101
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Abrantes JLF, Tornatore TF, Pelizzaro-Rocha KJ, de Jesus MB, Cartaxo RT, Milani R, Ferreira-Halder CV. Crosstalk between kinases, phosphatases and miRNAs in cancer. Biochimie 2014; 107 Pt B:167-87. [PMID: 25230087 DOI: 10.1016/j.biochi.2014.09.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 09/04/2014] [Indexed: 02/07/2023]
Abstract
Reversible phosphorylation of proteins, performed by kinases and phosphatases, is the major post translational protein modification in eukaryotic cells. This intracellular event represents a critical regulatory mechanism of several signaling pathways and can be related to a vast array of diseases, including cancer. Cancer research has produced increasing evidence that kinase and phosphatase activity can be compromised by mutations and also by miRNA silencing, performed by small non-coding and endogenously produced RNA molecules that lead to translational repression. miRNAs are believed to target about one-third of human mRNAs while a single miRNA may target about 200 transcripts simultaneously. Regulation of the phosphorylation balance by miRNAs has been a topic of intense research over the last years, spanning topics going as far as cancer aggressiveness and chemotherapy resistance. By addressing recent studies that have shown miRNA expression patterns as phenotypic signatures of cancers and how miRNA influence cellular processes such as apoptosis, cell cycle control, angiogenesis, inflammation and DNA repair, we discuss how kinases, phosphatases and miRNAs cooperatively act in cancer biology.
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Affiliation(s)
- Júlia L F Abrantes
- Department of Biochemistry, Institute of Biology, UNICAMP, 13083-970 Campinas, Brazil
| | - Thaís F Tornatore
- Department of Biochemistry, Institute of Biology, UNICAMP, 13083-970 Campinas, Brazil
| | | | - Marcelo B de Jesus
- Department of Biochemistry, Institute of Biology, UNICAMP, 13083-970 Campinas, Brazil
| | - Rodrigo T Cartaxo
- Department of Biochemistry, Institute of Biology, UNICAMP, 13083-970 Campinas, Brazil
| | - Renato Milani
- Department of Biochemistry, Institute of Biology, UNICAMP, 13083-970 Campinas, Brazil
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102
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Lehner B, Kunz P, Saehr H, Fellenberg J. Epigenetic silencing of genes and microRNAs within the imprinted Dlk1-Dio3 region at human chromosome 14.32 in giant cell tumor of bone. BMC Cancer 2014; 14:495. [PMID: 25005035 PMCID: PMC4101709 DOI: 10.1186/1471-2407-14-495] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Accepted: 07/04/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Growing evidence exists that the neoplastic stromal cell population (GCTSC) within giant cell tumors (GCT) originates from mesenchymal stem cells (MSC). In a previous study we identified a microRNA signature that differentiates between these cell types. Five differentially expressed microRNAs are located within the Dlk1-Dio3 region on chromosome 14. Aberrant regulation within this region is known to influence cell growth, differentiation and the development of cancer. The aim of this study was to elucidate the involvement of deregulations within the Dlk1-Dio3 region in GCT pathogenesis. METHODS Quantitative gene and microRNA expression analyses were performed on GCTSCs and MSCs with or without treatment with epigenetic modifiers. Methylation analysis of differentially methylated regions was performed by bisulfite sequencing. RESULTS In addition to microRNA silencing we detected a significant downregulation of Dlk1, Meg3 and Meg8 in GCTSCs compared to MSCs. DNA methylation analyses of the Meg3-DMR and IG-DMR revealed a frequent hypermethylation within the IG-DMR in GCTs. Epigenetic modification could restore expression of some but not all analyzed genes and microRNAs suggesting further regulatory mechanisms. CONCLUSION Epigenetic silencing of genes and microRNAs within the Dlk1-Dio3 region is a common event in GCTSCs, in part mediated by hypermethylation within the IG-DMR. The identified genes, micro RNAs and microRNA target genes might be valuable targets for the development of improved strategies for GCT diagnosis and therapy.
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Affiliation(s)
| | | | | | - Joerg Fellenberg
- Research Centre for Experimental Orthopedics, Department of Orthopedics, Trauma Surgery and Paraplegia, Orthopedic University Hospital Heidelberg, Schlierbacher Landstr 200a, Heidelberg 69118, Germany.
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103
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Singh B, Coffey RJ. From wavy hair to naked proteins: the role of transforming growth factor alpha in health and disease. Semin Cell Dev Biol 2014; 28:12-21. [PMID: 24631356 DOI: 10.1016/j.semcdb.2014.03.003] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Revised: 02/28/2014] [Accepted: 03/04/2014] [Indexed: 02/07/2023]
Abstract
Since its discovery in 1978 and cloning in 1984, transforming growth factor-alpha (TGF-α, TGFA) has been one of the most extensively studied EGF receptor (EGFR) ligands. In this review, we provide a historical perspective on TGFA-related studies, highlighting what we consider important advances related to its function in normal and disease states.
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Affiliation(s)
- Bhuminder Singh
- Departments of Medicine and Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
| | - Robert J Coffey
- Departments of Medicine and Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Department of Veteran Affairs Medical Center, Nashville, TN 37232, USA.
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104
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Korkmaz G, Tekirdag KA, Ozturk DG, Kosar A, Sezerman OU, Gozuacik D. MIR376A is a regulator of starvation-induced autophagy. PLoS One 2013; 8:e82556. [PMID: 24358205 PMCID: PMC3864973 DOI: 10.1371/journal.pone.0082556] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 10/29/2013] [Indexed: 01/07/2023] Open
Abstract
Background Autophagy is a vesicular trafficking process responsible for the degradation of long-lived, misfolded or abnormal proteins, as well as damaged or surplus organelles. Abnormalities of the autophagic activity may result in the accumulation of protein aggregates, organelle dysfunction, and autophagy disorders were associated with various diseases. Hence, mechanisms of autophagy regulation are under exploration. Methods Over-expression of hsa-miR-376a1 (shortly MIR376A) was performed to evaluate its effects on autophagy. Autophagy-related targets of the miRNA were predicted using Microcosm Targets and MIRanda bioinformatics tools and experimentally validated. Endogenous miRNA was blocked using antagomirs and the effects on target expression and autophagy were analyzed. Luciferase tests were performed to confirm that 3′ UTR sequences in target genes were functional. Differential expression of MIR376A and the related MIR376B was compared using TaqMan quantitative PCR. Results Here, we demonstrated that, a microRNA (miRNA) from the DLK1/GTL2 gene cluster, MIR376A, played an important role in autophagy regulation. We showed that, amino acid and serum starvation-induced autophagy was blocked by MIR376A overexpression in MCF-7 and Huh7 cells. MIR376A shared the same seed sequence and had overlapping targets with MIR376B, and similarly blocked the expression of key autophagy proteins ATG4C and BECN1 (Beclin 1). Indeed, 3′ UTR sequences in the mRNA of these autophagy proteins were responsive to MIR376A in luciferase assays. Antagomir tests showed that, endogenous MIR376A was participating to the control of ATG4C and BECN1 transcript and protein levels. Moreover, blockage of endogenous MIR376A accelerated starvation-induced autophagic activity. Interestingly, MIR376A and MIR376B levels were increased with different kinetics in response to starvation stress and tissue-specific level differences were also observed, pointing out to an overlapping but miRNA-specific biological role. Conclusions Our findings underline the importance of miRNAs encoded by the DLK1/GTL2 gene cluster in stress-response control mechanisms, and introduce MIR376A as a new regulator of autophagy.
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Affiliation(s)
- Gozde Korkmaz
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
| | - Kumsal Ayse Tekirdag
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
| | - Deniz Gulfem Ozturk
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
| | - Ali Kosar
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
| | - Osman Ugur Sezerman
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
| | - Devrim Gozuacik
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
- * E-mail:
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105
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Formosa A, Markert EK, Lena AM, Italiano D, Finazzi-Agro' E, Levine AJ, Bernardini S, Garabadgiu AV, Melino G, Candi E. MicroRNAs, miR-154, miR-299-5p, miR-376a, miR-376c, miR-377, miR-381, miR-487b, miR-485-3p, miR-495 and miR-654-3p, mapped to the 14q32.31 locus, regulate proliferation, apoptosis, migration and invasion in metastatic prostate cancer cells. Oncogene 2013; 33:5173-82. [PMID: 24166498 DOI: 10.1038/onc.2013.451] [Citation(s) in RCA: 248] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 07/24/2013] [Accepted: 08/09/2013] [Indexed: 12/26/2022]
Abstract
miRNAs act as oncogenes or tumor suppressors in a wide variety of human cancers, including prostate cancer (PCa). We found a severe and consistent downregulation of miRNAs, miR-154, miR-299-5p, miR-376a, miR-376c, miR-377, miR-381, miR-487b, miR-485-3p, miR-495 and miR-654-3p, mapped to the 14q32.31 region in metastatic cell lines as compared with normal prostatic epithelial cells (PrEC). In specimens of human prostate (28 normals, 99 primary tumors and 13 metastases), lower miRNA levels correlated significantly with a higher incidence of metastatic events and higher prostate specific antigen (PSA) levels, with similar trends observed for lymph node invasion and the Gleason score. We transiently transfected 10 members of the 14q32.31 cluster in normal prostatic epithelial cell lines and characterized their affect on malignant cell behaviors, including proliferation, apoptosis, migration and invasion. Finally, we identified FZD4, a gene important for epithelial-to-mesenchymal transition in (PCa), as a target of miR-377.
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Affiliation(s)
- A Formosa
- 1] University of Tor Vergata, Department Experimental Medicine and Surgery, Rome, Italy [2] IDI-IRCCS, Rome, Italy
| | - E K Markert
- The Simons Center for Systems Biology, Institute for Advanced Study, Princeton, NJ, USA
| | - A M Lena
- University of Tor Vergata, Department Experimental Medicine and Surgery, Rome, Italy
| | - D Italiano
- University of Tor Vergata, Department Experimental Medicine and Surgery, Rome, Italy
| | - E Finazzi-Agro'
- University of Tor Vergata, Department Experimental Medicine and Surgery, Rome, Italy
| | - A J Levine
- The Simons Center for Systems Biology, Institute for Advanced Study, Princeton, NJ, USA
| | - S Bernardini
- University of Tor Vergata, Department Experimental Medicine and Surgery, Rome, Italy
| | - A V Garabadgiu
- Laboratory of Molecular Pharmacology, Saint-Petersburg Technological Institute, 26 Moskovsky Prospect, Petersburg, Russia
| | - G Melino
- 1] University of Tor Vergata, Department Experimental Medicine and Surgery, Rome, Italy [2] IDI-IRCCS, Rome, Italy
| | - E Candi
- University of Tor Vergata, Department Experimental Medicine and Surgery, Rome, Italy
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106
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Cuk K, Zucknick M, Madhavan D, Schott S, Golatta M, Heil J, Marmé F, Turchinovich A, Sinn P, Sohn C, Junkermann H, Schneeweiss A, Burwinkel B. Plasma microRNA panel for minimally invasive detection of breast cancer. PLoS One 2013; 8:e76729. [PMID: 24194846 PMCID: PMC3806790 DOI: 10.1371/journal.pone.0076729] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Accepted: 08/23/2013] [Indexed: 12/13/2022] Open
Abstract
Over the last few years, circulating microRNAs (miRNAs) have emerged as promising novel and minimally invasive markers for various diseases, including cancer. We already showed that certain miRNAs are deregulated in the plasma of breast cancer patients when compared to healthy women. Herein we have further explored their potential to serve as breast cancer early detection markers in blood plasma. Circulating miR-127-3p, miR-376a and miR-652, selected as candidates from a miRNA array-based screening, were found to be associated with breast cancer for the first time (n = 417). Further we validated our previously reported circulating miRNAs (miR-148b, miR-376c, miR-409-3p and miR-801) in an independent cohort (n = 210) as elevated in the plasma of breast cancer patients compared to healthy women. We described, for the first time in breast cancer, an over-representation of deregulated miRNAs (miR-127-3p, miR-376a, miR-376c and miR-409-3p) originating from the chromosome 14q32 region. The inclusion of patients with benign breast tumors enabled the observation that miR-148b, miR-652 and miR-801 levels are even elevated in the plasma of women with benign tumors when compared to healthy controls. Furthermore, an analysis of samples stratified by cancer stage demonstrated that miR-127-3p, miR-148b, miR-409-3p, miR-652 and miR-801 can detect also stage I or stage II breast cancer thus making them attractive candidates for early detection. Finally, ROC curve analysis showed that a panel of these seven circulating miRNAs has substantial diagnostic potential with an AUC of 0.81 for the detection of benign and malignant breast tumors, which further increased to 0.86 in younger women (up to 50 years of age).
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Affiliation(s)
- Katarina Cuk
- Molecular Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Biology of Breast Cancer, University Women’s Clinic, Heidelberg, Germany
- * E-mail:
| | - Manuela Zucknick
- Division of Biostatistics, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Dharanija Madhavan
- Molecular Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Biology of Breast Cancer, University Women’s Clinic, Heidelberg, Germany
| | - Sarah Schott
- Department of Gynecology and Obstetrics, University Women’s Clinic, Heidelberg, Germany
| | - Michael Golatta
- Department of Gynecology and Obstetrics, University Women’s Clinic, Heidelberg, Germany
| | - Jörg Heil
- Department of Gynecology and Obstetrics, University Women’s Clinic, Heidelberg, Germany
| | - Frederik Marmé
- Department of Gynecology and Obstetrics, University Women’s Clinic, Heidelberg, Germany
- National Center for Tumor Diseases (NCT), Heidelberg, Germany
| | - Andrey Turchinovich
- Molecular Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Biology of Breast Cancer, University Women’s Clinic, Heidelberg, Germany
| | - Peter Sinn
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany
| | - Christof Sohn
- Department of Gynecology and Obstetrics, University Women’s Clinic, Heidelberg, Germany
| | - Hans Junkermann
- Department of Gynecology and Obstetrics, University Women’s Clinic, Heidelberg, Germany
| | - Andreas Schneeweiss
- Department of Gynecology and Obstetrics, University Women’s Clinic, Heidelberg, Germany
- National Center for Tumor Diseases (NCT), Heidelberg, Germany
| | - Barbara Burwinkel
- Molecular Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Molecular Biology of Breast Cancer, University Women’s Clinic, Heidelberg, Germany
- National Center for Tumor Diseases (NCT), Heidelberg, Germany
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107
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Kamanu TKK, Radovanovic A, Archer JAC, Bajic VB. Exploration of miRNA families for hypotheses generation. Sci Rep 2013; 3:2940. [PMID: 24126940 PMCID: PMC3796740 DOI: 10.1038/srep02940] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 09/25/2013] [Indexed: 12/13/2022] Open
Abstract
Technological improvements have resulted in increased discovery of new microRNAs (miRNAs) and refinement and enrichment of existing miRNA families. miRNA families are important because they suggest a common sequence or structure configuration in sets of genes that hint to a shared function. Exploratory tools to enhance investigation of characteristics of miRNA families and the functions of family-specific miRNA genes are lacking. We have developed, miRNAVISA, a user-friendly web-based tool that allows customized interrogation and comparisons of miRNA families for hypotheses generation, and comparison of per-species chromosomal distribution of miRNA genes in different families. This study illustrates hypothesis generation using miRNAVISA in seven species. Our results unveil a subclass of miRNAs that may be regulated by genomic imprinting, and also suggest that some miRNA families may be species-specific, as well as chromosome- and/or strand-specific.
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Affiliation(s)
- Timothy K K Kamanu
- King Abdullah University of Science and Technology (KAUST), Computational Bioscience Research Center (CBRC), Thuwal, Kingdom of Saudi Arabia
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108
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Panda AC, Grammatikakis I, Yoon JH, Abdelmohsen K. Posttranscriptional regulation of insulin family ligands and receptors. Int J Mol Sci 2013; 14:19202-29. [PMID: 24051403 PMCID: PMC3794829 DOI: 10.3390/ijms140919202] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 08/17/2013] [Accepted: 09/06/2013] [Indexed: 01/02/2023] Open
Abstract
Insulin system including ligands (insulin and IGFs) and their shared receptors (IR and IGFR) are critical regulators of insulin signaling and glucose homeostasis. Altered insulin system is associated with major pathological conditions like diabetes and cancer. The mRNAs encoding for these ligands and their receptors are posttranscriptionally controlled by three major groups of regulators; (i) alternative splicing regulatory factors; (ii) turnover and translation regulator RNA-binding proteins (TTR-RBPs); and (iii) non-coding RNAs including miRNAs and long non-coding RNAs (lncRNAs). In this review, we discuss the influence of these regulators on alternative splicing, mRNA stability and translation. Due to the pathological impacts of insulin system, we also discussed the possibilities of discovering new potential regulators which will improve understanding of insulin system and associated diseases.
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Affiliation(s)
- Amaresh C Panda
- Laboratory of Genetics, National Institute on Aging-Intramural Research Program, National Institutes of Health, Baltimore, MD 21224, USA.
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109
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Nemoto T, Mano A, Shibasaki T. miR-449a contributes to glucocorticoid-induced CRF-R1 downregulation in the pituitary during stress. Mol Endocrinol 2013; 27:1593-602. [PMID: 23893957 DOI: 10.1210/me.2012-1357] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The hypothalamic-pituitary-adrenal axis is controlled by the feedback of glucocorticoids on the hypothalamus and pituitary. Stress increases CRF, ACTH, and glucocorticoid secretion. The expression of not only CRF mRNA in the hypothalamus and proopiomelanocortin mRNA in corticotrophs, but also CRF type 1 receptor (CRF-R1) mRNA and protein on corticotrophs are downregulated through glucocorticoids. However, the mechanisms underlying the glucocorticoid-induced CRF-R1 downregulation are not fully understood. Short RNA molecules, called microRNAs (miRNAs), are posttranscriptional regulators that usually induce translational repression or gene silencing via binding to complementary sequences within target mRNAs. We hypothesized that glucocorticoids may induce the expression of miRNAs in the pituitary, which are involved in glucocorticoid-induced downregulation of CRF-R1. We found 3 miRNAs with sequences predicted to bind to the CRF-R1 3' untranslated region (3'-UTR) by database search. Expression of 1 of these miRNAs (miR-449a) was significantly higher in the anterior pituitary of restrained rats than in that of unrestrained control rats. Expression of miR-449a was evident in many anterior pituitary cells, including corticotrophs. Although overexpression of miR-449a decreased CRF-R1 mRNA and CRF-R1 protein expression, knockdown of miR-449a attenuated dexamethasone-induced suppression of CRF-R1 mRNA and CRF-R1 protein expression in the monolayer-cultured pituitary cells. Notably, luciferase activity was significantly lower in cells cotransfected with a luciferase vector containing the CRF-R1 3'-UTR and a miR-449a vector. miR-449a expression was significantly increased by dexamethasone. Adrenalectomy attenuated restraint-induced increase in miR-449a expression in the pituitary. These results indicated that miR-449a plays an important role in stress-induced, glucocorticoid-mediated downregulation of CRF-R1 expression.
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Affiliation(s)
- Takahiro Nemoto
- Department of Physiology, Nippon Medical School, 1-1-5, Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan.
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110
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Jin Y, Peng D, Shen Y, Xu M, Liang Y, Xiao B, Lu J. MicroRNA-376c Inhibits Cell Proliferation and Invasion in Osteosarcoma by Targeting to Transforming Growth Factor-Alpha. DNA Cell Biol 2013; 32:302-9. [PMID: 23631646 DOI: 10.1089/dna.2013.1977] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Yi Jin
- Department of Orthopedics, Second Xiangya Hospital, Central South University, Changsha, China
| | - Dan Peng
- Department of Orthopedics, Second Xiangya Hospital, Central South University, Changsha, China
| | - Yi Shen
- Department of Orthopedics, Second Xiangya Hospital, Central South University, Changsha, China
| | - Min Xu
- Department of Orthopedics, Second Xiangya Hospital, Central South University, Changsha, China
| | - Ying Liang
- National Engineering Laboratory for Rice and By-product Deep Processing, Central South University of Forestry and Technology, Changsha, China
| | - Bowen Xiao
- Thoracic and Cardiovascular Surgery Ward, Central Hospital of Changsha, Changsha, China
| | - Jing Lu
- The Medical School of Hunan University of Chinese Medicine, Changsha, China
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111
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Sheng J, Luo W, Yu F, Gao N, Hu B. MicroRNA-376a sensitizes cells following DNA damage by downregulating MEPE expression. Cancer Biother Radiopharm 2013; 28:523-9. [PMID: 23570370 DOI: 10.1089/cbr.2012.1446] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
MicroRNAs (miRNAs) are a class of endogenous molecules that post-transcriptionally regulate target gene expression and play an important role in many developmental processes. Matrix extracellular phosphoglycoprotein (MEPE) is related to bone metabolism. We recently reported that MEPE protects cells from DNA damage-induced killing. The purpose of this study is to investigate whether miRNAs targeting MEPE play an important role in DNA damage response. We report in this study that miR-376a directly targets MEPE, and overexpression of miR-376a reduces the G2 arrest of the cells and sensitizes the cells to DNA damage-induced killing. These results indicate an association of MEPE gene inactivation with decreased survival after DNA damage and also provide useful information for miRNA-based drug development: a new target for sensitizing human tumor cells to radiotherapy or chemotherapy.
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Affiliation(s)
- Jipo Sheng
- Department of Medical Molecular Biology, Beijing Institute of Biotechnology, People's Republic of China
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112
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Leibowitz-Amit R, Sidi Y, Avni D. Aberrations in the micro-RNA biogenesis machinery and the emerging roles of micro-RNAs in the pathogenesis of cutaneous malignant melanoma. Pigment Cell Melanoma Res 2012; 25:740-57. [DOI: 10.1111/pcmr.12018] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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