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Biswal P, Lalruatfela A, Behera SK, Biswal S, Mallick B. miR-203a-A multifaceted regulator modulating cancer hallmarks and therapy response. IUBMB Life 2024; 76:108-124. [PMID: 37792370 DOI: 10.1002/iub.2786] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 09/05/2023] [Indexed: 10/05/2023]
Abstract
MicroRNAs (miRNAs) are a class of noncoding RNAs of about 19-25 nucleotides, which serve as critical modulators of various cellular and biological processes by target gene regulation. Dysregulated expression of miRNAs modulates the pathophysiology of various human diseases, including cancer. Among miRNAs, miR-203a is one of the most extensively researched dysregulated miRNAs in different cancers. Our review investigated the roles of miR-203a in the hallmarks of cancer modulating different pathways through target gene regulations, chemoresistance, its crosstalk with other ncRNAs or genes in terms of ceRNAs impacting oncogenesis, and its potential applications in the diagnosis, prognosis, and chemotherapeutic responses in different cancer types. miR-203a impacts cancer cell behavior by regulating these exclusive hallmarks- sustaining proliferation, cell growth, invasion and metastasis, cell death, and angiogenesis. Besides, miR-203a is found in human circulating biofluids like plasma or serum of colorectal cancer, cervical cancer, and hepatocellular carcinoma, hinting at its potential as a biomarker. Further, miR-203a is involved in enhancing the chemosensitivity of cisplatin, docetaxel, paclitaxel, doxorubicin, and 5-fluorouracil in a variety of malignancies through their cognate target genes. These results suggest that miR-203a is a crucial multifaceted miRNA that controls cancer cell proliferation, metastasis, and chemotherapy response, shedding new light on its possible application.
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Affiliation(s)
- Priyajit Biswal
- RNAi and Functional Genomics Lab., Department of Life Science, National Institute of Technology, Rourkela, Odisha, India
| | - Anthony Lalruatfela
- RNAi and Functional Genomics Lab., Department of Life Science, National Institute of Technology, Rourkela, Odisha, India
| | - Subham Kumar Behera
- RNAi and Functional Genomics Lab., Department of Life Science, National Institute of Technology, Rourkela, Odisha, India
| | - Sruti Biswal
- RNAi and Functional Genomics Lab., Department of Life Science, National Institute of Technology, Rourkela, Odisha, India
| | - Bibekanand Mallick
- RNAi and Functional Genomics Lab., Department of Life Science, National Institute of Technology, Rourkela, Odisha, India
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Haseli R, Honarvar M, Yavari K, Ghavami M. Synergistic anticancer effects of crocin combined with deuterium-depleted water on HT-29 cells. Anticancer Drugs 2023; 34:1162-1170. [PMID: 36847076 DOI: 10.1097/cad.0000000000001512] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Colorectal cancer is one of the most common types of cancer in the world and the study of the role of nutrients in preventing or inhibiting the growth of this cancer is of interest to scientists. In this article, the synergistic effect of deuterium-depleted water(DDW) and crocin at specific concentrations on HT-29 cells was investigated. In this regard, HT-29 cells were grown in RPMI medium containing DDW, alone and in combination with crocin for 24, 48 and 72 h. Cell viability, cell cycle changes and antioxidant enzymes status were determined by MTT assay, flow cytometry and quantitative luminescence methods, respectively. The results of these analyses proved the cell growth inhibitory effect of deuterium alone and its synergistic effect in combination with crocin. The cell cycle analysis showed an increase in the number of cells in the G0 and G1 phases whereas there was a decrease in the number of cells in the S, G2 and M phases. The activities of superoxide dismutase and catalase enzymes also decreased compared to the control group that is a reason to increase Malonyl dialdehyde factor. The results suggested that a combination of DDW and crocin can open a new strategic approach in the prevention and treatment of colorectal cancer.
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Affiliation(s)
- Reza Haseli
- Department of Food Science and Technology, Science and Research Branch, Islamic Azad University
| | - Masoud Honarvar
- Department of Food Science and Technology, Science and Research Branch, Islamic Azad University
| | - Kamal Yavari
- Nuclear Science and Technology Research Institute, Tehran, Iran
| | - Mehrdad Ghavami
- Department of Food Science and Technology, Science and Research Branch, Islamic Azad University
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3
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Chen Z, Cheng H, Zhang J, Jiang D, Chen G, Yan S, Chen W, Zhan W. Hsa_circRNA_102051 regulates colorectal cancer proliferation and metastasis by mediating Notch pathway. Cancer Cell Int 2023; 23:230. [PMID: 37794386 PMCID: PMC10552285 DOI: 10.1186/s12935-023-03026-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 08/10/2023] [Indexed: 10/06/2023] Open
Abstract
BACKGROUND The purpose of this study was to investigate the role of hsa_circRNA_102051 in colorectal cancer (CRC) and its effect on the stemness of tumor cells. METHODS CircRNA microarray was under analysis to screen differentially expressed novel circRNAs in the pathology of CRC. Quantitative real-time PCR was used to detect the relative RNA expression in CRC cells and samples. The effects of hsa_circRNA_102051 on biological functions in CRC cells were accessed both in vitro and in vivo. FISH, RIP and luciferase reporter assay were conducted to confirm the regulatory correlations between hsa_circRNA_102051 and miR-203a, as well as miR-203a and BPTF. Xenograft models were applied to further verify the impacts and fluctuations of hsa_circRNA_102051/miR-203a/BPTF. Moreover, the mechanism how hsa_circRNA_102051 affected the Notch signals was also elucidated. RESULTS Hsa_circRNA_102051 was up-regulated in CRC tissues and cell lines, capable to promote the growth and invasion of CRC. In addition, hsa_circRNA_102051 could enhance stemness of CRC cells. BPTF was identified as downstream factors of hsa_circRNA_102051, and miR-203a was determined directly targeting both hsa_circRNA_102051 and BPTF as an intermediate regulator. Hsa_circRNA_102051 in CRC could block miR-203a expression, and subsequently activated BPTF. Hsa_circRNA_102051/miR-203a/BPTF axis modulated stemness of CRC cells by affecting Notch pathway. CONCLUSIONS Our findings provided new clues that hsa_circRNA_102051 might be a potential predictive or prognostic factor in CRC, which induced the fluctuation of downstream miR-203a/BPTF, and subsequently influenced tumor growth, activities and stemness. Thereinto, the Notch signals were also involved. Hence, the hsa_circRNA_102051/miR-203a/BPTF axis could be further explored as a therapeutic target for anti-metastatic therapy in CRC patients.
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Affiliation(s)
| | | | | | | | - Gang Chen
- Guizhou Medical University, Guiyang, China
| | | | - Wen Chen
- Guizhou Medical University, Guiyang, China
| | - Wei Zhan
- Department of colorectal surgery, The Affiliated Hospital of Guizhou Medical University, No.28 Guiyi Street, Yunyan District, Guiyang City, 550004, Guizhou, China.
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Jiang Q, Miao J, Wu F, Li F, Zhang J, Jing X, Cai S, Ma X, Wang X, Zhao L, Huang C. RNF6 promotes gastric cancer progression by regulating CCNA1/CREBBP transcription. Cell Cycle 2023; 22:2018-2037. [PMID: 37904524 PMCID: PMC10761170 DOI: 10.1080/15384101.2023.2275899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 10/21/2023] [Indexed: 11/01/2023] Open
Abstract
Ring finger protein 6 (RNF6) is a member of the E3 ubiquitin ligase family. Previous studies have reported the involvement of RNF6 as a ubiquitin ligase in the progression of gastric cancer (GC). However, this study found that RNF6 has a clear localization in the nucleus of GC, indicating a role other than ubiquitin ligase. Further chromatin immunoprecipitation sequencing (ChIP-seq) analysis revealed that RNF6 has DNA binding and transcriptional regulatory effects and is involved in important pathways such as tumor cell cycle and apoptosis. Cyclin A1 (CCNA1) and CREB binding protein (CREBBP) are downstream targets for RNF6 transcription regulation in GC. RNF6 binds to the promoter region of CCNA1/CREBBP and is actively regulating their expression in GC cells. Silencing CCNA1/CREBBP partially reversed the promoting effect of RNF6 overexpression on the biological function of GC cells. Our study suggests that RNF6 promotes the progression of GC by regulating CCNA1/CREBBP transcription.
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Affiliation(s)
- Qiuyu Jiang
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, China
| | - Jiyu Miao
- Department of Hematology, The Second Affiliated Hospital, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Fei Wu
- Department of Oncology, The Second Affiliated Hospital, Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Fang Li
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, China
| | - Jinyuan Zhang
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, China
| | - Xintao Jing
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, China
| | - Shuang Cai
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, China
| | - Xiaoping Ma
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, China
| | - Xiaofei Wang
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, China
| | - Lingyu Zhao
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, China
| | - Chen Huang
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, China
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Wang L, Lv Q, Guo J, Wang J, Pan J. Transcriptome Profiling and Network Analysis Provide Insights Into the Pathogenesis of Vulvar Lichen Sclerosus. Front Genet 2022; 13:905450. [PMID: 35783265 PMCID: PMC9247155 DOI: 10.3389/fgene.2022.905450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 05/02/2022] [Indexed: 11/13/2022] Open
Abstract
Vulvar lichen sclerosus (VLS) is a chronic inflammatory dermatosis that affects female anogenital skin. Although VLS is considered a T cell-mediated autoimmune disease, the diagnosis criteria, molecular mechanism, and universally accepted therapies for this disease remain largely unresolved. To explore disease pathogenesis and potential biomarkers, we performed an RNA-Seq-based transcriptome analysis to profile the gene expression of VLS lesions. Differentially expressed gene (DEG) analysis revealed profound changes in expressions of coding genes, microRNAs, and long non-coding RNAs. Pathway and network analysis suggested that T cell activation-associated genes, including CD3G, CD3D, CD8B, LAT, LCK, ZAP70, CCR5, CXCR3, CXCL9, CXCL10, and CXCL11, were highly expressed in VLS, while NR4A family genes (NR4A1, NR4A2, NR4A3), whose coding products inhibit T cell activity, were significantly downregulated, suggesting heightened T cell response in VLS. Neutrophil chemoattractant genes CXCL1, CXCL2, CXCL3, CXCL8, and their cognate receptor CXCR2 were downregulated, suggesting dampened neutrophil activity. We also found the downregulation of genes involved in cell cycle progression, including cyclins (CCNB1, CCNB2, CCNL1, CCNE1, and CCNK) and centrosome factors (CENPA, CENPE, CENPF, and CENPN), while microRNA-203a and let-7, microRNAs known to inhibit cell growth, were found to be upregulated. These data collectively indicate that cell proliferation in VLS is compromised. In sum, these findings comprehensively deciphered key regulatory genes and networks in VLS, which could further our understanding of disease mechanisms and point toward therapeutic strategies.
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Affiliation(s)
- Lingyan Wang
- Department of Dermatology, Beijing Jishuitan Hospital, Beijing, China
| | - Qingqing Lv
- Department of Obstetrics and Gynecology, Beijing Jishuitan Hospital, Beijing, China
| | - Jiayi Guo
- Department of Obstetrics and Gynecology, Beijing Jishuitan Hospital, Beijing, China
| | - Jianwei Wang
- Department of Urology, Beijing Jishuitan Hospital, Beijing, China
- *Correspondence: Jianwei Wang, ; Jing Pan,
| | - Jing Pan
- Department of Dermatology, Beijing Jishuitan Hospital, Beijing, China
- *Correspondence: Jianwei Wang, ; Jing Pan,
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Wu W, Zhang X, He F, Wu L. High expression of ring finger protein 115 contributes to the progression of colorectal cancer via WNT/β-catenin pathway. Mol Cell Toxicol 2022. [DOI: 10.1007/s13273-021-00211-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Wang L, Gao Y, Tong D, Wang X, Guo C, Guo B, Yang Y, Zhao L, Zhang J, Yang J, Qin Y, Liu L, Huang C. MeCP2 drives hepatocellular carcinoma progression via enforcing HOXD3 promoter methylation and expression through the HB-EGF/EGFR pathway. Mol Oncol 2021; 15:3147-3163. [PMID: 34028973 PMCID: PMC8564637 DOI: 10.1002/1878-0261.13019] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/21/2021] [Accepted: 05/20/2021] [Indexed: 12/31/2022] Open
Abstract
Homeobox D3 (HOXD3), a member of the homeobox family, was described to regulate tumorigenesis, invasion, metastasis, and angiogenesis in various tumor types. However, the molecular mechanisms regulating HOXD3 during hepatocellular carcinoma (HCC) migration, invasion, and angiogenesis remain elusive. In this study, we demonstrated that HOXD3 expression is enhanced by the binding of methyl-CpG-binding protein 2 (MeCP2), a methyl-CpG binding protein, together with CREB1to the hypermethylated promoter of HOXD3. Inhibition of HOXD3 eliminated the tumorigenic effects of MeCP2 on HCC cells. Furthermore, HOXD3 directly targeted the promoter region of heparin-binding epidermal growth factor (HB-EGF) via the EGFR-ERK1/2 cell signaling pathway and promoted invasion, metastasis, and angiogenesis of HCC in vitro and in vivo. Additionally, elevated expression of MeCP2, CREB1, and HB-EGF in HCC correlated with a poor survival rate. Our findings reveal the function of the MeCP2/HOXD3/HB-EGF regulatory axis in HCC, rendering it an attractive candidate for the development of targeted therapeutics and as a potential biomarker in patients with HCC.
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Affiliation(s)
- Lumin Wang
- Department of Digestive Diseases in Precision Medicine Institutethe Second Affiliated Hospital of Xi'an Jiaotong UniversityChina
| | - Yi Gao
- Department of cell Biology and GeneticsSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
- Yan'an Key Laboratory of Chronic Disease Prevention and ResearchChina
| | - Dongdong Tong
- Department of cell Biology and GeneticsSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
- Key Laboratory of Environment and Genes Related to DiseasesXi'an Jiaotong University Health Science CenterChina
- Institute of Genetics and Developmental BiologyTranslational Medicine InstituteSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
| | - Xiaofei Wang
- Department of cell Biology and GeneticsSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
- Key Laboratory of Environment and Genes Related to DiseasesXi'an Jiaotong University Health Science CenterChina
- Institute of Genetics and Developmental BiologyTranslational Medicine InstituteSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
| | - Chen Guo
- Department of cell Biology and GeneticsSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
| | - Bo Guo
- Department of cell Biology and GeneticsSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
- Key Laboratory of Environment and Genes Related to DiseasesXi'an Jiaotong University Health Science CenterChina
- Institute of Genetics and Developmental BiologyTranslational Medicine InstituteSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
| | - Yang Yang
- Department of cell Biology and GeneticsSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
- Key Laboratory of Environment and Genes Related to DiseasesXi'an Jiaotong University Health Science CenterChina
- Institute of Genetics and Developmental BiologyTranslational Medicine InstituteSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
| | - Lingyu Zhao
- Department of cell Biology and GeneticsSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
- Key Laboratory of Environment and Genes Related to DiseasesXi'an Jiaotong University Health Science CenterChina
- Institute of Genetics and Developmental BiologyTranslational Medicine InstituteSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
| | - Jing Zhang
- Yan'an Key Laboratory of Chronic Disease Prevention and ResearchChina
| | - Juan Yang
- Department of cell Biology and GeneticsSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
- Key Laboratory of Environment and Genes Related to DiseasesXi'an Jiaotong University Health Science CenterChina
- Institute of Genetics and Developmental BiologyTranslational Medicine InstituteSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
| | - Yannan Qin
- Department of cell Biology and GeneticsSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
- Key Laboratory of Environment and Genes Related to DiseasesXi'an Jiaotong University Health Science CenterChina
- Institute of Genetics and Developmental BiologyTranslational Medicine InstituteSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
| | - Liying Liu
- Key Laboratory of Environment and Genes Related to DiseasesXi'an Jiaotong University Health Science CenterChina
- Institute of Genetics and Developmental BiologyTranslational Medicine InstituteSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
| | - Chen Huang
- Department of cell Biology and GeneticsSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
- Key Laboratory of Environment and Genes Related to DiseasesXi'an Jiaotong University Health Science CenterChina
- Institute of Genetics and Developmental BiologyTranslational Medicine InstituteSchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterChina
- Cardiovascular Research CenterXi'an Jiaotong University Health Science CenterChina
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RNF6 as an Oncogene and Potential Therapeutic Target—A Review. BIOTECH 2020; 9:biotech9040022. [PMID: 35822825 PMCID: PMC9258312 DOI: 10.3390/biotech9040022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 10/08/2020] [Accepted: 11/10/2020] [Indexed: 12/15/2022] Open
Abstract
The RNF6 gene encodes Ring Finger Protein 6 (RNF6), which functions as a ubiquitin ligase. Its functions are not entirely known, but research shows that it is involved in human cancer development. Initially, this gene was considered to be a tumor suppressor. Numerous statistical analyses on cell lines and animals indicate, however, that RNF6 functions as an oncogene, involved in signaling pathways, including SHP1/STAT3, AKT/mTOR, Wnt/β-catenin, or ERα/Bcl-xL. Due to this fact, it has become a potential prognostic factor and therapeutic target. Studies in tumor cells and model organisms using inhibitors such as total saponins from Paris forrestii (TSPf), ellagic acid, or microRNA molecules show the effectiveness of inhibiting RNF6, and through it, the pathways of tumor cell proliferation. The results of the currently available studies are promising, but the function of RNF6 is not fully understood. More research is needed to assess the role of RNF6 and to check the safety and efficacy of inhibitors.
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PD-1/PD-L1 axis regulation in cancer therapy: The role of long non-coding RNAs and microRNAs. Life Sci 2020; 256:117899. [DOI: 10.1016/j.lfs.2020.117899] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 05/31/2020] [Accepted: 05/31/2020] [Indexed: 02/07/2023]
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Zhao JP, Chen LL. Circular RNA MAT2B Induces Colorectal Cancer Proliferation via Sponging miR-610, Resulting in an Increased E2F1 Expression. Cancer Manag Res 2020; 12:7107-7116. [PMID: 32848465 PMCID: PMC7429114 DOI: 10.2147/cmar.s251180] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 06/19/2020] [Indexed: 12/12/2022] Open
Abstract
Purpose Recently, studies have demonstrated that a novel circular RNA (circRNA), circMAT2B, can promote cell proliferation and can thus contribute to the growth and development of hepatocellular carcinoma. However, the precise mechanisms underlying in circMAT2B-induced colorectal cancer (CRC) cell proliferation are not yet fully understood. Materials and Methods Quantitative reverse transcription polymerase chain reaction was conducted to evaluate circMAT2B expression in 70 CRC tissues and 70 matched adjacent normal tissues, CRC cell lines and human colonic epithelial cell line (NCM460). The direct interaction between miR-610 and circMAT2B or E2F1 was verified using luciferase reporter assay and biotinylated RNA Pull-down assay. Cell Counting Kit-8, colony formation assay, flow cytometry were utilized to examine the effect of circMAT2B, miR-610 and E2F1 on cell proliferation. Western blot was conducted to evaluate E2F1 expression. Results In our study, circMAT2B was found to be upregulated in CRC tissues and cell lines. Furthermore, the silencing of circMAT2B significantly inhibited proliferation. Hence, in order to investigate the mechanism underlying the oncogenic properties of circMAT2B in CRC, a bioinformatics analysis (circular RNA Interactome, https://circinteractome.nia.nih.gov/) was performed to screen the putative interacting microRNAs of circMAT2B. miR-610 was identified to be one of the potential targeted miRNAs of circMAT2B. Luciferase reporter and RNA pulldown assay confirmed a direct interaction between circMAT2B and miR-610. Moreover, circMAT2B expression was negatively correlated with the expression of miR-610 in CRC tissues (r=−0.5131, p<0.0001). Furthermore, we demonstrated circMAT2B upregulated expression levels of the miR-610 target gene E2F1, which is involved in cell proliferation, is overexpression in a broad range of human cancer including CRC. Further studies suggested that E2F1 upregulation could significantly reverse the si-circMAT2B-mediated inhibition of proliferation. Conclusion circMAT2B is upregulated in CRC tissues and cell lines. Moreover, circMAT2B promoted CRC proliferation by regulating the miR-610/E2F1 axis, which may serve as a potential therapeutic target for CRC treatment.
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Affiliation(s)
- Jian Pei Zhao
- Department of Anus & Intestine Surgery, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo 315010, Zhejiang, People's Republic of China
| | - Li Li Chen
- Department of Hematology and Oncology, The First People's Hospital of Taizhou, Taizhou 318020, Zhejiang, People's Republic of China
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