1
|
Qin S, Wang Y, Ma C, Lv Q. Competitive endogenous network of circRNA, lncRNA, and miRNA in osteosarcoma chemoresistance. Eur J Med Res 2023; 28:354. [PMID: 37717007 PMCID: PMC10504747 DOI: 10.1186/s40001-023-01309-x] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 08/23/2023] [Indexed: 09/18/2023] Open
Abstract
Osteosarcoma is the most prevalent and fatal type of bone tumor. Despite advancements in the treatment of other cancers, overall survival rates for patients with osteosarcoma have stagnated over the past four decades Multiple-drug resistance-the capacity of cancer cells to become simultaneously resistant to multiple drugs-remains a significant obstacle to effective chemotherapy. The recent studies have shown that noncoding RNAs can regulate the expression of target genes. It has been proposed that "competing endogenous RNA" activity forms a large-scale regulatory network across the transcriptome, playing important roles in pathological conditions such as cancer. Numerous studies have highlighted that circular RNAs (circRNAs) and long noncoding RNAs (lncRNAs) can bind to microRNA (miRNA) sites as competitive endogenous RNAs, thereby affecting and regulating the expression of mRNAs and target genes. These circRNA/lncRNA-associated competitive endogenous RNAs are hypothesized to play significant roles in cancer initiation and progression. Noncoding RNAs (ncRNAs) play an important role in tumor resistance to chemotherapy. However, the molecular mechanisms of the lncRNA/circRNA-miRNA-mRNA competitive endogenous RNA network in drug resistance of osteosarcoma remain unclear. An in-depth study of the molecular mechanisms of drug resistance in osteosarcoma and the elucidation of effective intervention targets are of great significance for improving the overall recovery of patients with osteosarcoma. This review focuses on the molecular mechanisms underlying chemotherapy resistance in osteosarcoma in circRNA-, lncRNA-, and miRNA-mediated competitive endogenous networks.
Collapse
Affiliation(s)
- Shuang Qin
- Department of Medical Imaging, Tongji Hospital, Tongji University School of Medicine, Xincun Road No. 389, Shanghai, 200065, China
| | - Yuting Wang
- Department of Medical Imaging, Tongji Hospital, Tongji University School of Medicine, Xincun Road No. 389, Shanghai, 200065, China
| | - Chunhui Ma
- Department of Orthopedics, Shanghai General Hospital of Shanghai Jiaotong University, Wujin Road No. 85, Shanghai, 200080, China.
| | - Qi Lv
- Department of Medical Imaging, Tongji Hospital, Tongji University School of Medicine, Xincun Road No. 389, Shanghai, 200065, China.
| |
Collapse
|
2
|
Zhao S, Ly A, Mudd JL, Rozycki EB, Webster J, Coonrod E, Othoum G, Luo J, Dang H, Fields RC, Maher C. Characterization of cell-type specific circular RNAs associated with colorectal cancer metastasis. NAR Cancer 2023; 5:zcad021. [PMID: 37213253 PMCID: PMC10198730 DOI: 10.1093/narcan/zcad021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 05/02/2023] [Accepted: 05/16/2023] [Indexed: 05/23/2023] Open
Abstract
Colorectal cancer (CRC) is the most common gastrointestinal malignancy and a leading cause of cancer deaths in the United States. More than half of CRC patients develop metastatic disease (mCRC) with an average 5-year survival rate of 13%. Circular RNAs (circRNAs) have recently emerged as important tumorigenesis regulators; however, their role in mCRC progression remains poorly characterized. Further, little is known about their cell-type specificity to elucidate their functions in the tumor microenvironment (TME). To address this, we performed total RNA sequencing (RNA-seq) on 30 matched normal, primary and metastatic samples from 14 mCRC patients. Additionally, five CRC cell lines were sequenced to construct a circRNA catalog in CRC. We detected 47 869 circRNAs, with 51% previously unannotated in CRC and 14% novel candidates when compared to existing circRNA databases. We identified 362 circRNAs differentially expressed in primary and/or metastatic tissues, termed circular RNAs associated with metastasis (CRAMS). We performed cell-type deconvolution using published single-cell RNA-seq datasets and applied a non-negative least squares statistical model to estimate cell-type specific circRNA expression. This predicted 667 circRNAs as exclusively expressed in a single cell type. Collectively, this serves as a valuable resource, TMECircDB (accessible at https://www.maherlab.com/tmecircdb-overview), for functional characterization of circRNAs in mCRC, specifically in the TME.
Collapse
Affiliation(s)
- Sidi Zhao
- Department of Internal Medicine, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Amy Ly
- Department of Internal Medicine, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Jacqueline L Mudd
- Department of Surgery, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Emily B Rozycki
- Department of Internal Medicine, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Jace Webster
- Department of Internal Medicine, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Emily Coonrod
- Department of Internal Medicine, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Ghofran Othoum
- Department of Internal Medicine, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Jingqin Luo
- Alvin J. Siteman Cancer Center, Washington University School of Medicine, St Louis, MO 63108, USA
- Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Ha X Dang
- Department of Internal Medicine, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Ryan C Fields
- Alvin J. Siteman Cancer Center, Washington University School of Medicine, St Louis, MO 63108, USA
- Department of Surgery, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Christopher A Maher
- Department of Internal Medicine, Washington University School of Medicine, St Louis, MO 63108, USA
- Alvin J. Siteman Cancer Center, Washington University School of Medicine, St Louis, MO 63108, USA
- Department of Biomedical Engineering, Washington University School of Medicine, St Louis, MO 63108, USA
| |
Collapse
|
3
|
Novoa Díaz MB, Carriere P, Gentili C. How the interplay among the tumor microenvironment and the gut microbiota influences the stemness of colorectal cancer cells. World J Stem Cells 2023; 15:281-301. [PMID: 37342226 PMCID: PMC10277969 DOI: 10.4252/wjsc.v15.i5.281] [Citation(s) in RCA: 1] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 03/06/2023] [Accepted: 04/17/2023] [Indexed: 05/26/2023] Open
Abstract
Colorectal cancer (CRC) remains the third most prevalent cancer disease and involves a multi-step process in which intestinal cells acquire malignant characteristics. It is well established that the appearance of distal metastasis in CRC patients is the cause of a poor prognosis and treatment failure. Nevertheless, in the last decades, CRC aggressiveness and progression have been attributed to a specific cell population called CRC stem cells (CCSC) with features like tumor initiation capacity, self-renewal capacity, and acquired multidrug resistance. Emerging data highlight the concept of this cell subtype as a plastic entity that has a dynamic status and can be originated from different types of cells through genetic and epigenetic changes. These alterations are modulated by complex and dynamic crosstalk with environmental factors by paracrine signaling. It is known that in the tumor niche, different cell types, structures, and biomolecules coexist and interact with cancer cells favoring cancer growth and development. Together, these components constitute the tumor microenvironment (TME). Most recently, researchers have also deepened the influence of the complex variety of microorganisms that inhabit the intestinal mucosa, collectively known as gut microbiota, on CRC. Both TME and microorganisms participate in inflammatory processes that can drive the initiation and evolution of CRC. Since in the last decade, crucial advances have been made concerning to the synergistic interaction among the TME and gut microorganisms that condition the identity of CCSC, the data exposed in this review could provide valuable insights into the biology of CRC and the development of new targeted therapies.
Collapse
Affiliation(s)
- María Belén Novoa Díaz
- Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca 8000, Buenos Aires, Argentina
- Instituto de Ciencias Biológicas y Biomédicas del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)- Universidad Nacional del Sur (UNS), Bahía Blanca 8000, Buenos Aires, Argentina
| | - Pedro Carriere
- Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca 8000, Buenos Aires, Argentina
- Instituto de Ciencias Biológicas y Biomédicas del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)- Universidad Nacional del Sur (UNS), Bahía Blanca 8000, Buenos Aires, Argentina
| | - Claudia Gentili
- Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca 8000, Buenos Aires, Argentina
- Instituto de Ciencias Biológicas y Biomédicas del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)- Universidad Nacional del Sur (UNS), Bahía Blanca 8000, Buenos Aires, Argentina
| |
Collapse
|
4
|
Volovat SR, Augustin I, Zob D, Boboc D, Amurariti F, Volovat C, Stefanescu C, Stolniceanu CR, Ciocoiu M, Dumitras EA, Danciu M, Apostol DGC, Drug V, Shurbaji SA, Coca LG, Leon F, Iftene A, Herghelegiu PC. Use of Personalized Biomarkers in Metastatic Colorectal Cancer and the Impact of AI. Cancers (Basel) 2022; 14:cancers14194834. [PMID: 36230757 PMCID: PMC9562853 DOI: 10.3390/cancers14194834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 09/18/2022] [Accepted: 09/29/2022] [Indexed: 12/09/2022] Open
Abstract
Colorectal cancer is a major cause of cancer-related death worldwide and is correlated with genetic and epigenetic alterations in the colonic epithelium. Genetic changes play a major role in the pathophysiology of colorectal cancer through the development of gene mutations, but recent research has shown an important role for epigenetic alterations. In this review, we try to describe the current knowledge about epigenetic alterations, including DNA methylation and histone modifications, as well as the role of non-coding RNAs as epigenetic regulators and the prognostic and predictive biomarkers in metastatic colorectal disease that can allow increases in the effectiveness of treatments. Additionally, the intestinal microbiota’s composition can be an important biomarker for the response to strategies based on the immunotherapy of CRC. The identification of biomarkers in mCRC can be enhanced by developing artificial intelligence programs. We present the actual models that implement AI technology as a bridge connecting ncRNAs with tumors and conducted some experiments to improve the quality of the model used as well as the speed of the model that provides answers to users. In order to carry out this task, we implemented six algorithms: the naive Bayes classifier, the random forest classifier, the decision tree classifier, gradient boosted trees, logistic regression and SVM.
Collapse
Affiliation(s)
- Simona-Ruxandra Volovat
- Department of Medical Oncology-Radiotherapy, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Str., 700115 Iasi, Romania
| | - Iolanda Augustin
- Department of Medical Oncology, AI.Trestioreanu Institute of Oncology, 022328 Bucharest, Romania
| | - Daniela Zob
- Department of Medical Oncology, AI.Trestioreanu Institute of Oncology, 022328 Bucharest, Romania
| | - Diana Boboc
- Department of Medical Oncology-Radiotherapy, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Str., 700115 Iasi, Romania
| | - Florin Amurariti
- Department of Medical Oncology-Radiotherapy, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Str., 700115 Iasi, Romania
| | - Constantin Volovat
- Department of Medical Oncology, “Euroclinic” Center of Oncology, 2 Vasile Conta Str., 700106 Iasi, Romania
- Correspondence: (C.V.); (C.S.)
| | - Cipriana Stefanescu
- Department of Biophysics and Medical Physics-Nuclear Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Str., 700115 Iasi, Romania
- Correspondence: (C.V.); (C.S.)
| | - Cati Raluca Stolniceanu
- Department of Biophysics and Medical Physics-Nuclear Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Str., 700115 Iasi, Romania
| | - Manuela Ciocoiu
- Department of Pathophysiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Eduard Alexandru Dumitras
- Department of Pathophysiology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
- Department of Anesthesiology and Intensive Care, Regional Institute of Oncology, 700115 Iasi, Romania
| | - Mihai Danciu
- Pathology Department, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | | | - Vasile Drug
- Department of Gastroenterology, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Str., 700115 Iasi, Romania
- Gastroenterology Clinic, Institute of Gastroenterology and Hepatology, ‘St. Spiridon’ Clinical Hospital, 700115 Iasi, Romania
| | - Sinziana Al Shurbaji
- Gastroenterology Clinic, Institute of Gastroenterology and Hepatology, ‘St. Spiridon’ Clinical Hospital, 700115 Iasi, Romania
| | - Lucia-Georgiana Coca
- Faculty of Computer Science, Alexandru Ioan Cuza University, 700115 Iasi, Romania
| | - Florin Leon
- Faculty of Automatic Control and Computer Engineering, Gheorghe Asachi Technical University, 700115 Iasi, Romania
| | - Adrian Iftene
- Faculty of Computer Science, Alexandru Ioan Cuza University, 700115 Iasi, Romania
| | - Paul-Corneliu Herghelegiu
- Faculty of Automatic Control and Computer Engineering, Gheorghe Asachi Technical University, 700115 Iasi, Romania
| |
Collapse
|
5
|
Wei S, Hu W, Feng J, Geng Y. Promotion or remission: a role of noncoding RNAs in colorectal cancer resistance to anti-EGFR therapy. Cell Commun Signal 2022; 20:150. [PMID: 36131281 PMCID: PMC9490904 DOI: 10.1186/s12964-022-00960-x] [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: 06/02/2022] [Accepted: 08/16/2022] [Indexed: 11/10/2022] Open
Abstract
Anti-epidermal-growth-factor-receptor (EGFR) monoclonal antibodies (mAbs) are of great significance for RAS and BRAF wild-type metastatic colorectal cancer (mCRC) patients. However, the generation of primary and secondary resistance to anti-EGFR mAbs has become an important factor restricting its efficacy. Recent studies have revealed that non-coding RNAs (ncRNAs), especially long non-coding RNAs (lncRNAs), microRNAs (miRNAs), and circular RNAs (circRNAs), are implicated in anti-EGFR antibodies resistance, affecting the sensitivity of CRC cells to Cetuximab and Panitumumab. This paper briefly reviewed the research advance of the expression, signaling network and functional mechanism of ncRNAs related to anti-EGFR mAbs resistance in CRC, as well as their relationship with clinical prognosis and the possibility of therapeutic targets. In addition, some ncRNAs that are involved in the regulation of signaling pathways or genes related to anti-EGFR resistance, but need to be further verified by resistance experiments were also included in this review, thereby providing more ideas and basis for ncRNAs as CRC prognostic markers and anti-EGFR therapy sensitizers. Video Abstract.
Collapse
Affiliation(s)
- Shanshan Wei
- Department of Oncology, The Third Affiliated Hospital of Soochow University, 185 Juqian Street, Changzhou, 213003, Jiangsu, China
| | - Wenwei Hu
- Department of Oncology, The Third Affiliated Hospital of Soochow University, 185 Juqian Street, Changzhou, 213003, Jiangsu, China.,Jiangsu Engineering Research Center for Tumor Immunotherapy, The Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Jun Feng
- Department of Oncology, The Third Affiliated Hospital of Soochow University, 185 Juqian Street, Changzhou, 213003, Jiangsu, China
| | - Yiting Geng
- Department of Oncology, The Third Affiliated Hospital of Soochow University, 185 Juqian Street, Changzhou, 213003, Jiangsu, China.
| |
Collapse
|
6
|
Sattar RSA, Verma R, Nimisha, Kumar A, Dar GM, Apurva, Sharma AK, Kumari I, Ahmad E, Ali A, Mahajan B, Saluja SS. Diagnostic and prognostic biomarkers in colorectal cancer and the potential role of exosomes in drug delivery. Cell Signal 2022; 99:110413. [PMID: 35907519 DOI: 10.1016/j.cellsig.2022.110413] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 07/13/2022] [Accepted: 07/15/2022] [Indexed: 11/03/2022]
Abstract
Colorectal cancer (CRC) is third most common cancer with second most common cause of death worldwide. One fourth to one fifth of the CRC cases are detected at advance stage. Early detection of colorectal cancer might help in decreasing mortality and morbidity worldwide. CRC being a heterogeneous disease, new non-invasive approaches are needed to complement and improve the screening and management of CRC. Reliable and early detectable biomarkers would improve diagnosis, prognosis, therapeutic responses, and will enable the prediction of drug response and recurrence risk. Over the past decades molecular research has demonstrated the potentials of CTCs, ctDNAs, circulating mRNA, ncRNAs, and exosomes as tumor biomarkers. Non-invasive screening approaches using fecal samples for identification of altered gut microbes in CRC is also gaining attention. Exosomes can be potential candidates that can be employed in the drug delivery system. Further, the integration of in vitro, in vivo and in silico models that involve CRC biomarkers will help to understand the interactions occurring at the cellular level. This review summarizes recent update on CRC biomarkers and their application along with the nanoparticles followed by the application of organoid culture in CRC.
Collapse
Affiliation(s)
- Real Sumayya Abdul Sattar
- Central Molecular Laboratory, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research (GIPMER), New Delhi, India
| | - Renu Verma
- Central Molecular Laboratory, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research (GIPMER), New Delhi, India
| | - Nimisha
- Central Molecular Laboratory, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research (GIPMER), New Delhi, India
| | - Arun Kumar
- Central Molecular Laboratory, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research (GIPMER), New Delhi, India
| | - Ghulam Mehdi Dar
- Central Molecular Laboratory, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research (GIPMER), New Delhi, India
| | - Apurva
- Central Molecular Laboratory, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research (GIPMER), New Delhi, India
| | - Abhay Kumar Sharma
- Central Molecular Laboratory, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research (GIPMER), New Delhi, India
| | - Indu Kumari
- Central Molecular Laboratory, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research (GIPMER), New Delhi, India
| | - Ejaj Ahmad
- Central Molecular Laboratory, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research (GIPMER), New Delhi, India
| | - Asgar Ali
- Central Molecular Laboratory, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research (GIPMER), New Delhi, India
| | - Bhawna Mahajan
- Central Molecular Laboratory, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research (GIPMER), New Delhi, India; Department of Biochemistry, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research (GIPMER), New Delhi, India
| | - Sundeep Singh Saluja
- Central Molecular Laboratory, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research (GIPMER), New Delhi, India; Department of GI Surgery, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research (GIPMER), New Delhi, India.
| |
Collapse
|
7
|
Lee YC, Wang WY, Lin HH, Huang YR, Lin YC, Hsiao KY. The Functional Roles and Regulation of Circular RNAs during Cellular Stresses. Noncoding RNA 2022; 8:ncrna8030038. [PMID: 35736635 PMCID: PMC9228399 DOI: 10.3390/ncrna8030038] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/19/2022] [Accepted: 05/26/2022] [Indexed: 11/16/2022] Open
Abstract
Circular RNAs (circRNAs) are a novel class of regulatory RNA involved in many biological, physiological and pathological processes by functioning as a molecular sponge, transcriptional/epigenetic/splicing regulator, modulator of protein–protein interactions, and a template for encoding proteins. Cells are constantly dealing with stimuli from the microenvironment, and proper responses rely on both the precise control of gene expression networks and protein–protein interactions at the molecular level. The critical roles of circRNAs in the regulation of these processes have been heavily studied in the past decades. However, how the microenvironmental stimulation controls the circRNA biogenesis, cellular shuttling, translation efficiency and degradation globally and/or individually remains largely uncharacterized. In this review, how the impact of major microenvironmental stresses on the known transcription factors, splicing modulators and epitranscriptomic regulators, and thereby how they may contribute to the regulation of circRNAs, is discussed. These lines of evidence will provide new insight into how the biogenesis and functions of circRNA can be precisely controlled and targeted for treating human diseases.
Collapse
Affiliation(s)
- Yueh-Chun Lee
- Department of Radiation Oncology, Chung Shan Medical University Hospital, Taichung 40201, Taiwan;
- School of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan
| | - Wei-Yu Wang
- Division of Hemato-Oncology, Department of Internal Medicine, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chia-Yi City 60002, Taiwan;
| | - Hui-Hsuan Lin
- Ph.D. Program in Tissue Engineering and Regenerative Medicine, National Chung Hsing University, Taichung 40227, Taiwan;
| | - Yi-Ren Huang
- Institute of Biochemistry, College of Life Sciences, National Chung Hsing University, Taichung 40227, Taiwan;
| | - Ya-Chi Lin
- Department of Plant Pathology, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung 40227, Taiwan;
- Department of Medical Laboratory Science and Biotechnology, Asia University, Taichung 41354, Taiwan
| | - Kuei-Yang Hsiao
- Ph.D. Program in Tissue Engineering and Regenerative Medicine, National Chung Hsing University, Taichung 40227, Taiwan;
- Institute of Biochemistry, College of Life Sciences, National Chung Hsing University, Taichung 40227, Taiwan;
- Ph.D. Program in Translational Medicine, College of Life Sciences, National Chung Hsing University, Taichung 40227, Taiwan
- Rong Hsing Research Center for Translational Medicine, College of Life Sciences, National Chung Hsing University, Taichung 40227, Taiwan
- Bachelor Program of Biotechnology, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung 40227, Taiwan
- Correspondence: ; Tel.: +886-42-284-0468 (ext. 8433)
| |
Collapse
|
8
|
Li J, Sun J, Liu Z, Zeng Z, Ouyang S, Zhang Z, Ma M, Kang W. The Roles of Non-Coding RNAs in Radiotherapy of Gastrointestinal Carcinoma. Front Cell Dev Biol 2022; 10:862563. [PMID: 35517505 PMCID: PMC9065280 DOI: 10.3389/fcell.2022.862563] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 03/22/2022] [Indexed: 12/19/2022] Open
Abstract
Radiotherapy (RT), or radiation therapy, has been widely used in clinical practice for the treatment of local advanced gastrointestinal carcinoma. RT causes DNA double-strand breaks leading to cell cytotoxicity and indirectly damages tumor cells by activating downstream genes. Non-coding RNA (including microRNAs, long non-coding RNAs (ncRNAs), and circular RNAs) is a type of RNA that does not encode a protein. As the field of ncRNAs increasingly expands, new complex roles have gradually emerged for ncRNAs in RT. It has been shown that ncRNAs can act as radiosensitivity regulators in gastrointestinal carcinoma by affecting DNA damage repair, cell cycle arrest, irradiation-induced apoptosis, cell autophagy, stemness, EMT, and cell pyroptosis. Here, we review the complex roles of ncRNAs in RT and gastrointestinal carcinoma. We also discuss the potential clinical significance and predictive value of ncRNAs in response to RT for guiding the individualized treatment of patients. This review can serve as a guide for the application of ncRNAs as radiosensitivity enhancers, radioresistance inducers, and predictors of response in RT of gastrointestinal carcinoma.
Collapse
|
9
|
Huang H, Yan L, Zhong J, Hong L, Zhang N, Luo X. Circ_0025033 deficiency suppresses paclitaxel resistance and malignant development of paclitaxel-resistant ovarian cancer cells by modulating the miR-532-3p/FOXM1 network. Immunopharmacol Immunotoxicol 2022; 44:275-286. [PMID: 35196944 DOI: 10.1080/08923973.2022.2038194] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Ovarian cancer (OC) is the main cause of cancer-related death in women, and drug resistance is a leading cause of treatment failure. Recently, the involvement of circular RNAs (circRNAs) in cancer progression has become an area of increased investigation. The objective of this study is to uncover the function and regulatory mechanism of circ_0025033 in paclitaxel (PTX)-resistant OC cells. METHODS The expression of circ_0025033, FOXM1 and miR-532-3p was investigated using quantitative real-time polymerase chain reaction (qRT-PCR), and the protein expression of FOXM1 was quantified by western blot. Cell biological functions, including cell viability, migration/invasion and apoptosis, were explored using 3-(4, 5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assays, transwell assays and flow cytometry assays. The interaction between miR-532-3p and circ_0025033 or FOXM1 predicted by bioinformatics analysis was validated by pull-down assay and dual-luciferase reporter assay. Exosomes were isolated to determine the further function of circ_0025033. RESULT Circ_0025033 and FOXM1 were highly expressed, while miR-532-3p was poorly expressed in OC tissues and cells, and the expression pattern was greater in PTX-resistant OC cells. Circ_0025033 knockdown lessened PTX resistance, suppressed migration/invasion and promoted apoptosis of PTX-resistant cells. With respect to mechanism, circ_0025033 upregulated the expression of FOXM1 by targeting miR-532-3p, and circ_0025033 knockdown blocked the malignant activities of PTX-resistant OC cells by enriching miR-532-3p and suppressing FOXM1. Exosomes derived from PTX-resistant cells with circ_0025033 knockdown also could repress the malignant actions of PTX-resistant OC cells. CONCLUSION Circ_0025033 downregulation impaired PTX resistance and malignant activities of PTX-resistant OC cells by regulating the miR-532-3p/FOXM1 network.
Collapse
Affiliation(s)
- Hao Huang
- Department of Obstetrics and Gynecology, First Affiliated Hospital of Jinan University, Guangzhou, P. R. China
| | - Luchun Yan
- Department of Obstetrics and Gynecology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, P. R. China
| | - Jun Zhong
- Department of Obstetrics and Gynecology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, P. R. China
| | - Longnian Hong
- Department of Obstetrics and Gynecology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, P. R. China
| | - Na Zhang
- Department of Obstetrics and Gynecology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, P. R. China
| | - Xiping Luo
- Department of Gynecology, Guangdong Women and Children Hospital, Guangzhou, P. R. China
| |
Collapse
|
10
|
Chu J, Fang X, Sun Z, Gai L, Dai W, Li H, Yan X, Du J, Zhang L, Zhao L, Xu D, Yan S. Non-Coding RNAs Regulate the Resistance to Anti-EGFR Therapy in Colorectal Cancer. Front Oncol 2022; 11:801319. [PMID: 35111681 PMCID: PMC8802825 DOI: 10.3389/fonc.2021.801319] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 10/25/2021] [Accepted: 12/20/2021] [Indexed: 12/12/2022] Open
Abstract
Colorectal cancer (CRC) is the third prevalent cancer worldwide, the morbidity and mortality of which have been increasing in recent years. As molecular targeting agents, anti-epidermal growth factor receptor (EGFR) monoclonal antibodies (McAbs) have significantly increased the progression-free survival (PFS) and overall survival (OS) of metastatic CRC (mCRC) patients. Nevertheless, most patients are eventually resistant to anti-EGFR McAbs. With the intensive study of the mechanism of anti-EGFR drug resistance, a variety of biomarkers and pathways have been found to participate in CRC resistance to anti-EGFR therapy. More and more studies have implicated non-coding RNAs (ncRNAs) primarily including microRNAs (miRNAs), long non-coding RNAs (lncRNAs), and circular RNAs (circRNAs), are widely involved in tumorigenesis and tumor progression. They function as essential regulators controlling the expression and function of oncogenes. Increasing data have shown ncRNAs affect the resistance of molecular targeted drugs in CRC including anti-EGFR McAbs. In this paper, we have reviewed the advance in mechanisms of ncRNAs in regulating anti-EGFR McAbs therapy resistance in CRC. It provides insight into exploring ncRNAs as new molecular targets and prognostic markers for CRC.
Collapse
Affiliation(s)
- Jinjin Chu
- Central Laboratory of the First Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Xianzhu Fang
- Department of Pathology and Pathophysiology, Weifang Medical University, Weifang, China
| | - Zhonghou Sun
- Department of Pediatrics of the First Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Linlin Gai
- Central Laboratory of the First Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Wenqing Dai
- Central Laboratory of the First Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Haibo Li
- Central Laboratory of the First Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Xinyi Yan
- Central Laboratory of the First Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Jinke Du
- Central Laboratory of the First Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Lili Zhang
- Central Laboratory of the First Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Lu Zhao
- Central Laboratory of the First Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Donghua Xu
- Central Laboratory of the First Affiliated Hospital, Weifang Medical University, Weifang, China
| | - Shushan Yan
- Department of Gastrointestinal and Anal Diseases Surgery of the Affiliated Hospital, Weifang Medical University, Weifang, China
| |
Collapse
|
11
|
Zhu G, Chang X, Kang Y, Zhao X, Tang X, Ma C, Fu S. CircRNA: A novel potential strategy to treat thyroid cancer (Review). Int J Mol Med 2021; 48:201. [PMID: 34528697 PMCID: PMC8480381 DOI: 10.3892/ijmm.2021.5034] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [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: 06/07/2021] [Accepted: 09/02/2021] [Indexed: 12/12/2022] Open
Abstract
Thyroid cancer (TC) is the most common type of endocrine cancer. Over the last 50 years, the global incidence of TC has been increasing. The survival rate of TC is higher than that of most other types of cancer, but it depends on numerous factors, including the specific type of TC and stage of the disease. Circular RNAs (circRNAs) are a new class of long noncoding RNA with a closed loop structure that have a critical role in the complex gene regulatory network that controls the emergence of TC. The most important function of circRNAs is their ability to specifically bind to microRNAs. In addition, the biological functions of circRNAs also include interactions with proteins, regulation of the transcription of genes and acting as translation templates. Based on the characteristics of circRNAs, they have been identified as potential biomarkers for the diagnosis of tumors. In the present review, the function and significance of circRNAs and their potential clinical implications for TC were summarized. Furthermore, possible treatment approaches involving the use of mesenchymal stem cells (MSCs) and exosomes derived from MSCs as carriers to load and transport circRNAs were discussed.
Collapse
Affiliation(s)
- Guomao Zhu
- Endocrinology Department, The First Hospital of Lanzhou University, Lanzhou, Gansu 730030, P.R. China
| | - Xingyu Chang
- Endocrinology Department, The First Hospital of Lanzhou University, Lanzhou, Gansu 730030, P.R. China
| | - Yuchen Kang
- The Second Clinical Medical College, Lanzhou University, Lanzhou, Gansu 730030, P.R. China
| | - Xinzhu Zhao
- Endocrinology Department, The First Hospital of Lanzhou University, Lanzhou, Gansu 730030, P.R. China
| | - Xulei Tang
- Endocrinology Department, The First Hospital of Lanzhou University, Lanzhou, Gansu 730030, P.R. China
| | - Chengxu Ma
- Endocrinology Department, The First Hospital of Lanzhou University, Lanzhou, Gansu 730030, P.R. China
| | - Songbo Fu
- Endocrinology Department, The First Hospital of Lanzhou University, Lanzhou, Gansu 730030, P.R. China
| |
Collapse
|
12
|
Ameli-Mojarad M, Ameli-Mojarad M, Hadizadeh M, Young C, Babini H, Nazemalhosseini-Mojarad E, Bonab MA. The effective function of circular RNA in colorectal cancer. Cancer Cell Int 2021; 21:496. [PMID: 34535136 PMCID: PMC8447721 DOI: 10.1186/s12935-021-02196-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 07/15/2021] [Accepted: 09/03/2021] [Indexed: 01/04/2023] Open
Abstract
Colorectal cancer (CRC) is the 3rd most common type of cancer worldwide. Late detection plays role in one-third of annual mortality due to CRC. Therefore, it is essential to find a precise and optimal diagnostic and prognostic biomarker for the identification and treatment of colorectal tumorigenesis. Covalently closed, circular RNAs (circRNAs) are a class of non-coding RNAs, which can have the same function as microRNA (miRNA) sponges, as regulators of splicing and transcription, and as interactors with RNA-binding proteins (RBPs). Therefore, circRNAs have been investigated as specific targets for diagnostic and prognostic detection of CRC. These non-coding RNAs are also linked to metastasis, proliferation, differentiation, migration, angiogenesis, apoptosis, and drug resistance, illustrating the importance of understanding their involvement in the molecular mechanisms of development and progression of CRC. In this review, we present a detailed summary of recent findings relating to the dysregulation of circRNAs and their potential role in CRC.
Collapse
Affiliation(s)
| | - Melika Ameli-Mojarad
- Department of Biology, Faculty of Basic Science, Kharrazi University, Tehran, Iran
| | - Mahrooyeh Hadizadeh
- School of Medicine, University of Sunderland, City Campus, Chester Road, Sunderland, SR1 3SD UK
| | - Chris Young
- Institute of Health & Life Sciences, De Montfort University, Leicester, UK
| | - Hosna Babini
- Department of Cell & Molecular Biology, Faculty of Science, Tehran University of Medical Science, Tehran, Iran
| | - Ehsan Nazemalhosseini-Mojarad
- Gastroenterology and Liver Disease Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maziar Ashrafian Bonab
- School of Medicine, University of Sunderland, City Campus, Chester Road, Sunderland, SR1 3SD UK
| |
Collapse
|
13
|
Abstract
Circular RNA (circRNA) is a type of endogenous, high‑stability, noncoding RNA. circRNAs exhibit various biological functions, and are involved in physiological and pathological processes occurring in various diseases, including cancers. They can not only act as microRNA and protein sponges, but also interact with proteins, translated peptides, and transcriptional and translational regulators, and compete with pre‑mRNA splicing. Chemotherapy is one of the most important types of cancer treatment. However, the resistance of cancer cells to chemotherapy is a leading reason for the failure of chemotherapy. It has been reported that circRNAs play important roles in cancer resistance via a number of mechanisms. The functions of the circRNAs provide insight into their roles in chemoresistance pathways. In addition, some circRNAs may serve as novel biomarkers for the diagnosis and prognosis of cancer resistance. Obtaining improved understanding of the molecular regulatory networks featuring circRNAs in tumors and searching for markers for the diagnosis and treatment of cancer resistance are leading issues in circRNA research. The present review introduced the functions of circRNAs, illustrated the mechanisms underlying drug resistance in cancer, described the contributions of circRNAs to this resistance and discussed the potential application of circRNAs in the treatment of drug‑resistant cancer. In particular, the review aimed to reveal the main mechanisms of circRNAs in cancer drug resistance, including mechanisms involving drug transport and metabolism, alterations of drug targets, DNA damage repair, downstream resistance mechanisms, adaptive responses and the tumor microenvironment. The findings may provide novel therapeutic targets for clinical treatment of cancer chemoresistance.
Collapse
Affiliation(s)
- Chuan Xin
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Fei Huang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Jiongke Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Jing Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Qianming Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| |
Collapse
|
14
|
He X, Ma J, Zhang M, Cui J, Yang H. Circ_0007031 enhances tumor progression and promotes 5-fluorouracil resistance in colorectal cancer through regulating miR-133b/ABCC5 axis. Cancer Biomark 2021; 29:531-542. [PMID: 32865180 DOI: 10.3233/cbm-200023] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Colorectal cancer (CRC) remains one of the most commonly diagnosed malignancies worldwide. Circular RNAs (circRNAs) are being found to play crucial roles in human cancer, including CRC. The purpose of this study was to explore the function and mechanism of circ_0007031 on CRC progression and 5-fluorouracil (5-FU) resistance. The levels of circ_0007031, ATP-binding cassette subfamily C member 5 (ABCC5) and miR-133b were assessed by quantitative real-time polymerase chain reaction (qRT-PCR) or western blot. Cell survival and proliferation were detected by the 3-(4,5-dimethylthiazol-2yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) assay. Cell colony formation was evaluated using a standard colony formation assay. Transwell assays were performed to determine cell migration and invasion. Targeted correlations among circ_0007031, miR-133b and ABCC5 were verified by dual-luciferase reporter, RNA immunoprecipitation (RIP) and RNA pulldown assays. Animal experiments were performed to observe the role of circ_0007031 in vivo. Our data indicated that circ_0007031 up-regulation was associated with CRC resistance to 5-FU. Circ_0007031 knockdown repressed CRC cell proliferation, migration and invasion and enhanced 5-FU sensitivity. Circ_0007031 directly interacted with miR-133b. Moreover, circ_0007031 knockdown regulated CRC cell progression and 5-FU sensitivity by miR-133b. ABCC5 was a direct target of miR-133b, and circ_0007031 mediated ABCC5 expression via acting as a miR-133b sponge. Furthermore, miR-133b overexpression regulated CRC cell progression and sensitivity to 5-FU by down-regulating ABCC5. Additionally, circ_0007031 knockdown suppressed tumor growth in vivo. Our current work had led to the identification of circ_0007031 knockdown that repressed CRC cell malignant progression and enhanced 5-FU sensitivity via regulating ABCC5 expression by sponging miR-133b.
Collapse
|
15
|
Abstract
Colorectal cancer (CRC) is one of the most common types of malignant cancer worldwide and poses a significant burden on both the individual and healthcare systems. Despite advances in treatment options, advanced-stage CRC has a high mortality rate due to its heterogeneity, metastatic potential and/or delay in diagnosis. In recent years, an increasing number of studies have indicated that circular RNAs (circRNAs) serve important roles in several types of cancer, including CRC. Recent studies have revealed that circRNAs are aberrantly expressed in CRC tissues and function as oncogenic or tumor suppressive regulators of CRC carcinogenesis and development. Numerous circRNAs have been associated with the clinicopathological features of patients with CRC and have been considered as potential biomarkers for the diagnosis and prognosis of CRC, as well as targets for treatment. However, a deeper understanding of their potential function is required. In the present review, the current body of knowledge on the biogenesis and functions of CRC-associated circRNAs, and their potential value in clinical applications, such as in CRC diagnosis, prognosis and treatment, is discussed and summarized.
Collapse
Affiliation(s)
- Mingying Zhang
- Department of Oncology, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, P.R. China
- Shenzhen Key Laboratory of Gastrointestinal Cancer Translational Research, Cancer Institute of Shenzhen-PKU-HKUST Medical Center, Shenzhen, Guangdong 518036, P.R. China
- Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Shubin Wang
- Department of Oncology, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, P.R. China
- Shenzhen Key Laboratory of Gastrointestinal Cancer Translational Research, Cancer Institute of Shenzhen-PKU-HKUST Medical Center, Shenzhen, Guangdong 518036, P.R. China
- Correspondence to: Professor Shubin Wang, Department of Oncology, Peking University Shenzhen Hospital, 1120 Lianhua Road, Futian, Shenzhen, Guangdong 518036, P.R. China, E-mail:
| |
Collapse
|
16
|
Zhu M, Wang Y, Wang F, Li L, Qiu X. CircFBXL5 promotes the 5-FU resistance of breast cancer via modulating miR-216b/HMGA2 axis. Cancer Cell Int 2021; 21:384. [PMID: 34281530 PMCID: PMC8287742 DOI: 10.1186/s12935-021-02088-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [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: 04/19/2021] [Accepted: 07/10/2021] [Indexed: 12/29/2022] Open
Abstract
Background Circular RNAs (circRNAs) have been confirmed to be relevant to the 5-fluorouracil (5-FU) resistance of breast cancer. Nevertheless, how and whether circRNA F-box and leucine-rich repeat protein 5 (circFBXL5) regulates the 5-FU resistance of breast cancer is uncertain. This study aims to explore the function and mechanism of circFBXL5 in the 5-FU resistance of breast cancer. Methods Thirty nine paired breast cancer and normal tissues were harvested. circFBXL5, microRNA-216b (miR-216b) and high-mobility group AT-hook 2 (HMGA2) abundances were examined via quantitative reverse transcription polymerase chain reaction or western blot. Cell viability, 5-FU resistance, migration, invasion, and apoptosis were tested via cell counting kit-8 assay, wound healing analysis, transwell analysis, and flow cytometry. The relationship of miR-216b and circFBXL5 or HMGA2 was tested via dual-luciferase reporter analysis and RNA pull-down assay. The impact of circFBXL5 on breast cancer tumor growth in vivo was analyzed via xenograft model. Results circFBXL5 was highly expressed in breast cancer tissues and cells, and was more upregulated in 5-FU-resistant breast cancer cells. Function experiments showed that circFBXL5 knockdown inhibited the 5-FU resistance of breast cancer by inhibiting cell migration, invasion and promoting apoptosis. In the terms of mechanism, miR-216b could be sponged by circFBXL5, and its inhibitor could also reverse the influence of circFBXL5 silencing on the 5-FU resistance of breast cancer cells. In addition, HMGA2 was a target of miR-216b, and its overexpression also reversed the regulation of miR-216b overexpression on the 5-FU resistance of breast cancer. Furthermore, circFBXL5 interference declined breast cancer tumor growth in xenograft model. Conclusion Our data showed that circFBXL5 could promote the 5-FU resistance of breast cancer by regulating miR-216b/HMGA2 axis.
Collapse
Affiliation(s)
- Mingzhi Zhu
- Department of Breast Surgery, The First Affiliated Hospital of Zhengzhou University, Jianshe Dong Lu, Erqi District , Zhengzhou City, 450052 , Henan Province , China
| | - Yanyan Wang
- Department of Breast Surgery, The First Affiliated Hospital of Zhengzhou University, Jianshe Dong Lu, Erqi District , Zhengzhou City, 450052 , Henan Province , China
| | - Fang Wang
- Department of Breast Surgery, The First Affiliated Hospital of Zhengzhou University, Jianshe Dong Lu, Erqi District , Zhengzhou City, 450052 , Henan Province , China
| | - Lin Li
- Department of Breast Surgery, The First Affiliated Hospital of Zhengzhou University, Jianshe Dong Lu, Erqi District , Zhengzhou City, 450052 , Henan Province , China
| | - Xinguang Qiu
- Department of Thyroid Surgery, The First Affiliated Hospital of Zhengzhou University, Jianshe Dong Lu, Erqi District, Zhengzhou City, 450052, Henan Province, China.
| |
Collapse
|
17
|
Radanova M, Mihaylova G, Nazifova-Tasinova N, Levkova M, Tasinov O, Ivanova D, Mihaylova Z, Donev I. Oncogenic Functions and Clinical Significance of Circular RNAs in Colorectal Cancer. Cancers (Basel) 2021; 13:3395. [PMID: 34298612 PMCID: PMC8303601 DOI: 10.3390/cancers13143395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/13/2021] [Accepted: 07/02/2021] [Indexed: 12/11/2022] Open
Abstract
Colorectal cancer (CRC) is ranked as the second most commonly diagnosed disease in females and the third in males worldwide. Therefore, the finding of new more reliable biomarkers for early diagnosis, for prediction of metastasis, and resistance to conventional therapies is an important challenge in overcoming the disease. The current review presents circular RNAs (circRNAs) with their unique features as potential prognostic and diagnostic biomarkers in CRC. The review highlights the mechanism of action and the role of circRNAs with oncogenic functions in the CRC as well as the association between their expression and clinicopathological characteristics of CRC patients. The comprehension of the role of oncogenic circRNAs in CRC pathogenesis is growing rapidly and the next step is using them as suitable new drug targets in the personalized treatment of CRC patients.
Collapse
Affiliation(s)
- Maria Radanova
- Department of Biochemistry, Molecular Medicine and Nutrigenomics, Medical University of Varna, 9000 Varna, Bulgaria; (M.R.); (G.M.); (N.N.-T.); (O.T.); (D.I.)
- Laboratory of Molecular Pathology, University Hospital “St. Marina”, 9000 Varna, Bulgaria
| | - Galya Mihaylova
- Department of Biochemistry, Molecular Medicine and Nutrigenomics, Medical University of Varna, 9000 Varna, Bulgaria; (M.R.); (G.M.); (N.N.-T.); (O.T.); (D.I.)
| | - Neshe Nazifova-Tasinova
- Department of Biochemistry, Molecular Medicine and Nutrigenomics, Medical University of Varna, 9000 Varna, Bulgaria; (M.R.); (G.M.); (N.N.-T.); (O.T.); (D.I.)
| | - Mariya Levkova
- Department of Medical Genetics, Molecular Medicine and Nutrigenomics, Medical University of Varna, 9000 Varna, Bulgaria;
| | - Oskan Tasinov
- Department of Biochemistry, Molecular Medicine and Nutrigenomics, Medical University of Varna, 9000 Varna, Bulgaria; (M.R.); (G.M.); (N.N.-T.); (O.T.); (D.I.)
| | - Desislava Ivanova
- Department of Biochemistry, Molecular Medicine and Nutrigenomics, Medical University of Varna, 9000 Varna, Bulgaria; (M.R.); (G.M.); (N.N.-T.); (O.T.); (D.I.)
| | - Zhasmina Mihaylova
- Clinic of Medical Oncology, Military Medical Academy, 1000 Sofia, Bulgaria;
| | - Ivan Donev
- Clinic of Medical Oncology, Hospital Nadezhda, 1000 Sofia, Bulgaria
| |
Collapse
|
18
|
Huang P, Li F, Mo Z, Geng C, Wen F, Zhang C, Guo J, Wu S, Li L, Brünner N, Stenvang J. A Comprehensive RNA Study to Identify circRNA and miRNA Biomarkers for Docetaxel Resistance in Breast Cancer. Front Oncol 2021; 11:669270. [PMID: 34055636 PMCID: PMC8162208 DOI: 10.3389/fonc.2021.669270] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 02/18/2021] [Accepted: 04/26/2021] [Indexed: 12/14/2022] Open
Abstract
To investigate the relationship between non-coding RNAs [especially circular RNAs (circRNAs)] and docetaxel resistance in breast cancer, and to find potential predictive biomarkers for taxane-containing therapies, we have performed transcriptome and microRNA (miRNA) sequencing for two established docetaxel-resistant breast cancer (DRBC) cell lines and their docetaxel-sensitive parental cell lines. Our analyses revealed differences between circRNA signatures in the docetaxel-resistant and -sensitive breast cancer cells, and discovered circRNAs generated by multidrug-resistance genes in taxane-resistant cancer cells. In DRBC cells, circABCB1 was identified and validated as a circRNA that is strongly up-regulated, whereas circEPHA3.1 and circEPHA3.2 are strongly down-regulated. Furthermore, we investigated the potential functions of these circRNAs by bioinformatics analysis, and miRNA analysis was performed to uncover potential interactions between circRNAs and miRNAs. Our data showed that circABCB1, circEPHA3.1 and circEPHA3.2 may sponge up eight significantly differentially expressed miRNAs that are associated with chemotherapy and contribute to docetaxel resistance via the PI3K-Akt and AGE-RAGE signaling pathways. We also integrated differential expression data of mRNA, long non-coding RNA, circRNA, and miRNA to gain a global profile of multi-level RNA changes in DRBC cells, and compared them with changes in DNA copy numbers in the same cell lines. We found that Chromosome 7 q21.12-q21.2 was a common region dominated by multi-level RNA overexpression and DNA amplification, indicating that overexpression of the RNA molecules transcribed from this region may result from DNA amplification during stepwise exposure to docetaxel. These findings may help to further our understanding of the mechanisms underlying docetaxel resistance in breast cancer.
Collapse
Affiliation(s)
| | - Fengyu Li
- BGI Genomics, BGI-Shenzhen, Shenzhen, China
| | | | | | - Fang Wen
- MGI, BGI-Shenzhen, Shenzhen, China
| | | | - Jia Guo
- BGI, BGI-Shenzhen, Shenzhen, China
| | - Song Wu
- Shenzhen Luohu Hospital Group, The Affiliated Luohu Hospital of Shenzhen University, Shenzhen, China
| | - Lin Li
- BGI Genomics, BGI-Shenzhen, Shenzhen, China.,National Research Center for Translational Medicine, National Key Scientific Infrastructure for Translational Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Nils Brünner
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jan Stenvang
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| |
Collapse
|
19
|
Pal JK, Ray SS, Pal SK. Identifying Drug Resistant miRNAs Using Entropy Based Ranking. IEEE/ACM Trans Comput Biol Bioinform 2021; 18:973-984. [PMID: 31398129 DOI: 10.1109/tcbb.2019.2933205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
MicroRNAs play an important role in controlling drug sensitivity and resistance in cancer. Identification of responsible miRNAs for drug resistance can enhance the effectiveness of treatment. A new set theoretic entropy measure (SPEM) is defined to determine the relevance and level of confidence of miRNAs in deciding their drug resistant nature. Here, a pattern is represented by a pair of values. One of them implies the degree of its belongingness (fuzzy membership) to a class and the other represents the actual class of origin (crisp membership). A measure, called granular probability, is defined that determines the confidence level of having a particular pair of membership values. The granules used to compute the said probability are formed by a histogram based method where each bin of a histogram is considered as one granule. The width and number of the bins are automatically determined by the algorithm. The set thus defined, comprising a pair of membership values and the confidence level for having them, is used for the computation of SPEM and thereby identifying the drug resistant miRNAs. The efficiency of SPEM is demonstrated extensively on six data sets. While the achieved F-score in classifying sensitive and resistant samples ranges between 0.31 & 0.50 using all the miRNAs by SVM classifier, the same score varies from 0.67 to 0.94 using only the top 1 percent drug resistant miRNAs. Superiority of the proposed method as compared to some existing ones is established in terms of F-score. The significance of the top 1 percent miRNAs in corresponding cancer is also verified by the different articles based on biological investigations. Source code of SPEM is available at http://www.jayanta.droppages.com/SPEM.html.
Collapse
|
20
|
Abstract
Circular RNA (circRNA) is a highly abundant type of single-stranded non-coding RNA. Novel research has discovered many roles of circRNA in colorectal cancer (CRC) including proliferation, metastasis and apoptosis. Furthermore, circRNAs also play a role in the development of drug resistance and have unique associations with tumour size, staging and overall survival in CRC that lend circRNAs the potential to serve as diagnostic and prognostic biomarkers. Among cancers worldwide, CRC ranks second in mortality and third in incidence. In order to have a better understanding of the influence of circRNA on CRC development and progression, this review summarizes the role of specific circRNAs in CRC and evaluates their potential value as therapeutic targets and biomarkers for CRC. We aim to provide insight in the development of therapy and clinical decision-making.
Collapse
Affiliation(s)
- Anthony Li
- Department of Pathology and Laboratory MedicineWestern UniversityLondonCanada
- School of MedicineQueen’s UniversityKingstonCanada
| | - Wei Cen Wang
- Department of Microbiology & ImmunologyWestern UniversityLondonCanada
| | - Vivian McAlister
- Department of SurgeryWestern UniversityLondonCanada
- London Health Sciences CentreLondonCanada
| | - Qinfeng Zhou
- Department of Pathology and Laboratory MedicineWestern UniversityLondonCanada
- Department of Laboratory MedicineZhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese MedicineSuzhouChina
| | - Xiufen Zheng
- Department of Pathology and Laboratory MedicineWestern UniversityLondonCanada
- Department of SurgeryWestern UniversityLondonCanada
- Department of OncologyWestern UniversityLondonCanada
- Lawson Health Research InstituteLondonCanada
| |
Collapse
|
21
|
Micallef I, Baron B. The Mechanistic Roles of ncRNAs in Promoting and Supporting Chemoresistance of Colorectal Cancer. Noncoding RNA 2021; 7:24. [PMID: 33807355 PMCID: PMC8103280 DOI: 10.3390/ncrna7020024] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [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: 01/13/2021] [Revised: 03/03/2021] [Accepted: 03/29/2021] [Indexed: 12/12/2022] Open
Abstract
Colorectal Cancer (CRC) is one of the most common gastrointestinal malignancies which has quite a high mortality rate. Despite the advances made in CRC treatment, effective therapy is still quite challenging, particularly due to resistance arising throughout the treatment regimen. Several studies have been carried out to identify CRC chemoresistance mechanisms, with research showing different signalling pathways, certain ATP binding cassette (ABC) transporters and epithelial mesenchymal transition (EMT), among others to be responsible for the failure of CRC chemotherapies. In the last decade, it has become increasingly evident that certain non-coding RNA (ncRNA) families are involved in chemoresistance. Research investigations have demonstrated that dysregulation of microRNAs (miRNAs), long non-coding RNAs (lncRNAs) and circular RNAs (circRNAs) contribute towards promoting resistance in CRC via different mechanisms. Considering the currently available data on this phenomenon, a better understanding of how these ncRNAs participate in chemoresistance can lead to suitable solutions to overcome this problem in CRC. This review will first focus on discussing the different mechanisms of CRC resistance identified so far. The focus will then shift onto the roles of miRNAs, lncRNAs and circRNAs in promoting 5-fluorouracil (5-FU), oxaliplatin (OXA), cisplatin and doxorubicin (DOX) resistance in CRC, specifically using ncRNAs which have been recently identified and validated under in vivo or in vitro conditions.
Collapse
Affiliation(s)
| | - Byron Baron
- Centre for Molecular Medicine and Biobanking, University of Malta, MSD2080 Msida, Malta;
| |
Collapse
|
22
|
Wang J, Zhang Y, Liu L, Yang T, Song J. Circular RNAs: new biomarkers of chemoresistance in cancer. Cancer Biol Med 2021; 18:j.issn.2095-3941.2020.0312. [PMID: 33738995 PMCID: PMC8185855 DOI: 10.20892/j.issn.2095-3941.2020.0312] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 11/27/2020] [Indexed: 12/17/2022] Open
Abstract
Chemotherapeutics are validated conventional treatments for patients with advanced cancer. However, with continual application of chemotherapeutics, chemoresistance, which is often predictive of poor prognosis, has gradually become a concern in recent years. Circular RNAs (circRNAs), a class of endogenous noncoding RNAs (ncRNAs) with a closed-loop structure, have been reported to be notable targets and markers for the prognosis, diagnosis, and treatment of many diseases, particularly cancer. Although dozens of studies have shown that circRNAs play major roles in drug-resistance activity in tumors, the mechanisms by which circRNAs affect chemoresistance have yet to be explored. In this review, we describe the detailed mechanisms of circRNAs and chemotherapeutics in various cancers and summarize potential therapeutic targets for drug-resistant tumors.
Collapse
Affiliation(s)
- Jiaqi Wang
- Department of General Surgery, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
- Institute of Digestive Diseases of Xuzhou Medical University, Xuzhou 221002, China
| | - Yi Zhang
- Department of General Surgery, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - Lianyu Liu
- Department of General Surgery, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
- Institute of Digestive Diseases of Xuzhou Medical University, Xuzhou 221002, China
| | - Ting Yang
- Department of General Surgery, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - Jun Song
- Department of General Surgery, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
- Institute of Digestive Diseases of Xuzhou Medical University, Xuzhou 221002, China
| |
Collapse
|
23
|
Xi L, Liu Q, Zhang W, Luo L, Song J, Liu R, Wei S, Wang Y. Circular RNA circCSPP1 knockdown attenuates doxorubicin resistance and suppresses tumor progression of colorectal cancer via miR-944/FZD7 axis. Cancer Cell Int 2021; 21:153. [PMID: 33663510 PMCID: PMC7934234 DOI: 10.1186/s12935-021-01855-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [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: 11/02/2020] [Accepted: 02/24/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Circular RNAs (circRNAs) have been reported to play vital roles in colorectal cancer (CRC). However, only a few circRNAs have been experimentally validated and functionally described. In this research, we aimed to reveal the functional mechanism of circCSPP1 in CRC. METHODS 36 DOX sensitive and 36 resistant CRC cases participated in this study. The expression of circCSPP1, miR-944 and FZD7 were detected by quantitative real time polymerase chain reaction (qRT-PCR) and the protein levels of FZD7, MRP1, P-gp and LRP were detected by western blot. Cell proliferation, migration, invasion, and apoptosis were assessed by 3-(4, 5-dimethyl-2-thiazolyl)-2, 5-diphenyl-2-H-tetrazolium bromide (MTT) assay, transwell assay, or flow cytometry analysis, respectively. The interaction between miR-944 and circCSPP1 or frizzled-7 (FZD7) was predicted by Starbase 3.0 and verified by the dual luciferase reporter assay, RNA immunoprecipitation (RIP) assay and RNA pull down assay. Xenograft tumor assay was performed to examine the effect of circCSPP1 on tumor growth in vivo. RESULTS The expression of circCSPP1 and FZD7 was upregulated while miR-944 expression was downregulated in doxorubicin (DOX)-resistant CRC tissues and cells. CircCSPP1 knockdown significantly downregulated enhanced doxorubicin sensitivity, suppressed proliferation, migration, invasion, and induced apoptosis in DOX-resistant CRC cells. Interestingly, we found that circCSPP1 directly downregulated miR-944 expression and miR-944 decreased FZD7 level through targeting to 3' untranslated region (UTR) of FZD7. Furthermore, circCSPP1 mediated DOX-resistant CRC cell progression and doxorubicin sensitivity by regulating miR-944/FZD7 axis. Besides, circCSPP1 downregulation dramatically repressed CRC tumor growth in vivo. CONCLUSION Our data indicated that circCSPP1 knockdown inhibited DOX-resistant CRC cell growth and enhanced doxorubicin sensitivity by miR-944/FZD7 axis, providing a potential target for CRC therapy.
Collapse
Affiliation(s)
- Lanlan Xi
- Department of Surgery of Traditional Chinese Medicine, Henan University of Traditional Chinese Medicine, Zhengzhou, China
| | - Quanlin Liu
- Department of Colorectal Surgery, Zhengzhou Anorectal Hospital, No. 51, Longhai East Road, Zhengzhou, 450004, China.
| | - Wei Zhang
- Department of Colorectal Surgery, Zhengzhou Anorectal Hospital, No. 51, Longhai East Road, Zhengzhou, 450004, China
| | - Linshan Luo
- Department of Colorectal Surgery, Zhengzhou Anorectal Hospital, No. 51, Longhai East Road, Zhengzhou, 450004, China
| | - Jingfeng Song
- Department of Colorectal Surgery, Zhengzhou Anorectal Hospital, No. 51, Longhai East Road, Zhengzhou, 450004, China
| | - Ruitao Liu
- Department of Large Intestine, Zhengzhou Anorectal Hospital, Zhengzhou, China
| | - Shue Wei
- Department of Large Intestine, Zhengzhou Anorectal Hospital, Zhengzhou, China
| | - Yong Wang
- Department of Colorectal Surgery, Zhengzhou Anorectal Hospital, No. 51, Longhai East Road, Zhengzhou, 450004, China
| |
Collapse
|
24
|
Wei J, Lin Y, Wang Z, Liu Y, Guo W. Circ_0006174 Accelerates Colorectal Cancer Progression Through Regulating miR-138-5p/MACC1 Axis. Cancer Manag Res 2021; 13:1673-1686. [PMID: 33628056 PMCID: PMC7899310 DOI: 10.2147/cmar.s295833] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 12/04/2020] [Accepted: 01/21/2021] [Indexed: 12/15/2022] Open
Abstract
Background Circular RNAs (circRNAs) were reported to be involved in the progression of a variety of cancers, including colorectal cancer (CRC). However, the precise functions and mechanism of circRNAs in CRC have not been elucidated. This study aimed to investigate the effect and mechanism underlying circ_0006174 in CRC. Methods The expression of circ_0006174, microRNA (miR-138-5p) and metastasis associated in colon cancer 1 (MACC1) mRNA was detected by quantitative real-time polymerase chain reaction (RT-qPCR) assay. Western blot was employed to measure MACC1 protein expression. The effects of circ_0006174 knockdown, MACC1 overexpression or miR-138-5p inhibition on cell proliferation, migration, invasion, and apoptosis were assessed by cell counting kit 8 (CCK-8) assay, clone formation assay, transwell assay and flow cytometry assay, respectively. The interaction between miR-138-5p and circ_0006174 or MACC1 was confirmed by RNA pull down assay or dual-luciferase reporter assay. Xenograft tumor model in nude mice was used to verify the function of circ_0006174 in vivo. Results Circ_0006174 and MACC1 expression was highly expressed, while miR-138-5p expression was downregulated in CRC cells and tissues. Meanwhile, circ_0006174 functioned as a sponge of miR-138-5p to upregulate MACC1 expression. Furthermore, circ_0006174 knock down-mediated suppression on cell proliferation, migration and invasion, and promotion on cell apoptosis could be alleviated by MACC1 overexpression or miR-138-5p inhibition in CRC cells. Besides, circ_0006174 knockdown also inhibited CRC procession in vivo. Conclusion Circ_0006174 advanced CRC progression via sponging miR-138-5p to upregulate MACC1 expression, which may provide a promising molecular target for CRC treatment.
Collapse
Affiliation(s)
- Jianjun Wei
- Minimally Invasive Surgery, Linhe People's Hospital of Bayannur City, Bayannur, Inner Mongolia, 015000, People's Republic of China
| | - Yuzhe Lin
- Minimally Invasive Surgery, Linhe People's Hospital of Bayannur City, Bayannur, Inner Mongolia, 015000, People's Republic of China
| | - Zhiqiang Wang
- Minimally Invasive Surgery, Linhe People's Hospital of Bayannur City, Bayannur, Inner Mongolia, 015000, People's Republic of China
| | - Yeguang Liu
- Minimally Invasive Surgery, Linhe People's Hospital of Bayannur City, Bayannur, Inner Mongolia, 015000, People's Republic of China
| | - Wei Guo
- Minimally Invasive Surgery, Linhe People's Hospital of Bayannur City, Bayannur, Inner Mongolia, 015000, People's Republic of China
| |
Collapse
|
25
|
Nisar S, Bhat AA, Singh M, Karedath T, Rizwan A, Hashem S, Bagga P, Reddy R, Jamal F, Uddin S, Chand G, Bedognetti D, El-Rifai W, Frenneaux MP, Macha MA, Ahmed I, Haris M. Insights Into the Role of CircRNAs: Biogenesis, Characterization, Functional, and Clinical Impact in Human Malignancies. Front Cell Dev Biol 2021; 9:617281. [PMID: 33614648 PMCID: PMC7894079 DOI: 10.3389/fcell.2021.617281] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [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: 10/14/2020] [Accepted: 01/04/2021] [Indexed: 01/17/2023] Open
Abstract
Circular RNAs (circRNAs) are an evolutionarily conserved novel class of non-coding endogenous RNAs (ncRNAs) found in the eukaryotic transcriptome, originally believed to be aberrant RNA splicing by-products with decreased functionality. However, recent advances in high-throughput genomic technology have allowed circRNAs to be characterized in detail and revealed their role in controlling various biological and molecular processes, the most essential being gene regulation. Because of the structural stability, high expression, availability of microRNA (miRNA) binding sites and tissue-specific expression, circRNAs have become hot topic of research in RNA biology. Compared to the linear RNA, circRNAs are produced differentially by backsplicing exons or lariat introns from a pre-messenger RNA (mRNA) forming a covalently closed loop structure missing 3′ poly-(A) tail or 5′ cap, rendering them immune to exonuclease-mediated degradation. Emerging research has identified multifaceted roles of circRNAs as miRNA and RNA binding protein (RBP) sponges and transcription, translation, and splicing event regulators. CircRNAs have been involved in many human illnesses, including cancer and neurodegenerative disorders such as Alzheimer’s and Parkinson’s disease, due to their aberrant expression in different pathological conditions. The functional versatility exhibited by circRNAs enables them to serve as potential diagnostic or predictive biomarkers for various diseases. This review discusses the properties, characterization, profiling, and the diverse molecular mechanisms of circRNAs and their use as potential therapeutic targets in different human malignancies.
Collapse
Affiliation(s)
- Sabah Nisar
- Functional and Molecular Imaging Laboratory, Cancer Research Department, Sidra Medicine, Doha, Qatar
| | - Ajaz A Bhat
- Functional and Molecular Imaging Laboratory, Cancer Research Department, Sidra Medicine, Doha, Qatar
| | - Mayank Singh
- Dr. B. R. Ambedkar Institute Rotary Cancer Hospital (BRAIRCH), All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | | | - Arshi Rizwan
- Department of Nephrology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Sheema Hashem
- Functional and Molecular Imaging Laboratory, Cancer Research Department, Sidra Medicine, Doha, Qatar
| | - Puneet Bagga
- Diagnostic Imaging, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - Ravinder Reddy
- Department of Radiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, United States
| | - Farrukh Jamal
- Dr. Rammanohar Lohia Avadh University, Ayodhya, India
| | - Shahab Uddin
- Translational Research Institute, Academic Health System, Hamad Medical Corporation, Doha, Qatar
| | - Gyan Chand
- Department of Endocrine Surgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India
| | - Davide Bedognetti
- Laboratory of Cancer Immunogenomics, Cancer Research Department, Sidra Medicine, Doha, Qatar.,Department of Internal Medicine and Medical Specialties, University of Genoa, Genoa, Italy.,College of Health and Life Sciences, Hamad Bin Khalifa University, Doha, Qatar
| | - Wael El-Rifai
- Department of Surgery, University of Miami Miller School of Medicine, Miami, FL, United States
| | | | - Muzafar A Macha
- Watson-Crick Centre for Molecular Medicine, Islamic University of Science and Technology (IUST), Pulwama, India
| | - Ikhlak Ahmed
- Research Branch, Sidra Medicine, Doha, Qatar.,Research Branch, Sidra Medicine, Doha, Qatar
| | - Mohammad Haris
- Functional and Molecular Imaging Laboratory, Cancer Research Department, Sidra Medicine, Doha, Qatar.,Laboratory Animal Research Center, Qatar University, Doha, Qatar
| |
Collapse
|
26
|
Long F, Lin Z, Li L, Ma M, Lu Z, Jing L, Li X, Lin C. Comprehensive landscape and future perspectives of circular RNAs in colorectal cancer. Mol Cancer 2021; 20:26. [PMID: 33536039 PMCID: PMC7856739 DOI: 10.1186/s12943-021-01318-6] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 01/19/2021] [Indexed: 12/14/2022] Open
Abstract
Colorectal cancer (CRC) is a common hereditary tumor that is often fatal. Its pathogenesis involves multiple genes, including circular RNAs (circRNAs). Notably, circRNAs constitute a new class of noncoding RNAs (ncRNAs) with a covalently closed loop structure and have been characterized as stable, conserved molecules that are abundantly expressed in tissue/development-specific patterns in eukaryotes. Based on accumulating evidence, circRNAs are aberrantly expressed in CRC tissues, cells, exosomes, and blood from patients with CRC. Moreover, numerous circRNAs have been identified as either oncogenes or tumor suppressors that mediate tumorigenesis, metastasis and chemoradiation resistance in CRC. Although the regulatory mechanisms of circRNA biogenesis and functions remain fairly elusive, interesting results have been obtained in studies investigating CRC. In particular, the expression of circRNAs in CRC is comprehensively modulated by multiple factors, such as splicing factors, transcription factors, specific enzymes and cis-acting elements. More importantly, circRNAs exert pivotal effects on CRC through various mechanisms, including acting as miRNA sponges or decoys, interacting with RNA binding proteins, and even translating functional peptides. Finally, circRNAs may serve as promising diagnostic and prognostic biomarkers and potential therapeutic targets in the clinical practice of CRC. In this review, we discuss the dysregulation, functions and clinical significance of circRNAs in CRC and further discuss the molecular mechanisms by which circRNAs exert their functions and how their expression is regulated. Based on this review, we hope to reveal the functions of circRNAs in the initiation and progression of cancer and highlight the future perspectives on strategies targeting circRNAs in cancer research.
Collapse
Affiliation(s)
- Fei Long
- Department of Gastrointestinal Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, P.R. China
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of The University of South China, Hengyang, Hunan, 421001, P.R. China
| | - Zhi Lin
- Department of Pediatrics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, P.R. China
| | - Liang Li
- Class 25 Grade 2016, The Five-Year Program in Clinical Medicine, School of Medicine, University of South China, Hengyang, Hunan, 421001, P.R. China
| | - Min Ma
- Department of Gastrointestinal Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, P.R. China
| | - Zhixing Lu
- Department of Gastrointestinal Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, P.R. China
| | - Liang Jing
- Department of Gastrointestinal Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, P.R. China
| | - Xiaorong Li
- Department of Gastrointestinal Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, P.R. China.
| | - Changwei Lin
- Department of Gastrointestinal Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, P.R. China.
- School of Life Sciences, Central South University, Changsha, 410078, Hunan, China.
| |
Collapse
|
27
|
Abstract
Circular RNAs (circRNAs) are a class of endogenous single-stranded covalently closed RNAs, primarily produced from pre-mRNAs via non-canonical back-splicing. circRNAs are highly conserved, stable, and expressed in tissue- and development-specific pattern. circRNAs play essential roles in physiological process as well as cancer biology. By the advances of deep sequencing and bioinformatics, the number of circRNAs have increased explosively. circRNAs function as miRNA/protein sponge, protein scaffold, protein recruitment, enhancer of protein function, as well as templates for translation involved in the regulation of transcription/splicing, translation, protein degradation, and pri-miRNA processing in human cancers and contributed to the pathogenesis of cancer. Numerous circRNAs may function in diverse manners. In this review, we survey the current understanding of circRNA functions in human cancer including miRNA sponge, circRNA-protein interaction, and circRNA-encoded protein, and summarize available databases for circRNA annotation and functional prediction.
Collapse
Affiliation(s)
- Xiong Wang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Huijun Li
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Yanjun Lu
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Liming Cheng
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
28
|
Sun Y, Cao Z, Shan J, Gao Y, Liu X, Ma D, Li Z. Hsa_circ_0020095 Promotes Oncogenesis and Cisplatin Resistance in Colon Cancer by Sponging miR-487a-3p and Modulating SOX9. Front Cell Dev Biol 2021; 8:604869. [PMID: 33520987 PMCID: PMC7844065 DOI: 10.3389/fcell.2020.604869] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 09/10/2020] [Accepted: 12/07/2020] [Indexed: 12/21/2022] Open
Abstract
Objectives Colon cancer (CC) currently ranks as the third most common human cancer worldwide with an increasing incidence and a poor prognosis. Recently, circular RNAs have been reported to regulate the progression of diverse human cancers. However, the role of circRNA hsa_circ_0020095 in CC remains largely unclear. Methods Expression levels of the related circRNAs, microRNAs and mRNA in CC tissues and cells were determined. The impacts of circ_0020095 or miR-487a-3p on CC cells were examined at the indicated times after transfection. Meanwhile, a luciferase-reporter experiment was employed to validate the interplay between miR-487a-3p and circ_002009695 or SOX9. Moreover, the in vivo tumor growth assay was applied to further evaluate the effects of circ_0020095 knockdown on CC progression. Results We demonstrated that circ_0020095 was highly expressed in CC tissues and cells. The proliferation, migration, invasion, and cisplatin resistance of CC were suppressed by silencing circ_0020095 in vitro and in vivo or by ectopic expression of miR-487a-3p in vitro. Mechanistically, circ_0020095 could directly bind to miR-487a-3p and subsequently act as a miR-487a-3p sponge to modulate the activity by targeting the 3′-UTR of SOX9. Interestingly, overexpression of circ_0020095 dramatically reversed the suppressive effects of miR-487a-3p mimics on CC cells. Conclusion Circ_0020095 functions as an oncogene to accelerate CC cell proliferation, invasion, migration and cisplatin resistance through the miR-487a-3p/SOX9 axis, which could be a promising target for CC treatment.
Collapse
Affiliation(s)
- Yanlai Sun
- Department of Gastrointestinal Cancer Surgery, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Zhen Cao
- Department of Gastrointestinal Cancer Surgery, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China.,Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Junqi Shan
- Department of Gastrointestinal Cancer Surgery, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Yang Gao
- Department of Gastrointestinal Cancer Surgery, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Xin Liu
- Department of Gastrointestinal Cancer Surgery, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Dejian Ma
- Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Zengjun Li
- Department of Gastrointestinal Cancer Surgery, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| |
Collapse
|
29
|
Beilerli A, Gareev I, Beylerli O, Yang G, Pavlov V, Aliev G, Ahmad A. Circular RNAs as biomarkers and therapeutic targets in cancer. Semin Cancer Biol 2021:S1044-579X(21)00004-3. [PMID: 33434640 DOI: 10.1016/j.semcancer.2020.12.026] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 11/25/2020] [Accepted: 12/30/2020] [Indexed: 02/06/2023]
Abstract
Circular RNAs (circRNAs) are a class of single-stranded closed non-coding RNA molecules (ncRNAs), which are formed as a result of reverse splicing of mRNAs. Despite their relative abundance, an interest in understanding their regulatory importance is rather recent. High stability, abundance and evolutionary conservation among species underline some of their important traits. CircRNAs perform a variety of cellular functions ranging from miRNA and proteins sponges to transcriptional modulation and splicing. Additionally, most circRNAs are expressed aberrantly in pathological conditions suggesting their possible exploitation as diagnostic biomarkers. Their covalent closed cyclic structure resulting in resistance to RNases further makes them suitable as cancer biomarkers. Studies involving human tumors have verified differences in the expression profiles of circRNAs, indicating a regulatory role in cancer pathogenesis and metastasis. As endogenous competitive RNA, circRNAs can regulate tumor proliferation and invasion. Further, some circRNAs located in the nucleus can regulate transcription of genes by binding to RNA polymerase II. In this review, we elaborate the characteristics, functions and mechanisms of action of circRNAs in cancer. We also discuss the possibility of using circRNAs as potential therapeutic targets and biomarkers for cancer.
Collapse
|
30
|
Li L, Sun D, Li X, Yang B, Zhang W. Identification of Key circRNAs in Non-Small Cell Lung Cancer. Am J Med Sci 2021; 361:98-105. [DOI: 10.1016/j.amjms.2020.08.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 05/31/2020] [Accepted: 08/07/2020] [Indexed: 12/14/2022]
|
31
|
Li S, Zheng S. Down-Regulation of Circ_0032833 Sensitizes Colorectal Cancer to 5-Fluorouracil and Oxaliplatin Partly Depending on the Regulation of miR-125-5p and MSI1. Cancer Manag Res 2020; 12:11257-11269. [PMID: 33177876 PMCID: PMC7649231 DOI: 10.2147/cmar.s270123] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 06/30/2020] [Accepted: 09/14/2020] [Indexed: 12/24/2022] Open
Abstract
Background 5-fluorouracil, leucovorin, and oxaliplatin (FOLFOX) is an effective chemotherapy for colorectal cancer (CRC) in clinic. It remains unclear regarding the effect of circular RNA (circRNA) circ_0032833 on regulating chemosensitivity in CRC. Methods Drug resistance analysis was performed by Cell Counting Kit-8 (CCK-8) assay. All RNA and protein levels were, respectively, measured via quantitative real-time polymerase chain reaction (qRT-PCR) and Western blot. Cellular colony capacity, apoptosis and metastasis were evaluated using colony formation assay, Annexin-FITC/PI flow cytometry and transwell migration/invasion assays. The molecular combination was notarized using dual-luciferase reporter and RNA immunoprecipitation (RIP) assays. The in vivo experiment was conducted via xenograft tumors in mice. Results Circ_0032833 was significantly up-regulated in FOLFOX-resistant CRC and associated with drug resistance. Knockdown of circ_0032833 could sensitize FOLFOX-resistant CRC cells to 5-fluorouracil and oxaliplatin. Circ_0032833 was a miR-125-5p sponge, and miR-125-5p overexpression was responsible for the effect of circ_0032833 knockdown on 5-fluorouracil and oxaliplatin sensitivities. Besides, miR-125-5p targeted Musashi1 (MSI1) to increase the susceptibility of 5-fluorouracil and oxaliplatin in FOLFOX-resistant CRC cells. We found that circ_0032833 generated the regulation on MSI1 by sponging miR-125-5p. Circ_0032833 down-regulation also promoted the 5-fluorouracil and oxaliplatin sensitivities partly through the miR-125-5p/MSI1 axis in vivo. Conclusion This study illuminated an unambiguous mechanism circ_0032833/miR-125-5p/MSI1 on regulating 5-fluorouracil and oxaliplatin sensitivities in FOLFOX therapy, maybe providing a deep insight of resistance formation and developing a novel strategy to enhance chemosensitivity in CRC.
Collapse
Affiliation(s)
- Shouchao Li
- Department of Anorectal Surgery, Weifang People's Hospital, Weifang 261000, People's Republic of China
| | - Sheng Zheng
- Department of Anorectal Surgery, Weifang People's Hospital, Weifang 261000, People's Republic of China
| |
Collapse
|
32
|
Abstract
Circular RNAs (circRNAs) are a type of single-stranded RNA molecules forming a covalently closed, continuous structure, lacking 5'-3' polarity and polyadenylated tails. Recent advances in high-throughput sequencing technologies have revealed that these molecules are abundant, resistant to degradation and often expressed in a tissue- or developmental stage-specific manner. circRNAs are produced by back-splicing circularization of primary transcripts and exhibit a variety of functions, including regulation of transcription, translation and cellular localization. This review focuses on differentially expressed circRNAs conferring therapy resistance or sensitivity of solid tumors, such as carcinomas, sarcomas and lymphomas. Deregulated circRNAs can participate in the development of resistance to treatment by modulating regulatory pathways and cellular processes, including the mitogen-activated protein kinase pathway, epithelial-mesenchymal transition, apoptosis and autophagy.
Collapse
Affiliation(s)
- Maria Papatsirou
- Department of Biochemistry & Molecular Biology, Faculty of Biology, National & Kapodistrian University of Athens, Athens 15701, Greece
| | - Pinelopi I Artemaki
- Department of Biochemistry & Molecular Biology, Faculty of Biology, National & Kapodistrian University of Athens, Athens 15701, Greece
| | - Andreas Scorilas
- Department of Biochemistry & Molecular Biology, Faculty of Biology, National & Kapodistrian University of Athens, Athens 15701, Greece
| | - Christos K Kontos
- Department of Biochemistry & Molecular Biology, Faculty of Biology, National & Kapodistrian University of Athens, Athens 15701, Greece
| |
Collapse
|
33
|
Zhao X, Wang Y, Yu Q, Yu P, Zheng Q, Yang X, Gao D. Circular RNAs in gastrointestinal cancer: Current knowledge, biomarkers and targeted therapy (Review). Int J Mol Med 2020; 46:1611-1632. [PMID: 33000182 PMCID: PMC7521476 DOI: 10.3892/ijmm.2020.4731] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 09/01/2020] [Indexed: 01/17/2023] Open
Abstract
Circular RNAs (circRNAs) are a type of endogenous non‑coding RNAs that are connected at the 3' and 5' ends by exon or intron cyclization, which forms a covalently closed loop. They are stable, well conserved, exhibit specific expression in mammalian cells and can function as microRNA (miRNA or miR) sponges to regulate the target genes of miRNAs, which influences biological processes. Such as tumor proliferation, invasion, metastasis, apoptosis and tumor stage. circRNAs represent promising candidates for clinical diagnosis and treatment. In the present review, the biogenesis, classification and functions of circRNAs in tumors are briefly summarized and discussed. In addition, the participation of circRNAs in signal transduction pathways regulating gastrointestinal cancer cellular functions is highlighted.
Collapse
Affiliation(s)
- Xiaorui Zhao
- Department of Pathogen Biology and Immunology, Medical College of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Yue Wang
- Department of Pathogen Biology and Immunology, Medical College of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Qiongfang Yu
- Department of Gastroenterology and Hepatology, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Pei Yu
- Department of Pathogen Biology and Immunology, Medical College of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Qiaoyu Zheng
- Department of Pathogen Biology and Immunology, Medical College of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Xue Yang
- Department of Pathogen Biology and Immunology, Medical College of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Dian Gao
- Department of Pathogen Biology and Immunology, Medical College of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| |
Collapse
|
34
|
Abstract
Gastric cancer (GC) is one of the most commonly diagnosed cancers that causes high mortality in the world. Although the surgery tools and chemotherapies have significantly improved the overall survival of patients with GC, the early diagnosis of GC remains insufficient and many patients diagnosed with advanced stages of GC are not able to benefit from curative therapy. Circular RNAs (circRNAs), novel members of the non-coding cancer genome, are being explored with regards to various cancer types including GC. CircRNAs could work as miRNA sponges to regulate cell proliferation, cell migration, and cell cycle in GC. In addition, it was found that abnormal expression of circRNAs was associated with pathological characteristics in GC tissues, which could help to act as potential markers of early diagnosis or predictors of prognosis. Although various functional circRNAs have been discovered and characterized, the studies of circRNAs in GC are still at early stages compared with other RNAs. In order to provide a whole view to better understand the circRNAs in the occurrence and development of GC, we review the current knowledge on circRNAs in relation to their expression and regulation in GC as well as their potential to be diagnosis markers, and their role in drug resistance will be mentioned. It is helpful to address their possibility from basic research into practical application.
Collapse
Affiliation(s)
- Wei Wu
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
- Institute for Translational Medicine, Qingdao University, Qingdao, China
| | - Tianyuan Zhen
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Junmin Yu
- Department of Anesthesiology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
| | - Qingli Yang
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
| |
Collapse
|
35
|
Sabeti Aghabozorgi A, Moradi Sarabi M, Jafarzadeh-Esfehani R, Koochakkhani S, Hassanzadeh M, Kavousipour S, Eftekhar E. Molecular determinants of response to 5-fluorouracil-based chemotherapy in colorectal cancer: The undisputable role of micro-ribonucleic acids. World J Gastrointest Oncol 2020; 12:942-956. [PMID: 33005290 PMCID: PMC7510001 DOI: 10.4251/wjgo.v12.i9.942] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 05/11/2020] [Accepted: 07/19/2020] [Indexed: 02/05/2023] Open
Abstract
5-flurouracil (5-FU)-based chemotherapy is the main pharmacological therapy for advanced colorectal cancer (CRC). Despite significant progress in the treatment of CRC during the last decades, 5-FU drug resistance remains the most important cause of failure in CRC therapy. Resistance to 5-FU is a complex and multistep process. Different mechanisms including microsatellite instability, increased expression level of key enzyme thymidylate synthase and its polymorphism, increased level of 5-FU-activating enzymes and mutation of TP53 are proposed as the main determinants of resistance to 5-FU in CRC cells. Recently, micro-ribonucleic acids (miRNA) and their alterations were found to have a crucial role in 5-FU resistance. In this regard, the miRNA-mediated mechanisms of 5-FU drug resistance reside among the new fields of pharmacogenetics of CRC drug response that has not been completely discovered. Identification of the biological markers that are related to response to 5-FU-based chemotherapy is an emerging field of precision medicine. This approach will have an important role in defining those patients who are most likely to benefit from 5-FU-based chemotherapy in the future. Thereby, the identification of 5-FU drug resistance mechanisms is an essential step to predict and eventually overcome resistance. In the present comprehensive review, we will summarize the latest knowledge regarding the molecular determinants of response to 5-FU-based chemotherapy in CRC by emphasizing the role of miRNAs.
Collapse
Affiliation(s)
| | - Mostafa Moradi Sarabi
- Department of Biochemistry and Genetics, School of Medicine, Lorestan University of Medical Sciences, Khorramabad 381251698, Iran
| | - Reza Jafarzadeh-Esfehani
- Department of Medical Genetics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad 1394491388, Iran
| | - Shabnaz Koochakkhani
- Molecular Medicine Research Center, Hormozgan Health Institute, Hormozgan University of Medical Sciences, Bandar Abbas 7919915519, Iran
| | - Marziyeh Hassanzadeh
- Molecular Medicine Research Center, Hormozgan Health Institute, Hormozgan University of Medical Sciences, Bandar Abbas 7919915519, Iran
| | - Soudabeh Kavousipour
- Molecular Medicine Research Center, Hormozgan Health Institute, Hormozgan University of Medical Sciences, Bandar Abbas 7919915519, Iran
| | - Ebrahim Eftekhar
- Molecular Medicine Research Center, Hormozgan Health Institute, Hormozgan University of Medical Sciences, Bandar Abbas 7919915519, Iran
| |
Collapse
|
36
|
Wang Y, Wang H, Zhang J, Chu Z, Liu P, Zhang X, Li C, Gu X. Circ_0007031 Serves as a Sponge of miR-760 to Regulate the Growth and Chemoradiotherapy Resistance of Colorectal Cancer via Regulating DCP1A. Cancer Manag Res 2020; 12:8465-8479. [PMID: 32982440 PMCID: PMC7500843 DOI: 10.2147/cmar.s254815] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 03/20/2020] [Accepted: 08/03/2020] [Indexed: 12/11/2022] Open
Abstract
Background Colorectal cancer (CRC) is a kind of malignant tumor, and the development of chemoradiotherapy resistance (CRR) increases the difficulty of its treatment. The role of circular RNAs (circRNAs) in cancer progression has been well documented. Nevertheless, the function of circ_0007031 in the growth and CRR of CRC has not been well elucidated. Methods CRR cell lines were constructed using 5-Fu and radiation. Cell counting kit 8 (CCK8) assay was employed to measure the 5-Fu resistance and proliferation of cells. Clonogenic assay was used to evaluate the radiation resistance of cells. Also, the expression of circ_0007031 and microRNA-760 (miR-760) was determined using quantitative real-time polymerase chain reaction (qRT-PCR). The cell cycle distribution and apoptosis of cells were assessed by flow cytometry. Besides, the levels of apoptosis-related protein and mRNA-decapping enzyme 1a (DCP1A) protein were measured by Western blot (WB) analysis. Further, dual-luciferase reporter assay and RNA immunoprecipitation (RIP) assay were used to confirm the interaction between miR-760 and circ_0007031 or DCP1A. In addition, animal experiments were performed to evaluate the function of silenced circ_0007031 on the 5-Fu and radiation resistance of CRC tumors. Results Circ_0007031 expression was markedly increased in CRC tissues and cells, especially in CRC resistant cells. Circ_0007031 knockdown hindered proliferation, induced cell cycle arrest in the G0/G1 phase, enhanced apoptosis, and lowered the CRR of CRC resistant cells. Further, miR-760 could be targeted by circ_0007031, and its inhibitor could reverse the inhibition effect of circ_0007031 knockdown on the growth and CRR of CRC resistant cells. Moreover, DCP1A was a target of miR-760, and its overexpression could invert the suppression effect of miR-760 overexpression on the growth and CRR of CRC resistant cells. Circ_0007031 silencing could enhance the sensitivity of CRC tumors to 5-Fu and radiation to markedly reduce CRC tumor growth in vivo. Conclusion Circ_0007031 might play a positive role in the CRR of CRC through regulating the miR-760/DCP1A axis, which might provide a new approach for treating the CRR of CRC.
Collapse
Affiliation(s)
- Yuanyuan Wang
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, People's Republic of China.,Department of General Surgery, Hebei Key Laboratory of Colorectal Cancer Precision Diagnosis and Treatment, The First Hospital of Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
| | - Hua Wang
- Department of Pharmacy, Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
| | - Jian Zhang
- Department of General Surgery, Hebei Key Laboratory of Colorectal Cancer Precision Diagnosis and Treatment, The First Hospital of Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
| | - Zhifen Chu
- Department of General Surgery, Hebei Key Laboratory of Colorectal Cancer Precision Diagnosis and Treatment, The First Hospital of Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
| | - Pu Liu
- Department of General Surgery, Hebei Key Laboratory of Colorectal Cancer Precision Diagnosis and Treatment, The First Hospital of Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
| | - Xing Zhang
- Department of General Surgery, Hebei Key Laboratory of Colorectal Cancer Precision Diagnosis and Treatment, The First Hospital of Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
| | - Chao Li
- Department of General Surgery, Hebei Key Laboratory of Colorectal Cancer Precision Diagnosis and Treatment, The First Hospital of Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
| | - Xiaosong Gu
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, People's Republic of China
| |
Collapse
|
37
|
Artemaki PI, Scorilas A, Kontos CK. Circular RNAs: A New Piece in the Colorectal Cancer Puzzle. Cancers (Basel) 2020; 12:cancers12092464. [PMID: 32878117 PMCID: PMC7564116 DOI: 10.3390/cancers12092464] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [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: 08/09/2020] [Revised: 08/24/2020] [Accepted: 08/25/2020] [Indexed: 12/16/2022] Open
Abstract
Colorectal cancer (CRC) is the third most fatal type of malignancy, worldwide. Despite the advances accomplished in the elucidation of its molecular base and the existing CRC biomarkers introduced in the clinical practice, additional research is required. Circular RNAs (circRNAs) constitute a new RNA type, formed by back-splicing of primary transcripts. They have been discovered during the 1970s but were characterized as by-products of aberrant splicing. However, the modern high-throughput approaches uncovered their widespread expression; therefore, several questions were raised regarding their potential biological roles. During the last years, great progress has been achieved in the elucidation of their functions: circRNAs can act as microRNA sponges, transcription regulators, and interfere with splicing, as well. Furthermore, they are heavily involved in various human pathological states, including cancer, and could serve as diagnostic and prognostic biomarkers in several diseases. Particularly in CRC, aberrant expression of circRNAs has been observed. More specifically, these molecules either inhibit or promote colorectal carcinogenesis by regulating different molecules and signaling pathways. The present review discusses the characteristics and functions of circRNA, prior to analyzing the multifaceted role of these molecules in CRC and their potential value as biomarkers and therapeutic targets.
Collapse
Affiliation(s)
- Pinelopi I Artemaki
- Department of Biochemistry and Molecular Biology, Faculty of Biology, National and Kapodistrian University of Athens, GR-15701 Athens, Greece
| | - Andreas Scorilas
- Department of Biochemistry and Molecular Biology, Faculty of Biology, National and Kapodistrian University of Athens, GR-15701 Athens, Greece
| | - Christos K Kontos
- Department of Biochemistry and Molecular Biology, Faculty of Biology, National and Kapodistrian University of Athens, GR-15701 Athens, Greece
| |
Collapse
|
38
|
Xu T, Wang M, Jiang L, Ma L, Wan L, Chen Q, Wei C, Wang Z. CircRNAs in anticancer drug resistance: recent advances and future potential. Mol Cancer 2020; 19:127. [PMID: 32799866 PMCID: PMC7429705 DOI: 10.1186/s12943-020-01240-3] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 07/31/2020] [Indexed: 12/13/2022] Open
Abstract
CircRNAs are a novel class of RNA molecules with a unique closed continuous loop structure. CircRNAs are abundant in eukaryotic cells, have unique stability and tissue specificity, and can play a biological regulatory role at various levels, such as transcriptional and posttranscriptional levels. Numerous studies have indicated that circRNAs serve a crucial purpose in cancer biology. CircRNAs regulate tumor behavioral phenotypes such as proliferation and migration through various molecular mechanisms, such as miRNA sponging, transcriptional regulation, and protein interaction. Recently, several reports have demonstrated that they are also deeply involved in resistance to anticancer drugs, from traditional chemotherapeutic drugs to targeted and immunotherapeutic drugs. This review is the first to summarize the latest research on circRNAs in anticancer drug resistance based on drug classification and to discuss their potential clinical applications.
Collapse
Affiliation(s)
- Tianwei Xu
- Cancer Medical Center, The Second Affiliated Hospital of Nanjing Medical University, Jiangjiayuan road 121#, Nanjing, 210011, Jiangsu, P.R. China
| | - Mengwei Wang
- Cancer Medical Center, The Second Affiliated Hospital of Nanjing Medical University, Jiangjiayuan road 121#, Nanjing, 210011, Jiangsu, P.R. China
| | - Lihua Jiang
- Cancer Medical Center, The Second Affiliated Hospital of Nanjing Medical University, Jiangjiayuan road 121#, Nanjing, 210011, Jiangsu, P.R. China
| | - Li Ma
- Cancer Medical Center, The Second Affiliated Hospital of Nanjing Medical University, Jiangjiayuan road 121#, Nanjing, 210011, Jiangsu, P.R. China
| | - Li Wan
- Department of Oncology, The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, Huai'an, 223300, Jiangsu, China
| | - Qinnan Chen
- Cancer Medical Center, The Second Affiliated Hospital of Nanjing Medical University, Jiangjiayuan road 121#, Nanjing, 210011, Jiangsu, P.R. China
| | - Chenchen Wei
- Cancer Medical Center, The Second Affiliated Hospital of Nanjing Medical University, Jiangjiayuan road 121#, Nanjing, 210011, Jiangsu, P.R. China.
| | - Zhaoxia Wang
- Cancer Medical Center, The Second Affiliated Hospital of Nanjing Medical University, Jiangjiayuan road 121#, Nanjing, 210011, Jiangsu, P.R. China.
| |
Collapse
|
39
|
Abstract
Targeted treatment, which can specifically kill tumour cells without affecting normal cells, is a new approach for tumour therapy. However, tumour cells tend to acquire resistance to targeted drugs during treatment. Circular RNAs (circRNAs) are single-stranded RNA molecules with unique structures and important functions. With the development of RNA sequencing technology, circRNAs have been found to be widespread in tumour-resistant cells and to play important regulatory roles. In this review, we present the latest advances in circRNA research and summarize the various mechanisms underlying their regulation. Moreover, we review the role of circRNAs in the chemotherapeutic resistance of tumours and explore the clinical value of circRNA regulation in treating tumour resistance.
Collapse
Affiliation(s)
- Shuo Ma
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, NO.20, Xisi Road, Nantong, 226001, Jiangsu, China.,Research Center of Clinical Medicine, Affiliated Hospital of Nantong University, NO.20, Xisi Road, Nantong, 226001, Jiangsu, China.,School of Public Health, Nantong University, NO. 9, Seyuan Road, Nantong, 226019, Jiangsu, China
| | - Shan Kong
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, NO.20, Xisi Road, Nantong, 226001, Jiangsu, China.,Research Center of Clinical Medicine, Affiliated Hospital of Nantong University, NO.20, Xisi Road, Nantong, 226001, Jiangsu, China.,School of Public Health, Nantong University, NO. 9, Seyuan Road, Nantong, 226019, Jiangsu, China
| | - Feng Wang
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, NO.20, Xisi Road, Nantong, 226001, Jiangsu, China.
| | - Shaoqing Ju
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, NO.20, Xisi Road, Nantong, 226001, Jiangsu, China. .,School of Public Health, Nantong University, NO. 9, Seyuan Road, Nantong, 226019, Jiangsu, China.
| |
Collapse
|
40
|
Nie H, Wang Y, Liao Z, Zhou J, Ou C. The function and mechanism of circular RNAs in gastrointestinal tumours. Cell Prolif 2020; 53:e12815. [PMID: 32515024 PMCID: PMC7377939 DOI: 10.1111/cpr.12815] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [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: 01/19/2020] [Revised: 03/21/2020] [Accepted: 04/04/2020] [Indexed: 12/12/2022] Open
Abstract
Gastrointestinal tumours are tumours that originate in the digestive tract and have extremely high morbidity and mortality. The main categories include: oesophageal, gastric, and colorectal cancers. Circular RNAs are a new class of non‐coding RNAs with a covalent closed‐loop structure without a 5’ cap or a 3’ poly A tail, which can encode a small amount of polypeptide. Recent studies have shown that circRNAs are involved in multiple biological processes during the development of gastrointestinal tumours including proliferation, invasion and metastasis, radio‐ and chemoresistance, and inflammatory responses. Also, the clinical and pathological characteristics of the patient, such as staging and lymph node metastasis, are closely associated with the expression level of circRNAs. Further investigation of the function and the role of circRNAs in the development of gastrointestinal tumours will provide new directions for its clinical diagnosis and treatment.
Collapse
Affiliation(s)
- Hui Nie
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, China
| | - Yutong Wang
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, China
| | - Zhiming Liao
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, China.,Department of Pathology, the Fourth Hospital of Changsha, Changsha, China
| | - Jianhua Zhou
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, China
| | - Chunlin Ou
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, China
| |
Collapse
|
41
|
Zhou DN, Ye CS, Deng YF. CircRNAs: potency of protein translation and feasibility of novel biomarkers and therapeutic targets for head and neck cancers. Am J Transl Res 2020; 12:1535-1552. [PMID: 32509160 PMCID: PMC7270011] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 04/18/2020] [Indexed: 06/11/2023]
Abstract
Circular RNAs (circRNAs), a new star noncoding RNA (ncRNA), show stability, conservation, abundance, and tissue and stage specificity. They act as key regulators of biological processes. They target the mRNAs of many other different genes or signaling pathways, and closely link associated genes into regulatory networks. Growing evidence has demonstrated that circRNAs may play an important role in the carcinogenesis, progression and chemoradiation resistance of many cancers including head and neck cancers (HNC). CircRNA, like other ncRNA, such as miRNA, lncRNA, usually is considered to be non-protein coding transcript. However, recent studies indicated that abnormal translation of circRNAs may be involved in human diseases. In this review, we collected the origin, classification, characteristics, function of circRNAs, exosmal circRNAs, and then synthesize current study results to highlight aberration of circRNAs in various types of HNC, and try to clarify the molecular mechanisms of circRNAs affecting the pathogenesis and progression of HNC, as well as pay particular attention to provide a new avenue to the diagnosis and treatment strategy for HNC.
Collapse
Affiliation(s)
- Dong-Ni Zhou
- Department of Pathology, Zhongshan Hospital, Xiamen University209 Hubin South Road, Xiamen 361004, Fujian, China
| | - Chun-Sheng Ye
- Department of Otolaryngology-Head and Neck Surgery, Zhongshan Hospital, Xiamen University209 Hubin South Road, Xiamen 361004, Fujian, China
| | - Yan-Fei Deng
- Department of Otolaryngology-Head and Neck Surgery, Zhongshan Hospital, Xiamen University209 Hubin South Road, Xiamen 361004, Fujian, China
- Union School of Clinical Medicine, Fujian Medical UniversityFuzhou 350001, Fujian, China
| |
Collapse
|
42
|
Wen C, Xu G, He S, Huang Y, Shi J, Wu L, Zhou H. Screening Circular RNAs Related to Acquired Gefitinib Resistance in Non-small Cell Lung Cancer Cell Lines. J Cancer 2020; 11:3816-3826. [PMID: 32328186 PMCID: PMC7171488 DOI: 10.7150/jca.39783] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [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: 08/30/2019] [Accepted: 03/27/2020] [Indexed: 12/25/2022] Open
Abstract
Background: Gefitinib is a tyrosine kinase inhibitor (TKI) of epidermal growth factor receptor (EGFR) used to treat EGFR mutation-positive patients with non-small cell lung cancer (NSCLC). However, the efficacy of gefitinib is limited by the development of acquired resistance. Studies have shown that circular RNAs (circRNAs) are involved in the acquired resistance to many anticancer agents. However, the expression profiles and functions of circRNAs in gefitinib resistance in NSCLC are poorly understood so far. Methods: In this study, circRNA expression profiling was explored in two gefitinib-resistant NSCLC cell lines (HCC827/GR and PC9/GR) and their parental sensitive cells (HCC827 and PC9) using high-throughput RNA sequencing. Quantitative real-time PCR (qRT-PCR) was used to confirm the expression of selected differentially expressed circRNAs. Bioinformatic tools including gene ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), network analysis, and Kaplan-Meier plotter database were used to predict the functions and pathways of these differentially expressed circRNAs. Results: We identified 46 and 56 differentially expressed circRNAs in HCC827/GR and PC9/GR cell lines, respectively, compared with those in their parental cell lines. Gene ontology and KEGG pathway analysis identified that the host linear transcripts of these differentially expressed circRNAs were involved in many critical biological pathways and molecular functions. We found that hsa_circ_0000567 was consistently up-regulated, and hsa_circ_0006867 was consistently down-regulated in two resistant cell lines. We further used hsa_circ_0000567 and hsa_circ_0006867 as key circRNAs to construct circRNA-miRNA-mRNA networks. Several target mRNAs of these two circRNAs had been shown to significantly associate with the overall survival of patients with lung cancer. Conclusions: In this study, we generated the comprehensive expression and functional profiles of the differentially expressed circRNAs between gefitinib-resistant and -sensitive NSCLC cells, and showed that dysregulation of circRNAs might play an important role in the development of acquired resistance to gefitinib in NSCLC.
Collapse
Affiliation(s)
- Chunjie Wen
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Ge Xu
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Shuai He
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Yutang Huang
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Jingjing Shi
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Lanxiang Wu
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Honghao Zhou
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China.,Pharmacogenetics Research Institute, Institute of Clinical Pharmacology, Central South University, Changsha, China
| |
Collapse
|
43
|
Abstract
Background Currently, numerous studies indicate that circular RNA (circRNA) is associated with various human complex diseases. While identifying disease-related circRNAs in vivo is time- and labor-consuming, a feasible and effective computational method to predict circRNA-disease associations is worthy of more studies. Results Here, we present a new method called SIMCCDA (Speedup Inductive Matrix Completion for CircRNA-Disease Associations prediction) to predict circRNA-disease associations. Based on known circRNA-disease associations, circRNA sequence similarity, disease semantic similarity, and the computed Gaussian interaction profile kernel similarity, we used speedup inductive matrix completion to construct the model. The proposed SIMCCDA method obtains an area under ROC curve (AUC) of 0.8465 with leave-one-out cross validation in the dataset, which is obtained by the combination of the three databases (circRNA disease, circ2Disease and circR2Disease). Our method surpasses other state-of-art models in predicting circRNA-disease associations. Furthermore, we conducted case studies in breast cancer, stomach cancer and colorectal cancer for further performance evaluation. Conclusion All the results show reliable prediction ability of SIMCCDA. We anticipate that SIMCCDA could be utilized to facilitate further developments in the field and follow-up investigations by biomedical researchers.
Collapse
Affiliation(s)
- Menglu Li
- Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education, School of Computer Science and Technology, Anhui University, Hefei, 230601, Anhui, China
| | - Mengya Liu
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, Anhui, China
| | - Yannan Bin
- Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education, School of Computer Science and Technology, Anhui University, Hefei, 230601, Anhui, China.,Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, Anhui, China
| | - Junfeng Xia
- Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education, School of Computer Science and Technology, Anhui University, Hefei, 230601, Anhui, China. .,Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, Anhui, China.
| |
Collapse
|
44
|
Cui C, Yang J, Li X, Liu D, Fu L, Wang X. Functions and mechanisms of circular RNAs in cancer radiotherapy and chemotherapy resistance. Mol Cancer 2020; 19:58. [PMID: 32171304 PMCID: PMC7071709 DOI: 10.1186/s12943-020-01180-y] [Citation(s) in RCA: 108] [Impact Index Per Article: 27.0] [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: 12/09/2019] [Accepted: 03/05/2020] [Indexed: 12/16/2022] Open
Abstract
Circular RNAs (circRNAs), one type of non-coding RNA, were initially misinterpreted as nonfunctional products of pre-mRNA mis-splicing. Currently, circRNAs have been proven to manipulate the functions of diverse molecules, including non-coding RNAs, mRNAs, DNAs and proteins, to regulate cell activities in physiology and pathology. Accumulating evidence indicates that circRNAs play critical roles in tumor genesis, development, and sensitivity to radiation and chemotherapy. Radiotherapy and chemotherapy are two primary types of intervention for most cancers, but their therapeutic efficacies are usually retarded by intrinsic and acquired resistance. Thus, it is urgent to develop new strategies to improve therapeutic responses. To achieve this, clarification of the underlying mechanisms affecting therapeutic responses in cancer is needed. This review summarizes recent progress and mechanisms of circRNAs in cancer resistance to radiation and chemotherapy, and it discusses the limitations of available knowledge and potential future directions.
Collapse
Affiliation(s)
- Chaochu Cui
- Henan Key Laboratory of Medical Tissue Regeneration, College of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, China
| | - Jianbo Yang
- School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, Henan, China
| | - Xiao Li
- Henan Key Laboratory of Medical Tissue Regeneration, College of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, China
| | - Dongling Liu
- Henan Key Laboratory of Medical Tissue Regeneration, College of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, China
| | - Liwu Fu
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Xianwei Wang
- Henan Key Laboratory of Medical Tissue Regeneration, College of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, China.
| |
Collapse
|
45
|
Abstract
Circular RNA (circRNA) is an intriguing class of RNA with covalently closed-loop structure and is highly stable and conservative. As new members of the ncRNAs, the function, mechanism, potential diagnostic biomarker, and therapeutic target have raised increased attention. Most circRNAs are presented with characteristics of abundance, stability, conservatism, and often exhibiting tissue/developmental-stage-specific manner. Over 30,000 circRNAs have been identified with their unique structures to maintain stability more easily than linear RNAs. An increased numbers of circRNAs are dysregulated and involved in several biological processes of malignance, such as tumorigenesis, growth, invasion, metastasis, apoptosis, and vascularization. Emerging evidence suggests that circRNAs play important roles by acting as miRNA sponge or protein scaffolding, autophagy regulators, and interacting with RNA-binding protein (RBP), which may potentially serve as a novel promising biomarker for prevention, diagnosis and therapeutic target for treatment of human cancer with great significance either in scientific research or clinic arena. This review introduces concept, major features of circRNAs, and mainly describes the major biological functions and clinical relevance of circRNAs, as well as expressions and regulatory mechanisms in various types of human cancer, including pathogenesis, mode of action, potential target, signaling regulatory pathways, drug resistance, and therapeutic biomarkers. All of which provide evidence for the potential utilities of circRNAs in the diagnosis and treatment of cancer.
Collapse
Affiliation(s)
- Qing Tang
- Laboratory of Tumor Biology, The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou 510120, Guangdong Province, People's Republic of China
| | - Swei Sunny Hann
- Laboratory of Tumor Biology, The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou 510120, Guangdong Province, People's Republic of China
| |
Collapse
|
46
|
Jeyaraman S, Hanif EAM, Ab Mutalib NS, Jamal R, Abu N. Circular RNAs: Potential Regulators of Treatment Resistance in Human Cancers. Front Genet 2020; 10:1369. [PMID: 32047511 PMCID: PMC6997550 DOI: 10.3389/fgene.2019.01369] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [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: 05/31/2019] [Accepted: 12/16/2019] [Indexed: 01/06/2023] Open
Abstract
Circular RNAs (circRNAs) which were once considered as "junk" are now in the spotlight as a potential player in regulating human diseases, especially cancer. With the development of high throughput technologies in recent years, the full potential of circRNAs is being uncovered. CircRNAs possess some unique characteristics and advantageous properties that could benefit medical research and clinical applications. CircRNAs are stable with covalently closed loops that are resistant to ribonucleases, have disease stage-specific expressions and are selectively abundant in different types of tissues. Interestingly, the presence of circRNAs in different types of treatment resistance in human cancers was recently observed with the involvement of a few key pathways. The activation of certain pathways by circRNAs may give new insights to treatment resistance management. The potential usage of circRNAs from this aspect is very much in its infancy stage and has not been fully validated. This mini-review attempts to highlight the possible role of circRNAs as regulators of treatment resistance in human cancers based on its intersection molecules and cancer-related regulatory networks.
Collapse
Affiliation(s)
- Shivapriya Jeyaraman
- UKM Medical Molecular Biology Institute (UMBI), UKM Medical Center, Kuala Lumpur, Malaysia
| | | | | | - Rahman Jamal
- UKM Medical Molecular Biology Institute (UMBI), UKM Medical Center, Kuala Lumpur, Malaysia
| | - Nadiah Abu
- UKM Medical Molecular Biology Institute (UMBI), UKM Medical Center, Kuala Lumpur, Malaysia
| |
Collapse
|
47
|
Abstract
The tumour microenvironment (TME) constitutes the area surrounding the tumour during its development and has been demonstrated to play roles in cancer-related diseases through crosstalk with tumour cells. Circular RNAs (circRNAs) are a subpopulation of endogenous noncoding RNAs (ncRNAs) that are ubiquitously expressed in eukaryotes and have multiple biological functions in the regulation of cancer onset and progression. An increasing number of studies have shown that circRNAs participate in the multifaceted biological regulation of the TME. However, details on the mechanisms involved have remained elusive until now. In this review, we analyse the effects of circRNAs on the TME from various perspectives, including immune surveillance, angiogenesis, hypoxia, matrix remodelling, exo-circRNAs and chemoradiation resistance. Currently, the enormous potential for circRNA use in targeted therapy and as noninvasive biomarkers have drawn our attention. We emphasize the prospect of targeting circRNAs as an essential strategy to regulate TME, overcome cancer resistance and improve therapeutic outcomes.
Collapse
Affiliation(s)
- Qiuge Zhang
- Department of Geriatric Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.,Academy of Medical Sciences, Zhengzhou University, Zhengzhou, 450052, China
| | - Weiwei Wang
- Department of Pathology, The First Affiliated Hospital, Zhengzhou University, Zhengzhou, 450052, China
| | - Quanbo Zhou
- Department of Colorectal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Chen Chen
- Department of Colorectal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.,Academy of Medical Sciences, Zhengzhou University, Zhengzhou, 450052, China
| | - Weitang Yuan
- Department of Colorectal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Jinbo Liu
- Department of Colorectal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
| | - Xiaoli Li
- Department of Geriatric Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
| | - Zhenqiang Sun
- Department of Colorectal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China. .,Academy of Medical Sciences, Zhengzhou University, Zhengzhou, 450052, China.
| |
Collapse
|
48
|
Abstract
BACKGROUND Circular RNAs (circRNAs) are a new class of endogenous non-coding RNAs (ncRNAs) widely expressed in eukaryotic cells. Mounting evidence has highlighted circRNAs as critical regulators of various tumours. More importantly, circRNAs have been revealed to recruit and reprogram key components involved in the tumour microenvironment (TME), and mediate various signaling pathways, thus affecting tumourigenesis, angiogenesis, immune response, and metastatic progression. In this review, we briefly introduce the biogenesis, characteristics and classification of circRNAs, and describe various mechanistic models of circRNAs. Further, we provide the first systematic overview of the interplay between circRNAs and cellular/non-cellular counterparts of the TME and highlight the potential of circRNAs as prospective biomarkers or targets in cancer clinics. Finally, we discuss the biological mechanisms through which the circRNAs drive development of resistance, revealing the mystery of circRNAs in drug resistance of tumours. SHORT CONCLUSION Deep understanding the emerging role of circRNAs and their involvements in the TME may provide potential biomarkers and therapeutic targets for cancer patients. The combined targeting of circRNAs and co-activated components in the TME may achieve higher therapeutic efficiency and become a new mode of tumour therapy in the future.
Collapse
Affiliation(s)
- Zhonghua Ma
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Division of Gastrointestinal Cancer Translational Research Laboratory, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China.,Department of Gastrointestinal Surgery, Peking University Cancer Hospital, Beijing, People's Republic of China
| | - You Shuai
- Department of Medical Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, The Affiliated Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - Xiangyu Gao
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Division of Gastrointestinal Cancer Translational Research Laboratory, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China.,Department of Gastrointestinal Surgery, Peking University Cancer Hospital, Beijing, People's Republic of China
| | - Xianzi Wen
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Division of Gastrointestinal Cancer Translational Research Laboratory, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China
| | - Jiafu Ji
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Division of Gastrointestinal Cancer Translational Research Laboratory, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China. .,Department of Gastrointestinal Surgery, Peking University Cancer Hospital, Beijing, People's Republic of China.
| |
Collapse
|
49
|
Hon KW, Othman N, Hanif EAM, Nasir SN, Razak NSA, Jamal R, Abu N. Predictive biomarkers of drug resistance in colorectal cancer—Recent updates. Drug Resistance in Colorectal Cancer: Molecular Mechanisms and Therapeutic Strategies 2020:135-151. [DOI: 10.1016/b978-0-12-819937-4.00008-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
|
50
|
Geng X, Jia Y, Zhang Y, Shi L, Li Q, Zang A, Wang H. Circular RNA: biogenesis, degradation, functions and potential roles in mediating resistance to anticarcinogens. Epigenomics 2019; 12:267-283. [PMID: 31808351 DOI: 10.2217/epi-2019-0295] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Aim: This review aims to systematically describe the biogenesis and degradation of circular RNAs (circRNAs), discusses the major functions of circRNAs, introduces the mechanisms by which circRNAs play a role in cancer, comprehensively summarize the relationship between circRNAs and anticarcinogen resistance as well as underlying specific mechanisms in multiple cancers. Materials & methods: We screened and analyzed large quantity of scientific papers which associated with circRNAs, noncoding RNAs, function, cancer, drug resistance and chemoresistance, and then summarized in Figures 1 & 2 & Table 1. Results & conclusion: The biogenesis, degradation and function of circRNAs are specially compared with other noncoding RNAs, it can affect cancer pathogenesis and progression and are implicated in mediating resistance to various anticarcinogens in various types of cancer.
Collapse
Affiliation(s)
- Xiuchao Geng
- Faculty of Integrated Traditional Chinese & Western Medicine, Hebei University of Chinese Medicine, Shijiazhuang 050091, PR China
| | - Youchao Jia
- Department of Medical Oncology, Hebei Key Laboratory of Cancer Radiotherapy & Chemotherapy, Affiliated Hospital of Hebei University, Baoding 071000, PR China
| | - Yuhao Zhang
- Department of Neurosurgery, Affiliated Hospital of Hebei University, Baoding 071000, PR China
| | - Liang Shi
- Endoscopy Division, Department of General Surgery, Cangzhou Central Hospital, Cangzhou 061000, PR China
| | - Qiang Li
- Faculty of Acupuncture-Moxibustion & Tuina, Hebei University of Chinese Medicine, Shijiazhuang 050091, PR China
| | - Aimin Zang
- Department of Medical Oncology, Hebei Key Laboratory of Cancer Radiotherapy & Chemotherapy, Affiliated Hospital of Hebei University, Baoding 071000, PR China
| | - Hong Wang
- Faculty of Integrated Traditional Chinese & Western Medicine, Hebei University of Chinese Medicine, Shijiazhuang 050091, PR China
| |
Collapse
|