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Sun X, Zhu H, Cao R, Zhang J, Wang X. BACH1 is transcriptionally inhibited by TET1 in hepatocellular carcinoma in a microRNA-34a-dependent manner to regulate autophagy and inflammation. Pharmacol Res 2021; 169:105611. [PMID: 33878446 DOI: 10.1016/j.phrs.2021.105611] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 03/22/2021] [Accepted: 04/09/2021] [Indexed: 12/24/2022]
Abstract
Hepatocellular carcinoma (HCC), one of the main contributors to cancer-associated deaths globally, is characterized by high invasiveness. Herein, we studied the molecular mechanisms underlying ten-eleven translocation 1 (TET1)-mediated autophagy in HCC. Following data mining using GSE101728, GSE14520 and GSE138178, TET1 was screened out, and the differential expression of TET1 was verified by bioinformatics analysis. TET1, one of the prognostic markers in HCC, was poorly expressed in HCC. Through functional experiments, we determined that upregulation of TET1 inhibited the proliferation, migration, invasion, tumorigenesis, metastasis and inflammatory factors of HCC cells, and promoted cell autophagy and apoptosis. Mechanistically, TET1 activated miR-34a by demethylating miR-34a. BTB domain and CNC homology 1 (BACH1) was identified as the target gene of miR-34a. Notably, Downregulation of miR-34a increased cellular inflammatory factors and decreased autophagy in the presence of TET1, while declines in BACH1 suppressed cellular inflammatory factors and enhanced autophagy in the presence of miR-34a inhibitor. BACH1 negatively regulated the p53 pathway. In conclusion, TET1 is a tumor suppressor in the progression of HCC by regulating the miR-34a/BACH1/p53 axis, and may contribute to the improvement of HCC prognosis and therapy.
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Affiliation(s)
- Xuehu Sun
- Department of Emergency Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230031, Anhui, PR China
| | - Hongmei Zhu
- Department of Emergency Surgery, the First Affiliated Hospital of Anhui Medical University, High-tech Hospital District, Hefei 230088, Anhui, PR China
| | - Rongge Cao
- Department of Emergency Surgery, the First Affiliated Hospital of University of Science and Technology of China, Hefei 230000, Anhui, PR China
| | - Jianlin Zhang
- Department of Emergency Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230031, Anhui, PR China
| | - Xingyu Wang
- Department of Emergency Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230031, Anhui, PR China.
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Liu Y, Song J, Liu Y, Zhou Z, Wang X. Transcription activation of circ-STAT3 induced by Gli2 promotes the progression of hepatoblastoma via acting as a sponge for miR-29a/b/c-3p to upregulate STAT3/Gli2. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2020; 39:101. [PMID: 32493490 PMCID: PMC7268652 DOI: 10.1186/s13046-020-01598-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 05/19/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND Hepatoblastoma (HB) is a common liver malignancy in children. Our previous study has disclosed the crucial role of STAT3 (signal transducer and activator of transcription 3) in HB. AIM OF THE STUDY Present study was designed to study the circular RNA (circRNA) STAT3 in HB. METHODS Gel electrophoresis revealed the circular characteristics of circ-STAT3. Function assays like EdU, transwell and sphere formation assay disclosed the function of circ-STAT3 in HB cells. Mechanism assays including ChIP, RIP, RNA pull down assay demonstrated the macular mechanism underlying circ-STAT3. RESULTS Circ_0043800, which was originated from STAT3, was up-regulated in HB tissues and cells. More importantly, silencing of circ-STAT3 led to the inhibition on HB cell growth, migration and stem-cell characteristics. Circ_0043800 was predominantly located in the cytoplasm of HB cells. Then, circ_0043800 was found to up-regulate STAT3 via sponging miR-29a/b/c-3p. Besides, we identified that STAT3 overexpression partially rescued silenced circ_0043800, while miR-29a/b/c-3p inhibition completely rescued silenced circ_0043800 on HB cellular biological behaviors. Subsequently, Gli2 (GLI family zinc finger 2) was identified as another target of miR-29a/b/c-3p. Circ_0043800 served as a competing endogenous RNA (ceRNA) to up-regulate both Gli2 and STAT3 via sponging miR-29a/b/c-3p. Moreover, we figured out that Gli2 overexpression completely rescued silenced circ_0043800 on HB cell malignant behaviors. After that, we discovered that Gli2 transcriptionally activated circ_0043800. The in-vivo assays further revealed that circ_0043800 promoted HB tumor growth by up-regulation of Gli2 and STAT3. CONCLUSION Gli2-induced circ_0043800 served as the ceRNA to promote HB by up-regulation of STAT3 and Gli2 at a miR-29a/b/c-3p dependent manner.
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Affiliation(s)
- Yanfeng Liu
- Department of Hepatobiliary Surgery, Qilu Hospital of Shandong University, No.107 Wenhuaxi Road, Jinan, 250012, Shandong Province, China
| | - Jianping Song
- Department of Hepatobiliary Surgery, Qilu Hospital of Shandong University, No.107 Wenhuaxi Road, Jinan, 250012, Shandong Province, China
| | - Yu Liu
- Department of General Surgery, 96602 Military Hospital, No.462 Chuanjin Road, Kunming, 650224, Yunnan Province, China
| | - Zhipeng Zhou
- Second Department of Hepatobiliary Surgery, PLA General Hospital, No.28 Fuxing Road, Haidian District, Beijing, 100853, China.
| | - Xianqiang Wang
- Department of Pediatric Surgery, PLA General Hospital, No.28 Fuxing Road, Haidian District, Beijing, 100853, China.
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Song S, Sun K, Dong J, Zhao Y, Liu F, Liu H, Sha Z, Mao J, Ding G, Guo W, Fu Z. microRNA-29a regulates liver tumor-initiating cells expansion via Bcl-2 pathway. Exp Cell Res 2019; 387:111781. [PMID: 31857112 DOI: 10.1016/j.yexcr.2019.111781] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 12/12/2019] [Accepted: 12/13/2019] [Indexed: 12/26/2022]
Abstract
MicroRNAs (miRNAs) participate in tumorigenesis, progression, recurrence and drug resistance of hepatocellular carcinoma (HCC). However, few miRNAs have been identified and entered clinical practice. Herein, we report that miR-29a is downregulated in tumor-initiating cells (T-ICs) and has an important function in liver T-ICs. Functional studies revealed that miR-29a knockdown promotes liver T-ICs self-renewal and tumorigenesis. Conversely, a forced miR-29a expression inhibits liver T-ICs self-renewal and tumorigenesis. Mechanistically, we find that miR-29a downregulates Bcl-2 via binding its mRNA 3'UTR in liver T-ICs. The correlation between miR-29a and Bcl-2 is validated in human HCC tissues. Furthermore, the miR-29a expression determines the responses of hepatoma cells to sorafenib treatment. Analysis of patient-derived xenografts (PDXs) further demonstrated that the miR-29a high patients are more sensitive to sorafenib treatment. In conclusion, our findings revealed the crucial role of the miR-29a in liver T-ICs expansion and sorafenib response, rendering miR-29a as an optimal target for the prevention and intervention of HCC.
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Affiliation(s)
- Shaohua Song
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai, 200003, China
| | - Keyan Sun
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai, 200003, China
| | - Junfeng Dong
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai, 200003, China
| | - Yuanyu Zhao
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai, 200003, China
| | - Fang Liu
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai, 200003, China
| | - Hao Liu
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai, 200003, China
| | - Zhilin Sha
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai, 200003, China
| | - Jiaxi Mao
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai, 200003, China
| | - Guoshan Ding
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai, 200003, China
| | - Wenyuan Guo
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai, 200003, China.
| | - Zhiren Fu
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai, 200003, China.
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Klieser E, Mayr C, Kiesslich T, Wissniowski T, Fazio PD, Neureiter D, Ocker M. The Crosstalk of miRNA and Oxidative Stress in the Liver: From Physiology to Pathology and Clinical Implications. Int J Mol Sci 2019; 20:ijms20215266. [PMID: 31652839 PMCID: PMC6862076 DOI: 10.3390/ijms20215266] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 10/14/2019] [Accepted: 10/21/2019] [Indexed: 02/07/2023] Open
Abstract
The liver is the central metabolic organ of mammals. In humans, most diseases of the liver are primarily caused by an unhealthy lifestyle-high fat diet, drug and alcohol consumption- or due to infections and exposure to toxic substances like aflatoxin or other environmental factors. All these noxae cause changes in the metabolism of functional cells in the liver. In this literature review we focus on the changes at the miRNA level, the formation and impact of reactive oxygen species and the crosstalk between those factors. Both, miRNAs and oxidative stress are involved in the multifactorial development and progression of acute and chronic liver diseases, as well as in viral hepatitis and carcinogenesis, by influencing numerous signaling and metabolic pathways. Furthermore, expression patterns of miRNAs and antioxidants can be used for biomonitoring the course of disease and show potential to serve as possible therapeutic targets.
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Affiliation(s)
- Eckhard Klieser
- Institute of Pathology, Paracelsus Medical University/Salzburger Landeskliniken (SALK), 5020 Salzburg, Austria.
- Cancer Cluster Salzburg, 5020 Salzburg, Austria.
| | - Christian Mayr
- Department of Internal Medicine I, Paracelsus Medical University/Salzburger Landeskliniken (SALK), 5020 Salzburg, Austria.
- Institute of Physiology and Pathophysiology, Paracelsus Medical University/Salzburger Landeskliniken (SALK), 5020 Salzburg, Austria.
| | - Tobias Kiesslich
- Department of Internal Medicine I, Paracelsus Medical University/Salzburger Landeskliniken (SALK), 5020 Salzburg, Austria.
- Institute of Physiology and Pathophysiology, Paracelsus Medical University/Salzburger Landeskliniken (SALK), 5020 Salzburg, Austria.
| | - Till Wissniowski
- Department of Gastroenterology and Endocrinology, Philipps University Marburg, 35043 Marburg, Germany.
| | - Pietro Di Fazio
- Department of Visceral, Thoracic and Vascular Surgery, Philipps University Marburg, 35043 Marburg, Germany.
| | - Daniel Neureiter
- Institute of Pathology, Paracelsus Medical University/Salzburger Landeskliniken (SALK), 5020 Salzburg, Austria.
- Cancer Cluster Salzburg, 5020 Salzburg, Austria.
| | - Matthias Ocker
- Translational Medicine Oncology, Bayer AG, 13353 Berlin, Germany.
- Department of Gastroenterology CBF, Charité University Medicine Berlin, 12200 Berlin, Germany.
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5
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Wang P, Yan Y, Yu W, Zhang H. Role of ten-eleven translocation proteins and 5-hydroxymethylcytosine in hepatocellular carcinoma. Cell Prolif 2019; 52:e12626. [PMID: 31033072 PMCID: PMC6668972 DOI: 10.1111/cpr.12626] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 03/26/2019] [Accepted: 04/03/2019] [Indexed: 12/13/2022] Open
Abstract
In mammals, methylation of the 5th position of cytosine (5mC) seems to be a major epigenetic modification of DNA. This process can be reversed (resulting in cytosine) with high efficiency by dioxygenases of the ten‐eleven translocation (TET) family, which perform oxidation of 5mC to 5‐hydroxymethylcytosine (5hmC), 5‐formylcytosine and 5‐carboxylcytosine. It has been demonstrated that these 5mC oxidation derivatives are in a dynamic state and have pivotal regulatory functions. Here, we comprehensively summarized the recent research progress in the understanding of the physiological functions of the TET proteins and their mechanisms of regulation of DNA methylation and transcription. Among the three TET genes, TET1 and TET2 expression levels have frequently been shown to be low in hepatocellular carcinoma (HCC) tissues and received most attention. The modulation of TET1 also correlates with microRNAs in a post‐transcriptional regulatory process. Additionally, recent studies revealed that global genomic 5hmC levels are down‐regulated in HCC tissues and cell lines. Combined with the reported results, identification of 5hmC signatures in HCC tissues and in circulating cell‐free DNA will certainly contribute to early detection and should help to design therapeutic strategies against HCC. 5hmC might also be a novel prognostic biomarker of HCC. Thus, a detailed understanding of the molecular mechanisms resulting in the premalignant and aggressive transformation of TET proteins and cells with 5hmC disruption might help to develop novel epigenetic therapies for HCC.
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Affiliation(s)
- Penghui Wang
- Department of General Surgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yunmeng Yan
- Key Clinical Laboratory of Henan Province, Department of Clinical Laboratory, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Wei Yu
- Department of General Surgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Hongyi Zhang
- Department of General Surgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
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7
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Deng M, Zeng C, Lu X, He X, Zhang R, Qiu Q, Zheng G, Jia X, Liu H, He Z. miR-218 suppresses gastric cancer cell cycle progression through the CDK6/Cyclin D1/E2F1 axis in a feedback loop. Cancer Lett 2017. [PMID: 28634044 DOI: 10.1016/j.canlet.2017.06.006] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Studies in several cancers have suggested that miR-218 has anti-tumor activities, but its function is yet to be elucidated. In this study, we investigated the regulation and function of miR-218 (miR-218-5p) in the cell cycle progression of gastric cancer (GC). We found that miR-218 could suppress proliferation of gastric cancer cells, induce cell cycle arrest at the G1 phase and inhibit tumor growth and metastasis in vivo. We also demonstrated that miR-218 specifically targeted the 3'-UTR regions of CDK6 and cyclin D1 and inhibited the expression of these molecules, which in turn repressed the pRb/E2F1 signaling pathway. Overexpression of CDK6 and Cyclin D1 reversed miR-218-mediated inhibition of pRB/E2F1 signaling and attenuated the miR-218-induced cell cycle arrest. More importantly, miR-218 expression was significantly reduced and inversely correlated with the levels of CDK6 and Cyclin D1 in gastric cancer tissues. Decreased miR-218 expression was also correlated with advanced clinical stage, lymph node metastasis, and poor prognosis in gastric cancer patients. Furthermore, we showed that miR-218 expression was directly activated by E2F1 through the transactivation of miR-218 host genes, SLIT2 and SLIT3, revealing a negative feedback regulation of miR-218 expression. Taken together, our results describe a regulatory loop miR-218-CDK6/CyclinD1-E2F1 whose disruption may contribute to cell cycle progression in gastric cancer and indicate the potential application of miR-218 in cancer therapy.
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Affiliation(s)
- Min Deng
- Cancer Hospital and Cancer Research Institute, Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Chao Zeng
- Department of Pathology, Guangdong Medical University, Dongguan, Guangdong Province, China
| | - Xihong Lu
- Guangzhou Eighth People's Hospital, Guangzhou, Guangdong Province, China
| | - Xiusheng He
- Cancer Research Institute, University of South China, Hengyang, Hunan Province, China
| | - Ruixin Zhang
- Cancer Hospital and Cancer Research Institute, Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Qinwei Qiu
- Cancer Hospital and Cancer Research Institute, Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Guopei Zheng
- Cancer Hospital and Cancer Research Institute, Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Xiaoting Jia
- Cancer Hospital and Cancer Research Institute, Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Hao Liu
- Cancer Hospital and Cancer Research Institute, Guangzhou Medical University, Guangzhou, Guangdong Province, China.
| | - Zhimin He
- Cancer Hospital and Cancer Research Institute, Guangzhou Medical University, Guangzhou, Guangdong Province, China.
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8
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Tian YP, Zhu YM, Sun XH, Lai MD. Multiple Functions of Ten-eleven Translocation 1 during Tumorigenesis. Chin Med J (Engl) 2017; 129:1744-51. [PMID: 27411465 PMCID: PMC4960967 DOI: 10.4103/0366-6999.185873] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Objective: Aberrant expression of ten-eleven translocation 1 (TET1) plays a critical role in tumor development and progression. We systematically summarized the latest research progress on the role and mechanisms of TET1 in cancer biology. Data Sources: Relevant articles published in English from 1980 to April 2016 were selected from the PubMed database. The terms “ten-eleven translocation 1,” “5mC,” “5hmC,” “microRNA,” “hypoxia,” and “embryonic stem cell” were used for the search. Study Selection: Articles focusing on the role and mechanism of TET1 in tumor were reviewed, including clinical and basic research articles. Results: TET proteins, the key enzymes converting 5-methylcytosine to 5-hydroxymethylcytosine, play vital roles in DNA demethylation regulation. Recent studies have shown that loss of TET1 is associated with tumorigenesis and can be used as a potential biomarker for cancer therapy, which indicates that TET1 serves as tumor suppressor gene. Moreover, besides its dioxygenase activity, TET1 could induce epithelial-mesenchymal transition and act as a coactivator to regulate gene transcription, such as developmental regulator in embryonic stem cells (ESCs) and hypoxia-responsive gene in cancer. The regulation of TET1 is also correlated with microRNA in a posttranscriptional modification process. Hence, it is complex but critical to comprehend the mechanisms of TET1 in the biology of ESCs and cancer. Conclusions: TET1 not only serves as a demethylation enzyme but also plays multiple roles during tumorigenesis and progression. More studies should be carried out to elucidate the exact mechanisms of TET1 and its associations with cancer before considering it as a therapeutic tool.
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Affiliation(s)
- Yi-Ping Tian
- Department of Pathology, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058; Key Laboratory of Disease Proteomics of Zhejiang Province, School of Basic Medical Sciences, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Yi-Min Zhu
- Department of Epidemiology and Biostatistics, Zhejiang University School of Public Health, Hangzhou, Zhejiang 310058, China
| | - Xiao-Hui Sun
- Department of Epidemiology and Biostatistics, Zhejiang University School of Public Health, Hangzhou, Zhejiang 310058, China
| | - Mao-De Lai
- Department of Pathology, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058; Key Laboratory of Disease Proteomics of Zhejiang Province, School of Basic Medical Sciences, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
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