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Zhang Y, Sheng H, Fu Y, Chen L. Transcription Factor FOXA1 Facilitates Glycolysis and Proliferation of Lung Adenocarcinoma via Activation of TEX19. Mol Biotechnol 2024; 66:2144-2154. [PMID: 37606876 DOI: 10.1007/s12033-023-00848-2] [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: 02/23/2023] [Accepted: 08/02/2023] [Indexed: 08/23/2023]
Abstract
Glycolysis is a shared feature in various cancers including lung adenocarcinoma (LUAD). Testis Expressed 19 (TEX19) is correlated with cancer progression. But its effect on LUAD remains an unanswered question. The focus of our study was primarily to investigate how TEX19 works exactly in LUAD. We first downloaded mRNA data from TCGA-LUAD and performed differential expression analysis. Then, we performed a Kaplan-Meier analysis to analyze the relationship between mRNA expression and patients' prognoses. hTFtarget database was utilized for the prediction of upstream transcription factors of mRNA. Next, qRT-PCR was employed for detecting TEX19 and Forkhead box A1 (FOXA1) expression. Western blot was adopted to detect the expression of glycolysis-related proteins. We also used CCK-8, colony formation, and flow cytometry assays to detect cell viability, proliferation, and apoptosis. Seahorse XF Extracellular Flux Analyzers were introduced to analyze extracellular acidification rate (ECAR) and oxygen consumption rate (OCR). Detection kits were used to detect pyruvate, lactate, citric acid, and malic acid. TEX19 was highly expressed in LUAD tissues. Real-time quantitative PCR (qRT-PCR) assay showed that TEX19 was significantly overexpressed in LUAD cell lines compared with normal bronchial epithelial cells BEAS-2B. Knockdown of TEX19 remarkably inhibited cell activity and proliferation, and promoted cell apoptosis, TEX19 was enriched in the glycolytic pathway. Meanwhile, the knockdown of TEX19 significantly hampered the contents of pyruvate, lactate, citric acid, and malic acid. The bioinformatics analysis, dual luciferase reporter experiment, and chromatin immunoprecipitation (ChIP) assay showed that FOXA1 was bound with TEX19. FOXA1 had a high expression level in LUAD. The rescue assay demonstrated that FOXA1, by activating TEX19 expression, enhanced glycolysis and proliferation and inhibited apoptosis of LUAD cells. In summary, FOXA1 promoted glycolysis and proliferation of LUAD cells by activating TEX19. This result can provide a theoretical basis for future research on LUAD.
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Affiliation(s)
- Yanfei Zhang
- Department of Pathology, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, 365 Renmin East Road, Jinhua City, 321000, Zhejiang Province, China.
| | - Huichao Sheng
- Department of Pathology, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, 365 Renmin East Road, Jinhua City, 321000, Zhejiang Province, China
| | - Yuan Fu
- Department of Pathology, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, 365 Renmin East Road, Jinhua City, 321000, Zhejiang Province, China
| | - Lin Chen
- Central Laboratory, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua City, 321000, Zhejiang Province, China
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Yan S, Wang Z, Lan D, Niu J, Jian X, He F, Tang W, Hu C, Liu W. Circ_PABPC1 promotes the malignancy of gastric cancer through interacting with ILK to activate NF-κB pathway. Exp Cell Res 2024; 438:114058. [PMID: 38688434 DOI: 10.1016/j.yexcr.2024.114058] [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: 02/17/2024] [Revised: 04/22/2024] [Accepted: 04/24/2024] [Indexed: 05/02/2024]
Abstract
BACKGROUND Gastric cancer (GC) is a common cancer type with both high incidence and mortality. Recent studies have revealed an important role of circRNA in the development of GC. However, more experiments are needed to reveal the precise molecular mechanisms of circRNA in GC development. METHODS Bioinformatics analysis was conducted to predict the potential role of circ_PABPC1 in GC and the target proteins of circ_PABPC1. Quantitative RT-PCR, Western blot and immunohistochemistry assays were conducted to detect the levels of circ_PABPC1, NF-κB p65, NF-κB p65 (Ser536) and ILK. MTT, Edu staining, cell scratch-wound and trans-well assays were carried out to detect cell proliferation, migration and invasion. The interaction between ILK and circ_PABPC1 was confirmed by RNA immunoprecipitation (RIP), RNA pull-down and fluorescence in situ hybridization assays. Genetically modified GC cells were injected into mice to evaluate the tumor growth performance. RESULTS This study found that the high expression of circ_PABPC1 was associated with a poor prognosis of GC. The up-regulation of circ_PABPC1 promoted the proliferation, migration and invasion of GC cells. Circ_PABPC1 bound to ILK protein, thereby preventing the degradation of ILK. ILK mediated the effect of circ_PABPC1 on GC cells through activating NF-κB. CONCLUSION circ_PABPC1 promotes the malignancy of GC cells through binding to ILK to activate NF-κB signaling pathway.
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Affiliation(s)
- Siqi Yan
- Departments of Oncology, The Second Xiangya Hospital of Central-South University, Changsha, Hunan, 410011, China; Departments of Radiotherapy, Hunan Provincial Hospital of Integrated Chinese and Western Medicine, The Affiliated Hospital of Hunan Academy of Traditional Chinese Medicine, Changsha, Hunan, 410006, China
| | - Zhu Wang
- Departments of Radiotherapy, Hunan Provincial Hospital of Integrated Chinese and Western Medicine, The Affiliated Hospital of Hunan Academy of Traditional Chinese Medicine, Changsha, Hunan, 410006, China
| | - Dongqiang Lan
- Departments of Radiotherapy, Hunan Provincial Hospital of Integrated Chinese and Western Medicine, The Affiliated Hospital of Hunan Academy of Traditional Chinese Medicine, Changsha, Hunan, 410006, China
| | - Junjie Niu
- Departments of Radiotherapy, Hunan Provincial Hospital of Integrated Chinese and Western Medicine, The Affiliated Hospital of Hunan Academy of Traditional Chinese Medicine, Changsha, Hunan, 410006, China
| | - Xiaolan Jian
- Departments of Radiotherapy, Hunan Provincial Hospital of Integrated Chinese and Western Medicine, The Affiliated Hospital of Hunan Academy of Traditional Chinese Medicine, Changsha, Hunan, 410006, China
| | - Fengjiao He
- Departments of Radiotherapy, Hunan Provincial Hospital of Integrated Chinese and Western Medicine, The Affiliated Hospital of Hunan Academy of Traditional Chinese Medicine, Changsha, Hunan, 410006, China; Departments of Oncology, Xiangya Hospital of Central-South University, Changsha, Hunan, 410008, China
| | - Weizhi Tang
- Departments of Radiotherapy, Hunan Provincial Hospital of Integrated Chinese and Western Medicine, The Affiliated Hospital of Hunan Academy of Traditional Chinese Medicine, Changsha, Hunan, 410006, China
| | - Chunhong Hu
- Departments of Oncology, The Second Xiangya Hospital of Central-South University, Changsha, Hunan, 410011, China.
| | - Wei Liu
- Departments of Radiotherapy, Hunan Provincial Hospital of Integrated Chinese and Western Medicine, The Affiliated Hospital of Hunan Academy of Traditional Chinese Medicine, Changsha, Hunan, 410006, China.
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Wu S, Yang Y, Zhang M, Khan AU, Dai J, Ouyang J. Serpin peptidase inhibitor, clade E, member 2 in physiology and pathology: recent advancements. Front Mol Biosci 2024; 11:1334931. [PMID: 38469181 PMCID: PMC10927012 DOI: 10.3389/fmolb.2024.1334931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 02/01/2024] [Indexed: 03/13/2024] Open
Abstract
Serine protease inhibitors (serpins) are the most numerous and widespread multifunctional protease inhibitor superfamily and are expressed by all eukaryotes. Serpin E2 (serpin peptidase inhibitor, clade E, member 2), a member of the serine protease inhibitor superfamily is a potent endogenous thrombin inhibitor, mainly found in the extracellular matrix and platelets, and expressed in numerous organs and secreted by many cell types. The multiple functions of serpin E2 are mainly mediated through regulating urokinase-type plasminogen activator (uPA, also known as PLAU), tissue-type plasminogen activator (tPA, also known as PLAT), and matrix metalloproteinase activity, and include hemostasis, cell adhesion, and promotion of tumor metastasis. The importance serpin E2 is clear from its involvement in numerous physiological and pathological processes. In this review, we summarize the structural characteristics of the Serpin E2 gene and protein, as well as its roles physiology and disease.
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Affiliation(s)
- Shutong Wu
- Guangdong Provincial Key Laboratory of Digital Medicine and Biomechanics, Guangdong Engineering Research Center for Translation of Medical 3D Printing Application, National Virtual & Reality Experimental Education Center for Medical Morphology (Southern Medical University), National Key Discipline of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
- Xinjin Branch of Chengdu Municipal Public Security Bureau, Chengdu, China
| | - Yuchao Yang
- Guangdong Provincial Key Laboratory of Digital Medicine and Biomechanics, Guangdong Engineering Research Center for Translation of Medical 3D Printing Application, National Virtual & Reality Experimental Education Center for Medical Morphology (Southern Medical University), National Key Discipline of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
- Yue Bei People’s Hospital Postdoctoral Innovation Practice Base, Southern Medical University, Guangzhou, China
| | - Meiling Zhang
- Chengdu Municipal Public Security Bureau Wenjiang Branch, Chengdu, China
| | - Asmat Ullah Khan
- Guangdong Provincial Key Laboratory of Digital Medicine and Biomechanics, Guangdong Engineering Research Center for Translation of Medical 3D Printing Application, National Virtual & Reality Experimental Education Center for Medical Morphology (Southern Medical University), National Key Discipline of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Jingxing Dai
- Guangdong Provincial Key Laboratory of Digital Medicine and Biomechanics, Guangdong Engineering Research Center for Translation of Medical 3D Printing Application, National Virtual & Reality Experimental Education Center for Medical Morphology (Southern Medical University), National Key Discipline of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Jun Ouyang
- Guangdong Provincial Key Laboratory of Digital Medicine and Biomechanics, Guangdong Engineering Research Center for Translation of Medical 3D Printing Application, National Virtual & Reality Experimental Education Center for Medical Morphology (Southern Medical University), National Key Discipline of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
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Li Z, Fu Y, Ouyang W, He M, Wang Y, Wang X, Tan W. Circ_0016347 Promotes Osteosarcoma Progression by Regulating miR-1225-3p/KCNH1 Axis. Cancer Biother Radiopharm 2023; 38:619-631. [PMID: 33764794 DOI: 10.1089/cbr.2019.3349] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background: Osteosarcoma (OS) is a common malignant bone cancer and usually occurs in adolescents and children. Circular RNAs (circRNAs) play essential roles in tumor development and progression. This study aimed to explore the function and molecular basis of circ_0016347 in OS progression. Materials and Methods: The levels of circ_0016347, miR-1225-3p, and ether à go-go 1 (KCNH1) were measured by quantitative real-time polymerase chain reaction or Western blot assay. Cell proliferation was assessed by 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide (MTT) assay and colony formation assay. Cell migration and invasion were evaluated by transwell assay. Glucose consumption and lactate production were detected by glucose detection and lactic acid detection kits. The levels of Ki-67, matrix metalloproteinase-9 (MMP-9), and hexokinase-2 (HK2) were examined by Western blot assay. The interaction among circ_0016347, miR-1225-3p, and KCNH1 was validated by dual-luciferase reporter assay. Xenograft assay was conducted to analyze tumor growth in vivo. Results: Circ_0016347 and KCNH1 were upregulated, while miR-1225-3p was downregulated in OS tissues or cells. Circ_0016347 and KCNH1 promoted proliferation, migration, invasion, and glycolysis of OS cells. Circ_0016347 regulated OS progression by modulating KCNH1. Circ_0016347 was a sponge of miR-1225-3p, and miR-1225-3p targeted KCNH1. Circ_0016347 regulated KCNH1 expression via sponging miR-1225-3p. Moreover, silencing of circ_0016347 inhibited tumor growth in vivo. Conclusion: Circ_0016347 contributed to OS progression through the miR-1225-3p/KCNH1 axis, which might provide a promising biomarker for OS therapy.
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Affiliation(s)
- Zhengmao Li
- Department of Traumatic Orthopedics, The Second Affiliated Hospital, University of South China, Hengyang, China
| | - Yong Fu
- Department of Traumatic Orthopedics, The Second Affiliated Hospital, University of South China, Hengyang, China
| | - Wei Ouyang
- Department of Oncology, The Affiliated Zhuzhou Hospital of Xiangya Medical College CSU, Zhuzhou, China
| | - Min He
- Department of Traumatic Orthopedics, The Second Affiliated Hospital, University of South China, Hengyang, China
| | - Yu Wang
- Department of Clinical Laboratory, The Second Affiliated Hospital, University of South China, Hengyang, China
| | - Xin Wang
- Department of Traumatic Orthopedics, The Second Affiliated Hospital, University of South China, Hengyang, China
| | - Wenfu Tan
- Department of Traumatic Orthopedics, The Second Affiliated Hospital, University of South China, Hengyang, China
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Li M, Wang Y, Wu P, Zhang S, Gong Z, Liao Q, Guo C, Wang F, Li Y, Zeng Z, Yan Q, Xiong W. Application prospect of circular RNA-based neoantigen vaccine in tumor immunotherapy. Cancer Lett 2023; 563:216190. [PMID: 37062328 DOI: 10.1016/j.canlet.2023.216190] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/04/2023] [Accepted: 04/13/2023] [Indexed: 04/18/2023]
Abstract
Neoantigen is a protein produced by mutant gene, which is only expressed in tumor cells. It is an ideal target for therapeutic tumor vaccines. Although synthetic long peptide (SLP)-based neoantigen vaccine, DNA-based neoantigen vaccine, and mRNA-based neoantigen vaccine are all in the development stage, they have some inherent shortcomings. Therefore, researchers turned their attention to a new type of "non-coding RNA (ncRNA)", circular RNA (circRNA), for potential better choice. Because of its unique high stability and protein-coding capacity, circRNA is a promising target in the field of neoantigen vaccine. In this paper, we reviewed the feasibility of circRNA encoding neoantigens, summarized the construction process, explained the mechanism of circRNA vaccine in vitro, and discussed the advantages and disadvantages of circRNA vaccine and possible combination with other immunotherapies.
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Affiliation(s)
- Mohan Li
- NHC Key Laboratory of Carcinogenesis and Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan, 410013, China; Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, Hunan, 410078, China; Department of Pathology, Xiangya Hospital, Central South University, Changsha, Hunan, 410078, China
| | - Yian Wang
- Key Laboratory of Translational Cancer Stem Cell Research, Department of Pathophysiology, Hunan Normal University School of Medicine, Changsha, Hunan, China
| | - Pan Wu
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, Hunan, 410078, China
| | - Shanshan Zhang
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, Hunan, 410078, China
| | - Zhaojian Gong
- Department of Oral and Maxillofacial Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, China
| | - Qianjin Liao
- NHC Key Laboratory of Carcinogenesis and Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan, 410013, China
| | - Can Guo
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, Hunan, 410078, China
| | - Fuyan Wang
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, Hunan, 410078, China
| | - Yong Li
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, Hunan, 410078, China
| | - Zhaoyang Zeng
- NHC Key Laboratory of Carcinogenesis and Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan, 410013, China; Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, Hunan, 410078, China
| | - Qijia Yan
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, Hunan, 410078, China.
| | - Wei Xiong
- NHC Key Laboratory of Carcinogenesis and Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan, 410013, China; Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, Hunan, 410078, China.
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Sheng H, Wang X. Knockdown of circ-PIP5K1A overcomes resistance to cisplatin in ovarian cancer by miR-942-5p/NFIB axis. Anticancer Drugs 2023; 34:214-226. [PMID: 36730637 DOI: 10.1097/cad.0000000000001406] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Cisplatin (DDP)-based chemotherapy is the main chemotherapeutic agent for ovarian cancer (OC) treatment. Circular RNA PIP5K1A (circ-PIP5K1A) was found to promote OC tumorigenesis. However, whether circ-PIP5K1A was involved in DDP resistance in OC remains unclear. Levels of circ-PIP5K1A, microRNA (miR)-942-5p, and nuclear factor I B (NFIB) were detected using quantitative real-time PCR and Western blot assays. In-vitro experiments were conducted by using cell counting kit-8, cell colony formation, 5-ethynyl-2'-deoxyuridine, flow cytometry, and transwell assays, respectively. In-vivo assay was performed using murine xenograft model. The binding interaction between miR-942-5p and circ-PIP5K1A or NFIB was confirmed using dual-luciferase reporter assay. Exosomes were obtained from culture media by the use of commercial kits and qualified by transmission electron microscopy and Western blot. Circ-PIP5K1A was highly expressed in DDP-resistant OC tissues and cells. Circ-PIP5K1A knockdown could constrain the proliferation, migration, and invasion, as well as increase apoptosis and sensitivity to DDP in DDP-resistant OC cells. Mechanistically, circ-PIP5K1A acted as a sponge for miR-942-5p to positively regulate NFIB expression. Moreover, rescue experiments demonstrated that the anticancer and DDP sensitization effects caused by circ-PIP5K1A silencing in DDP-resistant OC cells were achieved through the miR-942-5p/NFIB axis. Importantly, circ-PIP5K1A silencing enhanced DDP efficacy and impeded tumor growth in OC in vivo . Additionally, we also found that circ-PIP5K1A was packaged into exosomes and could be internalized by surrounding cells. Circ-PIP5K1A knockdown reduced the resistance to DDP in OC via regulating miR-942-5p/NFIB axis. Besides that, circ-PIP5K1A was packaged into exosomes and exosomal circ-SKA3 could mediate intercellular communication between OC cells. These findings provided a promising therapeutic target for OC.
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Affiliation(s)
- Hui Sheng
- Department of Radiology, Yantai Shan Hospital, Yantai, China
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Liu R, Han X, Gao S, Chen Y, Zhang J. Hsa_circ_0001944 enhanced GSPT1 expression via sponging miR-498 to promote proliferation and invasion of gastric cancer. J Clin Lab Anal 2023; 37:e24810. [PMID: 36597856 PMCID: PMC9937881 DOI: 10.1002/jcla.24810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 11/21/2022] [Accepted: 12/03/2022] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Gastric cancer (GC) is the fifth most common malignant tumor and the third leading cause of cancer-related deaths worldwide. CircRNAs may provide new insights into the development of GC by acting as oncogenes or tumor suppressors. In this study, we aim to examine the biological role of hsa_circ_0001944 (circFIRRE) in tumor progression of GC. METHODS The bioinformatic analysis, qPCR, Western blotting, and immunohistochemistry were fulfilled to detect the expression of hsa_circ_0001944, miR-498, and GSPT1 in gastric cancer. Gain or loss of function approaches were used to investigate the biological functions of hsa_circ_0001944. MTS, EDU, wound healing, and transwell assays were performed to study the proliferation, invasion, and migration of GC cells. These molecular mechanisms were detected by luciferase reporter assays and chromatin immunoprecipitation assays. RESULTS We screened out hsa_circ_0001944, whose expression was significantly increased in gastric cancer tissues. Knockdown of hsa_circ_0001944 significantly suppressed the cell proliferation, invasion, and migration. Mechanistic investigations showed that hsa_circ_0001944 can bind to and sponge miR-498. Moreover, hsa_circ_0001944 sponged miR-498 to increase GSPT1 expression, thereby promoted excessive proliferation and maintained the malignant phenotype of GC cells. CONCLUSION The present study demonstrates the hsa_circ_0001944/miR-498/GSPT1 axis contributes to GC development. This may provide a target for GC therapy and potential prognostic biomarker.
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Affiliation(s)
- Rujiao Liu
- Phase I Clinical Trial CenterFudan University Shanghai Cancer CenterShanghaiChina,Department of OncologyShanghai Medical College, Fudan UniversityShanghaiChina
| | - Xiaotian Han
- Department of OncologyShanghai Medical College, Fudan UniversityShanghaiChina,Department of Gynecologic OncologyFudan University Shanghai Cancer CenterShanghaiChina
| | - Shuiping Gao
- Phase I Clinical Trial CenterFudan University Shanghai Cancer CenterShanghaiChina,Department of OncologyShanghai Medical College, Fudan UniversityShanghaiChina
| | - Yang Chen
- Phase I Clinical Trial CenterFudan University Shanghai Cancer CenterShanghaiChina,Department of OncologyShanghai Medical College, Fudan UniversityShanghaiChina
| | - Jian Zhang
- Phase I Clinical Trial CenterFudan University Shanghai Cancer CenterShanghaiChina,Department of OncologyShanghai Medical College, Fudan UniversityShanghaiChina
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Xu CY, Zeng XX, Xu LF, Liu M, Zhang F. Circular RNAs as diagnostic biomarkers for gastric cancer: A comprehensive update from emerging functions to clinical significances. Front Genet 2022; 13:1037120. [PMID: 36386850 PMCID: PMC9650219 DOI: 10.3389/fgene.2022.1037120] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 10/10/2022] [Indexed: 08/30/2023] Open
Abstract
The incidence and mortality of gastric cancer ranks as a fouth leading cause of cancer death worldwide, especially in East Asia. Due to the lack of specific early-stage symptoms, the majority of patients in most developing nations are diagnosed at an advanced stage. Therefore, it is urgent to find more sensitive and reliable biomarkers for gastric cancer screening and diagnosis. Circular RNAs (circRNAs), a novel type of RNAs with covalently closed loops, are becoming a latest hot spot in the field of. In recent years, a great deal of research has demonstrated that abnormal expression of circRNAs was associated with the development of gastric cancer, and suggested that circRNA might serve as a potential biomarker for gastric cancer diagnosis. In this review, we summarize the structural characteristics, formation mechanism and biological function of circRNAs, and elucidate research progress and existing problems in early screening of gastric cancer.
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Affiliation(s)
- Chun-Yi Xu
- Zhejiang Chinese Medical University, Hangzhou, China
- Core Facility, Quzhou People’s Hospital, The Quzhou Affiliated Hospital of Wenzhou Medical University, Quzhou, China
| | - Xi-Xi Zeng
- Core Facility, Quzhou People’s Hospital, The Quzhou Affiliated Hospital of Wenzhou Medical University, Quzhou, China
- Yangtze Delta Region Institute (Quzhou), University of Electronic Science and Technology of China, Quzhou, China
| | - Li-Feng Xu
- Core Facility, Quzhou People’s Hospital, The Quzhou Affiliated Hospital of Wenzhou Medical University, Quzhou, China
- Yangtze Delta Region Institute (Quzhou), University of Electronic Science and Technology of China, Quzhou, China
| | - Ming Liu
- Yangtze Delta Region Institute (Quzhou), University of Electronic Science and Technology of China, Quzhou, China
- The Joint Innovation Center for Engineering in Medicine, Quzhou, China
- University of Electronic Science and Technology of China, Chengdu, China
| | - Feng Zhang
- Core Facility, Quzhou People’s Hospital, The Quzhou Affiliated Hospital of Wenzhou Medical University, Quzhou, China
- Yangtze Delta Region Institute (Quzhou), University of Electronic Science and Technology of China, Quzhou, China
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Zhang L, Zhang P, Liu T, Li D, Liu X. Circ_0006404 enhances hepatocellular carcinoma progression by regulating miR-624. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:69980-69987. [PMID: 35579835 DOI: 10.1007/s11356-021-17574-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Accepted: 11/12/2021] [Indexed: 06/15/2023]
Abstract
Growing studies have demonstrated that circRNAs (circular RNAs) act potential roles in tumor metastasis and progression. However, the expression and function of circ_0006404 in hepatocellular carcinoma (HCC) remain to be investigated. The expression of circ_0006404 and miR-624 was detected by qRT-PCR. CCK-8 assay, flow cytometry, and wound healing were performed to determine cell proliferation, cycle, and migration. The target of circ_0006404 was studied by bioinformatics and luciferase activity analysis. Our data indicated that circ_0006404 was overexpressed in HCC specimens and cells and ectopic expression of circ_0006404 increased HCC cell growth, cycle, and migration. Moreover, we showed that miR-624 was downregulated in HCC specimens and cells and miR-624 expression was negatively correlated with circ_0006404 expression in HCC specimens. Circ_0006404 sponged miR-624 in HCC cell, and the overexpression of circ_0006404 suppressed miR-624 expression in HCC cell. Furthermore, circ_0006404 induced HCC cell growth, cycle, and migration via regulating miR-624. These results elucidated that circ_0006404 facilitated HCC progression and might act as one new biomarker for this carcinoma.
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Affiliation(s)
- Liguo Zhang
- Department of Infectious Diseases, Binzhou Medical University Hospital, Binzhou, 256603, Shandong, China
| | - Ping Zhang
- Department One of Oncology, Binzhou People's Hospital, Binzhou, Shandong, China
| | - Tonggang Liu
- Department of Infectious Diseases, Binzhou Medical University Hospital, Binzhou, 256603, Shandong, China.
| | - Dongmei Li
- Department of Infectious Diseases, Binzhou Medical University Hospital, Binzhou, 256603, Shandong, China
| | - Xianxian Liu
- Department of Infectious Diseases, Binzhou Medical University Hospital, Binzhou, 256603, Shandong, China.
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Matuszyk J. MALAT1-miRNAs network regulate thymidylate synthase and affect 5FU-based chemotherapy. Mol Med 2022; 28:89. [PMID: 35922756 PMCID: PMC9351108 DOI: 10.1186/s10020-022-00516-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 07/22/2022] [Indexed: 12/12/2022] Open
Abstract
Background The active metabolite of 5-Fluorouracil (5FU), used in the treatment of several types of cancer, acts by inhibiting the thymidylate synthase encoded by the TYMS gene, which catalyzes the rate-limiting step in DNA replication. The major failure of 5FU-based cancer therapy is the development of drug resistance. High levels of TYMS-encoded protein in cancerous tissues are predictive of poor response to 5FU treatment. Expression of TYMS is regulated by various mechanisms, including involving non-coding RNAs, both miRNAs and long non-coding RNAs (lncRNAs). Aim To delineate the miRNAs and lncRNAs network regulating the level of TYMS-encoded protein. Main body Several miRNAs targeting TYMS mRNA have been identified in colon cancers, the levels of which can be regulated to varying degrees by lncRNAs. Due to their regulation by the MALAT1 lncRNA, these miRNAs can be divided into three groups: (1) miR-197-3p, miR-203a-3p, miR-375-3p which are downregulated by MALAT1 as confirmed experimentally and the levels of these miRNAs are actually reduced in colon and gastric cancers; (2) miR-140-3p, miR-330-3p that could potentially interact with MALAT1, but not yet supported by experimental results; (3) miR-192-5p, miR-215-5p whose seed sequences do not recognize complementary response elements within MALAT1. Considering the putative MALAT1-miRNAs interaction network, attention is drawn to the potential positive feedback loop causing increased expression of MALAT1 in colon cancer and hepatocellular carcinoma, where YAP1 acts as a transcriptional co-factor which, by binding to the TCF4 transcription factor/ β-catenin complex, may increase the activation of the MALAT1 gene whereas the MALAT1 lncRNA can inhibit miR-375-3p which in turn targets YAP1 mRNA. Conclusion The network of non-coding RNAs may reduce the sensitivity of cancer cells to 5FU treatment by upregulating the level of thymidylate synthase.
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Affiliation(s)
- Janusz Matuszyk
- Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 12 R. Weigla Street, 53-114, Wroclaw, Poland.
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11
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Tang M, Wang F, Wang K, Jiang Y, Wang Q. Circ_0058063 promotes progression of thyroid cancer by sponging miR-330-3p/SDC4 axis. Anticancer Drugs 2022; 33:642-651. [PMID: 35324533 DOI: 10.1097/cad.0000000000001307] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Circular RNA takes a crucial part in carcinogenesis. Circ_0058063 has been found to act as an oncogene in esophageal cancer and bladder cancer, but its role in thyroid cancer (TC) is still under investigation. Therefore, we carried out a study to understand its role in TC and its association with miR-330-3p. The circ_0058063 and miR-330-3p in TC tissues and cells were quantified by quantitative reverse transcription PCR, and cell counting kit-8 and scratch adhesion test were conducted for evaluation of cell proliferation and migration. In addition, a dual luciferase reporter assay and RNA immunoprecipitation assay were conducted for interaction analysis between circ_0058063 and miR-330-3p. Circ_0058063 was upregulated in TC tissues and cells, but miR-330-3p expression showed an opposite trend. Both silencing circ_0058063 and upregulating miR-330-3p can suppress the proliferation and migration of TC cells, upregulate Bax, and downregulate Bcl-2. In addition, circ_0058063 is able to target miR-330-3p that is also able to target syndecan 4 (SDC4). circ_0058063 can act as a carcinogen in cases with TC via the miR-330-3p/SDC4 axis.
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Affiliation(s)
| | - Fengbo Wang
- Rehabilitation Medicine, Clinical Medical College of Chengdu Medical College, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Ke Wang
- Rehabilitation Medicine, Clinical Medical College of Chengdu Medical College, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Yuan Jiang
- Rehabilitation Medicine, Clinical Medical College of Chengdu Medical College, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Qiongfen Wang
- Rehabilitation Medicine, Clinical Medical College of Chengdu Medical College, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
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12
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Zhang P, Wang W, Li M. Role and mechanism of circular RNA circ_0050486 in regulating oxidized low-density lipoprotein-induced injury in endothelial cells. Clin Hemorheol Microcirc 2022; 82:107-124. [PMID: 35723090 DOI: 10.3233/ch-211259] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Dysfunction of endothelial cells in the arterial vasculature is an essential contributor to the pathogenesis of atherosclerosis. Circular RNAs (circRNAs) exert important regulatory functions in endothelial cell dysfunction. Here, we explored the precise role and mechanism of circ_0050486 in regulating endothelial cell injury induced by oxidized low-density lipoprotein (ox-LDL). METHODS Circ_0050486, microRNA (miR)-182-5p and myeloid differentiation primary response gene 88 (MyD88) were quantified by quantitative real-time PCR or western blot. Cell viability, proliferation and apoptosis were examined by MTS, 5-Ethynyl-2'-Deoxyuridine (EdU), and flow cytometry assays, respectively. Direct relationship between miR-182-5p and circ_0050486 or MYD88 was verified by dual-luciferase reporter and RNA immunoprecipitation (RIP) assays. RESULTS Circ_0050486 was upregulated in atherosclerosis serum and ox-LDL-treated human aortic endothelial cells (HAECs). Silencing of circ_0050486 suppressed HAEC injury induced by ox-LDL. Mechanistically, circ_0050486 targeted miR-182-5p, and the effects of circ_0050486 silencing were partially due to the upregulation of miR-182-5p. MYD88 was a direct target of miR-182-5p, and miR-182-5p-mediated inhibition of MYD88 attenuated ox-LDL-evoked HAEC injury. Circ_0050486 bound to miR-182-5p to regulate MYD88 expression. Additionally, the NF-κB signaling pathway was involved in the regulation of circ_0050486/miR-182-5p/MYD88 axis in ox-LDL-treated HAECs. CONCLUSION Our study identifies the functional role of circ_0050486 in ox-LDL-induced endogenous cell injury and establishes a mechanism of circ_0050486 function by affecting MYD88 through competitively binding to shared miR-182-5p.
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Affiliation(s)
- Pu Zhang
- Second Department of Cardiology, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan, China
| | - Weiping Wang
- Second Department of Cardiology, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan, China
| | - Meilan Li
- Second Department of Cardiology, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan, China
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13
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Yang G, Zhang Y, Lin H, Liu J, Huang S, Zhong W, Peng C, Du L. CircRNA circ_0023984 promotes the progression of esophageal squamous cell carcinoma via regulating miR-134-5p/cystatin-s axis. Bioengineered 2022; 13:10578-10593. [PMID: 35440286 PMCID: PMC9161969 DOI: 10.1080/21655979.2022.2063562] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Recent studies have shown that circRNAs can act as oncogenic factors or tumor suppressors by sponging microRNAs (miRNAs). The upregulation of circ_0023984 was reported in esophageal squamous cell carcinoma (ESCC). However, its functional role in ESCC remain unclear. In the present study, circ_0023984 expression in ESCC cells and tissues were analyzed by quantitative real-time polymerase chain reaction (qRT-PCR) and Western blotting (WB). Subcellular fraction experiment was performed to determine relative nuclear-cytoplasmic localization. The loss-of-function effects of circ_0023984 in ESCC cell lines were investigated by shRNA-mediated knockdown. Functional assays including cell Counting Kit-8 (CCK-8), 5-Ethynyl-2’-deoxyuridine (EDU) incorporation, colony formation and Transwell migration assays were conducted to assess the malignant phenotype. The interaction between the two molecules was analyzed by RNA pull-down, luciferase reporter assay and RNA immunoprecipitation (RIP). The subcutaneous tumor model in nude mice was used to assess the role of circ-0023984 in tumorigenesis. We found that ESCC patients with high circ_0023984 expression was associated with a poor prognosis. The knockdown of circ_0023984 suppressed cell growth, invasion, and migration in ESCC cells. Circ_0023984 interacted with miR-134-5p and inhibited its activity, which promoted the expression of CST4 (Cystatin-S). Circ_0023984 also regulated tumorigenesis in a CST4-dependent manner. Together, our study indicates that the oncogenic role of Circ_0023984 is mediated by miR-134-5p/CST4 Axis in ESCC, which could serve as potential targets for future therapeutic strategies.
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Affiliation(s)
- Ge Yang
- Department of Clinical Laboratory, Affiliated Neijiang Second People's Hospital of Southwest Medical University, Neijiang, P.R, China.,Department of Clinical Laboratory, The First Affiliated Hospital of Southwest Medical University, China Neijiang
| | - Yu Zhang
- Department of Clinical Laboratory, The First Affiliated Hospital of Southwest Medical University, China Neijiang
| | - Hongni Lin
- Scientific research department, Sichuan Neijiang Health Vocational College, China Neijiang
| | - Jinnbo Liu
- Department of Clinical Laboratory, The First Affiliated Hospital of Southwest Medical University, China Neijiang
| | - Shengjie Huang
- Scientific research department, Sichuan Neijiang Health Vocational College, China Neijiang
| | - Wei Zhong
- Nuclear medicine department, Affiliated Neijiang Second People's Hospital of Southwest Medical University, Neijiang, P.R, China
| | - Chao Peng
- Department of intestine surgery, Affiliated Neijiang Second People's Hospital of Southwest Medical University, Neijiang, P.R, China
| | - Lin Du
- Scientific research department, Sichuan Neijiang Health Vocational College, China Neijiang
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14
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Zhang L, Ye L, Xu Z, Jin Y, Song D. Circ-CREBBP promotes cell tumorigenesis and glutamine catabolism in glioma by regulating miR-375/glutaminase axis. Brain Res 2022; 1775:147730. [PMID: 34813772 DOI: 10.1016/j.brainres.2021.147730] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 11/04/2021] [Accepted: 11/17/2021] [Indexed: 12/30/2022]
Abstract
Circular RNA CREB-binding protein (circ-CREBBP) has been reported to involve in the tumorigenesis of glioma. However, the role and underlying molecular mechanism of circ-CREBBP in glioma glutamine catabolism remain unclear. The expression of circ-CREBBP, microRNA (miR)-375 and glutaminase (GLS) was detected using quantitative real-time polymerase chain reaction and western blot. The 3‑(4, 5‑dimethylthiazol‑2‑y1)‑2, 5‑diphenyl tetrazolium bromide (MTT), colony formation, flow cytometry and transwell assays were used to determine the effects of them on glioma cell malignant biological behaviors in vitro. Glutamine metabolism was analyzed using assay kits. Murine xenograft model was established to investigate the role of circ-CREBBP in vivo. The binding interactions between miR-375 and circ-CREBBP or GLS were confirmed by the dual-luciferase reporter assay. Circ-CREBBP was highly expressed in glioma tissues and cells, and high expression of circ-CREBBP predicted poor prognosis. Circ-CREBBP knockdown suppressed cell proliferation, migration, invasion and glutamine metabolism while expedited cell apoptosis in glioma in vitro, as well as impeded tumor growth in vivo. Circ-CREBBP directly targeted miR-375, which was demonstrated to restrain glioma cell growth, motility and glutamine metabolism. Moreover, miR-375 inhibition reverted the anticancer effects of circ-CREBBP knockdown on glioma cells. GLS was a target of miR-375, GLS silencing or the treatment of GLS inhibitor bis-2-(5-phenylacetamido-1,3,4-thiadiazol-2-yl)ethyl sulfide (BPTES) impaired glioma cell malignant phenotypes and glutamine metabolism. Importantly, GLS up-regulation weakened the tumor-suppressive functions of miR-375 on glioma cells. Mechanistically, circ-CREBBP indirectly regulated GLS expression through sponging miR-375. In all, circ-CREBBP expedited glioma tumorigenesis and glutamine metabolism through miR-375/GLS axis, suggesting a promising target for combined glioma therapy.
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Affiliation(s)
- Lintao Zhang
- Department of Neurosurgery, Jiaozhou People's Hospital, China
| | - Lin Ye
- Department of Neurosurgery, Jiaozhou People's Hospital, China
| | - Zengliang Xu
- Department of Neurosurgery, Jiaozhou People's Hospital, China
| | - Yanfei Jin
- Department of Neurosurgery, Jiaozhou People's Hospital, China
| | - Dewen Song
- Department of Neurosurgery, Jiaozhou People's Hospital, China.
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15
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He Y, Zhang Z, Wang Z, Jiao Y, Kang Q, Li J. Downregulation of circ-SFMBT2 blocks the development of gastric cancer by targeting the miR-885-3p/CHD7 pathway. Anticancer Drugs 2022; 33:e247-e259. [PMID: 34387601 DOI: 10.1097/cad.0000000000001195] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Accumulating evidence insists that circular RNAs (circRNAs) play important roles in the development of human cancers, including gastric cancer. This study aimed to investigate the role of circ-SFMBT2 and provide a potential mechanism to explain its function. The expression of circ-SFMBT2, miR-885-3p and chromodomain-helicase-DNA-binding protein 7 (CHD7) mRNA was determined by quantitative real-time PCR (qRT-PCR), and the protein level of CHD7 was determined by western blot. To investigate the function of circ-SFMBT2 in vitro, the effects of circ-SFMBT2 on cell viability, colony formation, apoptosis, migration and invasion were assessed using cell counting kit-8 assay, colony formation assay, flow cytometry assay, wounding healing assay and transwell assay, respectively. The indicators of oxidative stress were assessed using matched kits. Besides, the function of circ-SFMBT2 was also investigated in animal models. The relationship between miR-885-3p and circ-SFMBT2 or CHD7 was verified by dual-luciferase reporter assay and RNA immunoprecipitation assay. Circ-SFMBT2 and CHD7 were upregulated, whereas miR-885-3p was downregulated in gastric cancer tissues and cells. In functional assay, circ-SFMBT2 knockdown suppressed gastric cancer cell viability, colony formation ability, migration, invasion and oxidative stress but induced apoptosis, and circ-SFMBT2 downregulation also blocked tumor growth in vivo. In mechanism analysis, circ-SFMBT2 regulated CHD7 expression by sponging its target miRNA, miR-885-3p. Rescue experiments manifested that miR-885-3p inhibition reversed the effects of circ-SFMBT2 knockdown, and CHD7 overexpression abolished the antitumor role of miR-885-3p overexpression. Moreover, circ-SFMBT2 knockdown inactivated the Wnt/β-catenin signaling pathway. Circ-SFMBT2 downregulation repressed the development of gastric cancer partially by controlling the miR-885-3p/CHD7 axis, which might be a novel strategy to inhibit gastric cancer progression.
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Affiliation(s)
- Yuqi He
- Department of Oncology, The First People's Hospital of Lanzhou City, Lanzhou City, Gansu Province, China
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16
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Sheng H, Pan H, Yao M, Xu L, Lu J, Liu B, Shen J, Shen H. Integrated Analysis of Circular RNA-Associated ceRNA Network Reveals Potential circRNA Biomarkers in Human Breast Cancer. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2021; 2021:1732176. [PMID: 34966440 PMCID: PMC8712159 DOI: 10.1155/2021/1732176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 11/25/2021] [Indexed: 12/13/2022]
Abstract
Circular RNA (circRNA) is closely related to tumorigenesis and cancer progression. Yet, the roles of cancer-specific circRNAs in the circRNA-related ceRNA network of breast cancer (BRCA) remain unclear. The aim of this study was to construct a ceRNA network associated with circRNA and to explore new therapeutic and prognostic targets and biomarkers for breast cancer. We downloaded the circRNA expression profile of BRCA from Gene Expression Omnibus (GEO) microarray datasets and downloaded the miRNA and mRNA expression profiles of BRCA from The Cancer Genome Atlas (TCGA) database. Differentially expressed mRNAs (DEmRNAs), differentially expressed miRNAs (DEmiRNAs), and differentially expressed circRNAs (DEcircRNAs) were identified, and a competitive endogenous RNA (ceRNA) regulatory network was constructed based on circRNA-miRNA pairs and miRNA-mRNA pairs. Gene ontology and pathway enrichment analyses were performed on mRNAs regulated by circRNAs in ceRNA networks. Survival analysis and correlation analysis of all mRNAs and miRNAs in the ceRNA network were performed. A total of 72 DEcircRNAs, 158 DEmiRNAs, and 2762 DE mRNAs were identified. The constructed ceRNA network contains 60 circRNA-miRNA pairs and 140 miRNA-mRNA pairs, including 40 circRNAs, 30 miRNAs, and 100 mRNAs. Functional enrichment indicated that DEmRNAs regulated by DEcircRNAs in ceRNA networks were significantly enriched in the PI3K-Akt signaling pathway, microRNAs in cancer, and proteoglycans in cancer. Survival analysis and correlation analysis of all mRNAs and miRNAs in the ceRNA network showed that 13 mRNAs and 6 miRNAs were significantly associated with overall survival, and 48 miRNA-mRNA interaction pairs had a significant negative correlation. A PPI network was established, and 21 hub genes were determined from the network. This study provides an effective bioinformatics basis for further understanding of the molecular mechanisms and predictions of breast cancer. A better understanding of the circRNA-related ceRNA network in BRCA will help identify potential biomarkers for diagnosis and prognosis.
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Affiliation(s)
- Han Sheng
- Department of Nursing, The First Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Huan Pan
- Department of Central Laboratory, The First Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Ming Yao
- Department of Anesthesiology and Pain Medicine, The First Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Longsheng Xu
- Department of Central Laboratory, The First Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Jianju Lu
- Department of Breast Disease, The First Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Beibei Liu
- Department of Central Laboratory, The First Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Jianfen Shen
- Department of Central Laboratory, The First Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
| | - Hui Shen
- Department of Central Laboratory, The First Affiliated Hospital of Jiaxing University, Jiaxing 314000, China
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17
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Yang YR, Hu S, Bu FT, Li H, Huang C, Meng XM, Zhang L, Lv XW, Li J. Circular RNA CREBBP Suppresses Hepatic Fibrosis Via Targeting the hsa-miR-1291/LEFTY2 Axis. Front Pharmacol 2021; 12:741151. [PMID: 34887753 PMCID: PMC8648568 DOI: 10.3389/fphar.2021.741151] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 09/01/2021] [Indexed: 11/30/2022] Open
Abstract
CircRNAs (circRNAs) are commonly dysregulated in a variety of human diseases and are involved in the development and progression of cancer. However, the role of circRNAs in hepatic fibrosis (HF) is still unclear. Our previous high throughput screen revealed changes in many circRNAs in mice with carbon tetrachloride (CCl4)-induced HF. For example, circCREBBP was significantly down-regulated in primary hepatic stellate cells (HSCs) and liver tissue of HF mice induced by CCl4 compared to those in the vehicle group. Overexpression of circCREBBP with AAV8-circCREBBP in vivo prevented CCl4-induced HF worsening by reducing serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) contents, liver hydroxyproline levels, collagen deposition, and levels of pro-fibrosis genes and pro-inflammatory cytokines. Furthermore, in vitro function loss and function gain analysis showed that circCREBBP inhibited HSCs activation and proliferation. Mechanically, circCREBBP acts as a sponge for hsa-miR-1291 and subsequently promotes LEFTY2 expression. In conclusion, our current results reveal a novel mechanism by which circCREBBP alleviates liver fibrosis by targeting the hsa-miR-1291/LEFTY2 axis, and also suggest that circCREBBP may be a potential biomarker for heart failure.
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Affiliation(s)
- Ya-Ru Yang
- Department of Clinical Pharmacology, Second Hospital of Anhui Medical University, Hefei, China
| | - Shuang Hu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Fang-Tian Bu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Hao Li
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Cheng Huang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Xiao-Ming Meng
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Lei Zhang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Xiong-Wen Lv
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
| | - Jun Li
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Anhui Medical University, Hefei, China
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18
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Song XH, He N, Xing YT, Jin XQ, Li YW, Liu SS, Gao ZY, Guo C, Wang JJ, Huang YY, Hu H, Wang LL. A Novel Age-Related Circular RNA Circ-ATXN2 Inhibits Proliferation, Promotes Cell Death and Adipogenesis in Rat Adipose Tissue-Derived Stromal Cells. Front Genet 2021; 12:761926. [PMID: 34858478 PMCID: PMC8630790 DOI: 10.3389/fgene.2021.761926] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 10/26/2021] [Indexed: 12/13/2022] Open
Abstract
Adipose tissue-derived stromal cells are promising candidates investigating the stem cell-related treatment. However, their proportion and utility in the human body decline with time, rendering stem cells incompetent to complete repair processes in vivo. The involvement of circRNAs in the aging process is poorly understood. Rat subcutaneous adipose tissue from 10-week-old and 27-month-old rats were used for hematoxylin and eosin (H and E) staining, TUNEL staining, and circRNA sequencing. Rat adipose tissue-derived stromal cells were cultured and overexpressed with circ-ATXN2. Proliferation was examined using xCELLigence real-time cell analysis, EdU staining, and cell cycle assay. Apoptosis was induced by CoCl2 and examined using flow cytometry. RT-PCR assay and Oil Red O staining were used to measure adipogenesis at 48 h and 14 days, respectively. H and E staining showed that the diameter of adipocytes increased; however, the number of cells decreased in old rats. TUNEL staining showed that the proportion of apoptotic cells was increased in old rats. A total of 4,860 and 4,952 circRNAs was detected in young and old rats, respectively. Among them, 67 circRNAs exhibited divergent expression between the two groups (fold change ≥2, p ≤ 0.05), of which 33 were upregulated (49.3%) and 34 were downregulated (50.7%). The proliferation of circ-ATXN2-overexpressing cells decreased significantly in vitro, which was further validated by xCELLigence real-time cell analysis, EdU staining, and cell cycle assay. Overexpression of circ-ATXN2 significantly increased the total apoptotic rate from 5.78 ± 0.46% to 11.97 ± 1.61%, early apoptotic rate from 1.76 ± 0.22% to 5.50 ± 0.66%, and late apoptosis rate from 4.02 ± 0.25% to 6.47 ± 1.06% in adipose tissue-derived stromal cells. Furthermore, in circ-ATXN2-overexpressing cells, RT-PCR assay revealed that the expression levels of adipose differentiation-related genes PPARγ and CEBP/α were increased and the Oil Red O staining assay showed more lipid droplets. Our study revealed the expression profile of circRNAs in the adipose tissue of old rats. We found a novel age-related circular RNA—circ-ATXN2—that inhibits proliferation and promotes cell death and adipogenesis in rat adipose tissue-derived stromal cells.
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Affiliation(s)
- Xing-Hui Song
- Core Facilities, Zhejiang University School of Medicine, Hangzhou, China
| | - Ning He
- Department of Basic Medicine Sciences and Department of Orthopaedics of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yue-Ting Xing
- Core Facilities, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiao-Qin Jin
- China Medical Research Center, Zhejiang Chinese Medical University Academy of Chinese Medical Sciences, Hangzhou, China
| | - Yan-Wei Li
- Core Facilities, Zhejiang University School of Medicine, Hangzhou, China
| | - Shuang-Shuang Liu
- Core Facilities, Zhejiang University School of Medicine, Hangzhou, China
| | - Zi-Ying Gao
- School of Medicine, Zhejiang University City College, Hangzhou, China
| | - Chun Guo
- Core Facilities, Zhejiang University School of Medicine, Hangzhou, China
| | - Jia-Jia Wang
- Core Facilities, Zhejiang University School of Medicine, Hangzhou, China
| | - Ying-Ying Huang
- Core Facilities, Zhejiang University School of Medicine, Hangzhou, China
| | - Hu Hu
- Department of Pathology and Pathophysiology, Zhejiang University School of Medicine, Hangzhou, China
| | - Lin-Lin Wang
- Department of Basic Medicine Sciences and Department of Orthopaedics of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
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19
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Liu W, Hu W, Hou K, Zhu S. Circular RNA Paired-Related Homeobox 1 Promotes Gastric Carcinoma Cell Progression via Regulating MicroRNA-665/YWHAZ Axis. Dig Dis Sci 2021; 66:3842-3853. [PMID: 33201331 DOI: 10.1007/s10620-020-06705-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 10/30/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Gastric carcinoma (GC) is a ubiquitous malignant tumor worldwide. Circular RNA paired-related homeobox 1 (circ-PRRX1), one kind of non-coding RNAs, has been reported to act as a promoter in tumor growth. This study aims to explore the effects of circ-PRRX1 on proliferation, apoptosis, and metastasis in GC and the underlying regulatory mechanisms. METHODS The expression of circ-PRRX1, miR-665, and tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein zeta (YWHAZ) mRNA was analyzed by quantitative real-time polymerase chain reaction (qRT-PCR). Western blot was used to analyze YWHAZ protein expression. 3-(4, 5-dimethyl-2-thiazolyl)-2, 5-diphenyl-2-Htetrazolium bromide (MTT), flow cytometry, and transwell assay were carried out to assess the viability, apoptosis, migration, and invasion in GC cells. The interaction between miR-665 and circ-PRRX1 or YWHAZ was predicted by StarBase v2.0 and identified by dual-luciferase reporter system. Xenograft mouse model was employed to determine the effects of circ-PRRX1 knockdown on GC growth in vivo. RESULTS Compared with normal tissues and cells, circ-PRRX1 and YWHAZ levels were upregulated, and miR-665 was downregulated in GC tissues and cells. Functionally, circ-PRRX1 knockdown inhibited the viability, migration, and invasion and promoted apoptosis in GC cells, whereas anti-miR-665 abolished these effects. Mechanistically, circ-PRRX1 was confirmed as a sponge of miR-665 to regulate YWHAZ expression. Xenograft mouse model suggested that circ-PRRX1 knockdown reduced GC cells growth in vivo. CONCLUSION Circ-PRRX1 knockdown suppressed GC development by targeting miR-665 to inhibit YWHAZ expression, and the potential molecular mechanism may provide a theoretical basis for GC therapy.
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Affiliation(s)
- Wei Liu
- Department of General Surgery, Shidong Hospital, No. 999, Shiguang Road, Shanghai, 200438, China
| | - Weigao Hu
- Department of General Surgery, Shidong Hospital, No. 999, Shiguang Road, Shanghai, 200438, China
| | - Kezhu Hou
- Department of General Surgery, Shidong Hospital, No. 999, Shiguang Road, Shanghai, 200438, China
| | - Song Zhu
- Department of General Surgery, Shidong Hospital, No. 999, Shiguang Road, Shanghai, 200438, China.
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20
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Lu Y, Li K, Gao Y, Liang W, Wang X, Chen L. CircRNAs in gastric cancer: current research and potential clinical implications. FEBS Lett 2021; 595:2644-2654. [PMID: 34561854 DOI: 10.1002/1873-3468.14196] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 09/04/2021] [Accepted: 09/14/2021] [Indexed: 12/11/2022]
Abstract
Gastric cancer (GC) has a dismal prognosis and is also one of the most commonly diagnosed malignancies worldwide. circRNAs are covalently closed circular RNA molecules without 5'-cap and a 3'-tail, currently listed among the broad noncoding RNA family. circRNAs participate in a variety of pathophysiological processes relevant to human diseases, especially malignancies, including GC. Compelling evidence has shown that circRNAs can function by sponging miRNAs, interacting with RNA binding proteins, and encoding proteins or peptides. Yet, our current understanding of these RNA circles remains very limited. Here, we overview the biogenesis, characteristics, functions, and degradation of circRNAs. Moreover, we give an account of the circRNAs that have been linked with GC, describing their functions and mechanisms of action in the context of GC. Next, we discuss the potential value of circRNAs as diagnostic or prognostic GC biomarkers and summarize future prospects, important questions, and challenges of circRNA-based therapeutics.
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Affiliation(s)
- Yixun Lu
- Medical School of Chinese PLA, Beijing, China
- Department & Institute of General Surgery, the First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Kai Li
- Medical School of Chinese PLA, Beijing, China
- Department & Institute of General Surgery, the First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Yunhe Gao
- Department & Institute of General Surgery, the First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Wenquan Liang
- Department & Institute of General Surgery, the First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Xinxin Wang
- Department & Institute of General Surgery, the First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Lin Chen
- Department & Institute of General Surgery, the First Medical Center of Chinese PLA General Hospital, Beijing, China
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21
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Song M, Liu J, Zheng X, Zhou X, Feng Z, Hu W. MiR-148a-3p targets CEMIP to suppress the genesis of gastric cancer cells. Biochem Biophys Res Commun 2021; 575:42-49. [PMID: 34455220 DOI: 10.1016/j.bbrc.2021.08.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 08/13/2021] [Indexed: 12/09/2022]
Abstract
BACKGROUND Gastric cancer is the sixth common malignancy worldwide. Dysregulation of Cell Migration Inducing Hyaluronidase 1 (CEMIP) gene and microRNA-148a -3p (miR-148a-3p) expressions has been found in gastric cancer genesis. However, the underlying molecular mechanism in gastric cancer needs further investigation. METHODS The expression of gastric cancer tissues' and cells' CEMIP and miR-148a-3p were examined by RT-qPCR. The interaction between miR-148a-3p and CEMIP was verified by luciferase activity detection. Cell viability, proliferation, adhesion, and apoptosis in gastric cancer GTL-16 and AGS cells were analyzed by CCK8, BrdU, cell adhesion, and FITC assay. RESULTS CEMIP expression was significantly elevated, but the miR-148a-3p level was downregulated in gastric cancer tissues and cell lines. Overexpression of CEMIP accelerated cell viability, proliferation, and adhesion, but attenuated cell apoptosis of gastric cancer cells. In addition, upregulation of miR-148a-3p repressed the development of gastric cancer in vitro. Moreover, miR-148a-3p suppressed gastric cancer tumorigenesis by inhibiting the expression of CEMIP. CONCLUSION The study clarified that miR-148a-3p suppressed gastric cancer tumorigenesis by inhibiting CEMIP, which may be effective targets for the clinical treatment of gastric cancer.
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Affiliation(s)
- Ming Song
- Department of General Surgery, Wuhan Third Hospital, Wuhan, 430000, Hubei, China
| | - Jun Liu
- Department of General Surgery, Wuhan Third Hospital, Wuhan, 430000, Hubei, China
| | - Xin Zheng
- Department of General Surgery, Wuhan Third Hospital, Wuhan, 430000, Hubei, China
| | - Xin Zhou
- Department of General Surgery, Wuhan Third Hospital, Wuhan, 430000, Hubei, China
| | - Zehui Feng
- Department of General Surgery, Dongfeng Hospital of Hubei University of Medicine, Wuhan, 430000, Hubei, China
| | - Wei Hu
- Department of General Surgery, Wuhan Third Hospital, Wuhan, 430000, Hubei, China.
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22
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Zhou Q, Li Y, Chen L, Zheng X, Jiang T, Liu J, Fu Y, Guan L, Ju J, Wu C. Long Non-Coding RNA GRIK1-AS1 Inhibits the Proliferation and Invasion of Gastric Cancer Cells by Regulating the miR-375/IFIT2 Axis. Front Oncol 2021; 11:754834. [PMID: 34660323 PMCID: PMC8514995 DOI: 10.3389/fonc.2021.754834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Accepted: 09/10/2021] [Indexed: 11/26/2022] Open
Abstract
Long non-coding RNAs (lncRNAs) play important roles in various biological processes and human diseases, including cancer. In this study, we demonstrated a regulatory relationship between lncRNA GRIK1-AS1 and miR-375/IFIT2 axis in gastric cancer. Our results show a decreased expression of GRIK1-AS1 in gastric cancer tissues compared to adjacent normal gastric tissues. Gastric cell lines also have reduced levels of GRIK1-AS1 compared to gastric epithelial cell line GES-1. Ectopic expression of GRIK1-AS1 in gastric cancer cell lines significantly inhibits cellular viability, migration, and invasion. RNA-pull down and the luciferase activity assays show that GRIK1-AS1 mainly interacts specifically with miR-375. We further demonstrate a negatively regulatory relationship between lncRNA GRIK1-AS1 and miR-375. We discovered that IFIT2 was one of the direct key downstream target genes of miR-375, and established the important role of the GRIK1-AS1/miR-375/IFIT2 axis in the progression of gastric cancer. Taken together, our results revealed a novel mechanism of GRIK1-AS1 as a sponge to miR-375 that impacts gastric cancer progression via modulating target mRNA IFIT2 translation, and as a result, opens a new strategy to future GRIK1-AS1 based therapeutic development.
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Affiliation(s)
- Qi Zhou
- Department of Oncology, The Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Yuan Li
- Department of Tumor Biological Treatment, The Third Affiliated Hospital of Soochow University, Changzhou, China.,Jiangsu Engineering Research Center for Tumor Immunotherapy, Changzhou, China.,Institute of Cell Therapy, Soochow University, Changzhou, China
| | - Lujun Chen
- Department of Tumor Biological Treatment, The Third Affiliated Hospital of Soochow University, Changzhou, China.,Jiangsu Engineering Research Center for Tumor Immunotherapy, Changzhou, China.,Institute of Cell Therapy, Soochow University, Changzhou, China
| | - Xiao Zheng
- Department of Tumor Biological Treatment, The Third Affiliated Hospital of Soochow University, Changzhou, China.,Jiangsu Engineering Research Center for Tumor Immunotherapy, Changzhou, China.,Institute of Cell Therapy, Soochow University, Changzhou, China
| | - Tianwei Jiang
- Department of Neurosurgery, The Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Juan Liu
- Department of Tumor Biological Treatment, The Third Affiliated Hospital of Soochow University, Changzhou, China.,Jiangsu Engineering Research Center for Tumor Immunotherapy, Changzhou, China.,Institute of Cell Therapy, Soochow University, Changzhou, China
| | - Yuanyuan Fu
- Department of Tumor Biological Treatment, The Third Affiliated Hospital of Soochow University, Changzhou, China.,Jiangsu Engineering Research Center for Tumor Immunotherapy, Changzhou, China.,Institute of Cell Therapy, Soochow University, Changzhou, China
| | - Liping Guan
- Department of Tumor Biological Treatment, The Third Affiliated Hospital of Soochow University, Changzhou, China.,Jiangsu Engineering Research Center for Tumor Immunotherapy, Changzhou, China.,Institute of Cell Therapy, Soochow University, Changzhou, China
| | - Jingfang Ju
- Translational Research Laboratory, Department of Pathology, Stony Brook University, Stony Brook, NY, United States
| | - Changping Wu
- Department of Oncology, The Third Affiliated Hospital of Soochow University, Changzhou, China.,Department of Tumor Biological Treatment, The Third Affiliated Hospital of Soochow University, Changzhou, China.,Jiangsu Engineering Research Center for Tumor Immunotherapy, Changzhou, China.,Institute of Cell Therapy, Soochow University, Changzhou, China
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23
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Chen W, Ji Y. CircC6orf132 Facilitates Proliferation, Migration, Invasion, and Glycolysis of Gastric Cancer Cells Under Hypoxia by Acting on the miR-873-5p/PRKAA1 Axis. Front Genet 2021; 12:636392. [PMID: 34659329 PMCID: PMC8514671 DOI: 10.3389/fgene.2021.636392] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 08/20/2021] [Indexed: 12/19/2022] Open
Abstract
Background: Hypoxia is a crucial factor in the progression of various tumors, including gastric cancer (GC). Circular RNAs (circRNAs) are important regulators in GC, and this study focused on researching circC6orf132 in GC progression under hypoxia. Methods:In vitro experiments were performed in GC cells under hypoxia (1% O2). CircC6orf132, microRNA-873-5p (miR-873-5p), and protein kinase AMP-activated alpha 1 catalytic subunit (PRKAA1) levels were examined by real-time polymerase chain reaction (qRT-PCR). Colony formation assay and transwell assay were used for detecting cell proliferation and migration or invasion. Glycolytic metabolism was evaluated using lactate production, glucose uptake, and adenosine triphosphate (ATP) level and extracellular acidification rate (ECAR). Western blotting was performed for determining protein expression. The target interaction was analyzed by dual-luciferase reporter and RNA immunoprecipitation (RIP) assays. In vivo assay was conducted via mouse xenograft model. Results: The expression of circC6orf132 was significantly high in GC cells under hypoxia. Hypoxia-induced GC proliferation, migration, invasion, and glycolysis were reversed by silencing circC6orf132. CircC6orf132 targeted miR-873-5p; and the inhibition of circC6orf132 knockdown for the effects of hypoxia on GC cells was abrogated by miR-873-5p inhibitor. PRKAA1 was validated as a downstream gene of miR-873-5p, and miR-873-5p functioned as an anticancer molecule in GC cells under hypoxia by downregulating PRKAA1 level. CircC6orf132 could regulate PRKAA1 by sponging miR-873-5p. CircC6orf132/miR-873-5p/PRKAA1 axis could regulate GC progression under the hypoxic condition. CircC6orf132 downregulation reduced tumorigenesis in vivo through affecting the miR-873-5p/PRKAA1 axis. Conclusion: CircC6orf132 has been affirmed to promote proliferation, migration, invasion, and glycolysis in GC under hypoxia, partly by depending on the regulation of miR-873-5p/PRKAA1 axis.
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Affiliation(s)
- Weizhi Chen
- Department of Pathogenic Biology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China.,Department of Radiology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Yanhong Ji
- Department of Pathogenic Biology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
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24
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Zhao A, Liu Y. Propofol suppresses colorectal cancer development by the circ-PABPN1/miR-638/SRSF1 axis. Anal Biochem 2021; 631:114354. [PMID: 34453920 DOI: 10.1016/j.ab.2021.114354] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 08/19/2021] [Accepted: 08/20/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND Propofol has recently been attracted increasing attention for its anti-tumor property in cancers, including colorectal cancer (CRC). However, the anti-tumor molecular determinants of propofol largely remain to be elucidated. METHODS The levels of circRNA poly(A) binding protein nuclear 1 (circ-PABPN1, hsa_circ_0031288), microRNA (miRNA)-638 and serine and arginine-rich factor 1 (SRSF1) were assessed by quantitative real-time polymerase chain reaction (qRT-PCR) or western blot. Cell viability, colony formation, apoptosis, invasion, and migration were detected by the Cell Counting Kit-8 (CCK-8), colony formation, flow cytometry, transwell, and wound-healing assays, respectively. Animal studies were used to evaluate the biological action of circ-PABPN1 in the propofol-mediated anti-CRC effect. Targeted relationships among circ-PABPN1, miR-638 and SRSF1 were validated by dual-luciferase reporter assays. RESULTS Our data showed the anti-tumor activity of propofol in CRC, as evidenced by the repression in cell viability, colony formation, invasion, migration and the promotion in cell apoptosis in vitro, as well as the suppression in tumor growth in vivo. Circ-PABPN1 was overexpressed in CRC tissues and cells, and propofol down-regulated circ-PABPN1 in a dose-dependent manner. Moreover, circ-PABPN1 was a functional effector of propofol in suppressing CRC development in vitro and in vivo. Circ-PABPN1 directly targeted miR-638, and SRSF1 was a direct target of miR-638. Propofol repressed CRC development in vitro by up-regulating miR-638 or down-regulating SRSF1. Furthermore, propofol regulated SRSF1 expression by the circ-PABPN1/miR-638 axis in CRC cells. CONCLUSION Our current findings identified the circ-PABPN1/miR-638/SRSF1 axis as a novel anti-tumor mechanism of propofol in CRC, providing a new rationale for developing propofol as a promising therapeutic agent for CRC.
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Affiliation(s)
- Aixiang Zhao
- Department of Anesthesiology, Dongying People's Hospital, Dongying City, Shandong Province, China
| | - Yingchun Liu
- Department of Anesthesiology, Dongying People's Hospital, Dongying City, Shandong Province, China.
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25
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Ghafouri-Fard S, Honarmand Tamizkar K, Jamali E, Taheri M, Ayatollahi SA. Contribution of circRNAs in gastric cancer. Pathol Res Pract 2021; 227:153640. [PMID: 34624593 DOI: 10.1016/j.prp.2021.153640] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/22/2021] [Accepted: 09/27/2021] [Indexed: 12/13/2022]
Abstract
Gastric cancer (GC) is one of the most commonly diagnosed neoplasms in the world. A number of environmental and lifestyle factors, particularly chronic infection with Helicobacter pylori, have been found to partake in the pathogenesis of GC. The advent of high-throughput genome and transcriptome analysis has enhanced the knowledge about molecular mechanisms of the pathogenesis of GC. However, data regarding the expression of several circRNAs, such as circLMTK2, are not consistent. We explain the role of circRNAs in the development of GC. We searched databases for the newest publications using the terms gastric cancer and circRNA. Each circRNA alteration, downstream targets, its impacts on cancer cells, and the prognostic and diagnostic roles of these circRNAs have been discussed. Taken together, circRNAs can be putative biomarkers in GC and potential targets for the treatment of this cancer. Yet, this field is still in its infancy and needs further experiments for reaching the clinical application. As these transcripts are stable in circulation, they can be used in non-invasive methods of cancer detection and patients' follow-up.
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Affiliation(s)
- Soudeh Ghafouri-Fard
- Department of Medical Genetics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Kasra Honarmand Tamizkar
- Men's Health and Reproductive Health Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Elena Jamali
- Department of Pathology, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Taheri
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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26
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Xu D, Ma X, Sun C, Han J, Zhou C, Chan MTV, Wu WKK. Emerging roles of circular RNAs in neuropathic pain. Cell Prolif 2021; 54:e13139. [PMID: 34623006 PMCID: PMC8666284 DOI: 10.1111/cpr.13139] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/13/2021] [Accepted: 08/22/2021] [Indexed: 12/12/2022] Open
Abstract
Neuropathic pain is a major type of chronic pain caused by the disease or injury of the somatosensory nervous system. It afflicts about 10% of the general population with a significant proportion of patients’ refractory to conventional medical treatment. This highlights the importance of a better understanding of the molecular pathogenesis of neuropathic pain so as to drive the development of novel mechanism‐driven therapy. Circular RNAs (circRNAs) are a type of non‐coding, regulatory RNAs that exhibit tissue‐ and disease‐specific expression. An increasing number of studies reported that circRNAs may play pivotal roles in the development of neuropathic pain. In this review, we first summarize circRNA expression profiling studies on neuropathic pain. We also highlight the molecular mechanisms of specific circRNAs (circHIPK3, circAnks1a, ciRS‐7, cZRANB1, circZNF609 and circ_0005075) that play key functional roles in the pathogenesis of neuropathic pain and discuss their potential diagnostic, prognostic, and therapeutic utilization in the clinical management of neuropathic pain.
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Affiliation(s)
- Derong Xu
- Department of Spine Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Xuexiao Ma
- Department of Spine Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Chong Sun
- Department of Spine Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Jialuo Han
- Department of Spine Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Chuanli Zhou
- Department of Spine Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Matthew T V Chan
- Department of Anaesthesia and Intensive Care and Peter Hung Pain Research Institute, The Chinese University of Hong Kong, Hong Kong, China
| | - William K K Wu
- Department of Anaesthesia and Intensive Care and Peter Hung Pain Research Institute, The Chinese University of Hong Kong, Hong Kong, China.,State Key Laboratory of Digestive Diseases, LKS Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong, China
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27
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CircAGFG1 acts as a sponge of miR-4306 to stimulate esophageal cancer progression by modulating MAPRE2 expression. Acta Histochem 2021; 123:151776. [PMID: 34461454 DOI: 10.1016/j.acthis.2021.151776] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 08/13/2021] [Accepted: 08/19/2021] [Indexed: 12/13/2022]
Abstract
OBJECTIVE This work aims to determine the role of circular RNA (circRNA) AGFG1 and related molecular mechanism in esophageal squamous cell carcinoma (ESCC) cells. METHODS CircAGFG1 expression in ESCC cell lines was probed with qRT-PCR. ESCC cells were transfected/cotransfected with si-circAGFG1, pcDNA3.1-circAGFG1, si-Microtubule Associated Protein RP/EB Family Member 2 (MAPRE2), pcDNA3.1-circAGFG1 + miR-4306 mimic or pcDNA3.1-circAGFG1 + si-MAPRE2. The interactions between circAGFG1 and miR-4306 as well as miR-4306 and MAPRE2 were confirmed by dual-luciferase reporter assay. Cell proliferation, migration and invasion were detected by CCK-8, cell scratch and Transwell assays, respectively. Relative RNA expression levels of circAGFG1, miR-4306 and MAPRE2 in ESCC cells were measured by qRT-PCR. The protein level of MAPRE2 in ESCC cells was monitored by Western blot. RESULTS CircAGFG1 was observably upregulated in ESCC cell lines. Besides, circAGFG1 silencing hindered ESCC cell development in vitro, and these effects were enhanced by miR-4306 overexpression or MAPRE2 silencing. Mechanistic analysis evidenced that circAGFG1 might act as a competitive endogenous RNA of miR-4306 to relieve the repressive effect of miR-4306 on its target MAPRE2. CONCLUSION CircAGFG1 facilitates ESCC progression via the miR-4306/MAPRE2 axis, and it may act as a possible biomarker for therapy and diagnosis in ESCC treatment.
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28
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MicroRNA-375: potential cancer suppressor and therapeutic drug. Biosci Rep 2021; 41:229736. [PMID: 34494089 PMCID: PMC8458691 DOI: 10.1042/bsr20211494] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 08/31/2021] [Accepted: 09/06/2021] [Indexed: 02/06/2023] Open
Abstract
MiR-375 is a conserved noncoding RNA that is known to be involved in tumor cell proliferation, migration, and drug resistance. Previous studies have shown that miR-375 affects the epithelial-mesenchymal transition (EMT) of human tumor cells via some key transcription factors, such as Yes-associated protein 1 (YAP1), Specificity protein 1 (SP1) and signaling pathways (Wnt signaling pathway, nuclear factor κB (NF-κB) pathway and transforming growth factor β (TGF-β) signaling pathway) and is vital for the development of cancer. Additionally, recent studies have identified microRNA (miRNA) delivery system carriers for improved in vivo transportation of miR-375 to specific sites. Here, we discussed the role of miR-375 in different types of cancers, as well as molecular mechanisms, and analyzed the potential of miR-375 as a molecular biomarker and therapeutic target to improve the efficiency of clinical diagnosis of cancer.
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29
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Li D, Li L, Chen X, Yang W, Cao Y. Circular RNA SERPINE2 promotes development of glioblastoma by regulating the miR-361-3p/miR-324-5p/ BCL2 signaling pathway. MOLECULAR THERAPY-ONCOLYTICS 2021; 22:483-494. [PMID: 34553034 PMCID: PMC8433060 DOI: 10.1016/j.omto.2021.07.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 07/25/2021] [Indexed: 01/26/2023]
Abstract
Circular RNA (circRNA) is a new type of long-sequence RNA formed by a noncanonical form of alternative splicing called back-splicing. Emerging evidence has revealed that circRNAs are involved in cancer progression, regulating cancer-related genes through sponging microRNAs (miRNAs). In our study, we identified a novel upregulated circRNA, circSERPINE2, through analyzing circRNAs microarray data of glioblastoma from GEO datasets (GSE146463). Quantitative real-time PCR was used to further confirm the upregulation of circSERPINE2 in glioblastoma cell lines and tissues. Silencing circSERPINE2 inhibits glioblastoma proliferation in vivo and in vitro through cell counting kit-8 (CCK-8) assay, colony formation assay, flow cytometry analysis, and western blot analysis and xenograft tumor model. Mechanistically, circSERPINE2 could directly sponge miR-324-5p and miR-361-3p. BCL2, known as a novel anti-apoptosis gene, is a target gene both of miR-324-5p and miR-361-3p. Thus, circSERPINE2 promotes BCL2 expression through sponging miR-324-5p and miR-361-3p. In conclusion, our study revealed the biological function and mechanism of circSERPINE2 in glioblastoma progression and that circSERPINE2 could be a potential therapeutic target for glioblastoma.
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Affiliation(s)
- Deheng Li
- Department of Neurosurgery, Fudan University Shanghai Cancer Center, and Department of Oncology, Shanghai Medical College, Fudan University, No. 270 Dongan Road, Xuhui, Shanghai 200032, P.R. China
| | - Liangdong Li
- Department of Neurosurgery, Fudan University Shanghai Cancer Center, and Department of Oncology, Shanghai Medical College, Fudan University, No. 270 Dongan Road, Xuhui, Shanghai 200032, P.R. China
| | - Xin Chen
- Department of Neurosurgery, Fudan University Shanghai Cancer Center, and Department of Oncology, Shanghai Medical College, Fudan University, No. 270 Dongan Road, Xuhui, Shanghai 200032, P.R. China
| | - Wentao Yang
- Department of Pathology, Fudan University Shanghai Cancer Center, and Department of Oncology, Shanghai Medical College, Fudan University, No. 270 Dongan Road, Xuhui, Shanghai 200032, P.R. China
| | - Yiqun Cao
- Department of Neurosurgery, Fudan University Shanghai Cancer Center, and Department of Oncology, Shanghai Medical College, Fudan University, No. 270 Dongan Road, Xuhui, Shanghai 200032, P.R. China
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30
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Hu X, Wang P, Qu C, Zhang H, Li L. Circular RNA Circ_0000677 promotes cell proliferation by regulating microRNA-106b-5p/CCND1 in non-small cell lung cancer. Bioengineered 2021; 12:6229-6239. [PMID: 34519258 PMCID: PMC8806897 DOI: 10.1080/21655979.2021.1965697] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Recently, circular RNAs (circRNAs) have become an intense focus of research and large numbers of circRNAs have been identified, awaiting functional elucidation. Thus, the present study aims to examine the regulation of circRNAs and its molecular mechanism in lung cancer growth. Here, we show that circular RNA circ_0000677 was overexpressed and correlated with poor prognosis in non‐small cell lung cancer (NSCLC) patients. Functionally, circ_0000677 knockdown markedly inhibited proliferation of NSCLC cells by observing of immunofluorescence staining of Ki67, clone formation assay, and xenograft experiments. In mechanism, circ_0000677 acted as a sponge of microRNA-106b and further regulated CCDND1 gene expression in NSCLC cells by dual luciferase activity assay and their expression examination. Taken together, these findings suggest a role for circ_0000677/miR-106b/CCND1 regulation axis in promoting NSCLC growth and progression.
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Affiliation(s)
- Xin Hu
- Department Of Internal Medicine, Nantong Maternity And Child Health Hospital, Nantong, China
| | - Ping Wang
- Department Of Internal Medicine, Nantong Maternity And Child Health Hospital, Nantong, China
| | - Chen Qu
- Department Of Geriatrics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Haibo Zhang
- Department Of Internal Medicine, Nantong Maternity And Child Health Hospital, Nantong, China
| | - Liang Li
- Department Of Emergency Medicine, Shanghai Seventh People's Hospital, Shanghai, China
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31
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Chen W, Zhang B, Chang X. Emerging roles of circular RNAs in osteoporosis. J Cell Mol Med 2021; 25:9089-9101. [PMID: 34490735 PMCID: PMC8500962 DOI: 10.1111/jcmm.16906] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/21/2021] [Accepted: 08/24/2021] [Indexed: 02/06/2023] Open
Abstract
Osteoporosis is one bone disease characterized with skeletal impairment, bone strength reduced and fracture risk enhanced. The regulation processes of bone metabolism are associated with several factors such as mechanical stimulation, epigenetic regulation and hormones. However, the mechanism of osteoporosis remains unsatisfactory. Increasing high‐throughput RNA sequencing and circular RNAs (circRNAs) microarray studies indicated that circRNAs are differentially expressed in osteoporosis. Growing functional studies further pinpointed specific deregulated expressed circRNAs (e.g., circ_28313, circ_0016624, circ_0006393, circ_0076906 and circ_0048211) for their functions involved in bone metabolism, including bone marrow stromal cells (BMSCs) differentiation, proliferation and apoptosis. Moreover, CircRNAs (circ_0002060, Circ_0001275 and Circ_0001445) may be acted as diagnostic biomarkers for osteoporosis. This review discussed recent progresses in the circRNAs expression profiling analyses and their potential functions in regulating BMSCs differentiation, proliferation and apoptosis.
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Affiliation(s)
- Weichun Chen
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Baozhong Zhang
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xiao Chang
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Circular RNA circHIPK3 Activates Macrophage NLRP3 Inflammasome and TLR4 Pathway in Gouty Arthritis via Sponging miR-561 and miR-192. Inflammation 2021; 44:2065-2077. [PMID: 34085163 DOI: 10.1007/s10753-021-01483-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 04/22/2021] [Accepted: 05/19/2021] [Indexed: 10/21/2022]
Abstract
Increasing evidences indicate that circular RNAs (circRNAs) play important roles in regulating gene expressions in various diseases. However, the role of circRNAs in inflammatory response of gouty arthritis remains unknown. This study aims to investigate the role and underlying mechanism of circHIPK3 in inflammatory response of gouty arthritis. Quantitative real-time PCR was used to detect the expressions of circHIPK3, miR-192 and miR-561. Western blot was used to detect the protein levels of TLR4, NLRP3, nuclear factor-κB (NF-κB) related proteins, and Caspase-1. Dual luciferase reporter assay, RNA pull-down assay, and FISH assay were used to confirm the interaction between circHIPK3 and miR-192/miR-561. ELISA was used to detect interleukin (IL)-1β and tumor necrosis factor (TNF)-α levels. circHIPK3 was elevated in synovial fluid mononuclear cells (SFMCs) from patients with gouty arthritis and monosodium urate (MSU)-stimulated THP-1 cells. circHIPK3 overexpression promoted the inflammatory cytokines levels in MSU-stimulated THP-1 cells, and circHIPK3 silencing obtained the opposite effect. Mechanistically, circHIPK3 sponged miR-192 and miR-561, and subsequently promoted the expressions of miR-192 and miR-561 target gene TLR4 and NLRP3. In vivo experiments confirmed circHIPK3 knockdown suppressed gouty arthritis. circHIPK3 sponges miR-192 and miR-561 to promote TLR4 and NLRP3 expressions, thereby promoting inflammatory response in gouty arthritis.
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Sun X, Liu D, Ge N, Guo J, Wang S, Liu X, Wang G, Sun S. Recent Advances in the Potential Use of Circular RNA for the Diagnosis and Treatment of Pancreatic Cancer. Cancer Manag Res 2021; 13:4251-4262. [PMID: 34093039 PMCID: PMC8168960 DOI: 10.2147/cmar.s308809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 04/27/2021] [Indexed: 11/23/2022] Open
Abstract
There are few biomarkers available for the early diagnosis and prognostic evaluation of pancreatic cancer. In addition, the development of targeted therapy for pancreatic cancer is an unmet need due to the lack of molecular targets. With the continuous progress in circular RNA (circRNA)-related research, its role in the occurrence and development of pancreatic cancer has been discovered and gradually recognized. Therefore, circRNA may represent a novel marker for early diagnosis of this disease and a focus of targeted clinical therapy. CircRNA is a type of non-coding RNA with a closed circular structure formed by covalent bonds. Some circRNAs can act as “sponges” to adsorb microRNAs (miRNAs) and play the role of competitive endogenous RNA (ceRNA) to remove their inhibitory effects on the target genes of miRNA. Thus, they can indirectly restore the expression of target genes. The circRNA–miRNA–mRNA network plays a regulatory role in the proliferation, invasion, metastasis, and other biological behaviors of pancreatic cancer. Given the recent advances in circRNA, this review seeks to provide an overview of the biological function of circRNA and highlights the recent research progress regarding the molecular mechanism of circRNA for the clinical diagnosis and treatment of pancreatic cancer.
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Affiliation(s)
- Xinzhu Sun
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China
| | - Dongyan Liu
- Department of Gastroenterology and Medical Research Center, Liaoning Key Laboratory of Research and Application of Animal Models for Environmental and Metabolic Diseases, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China
| | - Nan Ge
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China
| | - Jintao Guo
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China
| | - Sheng Wang
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China
| | - Xiang Liu
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China
| | - Guoxin Wang
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China
| | - Siyu Sun
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China
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Shi H, Huang S, Qin M, Xue X, Guo X, Jiang L, Hong H, Fang J, Gao L. Exosomal circ_0088300 Derived From Cancer-Associated Fibroblasts Acts as a miR-1305 Sponge and Promotes Gastric Carcinoma Cell Tumorigenesis. Front Cell Dev Biol 2021; 9:676319. [PMID: 34124064 PMCID: PMC8188357 DOI: 10.3389/fcell.2021.676319] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 04/26/2021] [Indexed: 01/22/2023] Open
Abstract
Cancer-associated fibroblast (CAF)-derived exosomes play a major role in gastric carcinoma (GC) tumorigenesis. However, the mechanism behind the activity of circular RNAs in CAF-derived exosomes in GC remains unclear. In the present study, we identified differentially expressed circ_0088300 in GC tissues and plasma exosomes. We found that CAFs delivered functional circ_0088300 to GC tumor cells via exosomes and promoted the proliferation, migration and invasion abilities of GC cells. Furthermore, we demonstrated that circ_0088300 packaging into exosomes was driven by KHDRBS3. In addition, we verified that circ_0088300 served as a sponge that directly targeted miR-1305 and promoted GC cell proliferation, migration and invasion. Finally, the JAK/STAT signaling pathway was found to be involved in the circ_0088300/miR-1305 axis, which accelerates GC tumorigenesis. In conclusion, our results indicated a previously unknown regulatory pathway in which exosomal circ_0088300 derived from CAFs acts as a sponge of miR-1305 and promotes GC cell proliferation, migration and invasion; these data identify a potential biomarker and novel therapeutic target for GC in the future.
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Affiliation(s)
- Hao Shi
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Shan Huang
- Department of Pathology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Mingde Qin
- The Stem Cell and Biomedical Material Key Laboratory of Jiangsu Province (The State Key Laboratory Incubation Base), Soochow University, Suzhou, China
| | - Xiaofeng Xue
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Xingpo Guo
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Linhua Jiang
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Han Hong
- Department of Hepato-Pancreato-Biliary Surgery, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Jian Fang
- Department of General Surgery, Zhangjiagang Hospital Affiliated to Soochow University, Zhangjiagang, China
| | - Ling Gao
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
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Circular RNA PLEC acts as a sponge of microRNA-198 to promote gastric carcinoma cell resistance to paclitaxel and tumorigenesis. Pathol Res Pract 2021; 224:153487. [PMID: 34225215 DOI: 10.1016/j.prp.2021.153487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/11/2021] [Accepted: 05/15/2021] [Indexed: 01/07/2023]
Abstract
Gastric carcinoma (GC) is one of the most frequent types of malignancy worldwide. Resistance to paclitaxel (PTX) has become an obstacle to the prognosis of GC, and the underlying mechanism is not clear. A previous study identified GC-related circRNAs via microarray analysis and bioinformatics analysis, and we discovered that circPLEC (hsa_circ_104722) was markedly upregulated in GC tissues and cells. The molecular mechanism of circPLEC in PTX-resistant GC cells still needs to be explored. In the present study, qRT-PCR demonstrated that circPLEC was upregulated in PTX-resistant GC tissues and cells, indicating that circPLEC boosts the PTX resistance of GC. circPLEC downregulation weakened GC resistance to PTX and tumorigenesis, migration and invasion and promoted the apoptosis of PTX-resistant GC cells. MiR-198 inhibitor reversed the effect of circPLEC downreguAlation in PTX-resistant GC cells, and MUC19 downregulation weakened GC resistance to PTX and tumorigenesis and improved the apoptosis of PTX-resistant GC cells. In summary, circPLEC acts as a sponge of miR-198 to promote the PTX resistance and tumorigenesis of GC cells by regulating MUC19 expression.
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Liu Y, Chen T, Zheng G. Exosome-transmitted circ-CARD6 facilitates posterior capsule opacification development by miR-31/FGF7 axis. Exp Eye Res 2021; 207:108572. [PMID: 33844960 DOI: 10.1016/j.exer.2021.108572] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 02/28/2021] [Accepted: 04/03/2021] [Indexed: 12/30/2022]
Abstract
BACKGROUND Posterior capsular opacification (PCO) is the major vision-disrupting complication arising after cataract surgery. Circular RNAs (circRNAs) are biological active RNAs which were involved in various physiological functions. So far, the role of circRNA caspase recruitment domain family member 6 (circ-CARD6) in PCO is still unclear. METHODS Quantitative real-time polymerase chain reaction (qRT-PCR) was applied to detect the expression of circ-CARD6, microRNA 31 (miR-31) and fibroblast growth factor 7 (FGF7) message RNA (mRNA). Western blot was used to analyze the protein expression. Transmission electron microscopy (TEM) was employed to capture the exosome image. The proliferation and metastasis were analyzed by cell counting kit-8 (CCK8), transwell and wound healing assays. The potential binding sequences between miR-31 and circ-CARD6 or FGF7 were respectively predicted by Circinteractome and Targetscan online tool, and verified by dual-luciferase reporter and RNA binding protein immunoprecipitation (RIP) assays. RESULTS Exosome-transmitted circ-CARD6 was highly expressed in PCO tissues and TGF-β2-treated SRA01/04 cells. Circ-CARD6 deletion repressed the proliferation, metastasis, EMT process and MAPK pathway, which was reversed by anti-miR-31 in TGF-β2-treated SRA01/04 cells. Meanwhile, circ-CARD6 sponged miR-31 which directly targeted FGF7 in TGF-β2-treated SRA01/04 cells. FGF7 overexpression allayed miR-31 overexpression-induced suppression in proliferation, metastasis, EMT process and MAPK pathway. Besides, circ-CARD6 regulated FGF7 expression by sponging miR-31. CONCLUSION Circ-CARD6 promoted PCO development via miR-31/FGF7 axis. This finding might contribute to the development of the targeted therapy for PCO.
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Affiliation(s)
- Yue Liu
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Tao Chen
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Guangying Zheng
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China.
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CircSERPINE2 weakens IL-1β-caused apoptosis and extracellular matrix degradation of chondrocytes by regulating miR-495/TGFBR2 axis. Biosci Rep 2021; 40:226746. [PMID: 33094798 PMCID: PMC7610148 DOI: 10.1042/bsr20201601] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 10/07/2020] [Accepted: 10/13/2020] [Indexed: 12/14/2022] Open
Abstract
The dysregulated circular RNAs (circRNAs) are relevant to the development of osteoarthritis (OA). The circRNA serpin family E member 2 (circSERPINE2) is dysregulated in OA, while the role and mechanism of circSERPINE2 in OA are largely unknown. The aim of our research is to explore how and whether circSERPINE2 regulates interleukin-1β (IL-1β)-caused chondrocyte damage in OA. In the present study, the chondrocytes (CHON-001 cells) were exposed to IL-1β to mimic the injury in OA. CircSERPINE2, microRNA-495 (miR-495) and transforming growth factor-β receptor 2 (TGFBR2) abundances were detected via quantitative reverse-transcription polymerase chain reaction (qRT-PCR) or Western blot. Cell apoptosis was assessed via viability, apoptotic rate and caspase-3 activity. Extracellular matrix was investigated by levels of Sry-type high-mobility-group box 9 (SOX9), collagen type II α 1 (COL2A1) and Aggrecan using Western blot. The interaction among circSERPINE2, miR-495 and TGFBR2 was assessed via dual-luciferase reporter analysis and RNA immunoprecipitation (RIP). The results showed that circSERPINE2 expression was reduced in OA patients and IL-1β-treated chondrocytes. CircSERPINE2 overexpression mitigated IL-1β-caused apoptosis and extracellular matrix degradation. miR-495 was targeted by circSERPINE2 and up-regulated in OA patients and IL-1β-treated chondrocytes. miR-495 up-regulation reversed overexpression of circSERPINE2-mediated inhibition of apoptosis and extracellular matrix degradation. TGFBR2 was targeted by miR-495 and lowly expressed in OA patients and IL-1β-treated chondrocytes. CircSERPINE2 could mediate TGFBR2 expression by binding with miR-495. As a conclusion, circSERPINE2 attenuated IL-1β-caused apoptosis and extracellular matrix degradation of chondrocytes by regulating miR-495/TGFBR2 axis, indicating a new target for OA treatment.
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Cui X, Feng J, Wu J, Zhang X, Ding M. Propofol postpones colorectal cancer development through circ_0026344/miR-645/Akt/mTOR signal pathway. Open Med (Wars) 2021; 16:570-580. [PMID: 33869779 PMCID: PMC8034241 DOI: 10.1515/med-2021-0254] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 02/04/2021] [Accepted: 02/26/2021] [Indexed: 12/26/2022] Open
Abstract
Colorectal cancer (CRC) is responsible for thousands of slow and painful annual deaths. Propofol, an anesthetic, is commonly used in CRC surgery. The role of circularRNA0026344 (circ_0026344) in propofol-treated CRC remains unclear, which was further explored in this study. Real-time polymerase chain reaction (qPCR) was used to detect the expression of circ_0026344 and microRNA645 (miR-645) in CRC cells and normal cells. Western blot was devoted to testing the protein expression of phospho-protein kinase B (p-AKT), AKT, phospho-mammalian target of rapamycin (p-mTOR), and mTOR in CRC cells. Moreover, cell counting kit-8 (CCK8), colony formation, flow cytometry, and transwell assays were employed to assess the proliferation, apoptosis, and metastasis in CRC cells. Circinteractome online tool was applied to predict the combination between circ_0026344 and miR-645, which was further verified by dual-luciferase reporter system. circ_0026344 was lowly expressed and miR-645 was abundantly expressed in CRC cells. The relative protein expression of p-AKT/AKT and p-mTOR/mTOR was strikingly elevated by si-circ#1, which could be reversed by anti-miR-645 in propofol-treated CRC cells. circ_0026344 overexpression inhibited the proliferation and metastasis and promoted apoptosis in CRC cells. Propofol treatment induced the restraint in proliferation and metastasis and stimulation in apoptosis, which were allayed by si-circ#1; meanwhile, this alleviation could further be abolished by anti-miR-645 in CRC cells. Furthermore, circ_0026344 sponged miR-645 to inhibited Akt/mTOR signal pathway in propofol-treated CRC cells. Propofol postponed CRC process by circ_0026344/miR-645/Akt/mTOR axis. This finding might provide a possibility to improve the therapy of CRC with propofol.
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Affiliation(s)
- Xiaomin Cui
- Department of Postanesthesia Care Unit, The Affiliated Hospital of Kangda College of Nanjing Medical University (The First People's Hospital of Lianyungang), Lianyungang, Jiangsu, China
| | - Jiying Feng
- Department of Anesthesiology, The Affiliated Hospital of Kangda College of Nanjing Medical University (The First People's Hospital of Lianyungang), Lianyungang, Jiangsu, China
| | - Jian Wu
- Department of Emergency, The First People's Hospital of Lianyungang, Lianyungang, Jiangsu, China
| | - Xiaobao Zhang
- Department of Anesthesiology, The Affiliated Hospital of Kangda College of Nanjing Medical University (The First People's Hospital of Lianyungang), Lianyungang, Jiangsu, China
| | - Mengyao Ding
- Department of Anesthesiology, The Affiliated Hospital of Kangda College of Nanjing Medical University (The First People's Hospital of Lianyungang), No. 188 Jianshe East Road, Lianyungang, 222002, Jiangsu, China
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Huang M, Long Y, Jin Y, Ya W, Meng D, Qin T, Su L, Zhou W, Wu J, Huang C, Huang Q. Comprehensive analysis of the lncRNA-miRNA-mRNA regulatory network for bladder cancer. Transl Androl Urol 2021; 10:1286-1301. [PMID: 33850763 PMCID: PMC8039630 DOI: 10.21037/tau-21-81] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Background Long non-coding RNAs (lncRNAs) are essential regulators for various human cancers. However, these lncRNAs need to be further classified for cancer. In the present study, we identified novel competing endogenous RNA (ceRNA) network for bladder cancer (BC) and explored the gene functions of the ceRNA regulatory network. Methods Differential gene expression analysis were performed on The Cancer Genome Atlas Urothelial Bladder Carcinoma (TCGA-BLCA) datasets to identify differentially expressed messenger RNAs (mRNAs), lncRNAs, and microRNAs (miRNAs). Based on the competing endogenous RNA (ceRNA) hypothesis, a lncRNA-miRNA-mRNA network was constructed using the StarBase database and visualization by Cytoscape software. Functional enrichment analyses of Gene Ontology and the Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway were performed via R package ClusterProfiler. The protein-protein interaction network was constructed by STRING database and visualization by Cytoscape. Finally, we used CIBERSORT and the TIMER database to analyze the immune infiltrations for BC. Results The regulatory network was constructed via TCGA BLCA cohort. The differential expressions of lncRNA, miRNA, and mRNA were 186, 200, and 2,661, respectively. There were 106 lncRNA, miRNA, and mRNA included in the ceRNA network. In this network, Calcium Voltage-gated Channel Auxiliary Subunit Alpha2delta1 (CACNA2D1, P<0.001), domain containing engulfment adaptor1 (GULP1, P=0.001), latent transforming growth factor beta binding protein 1 (LTBP1, P=0.006), myosin light chain kinase (MYLK, P=0.001), serpin family E member 2 (SERPINE2, P=0.002), spectrin beta non-erythrocytic 2 (SPTBN2, P=0.047), and hsa-miR-590-3p (P<0.001) significantly affected the prognosis of BC patients. Functional enrichment analyses showed that the biological functions included negative regulation of protein phosphorylation, cell morphogenesis, and sensory organ morphogenesis. Important cancer pathways of KEGG included parathyroid hormone synthesis secretion action, the notch signaling pathway, MAPK signaling pathway, the Rap1 signaling pathway, signaling pathways regulating the pluripotency of stem cells, and the transforming growth factor-β signaling pathway. Our findings demonstrated that the ceRNA network has important biological functions and a significant influence on the prognosis of BC. Conclusions The lncRNA-miRNA-mRNA network constructed in the present study could provide useful insight into the underlying tumorigenesis of BC, and can determine new molecular biomarkers for the diagnosis and therapeutical treatment of BC.
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Affiliation(s)
- Minyu Huang
- Department of Urology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Yi Long
- Department of Urology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Yuzhu Jin
- Department of Urology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Wentong Ya
- Department of Urology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Dongdong Meng
- Department of Urology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Tianzi Qin
- Department of Urology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Lize Su
- Department of Urology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Wei Zhou
- Department of Urology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Jichao Wu
- Department of Urology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Chunhe Huang
- Department of Infectious Disease, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Qun Huang
- Department of Urology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
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Wu X, Yan L, Liu Y, Shang L. Circ_0000527 promotes osteosarcoma cell progression through modulating miR-646/ARL2 axis. Aging (Albany NY) 2021; 13:6091-6102. [PMID: 33617480 PMCID: PMC7950279 DOI: 10.18632/aging.202602] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 11/25/2020] [Indexed: 01/04/2023]
Abstract
Accumulating evidence shows that circRNAs play critical roles in the development of human tumors. We observed that circ_0000527 was overexpressed in osteosarcoma cells (SAOS-2, HOS, MG-63 and U2OS) compared in hFOB1.19 cells. We demonstrated that the circ_0000527 level was higher in osteosarcoma specimens than in non-tumor specimens. The ectopic expression of circ_0000527 was shown to induce cell growth, cell cycle progression and the secretion of inflammatory mediators, including IL-1β, IL-6, IL-8 and TNF-α. We demonstrated that circ_0000527 sponges miR-646 in osteosarcoma cells and that ARL2 is a target gene of miR-646. MiR-646 expression was decreased and ARL2 was overexpressed in osteosarcoma cells (SAOS-2, HOS, MG-63 and U2OS) compared to hFOB1.19 cells. Overexpression of circ_0000527 was demonstrated to induce ARL2 expression in MG-63 cells. We showed that miR-646 was downregulated in osteosarcoma specimens compared to that of non-tumor specimens and that the level of circ_0000527 was negatively correlated with miR-646 expression in osteosarcoma specimens. The elevated expression of circ_0000527 was shown to promote cell growth and cell cycle progression by modulating miR-646 expression. The ectopic expression of circ_0000527 was shown to promote cell growth, cell cycle progression and the secretion of inflammatory mediators by modulating ARL2. The present study suggested that the circ_0000527/miR-646/ARL2 axis may be a potential treatment target for osteosarcoma.
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Affiliation(s)
- Xiangkun Wu
- Department of Orthopaedic Surgery, Nanyang Second People's Hospital, Nanyang 473000, Henan, China
| | - Lihua Yan
- Department of Medical Oncology, Nanyang Second People's Hospital, Nanyang 473000, Henan, China
| | - Yongxi Liu
- Department of Orthopaedic Surgery, Nanyang Second People's Hospital, Nanyang 473000, Henan, China
| | - Lilin Shang
- Department of Orthopaedic Surgery, Nanyang Second People's Hospital, Nanyang 473000, Henan, China
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CircAgtpbp1 Acts as a Molecular Sponge of miR-543-5p to Regulate the Secretion of GH in Rat Pituitary Cells. Animals (Basel) 2021; 11:ani11020558. [PMID: 33672649 PMCID: PMC7924184 DOI: 10.3390/ani11020558] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 02/15/2021] [Accepted: 02/16/2021] [Indexed: 12/29/2022] Open
Abstract
CircRNAs have been identified to be expressed differently and stably in numerous species and tissues, but their functions in growth hormone (GH) secretion are still largely unknown. In summary, we have revealed a circRNA-miRNA-mRNA network that may play a biological role in the rat pituitary gland. First, we verified the chromosome location information of circAgtpbp1 according to sequencing analysis. The circAgtpbp1 characteristics were authenticated through PCR, qRT-PCR, treating with RNase and fluorescent in situ hybridization (FISH). Second, we detected the expression pattern of circAgtpbp1 in the rat anterior pituitary by qRT-PCR. We also designed circAgtpbp1 siRNA and constructed overexpression plasmid to evaluate the effect of circAgtpbp1 function on GH secretion by qRT-PCR, ELISA and Western blot. CircAgtpbp1 is a stable, truly circular molecule. We found that circAgtpbp1 interacted with miR-543-5p and can regulate GH secretion in pituitary cells through a circAgtpbp1-miR-543-5p-GH axis. Overall, the evidence generated by our study suggests that circAgtpbp1 can act as a sponge of miR-543-5p to reduce the inhibitory effect of miR-543-5p on Gh1 and further promote GH secretion. These findings expand our existing knowledge on the mechanisms of hormone regulation in the pituitary gland.
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Tang X, Ren H, Guo M, Qian J, Yang Y, Gu C. Review on circular RNAs and new insights into their roles in cancer. Comput Struct Biotechnol J 2021; 19:910-928. [PMID: 33598105 PMCID: PMC7851342 DOI: 10.1016/j.csbj.2021.01.018] [Citation(s) in RCA: 180] [Impact Index Per Article: 60.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 01/13/2021] [Accepted: 01/14/2021] [Indexed: 12/13/2022] Open
Abstract
Circular RNAs (circRNAs) are a very interesting class of conserved single-stranded RNA molecules derived from exonic or intronic sequences by precursor mRNA back-splicing. Unlike canonical linear RNAs, circRNAs form covalently closed, continuous stable loops without a 5'end cap and 3'end poly(A) tail, and therefore are resistant to exonuclease digestion. The majority of circRNAs are highly abundant, and conserved across different species with a tissue or developmental-stage-specific expression. circRNAs have been shown to play important roles as microRNA sponges, regulators of gene splicing and transcription, RNA-binding protein sponges and protein/peptide translators. Emerging evidence reveals that circRNAs function in various human diseases, particularly cancers, and may function as better predictive biomarkers and therapeutic targets for cancer treatment. In consideration of their potential clinical relevance, circRNAs have become a new research hotspot in the field of tumor pathology. In the present study, the current understanding of the biogenesis, characteristics, databases, research methods, biological functions subcellular distribution, epigenetic regulation, extracellular transport and degradation of circRNAs was discussed. In particular, the multiple databases and methods involved in circRNA research were first summarized, and the recent advances in determining the potential roles of circRNAs in tumor growth, migration and invasion, which render circRNAs better predictive biomarkers, were described. Furthermore, future perspectives for the clinical application of circRNAs in the management of patients with cancer were proposed, which could provide new insights into circRNAs in the future.
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Key Words
- AML, acute myloid leukemia
- BSJ, back-splice junction
- Biomarker
- CLL, chronic lymphocytic leukemia
- CML, chronic myeloid leukemia
- CRC, colorectal cancer
- Cancer
- Circular RNAs
- EIciRNAs, exon–intron RNAs
- EMT, epithelial-mesenchymal transition
- Functions
- GC, gastric cancer
- HCC, hepatocellular carcinoma
- ISH, in situ hybridization
- LUAD, lung adenocarcinoma
- MER, miRNA response elements
- MM, multiple myeloma
- NSCLC, non-small cell lung cancer
- PCR, polymerase chain reaction
- PDAC, pancreatic ductal adenocarcinoma
- RBP, RNA-binding protein
- RNA, ribonucleic acid
- RNase, ribonuclease
- RT-PCR, reverse transcription-PCR
- TNM, tumor node metastases
- UTR, untranslated regions
- ccRCC, clear cell renal cell carcinoma
- ceRNAs, endogenous RNAs
- ciRNAs, circular intronic RNAs
- ciRS-7, circular RNA sponge for miR-7
- circRNAs, circular RNAs
- ecircRNAs, exonic circular RNAs
- lncRNAs, long ncRNA
- miRNAs, microRNAs
- ncRNAs, noncoding RNAs
- qPCR, quantitative PCR
- rRNA, ribosomal RNA
- siRNAs, small interfering RNAs
- snRNA, small nuclear RNA
- tricRNAs, tRNA intronic circRNAs
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Affiliation(s)
- Xiaozhu Tang
- The Third Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing 210001, China
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Hongyan Ren
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Mengjie Guo
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Jinjun Qian
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Ye Yang
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Chunyan Gu
- The Third Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing 210001, China
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
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Yang X, Wang J, Li H, Sun Y, Tong X. Downregulation of hsa_circ_0026123 suppresses ovarian cancer cell metastasis and proliferation through the miR‑124‑3p/EZH2 signaling pathway. Int J Mol Med 2020; 47:668-676. [PMID: 33416105 PMCID: PMC7797451 DOI: 10.3892/ijmm.2020.4804] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 10/08/2020] [Indexed: 12/12/2022] Open
Abstract
Circular RNAs (circRNAs) play a role in various types of cancer. The present study suggested that hsa_ circ_0026123 expression was upregulated in ovarian cancer (OVA), which was associated with its role in OVA. However, the role of hsa_circ_0026123 in OVA cell invasion and proliferation remains unclear. In the present study, OVA tissues and cell lines were used to investigate the functions of hsa_circ_0026123. The associations between hsa_circ_0026123, miR-124-3p and enhancer of zeste homolog 2 (EZH2) were examined using a luciferase reporter assay. RT-qPCR and western blot analysis were used for gene and protein expression analysis, respectively. Tumor growth was detected using nude mouse tumor xenografts derived from SKOV3 cells, with or without hsa_circ_0026123 downregulation. The results confirmed that hsa_circ_0026123 expression was upregulated in OVA tissues and cell lines, while hsa_circ_0026123 silencing suppressed cell proliferation and migration; it also suppressed the expression of cancer stem cell (CSC) differentiation-related markers in either in vivoor in vitro experiments. The data revealed that hsa_circ_0026123 downregulation suppressed EZH2 expression by miR-124-3p 'sponging', which was confirmed by rescue experiments and luciferase reporter assays. The results revealed that hsa_circ_0026123 silencing suppressed ovarian cancer cell progression via the miR-124-3p/EZH2 signaling pathway. Overall, the findings demonstrated that hsa_circ_0026123 knockdown inhibited OVA cell progression by regulating the miR-124-3p/EZH2 axis. This methodology may thus be used for the targeted therapy of OVA, as well as a candidate biomarker for the diagnosis and treatment of OVA.
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Affiliation(s)
- Xiaoyun Yang
- Department of Gynecology and Obstetrics, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Jianjun Wang
- Department of Gynecology and Obstetrics, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Huaifang Li
- Department of Gynecology and Obstetrics, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
| | - Yi Sun
- Department of Gynecology and Obstetrics, Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200336, P.R. China
| | - Xiaowen Tong
- Department of Gynecology and Obstetrics, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, P.R. China
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Chen L, Chi K, Xiang H, Yang Y. Circ_0032821 Facilitates Gastric Cancer Cell Proliferation, Migration, Invasion and Glycolysis by Regulating MiR-1236-3p/HMGB1 Axis. Cancer Manag Res 2020; 12:9965-9976. [PMID: 33116853 PMCID: PMC7567569 DOI: 10.2147/cmar.s270164] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 09/10/2020] [Indexed: 01/03/2023] Open
Abstract
Background Circular RNAs (circRNAs) play an essential role in the pathogenesis of malignant tumors, including gastric cancer (GC). However, the effect of circ_0032821 on GC remains largely unknown. Methods QRT-PCR assay was employed to examine the levels of circ_0032821, CEP128 mRNA and miR-1236-3p. RNase R digestion assay was utilized to verify the feature of circ_0032821. Cell Counting Kit-8 (CCK-8) assay and transwell assay were adopted to evaluate cell proliferation and metastasis. The level of glycolysis was evaluated through detecting ECAR, OCR, lactate production, glucose uptake and ATP synthesis. Dual-luciferase reporter assay and RIP assay were conducted to analyze the relationship between miR-1236-3p and circ_0032821 or HMGB1. Western blot assay was adopted for high mobility group box 1 (HMGB1) level. Murine xenograft model assay was utilized for the effect of circ_0032821 in vivo. Results High level of circ_0032821 was observed in GC tissues and cells. Silencing of circ_0032821 markedly repressed cell proliferation, metastasis and glycolysis in GC cells in vitro and blocked tumorigenesis of GC in vivo. For mechanism analysis, circ_0032821 was identified as the sponge of miR-1236-3p and HMGB1 was the target gene of miR-1236-3p. Moreover, miR-1236-3p suppression restored the influences of circ_0032821 deficiency on GC cell proliferation, metastasis and glycolysis. Overexpression of miR-1236-3p relieved the malignant behaviors of GC cells by targeting HMGB1. Conclusion Circ_0032821 accelerated GC development through elevating HMGB1 expression via sponging miR-1236-3p.
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Affiliation(s)
- Lei Chen
- Department of Emergency Medicine, Xiang'an Hospital of Xiamen University, Xiamen, 361101, People's Republic of China
| | - Kun Chi
- Department of Nursing, Qingdao Municipal Hospital (Group), Qingdao 266071, People's Republic of China
| | - Huaguo Xiang
- Medical Laboratory, Shenzhen Baoan District Fuyong People's Hospital, Shenzhen 518103, People's Republic of China
| | - Yan Yang
- Department of Gastroenterology, Central People's Hospital of Tengzhou, Tengzhou 277500, People's Republic of China
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Li Q, Huyan T, Cai S, Huang Q, Zhang M, Peng H, Zhang Y, Liu N, Zhang W. The role of exosomal miR-375-3p: A potential suppressor in bladder cancer via the Wnt/β-catenin pathway. FASEB J 2020; 34:12177-12196. [PMID: 32716585 DOI: 10.1096/fj.202000347r] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 06/09/2020] [Accepted: 06/29/2020] [Indexed: 12/24/2022]
Abstract
miR-375-3p is a significantly downregulated miRNA in bladder cancer (BC). However, its role in BC regulation is still unclear. In this study, we reported that miR-375-3p overexpression inhibited proliferation and migration and promoted apoptosis in BC cells. Frizzled-8 (FZD8) gene is identified as the direct miR-375-3p targeting gene. miR-375-3p blocks the Wnt/β-catenin pathway and downstream molecules Cyclin D1 and c-Myc by inhibiting the expression of FZD8 directly, it could increase caspase 1 and caspase 3 expression and promote T24 cell apoptosis as well. miR-375-3p also showed a significant inhibitory effect in vivo in bladder tumor-bearing nude mice, as demonstrated by the reduced tumor volume and Ki67 proliferation index in tumor tissue. Collectively, miR-375-3p is a suppressor of BC that inhibits proliferation and metastasis, and promotes apoptosis in BC cells as well as suppresses tumor growth in a T24 xenograft mouse model, which could be used as a potential therapeutic approach for BC in future.
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Affiliation(s)
- Qi Li
- Key Laboratory for Space Bioscience and Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, China
| | - Ting Huyan
- Key Laboratory for Space Bioscience and Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, China.,Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, China
| | - Suna Cai
- Key Laboratory for Space Bioscience and Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, China
| | - Qiuping Huang
- Key Laboratory for Space Bioscience and Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, China
| | - Mengzhao Zhang
- Department of Urology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Hourong Peng
- Key Laboratory for Space Bioscience and Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, China
| | - Yujun Zhang
- Key Laboratory for Space Bioscience and Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, China
| | - Ningjing Liu
- Key Laboratory for Space Bioscience and Space Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, China
| | - Wei Zhang
- Department of Anesthesiology, Henan Provincial People's Hospital (People's Hospital of Zhengzhou University), Zhengzhou, China
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46
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Xie S, Chang Y, Jin H, Yang F, Xu Y, Yan X, Lin A, Shu Q, Zhou T. Non-coding RNAs in gastric cancer. Cancer Lett 2020; 493:55-70. [PMID: 32712234 DOI: 10.1016/j.canlet.2020.06.022] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/19/2020] [Accepted: 06/28/2020] [Indexed: 12/11/2022]
Abstract
Non-coding RNAs (ncRNAs) are functional RNA molecules that play crucial regulatory roles in many fundamental biological processes. The dysregulation of ncRNAs is significantly associated with the progression of human cancers, including gastric cancer. In this review, we have summarized the oncogenic or tumor-suppressive roles and the regulatory mechanisms of lncRNAs, miRNAs, circRNAs and piRNAs, and have discussed their potential as biomarkers or therapeutic targets in gastric cancer.
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Affiliation(s)
- Shanshan Xie
- The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, 310052, China; Department of Cell Biology and Cancer Institute of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Yongxia Chang
- Department of Cell Biology and Cancer Institute of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China; Cancer Center, Zhejiang University, Hangzhou, 310058, China
| | - Hao Jin
- Department of Cell Biology and Cancer Institute of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China; Cancer Center, Zhejiang University, Hangzhou, 310058, China
| | - Feng Yang
- Department of Cell Biology and Cancer Institute of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China; Cancer Center, Zhejiang University, Hangzhou, 310058, China
| | - Yanjun Xu
- Institute of Cancer Research and Basic Medical Sciences of Chinese Academy of Sciences, Cancer Hospital of University of Chinese Academy of Sciences, Zhejiang Cancer Hospital, Hangzhou, 310022, China
| | - Xiaoyi Yan
- Cancer Center, Zhejiang University, Hangzhou, 310058, China
| | - Aifu Lin
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China.
| | - Qiang Shu
- The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, 310052, China.
| | - Tianhua Zhou
- Department of Cell Biology and Cancer Institute of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China; Cancer Center, Zhejiang University, Hangzhou, 310058, China; Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada.
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47
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Chen P, Yao Y, Yang N, Gong L, Kong Y, Wu A. Circular RNA circCTNNA1 promotes colorectal cancer progression by sponging miR-149-5p and regulating FOXM1 expression. Cell Death Dis 2020; 11:557. [PMID: 32699205 PMCID: PMC7376054 DOI: 10.1038/s41419-020-02757-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 05/19/2020] [Accepted: 05/21/2020] [Indexed: 11/18/2022]
Abstract
Circular RNAs (circRNAs) are an emerging class of non-coding RNAs, identified to participate in multiple malignancies. Nevertheless, the clinical significance, biological function, and regulatory mechanisms of circRNAs in colon cancer (CC) remain largely unclear. In this study, the circRNA expression profile in CC and matched normal tissues was analyzed using circRNA microarrays. A novel circRNA, circCTNNA1, was significantly upregulated in CC, and its level was associated with advanced tumor–node–metastasis stage and poor prognosis of patients with CC. Functional experiments, including Cell Counting Kit-8, colony formation, 5‐ethynyl‐2′‐deoxyuridine, transwell, wound healing, flow cytometric analysis, and in vivo tumorigenesis assay were then performed to investigate the oncogenic role of circCTNNA1. The results revealed that circCTNNA1 promoted CC cell proliferation, migration, and invasion in vitro and in vivo. Mechanistically, RNA pull-down, RNA immunoprecipitation, dual-luciferase reporter assays, and fluorescent in situ hybridization were performed to unveil that circCTNNA1 can serve as a competing endogenous RNA of miR-149-5p to counteract the suppressive effect of miR-149-5p on downstream target Forkhead Box M1 (FOXM1). In summary, our study demonstrated that circCTNNA1 facilitated CC proliferation and invasion via the circCTNNA1/miR-149-5p/FOXM1 axis, and it might function as a novel diagnostic or therapeutic target for patients with CC.
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Affiliation(s)
- Pengju Chen
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Unit III & Ostomy Service, Gastrointestinal Cancer Center, Peking University Cancer Hospital & Institute, Beijing, 100142, China.
| | - Yunfeng Yao
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Unit III & Ostomy Service, Gastrointestinal Cancer Center, Peking University Cancer Hospital & Institute, Beijing, 100142, China
| | - Nan Yang
- Department of Newborn Screening, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital, Beijing, 100026, China
| | - Lifei Gong
- Department of Newborn Screening, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital, Beijing, 100026, China
| | - Yuanyuan Kong
- Department of Newborn Screening, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital, Beijing, 100026, China
| | - Aiwen Wu
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Unit III & Ostomy Service, Gastrointestinal Cancer Center, Peking University Cancer Hospital & Institute, Beijing, 100142, China
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Pereira AL, Magalhães L, Pantoja RP, Araújo G, Ribeiro-dos-Santos Â, Vidal AF. The Biological Role of Sponge Circular RNAs in Gastric Cancer: Main Players or Coadjuvants? Cancers (Basel) 2020; 12:E1982. [PMID: 32708088 PMCID: PMC7409348 DOI: 10.3390/cancers12071982] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/16/2020] [Accepted: 06/17/2020] [Indexed: 12/24/2022] Open
Abstract
Circular RNAs (circRNAs) are a new class of long noncoding RNAs able to perform multiple functions, including sponging microRNAs (miRNAs) and RNA-Binding Proteins (RBPs). They play an important role in gastric carcinogenesis, but its involvement during gastric cancer (GC) development and progression are not well understood. We gathered miRNA and/or RBPs sponge circRNAs present in GC, and accessed their biological roles through functional enrichment of their target genes or ligand RBPs. We identified 54 sponge circRNAs in GC that are able to sponge 51 miRNAs and 103 RBPs. Then, we evaluated their host gene expression using The Cancer Genome Atlas (TCGA) database and observed that COL1A2 is the most overexpressed gene, which may be due to circHIPK3/miR-29b-c/COL1A2 axis dysregulation. We identified 27 GC-related pathways that may be affected mainly by circPVT1, circHIPK3 and circNF1. Our results indicate that circHIPK3/miR-107/BDNF/LIN28 axis may mediate chemoresistance in GC, and that circPVT1, circHIPK3, circNF1, ciRS-7 and circ_0000096 appear to be involved in gastrointestinal cancer development. Lastly, circHIPK3, circNRIP1 and circSMARCA5 were identified in different ethnic populations and may be ubiquitous modulators of gastric carcinogenesis. Overall, the studied sponge circRNAs are part of a complex RBP-circRNA-miRNA-mRNA interaction network, and are involved in the establishment, chemoresistance and progression of GC.
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Affiliation(s)
- Adenilson Leão Pereira
- Faculty of Medicine, Federal University of Pará, Altamira 68371-163, Brazil;
- Research Center on Oncology, Graduate Program of Oncology and Medical Science, Federal University of Pará, Belém 66073-000, Brazil;
| | - Leandro Magalhães
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém 66075-110, Brazil; (L.M.); (R.P.P.); (G.A.)
| | - Rafael Pompeu Pantoja
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém 66075-110, Brazil; (L.M.); (R.P.P.); (G.A.)
| | - Gilderlanio Araújo
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém 66075-110, Brazil; (L.M.); (R.P.P.); (G.A.)
| | - Ândrea Ribeiro-dos-Santos
- Research Center on Oncology, Graduate Program of Oncology and Medical Science, Federal University of Pará, Belém 66073-000, Brazil;
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém 66075-110, Brazil; (L.M.); (R.P.P.); (G.A.)
| | - Amanda Ferreira Vidal
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém 66075-110, Brazil; (L.M.); (R.P.P.); (G.A.)
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Zhang L, Wu J, Li Y, Jiang Y, Wang L, Chen Y, Lv Y, Zou Y, Ding X. Circ_0000527 promotes the progression of retinoblastoma by regulating miR-646/LRP6 axis. Cancer Cell Int 2020; 20:301. [PMID: 32669977 PMCID: PMC7350616 DOI: 10.1186/s12935-020-01396-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 07/01/2020] [Indexed: 02/08/2023] Open
Abstract
Background Researches validate that circular RNAs (circRNAs) are dysregulated in a variety of malignancies and play an important role in regulating the malignant phenotype of tumor cells. Nevertheless, the role of circ_0000527 in retinoblastoma (RB) and its regulatory mechanisms remain largely unknown. Methods Real-time PCR (RT-PCR) was used to detect circ_0000527 and miR-646 expression in RB tissues and cells. The LRP6 expression in RB cells was detected by Western blot. The relationship between circ_0000527 expression and the clinicopathological parameters of RB patients was analyzed. Cell proliferation, apoptosis and metastasis were monitored by cell counting kit-8 (CCK-8), flow cytometry, and Transwell assay. The dual-luciferase reporter gene assay and RIP assay were employed to verify the targeting relationship between circ_0000527 and miR-646, miR-646 and LRP6. Results Circ_0000527 was highly expressed in both RB and RB cell lines, whose high expression level and degree of differentiation were significantly correlated with the increase in cTNM staging level. Overexpression of circ_0000527 contributed to RB cell proliferation, migration, invasion and suppressed cell apoptosis, while knocking down circ_0000527 inhibited the above malignant biological behavior. The underlying mechanism suggested that functioning as a endogenous competitive RNA, circ_0000527 directly targeted miR-646 and positively regulated LRP6 expression. Conclusion Circ_0000527 enhances the proliferation and metastasis of RB cells by modulating the miR-646/LRP6 axis.
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Affiliation(s)
- Li Zhang
- Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, 266003 Shandong China
| | - Jie Wu
- Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, 266003 Shandong China
| | - Yujun Li
- Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, 266003 Shandong China
| | - Yanxia Jiang
- Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, 266003 Shandong China
| | - Lili Wang
- Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, 266003 Shandong China
| | - Yunqing Chen
- Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, 266003 Shandong China
| | - Yalin Lv
- Department of Dermatology, The Affiliated Hospital of Qingdao University, No 16, Jiangsu Road, South District, Qingdao, 266003 Shandong China
| | - Yuwei Zou
- Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, 266003 Shandong China
| | - Xiaoyan Ding
- Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, 266003 Shandong China
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50
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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] [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.
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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
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