51
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Bermisheva MA, Takhirova ZR, Gilyazova IR, Khusnutdinova EK. MicroRNA Biogenesis Pathway Gene Polymorphisms Are Associated with Breast Cancer Risk. RUSS J GENET+ 2018. [DOI: 10.1134/s1022795418040051] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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52
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Lenart P, Novak J, Bienertova-Vasku J. PIWI-piRNA pathway: Setting the pace of aging by reducing DNA damage. Mech Ageing Dev 2018; 173:29-38. [PMID: 29580825 DOI: 10.1016/j.mad.2018.03.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/02/2018] [Accepted: 03/22/2018] [Indexed: 10/17/2022]
Abstract
Transposable elements (TEs) are powerful drivers of genome evolutionary dynamics but are principally deleterious to the host organism by compromising the integrity and function of the genome. The transposition of TEs may result in mutations and DNA damage. DNA double-strand breaks (DSBs), which may be caused by the transposition, are one of the processes directly linked to aging. TEs may thus be considered to constitute an internal source of aging and the frequency of transposition may, in turn, be considered to affect the pace of aging. The PIWI-piRNA pathway is a widespread strategy used by most animals to effectively suppress transposition. Interestingly, the PIWI-piRNA pathway is expressed predominantly in the animal germline, a more or less continuous immortal lineage set aside after the first few cell divisions of a developing embryo. Recent findings further imply that the PIWI-piRNA pathway and TE suppression constitute an important mechanism regulating aging. This article discusses the proposed role of the PIWI-piRNA pathway in setting the pace of aging as well as the possible mechanisms underlying this process.
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Affiliation(s)
- Peter Lenart
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Kamenice 5, Building A18, 625 00, Brno, Czech Republic; Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Kamenice 5, Building A29, 625 00, Brno, Czech Republic
| | - Jan Novak
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Kamenice 5, Building A18, 625 00, Brno, Czech Republic
| | - Julie Bienertova-Vasku
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Kamenice 5, Building A18, 625 00, Brno, Czech Republic; Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Kamenice 5, Building A29, 625 00, Brno, Czech Republic.
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53
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Piwi-interacting RNAs and PIWI genes as novel prognostic markers for breast cancer. Oncotarget 2018; 7:37944-37956. [PMID: 27177224 PMCID: PMC5122362 DOI: 10.18632/oncotarget.9272] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 04/28/2016] [Indexed: 02/07/2023] Open
Abstract
Piwi-interacting RNAs (piRNAs), whose role in germline maintenance has been established, are now also being classified as post-transcriptional regulators of gene expression in somatic cells. PIWI proteins, central to piRNA biogenesis, have been identified as genetic and epigenetic regulators of gene expression. piRNAs/PIWIs have emerged as potential biomarkers for cancer but their relevance to breast cancer has not been comprehensively studied. piRNAs and mRNAs were profiled from normal and breast tumor tissues using next generation sequencing and Agilent platforms, respectively. Gene targets for differentially expressed piRNAs were identified from mRNA expression dataset. piRNAs and PIWI genes were independently assessed for their prognostic significance (outcomes: Overall Survival, OS and Recurrence Free Survival, RFS). We discovered eight piRNAs as novel independent prognostic markers and their association with OS was confirmed in an external dataset (The Cancer Genome Atlas). Further, PIWIL3 and PIWIL4 genes showed prognostic relevance. 306 gene targets exhibited reciprocal relationship with piRNA expression. Cancer cell pathways such as apoptosis and cell signaling were the key Gene Ontology terms associated with the regulated gene targets. Overall, we have captured the entire cascade of events in a dysregulated piRNA pathway and have identified novel markers for breast cancer prognostication.
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54
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Salamo O, Mortaz E, Mirsaeidi M. Noncoding RNAs: New Players in Pulmonary Medicine and Sarcoidosis. Am J Respir Cell Mol Biol 2018; 58:147-156. [DOI: 10.1165/rcmb.2017-0196tr] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Affiliation(s)
- Oriana Salamo
- Division of Pulmonary and Critical Care, University of Miami, Miami, Florida
| | - Esmaeil Mortaz
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, the Netherlands; and
| | - Mehdi Mirsaeidi
- Division of Pulmonary and Critical Care, University of Miami, Miami, Florida
- Section of Pulmonary Medicine, Miami Veterans Affairs Healthcare System, Miami, Florida
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55
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Rizzo F, Rinaldi A, Marchese G, Coviello E, Sellitto A, Cordella A, Giurato G, Nassa G, Ravo M, Tarallo R, Milanesi L, Destro A, Torzilli G, Roncalli M, Di Tommaso L, Weisz A. Specific patterns of PIWI-interacting small noncoding RNA expression in dysplastic liver nodules and hepatocellular carcinoma. Oncotarget 2018; 7:54650-54661. [PMID: 27429044 PMCID: PMC5342370 DOI: 10.18632/oncotarget.10567] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 06/06/2016] [Indexed: 11/25/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the result of a stepwise process, often beginning with development within a cirrhotic liver of premalignant lesions, morphologically characterized by low- (LGDN) and high-grade (HGDN) dysplastic nodules. PIWI-interacting RNAs (piRNAs) are small noncoding RNAs (sncRNAs), 23-35 nucleotide-long, exerting epigenetic and post-transcriptional regulation of gene expression. Recently the PIWI-piRNA pathway, best characterized in germline cells, has been identified also in somatic tissues, including stem and cancer cells, where it influences key cellular processes.Small RNA sequencing was applied to search for liver piRNAs and to profile their expression patterns in cirrhotic nodules (CNs), LGDN, HGDN, early HCC and progressed HCC (pHCC), analyzing 55 samples (14 CN, 9 LGDN, 6 HGDN, 6 eHCC and 20 pHCC) from 17 patients, aiming at identifying possible relationships between these sncRNAs and liver carcinogenesis. We identified a 125 piRNA expression signature that characterize HCC from matched CNs, correlating also to microvascular invasion in HCC. Functional analysis of the predicted RNA targets of deregulated piRNAs indicates that these can target key signaling pathways involved in hepatocarcinogenesis and HCC progression, thereby affecting their activity. Interestingly, 24 piRNAs showed specific expression patterns in dysplastic nodules, respect to cirrhotic liver and/or pHCC.The results demonstrate that the PIWI-piRNA pathway is active in human liver, where it represents a new player in the molecular events that characterize hepatocarcinogenesis, from early stages to pHCC. Furthermore, they suggest that piRNAs might be new disease biomarkers, useful for differential diagnosis of dysplastic and neoplastic liver lesions.
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Affiliation(s)
- Francesca Rizzo
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry 'Schola Medica Salernitana', University of Salerno, Baronissi (SA), Italy
| | - Antonio Rinaldi
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry 'Schola Medica Salernitana', University of Salerno, Baronissi (SA), Italy
| | | | - Elena Coviello
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry 'Schola Medica Salernitana', University of Salerno, Baronissi (SA), Italy
| | - Assunta Sellitto
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry 'Schola Medica Salernitana', University of Salerno, Baronissi (SA), Italy
| | | | - Giorgio Giurato
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry 'Schola Medica Salernitana', University of Salerno, Baronissi (SA), Italy.,Genomix4life, University of Salerno, Baronissi (SA), Italy
| | - Giovanni Nassa
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry 'Schola Medica Salernitana', University of Salerno, Baronissi (SA), Italy.,Genomix4life, University of Salerno, Baronissi (SA), Italy
| | - Maria Ravo
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry 'Schola Medica Salernitana', University of Salerno, Baronissi (SA), Italy
| | - Roberta Tarallo
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry 'Schola Medica Salernitana', University of Salerno, Baronissi (SA), Italy
| | - Luciano Milanesi
- Institute for Biomedical Technologies, National Research Council, Milano, Italy
| | - Anna Destro
- Pathology Unit, Humanitas Clinical and Research Center, Rozzano-Milan, Italy
| | - Guido Torzilli
- Department of Biomedical Sciences, Humanitas University, Rozzano-Milan, Italy.,Hepatobiliary and General Surgery Division, Humanitas Clinical and Research Center, Rozzano-Milan, Italy
| | - Massimo Roncalli
- Pathology Unit, Humanitas Clinical and Research Center, Rozzano-Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Rozzano-Milan, Italy
| | - Luca Di Tommaso
- Pathology Unit, Humanitas Clinical and Research Center, Rozzano-Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Rozzano-Milan, Italy
| | - Alessandro Weisz
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery and Dentistry 'Schola Medica Salernitana', University of Salerno, Baronissi (SA), Italy
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56
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Heinemann FG, Tolkach Y, Deng M, Schmidt D, Perner S, Kristiansen G, Müller SC, Ellinger J. Serum miR-122-5p and miR-206 expression: non-invasive prognostic biomarkers for renal cell carcinoma. Clin Epigenetics 2018; 10:11. [PMID: 29410711 PMCID: PMC5781339 DOI: 10.1186/s13148-018-0444-9] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 01/11/2018] [Indexed: 12/20/2022] Open
Abstract
Background MicroRNAs (miRNA) play a relevant role in carcinogenesis, cancer progression, invasion, and metastasis. Thus, they can serve as diagnostic/prognostic biomarkers. The knowledge on circulating miRNAs for clear cell renal cell carcinomas (ccRCC) is limited. Our study was designed to identify novel biomarkers for ccRCC patients. Results The serum small RNA expression profile was determined in 18 ccRCC and 8 patients with benign renal tumors (BRT) using small RNA sequencing. We detected 29 differentially expressed miRNAs (17 upregulated and 12 downregulated in ccRCC) in the expression profiling cohort. Based on the expression levels, we next validated serum miR-122-5p, miR-193a-5p, and miR-206 levels in an independent cohort (68 ccRCC, 47 BRT, and 28 healthy individuals) using quantitative real-time PCR. Serum expression levels of miR-122-5p and miR-206 were significantly decreased in ccRCC compared to healthy individuals. Both miRNAs were circulating at similar levels in ccRCC and BRT patients. miR-193a-5p expression levels were not different within the study cohort. High serum miR-122-5p and miR-206 levels were associated with adverse clinicopathological parameters: miR-122-5p levels were correlated with metastatic RCC and grade, and miR-206 with pT-stage and metastasis. Furthermore, high miR-122-5p and miR-206 serum levels were associated with a shorter period of progression-free, cancer-specific, and overall survival in patients with ccRCC. Conclusion We identified serum miR-122-5p and miR-206 as novel non-invasive prognostic biomarkers for patients with ccRCC. Electronic supplementary material The online version of this article (10.1186/s13148-018-0444-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | - Yuri Tolkach
- 2Institute of Pathology, University Hospital Bonn, Bonn, Germany
| | - Mario Deng
- 3Institute of Pathology, Campus Luebeck, University Hospital Schleswig-Holstein, Luebeck, Germany
| | - Doris Schmidt
- 1Department of Urology, University Hospital Bonn, Bonn, Germany
| | - Sven Perner
- 3Institute of Pathology, Campus Luebeck, University Hospital Schleswig-Holstein, Luebeck, Germany
| | - Glen Kristiansen
- 2Institute of Pathology, University Hospital Bonn, Bonn, Germany
| | - Stefan C Müller
- 1Department of Urology, University Hospital Bonn, Bonn, Germany
| | - Jörg Ellinger
- 1Department of Urology, University Hospital Bonn, Bonn, Germany
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57
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Zaporozhchenko IA, Ponomaryova AA, Rykova EY, Laktionov PP. The potential of circulating cell-free RNA as a cancer biomarker: challenges and opportunities. Expert Rev Mol Diagn 2018; 18:133-145. [DOI: 10.1080/14737159.2018.1425143] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ivan A. Zaporozhchenko
- Laboratory of Molecular Medicine, Institute of Chemical Biology and Fundamental Medicine of SB RAS, Novosibirsk, Russia
- Laboratory of Biomedical Technologies, Centre of New Surgical Technologies, E.N. Meshalkin Siberian Federal Biomedical Research Center, Novosibirsk, Russia
| | - Anastasia A. Ponomaryova
- Laboratory of Immunology, Tomsk Cancer Research Institute of SB RAMS, Tomsk, Russia
- Department of Applied Physics, National Research Tomsk Polytechnic University, Tomsk, Russia
| | - Elena Yu Rykova
- Laboratory of Molecular Medicine, Institute of Chemical Biology and Fundamental Medicine of SB RAS, Novosibirsk, Russia
- Laboratory of Biomedical Technologies, Centre of New Surgical Technologies, E.N. Meshalkin Siberian Federal Biomedical Research Center, Novosibirsk, Russia
| | - Pavel P. Laktionov
- Laboratory of Molecular Medicine, Institute of Chemical Biology and Fundamental Medicine of SB RAS, Novosibirsk, Russia
- Laboratory of Biomedical Technologies, Centre of New Surgical Technologies, E.N. Meshalkin Siberian Federal Biomedical Research Center, Novosibirsk, Russia
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58
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Singh G, Roy J, Rout P, Mallick B. Genome-wide profiling of the PIWI-interacting RNA-mRNA regulatory networks in epithelial ovarian cancers. PLoS One 2018; 13:e0190485. [PMID: 29320577 PMCID: PMC5761873 DOI: 10.1371/journal.pone.0190485] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 12/17/2017] [Indexed: 12/27/2022] Open
Abstract
PIWI-interacting (piRNAs), ~23–36 nucleotide-long small non-coding RNAs (sncRNAs), earlier believed to be germline-specific, have now been identified in somatic cells, including cancer cells. These sncRNAs impact critical biological processes by fine-tuning gene expression at post-transcriptional and epigenetic levels. The expression of piRNAs in ovarian cancer, the most lethal gynecologic cancer is largely uncharted. In this study, we investigated the expression of PIWILs by qRT-PCR and western blotting and then identified piRNA transcriptomes in tissues of normal ovary and two most prevalent epithelial ovarian cancer subtypes, serous and endometrioid by small RNA sequencing. We detected 219, 256 and 234 piRNAs in normal ovary, endometrioid and serous ovarian cancer samples respectively. We observed piRNAs are encoded from various genomic regions, among which introns harbor the majority of them. Surprisingly, piRNAs originated from different genomic contexts showed the varied level of conservations across vertebrates. The functional analysis of predicted targets of differentially expressed piRNAs revealed these could modulate key processes and pathways involved in ovarian oncogenesis. Our study provides the first comprehensive piRNA landscape in these samples and a useful resource for further functional studies to decipher new mechanistic views of piRNA-mediated gene regulatory networks affecting ovarian oncogenesis. The RNA-seq data is submitted to GEO database (GSE83794).
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Affiliation(s)
- Garima Singh
- RNAi and Functional Genomics Laboratory, Department of Life Science, National Institute of Technology – Rourkela, Odisha, India
| | - Jyoti Roy
- RNAi and Functional Genomics Laboratory, Department of Life Science, National Institute of Technology – Rourkela, Odisha, India
| | - Pratiti Rout
- RNAi and Functional Genomics Laboratory, Department of Life Science, National Institute of Technology – Rourkela, Odisha, India
| | - Bibekanand Mallick
- RNAi and Functional Genomics Laboratory, Department of Life Science, National Institute of Technology – Rourkela, Odisha, India
- * E-mail: ,
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59
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Cordeiro A, Navarro A, Gaya A, Díaz-Beyá M, Gonzalez-Farré B, Castellano JJ, Fuster D, Martínez C, Martínez A, Monzó M. PiwiRNA-651 as marker of treatment response and survival in classical Hodgkin lymphoma. Oncotarget 2018; 7:46002-46013. [PMID: 27329591 PMCID: PMC5216777 DOI: 10.18632/oncotarget.10015] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 05/26/2016] [Indexed: 01/31/2023] Open
Abstract
PiwiRNAs, small non-coding RNAs processed by Piwi proteins, are involved in maintaining genome stability in germline cells. Recently, piwiRNA expression has been identified in some tumors. We have examined the potential reactivation of the Piwi/piwiRNA pathway in classical Hodgkin lymphoma (cHL). We found that Piwi proteins and three selected piwiRNAs, including piR-651, were expressed in cHL patients and cell lines, indicating that the Piwi/piwiRNA pathway is active in cHL. Interestingly, low levels of piR-651 were associated with lack of complete response to first-line treatment, as well as shorter disease-free and overall survival in a cohort of 94 cHL patients. At diagnosis, piR-651 was underexpressed in cHL serum samples compared to healthy controls, while after complete remission, piR-651 levels increased to levels similar to healthy controls. This is the first evidence that piwiRNAs are active in tumor and serum samples and impact prognosis in cHL.
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Affiliation(s)
- Anna Cordeiro
- Molecular Oncology and Embryology Laboratory, Human Anatomy Unit, School of Medicine, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Alfons Navarro
- Molecular Oncology and Embryology Laboratory, Human Anatomy Unit, School of Medicine, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Anna Gaya
- Hematology Department, Hospital Clinic Barcelona, IDIBAPS, Barcelona, Spain
| | - Marina Díaz-Beyá
- Hematology Department, Hospital Clinic Barcelona, IDIBAPS, Barcelona, Spain
| | | | - Joan Josep Castellano
- Molecular Oncology and Embryology Laboratory, Human Anatomy Unit, School of Medicine, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Dolors Fuster
- Molecular Oncology and Embryology Laboratory, Human Anatomy Unit, School of Medicine, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Carmen Martínez
- Hematology Department, Hospital Clinic Barcelona, IDIBAPS, Barcelona, Spain
| | - Antonio Martínez
- Hematopathology Section, Hospital Clinic Barcelona, IDIBAPS, Barcelona, Spain
| | - Mariano Monzó
- Molecular Oncology and Embryology Laboratory, Human Anatomy Unit, School of Medicine, University of Barcelona, IDIBAPS, Barcelona, Spain
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Assessment of piRNA biogenesis and function in testicular germ cell tumors and their precursor germ cell neoplasia in situ. BMC Cancer 2018; 18:20. [PMID: 29301509 PMCID: PMC5755174 DOI: 10.1186/s12885-017-3945-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 12/20/2017] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Aberrant overexpression of PIWI/piRNA pathway proteins is shown for many types of tumors. Interestingly, these proteins are downregulated in testicular germ cell tumors (TGCTs) compared to normal testis tissues. Here, we used germline and TGCT markers to assess the piRNA biogenesis and function in TGCTs and their precursor germ cell neoplasia in situ (GCNIS). METHODS We used small RNA deep sequencing, qRT-PCR, and mining public RNAseq/small RNA-seq datasets to examine PIWI/piRNA gene expression and piRNA biogenesis at four stages of TGCT development: (i) germ cells in healthy testis tissues, (ii) germ cells in testis tissues adjacent to TGCTs, (iii) GCNIS cells and (iv) TGCT cells. To this end, we studied three types of samples: (a) healthy testis, (b) testis tissues adjacent to two types of TGCTs (seminomas and nonseminomas) and containing both germ cells and GCNIS cells, as well as (c) matching TGCT samples. RESULTS Based on our analyses of small RNA-seq data as well as the presence/absence of expression correlation between PIWI/piRNA pathway genes and germline or TGCT markers, we can suggest that piRNA biogenesis is intact in germ cells present in healthy adult testes, and adjacent to TGCTs. Conversely, GCNIS and TGCT cells were found to lack PIWI/piRNA pathway gene expression and germline-like piRNA biogenesis. However, using an in vitro cell line model, we revealed a possible role for a short PIWIL2/HILI isoform expressed in TGCTs in posttranscriptional regulation of the youngest members of LINE and SINE classes of transposable elements. Importantly, this regulation is also implemented without involvement of germline-like biogenesis of piRNAs. CONCLUSIONS Though further studies are warranted, these findings suggest that the conventional germline-like PIWI/piRNA pathway is lost in transition from germ cells to GCNIS cells.
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Liu X, Zheng J, Xue Y, Yu H, Gong W, Wang P, Li Z, Liu Y. PIWIL3/OIP5-AS1/miR-367-3p/CEBPA feedback loop regulates the biological behavior of glioma cells. Am J Cancer Res 2018; 8:1084-1105. [PMID: 29464001 PMCID: PMC5817112 DOI: 10.7150/thno.21740] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 11/02/2017] [Indexed: 12/26/2022] Open
Abstract
Rationale: PIWI-interacting RNAs (piRNAs), a class of newly discovered small RNA molecules that function by binding to the Argonaute protein family (i.e., the PIWIL protein subfamily), and long noncoding RNAs (lncRNA) are implicated in several cancers. However, the detailed roles of ncRNAs in glioma remain unclear. Methods: The expression of PIWIL3, piR-30188, OIP5-AS1, miR-367, CEBPA and TRAF4 were measured in glioma tissues and cells. The role of PIWIL3/OIP5-AS1/miR-367-3p/CEBPA feedback loop was evaluated in cell and animal models. The association of the above molecules was analyzed. Results: Over-expression of PIWIL3, piR-30188 and miR-367-3p or knockdown of OIP5-AS1 resulted in inhibition of glioma cells progression. Binding sites between piR-30188 and OIP5-AS1 as well as between OIP5-AS1 and miR-367-3p were confirmed by RNA immunoprecipitation and luciferase assays. OIP5-AS1 knockdown or miR-367-3p over-expression contributed to a decrease in CEBPA (CCAAT/enhancer binding protein alpha) protein. Furthermore, CEBPA was detected as a target of miR-367-3p and played an oncogenic role in glioma. Treatment with CEBPA and miR-367-3p resulted in the modulation of downstream TRAF4 (TNF receptor-associated factor 4). PIWIL3 was also a target of CEBPA, forming a positive feedback loop in the growth regulation of glioma cells. Significantly, knockdown of OIP5-AS1 combined with over-expression of PIWIL3 and miR-367-3p resulted in tumor regression and extended survival in vivo. Conclusion: These results identified a novel molecular pathway in glioma cells that may provide a potential innovative approach for tumor therapy.
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Gainetdinov IV, Kondratieva SA, Skvortsova YV, Zinovyeva MV, Stukacheva EA, Klimov A, Tryakin AA, Azhikina TL. Distinguishing epigenetic features of preneoplastic testis tissues adjacent to seminomas and nonseminomas. Oncotarget 2017; 7:22439-47. [PMID: 26843623 PMCID: PMC5008371 DOI: 10.18632/oncotarget.7074] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 01/12/2016] [Indexed: 01/02/2023] Open
Abstract
PIWI pathway proteins are expressed during spermatogenesis where they play a key role in germ cell development. Epigenetic loss of PIWI proteins expression was previously demonstrated in testicular germ cell tumors (TGCTs), implying their involvement in TGCT development. In this work, apart from studying only normal testis and TGCT samples, we also analyzed an intermediate stage, i.e. preneoplastic testis tissues adjacent to TGCTs. Importantly, in this study, we minimized the contribution of patient-to-patient heterogeneity by using matched preneoplastic/TGCT samples. Surprisingly, expression of germ cell marker DDX4 suggests that spermatogenesis is retained in premalignant testis tissues adjacent to nonseminoma, but not those adjacent to seminoma. Moreover, this pattern is followed by expression of PIWI pathway genes, which impacts one of their functions: DNA methylation level over LINE-1 promoters is higher in preneoplastic testis tissues adjacent to nonseminomas than those adjacent to seminomas. This finding might imply distinct routes for development of the two types of TGCTs and could be used as a novel diagnostic marker, possibly, noninvasively. Finally, we studied the role of CpG island methylation in expression of PIWI genes in patient samples and using in vitro experiments in cell line models: a more complex interrelation between DNA methylation and expression of the corresponding genes was revealed.
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Affiliation(s)
- Ildar V Gainetdinov
- Department of Genetics and Postgenomic Technologies, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Sofia A Kondratieva
- Department of Genetics and Postgenomic Technologies, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Yulia V Skvortsova
- Department of Genetics and Postgenomic Technologies, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Marina V Zinovyeva
- Department of Genetics and Postgenomic Technologies, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Elena A Stukacheva
- Department of Genetics and Postgenomic Technologies, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Alexey Klimov
- Department of Oncology, Blokhin Russian Cancer Research Center, Moscow, Russia
| | - Alexey A Tryakin
- Department of Clinical Pharmacology and Chemotherapy, Blokhin Russian Cancer Research Center, Moscow, Russia
| | - Tatyana L Azhikina
- Department of Genetics and Postgenomic Technologies, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
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63
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Park YK, Jung WY, Park MG, Song SK, Lee YS, Heo H, Kim S. Bioimaging of multiple piRNAs in a single breast cancer cell using molecular beacons. MEDCHEMCOMM 2017; 8:2228-2232. [PMID: 30108737 PMCID: PMC6072429 DOI: 10.1039/c7md00515f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 10/23/2017] [Indexed: 12/14/2022]
Abstract
Simultaneous bioimaging of piR-36026 and piR-36743 using molecular beacons successfully visualized 4 different subtypes of breast cancer.
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Affiliation(s)
- Yong Keun Park
- Department of Surgery , Catholic Kwandong University International St. Mary's Hospital , Incheon Metropolitan City , 404-834 , Republic of Korea
| | - Woon Yong Jung
- Department of Pathology , Catholic Kwandong University International St. Mary's Hospital , Incheon Metropolitan City , 404-834 , Republic of Korea
| | - Min Geun Park
- Department of Surgery , Catholic Kwandong University International St. Mary's Hospital , Incheon Metropolitan City , 404-834 , Republic of Korea
| | - Sung Kyu Song
- Department of Surgery , Catholic Kwandong University International St. Mary's Hospital , Incheon Metropolitan City , 404-834 , Republic of Korea
| | - Yong Seung Lee
- Institute for Bio-Medical Convergence , College of Medicine , Catholic Kwandong University , Gangneung-si , Gangwon-do 270-701 , Republic of Korea . ; Tel: +82 32 290 2771
- Catholic Kwandong University International St. Mary's Hospital , Incheon Metropolitan City , 404-834 , Republic of Korea
| | - Hyejung Heo
- Institute for Bio-Medical Convergence , College of Medicine , Catholic Kwandong University , Gangneung-si , Gangwon-do 270-701 , Republic of Korea . ; Tel: +82 32 290 2771
- Catholic Kwandong University International St. Mary's Hospital , Incheon Metropolitan City , 404-834 , Republic of Korea
| | - Soonhag Kim
- Institute for Bio-Medical Convergence , College of Medicine , Catholic Kwandong University , Gangneung-si , Gangwon-do 270-701 , Republic of Korea . ; Tel: +82 32 290 2771
- Catholic Kwandong University International St. Mary's Hospital , Incheon Metropolitan City , 404-834 , Republic of Korea
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Zhang SJ, Yao J, Shen BZ, Li GB, Kong SS, Bi DD, Pan SH, Cheng BL. Role of piwi-interacting RNA-651 in the carcinogenesis of non-small cell lung cancer. Oncol Lett 2017; 15:940-946. [PMID: 29399156 PMCID: PMC5772788 DOI: 10.3892/ol.2017.7406] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 05/04/2017] [Indexed: 12/28/2022] Open
Abstract
Piwi-interacting RNAs (piRNAs/piRs) are small non-coding RNAs that can serve important roles in genome stability by silencing transposable genetic elements. piR651, one of these novel piRNAs, regulates a number of biological functions, as well as carcinogenesis. Previous studies have reported that piR651 is overexpressed in human gastric cancer tissues and in several cancer cell lines, including non-small cell lung cancer (NSCLC) cell lines. However, the role of piRNAs in carcinogenesis has not been clearly defined. In the present study, a small interfering RNA inhibitor of piR651 was transfected into the NSCLC A549 and HCC827 cell lines to evaluate the effect of piR651 on cell growth. The association between piR651 expression and apoptosis was evaluated by flow cytometry and western blot analysis. Wound-healing and Transwell migration and invasion assays were used to determine the effect of piR651 on the migration and invasion of NSCLC cell lines. The results revealed that inhibition of piR651 inhibited cell proliferation and significantly increased the apoptotic rate compared with the negative control (NC), as well as altering the expression of apoptosis-associated proteins. There were fewer migrating and invading cells in the piR651-inhibited group than in the NC group in the Transwell assays. Furthermore, in the wound-healing assay, the wound remained wider in the piR651 inhibitor group, suggesting decreased cell migration compared with that in the NC group. The results of the present study demonstrate that piR651 potentially regulates NSCLC tumorigenic behavior by inhibiting cell proliferation, migration and invasion and by inducing apoptosis. Therefore, piR651 is a potential cancer diagnosis marker.
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Affiliation(s)
- Shu-Jun Zhang
- Department of Pathology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Jie Yao
- Department of Traditional Chinese Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Bao-Zhong Shen
- Department of Medical Imaging, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Guang-Bo Li
- Department of Traditional Chinese Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Shan-Shan Kong
- Department of Traditional Chinese Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Dan-Dan Bi
- Department of Pathology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Shang-Ha Pan
- Hepatosplenic Surgery Center, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
| | - Bing-Lin Cheng
- Department of Traditional Chinese Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China
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65
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Henaoui IS, Jacovetti C, Guerra Mollet I, Guay C, Sobel J, Eliasson L, Regazzi R. PIWI-interacting RNAs as novel regulators of pancreatic beta cell function. Diabetologia 2017; 60:1977-1986. [PMID: 28711973 DOI: 10.1007/s00125-017-4368-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 06/01/2017] [Indexed: 12/31/2022]
Abstract
AIMS/HYPOTHESIS P-element induced Wimpy testis (PIWI)-interacting RNAs (piRNAs) are small non-coding RNAs that interact with PIWI proteins and guide them to silence transposable elements. They are abundantly expressed in germline cells and play key roles in spermatogenesis. There is mounting evidence that piRNAs are also present in somatic cells, where they may accomplish additional regulatory tasks. The aim of this study was to identify the piRNAs expressed in pancreatic islets and to determine whether they are involved in the control of beta cell activities. METHODS piRNA profiling of rat pancreatic islets was performed by microarray analysis. The functions of piRNAs were investigated by silencing the two main Piwi genes or by modulating the level of selected piRNAs in islet cells. RESULTS We detected about 18,000 piRNAs in rat pancreatic islets, many of which were differentially expressed throughout islet postnatal development. Moreover, we identified changes in the level of several piRNAs in the islets of Goto-Kakizaki rats, a well-established animal model of type 2 diabetes. Silencing of Piwil2 or Piwil4 genes in adult rat islets caused a reduction in the level of several piRNAs and resulted in defective insulin secretion and increased resistance of the cells to cytokine-induced cell death. Furthermore, overexpression in the islets of control animals of two piRNAs that are upregulated in diabetic rats led to a selective defect in glucose-induced insulin release. CONCLUSIONS/INTERPRETATION Our results provide evidence for a role of PIWI proteins and their associated piRNAs in the control of beta cell functions, and suggest a possible involvement in the development of type 2 diabetes. DATA AVAILABILITY Data have been deposited in Gene Expression Omnibus repository under the accession number GSE93792. Data can be accessed via the following link: https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?token=ojklueugdzehpkv&acc=GSE93792.
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Affiliation(s)
- Imène Sarah Henaoui
- Department of Fundamental Neurosciences, University of Lausanne, Rue du Bugnon 9, CH-1005, Lausanne, Switzerland
| | - Cécile Jacovetti
- Department of Fundamental Neurosciences, University of Lausanne, Rue du Bugnon 9, CH-1005, Lausanne, Switzerland
| | - Inês Guerra Mollet
- Department of Clinical Sciences-Malmö, Lund University Diabetes Centre, Lund University, Clinical Research Centre, SUS, Malmö, Sweden
| | - Claudiane Guay
- Department of Fundamental Neurosciences, University of Lausanne, Rue du Bugnon 9, CH-1005, Lausanne, Switzerland
| | - Jonathan Sobel
- Department of Fundamental Neurosciences, University of Lausanne, Rue du Bugnon 9, CH-1005, Lausanne, Switzerland
| | - Lena Eliasson
- Department of Clinical Sciences-Malmö, Lund University Diabetes Centre, Lund University, Clinical Research Centre, SUS, Malmö, Sweden
| | - Romano Regazzi
- Department of Fundamental Neurosciences, University of Lausanne, Rue du Bugnon 9, CH-1005, Lausanne, Switzerland.
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66
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Wang X, Sun S, Tong X, Ma Q, Di H, Fu T, Sun Z, Cai Y, Fan W, Wu Q, Li Y, Wang Q, Wang J. MiRNA-154-5p inhibits cell proliferation and metastasis by targeting PIWIL1 in glioblastoma. Brain Res 2017; 1676:69-76. [PMID: 28842123 DOI: 10.1016/j.brainres.2017.08.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Revised: 07/25/2017] [Accepted: 08/11/2017] [Indexed: 11/19/2022]
Abstract
MicroRNAs (miRNAs) play a critical role in glioblastoma initiation and progression. PIWIL1, a human homolog of the PIWI family, has a critical effect on glioblastoma progression. In present study, we found that the expression of miR-154-5p was significantly lower in glioblastoma. Our results suggested that the overexpression of miR-154-5p suppressed proliferation and metastasis, induced apoptosis, whereas inhibiting the expression of miR-154-5p significantly promoted proliferation and metastasis of glioblastoma. We further proved that miR-154-5p directly integrated with the 3'-UTR of PIWIL1 and reintroduction of PIWIL1 can rescue the phenotype changes induced by miR-154-5p. Taken together, our study reveals that miR-154-5p can counteract the malignant phenotypes of glioblastoma by targeting PIWIL1, which might be beneficial to reveal new therapeutic targets for glioblastoma.
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Affiliation(s)
- Xiuyu Wang
- Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases, Tianjin Neurosurgical Institute, Department of Neurosurgery, Tianjin Huanhu Hospital, Tianjin 300350, China; The Graduate School, Tianjin Medical University, Tianjin 300070, China.
| | - Shupeng Sun
- Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases, Tianjin Neurosurgical Institute, Department of Neurosurgery, Tianjin Huanhu Hospital, Tianjin 300350, China.
| | - Xiaoguang Tong
- Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases, Tianjin Neurosurgical Institute, Department of Neurosurgery, Tianjin Huanhu Hospital, Tianjin 300350, China.
| | - Quanfeng Ma
- Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases, Tianjin Neurosurgical Institute, Department of Neurosurgery, Tianjin Huanhu Hospital, Tianjin 300350, China; The Graduate School, Tianjin Medical University, Tianjin 300070, China.
| | - Hui Di
- Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases, Tianjin Neurosurgical Institute, Department of Neurosurgery, Tianjin Huanhu Hospital, Tianjin 300350, China; Department of Neurosurgery, Affiliated Hospital of Hebei University, Baoding 071000, China.
| | - Tao Fu
- The Graduate School, Tianjin Medical University, Tianjin 300070, China.
| | - Zhen Sun
- The Graduate School, Tianjin Medical University, Tianjin 300070, China.
| | - Ying Cai
- Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases, Tianjin Neurosurgical Institute, Department of Neurosurgery, Tianjin Huanhu Hospital, Tianjin 300350, China.
| | - Weijia Fan
- Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases, Tianjin Neurosurgical Institute, Department of Neurosurgery, Tianjin Huanhu Hospital, Tianjin 300350, China.
| | - Qiaoli Wu
- Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases, Tianjin Neurosurgical Institute, Department of Neurosurgery, Tianjin Huanhu Hospital, Tianjin 300350, China.
| | - Yidi Li
- Department of laboratory, Tianjin Medical University, Tianjin 300070, China.
| | - Qiong Wang
- Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases, Tianjin Neurosurgical Institute, Department of Neurosurgery, Tianjin Huanhu Hospital, Tianjin 300350, China.
| | - Jinhuan Wang
- Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases, Tianjin Neurosurgical Institute, Department of Neurosurgery, Tianjin Huanhu Hospital, Tianjin 300350, China.
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67
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Hempfling AL, Lim SL, Adelson DL, Evans J, O'Connor AE, Qu ZP, Kliesch S, Weidner W, O'Bryan MK, Bergmann M. Expression patterns of HENMT1 and PIWIL1 in human testis: implications for transposon expression. Reproduction 2017; 154:363-374. [PMID: 28676534 DOI: 10.1530/rep-16-0586] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 06/08/2017] [Accepted: 07/04/2017] [Indexed: 12/20/2022]
Abstract
This study aimed to define the expression patterns of HENMT1 and PIWI proteins in human testis and investigate their association with transposon expression, infertility sub-type or development of testicular germ cell tumours (TGCTs). Testis biopsies showing normal spermatogenesis were used to identify normal localisation patterns of HENMT1 and PIWIL1 by immunolocalisation and RT-PCR after laser microdissection. 222 testis biopsies representing normal spermatogenesis, hypospermatogenesis, spermatogenic arrests, Sertoli cell-only (SCO) tumours and TGCTs were analysed by RT-qPCR for expression of HENMT1/PIWIL1/PIWIL2/PIWIL3/PIWIL4 and LINE-1 Additionally, HENMT1-overexpressing TCam2 seminoma cell lines were analysed for the same parameters by RT-qPCR. We found that HENMT1 and PIWIL1 are coexpressed in pachytene spermatocytes and spermatids. Expression of HENMT1, PIWIL1 and PIWIL2 was mainly dependent on germ cell content but low levels of expression were also detected in some SCO samples. Levels of HENMT1, PIWIL1 and PIWIL2 expression were low in TGCT. Samples with HENMT1, PIWIL2 and PIWIL4 expression showed significantly (P < 0.05) lower transposon expression compared to samples without expression in the same histological group. HENMT1-overexpressing TCam2 cells showed lower LINE-1 expression than empty vector-transfected control lines. Our findings support that the transposon-regulating function of the piRNA pathway found in the mouse is conserved in adult human testis. HENMT1 and PIWI proteins are expressed in a germ-cell-specific manner and required for transposon control.
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Affiliation(s)
- A L Hempfling
- The Development and Stem Cells Program of the Monash Biomedicine Discovery Institute and The Department of Anatomy and Developmental BiologyMonash University Clayton, Clayton, Australia .,Institute for Veterinary AnatomyHistology and Embryology, Justus Liebig University, Giessen, Germany
| | - S L Lim
- The Development and Stem Cells Program of the Monash Biomedicine Discovery Institute and The Department of Anatomy and Developmental BiologyMonash University Clayton, Clayton, Australia
| | - D L Adelson
- School of Biological SciencesThe University of Adelaide, Adelaide, Australia
| | - J Evans
- Centre for Reproductive HealthHudson Institute of Medical Research, Clayton, Australia
| | - A E O'Connor
- The Development and Stem Cells Program of the Monash Biomedicine Discovery Institute and The Department of Anatomy and Developmental BiologyMonash University Clayton, Clayton, Australia
| | - Z P Qu
- School of Biological SciencesThe University of Adelaide, Adelaide, Australia
| | - S Kliesch
- Centre of Reproductive Medicine and AndrologyMuenster, Germany
| | - W Weidner
- Clinic for UrologyPediatric Urology and Andrology, Justus-Liebig-University, Giessen, Germany
| | - M K O'Bryan
- The Development and Stem Cells Program of the Monash Biomedicine Discovery Institute and The Department of Anatomy and Developmental BiologyMonash University Clayton, Clayton, Australia.,The School of Biological SciencesMonash University, Clayton, Australia
| | - M Bergmann
- Institute for Veterinary AnatomyHistology and Embryology, Justus Liebig University, Giessen, Germany
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68
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Hili Inhibits HIV Replication in Activated T Cells. J Virol 2017; 91:JVI.00237-17. [PMID: 28331090 DOI: 10.1128/jvi.00237-17] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 03/02/2017] [Indexed: 02/06/2023] Open
Abstract
P-element-induced wimpy-like (Piwil) proteins restrict the replication of mobile genetic elements in the germ line. They are also expressed in many transformed cell lines. In this study, we discovered that the human Piwil 2 (Hili) protein can also inhibit HIV replication, especially in activated CD4+ T cells that are the preferred target cells for this virus in the infected host. Although resting cells did not express Hili, its expression was rapidly induced following T cell activation. In these cells and transformed cell lines, depletion of Hili increased levels of viral proteins and new viral particles. Further studies revealed that Hili binds to tRNA. Some of the tRNAs represent rare tRNA species, whose codons are overrepresented in the viral genome. Targeting tRNAArg(UCU) with an antisense oligonucleotide replicated effects of Hili and also inhibited HIV replication. Finally, Hili also inhibited the retrotransposition of the endogenous intracysternal A particle (IAP) by a similar mechanism. Thus, Hili joins a list of host proteins that inhibit the replication of HIV and other mobile genetic elements.IMPORTANCE Piwil proteins inhibit the movement of mobile genetic elements in the germ line. In their absence, sperm does not form and male mice are sterile. This inhibition is thought to occur via small Piwi-interacting RNAs (piRNAs). However, in some species and in human somatic cells, Piwil proteins bind primarily to tRNA. In this report, we demonstrate that human Piwil proteins, especially Hili, not only bind to select tRNA species, including rare tRNAs, but also inhibit HIV replication. Importantly, T cell activation induces the expression of Hili in CD4+ T cells. Since Hili also inhibited the movement of an endogenous retrovirus (IAP), our finding shed new light on this intracellular resistance to exogenous and endogenous retroviruses as well as other mobile genetic elements.
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69
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HILI destabilizes microtubules by suppressing phosphorylation and Gigaxonin-mediated degradation of TBCB. Sci Rep 2017; 7:46376. [PMID: 28393858 PMCID: PMC5385498 DOI: 10.1038/srep46376] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 03/15/2017] [Indexed: 02/05/2023] Open
Abstract
Human PIWIL2, aka HILI, is a member of PIWI protein family and overexpresses in various tumors. However, the underlying mechanisms of HILI in tumorigenesis remain largely unknown. TBCB has a critical role in regulating microtubule dynamics and is overexpressed in many cancers. Here we report that HILI inhibits Gigaxonin-mediated TBCB ubiquitination and degradation by interacting with TBCB, promoting the binding between HSP90 and TBCB, and suppressing the interaction between Gigaxonin and TBCB. Meanwhile, HILI can also reduce phosphorylation level of TBCB induced by PAK1. Our results showed that HILI suppresses microtubule polymerization and promotes cell proliferation, migration and invasion via TBCB for the first time, revealing a novel mechanism for HILI in tumorigenesis.
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70
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Litwin M, Szczepańska-Buda A, Piotrowska A, Dzięgiel P, Witkiewicz W. The meaning of PIWI proteins in cancer development. Oncol Lett 2017; 13:3354-3362. [PMID: 28529570 PMCID: PMC5431467 DOI: 10.3892/ol.2017.5932] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 02/01/2017] [Indexed: 12/13/2022] Open
Abstract
Cancer is a histologically and genetically heterogeneous population of tumor cells that exhibits distinct molecular profiles determined by epigenetic alterations. P-element-induced wimpy testis (PIWI) proteins in complex with PIWI-interacting RNA (piRNA) have been previously demonstrated to be involved in epigenetic regulation in germline cells. Recently, reactivation of PIWI expression, primarily PIWI-like protein 1 and 2, through aberrant DNA methylation resulting in genomic silencing has been identified in various types of tumors. It has been suggested that the PIWI-piRNA complex contributes to cancer development and progression by promoting a stem-like state of cancer cells, or cancer stem cells (CSCs). It has been identified that CSCs represent the cells that have undergone epithelial-mesenchymal transition (EMT) and acquired metastatic capacities. However, the molecular association between the EMT process and the stem-cell state remains unclear. Further extensive characterization of CSCs in individual types of tumors is required to identify specific markers for the heterogeneous population of CSCs and therefore selectively target CSCs. Previous studies indicate a reciprocal regulation between PIWI proteins and a complex signaling network linking markers characterized for CSCs and transcription factors involved in EMT. In the present review, studies of PIWI function are summarized, and the potential involvement of PIWI proteins in cancer development and progression is discussed.
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Affiliation(s)
- Monika Litwin
- Research and Development Centre, Regional Specialist Hospital in Wrocław, Poland.,Research and Development Centre Novasome Sp. z o.o., 51-423 Wrocław, Poland
| | - Anna Szczepańska-Buda
- Research and Development Centre, Regional Specialist Hospital in Wrocław, Poland.,Research and Development Centre Novasome Sp. z o.o., 51-423 Wrocław, Poland
| | - Aleksandra Piotrowska
- Department of Histology and Embryology, Wrocław Medical University, 50-368 Wrocław, Poland
| | - Piotr Dzięgiel
- Department of Histology and Embryology, Wrocław Medical University, 50-368 Wrocław, Poland.,Department of Physiotherapy and Occupational Therapy in Conservative and Interventional Medicine, 51-612 Wrocław, Poland
| | - Wojciech Witkiewicz
- Research and Development Centre, Regional Specialist Hospital in Wrocław, Poland
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Gambichler T, Kohsik C, Höh AK, Lang K, Käfferlein HU, Brüning T, Stockfleth E, Stücker M, Dreißigacker M, Sand M. Expression of PIWIL3 in primary and metastatic melanoma. J Cancer Res Clin Oncol 2017; 143:433-437. [PMID: 27858163 DOI: 10.1007/s00432-016-2305-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 11/07/2016] [Indexed: 01/14/2023]
Abstract
PURPOSE The PIWI-interacting RNA machinery in malignant melanoma (MM) has not been sufficiently studied. We aimed to investigate the PIWIL3 expression profiles in primary melanomas and metastases of MM including a correlation with clinical data. METHODS We studied 161 primary melanomas, 45 lymph node metastases, and 16 distant metastases of 183 patients with MM. We used immunohistochemistry to assess PIWIL3 protein expression in situ. The relationship between the immunoreactivity of PIWIL3 and clinical data was statistically evaluated. RESULTS We observed a significantly (P = 0.000059) higher median immunoreactivity score in primary melanomas (4.9; range, 0.1-6), lymph node metastases (5.1; range, 3.3-6), and distant metastases (5.6; range, 4.5-6). PIWIL3 was expressed significantly higher (P = 0.0002) in primary nodular melanomas and acral melanomas (5.2; range, 3.4-6) when compared to other melanoma subtypes (4.7; range, 0.1-6). On univariate analysis, a significant positive correlation was observed between primary melanoma PIWIL3 expression and tumor thickness (r = 0.2; P = 0.014). On univariate and multivariate analysis, PIWIL3 did not prove to be an independent predictor for melanoma relapse or death. CONCLUSIONS Our data indicate that PIWIL3 protein expression is elevated in more aggressive primary MM and metastatic disease. As also observed in other malignancies, PIWIL3 seems to play a role in MM progression.
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Affiliation(s)
- Thilo Gambichler
- Skin Cancer Center of the Department of Dermatology, Ruhr-University Bochum, St. Josef Hospital, Gudrunstr. 56, 44791, Bochum, Germany.
| | - Christina Kohsik
- Skin Cancer Center of the Department of Dermatology, Ruhr-University Bochum, St. Josef Hospital, Gudrunstr. 56, 44791, Bochum, Germany
| | - Ann-Kathrin Höh
- Skin Cancer Center of the Department of Dermatology, Ruhr-University Bochum, St. Josef Hospital, Gudrunstr. 56, 44791, Bochum, Germany
| | - Kerstin Lang
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bürkle-de-la-Camp Platz 1, 44789, Bochum, Germany
| | - Heiko U Käfferlein
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bürkle-de-la-Camp Platz 1, 44789, Bochum, Germany
| | - Thomas Brüning
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bürkle-de-la-Camp Platz 1, 44789, Bochum, Germany
| | - Eggert Stockfleth
- Skin Cancer Center of the Department of Dermatology, Ruhr-University Bochum, St. Josef Hospital, Gudrunstr. 56, 44791, Bochum, Germany
| | - Markus Stücker
- Skin Cancer Center of the Department of Dermatology, Ruhr-University Bochum, St. Josef Hospital, Gudrunstr. 56, 44791, Bochum, Germany
| | - Max Dreißigacker
- Skin Cancer Center of the Department of Dermatology, Ruhr-University Bochum, St. Josef Hospital, Gudrunstr. 56, 44791, Bochum, Germany
| | - Michael Sand
- Skin Cancer Center of the Department of Dermatology, Ruhr-University Bochum, St. Josef Hospital, Gudrunstr. 56, 44791, Bochum, Germany
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Sivagurunathan S, Palanisamy K, Arunachalam JP, Chidambaram S. Possible role of HIWI2 in modulating tight junction proteins in retinal pigment epithelial cells through Akt signaling pathway. Mol Cell Biochem 2016; 427:145-156. [DOI: 10.1007/s11010-016-2906-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Accepted: 12/03/2016] [Indexed: 12/22/2022]
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PIWIL1 destabilizes microtubule by suppressing phosphorylation at Ser16 and RLIM-mediated degradation of Stathmin1. Oncotarget 2016; 6:27794-804. [PMID: 26317901 PMCID: PMC4695026 DOI: 10.18632/oncotarget.4533] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 07/03/2015] [Indexed: 02/05/2023] Open
Abstract
Human PIWIL1, alias HIWI, is a member of Piwi protein family and expressed in various tumors. However, the underlying mechanism of PIWIL1 in tumorigenesis remains largely unknown. Stathmin1 is a cytosolic phosphoprotein which has a critical role in regulating microtubule dynamics and is overexpressed in many cancers. Here we report that PIWIL1 can directly bind to Stathmin1. Meanwhile, PIWIL1 can up-regulate the expression of Stathmin1 through inhibiting ubiquitin-mediated degradation induced by an E3 ubiquitin ligase RLIM. Furthermore, PIWIL1 can also reduce phosphorylation level of Stathmin1 at Ser-16 through inhibiting the interaction between CaMKII and Stathmin1. Our results showed that PIWIL1 suppresses microtubule polymerization, and promotes cell proliferation and migration via Stathmin1 for the first time. Our study reveals a novel mechanism for PIWIL1 in tumorigenesis.
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74
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Liu Y. MicroRNAs and PIWI-interacting RNAs in oncology. Oncol Lett 2016; 12:2289-2292. [PMID: 27698791 PMCID: PMC5038388 DOI: 10.3892/ol.2016.4996] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 07/28/2016] [Indexed: 12/19/2022] Open
Abstract
RNA molecules that are unable to translate into proteins are classified as non-coding RNA. Non-coding RNA (ncRNA) genes include highly abundant and functionally important RNAs such as transfer RNAs, microRNAs (miRNAs), siRNAs, snRNAs, exRNAs and piRNAs. The number of ncRNAs encoded within the human genome is unknown; however, recent transcriptomic and bioinformatic studies suggest the existence of thousands of ncRNAs. Furthermore, small ncRNAs, including miRNAs and PIWI-interacting RNAs (piRNAs), play an imperative role in the regulation of gene expression of numerous biological and pathological processes. Investigation into the expression and function of small RNA in cancer cells has contributed to gaining a greater understanding of the roles of small RNAs in carcinogenesis. The present review is aimed primarily to discuss the importance of the expression and functions of these small RNAs in carcinogenesis. These studies may provide useful information for future therapies in cancer.
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Affiliation(s)
- Yong Liu
- Department of Neurology, Xuzhou Central Hospital, The Affiliated Xuzhou Hospital of Medical College of Southeast University, Xuzhou, Jiangsu 221009, P.R. China
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75
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Navarro A, Tejero R, Viñolas N, Cordeiro A, Marrades RM, Fuster D, Caritg O, Moises J, Muñoz C, Molins L, Ramirez J, Monzo M. The significance of PIWI family expression in human lung embryogenesis and non-small cell lung cancer. Oncotarget 2016; 6:31544-56. [PMID: 25742785 PMCID: PMC4741623 DOI: 10.18632/oncotarget.3003] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 12/21/2014] [Indexed: 12/12/2022] Open
Abstract
The expression of Piwi-interacting RNAs, small RNAs that bind to PIWI proteins, was until recently believed to be limited to germinal stem cells. We have studied the expression of PIWI genes during human lung embryogenesis and in paired tumor and normal tissue prospectively collected from 71 resected non-small-cell lung cancer patients. The mRNA expression analysis showed that PIWIL1 was highly expressed in 7-week embryos and downregulated during the subsequent weeks of development. PIWIL1 was expressed in 11 of the tumor samples but in none of the normal tissue samples. These results were validated by immunohistochemistry, showing faint cytoplasmic reactivity in the PIWIL1-positive samples. Interestingly, the patients expressing PIWIL1 had a shorter time to relapse (TTR) (p = 0.006) and overall survival (OS) (p = 0.0076) than those without PIWIL1 expression. PIWIL2 and 4 were downregulated in tumor tissue in comparison to the normal tissue (p < 0.001) and the patients with lower levels of PIWIL4 had shorter TTR (p = 0.048) and OS (p = 0.033). In the multivariate analysis, PIWIL1 expression emerged as an independent prognostic marker. Using 5-Aza-dC treatment and bisulfite sequencing, we observed that PIWIL1 expression could be regulated in part by methylation. Finally, an in silico study identified a stem-cell expression signature associated with PIWIL1 expression.
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Affiliation(s)
- Alfons Navarro
- Molecular Oncology and Embryology Laboratory, Human Anatomy Unit, School of Medicine, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Rut Tejero
- Molecular Oncology and Embryology Laboratory, Human Anatomy Unit, School of Medicine, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Nuria Viñolas
- Department of Medical Oncology, Institut Clinic Malalties Hemato-Oncològiques (ICMHO), Hospital Clinic de Barcelona, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Anna Cordeiro
- Molecular Oncology and Embryology Laboratory, Human Anatomy Unit, School of Medicine, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Ramon M Marrades
- Department of Pneumology, Institut Clínic del Tórax (ICT), Hospital Clinic de Barcelona, University of Barcelona, IDIBAPS, CIBER de Enfermedades Respiratorias (CIBERES), Barcelona, Spain
| | - Dolors Fuster
- Molecular Oncology and Embryology Laboratory, Human Anatomy Unit, School of Medicine, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Oriol Caritg
- Molecular Oncology and Embryology Laboratory, Human Anatomy Unit, School of Medicine, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Jorge Moises
- Department of Pneumology, Institut Clínic del Tórax (ICT), Hospital Clinic de Barcelona, University of Barcelona, IDIBAPS, CIBER de Enfermedades Respiratorias (CIBERES), Barcelona, Spain
| | - Carmen Muñoz
- Molecular Oncology and Embryology Laboratory, Human Anatomy Unit, School of Medicine, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Laureano Molins
- Department of Thoracic Surgery, Institut Clínic del Tórax (ICT), Hospital Clinic de Barcelona, University of Barcelona, Barcelona, Spain
| | - Josep Ramirez
- Department of Pathology, Centro de Diagnóstico Biomédico (CDB), Hospital Clinic de Barcelona, University of Barcelona, IDIBAPS, CIBERES, Barcelona, Spain
| | - Mariano Monzo
- Molecular Oncology and Embryology Laboratory, Human Anatomy Unit, School of Medicine, University of Barcelona, IDIBAPS, Barcelona, Spain
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76
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Bracht JR, Wang X, Shetty K, Chen X, Uttarotai GJ, Callihan EC, McCloud SS, Clay DM, Wang J, Nowacki M, Landweber LF. Chromosome fusions triggered by noncoding RNA. RNA Biol 2016; 14:620-631. [PMID: 27267579 PMCID: PMC5449082 DOI: 10.1080/15476286.2016.1195940] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Chromosomal fusions are common in normal and cancer cells and can produce aberrant gene products that promote transformation. The mechanisms driving these fusions are poorly understood, but recurrent fusions are widespread. This suggests an underlying mechanism, and some authors have proposed a possible role for RNA in this process. The unicellular eukaryote Oxytricha trifallax displays an exorbitant capacity for natural genome editing, when it rewrites its germline genome to form a somatic epigenome. This developmental process provides a powerful model system to directly test the influence of small noncoding RNAs on chromosome fusion events during somatic differentiation. Here we show that small RNAs are capable of inducing chromosome fusions in 4 distinct cases (out of 4 tested), including one fusion of 3 chromosomes. We further show that these RNA-mediated chromosome fusions are heritable over multiple sexual generations and that transmission of the acquired fusion is associated with endogenous production of novel piRNA molecules that target the fused junction. We also demonstrate the capacity of a long noncoding RNA (lncRNA) to induce chromosome fusion of 2 distal germline loci. These results underscore the ability of short-lived, aberrant RNAs to act as drivers of chromosome fusion events that can be stably transmitted to future generations.
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Affiliation(s)
- John R Bracht
- a Department of Biology , American University , Washington, DC , USA
| | - Xing Wang
- b Department of Chemistry & Chemical Biology , Rensselaer Polytechnic Institute Troy , NY , USA
| | - Keerthi Shetty
- c Department of Molecular Biology , Princeton University , Princeton , NJ , USA.,d Department of Immunobiology , Yale University , New Haven , CT , USA
| | - Xiao Chen
- c Department of Molecular Biology , Princeton University , Princeton , NJ , USA
| | - Grace J Uttarotai
- a Department of Biology , American University , Washington, DC , USA
| | - Evan C Callihan
- a Department of Biology , American University , Washington, DC , USA
| | - Sierra S McCloud
- c Department of Molecular Biology , Princeton University , Princeton , NJ , USA
| | - Derek M Clay
- c Department of Molecular Biology , Princeton University , Princeton , NJ , USA
| | - Jingmei Wang
- e Department of Ecology & Evolutionary Biology , Princeton University , NJ , USA
| | - Mariusz Nowacki
- f Institute of Cell Biology, University of Bern , Switzerland
| | - Laura F Landweber
- e Department of Ecology & Evolutionary Biology , Princeton University , NJ , USA.,g Departments of Biochemistry & Molecular Biophysics and Biological Sciences , Columbia University , NY , USA
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77
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Lee YJ, Moon SU, Park MG, Jung WY, Park YK, Song SK, Ryu JG, Lee YS, Heo HJ, Gu HN, Cho SJ, Ali BA, Al-Khedhairy AA, Lee I, Kim S. Multiplex bioimaging of piRNA molecular pathway-regulated theragnostic effects in a single breast cancer cell using a piRNA molecular beacon. Biomaterials 2016; 101:143-55. [PMID: 27289065 DOI: 10.1016/j.biomaterials.2016.05.052] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 05/18/2016] [Accepted: 05/24/2016] [Indexed: 12/17/2022]
Abstract
Recently, PIWI-interacting small non-coding RNAs (piRNAs) have emerged as novel cancer biomarkers candidate because of their high expression level in various cancer types and role in the control of tumor suppressor genes. In this study, a novel breast cancer theragnostics probe based on a single system targeting the piRNA-36026 (piR-36026) molecular pathway was developed using a piR-36026 molecular beacon (MB). The piR-36026 MB successfully visualized endogenous piR-36026 biogenesis, which is highly expressed in MCF7 cells (a human breast cancer cell line), and simultaneously inhibited piR-36026-mediated cancer progression in vitro and in vivo. We discovered two tumor suppressor proteins, SERPINA1 and LRAT, that were directly regulated as endogenous piR-36026 target genes in MCF7 cells. Furthermore, multiplex bioimaging of a single MCF7 cell following treatment with piR-36026 MB clearly visualized the direct molecular interaction of piRNA-36026 with SERPINA1 or LRAT and subsequent molecular therapeutic responses including caspase-3 and PI in the nucleus.
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Affiliation(s)
- Youn Jung Lee
- Institute for Bio-Medical Convergence, College of Medicine, Catholic Kwandong University, Gangneung-si, Gangwon-do, 270-701, Republic of Korea
| | - Sung Ung Moon
- Institute for Bio-Medical Convergence, College of Medicine, Catholic Kwandong University, Gangneung-si, Gangwon-do, 270-701, Republic of Korea
| | - Min Geun Park
- Department of Surgery, Catholic Kwandong University International St. Mary's Hospital, Incheon Metropolitan City, 404-834, Republic of Korea
| | - Woon Yong Jung
- Department of Pathology, Catholic Kwandong University International St. Mary's Hospital, Incheon Metropolitan City, 404-834, Republic of Korea
| | - Yong Keun Park
- Department of Surgery, Catholic Kwandong University International St. Mary's Hospital, Incheon Metropolitan City, 404-834, Republic of Korea
| | - Sung Kyu Song
- Department of Surgery, Catholic Kwandong University International St. Mary's Hospital, Incheon Metropolitan City, 404-834, Republic of Korea
| | - Je Gyu Ryu
- Department of Surgery, Catholic Kwandong University International St. Mary's Hospital, Incheon Metropolitan City, 404-834, Republic of Korea
| | - Yong Seung Lee
- Institute for Bio-Medical Convergence, College of Medicine, Catholic Kwandong University, Gangneung-si, Gangwon-do, 270-701, Republic of Korea
| | - Hye Jung Heo
- Institute for Bio-Medical Convergence, College of Medicine, Catholic Kwandong University, Gangneung-si, Gangwon-do, 270-701, Republic of Korea
| | - Ha Na Gu
- Institute for Bio-Medical Convergence, College of Medicine, Catholic Kwandong University, Gangneung-si, Gangwon-do, 270-701, Republic of Korea
| | - Su Jeong Cho
- Institute for Bio-Medical Convergence, College of Medicine, Catholic Kwandong University, Gangneung-si, Gangwon-do, 270-701, Republic of Korea
| | - Bahy A Ali
- Al-Jeraisy DNA Research Chair, Department of Zoology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia; Department of Nucleic Acids Research, Genetic Engineering and Biotechnology Research Institute, City for Scientific Research and Technological Applications, Alexandria, Egypt
| | - Abdulaziz A Al-Khedhairy
- Al-Jeraisy DNA Research Chair, Department of Zoology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Ilkyun Lee
- Department of Surgery, Catholic Kwandong University International St. Mary's Hospital, Incheon Metropolitan City, 404-834, Republic of Korea.
| | - Soonhag Kim
- Institute for Bio-Medical Convergence, College of Medicine, Catholic Kwandong University, Gangneung-si, Gangwon-do, 270-701, Republic of Korea; Catholic Kwandong University International St. Mary's Hospital, Incheon Metropolitan City, 404-834, Republic of Korea.
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78
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Kneitz S, Mishra RR, Chalopin D, Postlethwait J, Warren WC, Walter RB, Schartl M. Germ cell and tumor associated piRNAs in the medaka and Xiphophorus melanoma models. BMC Genomics 2016; 17:357. [PMID: 27183847 PMCID: PMC4869193 DOI: 10.1186/s12864-016-2697-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 05/06/2016] [Indexed: 11/10/2022] Open
Abstract
Background A growing number of studies report an abnormal expression of Piwi-interacting RNAs (piRNAs) and the piRNA processing enzyme Piwi in many cancers. Whether this finding is an epiphenomenon of the chaotic molecular biology of the fast dividing, neoplastically transformed cells or is functionally relevant to tumorigenesisis is difficult to discern at present. To better understand the role of piRNAs in cancer development small laboratory fish models can make a valuable contribution. However, little is known about piRNAs in somatic and neoplastic tissues of fish. Results To identify piRNA clusters that might be involved in melanoma pathogenesis, we use several transgenic lines of medaka, and platyfish/swordtail hybrids, which develop various types of melanoma. In these tumors Piwi, is expressed at different levels, depending on tumor type. To quantify piRNA levels, whole piRNA populations of testes and melanomas of different histotypes were sequenced. Because no reference piRNA cluster set for medaka or Xiphophorus was yet available we developed a software pipeline to detect piRNA clusters in our samples and clusters were selected that were enriched in one or more samples. We found several loci to be overexpressed or down-regulated in different melanoma subtypes as compared to hyperpigmented skin. Furthermore, cluster analysis revealed a clear distinction between testes, low-grade and high-grade malignant melanoma in medaka. Conclusions Our data imply that dysregulation of piRNA expression may be associated with development of melanoma. Our results also reinforce the importance of fish as a suitable model system to study the role of piRNAs in tumorigenesis. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-2697-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Susanne Kneitz
- Physiological Chemistry I, Biocenter, University of Würzburg, Am Hubland, 97074, Würzburg, Germany.
| | - Rasmi R Mishra
- Physiological Chemistry I, Biocenter, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | | | - John Postlethwait
- Institute of Neuroscience, University of Oregon, 1425 E. 13th Avenue, Eugene, OR, 97403, USA
| | - Wesley C Warren
- Genome Sequencing Center, Washington University School of Medicine, 4444 Forest Park Blvd., St Louis, MO, 63108, USA
| | - Ronald B Walter
- The Xiphophorus Genetic Stock Center, Department of Chemistry and Biochemistry, 419 Centennial Hall, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA
| | - Manfred Schartl
- Physiological Chemistry I, Biocenter, University of Würzburg, Am Hubland, 97074, Würzburg, Germany.,Comprehensive Cancer Center Mainfranken, University Clinic Würzburg, Josef Schneider Straße 6, D-97074, Würzburg, Germany.,Texas Institute for Advanced Study and Department of Biology, Texas A&M University, College Station, Texas, 77843, USA
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79
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Wang Z, Liu N, Shi S, Liu S, Lin H. The Role of PIWIL4, an Argonaute Family Protein, in Breast Cancer. J Biol Chem 2016; 291:10646-58. [PMID: 26957540 PMCID: PMC4865913 DOI: 10.1074/jbc.m116.723239] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 03/07/2016] [Indexed: 12/14/2022] Open
Abstract
P-element-induced wimpy testis (PIWI) proteins bind to PIWI-interacting RNAs and play key roles in the biogenesis and functions of PIWI-interacting RNAs. It has been reported that PIWI proteins are essential for stem cell self-renewal and germline development in diverse organisms and that they are ectopically expressed in multiple forms of cancer. However, the role of PIWI in cancer remains elusive. Here we report that one of the four PIWI proteins in humans, PIWIL4, is highly expressed in both breast cancer tissues and the cytoplasm of MDA-MB-231 cells derived from breast cancer. Reducing PIWIL4 expression drastically impairs the migration ability of MDA-MB-231 cells, significantly increases their apoptosis, and mildly affects their proliferation. Our transcriptome and proteome analysis reveal that these functions are at least partially achieved via the PIWIL4 regulation of TGF-β and FGF signaling pathways and MHC class II proteins. These findings suggest that PIWIL4 may serve as a potential therapeutic target for breast cancer.
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Affiliation(s)
- Zifeng Wang
- From the School of Life Science and Technology and Shanghai Institute of Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China and
| | - Na Liu
- the Yale Stem Cell Center and Department of Cell Biology, Yale University School of Medicine, New Haven, Connecticut 06520
| | - Shuo Shi
- Shanghai Institute of Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China and
| | - Sanhong Liu
- Shanghai Institute of Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China and
| | - Haifan Lin
- From the School of Life Science and Technology and Shanghai Institute of Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China and the Yale Stem Cell Center and Department of Cell Biology, Yale University School of Medicine, New Haven, Connecticut 06520
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80
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Zheng J, Liu X, Wang P, Xue Y, Ma J, Qu C, Liu Y. CRNDE Promotes Malignant Progression of Glioma by Attenuating miR-384/PIWIL4/STAT3 Axis. Mol Ther 2016; 24:1199-1215. [PMID: 27058823 DOI: 10.1038/mt.2016.71] [Citation(s) in RCA: 172] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 04/01/2016] [Indexed: 12/16/2022] Open
Abstract
Colorectal neoplasia differentially expressed (CRNDE) is the most upregulated long noncoding RNA (lncRNA) in glioma. Herein, the function and potential molecular mechanisms of CRNDE and miR-384 were illustrated in glioma cells. CRNDE overexpression facilitated cell proliferation, migration, and invasion, while inhibited glioma cells apoptosis. Quantitative real-time polymerase chain reaction (PCR) demonstrated that miR-384 was downregulated in human glioma tissues and glioma cell lines. Moreover, restoration of miR-384 exerted tumor-suppressive functions. In addition, the expression of miR-384 was negatively correlated with CRNDE expression. A binding region between CRNDE and miR-384 was confirmed using luciferase assays. Moreover, CRNDE promoted cell malignant behavior by decreasing miR-384 expression. At the molecular level, treatment by CRNDE knockdown or miR-384 overexpression resulted in a decrease of piwi-like RNA-mediated gene silencing 4 (PIWIL4) protein. Besides, PIWIL4 was identified as a target of miR-384 and plays an oncogenic role in glioma. Similarly, downstream proteins of PIWIL4 such as STAT3, cyclin D1, VEGFA, SLUG, MMP-9, caspase 3, Bcl-2, and bcl-xL were modulated when treated with miR-384 and PIWIL4. Remarkably, CRNDE knockdown combined with miR-384 overexpression led to tumor regression in vivo. Overall, these results depicted a novel pathway mediated by CRNDE in glioma, which may be a potential application for glioma therapy.
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Affiliation(s)
- Jian Zheng
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China.,Liaoning Research Center for Translational Medicine in Nervous System Disease, Shenyang, People's Republic of China
| | - Xiaobai Liu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China.,Liaoning Research Center for Translational Medicine in Nervous System Disease, Shenyang, People's Republic of China
| | - Ping Wang
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang, People's Republic of China.,Institute of Pathology and Pathophysiology, China Medical University, Shenyang, People's Republic of China
| | - Yixue Xue
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang, People's Republic of China.,Institute of Pathology and Pathophysiology, China Medical University, Shenyang, People's Republic of China
| | - Jun Ma
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang, People's Republic of China.,Institute of Pathology and Pathophysiology, China Medical University, Shenyang, People's Republic of China
| | - Chengbin Qu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China.,Liaoning Research Center for Translational Medicine in Nervous System Disease, Shenyang, People's Republic of China
| | - Yunhui Liu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China.,Liaoning Research Center for Translational Medicine in Nervous System Disease, Shenyang, People's Republic of China
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81
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Khan SY, Hackett SF, Riazuddin SA. Non-coding RNA profiling of the developing murine lens. Exp Eye Res 2016; 145:347-351. [PMID: 26808486 DOI: 10.1016/j.exer.2016.01.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 01/13/2016] [Indexed: 11/15/2022]
Abstract
Non-coding RNAs (ncRNAs) are emerging as an important player in the regulation of genome integrity and gene expression, and they have been implicated in the pathogenesis of many diseases. The aim of the present study is to identify the repertoire of ncRNAs expressed in the developing mouse lens. We previously reported the mouse lens transcriptome, including mRNA and microRNA (miRNA) profiling at two embryonic (E15 and E18) and four postnatal (P0, P3, P6, and P9) time points. We analyzed the data from small RNA-Seq and mRNA-Seq libraries to investigate the ncRNA profile. Our analysis revealed expression of 12 different classes of ncRNA in the murine lens at six developmental time points. Annotation of small RNA data showed expression of 1,756 antisense ncRNA (asncRNA) in the mouse lens transcriptome. Likewise, we identified 82 P-element-induced wimpy testis (PIWI)-interacting RNA (piRNA), 345 transfer RNA (tRNA), 12 small nuclear RNA (snRNA), 167 small nucleolar RNA (snoRNA), 19 small Cajal body-specific RNA (scaRNA), six ribosomal RNA (rRNA), 18 tRNA-like structures, one MALAT1-associated small cytoplasmic RNA (mascRNA), one Vault RNA (vtRNA), and one Y RNA expressed in the developing mouse lens. In parallel, bioinformatic investigation of mRNA-Seq data identified expression of 1,952 long intergenic ncRNA (lincRNA) in the developing mouse lens. In conclusion, we report a comprehensive ncRNA profile in the murine lens at six developmental time points. To the best of our knowledge, this is first report investigating different classes of ncRNAs in the developing mouse lens and will be monumental in elucidating processes essential for the development of the ocular lens and the maintenance of its transparency.
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Affiliation(s)
- Shahid Y Khan
- The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Sean F Hackett
- The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - S Amer Riazuddin
- The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA.
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82
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Ng KW, Anderson C, Marshall EA, Minatel BC, Enfield KSS, Saprunoff HL, Lam WL, Martinez VD. Piwi-interacting RNAs in cancer: emerging functions and clinical utility. Mol Cancer 2016; 15:5. [PMID: 26768585 PMCID: PMC4714483 DOI: 10.1186/s12943-016-0491-9] [Citation(s) in RCA: 140] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 01/05/2016] [Indexed: 12/29/2022] Open
Abstract
PIWI-interacting RNAs (piRNAs) are emerging players in cancer genomics. Originally described in the germline, there are over 20,000 piRNA genes in the human genome. In contrast to microRNAs, piRNAs interact with PIWI proteins, another member of the Argonaute family, and function primarily in the nucleus. There, they are involved in the epigenetic silencing of transposable elements in addition to the transcriptional regulation of genes. It has recently been demonstrated that piRNAs are also expressed across a variety of human somatic tissue types in a tissue-specific manner. An increasing number of studies have shown that aberrant piRNA expression is a signature feature across multiple tumour types; however, their specific tumorigenic functions remain unclear. In this article, we discuss the emerging functional roles of piRNAs in a variety of cancers, and highlight their potential clinical utilities.
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Affiliation(s)
- Kevin W Ng
- Department of Integrative Oncology, BC Cancer Agency, Vancouver, Canada.
| | - Christine Anderson
- Department of Integrative Oncology, BC Cancer Agency, Vancouver, Canada.
| | - Erin A Marshall
- Department of Integrative Oncology, BC Cancer Agency, Vancouver, Canada.
| | - Brenda C Minatel
- Department of Integrative Oncology, BC Cancer Agency, Vancouver, Canada.
| | - Katey S S Enfield
- Department of Integrative Oncology, BC Cancer Agency, Vancouver, Canada.
| | | | - Wan L Lam
- Department of Integrative Oncology, BC Cancer Agency, Vancouver, Canada.
| | - Victor D Martinez
- Department of Integrative Oncology, BC Cancer Agency, Vancouver, Canada.
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83
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Liu A, Liu S. Noncoding RNAs in Growth and Death of Cancer Cells. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 927:137-72. [DOI: 10.1007/978-981-10-1498-7_5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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84
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Abstract
Cancer cells have the unusual capacity to limit the cost of the mutation load that they harbor and simultaneously harness its evolutionary potential. This property fuels drug resistance, a key failure mode in oncogene-directed therapy. However, the factors that regulate this capacity might also provide an Achilles' heel that could be exploited therapeutically. Recently, insight has come from a seemingly distant field: protein folding. It is now clear that protein homeostasis broadly supports malignancy and fuels the rapid evolution of drug resistance. Among protein homeostatic mechanisms that influence cancer biology, the essential ATP-driven molecular chaperone heat-shock protein 90 (Hsp90) is especially important. Hsp90 catalyzes folding of many proteins that regulate growth and development. These "client" kinases, transcription factors, and ubiquitin ligases often play critical roles in human disease, especially cancer. Studies in a wide range of systems-from single-celled organisms to human tumor samples-suggest that Hsp90 can broadly reshape the map between genotype and phenotype, acting as a "capacitor" and "potentiator" of genetic variation. Indeed, it has likely done so to such a degree that it has left an impress on diverse genome sequences. Hsp90 can constitute as much as 5% of total protein in transformed cells and increased levels of heat-shock activation correlate with poor prognosis in breast cancer. These findings and others have motivated a flurry of interest in Hsp90 inhibitors as cancer therapeutics, which have met with rather limited success as single agents, but may eventually prove invaluable in limiting the emergence of resistance to other chemotherapeutics, both genotoxic and molecularly targeted. Here, we provide an overview of Hsp90 function, review its relationship to genetic variation and the evolution of new traits, and discuss the importance of these findings for cancer biology and future efforts to drug this pathway.
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Affiliation(s)
- Daniel Jarosz
- Chemical & Systems Biology, Stanford University School of Medicine, Stanford, California, USA; Developmental Biology, Stanford University School of Medicine, Stanford, California, USA.
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85
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Venkatesh T, Suresh PS, Tsutsumi R. Non-coding RNAs: Functions and applications in endocrine-related cancer. Mol Cell Endocrinol 2015; 416:88-96. [PMID: 26360585 DOI: 10.1016/j.mce.2015.08.026] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Revised: 08/28/2015] [Accepted: 08/31/2015] [Indexed: 01/25/2023]
Abstract
A significant fraction of the human genome is transcribed as non-coding RNAs (ncRNAs). This non-coding transcriptome has challenged the notion of the central dogma and its involvement in transcriptional and post-transcriptional regulation of gene expression is well established. Interestingly, several ncRNAs are dysregulated in cancer and current non-coding transcriptome research aims to use our increasing knowledge of these ncRNAs for the development of cancer biomarkers and anti-cancer drugs. In endocrine-related cancers, for which survival rates can be relatively low, there is a need for such advancements. In this review, we aimed to summarize the roles and clinical implications of recently discovered ncRNAs, including long ncRNAs, PIWI-interacting RNAs, tRNA- and Y RNA-derived ncRNAs, and small nucleolar RNAs, in endocrine-related cancers affecting both sexes. We focus on recent studies highlighting discoveries in ncRNA biology and expression in cancer, and conclude with a discussion on the challenges and future directions, including clinical application. ncRNAs show great promise as diagnostic tools and therapeutic targets, but further work is necessary to realize the potential of these unconventional transcripts.
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MESH Headings
- Biomarkers, Tumor/classification
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Endocrine Gland Neoplasms/genetics
- Endocrine Gland Neoplasms/metabolism
- Endocrine Gland Neoplasms/therapy
- Female
- Gene Expression Regulation
- Humans
- Male
- RNA, Long Noncoding/classification
- RNA, Long Noncoding/genetics
- RNA, Long Noncoding/metabolism
- RNA, Small Interfering/classification
- RNA, Small Interfering/genetics
- RNA, Small Interfering/metabolism
- RNA, Small Nucleolar/classification
- RNA, Small Nucleolar/genetics
- RNA, Small Nucleolar/metabolism
- Transcriptome
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Affiliation(s)
- Thejaswini Venkatesh
- Nitte University Centre for Science Education and Research (NUCSER), Nitte University, Deralakatte, Mangalore 575 018, Karnataka, India
| | - Padmanaban S Suresh
- Department of Biosciences, Mangalore University, Mangalagangothri, Mangalore 574 199, Karnataka, India.
| | - Rie Tsutsumi
- Division of Nutrition and Metabolism, Institute of Biomedical Science, Tokushima University, Tokushima, Japan
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86
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Zhou X, Battistoni G, El Demerdash O, Gurtowski J, Wunderer J, Falciatori I, Ladurner P, Schatz MC, Hannon GJ, Wasik KA. Dual functions of Macpiwi1 in transposon silencing and stem cell maintenance in the flatworm Macrostomum lignano. RNA (NEW YORK, N.Y.) 2015; 21:1885-97. [PMID: 26323280 PMCID: PMC4604429 DOI: 10.1261/rna.052456.115] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 06/29/2015] [Indexed: 06/04/2023]
Abstract
PIWI proteins and piRNA pathways are essential for transposon silencing and some aspects of gene regulation during animal germline development. In contrast to most animal species, some flatworms also express PIWIs and piRNAs in somatic stem cells, where they are required for tissue renewal and regeneration. Here, we have identified and characterized piRNAs and PIWI proteins in the emerging model flatworm Macrostomum lignano. We found that M. lignano encodes at least three PIWI proteins. One of these, Macpiwi1, acts as a key component of the canonical piRNA pathway in the germline and in somatic stem cells. Knockdown of Macpiwi1 dramatically reduces piRNA levels, derepresses transposons, and severely impacts stem cell maintenance. Knockdown of the piRNA biogenesis factor Macvasa caused an even greater reduction in piRNA levels with a corresponding increase in transposons. Yet, in Macvasa knockdown animals, we detected no major impact on stem cell self-renewal. These results may suggest stem cell maintenance functions of PIWI proteins in flatworms that are distinguishable from their impact on transposons and that might function independently of what are considered canonical piRNA populations.
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Affiliation(s)
- Xin Zhou
- Cold Spring Harbor Laboratory and Watson School of Biological Sciences, Cold Spring Harbor, New York 11724, USA Molecular and Cellular Biology Graduate Program, Stony Brook University, Stony Brook, New York 11794, USA
| | - Giorgia Battistoni
- Cold Spring Harbor Laboratory and Watson School of Biological Sciences, Cold Spring Harbor, New York 11724, USA
| | - Osama El Demerdash
- Cold Spring Harbor Laboratory and Watson School of Biological Sciences, Cold Spring Harbor, New York 11724, USA
| | - James Gurtowski
- Cold Spring Harbor Laboratory and Watson School of Biological Sciences, Cold Spring Harbor, New York 11724, USA
| | - Julia Wunderer
- University of Innsbruck, Institute of Zoology and CMBI, A-6020 Innsbruck, Austria
| | - Ilaria Falciatori
- Cold Spring Harbor Laboratory and Watson School of Biological Sciences, Cold Spring Harbor, New York 11724, USA
| | - Peter Ladurner
- University of Innsbruck, Institute of Zoology and CMBI, A-6020 Innsbruck, Austria
| | - Michael C Schatz
- Cold Spring Harbor Laboratory and Watson School of Biological Sciences, Cold Spring Harbor, New York 11724, USA
| | - Gregory J Hannon
- Cold Spring Harbor Laboratory and Watson School of Biological Sciences, Cold Spring Harbor, New York 11724, USA CRUK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Cambridge CB2 0RE, United Kingdom
| | - Kaja A Wasik
- Cold Spring Harbor Laboratory and Watson School of Biological Sciences, Cold Spring Harbor, New York 11724, USA
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87
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Dhivya S, Premkumar K. Nomadic genetic elements contribute to oncogenic translocations: Implications in carcinogenesis. Crit Rev Oncol Hematol 2015; 98:81-93. [PMID: 26548742 DOI: 10.1016/j.critrevonc.2015.10.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 10/05/2015] [Accepted: 10/27/2015] [Indexed: 12/22/2022] Open
Abstract
Chromosomal translocations as molecular signatures have been reported in various malignancies but, the mechanism behind which is largely unknown. Swapping of chromosomal fragments occurs by induction of double strand breaks (DSBs), most of which were initially assumed de novo. However, decoding of human genome proved that transposable elements (TE) might have profound influence on genome integrity. TEs are highly conserved mobile genetic elements that generate DSBs, subsequently resulting in large chromosomal rearrangements. Previously TE insertions were thought to be harmless, but recently gains attention due to the origin of spectrum of post-insertional genomic alterations and subsequent transcriptional alterations leading to development of deleterious effects mainly carcinogenesis. Though the existing knowledge on the cancer-associated TE dynamics is very primitive, exploration of underlying mechanism promises better therapeutic strategies for cancer. Thus, this review focuses on the prevalence of TE in the genome, associated genomic instability upon transposition activation and impact on tumorigenesis.
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Affiliation(s)
- Sridaran Dhivya
- Cancer Genetics and Nanomedicine Laboratory, Department of Biomedical Science, School of Basic Medical Sciences, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India
| | - Kumpati Premkumar
- Cancer Genetics and Nanomedicine Laboratory, Department of Biomedical Science, School of Basic Medical Sciences, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India.
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88
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Chen Z, Che Q, He X, Wang F, Wang H, Zhu M, Sun J, Wan X. Stem cell protein Piwil1 endowed endometrial cancer cells with stem-like properties via inducing epithelial-mesenchymal transition. BMC Cancer 2015; 15:811. [PMID: 26506848 PMCID: PMC4624602 DOI: 10.1186/s12885-015-1794-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 10/15/2015] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Stem cell protein Piwil1 functions as an oncogene in various tumor types. However, the exact function and mechanism of Piwil1 in endometrial cancer remains unclear. METHODS The expression of Piwil1 and its relationships with clinicopathological factors were investigated using immunohistochemistry. Up- or down-regulation of Piwil1 were achieved by stable or transient transfection with plasmids or short hairpin RNA (shRNA). Effects of Piwil1 on cancer cells viability, invasion and migration were evaluated by MTT, plate colony formation, transwell assay and nude mouse tumor xenograft assay. The stem-like properties of endometrial cancer cells was detected by spheroid formation assay. Effects of Piwil1 on expression levels of target genes were detected by qRT-PCR, western blotting and Immunofluorescence. RESULTS Compared with atypical hyperplasia and normal tissues, Piwil1 was much higher in endometrial carcinoma tissues. We found that Piwil1 expression was significantly correlated with FIGO stage, lymphovascular space involvement, lymph node metastasis and level of myometrial invasion. Overexpression of Piwil1 functioned to maintain stem-like characteristics, including enhancing tumor cell viability, migration, invasion and sphere-forming activity. Conversely, Piwil1 knockdown inhibited cell viability, migration, invasion, sphere-forming activity in vitro and tumor formation in xenograft model in vivo. Furthermore, study of the expression of epithelial and mesenchymal markers showed that Piwil1 was responsible for an EMT-like phenotype associated with an increase in mesenchymal markers and suppression of E-cadherin. Moreover, Piwil1 augmented expression levels of CD44 and ALDH1 expression, two known endometrial CSC markers, as well as other stemness-associated genes. CONCLUSIONS Our results suggested that stem cell protein Piwil1 play important roles in regulating EMT and the acquisition of stem-like properties of endometrial cancer cells. Therefore, it indicated that Piwil1 may represent a promising target for developing a novel treatment strategy for endometrial cancer.
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Affiliation(s)
- Zheng Chen
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China.
| | - Qi Che
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China.
| | - Xiaoying He
- Department of Obstetrics and Gynecology, International Peace Maternity and Child Health Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| | - Fangyuan Wang
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China.
| | - Huihui Wang
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China.
| | - Minjiao Zhu
- Department of Obstetrics and Gynecology, Shanghai First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China.
| | - Jing Sun
- Department of Obstetrics and Gynecology, Shanghai First Maternity and Infant Hospital, Tong Ji University School of Medicine, No. 536, Changle Road, Shanghai, 200080, China.
| | - Xiaoping Wan
- Department of Obstetrics and Gynecology, Shanghai First Maternity and Infant Hospital, Tong Ji University School of Medicine, No. 536, Changle Road, Shanghai, 200080, China.
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89
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Qu X, Liu J, Zhong X, Li X, Zhang Q. PIWIL2 promotes progression of non-small cell lung cancer by inducing CDK2 and Cyclin A expression. J Transl Med 2015; 13:301. [PMID: 26373553 PMCID: PMC4571108 DOI: 10.1186/s12967-015-0666-y] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 09/09/2015] [Indexed: 01/19/2023] Open
Abstract
Background PIWI proteins have important roles in tumorigenesis due to their interaction with piRNAs. Recent studies suggest that PIWI proteins affect prognosis of various cancers. Methods In the present study, PIWI genes expression was assayed in non-small cell lung cancer (NSCLC). To determine the effects of PIWIL2 on NSCLC cells, overexpression and interference assays were performed using the A549 and H460 cell lines. The tumor formation model was performed to demonstrate the effects of PIWIL2 on tumor formation in vivo. Results PIWIL2 was increased both at the RNA and protein level in malignant cancer tissues compared with adjacent normal tissue. Moreover, increased PIWIL2 gene expression was negatively correlated with prognosis in NSCLC patients. Overexpression and interference of PIWIL2 promoted and depressed cell proliferation, respectively. Meanwhile, PIWIL2 interference arrested cells at the G2/M stage. In addition, we found that CDK2 and Cyclin A expression were correlated with PIWIL2 expression. Moreover, transfection of PIWIL2 promoted tumor growth in nude mice. Conclusion Our findings shed light on the function of PIWIL2 in NSCLC and suggest potential prognostic and therapeutic value.
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Affiliation(s)
- Xiaohan Qu
- The First Affiliated Hospital, China Medical University, NO. 155, Nanjing North Street, Heping District, Shenyang, 110001, Liaoning, China.
| | - Jinlu Liu
- The Forth Affiliated Hospital, China Medical University, Shenyang, China.
| | - Xinwen Zhong
- The First Affiliated Hospital, China Medical University, NO. 155, Nanjing North Street, Heping District, Shenyang, 110001, Liaoning, China.
| | - Xi Li
- The First Affiliated Hospital, China Medical University, NO. 155, Nanjing North Street, Heping District, Shenyang, 110001, Liaoning, China.
| | - Qigang Zhang
- The First Affiliated Hospital, China Medical University, NO. 155, Nanjing North Street, Heping District, Shenyang, 110001, Liaoning, China.
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90
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Hashim A, Rizzo F, Marchese G, Ravo M, Tarallo R, Nassa G, Giurato G, Santamaria G, Cordella A, Cantarella C, Weisz A. RNA sequencing identifies specific PIWI-interacting small non-coding RNA expression patterns in breast cancer. Oncotarget 2015; 5:9901-10. [PMID: 25313140 PMCID: PMC4259446 DOI: 10.18632/oncotarget.2476] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
PIWI-interacting small non-coding RNAs (piRNAs) are genetic and epigenetic regulatory factors in germline cells, where they maintain genome stability, are involved in RNA silencing and regulate gene expression. We found that the piRNA biogenesis and effector pathway are present in human breast cancer (BC) cells and, analyzing smallRNA-Seq data generated from BC cell lines and tumor biopsies, we identified >100 BC piRNAs, including some very abundant and/or differentially expressed in mammary epithelial compared to BC cells, where this was influenced by estrogen or estrogen receptor β, and in cancer respect to normal breast tissues. A search for mRNAs targeted by the BC piRNome revealed that eight piRNAs showing a specific expression pattern in breast tumors target key cancer cell pathways. Evidence of an active piRNA pathway in BC suggests that these small non-coding RNAs do exert transcriptional and post-transcriptional gene regulatory actions also in cancer cells.
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Affiliation(s)
- Adnan Hashim
- Laboratory of Molecular Medicine and Genomics, Faculty of Medicine and Surgery, University of Salerno, Baronissi, SA, Italy
| | - Francesca Rizzo
- Laboratory of Molecular Medicine and Genomics, Faculty of Medicine and Surgery, University of Salerno, Baronissi, SA, Italy
| | - Giovanna Marchese
- Laboratory of Molecular Medicine and Genomics, Faculty of Medicine and Surgery, University of Salerno, Baronissi, SA, Italy
| | - Maria Ravo
- Laboratory of Molecular Medicine and Genomics, Faculty of Medicine and Surgery, University of Salerno, Baronissi, SA, Italy
| | - Roberta Tarallo
- Laboratory of Molecular Medicine and Genomics, Faculty of Medicine and Surgery, University of Salerno, Baronissi, SA, Italy
| | - Giovanni Nassa
- Laboratory of Molecular Medicine and Genomics, Faculty of Medicine and Surgery, University of Salerno, Baronissi, SA, Italy
| | - Giorgio Giurato
- Laboratory of Molecular Medicine and Genomics, Faculty of Medicine and Surgery, University of Salerno, Baronissi, SA, Italy
| | - Gianluca Santamaria
- Laboratory of Molecular Medicine and Genomics, Faculty of Medicine and Surgery, University of Salerno, Baronissi, SA, Italy
| | | | - Concita Cantarella
- Consiglio per la Ricerca e la Sperimentazione in Agricoltura, Centro di Ricerca per l'Orticoltura, Pontecagnano, SA, Italy
| | - Alessandro Weisz
- Laboratory of Molecular Medicine and Genomics, Faculty of Medicine and Surgery, University of Salerno, Baronissi, SA, Italy. Division of Molecular Pathology and Medical Genomics, 'SS. Giovanni di Dio e Ruggi d'Aragona' Hospital, University of Salerno, Salerno, Italy
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91
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A piRNA-like small RNA interacts with and modulates p-ERM proteins in human somatic cells. Nat Commun 2015; 6:7316. [PMID: 26095918 PMCID: PMC4557300 DOI: 10.1038/ncomms8316] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 04/27/2015] [Indexed: 12/15/2022] Open
Abstract
PIWI-interacting RNAs (piRNAs) are thought to silence transposon and gene expression during development. However, the roles of piRNAs in somatic tissues are largely unknown. Here we report the identification of 555 piRNAs in human lung bronchial epithelial (HBE) and non-small cell lung cancer (NSCLC) cell lines, including 295 that do not exist in databases termed as piRNA-like sncRNAs or piRNA-Ls. Distinctive piRNA/piRNA-L expression patterns are observed between HBE and NSCLC cells. piRNA-like-163 (piR-L-163), the top downregulated piRNA-L in NSCLC cells, binds directly to phosphorylated ERM proteins (p-ERM), which is dependent on the central part of UUNNUUUNNUU motif in piR-L-163 and the RRRKPDT element in ERM. The piR-L-163/p-ERM interaction is critical for p-ERM's binding capability to filamentous actin (F-actin) and ERM-binding phosphoprotein 50 (EBP50). Thus, piRNA/piRNA-L may play a regulatory role through direct interaction with proteins in physiological and pathophysiological conditions. PIWI-interacting RNAs (piRNAs) suppress transposon and gene expression during development. Here, the authors identify many piRNAs and piRNA-like small RNAs in 11 human cell lines, and show that one piRNA-like small RNA binds to phosphorylated ERM proteins to regulate cancer cell migration and invasion.
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92
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Taubert H, Wach S, Jung R, Pugia M, Keck B, Bertz S, Nolte E, Stoehr R, Lehmann J, Ohlmann CH, Stöckle M, Wullich B, Hartmann A. Piwil 2 expression is correlated with disease-specific and progression-free survival of chemotherapy-treated bladder cancer patients. Mol Med 2015; 21:371-80. [PMID: 25998509 DOI: 10.2119/molmed.2014.00250] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 05/13/2015] [Indexed: 12/21/2022] Open
Abstract
Piwi-like 2 (Piwil 2) belongs to the family of Argonaute genes/proteins. The expression of Piwil 2 is associated with stem cells. A role in tumorigenesis and/or tumor progression is proposed for different cancers but not yet for bladder cancer (BCa). We investigated the Piwil 2 expression by immunohistochemistry in a cohort of 202 BCa patients treated by cystectomy and adjuvant chemotherapy. The association between Piwil 2 expression and disease-specific (DSS) or progression-free survival (PFS) was calculated using Kaplan Meier analyses and univariate/multivariate Cox's regression hazard models.In a multivariate Cox's regression, Piwil 2 expression, either in the cytoplasm or the nucleus, was significantly associated with DSS and PFS. A weak cytoplasmic staining pattern was associated with poor DSS and tumor progression (RR=2.7; P=0.004 and RR=2.4; P=0.027). Likewise,, absent nuclear Piwil 2 immunoreactivity was associated with poor DSS and tumor progression (RR=2.3; P=0.023 and RR=2.2; P=0.022). BCa patients whose tumors exhibited a combination of weak cytoplasmic and absent nuclear immunoreactivity had a 6-fold increased risk of tumor-related death (P=0.005) compared to patients with strong expression. Considering only patients with high grade G3 tumors, a 7.8-fold risk of tumor-associated death and a 3.6-fold risk of tumor progression were detected independently of the histologic tumor subtype or the chemotherapy regimen. In summary, a combination of weak cytoplasmic and absent nuclear expression of Piwil 2 is significantly associated with an increased risk of DSS and tumor progression. This implicates that Piwil 2 could be a valuable prognostic marker for high-risk BCa patients.
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Affiliation(s)
- Helge Taubert
- Department of Urology, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Sven Wach
- Department of Urology, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Rudolf Jung
- Department of Pathology, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Michael Pugia
- Siemens Healthcare Diagnostics, Elkhart, Indiana, USA
| | - Bastian Keck
- Department of Urology, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Simone Bertz
- Department of Pathology, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Elke Nolte
- Department of Urology, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Robert Stoehr
- Department of Pathology, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Jan Lehmann
- Urologische Gemeinschaftspraxis, Prüner Gang and Department of Urology, Städtisches Krankenhaus, Kiel, Germany
| | | | - Michael Stöckle
- Department of Urology, Saarland University, Homburg, Germany
| | - Bernd Wullich
- Department of Urology, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Arndt Hartmann
- Department of Pathology, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
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93
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Tan Y, Liu L, Liao M, Zhang C, Hu S, Zou M, Gu M, Li X. Emerging roles for PIWI proteins in cancer. Acta Biochim Biophys Sin (Shanghai) 2015; 47:315-24. [PMID: 25854579 DOI: 10.1093/abbs/gmv018] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 02/13/2015] [Indexed: 12/18/2022] Open
Abstract
It is generally accepted that PIWI proteins are predominately expressed in the germline but absent in somatic tissues. Their best-characterized role is to suppress transposon expression, which ensures genomic stability in the germline. However, increasing evidence has suggested that PIWI proteins are linked to the hallmarks of cancer defined by Weinberg and Hanahan, such as cell proliferation, anti-apoptosis, genomic instability, invasion and metastasis. This provides new possibilities for anticancer therapies through the targeting of PIWI proteins, which may have fewer side effects due to their potential classification as a CTA (cancer/testis antigen). Furthermore, PIWI has been proposed to act as a diagnostic and prognostic marker for many types of cancer, and even to differentiate early- and late-stage cancers. We herein summarize the latest progress in this exciting field, hoping to encourage new investigations of PIWIs in cancer biology that will help to develop new therapeutics for clinical application.
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Affiliation(s)
- Yi Tan
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical University, Wenzhou 325035, China
| | - Lianyong Liu
- Department of Endocrine, Shanghai Pudong New Area Gongli Hospital, Second Military Medical University, Shanghai 200135, China
| | - Mingan Liao
- College of Horticulture, Sichuan Agricultural University, Ya'an 625014, China
| | - Chaobao Zhang
- Department of Endocrine, Shanghai Pudong New Area Gongli Hospital, Second Military Medical University, Shanghai 200135, China
| | - Shuanggang Hu
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200135, China
| | - Mei Zou
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200135, China
| | - Mingjun Gu
- Department of Endocrine, Shanghai Pudong New Area Gongli Hospital, Second Military Medical University, Shanghai 200135, China
| | - Xiangqi Li
- Department of Endocrine, Shanghai Pudong New Area Gongli Hospital, Second Military Medical University, Shanghai 200135, China
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94
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Abstract
PIWI-interacting RNAs (piRNAs) are a class of small RNAs that are 24-31 nucleotides in length. They associate with PIWI proteins, which constitute a germline-specific subclade of the Argonaute family, to form effector complexes known as piRNA-induced silencing complexes, which repress transposons via transcriptional or posttranscriptional mechanisms and maintain germline genome integrity. In addition to having a role in transposon silencing, piRNAs in diverse organisms function in the regulation of cellular genes. In some cases, piRNAs have shown transgenerational inheritance to pass on the memory of "self" and "nonself," suggesting a contribution to various cellular processes over generations. Many piRNA factors have been identified; however, both the molecular mechanisms leading to the production of mature piRNAs and the effector phases of gene silencing are still enigmatic. Here, we summarize the current state of our knowledge on the biogenesis of piRNA, its biological functions, and the underlying mechanisms.
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Affiliation(s)
- Yuka W Iwasaki
- Department of Molecular Biology, Keio University School of Medicine, Tokyo 160-8582, Japan;
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95
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Lu L, Katsaros D, Risch HA, Canuto EM, Biglia N, Yu H. MicroRNA let-7a modifies the effect of self-renewal gene HIWI on patient survival of epithelial ovarian cancer. Mol Carcinog 2015; 55:357-65. [PMID: 25630839 DOI: 10.1002/mc.22285] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 12/09/2014] [Accepted: 12/18/2014] [Indexed: 02/06/2023]
Abstract
Aberrant expressions of self-renewal gene HIWI and microRNA (miRNA) let-7a are observed in epithelial ovarian cancer (EOC). A U-shape association between HIWI expression and overall survival is seen in several human cancers but unknown in EOC. HIWI directly and/or indirectly interacts with let-7a, but the clinical relevance of this interaction is yet to be addressed. Here, we analyzed HIWI and let-7a expressions in 211 primary EOC tissues using quantitative reverse-transcription PCR to investigate HIWI and its interaction with let-7a in the prognostic significance of EOC. Associations of HIWI and its interaction with miRNA let-7a with patient survival were analyzed using the Kaplan-Meier survival curves and Cox proportional hazard regression models. Kaplan-Meier survival curves showed that patients with medium HIWI had poorer overall survival than those with low or high HIWI. An 89% increased death risk (HR = 1.89, 95% CI: 1.29-2.98) was observed in the medium HIWI group in multivariate Cox proportional hazard regression analyses. Among patients with high let-7a expression, those with medium HIWI had an increased risk of death compared to those with low HIWI (HR = 2.62, 95% CI: 1.30-5.30), whereas among those with low let-7a, no significant association between HIWI expression and overall survival was observed (HR = 1.63, 95% CI: 0.86-3.08). Moreover, HIWI expression also affected chemotherapy response. The results suggested that miRNA let-7a could modify the effect of HIWI expression on patient survival of EOC, expanding our understanding of the clinical relevance of HIWI and let-7a interaction in EOC prognosis. © 2015 Wiley Periodicals, Inc.
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Affiliation(s)
- Lingeng Lu
- Department of Chronic Disease Epidemiology, Yale School of Public Health, School of Medicine, Yale Cancer Center, Yale University, New Haven, Connecticut
| | - Dionyssios Katsaros
- Department of Surgical Science, A O Città della Salute e della Scienza di Torino, S. Anna Hospital, Turin, Italy
| | - Harvey A Risch
- Department of Chronic Disease Epidemiology, Yale School of Public Health, School of Medicine, Yale Cancer Center, Yale University, New Haven, Connecticut
| | - Emilie Marion Canuto
- Department of Surgical Science, A O Città della Salute e della Scienza di Torino, S. Anna Hospital, Turin, Italy
| | - Nicoletta Biglia
- Department of Surgical Science, Division of Obstetrics and Gynecology, University of Torino School of Medicine, Mauriziano Hospital, Turin, Italy
| | - Herbert Yu
- Department of Chronic Disease Epidemiology, Yale School of Public Health, School of Medicine, Yale Cancer Center, Yale University, New Haven, Connecticut.,Cancer Epidemiology Program, University of Hawaii Cancer Center, Honolulu, Hawaii
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96
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Zhang L, Liu W, Shao C, Zhang N, Li H, Liu K, Dong Z, Qi Q, Zhao W, Chen S. Cloning, expression and methylation analysis of piwil2 in half-smooth tongue sole (Cynoglossus semilaevis). Mar Genomics 2014; 18 Pt A:45-54. [DOI: 10.1016/j.margen.2014.04.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Revised: 04/17/2014] [Accepted: 04/18/2014] [Indexed: 12/25/2022]
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97
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Ricciuti B, Mecca C, Crinò L, Baglivo S, Cenci M, Metro G. Non-coding RNAs in lung cancer. Oncoscience 2014; 1:674-705. [PMID: 25593996 PMCID: PMC4278269 DOI: 10.18632/oncoscience.98] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 11/15/2014] [Indexed: 12/14/2022] Open
Abstract
The discovery that protein-coding genes represent less than 2% of all human genome, and the evidence that more than 90% of it is actively transcribed, changed the classical point of view of the central dogma of molecular biology, which was always based on the assumption that RNA functions mainly as an intermediate bridge between DNA sequences and protein synthesis machinery. Accumulating data indicates that non-coding RNAs are involved in different physiological processes, providing for the maintenance of cellular homeostasis. They are important regulators of gene expression, cellular differentiation, proliferation, migration, apoptosis, and stem cell maintenance. Alterations and disruptions of their expression or activity have increasingly been associated with pathological changes of cancer cells, this evidence and the prospect of using these molecules as diagnostic markers and therapeutic targets, make currently non-coding RNAs among the most relevant molecules in cancer research. In this paper we will provide an overview of non-coding RNA function and disruption in lung cancer biology, also focusing on their potential as diagnostic, prognostic and predictive biomarkers.
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Affiliation(s)
- Biagio Ricciuti
- Medical Oncology, Santa Maria della Misericordia Hospital, Azienda Ospedaliera di Perugia, Perugia, Italy
| | | | - Lucio Crinò
- Medical Oncology, Santa Maria della Misericordia Hospital, Azienda Ospedaliera di Perugia, Perugia, Italy
| | - Sara Baglivo
- Medical Oncology, Santa Maria della Misericordia Hospital, Azienda Ospedaliera di Perugia, Perugia, Italy
| | - Matteo Cenci
- Medical Oncology, Santa Maria della Misericordia Hospital, Azienda Ospedaliera di Perugia, Perugia, Italy
| | - Giulio Metro
- Medical Oncology, Santa Maria della Misericordia Hospital, Azienda Ospedaliera di Perugia, Perugia, Italy
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Expression profiles of PIWIL2 short isoforms differ in testicular germ cell tumors of various differentiation subtypes. PLoS One 2014; 9:e112528. [PMID: 25384072 PMCID: PMC4226551 DOI: 10.1371/journal.pone.0112528] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 09/13/2014] [Indexed: 01/22/2023] Open
Abstract
PIWI family proteins have recently emerged as essential contributors in numerous biological processes including germ cell development, stem cell maintenance and epigenetic reprogramming. Expression of some of the family members has been shown to be elevated in tumors. In particular, PIWIL2 has been probed as a potential neoplasia biomarker in many cancers in humans. Previously, PIWIL2 was shown to be expressed in most tumours as a set of its shorter isoforms. In this work, we demonstrated the presence of its 60 kDa (PL2L60A) and 80 kDa (PL2L80A) isoforms in testicular cancer cell lines. We also ascertained the transcriptional boundaries of mRNAs and alternative promoter regions for these PIWIL2 isoforms. Further, we probed a range of testicular germ cell tumor (TGCT) samples and found PIWIL2 to be predominantly expressed as PL2L60A in most of them. Importantly, the levels of both PL2L60A mRNA and protein products were found to vary depending on the differentiation subtype of TGCTs, i.e., PL2L60A expression is significantly higher in undifferentiated seminomas and appears to be substantially decreased in mixed and nonseminomatous TGCTs. The higher level of PL2L60A expression in undifferentiated TGCTs was further validated in the model system of retinoic acid induced differentiation in NT2/D1 cell line. Therefore, both PL2L60A mRNA and protein abundance could serve as an additional marker distinguishing between seminomas and nonseminomatous tumors with different prognosis and therapy approaches.
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Keam SP, Young PE, McCorkindale AL, Dang THY, Clancy JL, Humphreys DT, Preiss T, Hutvagner G, Martin DIK, Cropley JE, Suter CM. The human Piwi protein Hiwi2 associates with tRNA-derived piRNAs in somatic cells. Nucleic Acids Res 2014; 42:8984-95. [PMID: 25038252 PMCID: PMC4132735 DOI: 10.1093/nar/gku620] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 06/26/2014] [Accepted: 06/26/2014] [Indexed: 01/31/2023] Open
Abstract
The Piwi-piRNA pathway is active in animal germ cells where its functions are required for germ cell maintenance and gamete differentiation. Piwi proteins and piRNAs have been detected outside germline tissue in multiple phyla, but activity of the pathway in mammalian somatic cells has been little explored. In particular, Piwi expression has been observed in cancer cells, but nothing is known about the piRNA partners or the function of the system in these cells. We have surveyed the expression of the three human Piwi genes, Hiwi, Hili and Hiwi2, in multiple normal tissues and cancer cell lines. We find that Hiwi2 is ubiquitously expressed; in cancer cells the protein is largely restricted to the cytoplasm and is associated with translating ribosomes. Immunoprecipitation of Hiwi2 from MDAMB231 cancer cells enriches for piRNAs that are predominantly derived from processed tRNAs and expressed genes, species which can also be found in adult human testis. Our studies indicate that a Piwi-piRNA pathway is present in human somatic cells, with an uncharacterised function linked to translation. Taking this evidence together with evidence from primitive organisms, we propose that this somatic function of the pathway predates the germline functions of the pathway in modern animals.
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Affiliation(s)
- Simon P Keam
- Molecular, Structural and Computational Biology Division, Victor Chang Cardiac Research Institute, 405 Liverpool Street, Darlinghurst, NSW, 2010, Australia Faculty of Engineering and Information Technology, Centre of Health Technologies, University of Technology Sydney, 235 Jones Street, Ultimo, NSW, 2007, Australia
| | - Paul E Young
- Molecular, Structural and Computational Biology Division, Victor Chang Cardiac Research Institute, 405 Liverpool Street, Darlinghurst, NSW, 2010, Australia
| | - Alexandra L McCorkindale
- Molecular, Structural and Computational Biology Division, Victor Chang Cardiac Research Institute, 405 Liverpool Street, Darlinghurst, NSW, 2010, Australia
| | - Thurston H Y Dang
- Molecular, Structural and Computational Biology Division, Victor Chang Cardiac Research Institute, 405 Liverpool Street, Darlinghurst, NSW, 2010, Australia
| | - Jennifer L Clancy
- Molecular, Structural and Computational Biology Division, Victor Chang Cardiac Research Institute, 405 Liverpool Street, Darlinghurst, NSW, 2010, Australia
| | - David T Humphreys
- Molecular, Structural and Computational Biology Division, Victor Chang Cardiac Research Institute, 405 Liverpool Street, Darlinghurst, NSW, 2010, Australia
| | - Thomas Preiss
- Molecular, Structural and Computational Biology Division, Victor Chang Cardiac Research Institute, 405 Liverpool Street, Darlinghurst, NSW, 2010, Australia
| | - Gyorgy Hutvagner
- Faculty of Engineering and Information Technology, Centre of Health Technologies, University of Technology Sydney, 235 Jones Street, Ultimo, NSW, 2007, Australia
| | - David I K Martin
- Center for Genetics, Children's Hospital Oakland Research Institute, 5700 Martin Luther King Jr. Way, Oakland, CA 94609, USA
| | - Jennifer E Cropley
- Molecular, Structural and Computational Biology Division, Victor Chang Cardiac Research Institute, 405 Liverpool Street, Darlinghurst, NSW, 2010, Australia Faculty of Medicine, University of New South Wales, Kensington, 2052, Australia
| | - Catherine M Suter
- Molecular, Structural and Computational Biology Division, Victor Chang Cardiac Research Institute, 405 Liverpool Street, Darlinghurst, NSW, 2010, Australia Faculty of Medicine, University of New South Wales, Kensington, 2052, Australia
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100
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van Wolfswinkel JC. Piwi and Potency: PIWI Proteins in Animal Stem Cells and Regeneration. Integr Comp Biol 2014; 54:700-13. [DOI: 10.1093/icb/icu084] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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