys), Al Azhar University, Nasr City, Cairo, 11231, Egypt
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2
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Wang M, Fu L, Xu Y, Ma S, Zhang X, Zheng L. A comprehensive overview of exosome lncRNAs: Emerging biomarkers and potential therapeutics in gynecological cancers. Front Oncol 2023; 13:1138142. [PMID: 37007117 PMCID: PMC10063919 DOI: 10.3389/fonc.2023.1138142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 03/06/2023] [Indexed: 03/19/2023] Open
Abstract
Ovarian, endometrial, and cervical cancer are common gynecologic malignancies, and their incidence is increasing year after year, with a younger patient population at risk. An exosome is a tiny “teacup-like” blister that can be secreted by most cells, is highly concentrated and easily enriched in body fluids, and contains a large number of lncRNAs carrying some biological and genetic information that can be stable for a long time and is not affected by ribonuclease catalytic activity. As a cell communication tool, exosome lncRNA has the advantages of high efficiency and high targeting. Changes in serum exosome lncRNA expression in cancer patients can accurately reflect the malignant biological behavior of cancer cells. Exosome lncRNA has been shown in studies to have broad application prospects in cancer diagnosis, monitoring cancer recurrence or progression, cancer treatment, and prognosis. The purpose of this paper is to provide a reference for clinical research on the pathogenesis, diagnosis, and treatment of gynecologic malignant tumors by reviewing the role of exosome lncRNA in gynecologic cancers and related molecular mechanisms.
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Xu J, Wang X, Zhu C, Wang K. A review of current evidence about lncRNA MEG3: A tumor suppressor in multiple cancers. Front Cell Dev Biol 2022; 10:997633. [PMID: 36544907 PMCID: PMC9760833 DOI: 10.3389/fcell.2022.997633] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 11/22/2022] [Indexed: 12/12/2022] Open
Abstract
Long non-coding RNA (lncRNA) maternally expressed gene 3 (MEG3) is a lncRNA located at the DLK1-MEG3 site of human chromosome 14q32.3. The expression of MEG3 in various tumors is substantially lower than that in normal adjacent tissues, and deletion of MEG3 expression is involved in the occurrence of many tumors. The high expression of MEG3 could inhibit the occurrence and development of tumors through several mechanisms, which has become a research hotspot in recent years. As a member of tumor suppressor lncRNAs, MEG3 is expected to be a new target for tumor diagnosis and treatment. This review discusses the molecular mechanisms of MEG3 in different tumors and future challenges for the diagnosis and treatment of cancers through MEG3.
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Affiliation(s)
- Jie Xu
- Department of Urology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Xia Wang
- Department of Urology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Chunming Zhu
- Department of Family Medicine, Shengjing Hospital of China Medical University, Shenyang, China,*Correspondence: Chunming Zhu, ; Kefeng Wang,
| | - Kefeng Wang
- Department of Urology, Shengjing Hospital of China Medical University, Shenyang, China,*Correspondence: Chunming Zhu, ; Kefeng Wang,
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Liang M, Li Y, Dai T, Chen C. lncRNA FEZF1-AS1 regulates biological behaviors of cervical cancer by targeting miRNA-1254. Food Sci Nutr 2021; 9:4722-4737. [PMID: 34531986 PMCID: PMC8441442 DOI: 10.1002/fsn3.2315] [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] [Received: 12/07/2020] [Revised: 02/26/2021] [Accepted: 03/01/2021] [Indexed: 11/21/2022] Open
Abstract
AIM The purpose of this research was to evaluate lncRNA FEZF1-AS1 in cervical cancer development and clinical significance. MATERIALS AND METHODS Collecting cervical cancer tissues, measuring FEZF1-AS1 expression, and analysis correlation between FEZF1-AS1 and prognosis. In cell vitro study, using MTT assay to measure cell proliferation, evaluating cell apoptosis by flow cytometry, measuring cell invasion and migration by Transwell and wound healing assay; lncRNA FEZF1-AS1 and miR-1254 gene expressions were evaluated by RT-qPCR assay; relative protein (Smurf1, E-cadherin, Vimentin, N-cadherin, AKT, p-AKT, c-Myc, and ZEB1) expressions were measured by Western blot assay. The correlation among FEZF1-AS1, miR-1254, and Smurf1 were analysis by dual luciferase reporter gene assay. RESULTS By clinical analysis, lncRNA FEZF1-AS1 was high expression in cervical cancer tissues and high expression was closely correlated with poor prognosis in cervical cancer patients. In vitro study, the SiHa and HeLa cell biologically including cell proliferation, migration, and invasion of si-FEZF1-AS1 group which knockdown lncRNA FEZF1-AS1 were significantly depressed (p < .001, respectively). However, with miR-1254 expression inhibiting, the cell biological activities were significantly increased in si-FEZF1-AS1+miRNA inhibitor groups (p < .001, respectively). CONCLUSION lncRNA FEZF1-AS1 might be an oncological role in cervical cancer; lncRNA FEZF1-AS1 knockdown had antitumor effects with miR-1254 activating in cervical cancer by in vitro study.
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Affiliation(s)
- Miao Liang
- Department of gynaecology and obstetricsChongqing General HospitalUniversity of Chinese Academy of SciencesChongqingChina
| | - Yongkang Li
- Department of gynaecology and obstetricsChongqing General HospitalUniversity of Chinese Academy of SciencesChongqingChina
| | - Tingting Dai
- Department of gynaecology and obstetricsChongqing General HospitalUniversity of Chinese Academy of SciencesChongqingChina
| | - Cheng Chen
- Department of gynaecology and obstetricsChongqing General HospitalUniversity of Chinese Academy of SciencesChongqingChina
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5
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Cáceres-Durán MÁ, Ribeiro-dos-Santos Â, Vidal AF. Roles and Mechanisms of the Long Noncoding RNAs in Cervical Cancer. Int J Mol Sci 2020; 21:ijms21249742. [PMID: 33371204 PMCID: PMC7766288 DOI: 10.3390/ijms21249742] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 12/03/2020] [Accepted: 12/10/2020] [Indexed: 02/07/2023] Open
Abstract
Cervical cancer (CC) continues to be one of the leading causes of death for women across the world. Although it has been determined that papillomavirus infection is one of the main causes of the etiology of the disease, genetic and epigenetic factors are also required for its progression. Among the epigenetic factors are included the long noncoding RNAs (lncRNAs), transcripts of more than 200 nucleotides (nt) that generally do not code for proteins and have been associated with diverse functions such as the regulation of transcription, translation, RNA metabolism, as well as stem cell maintenance and differentiation, cell autophagy and apoptosis. Recently, studies have begun to characterize the aberrant regulation of lncRNAs in CC cells and tissues, including Homeobox transcript antisense RNA (HOTAIR), H19, Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1), Cervical Carcinoma High-Expressed 1 (CCHE1), Antisense noncoding RNA in the inhibitors of cyclin-dependent kinase 4 (ANRIL), Growth arrest special 5 (GAS5) and Plasmacytoma variant translocation 1 (PVT1). They have been associated with several disease-related processes such as cell growth, cell proliferation, cell survival, metastasis and invasion as well as therapeutic resistance, and are novel potential biomarkers for diagnosis and prognosis in CC. In this review, we summarize the current literature regarding the knowledge we have about the roles and mechanisms of the lncRNAs in cervical neoplasia.
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Affiliation(s)
- Miguel Ángel Cáceres-Durán
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém 66075-110, Brazil; (M.Á.C.-D.); (Â.R.-d.-S.)
| | - Ândrea Ribeiro-dos-Santos
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém 66075-110, Brazil; (M.Á.C.-D.); (Â.R.-d.-S.)
- Graduate Program in Oncology and Medical Sciences, Center of Oncology Researches, Federal University of Pará, Belém 66073-005, Brazil
| | - Amanda Ferreira Vidal
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém 66075-110, Brazil; (M.Á.C.-D.); (Â.R.-d.-S.)
- Correspondence: ; Tel.: +55-91-3201-7843
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Galvão MLTDC, Coimbra EC. Long noncoding RNAs (lncRNAs) in cervical carcinogenesis: New molecular targets, current prospects. Crit Rev Oncol Hematol 2020; 156:103111. [PMID: 33080526 DOI: 10.1016/j.critrevonc.2020.103111] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 07/15/2020] [Accepted: 09/09/2020] [Indexed: 12/11/2022] Open
Abstract
Aberrant expression of lncRNAs has been seen as a key factor in a wide range of diseases including cancer. The role of lncRNAs in cervical cancer has not been clearly explained, and has been the subject of recent studies. In this review, we have compiled an updated list of previously reported lncRNAs and established a general profile of these transcripts in accordance with the role they play in cervical carcinogenesis. Thus, information here includes the influence of lncRNAs on cervical tumorigenic process through a disturbance of cellular activities. Additionally, we described recent discoveries about how HPV contributes to lncRNAs expression in cervical cancer and we summarized exploratory studies of strategies adopted to modulate the expression levels of lncRNAs to treat cervical neoplasia, by drawing attention to radio and chemo-resistance. Finally, this paper provides a broad overview that sets out new research directions about the role of lncRNAs in cervical cancer.
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Affiliation(s)
- Maria Luiza Tabosa de Carvalho Galvão
- Faculty of Medical Sciences, University of Pernambuco, Brazil; Laboratory of Molecular Biology of Viruses, Biological Sciences Institute, University of Pernambuco, Brazil
| | - Eliane Campos Coimbra
- Laboratory of Molecular Biology of Viruses, Biological Sciences Institute, University of Pernambuco, Brazil.
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7
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Wan S, Zhao H. Analysis of diagnostic and prognostic value of lncRNA MEG3 in cervical cancer. Oncol Lett 2020; 20:183. [PMID: 32934750 DOI: 10.3892/ol.2020.12044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 05/06/2020] [Indexed: 02/06/2023] Open
Abstract
The present study aimed to explore the diagnostic and prognostic value of lncRNA maternally expressed 3 (MEG3) in cervical cancer. Eighty-four patients with cervical cancer from February 2013 to March 2014 were enrolled in the observation group (OG), and another 58 female subjects who underwent physical examination at Huangshi Central Hospital were enrolled as the control group (CG). The serum MEG3 expression of patients in the two groups was detected by RT-qPCR, and the ability of MEG3 to aid in the diagnosis of cervical cancer, lymph node metastasis and FIGO staging, as well as to predict mortality was evaluated by ROC curve. In addition, the patients in the OG were divided into high- and low-expression groups according to the median value of MEG3. Kaplan Meier was employed to analyze the survival status, and Cox regression to analyze the independent prognostic factors of cervical cancer patients. The results of the present study revealed that the serum MEG3 expression in the OG was significantly lower than that of the CG (P<0.05). The area under the curve (AUC) of MEG3 in diagnosing cervical cancer was 0.844, the AUC in predicting mortality was 0.858, while that in diagnosing lymph node transfer was 0.707, and that in diagnosing FIGO staging was 0.791. The 5-year survival rate of the high-expression group was higher than that of the low-expression group (P=0.020). Multivariate analysis indicated that MEG3 (HR, 0.173; 95 CI%, 0.028-0.919), lymph node metastasis (HR, 2.259; 95 CI%, 1.004-5.025) and FIGO staging (HR, 0.008; 95 CI%, 1.453-6.248) were independent prognostic factors for cervical cancer patients. Collectively, lncRNA MEG3 may be a diagnostic marker and prognostic indicator for cervical cancer, and has a certain diagnostic value for lymph node metastasis and FIGO staging. Lymph node metastasis, FIGO stage III and IV, and low MEG3 levels were revealed to be independent prognostic factors for cervical cancer patients.
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Affiliation(s)
- Shuqiong Wan
- Department of Obstetrics and Gynecology, Huangshi Central Hospital, Huangshi, Hubei 435000, P.R. China
| | - Huanqiu Zhao
- Department of Gynecology, Huangshi Maternity and Children's Health Hospital, Huangshi, Hubei 435000, P.R. China
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Bai X, Wang W, Zhao P, Wen J, Guo X, Shen T, Shen J, Yang X. LncRNA CRNDE acts as an oncogene in cervical cancer through sponging miR-183 to regulate CCNB1 expression. Carcinogenesis 2020; 41:111-121. [PMID: 31605132 DOI: 10.1093/carcin/bgz166] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 08/25/2019] [Accepted: 10/08/2019] [Indexed: 12/17/2022] Open
Abstract
Studies have identified a series of lncRNAs that contributed to various tumors, although the underlying mechanisms remain largely unclear. We proposed a ceRNA network and investigate relations among lncRNA/miRNA/mRNA in cervical cancer (CC). The genes of differential expression and lncRNA/miRNA/mRNA network were identified by combining TCGA, miRcode, starBase, miRTarBase, miRDB, TargetScan and STRING databases. Meanwhile, the function enrichment was recognized with Gene Ontology and Kyoto Encyclopedia of Genes and Genomes. Quantitative real time-PCR (qRT-PCR) was performed to determine colorectal neoplasia differentially expressed (CRNDE) expression in CC tissues and cell lines. The effects of CRNDE on the CC biological functions and cyclin B1 (CCNB1) expression were detected by conducting in vitro and in vivo experiments. Quantitative real time-PCR, western blot and dual-luciferase reporter assay were used to predict the target of miR-183. Furthermore, rescue experiments were conducted to further confirm the regulation of CCNB1 by CRNDE. Systematic analyses of bioinformatics from several databases predicted that CRNDE, miR-183 and CCNB1 were in the same network path. Their expressions were up-regulated in CC tissues and cells. Silencing CRNDE-inhibited cell proliferation, migration and invasion, restricted solid tumor growth and promoted cell apoptosis. Moreover, our results suggested that miR-183 targeted the CCNB1 3'UTR and regulated its expression. Additionally, miR-183 mimic could inverse the antitumor function of CRNDE inhibition and partially eliminated the attenuated expression of CCNB1 induced by silencing CRNDE, indicating that CRNDE could positively regulate CCNB1 expression by sponging miR-183. Our study highlighted a role for the CRNDE/miR-183/CCNB1-axis in CC and offered a promising diagnostic strategy for CC treatment.
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Affiliation(s)
- Xiaoxia Bai
- Department of Obstetrics, Women's Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Wendong Wang
- Hangzhou Guang Yu Yuan Medicine Technology Co, Ltd, Hangzou, China
| | - Peng Zhao
- Department of Obstetrics, Women's Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Jie Wen
- Department of Obstetrics, Women's Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Xuedong Guo
- Department of Obstetrics, Women's Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Tao Shen
- Department of Obstetrics, Women's Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Junhua Shen
- Department of Obstetrics, Women's Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Xiaofu Yang
- Department of Obstetrics, Women's Hospital, Medical School of Zhejiang University, Hangzhou, China
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Pan X, Cao YM, Liu JH, Ding J, Xie XY, Cao PG. MEG3 Induces Cervical Carcinoma Cells' Apoptosis Through Endoplasmic Reticulum Stress by miR-7-5p/STC1 Axis. Cancer Biother Radiopharm 2020; 36:501-510. [PMID: 32379497 DOI: 10.1089/cbr.2019.3344] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Background: Many patients with advanced cervical cancer (CC) have a poor prognosis and their mortality rank the first among women with malignant tumors. It's essential to explore the molecular mechanism of CC in clinical practice. Long noncoding RNA maternally expressed gene 3 (MEG3) has been reported to downregulate in CC tissues. However, the underlying mechanism of MEG3 in CC remains poorly elaborated. The current study aimed to explore the potential mechanism of MEG3 inducing endoplasmic reticulum stress (ERs)-mediated apoptosis of CC cells. Methods: The expression of MEG3 and miR-7-5p in CC tissues and cell lines was verified by quantitative reverse transcription/polymerase chain reaction (qRT-PCR). The vector of MEG3, miR-7-5p inhibitor, and sh-SCT1 were transfected into CC cell lines, and their expression was tested by qRT-PCR. Flow cytometry was used to detect apoptosis, and ERs-related protein expression was performed by Western blot. The regulatory relationship between MEG3/SCT1 and miR-7-5p was validated by Dual luciferase reporter assay. Results: CC tissues and cell lines showed downregulated MEG3 and STC1, and upregulated miR-7-5p. Overexpression of MEG3 or miR-7-5p inhibition induced ERs-triggered apoptosis of CC cells. In addition, sh-STC1 can reverse the effects of overexpressing MEG3 on CC cell apoptosis. In addition, dual luciferase reporter assay revealed that miR-7-5p can directly target to MEG3 and STC1. Conclusion: MEG3, act as a competing endogenous RNA of miR-7-5p, accelerates ERs-mediated apoptosis of CC cells through regulating SCT1 expression.
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Affiliation(s)
- Xi Pan
- Department of Oncology, The Third Xiangya Hospital of Central South University, Changsha, People's Republic of China
| | - Yan-Ming Cao
- Department of Oncology, The Third Xiangya Hospital of Central South University, Changsha, People's Republic of China
| | - Jian-Hao Liu
- School of Pharmaceutical Sciences of Central South University, Changsha, People's Republic of China
| | - Juan Ding
- Department of Oncology, The Third Xiangya Hospital of Central South University, Changsha, People's Republic of China
| | - Xue-Yi Xie
- Department of Oncology, The Third Xiangya Hospital of Central South University, Changsha, People's Republic of China
| | - Pei-Guo Cao
- Department of Oncology, The Third Xiangya Hospital of Central South University, Changsha, People's Republic of China
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Zuo S, Wu L, Wang Y, Yuan X. Long Non-coding RNA MEG3 Activated by Vitamin D Suppresses Glycolysis in Colorectal Cancer via Promoting c-Myc Degradation. Front Oncol 2020; 10:274. [PMID: 32219064 PMCID: PMC7078156 DOI: 10.3389/fonc.2020.00274] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 02/17/2020] [Indexed: 01/04/2023] Open
Abstract
Colorectal cancer (CRC), a common tumor, is characterized by a high mortality rate. Long non-coding RNA maternally expressed gene 3 (MEG3) serves a regulatory role in the carcinogenesis and progression of several types of cancer; however, its role in CRC remains largely unknown. The aim of this study was to explore the regulatory role and mechanism(s) of MEG3 in CRC. The Warburg effect or aerobic glycolysis is characteristic of the metabolism of tumor cells. To determine the effect of MEG3 on glycolysis of CRC cells, we used an XF analyzer to perform glycolysis stress test assays and found that overexpression of MEG3 significantly inhibited glycolysis, glycolytic capacity, as well as lactate production in CRC cells, whereas knockdown of MEG3 produced the opposite effect. Mechanistically, overexpression of MEG3 induced ubiquitin-dependent degradation of c-Myc and inhibited c-Myc target genes involved in the glycolysis pathway such as lactate dehydrogenase A, pyruvate kinase muscle 2, and hexokinase 2. Moreover, we found that MEG3 can be activated by vitamin D and vitamin D receptor (VDR). Clinical data demonstrated that MEG3 was positively associated with serum vitamin D concentrations in patients with CRC. We found that 1,25(OH)2D3 treatment increased MEG3 expression, and knockdown of VDR abolished the effect of MEG3 on glycolysis. These results indicate that vitamin D-activated MEG3 suppresses aerobic glycolysis in CRC cells via degradation of c-Myc. Thus, vitamin D may have therapeutic value in the treatment of CRC.
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Affiliation(s)
- Siyu Zuo
- Department of Anatomy, Histology, and Embryology, Nanjing Medical University, Nanjing, China
| | - Lei Wu
- Department of Clinical Medicine, First Clinical Medicine College, Nanjing Medical University, Nanjing, China
| | - Yi Wang
- Department of Anatomy, Histology, and Embryology, Nanjing Medical University, Nanjing, China
| | - Xiaoqin Yuan
- Department of Anatomy, Histology, and Embryology, Nanjing Medical University, Nanjing, China.,Key Laboratory for Aging and Disease, Nanjing Medical University, Nanjing, China
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11
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Yang Z, Bian E, Xu Y, Ji X, Tang F, Ma C, Wang H, Zhao B. Meg3 Induces EMT and Invasion of Glioma Cells via Autophagy. Onco Targets Ther 2020; 13:989-1000. [PMID: 32099402 PMCID: PMC6999788 DOI: 10.2147/ott.s239648] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 01/08/2020] [Indexed: 12/16/2022] Open
Abstract
Background Glioma is one of the most common malignant tumors. Glioblastoma (grade IV) is considered the most malignant form of human brain tumors. Maternal expression gene 3 (Meg3) encodes a non-coding RNA (ncRNA) that plays an important role in the development and progression of cancer. However, the role of Meg3 in glioma cells remains largely unclear. Methods Reverse transcription-quantitative (RT-q) PCR was conducted to evaluate the mRNA expression related to cell autophagy and EMT while protein expression was detected by Western blotting. Staining of acidic vacuoles and immunofluorescence staining were used to detect autophagy. The ability of cells to migrate and invade was detected by Transwell migration and invasion assays. Results In the present study, it was found that the overexpression of Meg3 induced EMT, migration and invasion of glioma cells, whereas Meg3 overexpression induced autophagy of glioma cells. More importantly, the inhibition of autophagy impaired the EMT of glioma cells. In addition, Meg3-induced EMT, migration and invasion could be partially reversed by autophagy inhibitors, chloroquine (CQ) and Lys05, in glioma cells. Conclusion All data suggest that Meg3 induces EMT and invasion of glioma cells via autophagy. Overall, the findings of the present study demonstrate the importance of Meg3 in the molecular etiology of glioma, which also indicate its potential applications in the treatment of glioma.
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Affiliation(s)
- Zhihao Yang
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, People's Republic of China.,Cerebral Vascular Disease Research Center, Anhui Medical University, Hefei 230601, People's Republic of China
| | - Erbao Bian
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, People's Republic of China.,Cerebral Vascular Disease Research Center, Anhui Medical University, Hefei 230601, People's Republic of China
| | - Yadi Xu
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, People's Republic of China.,Cerebral Vascular Disease Research Center, Anhui Medical University, Hefei 230601, People's Republic of China
| | - Xinghu Ji
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, People's Republic of China.,Cerebral Vascular Disease Research Center, Anhui Medical University, Hefei 230601, People's Republic of China
| | - Feng Tang
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, People's Republic of China.,Cerebral Vascular Disease Research Center, Anhui Medical University, Hefei 230601, People's Republic of China
| | - Chunchun Ma
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, People's Republic of China.,Cerebral Vascular Disease Research Center, Anhui Medical University, Hefei 230601, People's Republic of China
| | - Hongliang Wang
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, People's Republic of China.,Cerebral Vascular Disease Research Center, Anhui Medical University, Hefei 230601, People's Republic of China
| | - Bing Zhao
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, People's Republic of China.,Cerebral Vascular Disease Research Center, Anhui Medical University, Hefei 230601, People's Republic of China
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12
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Wang W, Xie Y, Chen F, Liu X, Zhong LL, Wang HQ, Li QC. LncRNA MEG3 acts a biomarker and regulates cell functions by targeting ADAR1 in colorectal cancer. World J Gastroenterol 2019; 25:3972-3984. [PMID: 31413531 PMCID: PMC6689807 DOI: 10.3748/wjg.v25.i29.3972] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 06/07/2019] [Accepted: 06/26/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Colorectal cancer (CRC) is the third most prevalent malignancy and has the fourth highest global cancer mortality rate. Early diagnosis and prompt medical attention can improve quality of life and the prognosis of CRC patients. Accumulating evidence reveals that long non-coding RNAs (lncRNAs) function as oncogenes or anti-oncogenes, as well as biomarkers in various cancers.
AIM To investigate the levels and molecular mechanism of the lncRNA maternally expressed gene 3 (MEG3) in CRC.
METHODS The levels of lncRNA MEG3 in CRC tissue, serum and cell line samples were explored via qRT-PCR. The relationship between MEG3 levels and clinicopathological features in CRC was investigated. The diagnostic and prognostic values of serum MEG3 levels were analyzed with ROC curves and Kaplan‑Meier survival curves, respectively.
RESULTS Significant decreased levels of MEG3 existed in CRC tissue, cell lines and serum. CRC patients with down-regulated serum MEG3 levels had larger tumor sizes, and advanced clinical stages. The sensitivity and specificity of serum MEG3 levels in CRC detection was 0.667 and 0.875, respectively. Tumor size, T stages, and serum MEG3 levels are indie factors that produce an effect on CRC patients' prognosis. Kaplan‑Meier survival curves suggested that CRC patients with high levels of MEG3 had a remarkably better overall survival rate.
CONCLUSION LncRNA MEG3 is down-regulated in CRC, and regulates cell functions by targeting adenosine deaminase’s effect on RNA 1 in CRC.
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Affiliation(s)
- Wei Wang
- College of Basic Medical Sciences, China medical University and Department of Pathology, the First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China
- Teaching and Research Department of Pathology, Basic Medical College, Heilongjiang University of Traditional Chinese Medicine, Harbin 150040, Heilongjiang Province, China
| | - Ying Xie
- Department of Synopsis of The Golden Chamber, School of Basic Medical Sciences, Heilongjiang University of Traditional Chinese Medicine, Harbin 150040, Heilongjiang Province, China
| | - Fei Chen
- Department of Synopsis of The Golden Chamber, School of Basic Medical Sciences, Heilongjiang University of Traditional Chinese Medicine, Harbin 150040, Heilongjiang Province, China
| | - Xu Liu
- Experiment and Training Center, Heilongjiang University of Traditional Chinese Medicine, Harbin 150040, Heilongjiang Province, China
| | - Li-Li Zhong
- Department of Pathology, the First Clinical Medical College, Heilongjiang University of Traditional Chinese Medicine, Harbin 150040, Heilongjiang Province, China
| | - Hai-Qiang Wang
- Department of Gastroenterology, the First Clinical Medical College, Heilongjiang University of Traditional Chinese Medicine, Harbin 150040, Heilongjiang Province, China
| | - Qing-Chang Li
- College of Basic Medical Sciences, China medical University and Department of Pathology, the First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China
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Maternally expressed gene 3 (MEG3): A tumor suppressor long non coding RNA. Biomed Pharmacother 2019; 118:109129. [PMID: 31326791 DOI: 10.1016/j.biopha.2019.109129] [Citation(s) in RCA: 115] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/10/2019] [Accepted: 06/12/2019] [Indexed: 12/12/2022] Open
Abstract
Maternally expressed gene 3 (MEG3) is a long non-coding RNA (lncRNA) located on chromosome 14q32.3. Direct sequencing experiments have shown monoallelic expression of this lncRNA. Several studies have shown down-regulation of this lncRNA in human cancers. In some cases, hypermethylation of the promoter region has been suggested as the underlying mechanism. Functional studies have shown that this lncRNA controls expression of several tumor suppressor genes and oncogenes among them are p53, RB, MYC and TGF-β. Through regulation of Wnt-β-catenin pathway, it also affects epithelial-mesenchymal transition. In vitro studies have demonstrated contribution of MEG3 in defining response to chemotherapeutic agents such as paclitaxel, cisplatin and oxaliplatin. Certain polymorphisms within MEG3 are implicated in cancer risk (rs7158663, rs4081134 and rs11160608) or therapeutic response of cancer patients (rs10132552). Taken together, this lncRNA is regarded as a putative cancer biomarker and treatment target. In the current review, several aspects of the participation of MEG3 in carcinogenesis are discussed.
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Meng D, Lei M, Han Y, Zhao D, Zhang X, Yang Y, Liu R. MicroRNA-645 targets urokinase plasminogen activator and decreases the invasive growth of MDA-MB-231 triple-negative breast cancer cells. Onco Targets Ther 2018; 11:7733-7743. [PMID: 30464522 PMCID: PMC6223385 DOI: 10.2147/ott.s187221] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Background Urokinase plasminogen activator (uPA) promotes the in vivo invasive growth of HCC cells by cleaving and activating matrix metalloproteinases (MMPs) to induce the destruction of the extracellular matrix of triple-negative breast cancer (TNBC) cells. The identification of microRNAs that target uPA and decrease uPA expression would be useful for attenuating the in vivo invasive growth of TNBC cells. Materials and methods MicroRNA-645 (miR-645) was identified using an online tool (miRDB) as potentially targeting uPA; miR-645 inhibition of uPA was confirmed by western blot experiments. The effects of miR-645 on the in vivo invasive growth of TNBC cells were examined using an intrahepatic tumor model in nude mice, and the miR-645 mechanism of action was explored with MMP cleaving experiments. Results Through virtual screening, we discovered that miR-645 potentially targeted the uPA 3′ untranslated region. This targeting was confirmed by western blot experiments and miR-645 lentiviral particle (LV-645) transduction that inhibited uPA expression in MDA-MB-231 TNBC cells. The LV-645 inhibition of uPA led to the decreased invasive growth of TNBC cells in nude mice. The mechanism data indicated that the uPA inhibition resulted in a decreased cleaving of the pro-MMP-9 protein. Conclusion Targeting uPA with miR-645 decreased the in vivo invasive growth of TNBC cells. These results suggest that miR-645 may represent a promising treatment strategy for TNBC.
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Affiliation(s)
- Du Meng
- Department of Radio Oncology, The First Affiliated Hospital of Xi'an Jiaotong University School of Medicine, Xi'an 710061, Shaanxi Province, People's Republic of China,
| | - Ming Lei
- Department of Cardiothoracic Surgery, The NO 3 Hospital of Xi'an, Xi'an 710000, Shaanxi Province, People's Republic of China
| | - Yaxuan Han
- Department of Oncology, The Xi'an Chest Hospital, Xi'an 710000, Shaanxi Province, People's Republic of China
| | - Dongli Zhao
- Department of Cardiothoracic Surgery, The NO 3 Hospital of Xi'an, Xi'an 710000, Shaanxi Province, People's Republic of China
| | - Xiaozhi Zhang
- Department of Radio Oncology, The First Affiliated Hospital of Xi'an Jiaotong University School of Medicine, Xi'an 710061, Shaanxi Province, People's Republic of China,
| | - Yunyi Yang
- Department of Radio Oncology, The First Affiliated Hospital of Xi'an Jiaotong University School of Medicine, Xi'an 710061, Shaanxi Province, People's Republic of China,
| | - Rui Liu
- Department of Radio Oncology, The First Affiliated Hospital of Xi'an Jiaotong University School of Medicine, Xi'an 710061, Shaanxi Province, People's Republic of China,
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