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Zha J, Zhong M, Pan G, Chen Q, Jiang Y, Lai Q, Tan J, Zhou H, Wu H, Xu B. Stratification and therapeutic potential of ELL in cytogenetic normal acute myeloid leukemia. Gene 2023; 856:147110. [PMID: 36543308 DOI: 10.1016/j.gene.2022.147110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 11/25/2022] [Accepted: 12/06/2022] [Indexed: 12/23/2022]
Abstract
Optimizing prognostic stratification of patients with cytogenetic normal acute myeloid leukemia (CN-AML), a highly heterogeneous subgroup in AML, appears to be important to improve its treatment and clinical outcome. Here, we report a potential role of ELL, a gene associated with leukemogenesis in AML, in prognostic stratification of CN-AML patients. By analyzing public available databases, we found that ELL was highly expressed in AML patients compared with healthy donors. Kaplan-Meier analysis revealed that ELL expression markedly correlated with short overall survival (OS) of CN-AML patients. In COX multivariable regression analysis, higher ELL expression was an independent prognostic factor for OS in CN-AML. Knockdown of ELL by shRNAs sensitized KG-1α cells to anti-leukemic agents such as idarubicin (IDA) and chidamide (CS055), supporting its role in therapeutic response and outcome in AML. To understand its function in CN-AML, we further analyzed the ELL-driving gene signature. ELL-related genes were particularly enriched in cell adhesion molecules, cell differentiation, pathways in cancer, sequence-specific DNA binding, and extracellular matrix (ECM)-receptor interaction. Analysis of the PPI network identified 25 hub genes, including the stem cell gene BMP4. While BMP4 expression was significantly associated with ELL in CN-AML, knockdown of ELL markedly down-regulated BMP4 expression, suggesting that ELL might function via regulating BMP4 in AML. Together, these observations suggest a novel mechanism underlying pro-leukemogenic role of ELL via BMP4 up-regulation in AML and its potential value to serve as a predictive biomarker for therapeutic response and outcome of CN-AML patients.
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Affiliation(s)
- Jie Zha
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen 361003, China; Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen 361003, China
| | - Mengya Zhong
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen 361003, China; Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen 361003, China
| | - Guangchao Pan
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen 361003, China; Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen 361003, China
| | - Qinwei Chen
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen 361003, China; Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen 361003, China
| | - Yuelong Jiang
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen 361003, China; Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen 361003, China
| | - Qian Lai
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen 361003, China; Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen 361003, China
| | - Jinshui Tan
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen 361003, China; Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen 361003, China
| | - Hui Zhou
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen 361003, China; Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen 361003, China
| | - Hua Wu
- Department of Nuclear Medicine, the First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen 361003, China.
| | - Bing Xu
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen 361003, China; Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen 361003, China.
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Griesler B, Schuelke C, Uhlig C, Gadasheva Y, Grossmann C. Importance of Micromilieu for Pathophysiologic Mineralocorticoid Receptor Activity-When the Mineralocorticoid Receptor Resides in the Wrong Neighborhood. Int J Mol Sci 2022; 23:12592. [PMID: 36293446 PMCID: PMC9603863 DOI: 10.3390/ijms232012592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 10/06/2022] [Accepted: 10/14/2022] [Indexed: 11/17/2022] Open
Abstract
The mineralocorticoid receptor (MR) is a member of the steroid receptor family and acts as a ligand-dependent transcription factor. In addition to its classical effects on water and electrolyte balance, its involvement in the pathogenesis of cardiovascular and renal diseases has been the subject of research for several years. The molecular basis of the latter has not been fully elucidated, but an isolated increase in the concentration of the MR ligand aldosterone or MR expression does not suffice to explain long-term pathologic actions of the receptor. Several studies suggest that MR activity and signal transduction are modulated by the surrounding microenvironment, which therefore plays an important role in MR pathophysiological effects. Local changes in micromilieu, including hypoxia, ischemia/reperfusion, inflammation, radical stress, and aberrant salt or glucose concentrations affect MR activation and therefore may influence the probability of unphysiological MR actions. The surrounding micromilieu may modulate genomic MR activity either by causing changes in MR expression or MR activity; for example, by inducing posttranslational modifications of the MR or novel interaction with coregulators, DNA-binding sites, or non-classical pathways. This should be considered when developing treatment options and strategies for prevention of MR-associated diseases.
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Affiliation(s)
| | | | | | | | - Claudia Grossmann
- Julius-Bernstein-Institute of Physiology, Martin Luther University Halle-Wittenberg, 06112 Halle (Saale), Germany
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Panagopoulos I, Andersen K, Eilert-Olsen M, Rognlien AG, Munthe-Kaas MC, Micci F, Heim S. Rare KMT2A-ELL and Novel ZNF56-KMT2A Fusion Genes in Pediatric T-cell Acute Lymphoblastic Leukemia. Cancer Genomics Proteomics 2021; 18:121-131. [PMID: 33608309 DOI: 10.21873/cgp.20247] [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: 11/28/2020] [Revised: 01/20/2021] [Accepted: 01/25/2021] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND/AIM Previous reports have associated the KMT2A-ELL fusion gene, generated by t(11;19)(q23;p13.1), with acute myeloid leukemia (AML). We herein report a KMT2A-ELL and a novel ZNF56-KMT2A fusion genes in a pediatric T-lineage acute lymphoblastic leukemia (T-ALL). MATERIALS AND METHODS Genetic investigations were performed on bone marrow of a 13-year-old boy diagnosed with T-ALL. RESULTS A KMT2A-ELL and a novel ZNF56-KMT2A fusion genes were generated on der(11)t(11;19)(q23;p13.1) and der(19)t(11;19)(q23;p13.1), respectively. Exon 20 of KMT2A fused to exon 2 of ELL in KMT2A-ELL chimeric transcript whereas exon 1 of ZNF56 fused to exon 21 of KMT2A in ZNF56-KMT2A transcript. A literature search revealed four more T-ALL patients carrying a KMT2A-ELL fusion. All of them were males aged 11, 11, 17, and 20 years. CONCLUSION KMT2A-ELL fusion is a rare recurrent genetic event in T-ALL with uncertain prognostic implications. The frequency and impact of ZNF56-KMT2A in T-ALL are unknown.
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Affiliation(s)
- Ioannis Panagopoulos
- Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway;
| | - Kristin Andersen
- Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
| | - Martine Eilert-Olsen
- Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
| | - Anne Gro Rognlien
- Department of Pediatric Hematology and Oncology, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Monica Cheng Munthe-Kaas
- Department of Pediatric Hematology and Oncology, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Francesca Micci
- Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
| | - Sverre Heim
- Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.,Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
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Basu S, Nandy A, Biswas D. Keeping RNA polymerase II on the run: Functions of MLL fusion partners in transcriptional regulation. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2020; 1863:194563. [PMID: 32348849 DOI: 10.1016/j.bbagrm.2020.194563] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 01/13/2020] [Accepted: 04/13/2020] [Indexed: 12/21/2022]
Abstract
Since the identification of key MLL fusion partners as transcription elongation factors regulating expression of HOX cluster genes during hematopoiesis, extensive work from the last decade has resulted in significant progress in our overall mechanistic understanding of role of MLL fusion partner proteins in transcriptional regulation of diverse set of genes beyond just the HOX cluster. In this review, we are going to detail overall understanding of role of MLL fusion partner proteins in transcriptional regulation and thus provide mechanistic insights into possible MLL fusion protein-mediated transcriptional misregulation leading to aberrant hematopoiesis and leukemogenesis.
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Affiliation(s)
- Subham Basu
- Laboratory of Transcription Biology, Molecular Genetics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Kolkata 32, India
| | - Arijit Nandy
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Debabrata Biswas
- Laboratory of Transcription Biology, Molecular Genetics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Kolkata 32, India.
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Liu L, Chen L, Wu T, Qian H, Yang S. MicroRNA-30a-3p functions as a tumor suppressor in renal cell carcinoma by targeting WNT2. Am J Transl Res 2019; 11:4976-4983. [PMID: 31497214 PMCID: PMC6731429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 07/13/2019] [Indexed: 06/10/2023]
Abstract
The expression and function of microRNA (miR)-30a-3p in several types of human cancer have been explored. However, the biological function of miR-30a-3p in renal cell carcinoma (RCC) remains largely unknown. In this study, we demonstrate that expression of miR-30a-3p is down-regulated in RCC tissues compared to adjacent normal tissues. Furthermore, ectopic expression of miR-30a-3p significantly suppressed the proliferation, migration, and invasion of a human RCC cell line in vitro, while miR-30a-3p inhibited tumor growth in vivo as well. TargetScan software identified Wnt2 as a potential direct target of miR-30a-3p. To confirm this relationship, Wnt2 was ectopically expressed. The effects of miR-30a-3p on RCC cell proliferation and invasion were subsequently restored. Therefore, the results of this study support an anti-tumor role for miR-30a-3p in RCC progression which is potentially mediated via Wnt2.
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Affiliation(s)
- Lingqi Liu
- Department of Urology, Renmin Hospital of Wuhan University Wuhan 430060, Hubei, China
| | - Liang Chen
- Department of Urology, Renmin Hospital of Wuhan University Wuhan 430060, Hubei, China
| | - Tianpeng Wu
- Department of Urology, Renmin Hospital of Wuhan University Wuhan 430060, Hubei, China
| | - Huijun Qian
- Department of Urology, Renmin Hospital of Wuhan University Wuhan 430060, Hubei, China
| | - Sixing Yang
- Department of Urology, Renmin Hospital of Wuhan University Wuhan 430060, Hubei, China
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6
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Pascal LE, Masoodi KZ, Liu J, Qiu X, Song Q, Wang Y, Zang Y, Yang T, Wang Y, Rigatti LH, Chandran U, Colli LM, Vencio RZN, Lu Y, Zhang J, Wang Z. Conditional deletion of ELL2 induces murine prostate intraepithelial neoplasia. J Endocrinol 2017; 235:123-136. [PMID: 28870994 PMCID: PMC5679084 DOI: 10.1530/joe-17-0112] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 08/04/2017] [Indexed: 12/19/2022]
Abstract
Elongation factor, RNA polymerase II, 2 (ELL2) is an RNA Pol II elongation factor with functional properties similar to ELL that can interact with the prostate tumor suppressor EAF2. In the prostate, ELL2 is an androgen response gene that is upregulated in benign prostatic hyperplasia (BPH). We recently showed that ELL2 loss could enhance prostate cancer cell proliferation and migration, and that ELL2 gene expression was downregulated in high Gleason score prostate cancer specimens. Here, prostate-specific deletion of ELL2 in a mouse model revealed a potential role for ELL2 as a prostate tumor suppressor in vivoEll2-knockout mice exhibited prostatic defects including increased epithelial proliferation, vascularity and PIN lesions similar to the previously determined prostate phenotype in Eaf2-knockout mice. Microarray analysis of prostates from Ell2-knockout and wild-type mice on a C57BL/6J background at age 3 months and qPCR validation at 17 months of age revealed a number of differentially expressed genes associated with proliferation, cellular motility and epithelial and neural differentiation. OncoPrint analysis identified combined downregulation or deletion in prostate adenocarcinoma cases from the Cancer Genome Atlas (TCGA) data portal. These results suggest that ELL2 and its pathway genes likely play an important role in the development and progression of prostate cancer.
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Affiliation(s)
- Laura E Pascal
- Department of UrologyUniversity of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Khalid Z Masoodi
- Department of UrologyUniversity of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Transcriptomics LabDivision of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Shalimar, Srinagar, Jammu and Kashmir, India
| | - June Liu
- Department of UrologyUniversity of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Xiaonan Qiu
- Department of UrologyUniversity of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- School of MedicineTsinghua University, Beijing, China
| | - Qiong Song
- Department of UrologyUniversity of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Center for Translational MedicineGuangxi Medical University, Nanning, Guangxi, China
| | - Yujuan Wang
- Department of UrologyUniversity of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Yachen Zang
- Department of UrologyUniversity of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Department of UrologyThe Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Tiejun Yang
- Department of UrologyUniversity of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Department of UrologyHenan Cancer Hospital, Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, China
| | - Yao Wang
- Department of UrologyUniversity of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Department of UrologyChina-Japan Hospital of Jilin University, Changchun, Jilin, China
| | - Lora H Rigatti
- Division of Laboratory Animal ResourcesUniversity of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Uma Chandran
- Department of Biomedical InformaticsUniversity of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Leandro M Colli
- Ribeirao Preto Medical SchoolUniversity of São Paulo, Ribeirão Preto-SP, Brazil
| | - Ricardo Z N Vencio
- Department of Computing and Mathematics FFCLRP-USPUniversity of São Paulo, Ribeirão Preto, Brazil
| | - Yi Lu
- Key Laboratory of Longevity and Aging-related DiseasesMinistry of Education, China and Center for Translational Medicine Guangxi Medical University, Nanning, Guangxi, China
- Department of BiologySouthern University of Science and Technology School of Medicine, Shenzhen, Guangdong, China
| | - Jian Zhang
- Key Laboratory of Longevity and Aging-related DiseasesMinistry of Education, China and Center for Translational Medicine Guangxi Medical University, Nanning, Guangxi, China
- Department of BiologySouthern University of Science and Technology School of Medicine, Shenzhen, Guangdong, China
| | - Zhou Wang
- Department of UrologyUniversity of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- University of Pittsburgh Cancer InstituteUniversity of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Department of Pharmacology and Chemical BiologyUniversity of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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Liu L, Li Y, Liu S, Duan Q, Chen L, Wu T, Qian H, Yang S, Xin D. Downregulation of miR-193a-3p inhibits cell growth and migration in renal cell carcinoma by targeting PTEN. Tumour Biol 2017. [PMID: 28639901 DOI: 10.1177/1010428317711951] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Although miR-193a-3p has been found to be dysregulated in variety of human tumors, little is known about its role in renal cell carcinoma. This study was designed to investigate the function and underlying mechanism of miR-193a-3p in human renal cell carcinoma tissues and cell lines. Here, we demonstrated that the expression of miR-193-3p was increased in renal cell carcinoma tissues and cell lines. In addition, knockdown of miR-193a-3p significantly inhibited cell proliferation and colony formation and induced cells into G1 phase arrest. Meanwhile, the migration potential of 786-O cells was also decreased compared to control group. Furthermore, we identified PTEN as a direct and functional target of miR-193a-3p, at least partly responsible for promoting tumor effect of miR-193a-3p in renal cell carcinoma. Taken together, the findings indicated for the first time that miR-193a-3p functions as a tumor-promoting microRNA by directly targeting PTEN in renal cell carcinoma.
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Affiliation(s)
- Lingqi Liu
- 1 Department of Urology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yanqin Li
- 2 School of Pharmaceutical Sciences, Wuhan University, Wuhan, China
| | - Shuchao Liu
- 1 Department of Urology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Qixin Duan
- 1 Department of Urology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Liang Chen
- 1 Department of Urology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Tianpeng Wu
- 1 Department of Urology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Huijun Qian
- 1 Department of Urology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Sixing Yang
- 1 Department of Urology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Dianqi Xin
- 3 Department of Urology, Peking University First Hospital, Beijing, China
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8
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Liu L, Liu S, Duan Q, Chen L, Wu T, Qian H, Yang S, Xin D, He Z, Guo Y. MicroRNA-142-5p promotes cell growth and migration in renal cell carcinoma by targeting BTG3. Am J Transl Res 2017; 9:2394-2402. [PMID: 28559989 PMCID: PMC5446521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Accepted: 02/14/2017] [Indexed: 06/07/2023]
Abstract
PURPOSE Some microRNA (miRNA) levels have been found to be dysregulated in cancer patients, suggesting the potential usefulness of miRNAs in cancer therapies. The purpose of this study was to investigate the expression of miR-142-5p in human renal cell carcinoma (RCC) and its potential role in tumor growth and metastasis. METHODS The expression level of miR-142-5p in human RCC tissue and cell lines was determined by quantitative reverse transcription polymerase chain reaction analysis. MTT, colony formation, Transwell, and cell cycle assays were performed to explore the potential functions of miR-142-5p in human RCC cells. The potential target gene of miR-142-5p was identified and confirmed via luciferase reporter assays. RESULTS miR-142-5p expression was elevated in RCC tissues and cell lines. Overexpression of miR-142-5p significantly promoted cell proliferation and colony formation and could prevent G1 phase arrest among RCC 786-O cells. Meanwhile, the migration potential of 786-O cells was greater than that of control cells. BTG3 was identified as a direct target of miR-142-5p, and re-expression of BTG3 reversed the miR-142-5p-induced cell proliferation. CONCLUSION miR-142-5p promoted the proliferation and migration of RCC cells by targeting BTG3. With this potential onco-miRNA role in the progression of RCC, miR-142-5p may be a therapeutic target for the treatment of RCC.
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Affiliation(s)
- Lingqi Liu
- Department of Urology, Renmin Hospital of Wuhan UniversityWuhan 430060, China
| | - Shuchao Liu
- Department of Urology, Renmin Hospital of Wuhan UniversityWuhan 430060, China
| | - Qixin Duan
- Department of Urology, Renmin Hospital of Wuhan UniversityWuhan 430060, China
| | - Liang Chen
- Department of Urology, Renmin Hospital of Wuhan UniversityWuhan 430060, China
| | - Tianpeng Wu
- Department of Urology, Renmin Hospital of Wuhan UniversityWuhan 430060, China
| | - Huijun Qian
- Department of Urology, Renmin Hospital of Wuhan UniversityWuhan 430060, China
| | - Sixing Yang
- Department of Urology, Renmin Hospital of Wuhan UniversityWuhan 430060, China
| | - Dianqi Xin
- Department of Urology, Peking University, First HospitalBeijing 100034, China
| | - Zhisong He
- Department of Urology, Peking University, First HospitalBeijing 100034, China
| | - Yinglu Guo
- Department of Urology, Peking University, First HospitalBeijing 100034, China
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9
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Sharma N. Regulation of RNA polymerase II-mediated transcriptional elongation: Implications in human disease. IUBMB Life 2016; 68:709-16. [DOI: 10.1002/iub.1538] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 07/14/2016] [Indexed: 01/03/2023]
Affiliation(s)
- Nimisha Sharma
- University School of Biotechnology, G.G.S. Indraprastha University; Dwarka New Delhi 110078 India
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10
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Chen Y, Zhou C, Ji W, Mei Z, Hu B, Zhang W, Zhang D, Wang J, Liu X, Ouyang G, Zhou J, Xiao W. ELL targets c-Myc for proteasomal degradation and suppresses tumour growth. Nat Commun 2016; 7:11057. [PMID: 27009366 PMCID: PMC4820845 DOI: 10.1038/ncomms11057] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 02/16/2016] [Indexed: 12/17/2022] Open
Abstract
Increasing evidence supports that ELL (eleven-nineteen lysine-rich leukaemia) is a key regulator of transcriptional elongation, but the physiological function of Ell in mammals remains elusive. Here we show that ELL functions as an E3 ubiquitin ligase and targets c-Myc for proteasomal degradation. In addition, we identify that UbcH8 serves as a ubiquitin-conjugating enzyme in this pathway. Cysteine 595 of ELL is an active site of the enzyme; its mutation to alanine (C595A) renders the protein unable to promote the ubiquitination and degradation of c-Myc. ELL-mediated c-Myc degradation inhibits c-Myc-dependent transcriptional activity and cell proliferation, and also suppresses c-Myc-dependent xenograft tumour growth. In contrast, the ELL(C595A) mutant not only loses the ability to inhibit cell proliferation and xenograft tumour growth, but also promotes tumour metastasis. Thus, our work reveals a previously unrecognized function for ELL as an E3 ubiquitin ligase for c-Myc and a potential tumour suppressor.
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Affiliation(s)
- Yu Chen
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
| | - Chi Zhou
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
| | - Wei Ji
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
| | - Zhichao Mei
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
| | - Bo Hu
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
| | - Wei Zhang
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
| | - Dawei Zhang
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
| | - Jing Wang
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
| | - Xing Liu
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
| | - Gang Ouyang
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
| | - Jiangang Zhou
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
| | - Wuhan Xiao
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
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ELL inhibits E2F1 transcriptional activity by enhancing E2F1 deacetylation via recruitment of histone deacetylase 1. Mol Cell Biol 2013; 34:765-75. [PMID: 24344198 DOI: 10.1128/mcb.00878-13] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
ELL (eleven-nineteen lysine-rich leukemia protein) was first identified as a translocation partner of MLL in acute myeloid leukemia; however, the exact mechanism of its action has remained elusive. In this study, we identified ELL as a direct downstream target gene of E2F1. Coimmunoprecipitation assays showed that ELL interacted with E2F1 in vitro and in vivo, leading to inhibition of E2F1 transcriptional activity. In addition, ELL enhanced E2F1 deacetylation via recruitment of histone deacetylase 1 (HDAC1). Notably, the MLL-ELL fusion protein lost the inhibitory role of ELL in E2F1 transcriptional activity. Furthermore, DNA damage induced ELL in an E2F1-dependent manner and ELL protected cells against E2F1-dependent apoptosis. Our findings not only connect ELL to E2F1 function and uncover a novel role of ELL in response to DNA damage but also provide an insight into the mechanism for MLL-ELL-associated leukemogenesis.
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Arumemi F, Bayles I, Paul J, Milcarek C. Shared and discrete interacting partners of ELL1 and ELL2 by yeast two-hybrid assay. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/abb.2013.47101] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Cai L, Phong BL, Fisher AL, Wang Z. Regulation of fertility, survival, and cuticle collagen function by the Caenorhabditis elegans eaf-1 and ell-1 genes. J Biol Chem 2011; 286:35915-35921. [PMID: 21880729 DOI: 10.1074/jbc.m111.270454] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
EAF2, an androgen-regulated protein, interacts with members of the ELL (eleven-nineteen lysine-rich leukemia) transcription factor family and also acts as a tumor suppressor. Although these proteins control transcriptional elongation and perhaps modulate the effects of other transcription factors, the mechanisms of their actions remain largely unknown. To gain new insights into the biology of the EAF2 and ELL family proteins, we used Caenorhabditis elegans as a model to explore the in vivo roles of their worm orthologs. Through the use of transgenic worms, RNAi, and an eaf-1 mutant, we found that both genes are expressed in multiple cell types throughout the worm life cycle and that they play important roles in fertility, survival, and body size regulation. ELL-1 and EAF-1 likely contribute to these activities in part through modulating cuticle synthesis, given that we observed a disrupted cuticle structure in ell-1 RNAi-treated or eaf-1 mutant worms. Consistent with disruption of cuticle structure, loss of either ELL-1 or EAF-1 suppressed the rol phenotype of specific collagen mutants, possibly through the control of dpy-3, dpy-13, and sqt-3 collagen gene expression. Furthermore, we also noted the regulation of collagen expression by ELL overexpression in PC3 human prostate cancer cells. Together, these results reveal important roles for the eaf-1 and ell-1 genes in the regulation of extracellular matrix components.
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Affiliation(s)
- Liquan Cai
- Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania 15232
| | - Binh L Phong
- Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania 15232
| | - Alfred L Fisher
- Division of Geriatric Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15260.
| | - Zhou Wang
- Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania 15232.
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Heikkinen S, Väisänen S, Pehkonen P, Seuter S, Benes V, Carlberg C. Nuclear hormone 1α,25-dihydroxyvitamin D3 elicits a genome-wide shift in the locations of VDR chromatin occupancy. Nucleic Acids Res 2011; 39:9181-93. [PMID: 21846776 PMCID: PMC3241659 DOI: 10.1093/nar/gkr654] [Citation(s) in RCA: 183] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A global understanding of the actions of the nuclear hormone 1α,25-dihydroxyvitamin D3 (1α,25(OH)2D3) and its vitamin D receptor (VDR) requires a genome-wide analysis of VDR binding sites. In THP-1 human monocytic leukemia cells we identified by ChIP-seq 2340 VDR binding locations, of which 1171 and 520 occurred uniquely with and without 1α,25(OH)2D3 treatment, respectively, while 649 were common. De novo identified direct repeat spaced by 3 nucleotides (DR3)-type response elements (REs) were strongly associated with the ligand-responsiveness of VDR occupation. Only 20% of the VDR peaks diminishing most after ligand treatment have a DR3-type RE, in contrast to 90% for the most growing peaks. Ligand treatment revealed 638 1α,25(OH)2D3 target genes enriched in gene ontology categories associated with immunity and signaling. From the 408 upregulated genes, 72% showed VDR binding within 400 kb of their transcription start sites (TSSs), while this applied only for 43% of the 230 downregulated genes. The VDR loci showed considerable variation in gene regulatory scenarios ranging from a single VDR location near the target gene TSS to very complex clusters of multiple VDR locations and target genes. In conclusion, ligand binding shifts the locations of VDR occupation to DR3-type REs that surround its target genes and occur in a large variety of regulatory constellations.
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Affiliation(s)
- Sami Heikkinen
- Department of Biosciences, University of Eastern Finland, FIN-70210 Kuopio, Finland
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