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Lozano-Velasco E, Garcia-Padilla C, Carmona-Garcia M, Gonzalez-Diaz A, Arequipa-Rendon A, Aranega AE, Franco D. MEF2C Directly Interacts with Pre-miRNAs and Distinct RNPs to Post-Transcriptionally Regulate miR-23a-miR-27a-miR-24-2 microRNA Cluster Member Expression. Noncoding RNA 2024; 10:32. [PMID: 38804364 PMCID: PMC11130849 DOI: 10.3390/ncrna10030032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 05/11/2024] [Accepted: 05/15/2024] [Indexed: 05/29/2024] Open
Abstract
Transcriptional regulation constitutes a key step in gene expression regulation. Myocyte enhancer factor 2C (MEF2C) is a transcription factor of the MADS box family involved in the early development of several cell types, including muscle cells. Over the last decade, a novel layer of complexity modulating gene regulation has emerged as non-coding RNAs have been identified, impacting both transcriptional and post-transcriptional regulation. microRNAs represent the most studied and abundantly expressed subtype of small non-coding RNAs, and their functional roles have been widely documented. On the other hand, our knowledge of the transcriptional and post-transcriptional regulatory mechanisms that drive microRNA expression is still incipient. We recently demonstrated that MEF2C is able to transactivate the long, but not short, regulatory element upstream of the miR-23a-miR-27a-miR-24-2 transcriptional start site. However, MEF2C over-expression and silencing, respectively, displayed distinct effects on each of the miR-23a-miR-27a-miR-24-2 mature cluster members without affecting pri-miRNA expression levels, thus supporting additional MEF2C-driven regulatory mechanisms. Within this study, we demonstrated a complex post-transcriptional regulatory mechanism directed by MEF2C in the regulation of miR-23a-miR-27a-miR-24-2 cluster members, distinctly involving different domains of the MEF2C transcription factor and the physical interaction with pre-miRNAs and Ksrp, HnRNPa3 and Ddx17 transcripts.
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Affiliation(s)
- Estefanía Lozano-Velasco
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.C.-G.); (A.G.-D.); (A.A.-R.); (A.E.A.)
- Fundación Medina, 18016 Granada, Spain
| | - Carlos Garcia-Padilla
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.C.-G.); (A.G.-D.); (A.A.-R.); (A.E.A.)
- Department of Anatomy, Embryology and Zoology, School of Medicine, University of Extremadura, 06006 Badajoz, Spain
| | - Miguel Carmona-Garcia
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.C.-G.); (A.G.-D.); (A.A.-R.); (A.E.A.)
| | - Alba Gonzalez-Diaz
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.C.-G.); (A.G.-D.); (A.A.-R.); (A.E.A.)
| | - Angela Arequipa-Rendon
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.C.-G.); (A.G.-D.); (A.A.-R.); (A.E.A.)
| | - Amelia E. Aranega
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.C.-G.); (A.G.-D.); (A.A.-R.); (A.E.A.)
- Fundación Medina, 18016 Granada, Spain
| | - Diego Franco
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.C.-G.); (A.G.-D.); (A.A.-R.); (A.E.A.)
- Fundación Medina, 18016 Granada, Spain
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2
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Leavenworth JD, Yusuf N, Hassan Q. K-Homology Type Splicing Regulatory Protein: Mechanism of Action in Cancer and Immune Disorders. Crit Rev Eukaryot Gene Expr 2024; 34:75-87. [PMID: 37824394 PMCID: PMC11003564 DOI: 10.1615/critreveukaryotgeneexpr.2023048085] [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] [Indexed: 10/14/2023]
Abstract
K homology-type splicing regulatory protein (KSRP) is emerging as a key player in cancer biology, and immunology. As a single-strand nucleic acid binding protein it functions in both transcriptional and post-transcriptional regulation, while facilitating multiple stages of RNA metabolism to affect proliferation and control cell fate. However, it must interact with other proteins to determine the fate of its bound substrate. Here we provide an minireview of this important regulatory protein and describe its complex subcellular functions to affect RNA metabolism, stability, miRNA biogenesis and maturation, stress granule function, metastasis, and inflammatory processes.
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Affiliation(s)
- Jonathan D. Leavenworth
- Department of Oral and Maxillofacial Surgery, Institute of Oral Health Research, School of Dentistry, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Nabiha Yusuf
- Department of Dermatology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Quamarul Hassan
- Department of Oral and Maxillofacial Surgery, Institute of Oral Health Research, School of Dentistry, University of Alabama at Birmingham, Birmingham, AL, USA
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3
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Palzer KA, Bolduan V, Käfer R, Kleinert H, Bros M, Pautz A. The Role of KH-Type Splicing Regulatory Protein (KSRP) for Immune Functions and Tumorigenesis. Cells 2022; 11:cells11091482. [PMID: 35563788 PMCID: PMC9104899 DOI: 10.3390/cells11091482] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 04/21/2022] [Accepted: 04/26/2022] [Indexed: 12/11/2022] Open
Abstract
Post-transcriptional control of gene expression is one important mechanism that enables stringent and rapid modulation of cytokine, chemokines or growth factors expression, all relevant for immune or tumor cell function and communication. The RNA-binding protein KH-type splicing regulatory protein (KSRP) controls the mRNA stability of according genes by initiation of mRNA decay and inhibition of translation, and by enhancing the maturation of microRNAs. Therefore, KSRP plays a pivotal role in immune cell function and tumor progression. In this review, we summarize the current knowledge about KSRP with regard to the regulation of immunologically relevant targets, and the functional role of KSRP on immune responses and tumorigenesis. KSRP is involved in the control of myeloid hematopoiesis. Further, KSRP-mediated mRNA decay of pro-inflammatory factors is necessary to keep immune homeostasis. In case of infection, functional impairment of KSRP is important for the induction of robust immune responses. In this regard, KSRP seems to primarily dampen T helper cell 2 immune responses. In cancer, KSRP has often been associated with tumor growth and metastasis. In summary, aside of initiation of mRNA decay, the KSRP-mediated regulation of microRNA maturation seems to be especially important for its diverse biological functions, which warrants further in-depth examination.
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Affiliation(s)
- Kim-Alicia Palzer
- Department of Pharmacology, University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany; (K.-A.P.); (R.K.); (H.K.)
| | - Vanessa Bolduan
- Department of Dermatology, University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany; (V.B.); (M.B.)
| | - Rudolf Käfer
- Department of Pharmacology, University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany; (K.-A.P.); (R.K.); (H.K.)
| | - Hartmut Kleinert
- Department of Pharmacology, University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany; (K.-A.P.); (R.K.); (H.K.)
| | - Matthias Bros
- Department of Dermatology, University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany; (V.B.); (M.B.)
| | - Andrea Pautz
- Department of Pharmacology, University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany; (K.-A.P.); (R.K.); (H.K.)
- Correspondence: ; Tel.: +49-6131-179276; Fax: +49-6131-179042
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4
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mRNA Post-Transcriptional Regulation by AU-Rich Element-Binding Proteins in Liver Inflammation and Cancer. Int J Mol Sci 2020; 21:ijms21186648. [PMID: 32932781 PMCID: PMC7554771 DOI: 10.3390/ijms21186648] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/09/2020] [Accepted: 09/09/2020] [Indexed: 12/12/2022] Open
Abstract
AU-rich element-binding proteins (AUBPs) represent important post-transcriptional regulators of gene expression. AUBPs can bind to the AU-rich elements present in the 3'-UTR of more than 8% of all mRNAs and are thereby able to control the stability and/or translation of numerous target mRNAs. The regulation of the stability and the translation of mRNA transcripts by AUBPs are highly complex processes that occur through multiple mechanisms depending on the cell type and the cellular context. While AUBPs have been shown to be involved in inflammatory processes and the development of various cancers, their important role and function in the development of chronic metabolic and inflammatory fatty liver diseases (FLDs), as well as in the progression of these disorders toward cancers such as hepatocellular carcinoma (HCC), has recently started to emerge. Alterations of either the expression or activity of AUBPs are indeed significantly associated with FLDs and HCC, and accumulating evidence indicates that several AUBPs are deeply involved in a significant number of cellular processes governing hepatic metabolic disorders, inflammation, fibrosis, and carcinogenesis. Herein, we discuss our current knowledge of the roles and functions of AUBPs in liver diseases and cancer. The relevance of AUBPs as potential biomarkers for different stages of FLD and HCC, or as therapeutic targets for these diseases, are also highlighted.
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Wang S, Li M, Zhao X, Wang H, Zhu J, Wang C, Zhou M, Dong H, Zhou R. Upregulation of KSRP by miR-27b attenuates schistosomiasis-induced hepatic fibrosis by targeting TGF-β1. FASEB J 2020; 34:4120-4133. [PMID: 31953889 DOI: 10.1096/fj.201902438r] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/25/2019] [Accepted: 12/31/2019] [Indexed: 12/13/2022]
Abstract
Hepatic stellate cells (HSCs) are the main effectors for various types of hepatic fibrosis, including Schistosome-induced hepatic fibrosis. Multiple inflammatory cytokines/chemokines, such as transforming growth factor-β1 (TGF-β1), activate HSCs, and contribute to the development of hepatic fibrosis. MicroRNAs regulate gene expression at the posttranscriptional level and are involved in regulation of inflammatory cytokine/chemokine synthesis. In this study, we showed that soluble egg antigen (SEA) stimulation and Schistosoma japonicum infection downregulate miR-27b expression and increase KH-type splicing regulatory protein (KSRP) mRNA and protein levels in vitro and in vivo. miR-27b regulates the stabilization of TGF-β1 mRNA through targeting KSRP by interacting with their AU-rich elements in hepatocytes and non-parenchymal cells, which has an effect on the activation of HSCs. Importantly, our results have shown that either knockdown miR-27b or overexpression of KSRP attenuates S. japonicum-induced hepatic fibrosis in vivo. Therefore, our study highlights the crucial role of miR-27b and KSRP in the negative regulation of immune reactions in hepatocyte and non-parenchymal cells in response to SEA stimulation and S. japonicum infection. It reveals that manipulation of miR-27b or KSRP might be a useful strategy not only for treating Schistosome-induced hepatic fibrosis but also for curing hepatic fibrosis in general.
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Affiliation(s)
- Shuhong Wang
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Hubei, China.,Department of Medical Parasitology, School of Basic Medical Sciences, Wuhan University, Hubei, China
| | - Mingxuan Li
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Hubei, China.,Department of Medical Parasitology, School of Basic Medical Sciences, Wuhan University, Hubei, China
| | - Xuejun Zhao
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Hubei, China.,Department of Medical Parasitology, School of Basic Medical Sciences, Wuhan University, Hubei, China
| | - Huan Wang
- Department of Medical Parasitology, School of Basic Medical Sciences, Wuhan University, Hubei, China
| | - Jie Zhu
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Hubei, China.,Department of Medical Parasitology, School of Basic Medical Sciences, Wuhan University, Hubei, China
| | - Cheng Wang
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Hubei, China.,Department of Medical Parasitology, School of Basic Medical Sciences, Wuhan University, Hubei, China
| | - Mengsi Zhou
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Hubei, China.,Department of Medical Parasitology, School of Basic Medical Sciences, Wuhan University, Hubei, China
| | - Huifen Dong
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Hubei, China.,Department of Medical Parasitology, School of Basic Medical Sciences, Wuhan University, Hubei, China
| | - Rui Zhou
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Hubei, China.,Department of Medical Parasitology, School of Basic Medical Sciences, Wuhan University, Hubei, China
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6
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Caiazza F, Oficjalska K, Tosetto M, Phelan JJ, Noonan S, Martin P, Killick K, Breen L, O'Neill F, Nolan B, Furney S, Power R, Fennelly D, Craik CS, O'Sullivan J, Sheahan K, Doherty GA, Ryan EJ. KH-Type Splicing Regulatory Protein Controls Colorectal Cancer Cell Growth and Modulates the Tumor Microenvironment. THE AMERICAN JOURNAL OF PATHOLOGY 2019; 189:1916-1932. [PMID: 31404541 DOI: 10.1016/j.ajpath.2019.07.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 06/06/2019] [Accepted: 07/03/2019] [Indexed: 01/18/2023]
Abstract
KH-type splicing regulatory protein (KHSRP) is a multifunctional nucleic acid binding protein implicated in key aspects of cancer cell biology: inflammation and cell-fate determination. However, the role KHSRP plays in colorectal cancer (CRC) tumorigenesis remains largely unknown. Using a combination of in silico analysis of large data sets, ex vivo analysis of protein expression in patients, and mechanistic studies using in vitro models of CRC, we investigated the oncogenic role of KHSRP. We demonstrated KHSRP expression in the epithelial and stromal compartments of both primary and metastatic tumors. Elevated expression was found in tumor versus matched normal tissue, and these findings were validated in larger independent cohorts in silico. KHSRP expression was a prognostic indicator of worse overall survival (hazard ratio, 3.74; 95% CI, 1.43-22.97; P = 0.0138). Mechanistic data in CRC cell line models supported a role of KHSRP in driving epithelial cell proliferation in both a primary and metastatic setting, through control of the G1/S transition. In addition, KHSRP promoted a proangiogenic extracellular environment by regulating the secretion of oncogenic proteins involved in diverse cellular processes, such as migration and response to cellular stress. Our study provides novel mechanistic insight into the tumor-promoting effects of KHSRP in CRC.
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Affiliation(s)
- Francesco Caiazza
- Centre for Colorectal Disease, St. Vincent's University Hospital, Dublin, Ireland; Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, California.
| | - Katarzyna Oficjalska
- Centre for Colorectal Disease, St. Vincent's University Hospital, Dublin, Ireland; School of Medicine, University College Dublin, Dublin, Ireland
| | - Miriam Tosetto
- Centre for Colorectal Disease, St. Vincent's University Hospital, Dublin, Ireland
| | - James J Phelan
- Department of Surgery, Trinity Translational Medicine Institute, Trinity College Dublin, Dublin, Ireland
| | - Sinéad Noonan
- Centre for Colorectal Disease, St. Vincent's University Hospital, Dublin, Ireland
| | - Petra Martin
- Centre for Colorectal Disease, St. Vincent's University Hospital, Dublin, Ireland
| | - Kate Killick
- Systems Biology Ireland, University College Dublin, Dublin, Ireland
| | - Laura Breen
- National Institute for Cellular Biotechnology, Dublin City University, Dublin, Ireland
| | - Fiona O'Neill
- National Institute for Cellular Biotechnology, Dublin City University, Dublin, Ireland
| | - Blathnaid Nolan
- Centre for Colorectal Disease, St. Vincent's University Hospital, Dublin, Ireland
| | - Simon Furney
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Robert Power
- School of Medicine, University College Dublin, Dublin, Ireland
| | - David Fennelly
- Centre for Colorectal Disease, St. Vincent's University Hospital, Dublin, Ireland; School of Medicine, University College Dublin, Dublin, Ireland
| | - Charles S Craik
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, California
| | - Jacintha O'Sullivan
- Department of Surgery, Trinity Translational Medicine Institute, Trinity College Dublin, Dublin, Ireland
| | - Kieran Sheahan
- Centre for Colorectal Disease, St. Vincent's University Hospital, Dublin, Ireland; School of Medicine, University College Dublin, Dublin, Ireland
| | - Glen A Doherty
- Centre for Colorectal Disease, St. Vincent's University Hospital, Dublin, Ireland; School of Medicine, University College Dublin, Dublin, Ireland
| | - Elizabeth J Ryan
- Centre for Colorectal Disease, St. Vincent's University Hospital, Dublin, Ireland; School of Medicine, University College Dublin, Dublin, Ireland
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7
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Li S, Shen X, He S. Expression of toll-like receptors and their regulatory roles in murine cardiac telocytes. J Cell Mol Med 2019; 23:5360-5368. [PMID: 31232516 PMCID: PMC6653320 DOI: 10.1111/jcmm.14416] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 04/11/2019] [Accepted: 05/06/2019] [Indexed: 02/06/2023] Open
Abstract
Telocytes, newly discovered in the last decade, are interstitial cells found in numerous organs, with multiple proposed potential biological functions. Toll-like receptors (TLRs) play an important role in innate and adaptive immunity by recognizing pathogen-associated molecular patterns (PAMPs). However, it is still unknown whether telocytes express these innate receptors. We sought to determine the expression and role of TLRs in telocytes. In our study, we primarily detected TLR1-9 expression in telocytes. The proliferation, apoptosis and immunoregulatory activity of telocytes activated with or without TLR ligands were determined. Our results showed that purified telocytes expressed TLR2, TLR3 and TLR5. In particular, telocytes expressed high levels of TLR2 as observed using flow cytometry. When we stimulated telocytes with TLR2 or TLR3 agonists (Pam3CSK4, PolyI:C), iNOS expression was greatly increased after Pam3CSK4 treatment. Additionally, telocyte proliferation was reduced and cell apoptosis was increased after TLR agonist stimulation. A co-culture experiment showed that supernatant from telocytes pretreated with Pam3CSK4 inhibited T cell activation much more than that from untreated telocytes and this effect was mediated by iNOS. Overall, our results demonstrated TLR expression on telocytes for the first time and provided evidence of an immunoregulatory role of telocytes, indicating their clinical potential.
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Affiliation(s)
- Shinan Li
- Institute for Translation Medicine, Jinzhou Medical University, Jinzhou, China
| | - Xiaokun Shen
- Institute for Translation Medicine, Jinzhou Medical University, Jinzhou, China
| | - Shaoheng He
- Institute for Translation Medicine, Jinzhou Medical University, Jinzhou, China.,Allergy and Clinical Immunology Research Centre, the First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
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8
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Lu Y, Liu X, Xie M, Liu M, Ye M, Li M, Chen XM, Li X, Zhou R. The NF-κB-Responsive Long Noncoding RNA FIRRE Regulates Posttranscriptional Regulation of Inflammatory Gene Expression through Interacting with hnRNPU. THE JOURNAL OF IMMUNOLOGY 2017; 199:3571-3582. [PMID: 28993514 DOI: 10.4049/jimmunol.1700091] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 09/11/2017] [Indexed: 11/19/2022]
Abstract
Long noncoding RNAs, a newly identified class of noncoding RNAs, are important regulators of gene expression in innate immunity. We report in this study that the transcription of FIRRE, a conserved long noncoding RNA between humans and mice, is controlled by NF-κB signaling in macrophages and intestinal epithelial cells. Functionally, FIRRE appears to positively regulate the expression of several inflammatory genes in macrophages or intestinal epithelial cells in response to LPS stimulation via posttranscriptional mechanisms. Specifically, FIRRE physically interacts with heterogeneous nuclear ribonucleoproteins U, regulating the stability of mRNAs of selected inflammatory genes through targeting the AU-rich elements of their mRNAs in cells following LPS stimulation. Therefore, our data indicate a new regulatory role for NF-κB-responsive FIRRE in the posttranscriptional regulation of inflammatory genes in the innate immune system.
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Affiliation(s)
- Yajing Lu
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei 430071, China.,Department of Endocrinology, Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430077, China
| | - Xu Liu
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei 430071, China
| | - Minghong Xie
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei 430071, China
| | - Mingjia Liu
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei 430071, China
| | - Mengling Ye
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei 430071, China
| | - Mingxuan Li
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei 430071, China
| | - Xian-Ming Chen
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178; and
| | - Xiaoqing Li
- Center for Stem Cell Research and Application, Union Hospital, Tongji Medical School, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China
| | - Rui Zhou
- Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei 430071, China;
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9
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KSRP suppresses cell invasion and metastasis through miR-23a-mediated EGR3 mRNA degradation in non-small cell lung cancer. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2017; 1860:1013-1024. [PMID: 28847731 DOI: 10.1016/j.bbagrm.2017.08.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 08/10/2017] [Accepted: 08/18/2017] [Indexed: 02/07/2023]
Abstract
KH-type splicing regulatory protein (KSRP) is a single-strand RNA binding protein which regulates mRNA stability either by binding to AU-rich elements (AREs) of mRNA 3'UTR or by facilitating miRNA biogenesis to target mRNA. Unlike its well-characterized function at the molecular level in maintaining RNA homeostasis, the role of KSRP in cancer progression remains largely unknown. Here we investigate the role of KSRP in non-small cell lung cancer (NSCLC). We first examined KSRP expression by immunohistochemistry in a cohort containing 196 NSCLC patients and observed a strong positive correlation between KSRP expression and survival of NSCLC patients. Multivariate analysis further identified KSRP as an independent prognostic factor. Manipulating KSRP expression significantly affected in vitro cell mobility and in vivo metastatic ability of NSCLC cells. Microarray analysis identified an ARE-containing gene, EGR3, as a downstream effector of KSRP in NSCLC. Interestingly, we found that KSRP decreased EGR3 mRNA stability in an ARE-independent manner. By screening KSRP-regulated miRNAs in NSCLC cells, we further found that miR-23a directly binds to EGR3 3'UTR, reducing EGR3 expression and thereby inhibiting NSCLC cell mobility. Our findings implicate a targetable KSRP/miR-23a/EGR3 signaling axis in advanced tumor phenotypes.
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10
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Ding L, Ni J, Yang F, Huang L, Deng H, Wu Y, Ding X, Tang J. Promising therapeutic role of miR-27b in tumor. Tumour Biol 2017; 39:1010428317691657. [PMID: 28351320 DOI: 10.1177/1010428317691657] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
MicroRNAs are small nonprotein-encoding RNAs ranging from 18 to 25 nucleotides in size and regulate multiple biological pathways via directly targeting a variety of associated genes in cancers. MicroRNA-27b is a highly conserved MicroRNA throughout vertebrates and there are two homologs (hsa-miR-27a and hsa-miR-27b) in humans. MicroRNA-27b is an intragenic microRNA located on chromosome 9q22.1 within the C9orf3 gene, clustering with miR-23b and miR-24-1 in human. As a frequently dysregulated microRNA in human cancers, microRNA-27b could function as a tumor suppressor or an oncogenic microRNA. More and more studies indicate that microRNA-27b is involved in affecting various biological processes, such as angiogenesis, proliferation, metastasis, and drug resistance, and thus may act as a promising therapeutic target in human cancers. In this review, we discuss the role of microRNA-27b in detail and offer novel insights into molecular targeting therapy for cancers.
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Affiliation(s)
- Li Ding
- 1 School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, P.R. China.,2 Jiangsu Cancer Hospital Affiliated to Nanjing Medical University, Nanjing, P.R. China
| | - Jie Ni
- 2 Jiangsu Cancer Hospital Affiliated to Nanjing Medical University, Nanjing, P.R. China.,3 The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, P.R. China
| | - Fan Yang
- 2 Jiangsu Cancer Hospital Affiliated to Nanjing Medical University, Nanjing, P.R. China
| | - Lingli Huang
- 2 Jiangsu Cancer Hospital Affiliated to Nanjing Medical University, Nanjing, P.R. China
| | - Heng Deng
- 4 The Graduate School, AnHui University of Traditional Chinese Medicine, Hefei, P.R. China
| | - Yang Wu
- 2 Jiangsu Cancer Hospital Affiliated to Nanjing Medical University, Nanjing, P.R. China
| | - Xuansheng Ding
- 1 School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
| | - Jinhai Tang
- 2 Jiangsu Cancer Hospital Affiliated to Nanjing Medical University, Nanjing, P.R. China.,5 Department of General Surgery, The First Affiliated Hospital with Nanjing Medical University, Nanjing, P.R. China
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