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Yang D, Yang D, He Y, Liu J, Song Y, Zhou Y, Jiang L, Zeng X, Xu X, Xu H, Li J, Dan H. MRTF-A/SRF signaling suppresses invasion of oral squamous cell carcinoma. Oral Dis 2024; 30:1919-1934. [PMID: 37154247 DOI: 10.1111/odi.14611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 04/14/2023] [Accepted: 04/22/2023] [Indexed: 05/10/2023]
Abstract
BACKGROUND Serum response factor (SRF) and myocardial-associated transcription factor-A (MRTF-A) had different regulatory effects on the tumorigenesis and development in different cancers. However, the role of MRTF-A/SRF in oral squamous cell carcinoma (OSCC) remains to be determined. METHODS CCK-8 assay, cell scratch experiment, and transwell invasion assay were conducted to investigate the effects of MRTF-A/SRF on biological behavior of OSCC cells. The expression pattern and prognostic value of MRTF-A/SRF in OSCC were analyzed based on cBioPortal website and TCGA database. Protein-protein interaction network was visualized to identify protein functions. Go and KEGG pathway analyses were performed to investigate related pathways. The effect of MRTF-A/SRF on epithelial-mesenchymal transformation (EMT) of OSCC cells was explored by western blot assay. RESULTS Overexpression of MRTF-A/SRF inhibited the proliferation, migration, and invasion of OSCC cells in vitro. High expression of SRF was related to better prognosis of OSCC patients on hard palate, alveolar ridge, and oral tongue. Besides, overexpression of MRTF-A/SRF inhibited the EMT of OSCC cells. CONCLUSION SRF was closely related to the prognosis of OSCC. High expression of SRF and its co-activator MRTF-A inhibited proliferation, migration, and invasion of OSCC cells in vitro, possibly via EMT suppression.
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Affiliation(s)
- Dan Yang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Dan Yang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yuqing He
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jiaxin Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yansong Song
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yu Zhou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Lu Jiang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xin Zeng
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xiaoping Xu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Hao Xu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jing Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Hongxia Dan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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2
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Li JP, Liao XH, Xiang Y, Yao A, Fan LJ, Li H, Zhang ZJ, Huang F, Dai ZT, Zhang TC. MKL1/miR34a/FOXP3 axis regulates cell proliferation in gastric cancer. J Cell Biochem 2019; 120:7814-7824. [PMID: 30426547 DOI: 10.1002/jcb.28056] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 10/22/2018] [Indexed: 01/24/2023]
Abstract
Megakaryoblastic leukemia 1 (MKL1) was closely related to the pathogenesis of various human malignant cancers. MiR34a was reported to be closely related to cancer cell proliferation. Forkhead box protein 3 (FOXP3) was a transcription factor that played a different role in different cancer types. CDK6 was involved in cell cycle progression and was upregulated in several types of cancers. The present study investigated the effects of MKL1/miR34a/FOXP3 axis on cell proliferation in MGC803 gastric cancer cells. Our results demonstrated that overexpression of MKL1 promoted proliferation of MGC80-3 cells, MKL1 directly binding to the promoter of CDK6 to increase its expression. Knockdown of FOXP3 promoted proliferation of MGC80-3 cells and MKL1 inhibited the expression of FOXP3 via miR-34a. The finding can contribute to elucidating the regulatory mechanism involved in the cell cycle progression of gastric cancer cells and may aid in screening potential gene targets for the biological therapy of gastric cancer.
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Affiliation(s)
- Jia-Peng Li
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Hubei, China
| | - Xing-Hua Liao
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Hubei, China
| | - Yuan Xiang
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Hubei, China
| | - Ao Yao
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Hubei, China
| | - Li-Juan Fan
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Hubei, China
| | - Hui Li
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Hubei, China
| | - Zi-Jian Zhang
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Hubei, China
| | - Feng Huang
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Hubei, China
| | - Zhou-Tong Dai
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Hubei, China
| | - Tong-Cun Zhang
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Hubei, China.,Key Laboratory of Industrial Fermentation Microbiology, Minwastry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
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3
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Xu Y, Luo Y, Liang C, Xing W, Zhang T. A regulation loop between Nrf1α and MRTF-A controls migration and invasion in MDA-MB-231 breast cancer cells. Int J Mol Med 2018; 42:2459-2468. [PMID: 30106093 PMCID: PMC6192731 DOI: 10.3892/ijmm.2018.3816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Accepted: 08/16/2018] [Indexed: 01/06/2023] Open
Abstract
As a strong transactivator of promoters containing CarG boxes, myocardin-related transcription factor A (MRTF-A) is critical for the process of metastasis in tumor cells. Nuclear factor erythroid 2-like 1 (Nrf1) is well known as an important regulator of oxidative stress, which exists in multiple splicing forms with many unknown functions. The present study demonstrated a novel regulation loop between Nrf1α (the longest splicing form of Nrf1) and MRTF-A that regulated the migration and invasion of breast cancer MDA-MB-231 cells. The underlying mechanism of this regulation look was further investigated. In particular, Nrf1α inhibited migration and invasion of breast cancer cells through inhibiting the expression of MRTF-A via miR-219. The current results revealed that miR-219 could bind to the MRTF-A 3′-UTR to directly regulate its expression. However, MRTF-A could reverse activate the Nrf1α expression through binding to the CarG box in the Nrf1α promoter. It can be speculated that this regulation loop may be a homeostasis mechanism in cells against tumorigenesis.
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Affiliation(s)
- Yao Xu
- Institute of Biology and Medicine, Wuhan University of Science and Technology, Wuhan, Hubei 430065, P.R. China
| | - Ying Luo
- Institute of Biology and Medicine, Wuhan University of Science and Technology, Wuhan, Hubei 430065, P.R. China
| | - Chen Liang
- Institute of Biology and Medicine, Wuhan University of Science and Technology, Wuhan, Hubei 430065, P.R. China
| | - Weibing Xing
- Institute of Biology and Medicine, Wuhan University of Science and Technology, Wuhan, Hubei 430065, P.R. China
| | - Tongcun Zhang
- Institute of Biology and Medicine, Wuhan University of Science and Technology, Wuhan, Hubei 430065, P.R. China
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Kishi T, Mayanagi T, Iwabuchi S, Akasaka T, Sobue K. Myocardin-related transcription factor A (MRTF-A) activity-dependent cell adhesion is correlated to focal adhesion kinase (FAK) activity. Oncotarget 2018; 7:72113-72130. [PMID: 27708220 PMCID: PMC5342149 DOI: 10.18632/oncotarget.12350] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 09/17/2016] [Indexed: 01/27/2023] Open
Abstract
The regulation of cell-substrate adhesion is tightly linked to the malignant phenotype of tumor cells and plays a role in their migration, invasion, and metastasis. Focal adhesions (FAs) are dynamic adhesion structures that anchor the cell to the extracellular matrix. Myocardin-related transcription factors (MRTFs), co-regulators of the serum response factor (SRF), regulate expression of a set of genes encoding actin cytoskeletal/FA-related proteins. Here we demonstrated that the forced expression of a constitutively active MRTF-A (CA-MRTF-A) in B16F10 melanoma cells induced the up-regulation of actin cytoskeletal and FA proteins, resulting in FA reorganization and the suppression of cell migration. Expression of CA-MRTF-A markedly increased phosphorylation of focal adhesion kinase (FAK) and paxillin, which are important components for FA dynamics. Notably, FAK activation was triggered by the clustering of up-regulated integrins. Our results revealed that the MRTF-SRF-dependent regulation of cell migration requires both the up-regulation of actin cytoskeletal/FA proteins and the integrin-mediated regulation of FA components via the FAK/Src pathway. We also demonstrated that activation of the MRTF-dependent transcription correlates FAK activation in various tumor cells. The elucidation of the correlation between MRTF and FAK activities would be an effective therapeutic target in focus of tumor cell migration.
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Affiliation(s)
- Takayuki Kishi
- Department of Neuroscience, Institute for Biomedical Sciences, School of Medicine, Iwate Medical University, Yahaba 028-3694, Japan.,Department of Dermatology, School of Medicine, Iwate Medical University, Morioka 020-8505, Japan
| | - Taira Mayanagi
- Department of Neuroscience, Institute for Biomedical Sciences, School of Medicine, Iwate Medical University, Yahaba 028-3694, Japan
| | - Sadahiro Iwabuchi
- Department of Neuroscience, Institute for Biomedical Sciences, School of Medicine, Iwate Medical University, Yahaba 028-3694, Japan
| | - Toshihide Akasaka
- Department of Dermatology, School of Medicine, Iwate Medical University, Morioka 020-8505, Japan
| | - Kenji Sobue
- Department of Neuroscience, Institute for Biomedical Sciences, School of Medicine, Iwate Medical University, Yahaba 028-3694, Japan
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5
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Seifert A, Posern G. Tightly controlled MRTF-A activity regulates epithelial differentiation during formation of mammary acini. Breast Cancer Res 2017; 19:68. [PMID: 28592291 PMCID: PMC5463372 DOI: 10.1186/s13058-017-0860-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 05/25/2017] [Indexed: 01/06/2023] Open
Abstract
Background Myocardin-related transcription factors (MRTF) A and B link actin dynamics and mechanotransduction to gene expression. In mice, MRTF-A is involved in mammary gland differentiation, but its role in human mammary epithelial cells remains unclear. Methods Three-dimensional cultures of human mammary epithelial MCF10A cells were used to model acinar morphogenesis. Stable MRTF-A knockdown, MRTF-A/B rescue and MRTF-A/B overexpression was established to characterize the functional role during morphogenesis using confocal microscopy and expression analysis. Breast cancer patient databases were analyzed for MRTF-A expression. Results We showed that a precise temporal control of MRTFs is required for normal morphogenesis of MCF10A mammary acini. MRTF transcriptional activity, but not their protein amounts, is transiently induced during 3D acini formation. MRTF-A knockdown dramatically reduces acini size and prevents lumen formation. These effects are rescued by re-expression of MRTF-A, and partially by MRTF-B. Conversely, overexpression of MRTF-A and MRTF-B increases acini size, resulting in irregular spheroids without lumen and defective apico-basal polarity. These phenotypes correlate with deregulated expression of cell cycle inhibitors p21/Waf1, p27/Kip1 and altered phosphorylation of retinoblastoma protein. In MRTF overexpressing spheroids, proliferation and apoptosis are simultaneously increased at late stages, whilst neither occurs in control acini. MRTFs interfere with anoikis of the inner cells and cause an integrin switch from α6 to α5, repression of E-cadherin and induction of mesenchymal markers vimentin, Snai2 and Zeb1. Moreover, MRTF-overexpressing spheroids are insensitive to alteration in matrix stiffness. In two breast cancer cohorts, high expression of MRTF-A and known target genes was associated with decreased patient survival. Conclusion MRTF-A is required for proliferation and formation of mammary acini from luminal epithelial cells. Conversely, elevated MRTF activity results in pre-malignant spheroid formation due to defective proliferation, polarity loss and epithelial-mesenchymal transition. Electronic supplementary material The online version of this article (doi:10.1186/s13058-017-0860-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Anja Seifert
- Institute for Physiological Chemistry, Medical Faculty, Martin Luther University Halle-Wittenberg, 06114, Halle (Saale), Germany
| | - Guido Posern
- Institute for Physiological Chemistry, Medical Faculty, Martin Luther University Halle-Wittenberg, 06114, Halle (Saale), Germany.
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6
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Asparuhova MB, Secondini C, Rüegg C, Chiquet-Ehrismann R. Mechanism of irradiation-induced mammary cancer metastasis: A role for SAP-dependent Mkl1 signaling. Mol Oncol 2015; 9:1510-27. [PMID: 25999144 PMCID: PMC5528797 DOI: 10.1016/j.molonc.2015.04.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 03/19/2015] [Accepted: 04/11/2015] [Indexed: 12/18/2022] Open
Abstract
Radiotherapy is a standard treatment after conservative breast cancer surgery. However, cancers relapsing within a previously irradiated area have an increased probability to metastasize. The mechanisms responsible for this aggressiveness remain unclear. Here, we used the clinically relevant 4T1 breast cancer model mimicking aggressive local relapse after radiotherapy to identify differences between tumors grown in untreated versus preirradiated mammary glands. Tumors grown within preirradiated beds were highly enriched in transcripts encoding collagens and other proteins building or modifying the extracellular matrix, such as laminin‐332, tenascins, lysyl oxidases and matrix metalloproteinases. Type I collagen, known to directly contribute to tissue stiffening, and the pro‐metastatic megakaryoblastic leukemia‐1 (Mkl1) target gene tenascin‐C were further investigated. Mammary tissue preirradiation induced Mkl1 nuclear translocation in the tumor cells in vivo, indicating activation of Mkl1 signaling. Transcript profiling of cultured 4T1 cells revealed that the majority of the Mkl1 target genes, including tenascin‐C, required serum response factor (SRF) for their expression. However, application of dynamic strain or matrix stiffness to 4T1 cells converted the predominant SRF/Mkl1 action into SAP domain‐dependent Mkl1 signaling independent of SRF, accompanied by a switch to SAP‐dependent tumor cell migration. 4T1 tumors overexpressing intact Mkl1 became more metastatic within preirradiated beds, while tumors expressing Mkl1 lacking the SAP domain exhibited impaired growth and metastatic spread, and decreased Mkl1 target gene expression. Thus, we identified SAP‐dependent Mkl1 signaling as a previously unrecognized mediator of aggressive progression of mammary tumors locally relapsing after radiotherapy, and provide a novel signaling pathway for therapeutic intervention. Stroma irradiation results in tumors with increased extracellular matrix deposition. Irradiation induces Mkl1 nuclear translocation, tumor growth and lung metastases. Matrix stiffness and cyclic mechanical strain trigger SAP‐dependent Mkl1 signaling. Strain and irradiation induce SAP‐dependent cell migration and tumor progression. Radiation‐induced SAP‐dependent Mkl1 action: a new target for breast cancer therapy.
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Affiliation(s)
- Maria B Asparuhova
- Friedrich Miescher Institute for Biomedical Research, Affiliated with the Novartis Institutes for Biomedical Research and the University of Basel, Maulbeerstrasse 66, 4058 Basel, Switzerland.
| | - Chiara Secondini
- Department of Medicine, Faculty of Science, University of Fribourg, Rue Albert Gockel 1, 1700 Fribourg, Switzerland.
| | - Curzio Rüegg
- Department of Medicine, Faculty of Science, University of Fribourg, Rue Albert Gockel 1, 1700 Fribourg, Switzerland.
| | - Ruth Chiquet-Ehrismann
- Friedrich Miescher Institute for Biomedical Research, Affiliated with the Novartis Institutes for Biomedical Research and the University of Basel, Maulbeerstrasse 66, 4058 Basel, Switzerland; University of Basel, Faculty of Science, Basel, Switzerland.
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Cheng X, Yang Y, Fan Z, Yu L, Bai H, Zhou B, Wu X, Xu H, Fang M, Shen A, Chen Q, Xu Y. MKL1 potentiates lung cancer cell migration and invasion by epigenetically activating MMP9 transcription. Oncogene 2015; 34:5570-81. [PMID: 25746000 DOI: 10.1038/onc.2015.14] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 12/17/2014] [Accepted: 01/07/2015] [Indexed: 12/24/2022]
Abstract
Malignant tumors are exemplified by excessive proliferation and aggressive migration/invasion contributing to increased mortality of cancer patients. Matrix metalloproteinase 9 (MMP9) expression is positively correlated with lung cancer malignancy. The mechanism underlying an elevated MMP9 expression is not clearly defined. We demonstrate here that the transcriptional modulator megakaryocytic leukemia 1 (MKL1) was activated by hypoxia and transforming growth factor (TGF-β), two prominent pro-malignancy factors, in cultured lung cancer cells. MKL1 levels were also increased in more invasive types of lung cancer in humans. Depletion of MKL1 in lung cancer cells attenuated migration and invasion both in vitro and in vivo. Overexpression of MKL1 potentiated the induction of MMP9 transcription by hypoxia and TGF-β, whereas MKL1 silencing diminished MMP9 expression. Of interest, MKL1 knockdown eliminated histone H3K4 methylation surrounding the MMP9 promoter. Further analyses revealed that MKL1 recruited ASH2, a component of the H3K4 methyltransferase complex, to activate MMP9 transcription. Depletion of ASH2 ameliorated cancer cell migration and invasion in an MMP9-dependent manner. Together our data indicate that MKL1 potentiates lung cancer cell migration and invasion by epigenetically activating MMP9 transcription.
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Affiliation(s)
- X Cheng
- Key Laboratory of Cardiovascular Disease and Department of Pathophysiology, Nanjing Medical University, Nanjing, China.,Jiangsu Institute of Nuclear Medicine, Wuxi, China
| | - Y Yang
- Key Laboratory of Cardiovascular Disease and Department of Pathophysiology, Nanjing Medical University, Nanjing, China.,State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Z Fan
- Key Laboratory of Cardiovascular Disease and Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - L Yu
- Key Laboratory of Cardiovascular Disease and Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - H Bai
- Key Laboratory of Cardiovascular Disease and Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - B Zhou
- Key Laboratory of Cardiovascular Disease and Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - X Wu
- Key Laboratory of Cardiovascular Disease and Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - H Xu
- Key Laboratory of Cardiovascular Disease and Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - M Fang
- Key Laboratory of Cardiovascular Disease and Department of Pathophysiology, Nanjing Medical University, Nanjing, China.,Department of Nursing, Jiangsu Jiankang Vocational University, Nanjing, China
| | - A Shen
- Department of Key Laboratory of Inflammation and Molecular Targets, Medical College, Nantong University, Nantong, China
| | - Q Chen
- Key Laboratory of Cardiovascular Disease and Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Y Xu
- Key Laboratory of Cardiovascular Disease and Department of Pathophysiology, Nanjing Medical University, Nanjing, China
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Takeda H, Wei Z, Koso H, Rust AG, Yew CCK, Mann MB, Ward JM, Adams DJ, Copeland NG, Jenkins NA. Transposon mutagenesis identifies genes and evolutionary forces driving gastrointestinal tract tumor progression. Nat Genet 2015; 47:142-50. [PMID: 25559195 DOI: 10.1038/ng.3175] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Accepted: 12/04/2014] [Indexed: 12/14/2022]
Abstract
To provide a more comprehensive understanding of the genes and evolutionary forces driving colorectal cancer (CRC) progression, we performed Sleeping Beauty (SB) transposon mutagenesis screens in mice carrying sensitizing mutations in genes that act at different stages of tumor progression. This approach allowed us to identify a set of genes that appear to be highly relevant for CRC and to provide a better understanding of the evolutionary forces and systems properties of CRC. We also identified six genes driving malignant tumor progression and a new human CRC tumor-suppressor gene, ZNF292, that might also function in other types of cancer. Our comprehensive CRC data set provides a resource with which to develop new therapies for treating CRC.
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Affiliation(s)
- Haruna Takeda
- 1] Division of Genomics and Genetics, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore. [2] Department of Oncologic Pathology, School of Medicine, Kanazawa Medical University, Ishikawa, Japan
| | - Zhubo Wei
- Cancer Research Program, Houston Methodist Research Institute, Houston, Texas, USA
| | - Hideto Koso
- 1] Division of Genomics and Genetics, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore. [2] Division of Molecular and Developmental Biology, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Alistair G Rust
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, UK
| | - Christopher Chin Kuan Yew
- Division of Genomics and Genetics, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore
| | - Michael B Mann
- 1] Division of Genomics and Genetics, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore. [2] Cancer Research Program, Houston Methodist Research Institute, Houston, Texas, USA
| | - Jerrold M Ward
- Division of Genomics and Genetics, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore
| | - David J Adams
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, UK
| | - Neal G Copeland
- 1] Division of Genomics and Genetics, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore. [2] Cancer Research Program, Houston Methodist Research Institute, Houston, Texas, USA
| | - Nancy A Jenkins
- 1] Division of Genomics and Genetics, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore. [2] Cancer Research Program, Houston Methodist Research Institute, Houston, Texas, USA
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9
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MRTF-A and STAT3 synergistically promote breast cancer cell migration. Cell Signal 2014; 26:2370-80. [DOI: 10.1016/j.cellsig.2014.07.023] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Accepted: 07/14/2014] [Indexed: 01/06/2023]
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10
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SAP domain-dependent Mkl1 signaling stimulates proliferation and cell migration by induction of a distinct gene set indicative of poor prognosis in breast cancer patients. Mol Cancer 2014; 13:22. [PMID: 24495796 PMCID: PMC3933235 DOI: 10.1186/1476-4598-13-22] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Accepted: 01/30/2014] [Indexed: 12/12/2022] Open
Abstract
Background The main cause of death of breast cancer patients is not the primary tumor itself but the metastatic disease. Identifying breast cancer-specific signatures for metastasis and learning more about the nature of the genes involved in the metastatic process would 1) improve our understanding of the mechanisms of cancer progression and 2) reveal new therapeutic targets. Previous studies showed that the transcriptional regulator megakaryoblastic leukemia-1 (Mkl1) induces tenascin-C expression in normal and transformed mammary epithelial cells. Tenascin-C is known to be expressed in metastatic niches, is highly induced in cancer stroma and promotes breast cancer metastasis to the lung. Methods Using HC11 mammary epithelial cells overexpressing different Mkl1 constructs, we devised a subtractive transcript profiling screen to identify the mechanism by which Mkl1 induces a gene set co-regulated with tenascin-C. We performed computational analysis of the Mkl1 target genes and used cell biological experiments to confirm the effect of these gene products on cell behavior. To analyze whether this gene set is prognostic of accelerated cancer progression in human patients, we used the bioinformatics tool GOBO that allowed us to investigate a large breast tumor data set linked to patient data. Results We discovered a breast cancer-specific set of genes including tenascin-C, which is regulated by Mkl1 in a SAP domain-dependent, serum response factor-independent manner and is strongly implicated in cell proliferation, cell motility and cancer. Downregulation of this set of transcripts by overexpression of Mkl1 lacking the SAP domain inhibited cell growth and cell migration. Many of these genes are direct Mkl1 targets since their promoter-reporter constructs were induced by Mkl1 in a SAP domain-dependent manner. Transcripts, most strongly reduced in the absence of the SAP domain were mechanoresponsive. Finally, expression of this gene set is associated with high-proliferative poor-outcome classes in human breast cancer and a strongly reduced survival rate for patients independent of tumor grade. Conclusions This study highlights a crucial role for the transcriptional regulator Mkl1 and its SAP domain during breast cancer progression. We identified a novel gene set that correlates with bad prognosis and thus may help in deciding the rigor of therapy.
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11
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Zhang C, Luo X, Liu L, Guo S, Zhao W, Mu A, Liu Z, Wang N, Zhou H, Zhang T. Myocardin-related transcription factor A is up-regulated by 17β-estradiol and promotes migration of MCF-7 breast cancer cells via transactivation of MYL9 and CYR61. Acta Biochim Biophys Sin (Shanghai) 2013; 45:921-7. [PMID: 24084383 DOI: 10.1093/abbs/gmt104] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Many lines of evidence have suggested that estrogen plays important roles not only in the initiation and proliferation of breast cancer, but also in cancer metastasis. However, the mechanistic basis of the latter events is poorly understood. In addition, recent studies have suggested that myocardin-related transcription factor A (MRTF-A) might be related to cancer metastasis. However, as reports are contradictory, certain of its roles still remain confusing. In the present study, we showed that excessive 17β-estradiol could promote the migration of MCF-7 breast cancer cells and up-regulate the expression of MRTF-A, myosin regulatory light chain 9 (MYL9), and cysteine-rich angiogenic inducer 61 (CYR61). Overexpression of MRTF-A significantly promoted the migration of MCF-7 cells through its transactivation effects on MYL9 and CYR61 genes, while RNA interference-mediated knockdown of MRTF-A strongly inhibited transcription and expression of the target genes and reduced the migration ability of MCF-7 cells. These results provided novel evidence supporting the metastasis-promoting functions of MRTF-A, and implied that MRTF-A might be a switch for the estrogen pathway to change its proliferation-promoting roles into migration-stimulating roles in breast cancer.
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Affiliation(s)
- Chunling Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
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Luo XG, Zhang CL, Zhao WW, Liu ZP, Liu L, Mu A, Guo S, Wang N, Zhou H, Zhang TC. Histone methyltransferase SMYD3 promotes MRTF-A-mediated transactivation of MYL9 and migration of MCF-7 breast cancer cells. Cancer Lett 2013; 344:129-137. [PMID: 24189459 DOI: 10.1016/j.canlet.2013.10.026] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Revised: 10/20/2013] [Accepted: 10/24/2013] [Indexed: 01/06/2023]
Abstract
Myocardin-related transcription factor-A (MRTF-A) is a Rho signal-responsive transcriptional coactivator of serum response factor (SRF). Recent studies indicated that MRTF-A might be an important regulator of mammary gland and be involved in cancer metastasis. However, the roles of histone modification in the MRTF-A-dependent signal pathway and tumor migration are still not very clear. Here, we report that histone methylation is required for the MRTF-A-mediated upregulation of myosin regulatory light chain 9 (MYL9), an important cytoskeletal component which is implicated in cell migration. Furthermore, we demonstrate that SET and MYND domain containing protein 3 (SMYD3), a hitone methyltransferase (HMT) associated with carcinogenesis, might be the one which is responsible for the histone methylation occurred in the MRTF-A-mediated- transactivation of MYL9 and migration of breast cancer cells. Overexpression of SMYD3 promotes MRTF-A-mediated upregulation of MYL9 and migration of MCF-7 breast cancer cells, while contrary results were observed when the endogenous MRTF-A and SMYD3 were suppressed with specific siRNAs. In addition, the mutation analysis suggested that this cooperative transactivation is mainly mediated via the proximal binding element of MRTF-A in the promoter of MYL9, and the HMT activity of SMYD3 is required as well. Our findings reveal a new mechanism by which MRTF-A and SMYD3 functions in transcriptional regulation and cell migration, and provide a better understanding for metastasis of breast cancer.
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Affiliation(s)
- Xue-Gang Luo
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Industrial Microbiology, Tianjin 300457, China.
| | - Chun-Ling Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Industrial Microbiology, Tianjin 300457, China
| | - Wen-Wen Zhao
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Industrial Microbiology, Tianjin 300457, China
| | - Zhi-Peng Liu
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Industrial Microbiology, Tianjin 300457, China
| | - Lei Liu
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Industrial Microbiology, Tianjin 300457, China
| | - Ai Mu
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Industrial Microbiology, Tianjin 300457, China
| | - Shu Guo
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Industrial Microbiology, Tianjin 300457, China
| | - Nan Wang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Industrial Microbiology, Tianjin 300457, China
| | - Hao Zhou
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Industrial Microbiology, Tianjin 300457, China
| | - Tong-Cun Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China; Tianjin Key Laboratory of Industrial Microbiology, Tianjin 300457, China; School of Medicine, Wuhan University of Science and Technology, Wuhan 430081, China.
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13
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Morita T, Hayashi K. G-actin sequestering protein thymosin-β4 regulates the activity of myocardin-related transcription factor. Biochem Biophys Res Commun 2013; 437:331-5. [DOI: 10.1016/j.bbrc.2013.06.069] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 06/19/2013] [Indexed: 01/06/2023]
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Hayashi K, Morita T. Importance of dimer formation of myocardin family members in the regulation of their nuclear export. Cell Struct Funct 2013; 38:123-34. [PMID: 23594864 DOI: 10.1247/csf.13001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Myocardin (Mycd) family members function as a transcriptional cofactor for serum response factor (SRF). Dimer formation is necessary to exhibit their function, and the coiled-coil domain (CC) plays a critical role in their dimerization. We have recently revealed a detailed molecular mechanism for their Crm1 (exportin1)-mediated nuclear export. Here, we found other unique significances of the dimerization of Mycd family members. Introduction of mutations in the CC of myocardin-related transcription factor A (MRTF-A) and truncated Mycd resulted in significant decreases in their cytoplasmic localization and increases in their nuclear localization. In accordance with such subcellular localization changes, their binding to Crm1 were reduced. These results indicate that the dimerization of Mycd family members is necessary for their Crm1-mediated nuclear export. We have recently found that the N-terminal region of Mycd consisting of 128 amino acids (Mycd N128) self-associates to Mycd via the central basic domain (CB), resulting in masking the Crm1-binding site. Such self-association of MRTF-A would be unlikely. In this study, we also revealed that the dimerization of Mycd was also necessary for this self-association. Wild-type Mycd activated SRF-mediated transcription more potently than Mycd lacking the Mycd N128 (Mycd ΔN128) did. These results suggest two possible functions of the Mycd N128: 1) stabilization of Mycd dimer to enhance SRF-mediated transcription and 2) positive regulation of the transactivation ability of Mycd. These findings provide a new insight into the functional regulation of Mycd family members.
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Affiliation(s)
- Ken'ichiro Hayashi
- Department of Neuroscience, Osaka University Graduate School of Medicine, Japan.
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Leitner L, Shaposhnikov D, Mengel A, Descot A, Julien S, Hoffmann R, Posern G. MAL/MRTF-A controls migration of non-invasive cells by upregulation of cytoskeleton-associated proteins. J Cell Sci 2012; 124:4318-31. [PMID: 22223881 DOI: 10.1242/jcs.092791] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Monomeric actin regulates gene expression through serum response factor (SRF) by inhibiting its transcriptional coactivator myocardin-related transcription factor (MAL/MRTF). Many affected genes encode cytoskeletal components. We have analysed the migratory effects of actin-MAL signalling and of new target genes in non-invasive highly adherent cells. Expression of active MAL impaired migration of both fibroblasts and epithelial cells, whereas dominant-negative constructs and partial knockdown of MAL/MRTF enhanced motility. Knockdown of three newly characterised G-actin-regulated MAL targets, integrin α5, plakophilin 2 (Pkp2) and FHL1, enhanced cell migration. All three were upregulated by external stimulation through actin-MAL-SRF signalling, and MAL and SRF were inducibly recruited to cis-regulatory elements of the integrin α5 and Pkp2 genes. Finally, the reduced migration of epithelial cells stably expressing MAL was partially reversed by knockdown of Pkp2 and FHL1. We conclude that the actin-MAL pathway promotes adhesive gene expression, including integrin α5, Pkp2 and FHL1, and that this is anti-motile for non-invasive cells harbouring high basal activity.
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Affiliation(s)
- Laura Leitner
- AG Regulation of Gene Expression, Department of Molecular Biology, Max-Planck-Institute of Biochemistry, 82152 Martinsried, Germany
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Mayanagi T, Sobue K. Diversification of caldesmon-linked actin cytoskeleton in cell motility. Cell Adh Migr 2011; 5:150-9. [PMID: 21350330 DOI: 10.4161/cam.5.2.14398] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The actin cytoskeleton plays a key role in regulating cell motility. Caldesmon (CaD) is an actin-linked regulatory protein found in smooth muscle and non-muscle cells that is conserved among a variety of vertebrates. It binds and stabilizes actin filaments, as well as regulating actin-myosin interaction in a calcium (Ca2+)/calmodulin (CaM)- and/or phosphorylation-dependent manner. CaD function is regulated qualitatively by Ca2+/CaM and by its phosphorylation state and quantitatively at the mRNA level, by three different transcriptional regulation of the CALD1 gene. CaD has numerous functions in cell motility, such as migration, invasion, and proliferation, exerted via the reorganization of the actin cytoskeleton. Here we will outline recent findings regarding CaD's structural features and functions.
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Affiliation(s)
- Taira Mayanagi
- Department of Neuroscience, Osaka University Graduate School of Medicine, Osaka, Japan
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Scharenberg MA, Chiquet-Ehrismann R, Asparuhova MB. Megakaryoblastic leukemia protein-1 (MKL1): Increasing evidence for an involvement in cancer progression and metastasis. Int J Biochem Cell Biol 2010; 42:1911-4. [DOI: 10.1016/j.biocel.2010.08.014] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Revised: 08/23/2010] [Accepted: 08/24/2010] [Indexed: 12/13/2022]
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