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Bersani C, Huss M, Giacomello S, Xu LD, Bianchi J, Eriksson S, Jerhammar F, Alexeyenko A, Vilborg A, Lundeberg J, Lui WO, Wiman KG. Genome-wide identification of Wig-1 mRNA targets by RIP-Seq analysis. Oncotarget 2016; 7:1895-911. [PMID: 26672765 PMCID: PMC4811505 DOI: 10.18632/oncotarget.6557] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 11/15/2015] [Indexed: 02/06/2023] Open
Abstract
RNA-binding proteins (RBPs) play important roles in the regulation of gene expression through a variety of post-transcriptional mechanisms. The p53-induced RBP Wig-1 (Zmat3) binds RNA through its zinc finger domains and enhances stability of p53 and N-Myc mRNAs and decreases stability of FAS mRNA. To identify novel Wig-1-bound RNAs, we performed RNA-immunoprecipitation followed by high-throughput sequencing (RIP-Seq) in HCT116 and Saos-2 cells. We identified 286 Wig-1-bound mRNAs common between the two cell lines. Sequence analysis revealed that AU-rich elements (AREs) are highly enriched in the 3′UTR of these Wig-1-bound mRNAs. Network enrichment analysis showed that Wig-1 preferentially binds mRNAs involved in cell cycle regulation. Moreover, we identified a 2D Wig-1 binding motif in HIF1A mRNA. Our findings confirm that Wig-1 is an ARE-BP that regulates cell cycle-related processes and provide a novel view of how Wig-1 may bind mRNA through a putative structural motif. We also significantly extend the repertoire of Wig-1 target mRNAs. Since Wig-1 is a transcriptional target of the tumor suppressor p53, these results have implications for our understanding of p53-dependent stress responses and tumor suppression.
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Affiliation(s)
- Cinzia Bersani
- Department of Oncology-Pathology, Karolinska Institutet, Cancer Center Karolinska, Stockholm, Sweden
| | - Mikael Huss
- Science for Life Laboratory, School of Biotechnology, Royal Institute of Technology, Solna, Sweden
| | - Stefania Giacomello
- Science for Life Laboratory, School of Biotechnology, Royal Institute of Technology, Solna, Sweden
| | - Li-Di Xu
- Department of Oncology-Pathology, Karolinska Institutet, Cancer Center Karolinska, Stockholm, Sweden
| | - Julie Bianchi
- Department of Oncology-Pathology, Karolinska Institutet, Cancer Center Karolinska, Stockholm, Sweden
| | - Sofi Eriksson
- Department of Oncology-Pathology, Karolinska Institutet, Cancer Center Karolinska, Stockholm, Sweden
| | - Fredrik Jerhammar
- Department of Oncology-Pathology, Karolinska Institutet, Cancer Center Karolinska, Stockholm, Sweden
| | - Andrey Alexeyenko
- Department of Microbiology, Tumour and Cell biology, Bioinformatics Infrastructure for Life Sciences, Science for Life Laboratory, Karolinska Institutet, Stockholm, Sweden
| | - Anna Vilborg
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA
| | - Joakim Lundeberg
- Science for Life Laboratory, School of Biotechnology, Royal Institute of Technology, Solna, Sweden
| | - Weng-Onn Lui
- Department of Oncology-Pathology, Karolinska Institutet, Cancer Center Karolinska, Stockholm, Sweden
| | - Klas G Wiman
- Department of Oncology-Pathology, Karolinska Institutet, Cancer Center Karolinska, Stockholm, Sweden
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Kim SH, Shahani N, Bae BI, Sbodio JI, Chung Y, Nakaso K, Paul BD, Sawa A. Allele-specific regulation of mutant Huntingtin by Wig1, a downstream target of p53. Hum Mol Genet 2016; 25:2514-2524. [PMID: 27206983 DOI: 10.1093/hmg/ddw115] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 03/15/2016] [Accepted: 04/11/2016] [Indexed: 02/07/2023] Open
Abstract
p53 has been implicated in the pathophysiology of Huntington's disease (HD). Nonetheless, the molecular mechanism of how p53 may play a unique role in the pathology remains elusive. To address this question at the molecular and cellular biology levels, we initially screened differentially expressed molecules specifically dependent on p53 in a HD animal model. Among the candidate molecules, wild-type p53-induced gene 1 (Wig1) is markedly upregulated in the cerebral cortex of HD patients. Wig1 preferentially upregulates the level of mutant Huntingtin (Htt) compared with wild-type Htt. This allele-specific characteristic of Wig1 is likely to be explained by higher affinity binding to mutant Htt transcripts than normal counterpart for the stabilization. Knockdown of Wig1 level significantly ameliorates mutant Htt-elicited cytotoxicity and aggregate formation. Together, we propose that Wig1, a key p53 downstream molecule in HD condition, play an important role in stabilizing mutant Htt mRNA and thereby accelerating HD pathology in the mHtt-p53-Wig1 positive feedback manner.
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Affiliation(s)
- Sun-Hong Kim
- Department of Psychiatry and Behavioral Sciences
| | | | - Byoung-Ii Bae
- Neuroscience Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Juan I Sbodio
- Neuroscience Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Youjin Chung
- Department of Psychiatry and Behavioral Sciences
| | - Kazuhiro Nakaso
- Division of Medical Biochemistry, Department of Pathophysiological and Therapeutic Science, Tottori University Faculty of Medicine, 86, Nishicho, Yonago, 683-8503, Japan
| | - Bindu D Paul
- Neuroscience Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Akira Sawa
- Department of Psychiatry and Behavioral Sciences, .,Neuroscience Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
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Grozav A, Balacescu O, Balacescu L, Cheminel T, Berindan-Neagoe I, Therrien B. Synthesis, Anticancer Activity, and Genome Profiling of Thiazolo Arene Ruthenium Complexes. J Med Chem 2015; 58:8475-90. [PMID: 26488797 DOI: 10.1021/acs.jmedchem.5b00855] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Sixteen hydrazinyl-thiazolo arene ruthenium complexes of the general formula [(η(6)-p-cymene)Ru(N,N'-hydrazinyl-thiazolo)Cl]Cl were synthesized. All complexes were tested in vitro for their antiproliferative activity on three tumor cell lines (HeLa, A2780, and A2780cisR) and on a noncancerous cell line (HFL-1). A superior cytotoxic activity of the ruthenium complexes as compared to cisplatin and oxaliplatin, on both cisplatin-sensitive and cisplatin resistant ovarian cancer cells, was observed. In addition, the biological activity of two selected derivatives was evaluated using microarray gene expression assay and ingenuity pathway analysis. p53 signaling was identified as an important pathway modulated by both arene ruthenium compounds. New activated molecules such as FAS, ZMAT3, PRMT2, BBC3/PUMA, and PDCD4, whose overexpressions are correlated with overcoming resistance to cisplatin therapy, were also identified as potential targets. Moreover, the arene ruthenium complexes can be used in association with cisplatin to prevent cisplatin resistance development and synergistically to induce cell death in ovarian cancer cells.
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Affiliation(s)
- Adriana Grozav
- Faculty of Pharmacy, "Iuliu Hatieganu" University of Medicine and Pharmacy , Victor Babes Str. 41, RO-400012 Cluj-Napoca, Romania
| | - Ovidiu Balacescu
- Department of Functional Genomics, Proteomics and Experimental Pathology, The Oncology Institute "Prof Dr. Ion Chiricuta" , 34-36 Republicii Str, RO-400015, Cluj-Napoca, Romania
| | - Loredana Balacescu
- Department of Functional Genomics, Proteomics and Experimental Pathology, The Oncology Institute "Prof Dr. Ion Chiricuta" , 34-36 Republicii Str, RO-400015, Cluj-Napoca, Romania
| | - Thomas Cheminel
- Institut de Chimie, Université de Neuchâtel , 51 Avenue de Bellevaux, CH-2000 Neuchâtel, Switzerland
| | - Ioana Berindan-Neagoe
- Department of Functional Genomics, Proteomics and Experimental Pathology, The Oncology Institute "Prof Dr. Ion Chiricuta" , 34-36 Republicii Str, RO-400015, Cluj-Napoca, Romania.,Research Center of Functional Genomics, Biomedicine and Translational Medicine, "Iuliu Hatieganu″ University of Medicine and Pharmacy , 23 Marinescu Str, RO-400337 Cluj-Napoca, Romania
| | - Bruno Therrien
- Institut de Chimie, Université de Neuchâtel , 51 Avenue de Bellevaux, CH-2000 Neuchâtel, Switzerland
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Wig-1 regulates cell cycle arrest and cell death through the p53 targets FAS and 14-3-3σ. Oncogene 2014; 33:4407-17. [PMID: 24469038 PMCID: PMC4150987 DOI: 10.1038/onc.2013.594] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 10/31/2013] [Accepted: 12/16/2013] [Indexed: 01/29/2023]
Abstract
Wig-1, also known as ZMAT3, is a p53 target gene that encodes an RNA-binding zinc-finger protein involved in the regulation of mRNA stability through binding to AU-rich elements (AREs). We have used microarray analysis to identify novel Wig-1 target mRNAs. We identified 2447 transcripts with >fourfold differential expression between Wig-1 and control small interfering (si)RNA-treated HCT116 cells. Several p53 target genes were among the deregulated transcripts. We found that Wig-1 regulates FAS and 14-3-3σ mRNA independently of p53. We show that Wig-1 binds to FAS mRNA 3'-UTR and decreases its stability through an ARE in the 3'-UTR. Depletion of Wig-1 was associated with increased cell death and reduced cell cycle arrest upon DNA damage. Our results suggest a role of Wig-1 as a survival factor that directs the p53 stress response toward cell cycle arrest rather than apoptosis through the regulation of FAS and 14-3-3σ mRNA levels.
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Kim BC, Lee HC, Lee JJ, Choi CM, Kim DK, Lee JC, Ko YG, Lee JS. Wig1 prevents cellular senescence by regulating p21 mRNA decay through control of RISC recruitment. EMBO J 2012; 31:4289-303. [PMID: 23085987 DOI: 10.1038/emboj.2012.286] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Accepted: 09/27/2012] [Indexed: 12/21/2022] Open
Abstract
Premature senescence, a key strategy used to suppress carcinogenesis, can be driven by p53/p21 proteins in response to various stresses. Here, we demonstrate that Wig1 plays a critical role in this process through regulation of p21 mRNA stability. Wig1 controls the association of Argonaute2 (Ago2), a central component of the RNA-induced silencing complex (RISC), with target p21 mRNA via binding of the stem-loop structure near the microRNA (miRNA) target site. Depletion of Wig1 prohibited miRNA-mediated p21 mRNA decay and resulted in premature senescence. Wig1 plays an essential role in cell proliferation, as demonstrated in tumour xenografts in mice, and Wig1 and p21 mRNA levels are inversely correlated in human normal and cancer tissues. Together, our data indicate a novel role of Wig1 in RISC target accessibility, which is a key step in RNA-mediated gene silencing. In addition, these findings indicate that fine-tuning of p21 levels by Wig1 is essential for the prevention of cellular senescence.
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Affiliation(s)
- Bong Cho Kim
- Division of Radiation Cancer Research, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
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6
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Abstract
Wig-1 is a transcriptional target of the p53 tumor suppressor and encodes an mRNA stability-regulating protein. We show here that Wig-1 knockdown causes a dramatic inhibition of N-Myc expression and triggers differentiation in neuroblastoma cells carrying amplified N-Myc. Transient Wig-1 knockdown significantly delays development of N-Myc-driven tumors in mice. We also show that N-Myc expression is induced upon moderate p53-activating stress, suggesting a role of the p53-Wig-1-N-Myc axis in promoting cell cycle re-entry upon p53-induced cell cycle arrest and DNA repair. Moreover, our findings raise possibilities for the improved treatment of poor prognosis neuroblastomas that carry amplified N-Myc.
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Abstract
Background Wig-1 is a transcription factor regulated by p53 that can interact with hnRNP A2/B1, RNA Helicase A, and dsRNAs, which plays an important role in RNA and protein stabilization. in vitro studies have shown that wig-1 binds p53 mRNA and stabilizes it by protecting it from deadenylation. Furthermore, p53 has been implicated as a causal factor in neurodegenerative diseases based in part on its selective regulatory function on gene expression, including genes which, in turn, also possess regulatory functions on gene expression. In this study we focused on the wig-1 transcription factor as a downstream p53 regulated gene and characterized the effects of wig-1 down regulation on gene expression in mouse liver and brain. Methods and Results Antisense oligonucleotides (ASOs) were identified that specifically target mouse wig-1 mRNA and produce a dose-dependent reduction in wig-1 mRNA levels in cell culture. These wig-1 ASOs produced marked reductions in wig-1 levels in liver following intraperitoneal administration and in brain tissue following ASO administration through a single striatal bolus injection in FVB and BACHD mice. Wig-1 suppression was well tolerated and resulted in the reduction of mutant Htt protein levels in BACHD mouse brain but had no effect on normal Htt protein levels nor p53 mRNA or protein levels. Expression microarray analysis was employed to determine the effects of wig-1 suppression on genome-wide expression in mouse liver and brain. Reduction of wig-1 caused both down regulation and up regulation of several genes, and a number of wig-1 regulated genes were identified that potentially links wig-1 various signaling pathways and diseases. Conclusion Antisense oligonucleotides can effectively reduce wig-1 levels in mouse liver and brain, which results in specific changes in gene expression for pathways relevant to both the nervous system and cancer.
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Wen Y, Gamazon ER, Bleibel WK, Wing C, Mi S, McIlwee BE, Delaney SM, Duan S, Im HK, Dolan ME. An eQTL-based method identifies CTTN and ZMAT3 as pemetrexed susceptibility markers. Hum Mol Genet 2011; 21:1470-80. [PMID: 22171072 DOI: 10.1093/hmg/ddr583] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Pemetrexed, approved for the treatment of non-small cell lung cancer and malignant mesothelioma, has adverse effects including neutropenia, leucopenia, thrombocytopenia, anemia, fatigue and nausea. The results we report here represent the first genome-wide study aimed at identifying genetic predictors of pemetrexed response. We utilized expression quantitative trait loci (eQTLs) mapping combined with drug-induced cytotoxicity data to gain mechanistic insights into the observed genetic associations with pemetrexed susceptibility. We found that CTTN and ZMAT3 expression signature explained >30% of the pemetrexed susceptibility phenotype variation for pemetrexed in the discovery population. Replication using PCR and a semi-high-throughput, scalable assay system confirmed the initial discovery results in an independent set of samples derived from the same ancestry. Furthermore, functional validation in both germline and tumor cells demonstrates a decrease in cell survival following knockdown of CTTN or ZMAT3. In addition to our particular findings on genetic and gene expression predictors of susceptibility phenotype for pemetrexed, the work presented here will be valuable to the robust discovery and validation of genetic determinants and gene expression signatures of various chemotherapeutic susceptibilities.
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Affiliation(s)
- Yujia Wen
- Section of Hematology/Oncology, University of Chicago, Chicago, IL 60637, USA
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Vilborg A, Bersani C, Wilhelm MT, Wiman KG. The p53 target Wig-1: a regulator of mRNA stability and stem cell fate? Cell Death Differ 2011; 18:1434-40. [PMID: 21394102 DOI: 10.1038/cdd.2011.20] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Wig-1 is a transcriptional target of the tumor suppressor p53 and encodes an unusual zinc-finger protein involved in post-transcriptional gene regulation. Wig-1 is expressed in all cell types investigated so far, with the highest levels in the brain, and is enriched in stem cells as compared with more differentiated cells of the same lineage. Wig-1 binds to both long double-stranded (ds) RNA and short microRNA-like dsRNA. We have shown that Wig-1 acts in a positive feedback loop that stabilizes p53 mRNA through an AU-rich element (ARE) in the p53 3'untranslated region. Our preliminary data indicate a more general effect of Wig-1 on ARE-containing mRNA. Here we shall summarize current knowledge about Wig-1 and discuss possible implications on p53 function and other cellular processes.
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Affiliation(s)
- A Vilborg
- Karolinska Institutet, Department of Oncology-Pathology, Cancer Center Karolinska, Stockholm, Sweden
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Zou YB, Guo W, Jiang YG, Wang RW, Zhao YP, Ma Z. Preparation of a Novel Monoclonal Antibody Specific for WIG-1 and Detection of Its Expression Pattern in Human Esophageal Carcinoma. Hybridoma (Larchmt) 2010; 29:431-6. [PMID: 21050045 DOI: 10.1089/hyb.2010.0043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ying-Bo Zou
- Department of Thoracic Surgery, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, P.R. China
| | - Wei Guo
- Department of Thoracic Surgery, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, P.R. China
| | - Yao-Guang Jiang
- Department of Thoracic Surgery, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, P.R. China
| | - Ru-Wen Wang
- Department of Thoracic Surgery, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, P.R. China
| | - Yun-Ping Zhao
- Department of Thoracic Surgery, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, P.R. China
| | - Zheng Ma
- Department of Thoracic Surgery, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, P.R. China
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Vilborg A, Wilhelm MT, Wiman KG. Regulation of tumor suppressor p53 at the RNA level. J Mol Med (Berl) 2010; 88:645-52. [PMID: 20306257 DOI: 10.1007/s00109-010-0609-2] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2010] [Revised: 02/22/2010] [Accepted: 02/24/2010] [Indexed: 01/07/2023]
Abstract
p53 is a key tumor suppressor that triggers cell cycle arrest, senescence, or apoptosis in response to cellular stress. Frequent p53 mutation in human tumors allows survival, sustained growth, and tumor progression. p53 is expressed at low levels under normal conditions, due to rapid protein turnover. Stress signaling induces p53 protein stabilization through phosphorylation and other post-translational modifications. However, recent studies have demonstrated critical regulation of p53 at the mRNA level, mediated via both the 5'UTR and the 3'UTR and affecting both the stability and the translation efficiency of the p53 mRNA. Both proteins and microRNAs have been implicated in such regulation. The p53 target gene Wig-1 encodes a zinc finger protein that binds to double-stranded RNA and enhances p53 mRNA stability by binding to the 3'UTR in a positive feedback loop. Here, we shall summarize current knowledge about regulation of the p53 mRNA and discuss possible implications for cancer therapy.
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Affiliation(s)
- Anna Vilborg
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
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12
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MacFarlane LA, Gu Y, Casson AG, Murphy PR. Regulation of fibroblast growth factor-2 by an endogenous antisense RNA and by argonaute-2. Mol Endocrinol 2010; 24:800-12. [PMID: 20197313 DOI: 10.1210/me.2009-0367] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
We have previously reported that elevated fibroblast growth factor-2 (FGF-2) expression is associated with tumor recurrence and reduced survival after surgical resection of esophageal cancer and that these risks are reduced in tumors coexpressing an endogenous antisense (FGF-AS) RNA. In the present study, we examined the role of the endogenous FGF-AS transcript in the regulation of FGF-2 expression in the human lung adenocarcinoma cell line Seg-1. FGF-2 and FGF-AS were temporally and spatially colocalized in the cytoplasm of individual cells, and knockdown of either FGF-2 or FGF-AS by target-specific siRNAs resulted in dose-dependent up-regulation of the complementary transcript and its encoded protein product. Using a luciferase reporter system, we show that these effects are mediated by interaction of the endogenous antisense RNA with the 3'-untranslated region of the FGF-2 mRNA. Deletion mapping identified a 392-nucleotide sequence in the 5823-nucleotide FGF-2 untranslated tail that is targeted by FGF-AS. Small interfering RNA-mediated knockdown of either FGF-AS or FGF-2 significantly increased the stability of the complementary partner mRNA, demonstrating that these mRNAs are mutually regulatory. Knockdown of FGF-AS also resulted in reduced expression of argonaute-2 (AGO-2) and a number of other elements of the endogenous micro-RNA/RNA interference pathways. Conversely, small interfering RNA-mediated knockdown of AGO-2 significantly increased the stability of the FGF-2 mRNA transcript and the steady-state levels of both FGF-2 mRNA and protein, suggesting a role for AGO-2 in the regulation of FGF-2 expression.
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Affiliation(s)
- Leigh-Ann MacFarlane
- Department of Physiology and Biophysics, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
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The p53 target Wig-1 regulates p53 mRNA stability through an AU-rich element. Proc Natl Acad Sci U S A 2009; 106:15756-61. [PMID: 19805223 DOI: 10.1073/pnas.0900862106] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The p53 target gene Wig-1 encodes a double-stranded-RNA-binding zinc finger protein. We show here that Wig-1 binds to p53 mRNA and stabilizes it through an AU-rich element (ARE) in the 3' UTR of the p53 mRNA. This effect is mirrored by enhanced p53 protein levels in both unstressed cells and cells exposed to p53-activating stress agents. Thus, the p53 target Wig-1 is a previously undescribed ARE-regulating protein that acts as a positive feedback regulator of p53, with implications both for the steady-state levels of p53 and for the p53 stress response. Our data reveal a previously undescribed link between the tumor suppressor p53 and posttranscriptional gene regulation via AREs in mRNA.
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Prahl M, Vilborg A, Palmberg C, Jörnvall H, Asker C, Wiman KG. The p53 target protein Wig-1 binds hnRNP A2/B1 and RNA Helicase A via RNA. FEBS Lett 2008; 582:2173-7. [DOI: 10.1016/j.febslet.2008.04.065] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2007] [Revised: 04/07/2008] [Accepted: 04/25/2008] [Indexed: 11/26/2022]
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Li Q, Wang G. Research progress of the relationship between microRNAs and p53 gene in oncogenesis. Shijie Huaren Xiaohua Zazhi 2008; 16:1332-1336. [DOI: 10.11569/wcjd.v16.i12.1332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The initiation and development of oncogenesis are a multi-step and complicated process, in which activation of oncogenes and inactivation of tumor suppressor genes are involved. MicroRNAs (miRNAs) are a new class of endogenous, non-coding small RNA molecules. It has been demonstrated that their expression levels are closely associated with human pathogenesis of cancers. They may participate in regulating the abnormal expression of oncogenes and tumor suppressor genes. Mutation in tumor suppressor gene p53 is the most frequent phenomenon in human cancer, and up to now, almost 50% human cancers are demonstrated associated with p53 mutation. Recent studies showed that miRNAs might play a role in regulating the tumor-suppressor activity of p53 gene. In this review, the research progress in this field is discussed.
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An analysis of the clinical and biologic significance of TP53 loss and the identification of potential novel transcriptional targets of TP53 in multiple myeloma. Blood 2008; 112:4235-46. [PMID: 18337559 DOI: 10.1182/blood-2007-10-119123] [Citation(s) in RCA: 113] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
TP53 is a tumor suppressor gene that functions as transcriptional regulator influencing cellular responses to DNA damage. Here we explored the clinical and transcriptional effects of TP53 expression in multiple myeloma (MM). We found that low expression of TP53, seen in approximately 10% of newly diagnosed patients, is highly correlated with TP53 deletion, an inferior clinical outcome, and represents an independent risk factor. Analysis of the expression of 122 known TP53 target genes in TP53-high vs -low MM cells from 351 newly diagnosed cases, revealed that only a few were highly correlated with TP53 expression. To elucidate TP53 regulatory networks in MM, we overexpressed TP53 in 4 MM cell lines. Gene expression profiling of these cell lines detected 85 significantly differentially expressed genes, with 50 up-regulated and 35 down-regulated. Unsupervised hierarchical clustering of myeloma samples from 351 newly diagnosed and 90 relapsed patients using the 85 putative TP53 target genes revealed 2 major subgroups showing a strong correlation with TP53 expression and survival. These data suggest that loss of TP53 expression in MM confers high risk and probably results in the deregulation of a novel set of MM-specific TP53-target genes. TP53 target gene specificity may be unique to different cell lineages.
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Shimizu M, Miyazaki I, Higashi Y, Eslava-Alva MJ, Diaz-Corrales FJ, Asanuma M, Ogawa N. Specific induction of PAG608 in cranial and spinal motor neurons of L-DOPA-treated parkinsonian rats. Neurosci Res 2007; 60:355-63. [PMID: 18242749 DOI: 10.1016/j.neures.2007.12.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2007] [Revised: 12/11/2007] [Accepted: 12/13/2007] [Indexed: 12/28/2022]
Abstract
We identified p53-activated gene 608 (PAG608) as a specifically induced gene in striatal tissue of L-DOPA (100mg/kg)-injected hemi-parkinsonian rats using differential display assay. In the present study, we further examined morphological distribution of PAG608 in the central nervous system of L-DOPA-treated hemi-parkinsonian rats. PAG608 expression was markedly induced in fibers and neuronal cells of the lateral globus pallidus and reticular thalamic nucleus adjacent to internal capsule, specifically in the parkinsonian side of L-DOPA-treated models. The protein was also constitutively expressed in motor neurons specifically in either side of the pontine nucleus and motor nuclei of trigeminal and facial nerves. Furthermore, L-DOPA-induced PAG608 expression on motor neurons in the contralateral side of the ventral horn of the spinal cord and the lateral corticospinal tract without cell loss. The specific induction of PAG608 6-48h after L-DOPA injection in the extrapyramidal tracts, pyramidal tracts and corresponding lower motor neurons of the spinal cords suggests its involvement in molecular events in stimulated motor neurons. Taken together with the constitutive expression of PAG608 in the motor nuclei of cranial nerves, PAG608 may be a useful marker of stressed or activated lower motor neurons.
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Affiliation(s)
- Masako Shimizu
- Department of Brain Science, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Okayama 700-8558, Japan
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Boultwood J, Pellagatti A, Cattan H, Lawrie CH, Giagounidis A, Malcovati L, Porta MGD, Jädersten M, Killick S, Fidler C, Cazzola M, Hellström-Lindberg E, Wainscoat JS. Gene expression profiling of CD34+cells in patients with the 5q− syndrome. Br J Haematol 2007; 139:578-89. [DOI: 10.1111/j.1365-2141.2007.06833.x] [Citation(s) in RCA: 130] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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