1
|
Shi S, Li J, Zhang Z, Tu H, Max C. Isorhapontigenin (ISO) inhibits malignant cell transformation, migration, and invasion through MEG3/NEDD9 signaling in Cr(VI)-transformed cells. Toxicol Appl Pharmacol 2023; 476:116661. [PMID: 37619952 PMCID: PMC10874125 DOI: 10.1016/j.taap.2023.116661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/15/2023] [Accepted: 08/18/2023] [Indexed: 08/26/2023]
Abstract
Cr(VI) compounds are confirmed human carcinogens. Maternally expression 3 (MEG3) is the first long non-coding RNA to be identified as a tumor suppressor. MEG3 is frequently downregulated or lost in various primary human tumor tissues and cancer cell lines. Downregulation of MEG3 is associated with cancer initiation, progression, and metastasis. Our previous study has revealed that MEG3 was lost and NEDD9 was upregulated in Cr(VI)-transformed cells compared to those in passage-matched normal BEAS-2B cells. Overexpression of MEG3 reduced NEDD9. β-Catenin was activated in Cr(VI)-transformed cells, overexpression of MEG3 or knockdown of NEDD9 inhibited the activation of β-Catenin. The results from the present study showed that isorhapontigenin (ISO) treatment is able to suppress cell proliferation, migration, and invasion of Cr(VI)-transformed cells. Further study showed that ISO treatment in Cr(VI)-transformed cells decreases the levels of Ki67, a biomarker for cell proliferation, and of cyclin D1, a regulator for the cell cycle. ISO elevated the MEG3 expression level in Cr(VI)-transformed cells. The DNA methylation transferases DNMT3a, DNMT3b, and DNMT1 levels were reduced upon ISO treatment. ISO treatment decreased both mRNA and protein levels of NEDD9. In addition, ISO treatment reduced the activation of β-catenin. Slug was upregulated and E-Cadherin was downregulated in Cr(VI)-transformed cells, treatment with ISO decreased Slug and increased E-Cadherin. This study demonstrated that ISO is a potent therapeutical agent against lung cancer induced by Cr(VI).
Collapse
Affiliation(s)
- Sophia Shi
- Department of Environmental Medicine, New York University Grossman School of Medicine, 341 East 25(th) Street, NY, New York 10010, United States of America
| | - Jingxia Li
- Department of Environmental Medicine, New York University Grossman School of Medicine, 341 East 25(th) Street, NY, New York 10010, United States of America
| | - Zhuo Zhang
- Department of Environmental Medicine, New York University Grossman School of Medicine, 341 East 25(th) Street, NY, New York 10010, United States of America
| | - Huailu Tu
- Department of Environmental Medicine, New York University Grossman School of Medicine, 341 East 25(th) Street, NY, New York 10010, United States of America
| | - Costa Max
- Department of Environmental Medicine, New York University Grossman School of Medicine, 341 East 25(th) Street, NY, New York 10010, United States of America.
| |
Collapse
|
2
|
Elhelaly Elsherbeny M, Ramadan Elsergany A, Gamil Shaker O. Association of lncRNA MEG3 Rs7158663 Polymorphism and Serum Expression with Colorectal Cancer in Egyptian Patients. Rep Biochem Mol Biol 2023; 12:102-111. [PMID: 37724147 PMCID: PMC10505460 DOI: 10.52547/rbmb.12.1.102] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 02/16/2023] [Indexed: 09/20/2023]
Abstract
Background Colorectal cancer (CRC) is considered the third most common cancer around the world and second in terms of mortality. A significant aspect in its development is genetics. The risk of CRC and other clinicopathologic characteristics were investigated in this work in relation to the long non-coding RNA (lncRNA) MEG3 rs7158663 polymorphism, MEG3 expression, in an Egyptian population. Methods 160 CRC patients and 160 healthy controls were enrolled in this case-control study. The lncRNA MEG3 rs7158663 was examined using TaqMan Real-time PCR. RT-PCR was used to assess the levels of serum MEG3 expression. Results A significant higher expression of 'A' allele (risk allele) and A/A genotype in CRC cases vs. control subjects (P <0.001) Participants with A/A genotype had 4.8 times higher odds to exhibit CRC. Serum MEG3 gene expression was generally low in CRC patients, and it was considerably lower in those with the rs7158663 AA genotype than those with the GG genotype (P <0.001). It was found that CRC patients with the rs7158663 GA genotype had lower serum MEG3 expression levels than those with the GG genotype (P <0.001). Conclusions MEG3 low expression and MEG3 rs7158663 (AA) were associated with CRC risk in Egyptian patients and may serve as a diagnostic and prognostic marker for CRC patients.
Collapse
Affiliation(s)
- Mona Elhelaly Elsherbeny
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt.
| | - Alyaa Ramadan Elsergany
- Internal Medicine Department, Medical oncology unit, Oncology Center, Faculty of Medicine, Mansoura University, Mansoura, Egypt.
| | - Olfat Gamil Shaker
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Cairo University, Cairo, Egypt.
| |
Collapse
|
3
|
Zhang Z, Shi S, Li J, Costa M. Long Non-Coding RNA MEG3 in Metal Carcinogenesis. TOXICS 2023; 11:toxics11020157. [PMID: 36851033 PMCID: PMC9962265 DOI: 10.3390/toxics11020157] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/23/2023] [Accepted: 01/31/2023] [Indexed: 06/06/2023]
Abstract
Most transcripts from human genomes are non-coding RNAs (ncRNAs) that are not translated into proteins. ncRNAs are divided into long (lncRNAs) and small non-coding RNAs (sncRNAs). LncRNAs regulate their target genes both transcriptionally and post-transcriptionally through interactions with proteins, RNAs, and DNAs. Maternally expressed gene 3 (MEG3), a lncRNA, functions as a tumor suppressor. MEG3 regulates cell proliferation, cell cycle, apoptosis, hypoxia, autophagy, and many other processes involved in tumor development. MEG3 is downregulated in various cancer cell lines and primary human cancers. Heavy metals, such as hexavalent chromium (Cr(VI)), arsenic, nickel, and cadmium, are confirmed human carcinogens. The exposure of cells to these metals causes a variety of cancers. Among them, lung cancer is the one that can be induced by exposure to all of these metals. In vitro studies have demonstrated that the chronic exposure of normal human bronchial epithelial cells (BEAS-2B) to these metals can cause malignant cell transformation. Metal-transformed cells have the capability to cause an increase in cell proliferation, resistance to apoptosis, elevated migration and invasion, and properties of cancer stem-like cells. Studies have revealed that MEG is downregulated in Cr(VI)-transformed cells, nickel-transformed cells, and cadmium (Cd)-transformed cells. The forced expression of MEG3 reduces the migration and invasion of Cr(VI)-transformed cells through the downregulation of the neuronal precursor of developmentally downregulated protein 9 (NEDD9). MEG3 suppresses the malignant cell transformation of nickel-transformed cells. The overexpression of MEG3 decreases Bcl-xL, causing reduced apoptosis resistance in Cd-transformed cells. This paper reviews the current knowledge of lncRNA MEG3 in metal carcinogenesis.
Collapse
|
4
|
Hu Y, Lv F, Li N, Yuan X, Zhang L, Zhao S, Jin L, Qiu Y. Long noncoding RNA MEG3 inhibits oral squamous cell carcinoma progression via GATA3. FEBS Open Bio 2022; 13:195-208. [PMID: 36468944 PMCID: PMC9811608 DOI: 10.1002/2211-5463.13532] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 10/08/2022] [Accepted: 12/04/2022] [Indexed: 12/12/2022] Open
Abstract
Oral squamous cell carcinoma (OSCC) accounts for about 90% of oral cancers. Expression of the long noncoding RNA (lncRNA) maternally expressed 3 (MEG3) has previously been reported to be downregulated in OSCC, and its overexpression can inhibit proliferation, migration, and invasion and promote apoptosis of OSCC cells. However, the mechanism underlying MEG3 downregulation in OSCC has not been well characterized. Here we report that low expression of MEG3 is caused by H3K27me3 modification of the MEG3 gene locus, and this is associated with the poor prognosis of OSCC. Overexpression of MEG3 inhibited the proliferation and invasion of OSCC cells. We observed that MEG3 was modified by m6A and bound to YTHDC1. Enhancer-controlled genes positively regulated by MEG3 were functionally enriched for the 'negative regulation of Wnt signaling pathway' term, as determined using metascape. GATA3 was predicted to be a transcription factor for these genes, and was demonstrated to bind to MEG3. Knockdown of GATA3 countered the effects on proliferation, invasion, and increased transcription of HIC1 and PRICKLE1 induced by MEG3 overexpression. In conclusion, our data suggest that MEG3 is downregulated in OSCC due to trimethylation of H3K27 at the MEG3 gene locus. The inhibitory effect of MEG3 on proliferation and invasion of OSCC cells was dependent on the binding of GATA3.
Collapse
Affiliation(s)
- Yan Hu
- Department of StomatologyAffiliated Hospital of Hebei UniversityBaodingChina
| | - Feifei Lv
- Department of StomatologyAffiliated Hospital of Hebei UniversityBaodingChina
| | - Na Li
- Department of StomatologySecond Hospital of ShijiazhuangChina
| | - Xuewei Yuan
- Department of StomatologySecond Hospital of ShijiazhuangChina
| | - Liru Zhang
- Department of StomatologySecond Hospital of ShijiazhuangChina
| | - Shuangling Zhao
- Department of StomatologyFirst Outpatient Department of Hebei ProvinceShijiazhuangChina
| | - Linyu Jin
- Department of Stomatology, Fourth Affiliated HospitalHebei Medical UniversityShijiazhuangChina
| | - Yongle Qiu
- Department of Stomatology, Fourth Affiliated HospitalHebei Medical UniversityShijiazhuangChina
| |
Collapse
|
5
|
Novel Insights into MEG3/miR664a-3p/ADH4 Axis and Its Possible Role in Hepatocellular Carcinoma from an in Silico Perspective. Genes (Basel) 2022; 13:genes13122254. [PMID: 36553522 PMCID: PMC9778073 DOI: 10.3390/genes13122254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/19/2022] [Accepted: 11/28/2022] [Indexed: 12/05/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is a complex disease involving altered interactomes of transcripts and proteins. MicroRNAs (miRNAs) are small-noncoding RNAs that can interact with specific gene transcripts and an array of other vital endogenous non-coding RNAs (lncRNAs) that can influence gene expression. Maternally Expressed Gene 3 (MEG3) is an imprinted lncRNA that is reported to be downregulated in HCC (in both cell lines and tumors). Alcohol Dehydrogenase 4 (ADH4) is a well-known prognostic protein biomarker for predicting the survival outcomes of patients with hepatocellular carcinoma whose expression is regulated by miR-664a-3p, which is upregulated in HCC. In this study, we performed a battery of robust and systematic in silico analyses to predicate the possible lncRNA-miRNA interactions between MEG3, miR-664a-3p, and ADH4. miRNA-mRNA and lncRNA-miRNA hybrid structures were primarily obtained, and the minimum free energies (MFEs) for the 3'UTR (Untranslated Regions) of ADH4-miR-664a-3p and the 3'UTR of MEG3-miR-664a-3p interactions were assessed to predict the stability of the obtained RNA heteroduplex hybrids. The hybrid with the least minimum free energy (MFE) was considered to be the most favorable. The MFEs were around -28.1 kcal/mol and -31.3 kCal/mol for the ADH4-miR-664a-3p and MEG3-miR-66a-3p RNA hybrids, respectively. This demonstrated that lncRNA-MEG3 might be a competitive endogenous RNA that acts as a molecular sponge for miR-664a-3p. In summary, our interaction analyses results predict the significance of the MEG3/miR-664a-3p/ADH4 axis, where MEG3 downregulation results in miR-664a-3p overexpression and the subsequential underexpression of ADH4 in HCC, as a novel axis of interest that demands further validation.
Collapse
|
6
|
Dey S, Misra A, Selvi Bharathavikru R. Long Non-coding RNAs, Lnc (ing) RNA Metabolism to Cancer Biology. Subcell Biochem 2022; 100:175-199. [PMID: 36301495 DOI: 10.1007/978-3-031-07634-3_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The eukaryotic genome is represented by a vast proportion of non-coding regions, which in recent years have been attributed to have important functional roles in gene regulation through a myriad of processes, ranging from proper localization, correct folding and, most importantly, spatial and temporally regulated expression of genes. One of the major contributing factors in these processes is ribonucleic acid (RNA) metabolism, which comprises the RNA-nucleoprotein (RNP) complexes that interact with and instruct the genome to function. Long non-coding RNAs are an integral component of several RNPs, and herein we provide an overview of the understanding of the long non-coding RNAs, their characteristics, their function and their balancing act as dual modulators in cancer manifestation and progression.
Collapse
Affiliation(s)
- Sourav Dey
- RNP Biology Laboratory, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER)-Berhampur, Transit Campus, Govt ITI Building, Engineering School Junction, Berhampur, Ganjam, Odisha, India
| | - Arushi Misra
- RNP Biology Laboratory, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER)-Berhampur, Transit Campus, Govt ITI Building, Engineering School Junction, Berhampur, Ganjam, Odisha, India
| | - R Selvi Bharathavikru
- RNP Biology Laboratory, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER)-Berhampur, Transit Campus, Govt ITI Building, Engineering School Junction, Berhampur, Ganjam, Odisha, India.
| |
Collapse
|
7
|
Xu X, Zhong Z, Shao Y, Yi Y. Prognostic Value of MEG3 and Its Correlation With Immune Infiltrates in Gliomas. Front Genet 2021; 12:679097. [PMID: 34220951 PMCID: PMC8242350 DOI: 10.3389/fgene.2021.679097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 05/10/2021] [Indexed: 12/24/2022] Open
Abstract
Accumulating evidence has revealed that dysregulated lncRNA expression contributes to the onset and progression of cancer. However, the mechanistic role of lncRNA in glioma progression and tumor immunology remains largely unknown. This study aimed to evaluate the significance of maternally expressed gene 3 (MEG3) in the prognosis of and its immune-related roles in gliomas. The expression levels of MEG3 were analyzed using Oncomine and TIMER database. As an important imprinted gene, the copy number variation (CNV) of MEG3 in both glioblastoma multiforme (GBM) and low-grade glioma (LGG) were analyzed using GSCALite database, whereas its prognostic significance was assessed using PrognoScan and GEPIA databases. The relationship between MEG3 and tumor-infiltrated immune cells was analyzed using TIMER. Results showed that MEG3 expression was lower in most of the human cancer tissues than in the normal tissues. We also found that heterozygous deletion of MEG3 occurred more frequent than heterozygous amplification in gliomas, and mRNA expression of MEG3 was significantly positively correlated with its CNV in both the GBM and LGG group. Survival analysis showed that the CNV level of MEG3 had significant correlation with overall survival (OS) and progression-free survival (PFS) compared with wild type in LGG. Lower MEG3 expression was related with poor prognosis. Further analysis showed that in GBM, MEG3 expression level was significantly positively correlated with that of infiltrating CD8+ T cells and significantly negatively correlated with that of infiltrating dendritic cells. In LGG, MEG3 expression level was significantly negatively correlated with levels of infiltrating B cells, CD8+ T cells, CD4+ T cells, macrophages, neutrophils, and dendritic cells. Univariate Cox survival analysis demonstrated that only the level of infiltrating dendritic cells significantly affected the survival time of patients with GBM, while all six types of immune cells had a significant effect on the survival time of patients with LGG. Furthermore, MEG3 expression showed strong correlations with multiple immune markers in gliomas, especially in LGG. The current findings suggest that MEG3 expression might serve as a possible prognostic marker and potential immunotherapeutic target for gliomas.
Collapse
Affiliation(s)
- Xiaoping Xu
- Department of Neurosurgery, The Second People's Hospital of Yibin, Yibin, China
| | - Zhenglan Zhong
- Department of Health Examination, The Second People's Hospital of Yibin, Yibin, China
| | - Yongxiang Shao
- Department of Neurosurgery, The Second People's Hospital of Yibin, Yibin, China
| | - Yong Yi
- Department of Neurosurgery, The Second People's Hospital of Yibin, Yibin, China
| |
Collapse
|
8
|
Buccarelli M, Lulli V, Giuliani A, Signore M, Martini M, D'Alessandris QG, Giannetti S, Novelli A, Ilari R, Giurato G, Boe A, Castellani G, Spartano S, Marangi G, Biffoni M, Genuardi M, Pallini R, Marziali G, Ricci-Vitiani L. Deregulated expression of the imprinted DLK1-DIO3 region in glioblastoma stemlike cells: tumor suppressor role of lncRNA MEG3. Neuro Oncol 2021; 22:1771-1784. [PMID: 32459347 PMCID: PMC7746944 DOI: 10.1093/neuonc/noaa127] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Background Glioblastoma (GBM) stemlike cells (GSCs) are thought to be responsible for the maintenance and aggressiveness of GBM, the most common primary brain tumor in adults. This study aims at elucidating the involvement of deregulations within the imprinted delta-like homolog 1 gene‒type III iodothyronine deiodinase gene (DLK-DIO3) region on chromosome 14q32 in GBM pathogenesis. Methods Real-time PCR analyses were performed on GSCs and GBM tissues. Methylation analyses, gene expression, and reverse-phase protein array profiles were used to investigate the tumor suppressor function of the maternally expressed 3 gene (MEG3). Results Loss of expression of genes and noncoding RNAs within the DLK1-DIO3 region was observed in GSCs and GBM tissues compared with normal brain. This downregulation is mainly mediated by epigenetic silencing. Kaplan–Meier analysis indicated that low expression of MEG3 and MEG8 long noncoding (lnc)RNAs significantly correlated with short survival in GBM patients. MEG3 restoration impairs tumorigenic abilities of GSCs in vitro by inhibiting cell growth, migration, and colony formation and decreases in vivo tumor growth, reducing infiltrative growth. These effects were associated with modulation of genes involved in cell adhesion and epithelial-to-mesenchymal transition (EMT). Conclusion In GBM, MEG3 acts as a tumor suppressor mainly regulating cell adhesion, EMT, and cell proliferation, thus providing a potential candidate for novel GBM therapies.
Collapse
Affiliation(s)
| | | | | | - Michele Signore
- Core Facilities, Higher Institute of Health (Istituto Superiore di Sanità), Rome, Italy
| | - Maurizio Martini
- A. Gemelli University Polyclinic Foundation, Scientific Hospitalization and Care Institute (IRCCS), Rome, Italy.,Institutes of Pathology, Catholic University School of Medicine, Rome, Italy
| | - Quintino G D'Alessandris
- A. Gemelli University Polyclinic Foundation, Scientific Hospitalization and Care Institute (IRCCS), Rome, Italy.,Neurosurgery, Catholic University School of Medicine, Rome, Italy
| | - Stefano Giannetti
- A. Gemelli University Polyclinic Foundation, Scientific Hospitalization and Care Institute (IRCCS), Rome, Italy.,Human Anatomy, Catholic University School of Medicine, Rome, Italy
| | - Agnese Novelli
- Genomic Medicine, Catholic University School of Medicine, Rome, Italy
| | - Ramona Ilari
- Department of Oncology and Molecular Medicine Rome, Italy
| | - Giorgio Giurato
- Laboratory of Molecular Medicine and Genomics, Department of Medicine, Surgery, and Dentistry, "Scuola Medica Salernitana," University of Salerno, Baronissi, Salerno, Italy.,Genomix4Life Srl, University of Salerno, Baronissi, Salerno, Italy
| | - Alessandra Boe
- Core Facilities, Higher Institute of Health (Istituto Superiore di Sanità), Rome, Italy
| | | | - Serena Spartano
- Genomic Medicine, Catholic University School of Medicine, Rome, Italy
| | - Giuseppe Marangi
- Department of Oncology and Molecular Medicine Rome, Italy.,Genomic Medicine, Catholic University School of Medicine, Rome, Italy
| | - Mauro Biffoni
- Department of Oncology and Molecular Medicine Rome, Italy
| | - Maurizio Genuardi
- A. Gemelli University Polyclinic Foundation, Scientific Hospitalization and Care Institute (IRCCS), Rome, Italy.,Genomic Medicine, Catholic University School of Medicine, Rome, Italy
| | - Roberto Pallini
- A. Gemelli University Polyclinic Foundation, Scientific Hospitalization and Care Institute (IRCCS), Rome, Italy.,Neurosurgery, Catholic University School of Medicine, Rome, Italy
| | - Giovanna Marziali
- Department of Oncology and Molecular Medicine Rome, Italy.,Genomic Medicine, Catholic University School of Medicine, Rome, Italy
| | | |
Collapse
|
9
|
Pignata L, Palumbo O, Cerrato F, Acurzio B, de Álava E, Roma J, Gallego S, Mora J, Carella M, Riccio A, Verde G. Both Epimutations and Chromosome Aberrations Affect Multiple Imprinted Loci in Aggressive Wilms Tumors. Cancers (Basel) 2020; 12:cancers12113411. [PMID: 33217932 PMCID: PMC7698742 DOI: 10.3390/cancers12113411] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/11/2020] [Accepted: 11/16/2020] [Indexed: 12/21/2022] Open
Abstract
The embryonal renal cancer Wilms tumor (WT) accounts for 7% of all children's malignancies. Its most frequent molecular defect is represented by DNA methylation abnormalities at the imprinted 11p15.5 region. Multiple imprinted methylation alterations dictated by chromosome copy-number variations have been recently demonstrated in adult cancers, raising the question of whether multiple imprinted loci were also affected in WT. To address this issue, we analyzed DNA methylation and chromosome profiles of 7 imprinted loci in 48 WT samples. The results demonstrated that methylation abnormalities of multiple imprinted loci occurred in 35% of the cases, but that they were associated with either chromosome aberrations or normal chromosome profiles. Multiple imprinted methylation changes were correlated with tumor stage and presence of metastasis, indicating that these epimutations were more frequent in highly aggressive tumors. When chromosome profiles were affected, these alterations were extended to flanking cancer driver genes. Overall, this study demonstrates the presence of multiple imprinted methylation defects in aggressive WTs and suggests that the mechanism by which they arise in embryonal and adult cancers is different.
Collapse
Affiliation(s)
- Laura Pignata
- Department of Environmental Biological and Pharmaceutical Sciences and Technologies, University of Campania ‘Luigi Vanvitelli’, 81100 Caserta, Italy; (L.P.); (F.C.)
- Institute of Genetics and Biophysics ‘Adriano Buzzati-Traverso’ CNR, 80131-Napoli, Italy;
| | - Orazio Palumbo
- Division of Medical Genetics, Fondazione IRCCS “Casa Sollievo della Sofferenza”, 71013 San Giovanni Rotondo (FG), Italy; (O.P.); (M.C.)
| | - Flavia Cerrato
- Department of Environmental Biological and Pharmaceutical Sciences and Technologies, University of Campania ‘Luigi Vanvitelli’, 81100 Caserta, Italy; (L.P.); (F.C.)
| | - Basilia Acurzio
- Institute of Genetics and Biophysics ‘Adriano Buzzati-Traverso’ CNR, 80131-Napoli, Italy;
| | - Enrique de Álava
- Department of Pathology, Institute of Biomedicine of Sevilla (IBiS), Virgen del Rocio University Hospital/CSIC/University of Sevilla/CIBERONC, 41013 Seville, Spain;
- Department of Normal and Pathological Cytology and Histology, School of Medicine, University of Seville, 08035 Seville, Spain
| | - Josep Roma
- Group of Translational Research in Child and Adolescent Cancer, Vall d’Hebron Research Institute-Universitat Autònoma de Barcelona, 08193 Barcelona, Spain; (J.R.); (S.G.)
| | - Soledad Gallego
- Group of Translational Research in Child and Adolescent Cancer, Vall d’Hebron Research Institute-Universitat Autònoma de Barcelona, 08193 Barcelona, Spain; (J.R.); (S.G.)
| | - Jaume Mora
- Pediatric Cancer Center Barcelona (PCCB), Hospital Sant Joan de Déu, Esplugues de Llobregat, 08950 Barcelona, Spain;
| | - Massimo Carella
- Division of Medical Genetics, Fondazione IRCCS “Casa Sollievo della Sofferenza”, 71013 San Giovanni Rotondo (FG), Italy; (O.P.); (M.C.)
| | - Andrea Riccio
- Department of Environmental Biological and Pharmaceutical Sciences and Technologies, University of Campania ‘Luigi Vanvitelli’, 81100 Caserta, Italy; (L.P.); (F.C.)
- Institute of Genetics and Biophysics ‘Adriano Buzzati-Traverso’ CNR, 80131-Napoli, Italy;
- Correspondence: (A.R.); (G.V.)
| | - Gaetano Verde
- Department of Environmental Biological and Pharmaceutical Sciences and Technologies, University of Campania ‘Luigi Vanvitelli’, 81100 Caserta, Italy; (L.P.); (F.C.)
- Institute of Genetics and Biophysics ‘Adriano Buzzati-Traverso’ CNR, 80131-Napoli, Italy;
- Correspondence: (A.R.); (G.V.)
| |
Collapse
|
10
|
Aprile M, Katopodi V, Leucci E, Costa V. LncRNAs in Cancer: From garbage to Junk. Cancers (Basel) 2020; 12:E3220. [PMID: 33142861 PMCID: PMC7692075 DOI: 10.3390/cancers12113220] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 10/28/2020] [Accepted: 10/29/2020] [Indexed: 12/13/2022] Open
Abstract
Sequencing-based transcriptomics has significantly redefined the concept of genome complexity, leading to the identification of thousands of lncRNA genes identification of thousands of lncRNA genes whose products possess transcriptional and/or post-transcriptional regulatory functions that help to shape cell functionality and fate. Indeed, it is well-established now that lncRNAs play a key role in the regulation of gene expression through epigenetic and posttranscriptional mechanims. The rapid increase of studies reporting lncRNAs alteration in cancers has also highlighted their relevance for tumorigenesis. Herein we describe the most prominent examples of well-established lncRNAs having oncogenic and/or tumor suppressive activity. We also discuss how technical advances have provided new therapeutic strategies based on their targeting, and also report the challenges towards their use in the clinical settings.
Collapse
Affiliation(s)
- Marianna Aprile
- Institute of Genetics and Biophysics “Adriano Buzzati-Traverso”, CNR, 80131 Naples, Italy;
| | - Vicky Katopodi
- Laboratory for RNA Cancer Biology, Department of Oncology, KULeuven, LKI, Herestraat 49, 3000 Leuven, Belgium; (V.K.); (E.L.)
| | - Eleonora Leucci
- Laboratory for RNA Cancer Biology, Department of Oncology, KULeuven, LKI, Herestraat 49, 3000 Leuven, Belgium; (V.K.); (E.L.)
| | - Valerio Costa
- Institute of Genetics and Biophysics “Adriano Buzzati-Traverso”, CNR, 80131 Naples, Italy;
| |
Collapse
|
11
|
Novak EM, Gimenez TM, Neves NH, Vince CC, Krepischi ACV, Lapa RM, Cristofani LM, Bendit I, Filho VO. MEG3 and MEG8 aberrant methylation in an infant with neuroblastoma. Pediatr Blood Cancer 2020; 67:e28328. [PMID: 32667684 DOI: 10.1002/pbc.28328] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 03/11/2020] [Accepted: 03/16/2020] [Indexed: 01/04/2023]
Affiliation(s)
- Estela M Novak
- Instituto de Tratamento de Câncer Infantil, Instituto da Criança, HC/FMUSP, São Paulo, Brazil.,Laboratório de Investigação Médica (LIM 36), Instituto da Criança, HC/FMUSP, São Paulo, Brazil.,Fundação Pró-Sangue Hemocentro de São Paulo, São Paulo, Brazil
| | - Thamiris M Gimenez
- Instituto de Tratamento de Câncer Infantil, Instituto da Criança, HC/FMUSP, São Paulo, Brazil.,Laboratório de Investigação Médica (LIM 36), Instituto da Criança, HC/FMUSP, São Paulo, Brazil
| | - Nathalia H Neves
- Instituto de Tratamento de Câncer Infantil, Instituto da Criança, HC/FMUSP, São Paulo, Brazil.,Hospital Israelita Albert Einstein (HIAE), São Paulo, Brazil
| | - Carolina C Vince
- Instituto de Tratamento de Câncer Infantil, Instituto da Criança, HC/FMUSP, São Paulo, Brazil.,Hospital Israelita Albert Einstein (HIAE), São Paulo, Brazil
| | - Ana Cristina V Krepischi
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, Brazil
| | - Rainer M Lapa
- Genetics Department, Biosciences Institute - Universidade Estadual Paulista, Botucatu, São Paulo, Brazil
| | - Lilian M Cristofani
- Instituto de Tratamento de Câncer Infantil, Instituto da Criança, HC/FMUSP, São Paulo, Brazil
| | - Israel Bendit
- Fundação Pró-Sangue Hemocentro de São Paulo, São Paulo, Brazil
| | - Vicente Odone Filho
- Instituto de Tratamento de Câncer Infantil, Instituto da Criança, HC/FMUSP, São Paulo, Brazil.,Hospital Israelita Albert Einstein (HIAE), São Paulo, Brazil
| |
Collapse
|
12
|
Schacker M, Cheng YH, Eckersley-Maslin M, Snaith RM, Colledge WH. Hypermethylation and reduced expression of Gtl2, Rian and Mirg at the Dlk1-Dio3 imprinted locus as a marker for poor developmental potential of mouse embryonic stem cells. Stem Cell Res 2020; 48:101931. [PMID: 32822966 PMCID: PMC7567021 DOI: 10.1016/j.scr.2020.101931] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 07/19/2020] [Accepted: 07/22/2020] [Indexed: 01/10/2023] Open
Abstract
Reduced expression of Gtl2, Rian and Mirg in ES cells compromised survival of chimaeric fetuses. Reduced expression of Gtl2, Rian and Mirg was associated with hypermethylation. Compromised ES cells can be identified and eliminated from experiments to reduce animal use.
Mouse embryonic stem cells (ESCs) have played a crucial role in biomedical research where they can be used to elucidate gene function through the generation of genetically modified mice. A critical requirement for the success of this technology is the ability of ESCs to contribute to viable chimaeras with germ-line transmission of the genetically modified allele. We have identified several ESC clones that cause embryonic death of chimaeras at mid to late gestation stages. These clones had a normal karyotype, were pathogen free and their in vitro differentiation potential was not compromised. Chimaeric embryos developed normally up to E13.5 but showed a significant decrease in embryo survival by E17.5 with frequent haemorrhaging. We investigated the relationship between the ESCs transcriptional and epigenomic state and their ability to contribute to viable chimaeras. RNA sequencing identified four genes (Gtl2, Rian, Mirg and Rtl1as) located in the Dlk1-Dio3 imprinted locus that were expressed at lower levels in the compromised ESC clones and this was confirmed by qRT-PCR. Bisulphite sequencing analysis showed significant hypermethylation at the Dlk1-Dio3 imprinted locus with no consistent differences in methylation patterns at other imprinted loci. Treatment of the compromised ESCs with 5-azacytidine reactivated stable expression of Gtl2 and rescued the lethal phenotype but only gave low level chimaeras.
Collapse
Affiliation(s)
- Maria Schacker
- Reproductive Physiology Group, Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge CB2 3EG, UK
| | - Yi-Han Cheng
- Medimmune, Sir Aaron Klug Building, Granta Park, Cambridge CB21 6GH, UK
| | | | | | - William Henry Colledge
- Reproductive Physiology Group, Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge CB2 3EG, UK.
| |
Collapse
|
13
|
Argyraki M, Damdimopoulou P, Chatzimeletiou K, Grimbizis GF, Tarlatzis BC, Syrrou M, Lambropoulos A. In-utero stress and mode of conception: impact on regulation of imprinted genes, fetal development and future health. Hum Reprod Update 2020; 25:777-801. [PMID: 31633761 DOI: 10.1093/humupd/dmz025] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 07/04/2019] [Accepted: 07/12/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Genomic imprinting is an epigenetic gene regulatory mechanism; disruption of this process during early embryonic development can have major consequences on both fetal and placental development. The periconceptional period and intrauterine life are crucial for determining long-term susceptibility to diseases. Treatments and procedures in assisted reproductive technologies (ART) and adverse in-utero environments may modify the methylation levels of genomic imprinting regions, including insulin-like growth factor 2 (IGF2)/H19, mesoderm-specific transcript (MEST), and paternally expressed gene 10 (PEG10), affecting the development of the fetus. ART, maternal psychological stress, and gestational exposures to chemicals are common stressors suspected to alter global epigenetic patterns including imprinted genes. OBJECTIVE AND RATIONALE Our objective is to highlight the effect of conception mode and maternal psychological stress on fetal development. Specifically, we monitor fetal programming, regulation of imprinted genes, fetal growth, and long-term disease risk, using the imprinted genes IGF2/H19, MEST, and PEG10 as examples. The possible role of environmental chemicals in genomic imprinting is also discussed. SEARCH METHODS A PubMed search of articles published mostly from 2005 to 2019 was conducted using search terms IGF2/H19, MEST, PEG10, imprinted genes, DNA methylation, gene expression, and imprinting disorders (IDs). Studies focusing on maternal prenatal stress, psychological well-being, environmental chemicals, ART, and placental/fetal development were evaluated and included in this review. OUTCOMES IGF2/H19, MEST, and PEG10 imprinted genes have a broad developmental effect on fetal growth and birth weight variation. Their disruption is linked to pregnancy complications, metabolic disorders, cognitive impairment, and cancer. Adverse early environment has a major impact on the developing fetus, affecting mostly growth, the structure, and subsequent function of the hypothalamic-pituitary-adrenal axis and neurodevelopment. Extensive evidence suggests that the gestational environment has an impact on epigenetic patterns including imprinting, which can lead to adverse long-term outcomes in the offspring. Environmental stressors such as maternal prenatal psychological stress have been found to associate with altered DNA methylation patterns in placenta and to affect fetal development. Studies conducted during the past decades have suggested that ART pregnancies are at a higher risk for a number of complications such as birth defects and IDs. ART procedures involve multiple steps that are conducted during critical windows for imprinting establishment and maintenance, necessitating long-term evaluation of children conceived through ART. Exposure to environmental chemicals can affect placental imprinting and fetal growth both in humans and in experimental animals. Therefore, their role in imprinting should be better elucidated, considering the ubiquitous exposure to these chemicals. WIDER IMPLICATIONS Dysregulation of imprinted genes is a plausible mechanism linking stressors such as maternal psychological stress, conception using ART, and chemical exposures with fetal growth. It is expected that a greater understanding of the role of imprinted genes and their regulation in fetal development will provide insights for clinical prevention and management of growth and IDs. In a broader context, evidence connecting impaired imprinted gene function to common diseases such as cancer is increasing. This implies early regulation of imprinting may enable control of long-term human health, reducing the burden of disease in the population in years to come.
Collapse
Affiliation(s)
- Maria Argyraki
- First Department of Obstetrics and Gynecology, Laboratory of Genetics, School of Medicine, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Ring Road, Nea Efkarpia, 56403 Thessaloniki, Greece
| | - Pauliina Damdimopoulou
- Karolinska Institutet, Department of Clinical Sciences, Intervention and Technology, Unit of Obstetrics and Gynecology, K57 Karolinska University Hospital Huddinge, SE-14186 Stockholm, Sweden
| | - Katerina Chatzimeletiou
- First Department of Obstetrics and Gynecology, Unit for Human Reproduction, School of Medicine, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Ring Road, Nea Efkarpia, 56403 Thessaloniki, Greece
| | - Grigoris F Grimbizis
- First Department of Obstetrics and Gynecology, Unit for Human Reproduction, School of Medicine, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Ring Road, Nea Efkarpia, 56403 Thessaloniki, Greece
| | - Basil C Tarlatzis
- First Department of Obstetrics and Gynecology, Unit for Human Reproduction, School of Medicine, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Ring Road, Nea Efkarpia, 56403 Thessaloniki, Greece
| | - Maria Syrrou
- Department of Biology, Laboratory of Biology, School of Health Sciences, University of Ioannina, Dourouti University Campus, 45110, Ioannina, Greece
| | - Alexandros Lambropoulos
- First Department of Obstetrics and Gynecology, Laboratory of Genetics, School of Medicine, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Ring Road, Nea Efkarpia, 56403 Thessaloniki, Greece
| |
Collapse
|
14
|
Yu W, Shi Q, Wu C, Shen X, Chen L, Xu J. Promoter hypermethylation influences the suppressive role of long non-coding RNA MEG3 in the development of multiple myeloma. Exp Ther Med 2020; 20:637-645. [PMID: 32537021 DOI: 10.3892/etm.2020.8723] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Accepted: 12/31/2019] [Indexed: 12/12/2022] Open
Abstract
Methylation is a fundamental regulator of gene transcription. Long non-coding RNA maternally expressed 3 (MEG3) inhibits cell proliferation in various types of cancer. However, the molecular mechanisms of MEG3 methylation in the regulation of multiple myeloma (MM) are unknown. In the present study, MEG3 upregulation was negatively associated with the International Staging System (ISS) status of the bone marrow samples of 39 patients with MM. MEG3 overexpression in an MM cell line resulted in elevated p53 expression. Furthermore, the results of methylation-specific PCR revealed that the abnormal methylation status of the MEG3 promoter region was present in eight of the 39 bone marrow samples collected. Treatment of the MM cell line with the DNA methylation inhibitor 5-Aza-2'-deoxycytidine (5-Aza-CdR) resulted in tumor cell proliferation inhibition, apoptosis induction and G0/G1 cell cycle arrest. Furthermore, 5-Aza-CdR decreased aberrant hypermethylation of the MEG3 promoter and increased the expression of MEG3. However, 5-Aza-CdR exerted no effect on p53 expression. To the best of our knowledge, the present study is the first to report that the demethylation reagent 5-Aza-CdR may serve as a therapeutic agent in MM by upregulating MEG3 expression. However, the mechanism of action was independent of p53 expression.
Collapse
Affiliation(s)
- Wenjun Yu
- Department of Geriatric Medicine, Geriatric Hospital of Nanjing Medical University, Jiangsu Province Geriatric Institute, Nanjing, Jiangsu 210000, P.R. China.,Department of Hematology, First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, Jiangsu 210000, P.R. China
| | - Qinglin Shi
- Department of Hematology, First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, Jiangsu 210000, P.R. China
| | - Chao Wu
- Department of Hematology, First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, Jiangsu 210000, P.R. China
| | - Xuxing Shen
- Department of Hematology, First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, Jiangsu 210000, P.R. China
| | - Lijuan Chen
- Department of Hematology, First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, Jiangsu 210000, P.R. China
| | - Jiaren Xu
- Department of Geriatric Medicine, Geriatric Hospital of Nanjing Medical University, Jiangsu Province Geriatric Institute, Nanjing, Jiangsu 210000, P.R. China
| |
Collapse
|
15
|
Job S, Georges A, Burnichon N, Buffet A, Amar L, Bertherat J, Bouatia-Naji N, de Reyniès A, Drui D, Lussey-Lepoutre C, Favier J, Gimenez-Roqueplo AP, Castro-Vega LJ. Transcriptome Analysis of lncRNAs in Pheochromocytomas and Paragangliomas. J Clin Endocrinol Metab 2020; 105:5611198. [PMID: 31678991 DOI: 10.1210/clinem/dgz168] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 10/31/2019] [Indexed: 12/14/2022]
Abstract
CONTEXT Pheochromocytomas and paragangliomas (PPGLs) are neuroendocrine tumors explained by germline or somatic mutations in about 70% of cases. Patients with SDHB mutations are at high risk of developing metastatic disease, yet no reliable tumor biomarkers are available to predict tumor aggressiveness. OBJECTIVE We aimed at identifying long noncoding RNAs (lncRNAs) specific for PPGL molecular groups and metastatic progression. DESIGN AND METHODS To analyze the expression of lncRNAs, we used a mining approach of transcriptome data from a well-characterized series of 187 tumor tissues. Clustering consensus analysis was performed to determine a lncRNA-based classification, and informative transcripts were validated in an independent series of 51 PPGLs. The expression of metastasis-related lncRNAs was confirmed by RT-qPCR. Receiver operating characteristic (ROC) curve analysis was used to estimate the predictive accuracy of potential markers. MAIN OUTCOME MEASURE Univariate/multivariate and metastasis-free survival (MFS) analyses were carried out for the assessment of risk factors and clinical outcomes. RESULTS Four lncRNA-based subtypes strongly correlated with mRNA expression clusters (chi-square P-values from 1.38 × 10-32 to 1.07 × 10-67). We identified one putative lncRNA (GenBank: BC063866) that accurately discriminates metastatic from benign tumors in patients with SDHx mutations (area under the curve 0.95; P = 4.59 × 10-05). Moreover, this transcript appeared as an independent risk factor associated with poor clinical outcome of SDHx carriers (log-rank test P = 2.29 × 10-05). CONCLUSION Our findings extend the spectrum of transcriptional dysregulations in PPGL to lncRNAs and provide a novel biomarker that could be useful to identify potentially metastatic tumors in patients carrying SDHx mutations.
Collapse
Affiliation(s)
- Sylvie Job
- Programme Cartes d'Identité des Tumeurs, Ligue Nationale Contre Le Cancer, Paris, France
| | - Adrien Georges
- Paris University, PARCC, INSERM, Equipe labellisée par la Ligue contre le cancer, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, Paris, France
| | - Nelly Burnichon
- Paris University, PARCC, INSERM, Equipe labellisée par la Ligue contre le cancer, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, Paris, France
- Genetics department, AP-HP, Hôpital européen Georges Pompidou, Paris France
| | - Alexandre Buffet
- Paris University, PARCC, INSERM, Equipe labellisée par la Ligue contre le cancer, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, Paris, France
| | - Laurence Amar
- Paris University, PARCC, INSERM, Equipe labellisée par la Ligue contre le cancer, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, Paris, France
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Hypertension unit, Paris, France
| | - Jérôme Bertherat
- INSERM, U1016, Institut Cochin, Paris, France. 10 CNRS UMR8104, Paris, France
- Rare Adrenal Cancer Network COMETE, Paris, France
| | - Nabila Bouatia-Naji
- Paris University, PARCC, INSERM, Equipe labellisée par la Ligue contre le cancer, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, Paris, France
| | - Aurélien de Reyniès
- Programme Cartes d'Identité des Tumeurs, Ligue Nationale Contre Le Cancer, Paris, France
| | - Delphine Drui
- Service d'Endocrinologie, Diabétologie et Maladies Métaboliques, L'institut du Thorax, Centre Hospitalier Universitaire de Nantes, Hôpital Nord Laënnec, Nantes, France
| | - Charlotte Lussey-Lepoutre
- Paris University, PARCC, INSERM, Equipe labellisée par la Ligue contre le cancer, Paris, France
- Sorbonne Université, Pitié-Salpêtrière Hospital, Department of nuclear medicine, Paris, France
| | - Judith Favier
- Paris University, PARCC, INSERM, Equipe labellisée par la Ligue contre le cancer, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, Paris, France
| | - Anne-Paule Gimenez-Roqueplo
- Paris University, PARCC, INSERM, Equipe labellisée par la Ligue contre le cancer, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, Paris, France
- Genetics department, AP-HP, Hôpital européen Georges Pompidou, Paris France
- Rare Adrenal Cancer Network COMETE, Paris, France
| | - Luis Jaime Castro-Vega
- Paris University, PARCC, INSERM, Equipe labellisée par la Ligue contre le cancer, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine, Paris, France
| |
Collapse
|
16
|
Maternally expressed gene 3 (MEG3): A tumor suppressor long non coding RNA. Biomed Pharmacother 2019; 118:109129. [PMID: 31326791 DOI: 10.1016/j.biopha.2019.109129] [Citation(s) in RCA: 115] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/10/2019] [Accepted: 06/12/2019] [Indexed: 12/12/2022] Open
Abstract
Maternally expressed gene 3 (MEG3) is a long non-coding RNA (lncRNA) located on chromosome 14q32.3. Direct sequencing experiments have shown monoallelic expression of this lncRNA. Several studies have shown down-regulation of this lncRNA in human cancers. In some cases, hypermethylation of the promoter region has been suggested as the underlying mechanism. Functional studies have shown that this lncRNA controls expression of several tumor suppressor genes and oncogenes among them are p53, RB, MYC and TGF-β. Through regulation of Wnt-β-catenin pathway, it also affects epithelial-mesenchymal transition. In vitro studies have demonstrated contribution of MEG3 in defining response to chemotherapeutic agents such as paclitaxel, cisplatin and oxaliplatin. Certain polymorphisms within MEG3 are implicated in cancer risk (rs7158663, rs4081134 and rs11160608) or therapeutic response of cancer patients (rs10132552). Taken together, this lncRNA is regarded as a putative cancer biomarker and treatment target. In the current review, several aspects of the participation of MEG3 in carcinogenesis are discussed.
Collapse
|
17
|
Huan T, Mendelson M, Joehanes R, Yao C, Liu C, Song C, Bhattacharya A, Rong J, Tanriverdi K, Keefe J, Murabito JM, Courchesne P, Larson MG, Freedman JE, Levy D. Epigenome-wide association study of DNA methylation and microRNA expression highlights novel pathways for human complex traits. Epigenetics 2019; 15:183-198. [PMID: 31282290 DOI: 10.1080/15592294.2019.1640547] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
DNA methylation (DNAm) and microRNAs (miRNAs) have been implicated in a wide-range of human diseases. While often studied in isolation, DNAm and miRNAs are not independent. We analyzed associations of expression of 283 miRNAs with DNAm at >400K CpG sites in whole blood obtained from 3565 individuals and identified 227 CpGs at which differential methylation was associated with the expression of 40 nearby miRNAs (cis-miR-eQTMs) at FDR<0.01, including 91 independent CpG sites at r2 < 0.2. cis-miR-eQTMs were enriched for CpGs in promoter and polycomb-repressed state regions, and 60% were inversely associated with miRNA expression. Bidirectional Mendelian randomization (MR) analysis further identified 58 cis-miR-eQTMCpG-miRNA pairs where DNAm changes appeared to drive miRNA expression changes and opposite directional effects were unlikely. Integration of genetic variants in joint analyses revealed an average partial between cis-miR-eQTM CpGs and miRNAs of 2% after conditioning on site-specific genetic variation, suggesting that DNAm is an important epigenetic regulator of miRNA expression. Finally, two-step MR analysis was performed to identify putatively causal CpGs driving miRNA expression in relation to human complex traits. We found that an imprinted region on 14q32 that was previously identified in relation to age at menarche is enriched with cis-miR-eQTMs. Nine CpGs and three miRNAs at this locus tested causal for age at menarche, reflecting novel epigenetic-driven molecular pathways underlying this complex trait. Our study sheds light on the joint genetic and epigenetic regulation of miRNA expression and provides insights into the relations of miRNAs to their targets and to complex phenotypes.
Collapse
Affiliation(s)
- Tianxiao Huan
- The National Heart, Lung, and Blood Institute, Boston University's Framingham Heart Study, Framingham, MA, USA.,The Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, MD, USA
| | - Michael Mendelson
- The National Heart, Lung, and Blood Institute, Boston University's Framingham Heart Study, Framingham, MA, USA.,The Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, MD, USA
| | - Roby Joehanes
- The National Heart, Lung, and Blood Institute, Boston University's Framingham Heart Study, Framingham, MA, USA.,The Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, MD, USA
| | - Chen Yao
- The National Heart, Lung, and Blood Institute, Boston University's Framingham Heart Study, Framingham, MA, USA.,The Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, MD, USA
| | - Chunyu Liu
- The National Heart, Lung, and Blood Institute, Boston University's Framingham Heart Study, Framingham, MA, USA.,The Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, MD, USA.,Department of Biostatistics, Boston University School of Public Health, Boston University, Boston, MA, USA
| | - Ci Song
- The National Heart, Lung, and Blood Institute, Boston University's Framingham Heart Study, Framingham, MA, USA.,The Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, MD, USA
| | - Anindya Bhattacharya
- Department of Computer Science and Engineering, University of California, San Diego, CA, USA
| | - Jian Rong
- Department of Mathematics and Statistics, Boston University, Boston, MA, USA
| | - Kahraman Tanriverdi
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Joshua Keefe
- The National Heart, Lung, and Blood Institute, Boston University's Framingham Heart Study, Framingham, MA, USA.,The Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, MD, USA
| | - Joanne M Murabito
- The National Heart, Lung, and Blood Institute, Boston University's Framingham Heart Study, Framingham, MA, USA.,Department of Medicine, Section of General Internal Medicine, Boston University School of Medicine, Boston, MA, USA
| | - Paul Courchesne
- The National Heart, Lung, and Blood Institute, Boston University's Framingham Heart Study, Framingham, MA, USA.,The Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, MD, USA
| | - Martin G Larson
- The National Heart, Lung, and Blood Institute, Boston University's Framingham Heart Study, Framingham, MA, USA.,Department of Mathematics and Statistics, Boston University, Boston, MA, USA
| | - Jane E Freedman
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Daniel Levy
- The National Heart, Lung, and Blood Institute, Boston University's Framingham Heart Study, Framingham, MA, USA.,The Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, MD, USA
| |
Collapse
|
18
|
Anvar Z, Acurzio B, Roma J, Cerrato F, Verde G. Origins of DNA methylation defects in Wilms tumors. Cancer Lett 2019; 457:119-128. [PMID: 31103718 DOI: 10.1016/j.canlet.2019.05.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 05/10/2019] [Accepted: 05/13/2019] [Indexed: 12/14/2022]
Abstract
Wilms tumor is an embryonic renal cancer that typically presents in early childhood and accounts for 7% of all paediatric cancers. Different genetic alterations have been described in this malignancy, however, only a few of them are associated with a majority of Wilms tumors. Alterations in DNA methylation, in contrast, are frequent molecular defects observed in most cases of Wilms tumors. How these epimutations are established in this tumor is not yet completely clear. The recent identification of the molecular actors required for the epigenetic reprogramming during embryogenesis suggests novel possible mechanisms responsible for the DNA methylation defects in Wilms tumor. Here, we provide an overview of the DNA methylation alterations observed in this malignancy and discuss the distinct molecular mechanisms by which these epimutations can arise.
Collapse
Affiliation(s)
- Zahra Anvar
- Infertility Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; Institute of Genetics and Biophysics 'A. Buzzati-Traverso', CNR, Naples, Italy
| | - Basilia Acurzio
- Institute of Genetics and Biophysics 'A. Buzzati-Traverso', CNR, Naples, Italy; Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania 'Luigi Vanvitelli', Caserta, Italy
| | - Josep Roma
- Vall d'Hebron Research Institute-Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Flavia Cerrato
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania 'Luigi Vanvitelli', Caserta, Italy
| | - Gaetano Verde
- Faculty of Medicine and Health Sciences, International University of Catalonia, Sant Cugat del Vallès, Barcelona, Spain.
| |
Collapse
|
19
|
Bar S, Benvenisty N. Epigenetic aberrations in human pluripotent stem cells. EMBO J 2019; 38:embj.2018101033. [PMID: 31088843 DOI: 10.15252/embj.2018101033] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 03/13/2019] [Accepted: 03/15/2019] [Indexed: 12/14/2022] Open
Abstract
Human pluripotent stem cells (hPSCs) are being increasingly utilized worldwide in investigating human development, and modeling and discovering therapies for a wide range of diseases as well as a source for cellular therapy. Yet, since the first isolation of human embryonic stem cells (hESCs) 20 years ago, followed by the successful reprogramming of human-induced pluripotent stem cells (hiPSCs) 10 years later, various studies shed light on abnormalities that sometimes accumulate in these cells in vitro Whereas genetic aberrations are well documented, epigenetic alterations are not as thoroughly discussed. In this review, we highlight frequent epigenetic aberrations found in hPSCs, including alterations in DNA methylation patterns, parental imprinting, and X chromosome inactivation. We discuss the potential origins of these abnormalities in hESCs and hiPSCs, survey the different methods for detecting them, and elaborate on their potential consequences for the different utilities of hPSCs.
Collapse
Affiliation(s)
- Shiran Bar
- Department of Genetics, The Azrieli Center for Stem Cells and Genetic Research, Silberman Institute of Life Sciences, The Hebrew University, Jerusalem, Israel
| | - Nissim Benvenisty
- Department of Genetics, The Azrieli Center for Stem Cells and Genetic Research, Silberman Institute of Life Sciences, The Hebrew University, Jerusalem, Israel
| |
Collapse
|
20
|
Perrera V, Martello G. How Does Reprogramming to Pluripotency Affect Genomic Imprinting? Front Cell Dev Biol 2019; 7:76. [PMID: 31143763 PMCID: PMC6521591 DOI: 10.3389/fcell.2019.00076] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 04/18/2019] [Indexed: 01/14/2023] Open
Abstract
Human induced Pluripotent Stem Cells (hiPSCs) have the capacity to generate a wide range of somatic cells, thus representing an ideal tool for regenerative medicine. Patient-derived hiPSCs are also used for in vitro disease modeling and drug screenings. Several studies focused on the identification of DNA mutations generated, or selected, during the derivation of hiPSCs, some of which are known to drive cancer formation. Avoiding such stable genomic aberrations is paramount for successful use of hiPSCs, but it is equally important to ensure that their epigenetic information is correct, given the critical role of epigenetics in transcriptional regulation and its involvement in a plethora of pathologic conditions. In this review we will focus on genomic imprinting, a prototypical epigenetic mechanism whereby a gene is expressed in a parent-of-origin specific manner, thanks to the differential methylation of specific DNA sequences. Conventional hiPSCs are thought to be in a pluripotent state primed for differentiation. They display a hypermethylated genome with an unexpected loss of DNA methylation at imprinted loci. Several groups recently reported the generation of hiPSCs in a more primitive developmental stage, called naïve pluripotency. Naïve hiPSCs share several features with early human embryos, such as a global genome hypomethylation, which is also accompanied by a widespread loss of DNA methylation at imprinted loci. Given that loss of imprinting has been observed in genetic developmental disorders as well as in a wide range of cancers, it is fundamental to make sure that hiPSCs do not show such epigenetic aberrations. We will discuss what specific imprinted genes, associated with human pathologies, have been found commonly misregulated in hiPSCs and suggest strategies to effectively detect and avoid such undesirable epigenetic abnormalities.
Collapse
Affiliation(s)
- Valentina Perrera
- Department of Molecular Medicine, School of Medicine and Surgery, University of Padova, Padua, Italy
| | - Graziano Martello
- Department of Molecular Medicine, School of Medicine and Surgery, University of Padova, Padua, Italy
| |
Collapse
|
21
|
Chan WH, Komada M, Fukushima T, Southard-Smith EM, Anderson CR, Wakefield MJ. RNA-seq of Isolated Chromaffin Cells Highlights the Role of Sex-Linked and Imprinted Genes in Adrenal Medulla Development. Sci Rep 2019; 9:3929. [PMID: 30850723 PMCID: PMC6408553 DOI: 10.1038/s41598-019-40501-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 02/15/2019] [Indexed: 12/20/2022] Open
Abstract
Adrenal chromaffin cells and sympathetic neurons synthesize and release catecholamines, and both cell types are derived from neural crest precursors. However, they have different developmental histories, with sympathetic neurons derived directly from neural crest precursors while adrenal chromaffin cells arise from neural crest-derived cells that express Schwann cell markers. We have sought to identify the genes, including imprinted genes, which regulate the development of the two cell types in mice. We developed a method of separating the two cell types as early as E12.5, using differences in expression of enhanced yellow fluorescent protein driven from the tyrosine hydroxylase gene, and then used RNA sequencing to confirm the characteristic molecular signatures of the two cell types. We identified genes differentially expressed by adrenal chromaffin cells and sympathetic neurons. Deletion of a gene highly expressed by adrenal chromaffin cells, NIK-related kinase, a gene on the X-chromosome, results in reduced expression of adrenaline-synthesizing enzyme, phenyl-N-methyl transferase, by adrenal chromaffin cells and changes in cell cycle dynamics. Finally, many imprinted genes are up-regulated in chromaffin cells and may play key roles in their development.
Collapse
Affiliation(s)
- Wing Hei Chan
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Australia.
| | - Masayuki Komada
- Cell Biology Center, Institute of Innovative Research, Tokyo Institute of Technology, Tokyo, Japan
| | - Toshiaki Fukushima
- Cell Biology Center, Institute of Innovative Research, Tokyo Institute of Technology, Tokyo, Japan
| | | | - Colin R Anderson
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Australia
| | - Matthew J Wakefield
- Melbourne Bioinformatics, University of Melbourne, Melbourne, Australia. .,Walter and Eliza Hall Institute, Parkville, Australia.
| |
Collapse
|
22
|
Li J, Shen H, Xie H, Ying Y, Jin K, Yan H, Wang S, Xu M, Wang X, Xu X, Xie L. Dysregulation of ncRNAs located at the DLK1‑DIO3 imprinted domain: involvement in urological cancers. Cancer Manag Res 2019; 11:777-787. [PMID: 30697070 PMCID: PMC6339654 DOI: 10.2147/cmar.s190764] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Genomic imprinting has been found to be involved in human physical development and several diseases. The DLK1-DIO3 imprinted domain is located on human chromosome 14 and contains paternally expressed protein-coding genes (DLK1, RTL1, DIO3) and numerous maternally expressed ncRNA genes (MEG3, MEG8, antisense RTL1, miRNAs, piRNAs, and snoRNAs). Emerging evidence has implicated that dysregulation of the DLK1-DIO3 imprinted domain especially the imprinted ncRNAs is critical for tumor progressions. Multiple miRNAs and lncRNAs have been investigated in urological cancers, of which several are transcribed from this domain. In this review, we present current data about the associated miRNAs, lncRNAs, and piRNAs and the regulation of differentially methylated regions methylation status in the progression of urological cancers and preliminarily propose certain concepts about the potential regulatory networks involved in DLK1-DIO3 imprinted domain.
Collapse
Affiliation(s)
- Jiangfeng Li
- Department of Urology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China, ;
| | - Haixiang Shen
- Department of Urology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China, ;
| | - Haiyun Xie
- Department of Urology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China, ;
| | - Yufan Ying
- Department of Urology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China, ;
| | - Ke Jin
- Department of Urology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China, ;
| | - Huaqing Yan
- Department of Urology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China, ;
| | - Song Wang
- Department of Urology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China, ;
| | - Mingjie Xu
- Department of Urology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China, ;
| | - Xiao Wang
- Department of Urology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China, ;
| | - Xin Xu
- Department of Urology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China, ;
| | - Liping Xie
- Department of Urology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China, ;
| |
Collapse
|
23
|
Tindula G, Murphy SK, Grenier C, Huang Z, Huen K, Escudero-Fung M, Bradman A, Eskenazi B, Hoyo C, Holland N. DNA methylation of imprinted genes in Mexican-American newborn children with prenatal phthalate exposure. Epigenomics 2018; 10:1011-1026. [PMID: 29957030 PMCID: PMC6088267 DOI: 10.2217/epi-2017-0178] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Accepted: 03/28/2018] [Indexed: 02/06/2023] Open
Abstract
AIM Imprinted genes exhibit expression in a parent-of-origin-dependent manner and are critical for child development. Recent limited evidence suggests that prenatal exposure to phthalates, ubiquitous endocrine disruptors, can affect their epigenetic dysregulation. MATERIALS & METHODS We quantified DNA methylation of nine imprinted gene differentially methylated regions by pyrosequencing in 296 cord blood DNA samples in a Mexican-American cohort. Fetal exposure was estimated by phthalate metabolite concentrations in maternal urine samples during pregnancy. RESULTS Several differentially methylated regions of imprinted genes were associated with high molecular weight phthalates. The most consistent, positive, and false discovery rate significant associations were observed for MEG3. CONCLUSION Phthalate exposure in utero may affect methylation status of imprinted genes in newborn children.
Collapse
Affiliation(s)
- Gwen Tindula
- Center for Environmental Research & Children's Health (CERCH), School of Public Health, University of California, Berkeley, CA 94720, USA
| | - Susan K Murphy
- Epigenetics Research Laboratory, Department of Obstetrics & Gynecology, Duke University Medical Center, Durham, NC 27708, USA
| | - Carole Grenier
- Epigenetics Research Laboratory, Department of Obstetrics & Gynecology, Duke University Medical Center, Durham, NC 27708, USA
| | - Zhiqing Huang
- Epigenetics Research Laboratory, Department of Obstetrics & Gynecology, Duke University Medical Center, Durham, NC 27708, USA
| | - Karen Huen
- Center for Environmental Research & Children's Health (CERCH), School of Public Health, University of California, Berkeley, CA 94720, USA
| | - Maria Escudero-Fung
- Center for Environmental Research & Children's Health (CERCH), School of Public Health, University of California, Berkeley, CA 94720, USA
| | - Asa Bradman
- Center for Environmental Research & Children's Health (CERCH), School of Public Health, University of California, Berkeley, CA 94720, USA
| | - Brenda Eskenazi
- Center for Environmental Research & Children's Health (CERCH), School of Public Health, University of California, Berkeley, CA 94720, USA
| | - Cathrine Hoyo
- Epigenetics Research Laboratory, Department of Obstetrics & Gynecology, Duke University Medical Center, Durham, NC 27708, USA
- Department of Biological Sciences, Center for Human Health & the Environment, North Carolina State University (NCSU), Raleigh, NC 27606, USA
| | - Nina Holland
- Center for Environmental Research & Children's Health (CERCH), School of Public Health, University of California, Berkeley, CA 94720, USA
| |
Collapse
|
24
|
Li R, Fang L, Pu Q, Bu H, Zhu P, Chen Z, Yu M, Li X, Weiland T, Bansal A, Ye SQ, Wei Y, Jiang J, Wu M. MEG3-4 is a miRNA decoy that regulates IL-1β abundance to initiate and then limit inflammation to prevent sepsis during lung infection. Sci Signal 2018; 11:11/536/eaao2387. [PMID: 29945883 DOI: 10.1126/scisignal.aao2387] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Long noncoding RNAs (lncRNAs) regulate gene expression. We investigated the role of lncRNAs in the inflammatory response to bacterial infection in the lungs. We identified the lncRNA MEG3 as a tissue-specific modulator of inflammatory responses during bacterial infection. Among the 10 transcript isoforms of MEG3, transcript 4 (referred to as MEG3-4) encodes the isoform with the lowest abundance in mouse lungs. Nonetheless, we found that MEG3-4 bound to the microRNA miR-138 in a competitive manner with mRNA encoding the proinflammatory cytokine interleukin-1β (IL-1β), thereby increasing IL-1β abundance and intensifying inflammatory responses to bacterial infection in alveolar macrophages and lung epithelial cells in culture and in lung tissue in mice. MEG3-4-mediated sponging of miR-138 in the cytoplasm increased the autocrine activity of IL-1β that subsequently induced a negative feedback mechanism mediated by nuclear factor κB that decreased MEG3-4 abundance and inflammatory cytokine production. This timely reduction in MEG3-4 abundance tempered proinflammatory responses in mice with pulmonary bacterial infection, preventing the progression to sepsis. Together, these findings reveal that MEG3-4 dynamically modulates pulmonary inflammatory responses through transcriptional regulation of immune response genes, extending the decoy and sponge mechanism associated with lncRNAs to antibacterial immunity, which affects both response and disease progression.
Collapse
Affiliation(s)
- Rongpeng Li
- Key Laboratory of Biotechnology for Medicinal Plants of Jiangsu Province and School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P. R. China.,Department of Biomedical Sciences, University of North Dakota, Grand Forks, ND 58203-9037, USA
| | - Lizhu Fang
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, ND 58203-9037, USA
| | - Qinqin Pu
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, ND 58203-9037, USA.,State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, Sichuan 610041, P. R. China
| | - Huimin Bu
- Key Laboratory of Biotechnology for Medicinal Plants of Jiangsu Province and School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P. R. China
| | - Pengcheng Zhu
- Key Laboratory of Biotechnology for Medicinal Plants of Jiangsu Province and School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P. R. China
| | - Zihan Chen
- Key Laboratory of Biotechnology for Medicinal Plants of Jiangsu Province and School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P. R. China
| | - Min Yu
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, ND 58203-9037, USA
| | - Xuefeng Li
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, ND 58203-9037, USA
| | | | | | - Shui Qing Ye
- Department of Pediatrics and Department of Biomedical and Health Informatics, Children's Mercy Hospital, University of Missouri-Kansas City School of Medicine, Kansas City, MO 64108, USA
| | - Yuquan Wei
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, Sichuan 610041, P. R. China
| | - Jianxin Jiang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, Sichuan 400042, P. R. China.
| | - Min Wu
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, ND 58203-9037, USA. .,State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, Sichuan 610041, P. R. China
| |
Collapse
|
25
|
Hernandez A, Stohn JP. The Type 3 Deiodinase: Epigenetic Control of Brain Thyroid Hormone Action and Neurological Function. Int J Mol Sci 2018; 19:ijms19061804. [PMID: 29921775 PMCID: PMC6032375 DOI: 10.3390/ijms19061804] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 06/13/2018] [Accepted: 06/15/2018] [Indexed: 12/31/2022] Open
Abstract
Thyroid hormones (THs) influence multiple processes in the developing and adult central nervous system, and their local availability needs to be maintained at levels that are tailored to the requirements of their biological targets. The local complement of TH transporters, deiodinase enzymes, and receptors is critical to ensure specific levels of TH action in neural cells. The type 3 iodothyronine deiodinase (DIO3) inactivates THs and is highly present in the developing and adult brain, where it limits their availability and action. DIO3 deficiency in mice results in a host of neurodevelopmental and behavioral abnormalities, demonstrating the deleterious effects of TH excess, and revealing the critical role of DIO3 in the regulation of TH action in the brain. The fact the Dio3 is an imprinted gene and that its allelic expression pattern varies across brain regions and during development introduces an additional level of control to deliver specific levels of hormone action in the central nervous system (CNS). The sensitive epigenetic nature of the mechanisms controlling the genomic imprinting of Dio3 renders brain TH action particularly susceptible to disruption due to exogenous treatments and environmental exposures, with potential implications for the etiology of human neurodevelopmental disorders.
Collapse
Affiliation(s)
- Arturo Hernandez
- Center for Molecular Medicine, Maine Medical Center Research Institute, Maine Medical Center, Scarborough, ME 04074, USA.
- Graduate School for Biomedical Science and Engineering, University of Maine, Orono, ME 04469, USA.
- Department of Medicine, Tufts University School of Medicine, Boston, MA 02111, USA.
| | - J Patrizia Stohn
- Center for Molecular Medicine, Maine Medical Center Research Institute, Maine Medical Center, Scarborough, ME 04074, USA.
| |
Collapse
|
26
|
Cao Y, Jin Y, Yu J, Wang J, Qiu Y, Duan X, Ye Y, Cheng Y, Dong L, Feng X, Wang D, Li Z, Tian X, Wang H, Yan J, Zhao Q. Clinical evaluation of integrated panel testing by next-generation sequencing for somatic mutations in neuroblastomas with MYCN unamplification. Oncotarget 2018; 8:49689-49701. [PMID: 28591696 PMCID: PMC5564799 DOI: 10.18632/oncotarget.17917] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 05/01/2017] [Indexed: 11/25/2022] Open
Abstract
Neuroblastomas (NBs) exhibit heterogeneity and show clinically significant prognosis classified by genetic alterations. Among prognostic genes or genome factors, MYCN amplification (MNA) is the most established genomic marker of poor prognosis in patients with NB. However, the prognostic classification of more than 60% of patients without MNA has yet to be clarified. In this study, the application of target next-generation sequencing (NGS) was extended on the basis of a comprehensive panel of regions where copy number variations (CNVs) or point mutations occurred to improve the prognostic evaluation of these patients and obtain the sequence of 33 patients without MNA. A mean coverage depth of 887× was determined in the target regions in all of the samples, and the mapped read percentage was more than 99%. Somatic mutations in patients without MNA could be precisely defined on the basis of these findings, and 17 unique somatic aberrations, including 14 genes, were identified in 11 patients. Among these variations, most were CNVs with a number of 13. The 3-year event-free survival (EFS) of CNV(−) patients was 60.0% compared with the EFS (16.7%) of CNV(+) patients (P = 0.015, HR = 0.1344, 95%, CI = 0.027 to 0.678). CNVs were also associated with unfavorable histological characteristics (P = 0.003) and likely to occur in stage 4 (P = 0.041). These results might further indicate the role of CNVs in NB chemotherapy resistance (P = 0.059) and show CNVs as a therapeutic target. In multivariate analysis, the presence of CNVs was a clinically negative prognostic marker that impaired the outcome of patients without MNA and associated with poor prognosis in this tumor subset. Comprehensive genetic/genomic profiling instead of focusing on single genetic marker should be performed through in-depth NGS that could reveal prognostic information, improve NB target therapy, and provide a basis for investigations on NB pathogenesis.
Collapse
Affiliation(s)
- Yanna Cao
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Yan Jin
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Jinpu Yu
- Department of Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Jingfu Wang
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Yanli Qiu
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Xiaofeng Duan
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Yingnan Ye
- Department of Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Yanan Cheng
- Department of Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Li Dong
- Department of Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Xiaolong Feng
- Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, 300060, P.R. China
| | - Daowei Wang
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Zhongyuan Li
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Xiangdong Tian
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Huijuan Wang
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Jie Yan
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Qiang Zhao
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| |
Collapse
|
27
|
A Regulatory Circuitry Between Gria2, miR-409, and miR-495 Is Affected by ALS FUS Mutation in ESC-Derived Motor Neurons. Mol Neurobiol 2018; 55:7635-7651. [PMID: 29430619 PMCID: PMC6132778 DOI: 10.1007/s12035-018-0884-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 01/08/2018] [Indexed: 12/12/2022]
Abstract
Mutations in fused in sarcoma (FUS) cause amyotrophic lateral sclerosis (ALS). FUS is a multifunctional protein involved in the biogenesis and activity of several types of RNAs, and its role in the pathogenesis of ALS may involve both direct effects of disease-associated mutations through gain- and loss-of-function mechanisms and indirect effects due to the cross talk between different classes of FUS-dependent RNAs. To explore how FUS mutations impinge on motor neuron-specific RNA-based circuitries, we performed transcriptome profiling of small and long RNAs of motor neurons (MNs) derived from mouse embryonic stem cells carrying a FUS-P517L knock-in mutation, which is equivalent to human FUS-P525L, associated with a severe and juvenile-onset form of ALS. Combining ontological, predictive and molecular analyses, we found an inverse correlation between several classes of deregulated miRNAs and their corresponding mRNA targets in both homozygous and heterozygous P517L MNs. We validated a circuitry in which the upregulation of miR-409-3p and miR-495-3p, belonging to a brain-specific miRNA subcluster implicated in several neurodevelopmental disorders, produced the downregulation of Gria2, a subunit of the glutamate α‐amino‐3‐hydroxy‐5‐methyl-4-isoxazole propionic acid (AMPA) receptor with a significant role in excitatory neurotransmission. Moreover, we found that FUS was involved in mediating such miRNA repression. Gria2 alteration has been proposed to be implicated in MN degeneration, through disturbance of Ca2+ homeostasis, which triggers a cascade of damaging “excitotoxic” events. The molecular cross talk identified highlights a role for FUS in excitotoxicity and in miRNA-dependent regulation of Gria2. This circuitry also proved to be deregulated in heterozygosity, which matches the human condition perfectly.
Collapse
|
28
|
Imprinting defects at human 14q32 locus alters gene expression and is associated with the pathobiology of osteosarcoma. Oncotarget 2018; 7:21298-314. [PMID: 26802029 PMCID: PMC5008286 DOI: 10.18632/oncotarget.6965] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 11/25/2015] [Indexed: 11/25/2022] Open
Abstract
Osteosarcoma is the most common primary bone malignancy affecting children and adolescents. Although several genetic predisposing conditions have been associated with osteosarcoma, our understanding of its pathobiology is rather limited. Here we show that, first, an imprinting defect at human 14q32-locus is highly prevalent (87%) and specifically associated with osteosarcoma patients < 30 years of age. Second, the average demethylation at differentially methylated regions (DMRs) in the 14q32-locus varied significantly compared to genome-wide demethylation. Third, the 14q32-locus was enriched in both H3K4-me3 and H3K27-me3 histone modifications that affected expression of all imprinted genes and miRNAs in this region. Fourth, imprinting defects at 14q32 - DMRs are present in triad DNA samples from affected children and their biological parents. Finally, imprinting defects at 14q32-DMRs were also observed at higher frequencies in an Rb1/Trp53 mutation-induced osteosarcoma mouse model. Further analysis of normal and tumor tissues from a Sleeping Beauty mouse model of spontaneous osteosarcoma supported the notion that these imprinting defects may be a key factor in osteosarcoma pathobiology. In conclusion, we demonstrate that imprinting defects at the 14q32 locus significantly alter gene expression, may contribute to the pathogenesis of osteosarcoma, and could be predictive of survival outcomes.
Collapse
|
29
|
Gao Y, Huang P, Zhang J. Hypermethylation of MEG3 promoter correlates with inactivation of MEG3 and poor prognosis in patients with retinoblastoma. J Transl Med 2017; 15:268. [PMID: 29287592 PMCID: PMC5747938 DOI: 10.1186/s12967-017-1372-8] [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: 07/26/2017] [Accepted: 12/19/2017] [Indexed: 01/01/2023] Open
Abstract
Background In our previous study, we revealed that MEG3 was a tumor suppressor gene in retinoblastoma and inhibited proliferation of retinoblastoma cells by regulating the activity of the Wnt/β-catenin pathway. Here, we further explored the mechanism of MEG3 inactivation in retinoblastoma. Methods MSP and qRT-PCR were performed to detect the methylation status of MEG3 promoter and levels of MEG3 expression, respective. To further explore relationship between MEG3 expression and epigenetic modifications, 5-Aza-CdR was used to interfere with DNA methylation. In addition, we evaluated proliferation, apoptosis and the expression of β-catenin via CCK-8, flow cytometric analysis and western blot analysis, respective. Results Hypermethylation of MEG3 promoter was observed more frequently in retinoblastoma tissues and was highly associated with low MEG3 expression and poor survival of retinoblastoma patients. We also provided evidence demonstrating that hypermethylation of MEG3 promoter depressed MEG3 expression, promoted proliferation, inhibited apoptosis and increased β-catenin expression of retinoblastoma cells in vitro. Conclusions Our present study indicates that promoter silencing by hypermethylation may account for the loss of MEG3 expression and predict poor prognosis.
Collapse
Affiliation(s)
- Yali Gao
- Department of Ophthalmology, The Second Clinical Medical College (Shenzhen People's Hospital), Jinan University, Shenzhen, 518020, People's Republic of China
| | - Peng Huang
- Department of Ophthalmology, The Second Clinical Medical College (Shenzhen People's Hospital), Jinan University, Shenzhen, 518020, People's Republic of China
| | - Jun Zhang
- Department of Obstetrics and Gynecology, The Second Clinical Medical College (Shenzhen People's Hospital), Jinan University, Shenzhen, 518020, People's Republic of China.
| |
Collapse
|
30
|
Chen H, Zhang K, Lu J, Wu G, Yang H, Chen K. Comprehensive analysis of mRNA-lncRNA co-expression profile revealing crucial role of imprinted gene cluster DLK1-MEG3 in chordoma. Oncotarget 2017; 8:112623-112635. [PMID: 29348851 PMCID: PMC5762536 DOI: 10.18632/oncotarget.22616] [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: 02/08/2017] [Accepted: 09/03/2017] [Indexed: 12/15/2022] Open
Abstract
Chordoma is a rare bone tumor with high recurrence rate, but the mechanism of its development is unclear. Long non-coding RNAs(lncRNAs) are recently revealed to be regulators in a variety of biological processed by targeting on mRNA transcription. Their expression profile and function in chordoma have not been investigated yet. In this study, we firstly performed the comprehensive analysis of the lncRNA and coding genes expression analysis with three chordoma samples and three fetal nucleus pulposus tissues. lncRNA and gene microarrays were used to determine the differentially expressed lncRNAs and protein coding genes. 2786 lncRNAs and 3286 coding genes were significantly up-regulated in chordoma, while 2042 lncRNAs and 1006 coding genes were down-regulated. Pearson correlation analysis was conducted to correlate differentially expressed lncRNAs with protein coding genes, indicating a comprehensive lncRNA-coding gene co-expression network in chordoma. Cis-correlation analysis showed that various transcripts of MEG3 and MEG8 were paired with the most differentially expressed gene DLK1. As located in the same locus, we further analyzed the miRNA clusters in this region, and identified that 61.22% of these miRNAs were significantly down-regulated, implying the silence of the imprinted gene cluster DLK1-MEG3. Overexpression of MEG3 suppressed the proliferation of chordoma cells. Our study pointed out the potential role of lncRNAs in chordoma, presented the lncRNA-coding genes co-expression profile, and revealed that imprinted gene cluster DLK1-MEG3 contributes to the pathogenesis of chordoma development.
Collapse
Affiliation(s)
- Hao Chen
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Kai Zhang
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Jian Lu
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Guizhong Wu
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Huilin Yang
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China.,Institute of Orthopedics, Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Kangwu Chen
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| |
Collapse
|
31
|
Yao H, Duan M, Lin L, Wu C, Fu X, Wang H, Guo L, Chen W, Huang L, Liu D, Rao R, Wang S, Ding Y. TET2 and MEG3 promoter methylation is associated with acute myeloid leukemia in a Hainan population. Oncotarget 2017; 8:18337-18347. [PMID: 28407691 PMCID: PMC5392332 DOI: 10.18632/oncotarget.15440] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 01/11/2017] [Indexed: 11/25/2022] Open
Abstract
The promoter of MEG3, which encodes the long non-coding RNA (lncRNA) MEG3, is often hypermethylated in acute myeloid leukemia (AML). Additionally, the Tet methylcytosine dioxygenase 2 gene (TET2) is frequently inactivated, which can lead to impaired DNA methylation and promote AML development. We examined the association between TET2 and MEG3 promoter hypermethylation in Hainan patients with AML. The expression of MEG3, TET2, miR-22-3p, and miR-22-5p was assessed in bone marrow samples from AML patients and healthy controls using real-time quantitative PCR. Using Sequenom MassARRAY technology, we compared MEG3 promoter methylation in AML patients and healthy controls. MEG3 expression was lower in AML patients than in the controls (P = 0.136). Moreover, there was greater methylation of MEG3 promoter in the AML patients than the controls (P < 0.05). Methylation of the MEG3 promoter correlated negatively with TET2 expression (P < 0.05, r < 0). Likewise there was a negative correlation between TET2 activity and MEG3 promoter methylation (P < 0.05, r < 0). These results suggest that hypermethylation of the MEG3 promoter in AML may result from decreased TET2 activity. These data provide insight into the molecular mechanisms underlying AML development and progression.
Collapse
Affiliation(s)
- Hongxia Yao
- Department of Hematology, Hainan General Hospital, Haikou, Hainan, 570311, R.R. China
| | - Mengling Duan
- Department of Hematology, Hainan General Hospital, Haikou, Hainan, 570311, R.R. China
| | - Lie Lin
- Department of Hematology, Hainan General Hospital, Haikou, Hainan, 570311, R.R. China
| | - Congming Wu
- Department of Hematology, Hainan General Hospital, Haikou, Hainan, 570311, R.R. China
| | - Xiangjun Fu
- Department of Hematology, Hainan General Hospital, Haikou, Hainan, 570311, R.R. China
| | - Hua Wang
- Department of Hematology, Hainan General Hospital, Haikou, Hainan, 570311, R.R. China
| | - Li Guo
- Department of Hematology, Hainan General Hospital, Haikou, Hainan, 570311, R.R. China
| | - Wenting Chen
- Department of Hematology, Hainan General Hospital, Haikou, Hainan, 570311, R.R. China
| | - Li Huang
- Department of Hematology, Hainan General Hospital, Haikou, Hainan, 570311, R.R. China
| | - Dan Liu
- Department of Hematology, Hainan General Hospital, Haikou, Hainan, 570311, R.R. China
| | - Ruo Rao
- Department of Hematology, Hainan General Hospital, Haikou, Hainan, 570311, R.R. China
| | - Shuwen Wang
- Department of Hematology, Hainan General Hospital, Haikou, Hainan, 570311, R.R. China
| | - Yipeng Ding
- Department of Emergency, Hainan General Hospital, Haikou, Hainan, 570311, R.R. China
| |
Collapse
|
32
|
He Y, Luo Y, Liang B, Ye L, Lu G, He W. Potential applications of MEG3 in cancer diagnosis and prognosis. Oncotarget 2017; 8:73282-73295. [PMID: 29069869 PMCID: PMC5641212 DOI: 10.18632/oncotarget.19931] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 07/25/2017] [Indexed: 12/25/2022] Open
Abstract
LncRNAs are emerging as integral functional and regulatory components of normal biological activities and are now considered as critically involved in the development of different diseases including cancer. In this review, we summarized recent findings on maternally expressed gene 3 (MEG3), a noncoding lncRNA, locates in the imprinted DLK1–MEG3 locus on human chromosome 14q32.3 region. MEG3 is expressed in normal tissues but is either lost or decreased in many human tumors and tumor derived cell lines. Studies have demonstrated that MEG3 is associated with cancer initiation, progression, metastasis and chemo-resistance. MEG3 may affect the activities of TP53, MDM2, GDF15, RB1 and some other key cell cycle regulators. In addition, the level of MEG3 showed good correlation with cancer clinicopathological grade. In summary, MEGs is an RNA-based tumor suppressor and is involved in the etiology, progression, and chemosensitivity of cancers. The alteration of MEG3 levels in various cancers suggested the possibility of using MEG3 level for cancer diagnosis and prognosis.
Collapse
Affiliation(s)
- Yuqing He
- Institute of Medical Systems Biology, Guangdong Medical University, Dongguan 523808, China.,Key Laboratory for Medical Molecular Diagnostics of Guangdong Province, Guangdong Medical University, Dongguan 523808, China
| | - Yanhong Luo
- Department of Epidemiology and Medical Statistics, Guangdong Medical University, Dongguan 523808, China
| | - Biyu Liang
- Department of Epidemiology and Medical Statistics, Guangdong Medical University, Dongguan 523808, China
| | - Lei Ye
- Department of Epidemiology and Medical Statistics, Guangdong Medical University, Dongguan 523808, China
| | - Guangxing Lu
- Department of Epidemiology and Medical Statistics, Guangdong Medical University, Dongguan 523808, China
| | - Weiming He
- Department of Epidemiology and Medical Statistics, Guangdong Medical University, Dongguan 523808, China
| |
Collapse
|
33
|
Fan FY, Deng R, Yi H, Sun HP, Zeng Y, He GC, Su Y. The inhibitory effect of MEG3/miR-214/AIFM2 axis on the growth of T-cell lymphoblastic lymphoma. Int J Oncol 2017; 51:316-326. [PMID: 28534937 DOI: 10.3892/ijo.2017.4006] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 04/21/2017] [Indexed: 11/06/2022] Open
Abstract
T-cell lymphoblastic lymphoma (T-LBL) is an aggressive malignancy with poor prognosis and high recurrence rate. Long non-coding RNA (lncRNA)-MEG3 is an important tumor suppressor in various cancers. The present study investigated the potential role of maternally expressed gene 3 (MEG3) in the progression of T-LBL. Suppressed expression of MEG3 was detected in T-LBL tissues compared with adjacent histologically normal tissues. Down-regulated level of MEG3 was also found in three T-LBL cell lines (CCRF-CEM, Jurkat and SUP-T1) compared with human T-cell line H9. The proliferation of T-LBL cells was inhibited and cell apoptosis rate was largely promoted when MEG3 was upregulated by a lentiviral vector. Further research revealed that microRNA (miRNA)-214 is a direct target of MEG3. The expression of miR-214 was increased in T-LBL tissues and cell lines compared with control groups. Besides, decreased level of miR-214 was elevated adding miR-214 mimic in SUP-T1 cells transfected with LncRNA-MEG3. Similarly, upregulated level of miR-214 was downregulated adding miR-214 inhibitor in SUP-T1 cells transfected with MEG3 siRNA. Luciferase activity assay further confirmed the targeting relationship between MEG3 and miR-214. Moreover, AIFM2 protein was predicted as a target of miR-214. The expression of AIFM2 was increased by MEG3 and was downregulated by miR-214 mimic. miRNA-214 reversed the effect of MEG3 on inhibiting cell proliferation and inducing cell apoptosis and cell cycle arrest in SUP-T1 cells. Moreover, relative expression of AIFM2 had a positive correlation with the expression of MEG3 and was negatively affected by miR-214. In vivo, MEG3 effectively suppressed tumor growth and the expression of proliferation markers Ki-67 and proliferating cell nuclear antigen (PCNA). Taken together, our research revealed that MEG3 worked as an anti-oncogene in T-LBL, and the MEG3-miR-214-AIFM2 pathway regulated the growth of T-LBL, providing potential prognosis markers as well as new potential targets for T-LBL treatment.
Collapse
Affiliation(s)
- Fang-Yi Fan
- Department of Hematology and Hematopoietic Stem Cell Transplantation and Cell Immunotherapy Center, Chengdu Military General Hospital of PLA, Chengdu, Sichuan 610083, P.R. China
| | - Rui Deng
- Department of Hematology and Hematopoietic Stem Cell Transplantation and Cell Immunotherapy Center, Chengdu Military General Hospital of PLA, Chengdu, Sichuan 610083, P.R. China
| | - Hai Yi
- Department of Hematology and Hematopoietic Stem Cell Transplantation and Cell Immunotherapy Center, Chengdu Military General Hospital of PLA, Chengdu, Sichuan 610083, P.R. China
| | - Hao-Ping Sun
- Department of Hematology and Hematopoietic Stem Cell Transplantation and Cell Immunotherapy Center, Chengdu Military General Hospital of PLA, Chengdu, Sichuan 610083, P.R. China
| | - Yan Zeng
- Department of Hematology and Hematopoietic Stem Cell Transplantation and Cell Immunotherapy Center, Chengdu Military General Hospital of PLA, Chengdu, Sichuan 610083, P.R. China
| | - Guang-Cui He
- Department of Hematology and Hematopoietic Stem Cell Transplantation and Cell Immunotherapy Center, Chengdu Military General Hospital of PLA, Chengdu, Sichuan 610083, P.R. China
| | - Yi Su
- Department of Hematology and Hematopoietic Stem Cell Transplantation and Cell Immunotherapy Center, Chengdu Military General Hospital of PLA, Chengdu, Sichuan 610083, P.R. China
| |
Collapse
|
34
|
Dong Z, Zhang A, Liu S, Lu F, Guo Y, Zhang G, Xu F, Shi Y, Shen S, Liang J, Guo W. Aberrant Methylation-Mediated Silencing of lncRNA MEG3 Functions as a ceRNA in Esophageal Cancer. Mol Cancer Res 2017; 15:800-810. [PMID: 28539329 DOI: 10.1158/1541-7786.mcr-16-0385] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 01/23/2017] [Accepted: 02/16/2017] [Indexed: 11/16/2022]
Abstract
Maternally expressed gene 3 (MEG3), a long non-coding RNA (lncRNA), has tumor-suppressor properties and its expression is lost in several human tumors. However, its biological role in esophageal squamous cell carcinoma (ESCC) tumorigenesis is poorly defined. The present study determined the role and methylation status of MEG3 in esophageal cancer cells and ESCC clinical specimens, and further observed the competing endogenous RNA (ceRNA) activity of MEG3 in the pathogenesis and development of ESCC. Significant downregulation of MEG3 was detected in esophageal cancer cells and ESCC tissues and the expression level of MEG3 was significantly increased in cancer cells after treated with the DNA methyltransferase inhibitor 5-Aza-dC. Upregulation of MEG3 led to the inhibition of proliferation and invasiveness of the cancer cells. The aberrant promoter hypermethylation of MEG3 indicates silencing of its expression. Furthermore, MEG3 acts as a ceRNA to regulate the expression of E-cadherin and FOXO1 by binding hsa-miR-9. Upregulation of miR-9 was detected in esophageal cancer cell lines and ESCC tissues, and miR-9 promoted esophageal cancer cell proliferation and invasion. Finally, downregulation and hypermethylation of MEG3 was associated with ESCC patients' survival.Implications: MEG3 functions as a tumor-suppressive lncRNA and aberrant promoter hypermethylation is critical for MEG3 gene silencing in ESCC. In addition, MEG3 acts as a ceRNA to regulate expression of E-cadherin and FOXO1 by competitively binding miR-9 and may be used as a potential biomarker in predicting ESCC patients' progression and prognosis. Mol Cancer Res; 15(7); 800-10. ©2017 AACR.
Collapse
Affiliation(s)
- Zhiming Dong
- Laboratory of Pathology, Hebei Cancer Institute, the Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Aili Zhang
- Surgery Department, the Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Shengnan Liu
- Laboratory of Pathology, Hebei Cancer Institute, the Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Fan Lu
- Laboratory of Pathology, Hebei Cancer Institute, the Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Yanli Guo
- Laboratory of Pathology, Hebei Cancer Institute, the Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Guoqiang Zhang
- Laboratory of Pathology, Hebei Cancer Institute, the Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Fenglou Xu
- Laboratory of Pathology, Hebei Cancer Institute, the Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Yabin Shi
- Laboratory of Pathology, Hebei Cancer Institute, the Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Supeng Shen
- Laboratory of Pathology, Hebei Cancer Institute, the Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Jia Liang
- Laboratory of Pathology, Hebei Cancer Institute, the Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Wei Guo
- Laboratory of Pathology, Hebei Cancer Institute, the Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China.
| |
Collapse
|
35
|
Yao H, Sun P, Duan M, Lin L, Pan Y, Wu C, Fu X, Wang H, Guo L, Jin T, Ding Y. microRNA-22 can regulate expression of the long non-coding RNA MEG3 in acute myeloid leukemia. Oncotarget 2017; 8:65211-65217. [PMID: 29029424 PMCID: PMC5630324 DOI: 10.18632/oncotarget.18059] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 04/19/2017] [Indexed: 11/25/2022] Open
Abstract
Aim Acute myeloid leukemia (AML) is the most common blood tumor with poor prognosis. At present, the research found that the pathogenesis of AML is related to many factors, such as recurrent somatic mutations and gene expression and epigenetic changes, however, the molecular mechanism of AML is still unclear. Long non-coding RNA MEG3 is a newly found tumor suppressor and plays a very important role in the regulation of a variety of tumor formation and progression. Studies found that the MEG3 expression was significantly decreased in AML. However, to date, it is not clear the cause of its abnormal expression. Therefore, the molecular mechanism of AML is urgently needed to study the molecular mechanism of AML. Methods The different expression level of MEG3, TET2, miR-22-3p, miR-22-5p in AML was detected by real-time quantification PCR. MEG3, TET2, miR-22-3p, miR-22-3p expression cell pools in K562 cells was used to interfering and TET2, MEG3 TET2, relations with miR-22-3p, miR-22-5p. The effect of AML cell on proliferation was evaluated by TET2 lower expression. Results 1. The lower expression of MEG3 and TET2 in AML cell lines was detected by RT-qPCR. 2. The stable MEG3, TET2 overexpression cell pools in K562 cells was successful established. 3. After transfection, MTT assay revealed that cell growth was significantly increased in AML cell lines transfected with TET2 compared with controls. Conclusions Our findings suggested that MEG3 is significantly down regulated in AML cell lines.
Collapse
Affiliation(s)
- Hongxia Yao
- Department of Hematology, Hainan General Hospital, Haikou, Hainan 570311, P.R. China
| | - Pei Sun
- Department of Hematology, Hunan Yiyang Central Hospital, Yiyang, Hunan 413000, P.R. China
| | - Mengling Duan
- Department of Hematology, Hainan General Hospital, Haikou, Hainan 570311, P.R. China
| | - Lie Lin
- Department of Hematology, Hainan General Hospital, Haikou, Hainan 570311, P.R. China
| | - Yanping Pan
- Department of Hematology, Hainan General Hospital, Haikou, Hainan 570311, P.R. China
| | - Congming Wu
- Department of Hematology, Hainan General Hospital, Haikou, Hainan 570311, P.R. China
| | - Xiangjun Fu
- Department of Hematology, Hainan General Hospital, Haikou, Hainan 570311, P.R. China
| | - Hua Wang
- Department of Hematology, Hainan General Hospital, Haikou, Hainan 570311, P.R. China
| | - Li Guo
- Department of Hematology, Hainan General Hospital, Haikou, Hainan 570311, P.R. China
| | - Tianbo Jin
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, Xi'an, Shaanxi 710069, P.R. China
| | - Yipeng Ding
- Department of Emergency, Hainan General Hospital, Haikou, Hainan 570311, P.R. China
| |
Collapse
|
36
|
Lyu Y, Lou J, Yang Y, Feng J, Hao Y, Huang S, Yin L, Xu J, Huang D, Ma B, Zou D, Wang Y, Zhang Y, Zhang B, Chen P, Yu K, Lam EWF, Wang X, Liu Q, Yan J, Jin B. Dysfunction of the WT1-MEG3 signaling promotes AML leukemogenesis via p53-dependent and -independent pathways. Leukemia 2017; 31:2543-2551. [PMID: 28400619 PMCID: PMC5729340 DOI: 10.1038/leu.2017.116] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 03/16/2017] [Accepted: 04/04/2017] [Indexed: 12/14/2022]
Abstract
Long non-coding RNAs (lncRNAs) play a pivotal role in tumorigenesis, exemplified by the recent finding that lncRNA maternally expressed gene 3 (MEG3) inhibits tumor growth in a p53-dependent manner. Acute myeloid leukemia (AML) is the most common malignant myeloid disorder in adults, and TP53 mutations or loss are frequently detected in patients with therapy-related AML or AML with complex karyotype. Here, we reveal that MEG3 is significantly downregulated in AML and suppresses leukemogenesis not only in a p53-dependent, but also a p53-independent manner. In addition, MEG3 is proven to be transcriptionally activated by Wilms’ tumor 1 (WT1), dysregulation of which by epigenetic silencing or mutations is causally involved in AML. Therefore MEG3 is identified as a novel target of the WT1 molecule. Ten–eleven translocation-2 (TET2) mutations frequently occur in AML and significantly promote leukemogenesis of this disorder. In our study, TET2, acting as a cofactor of WT1, increases MEG3 expression. Taken together, our work demonstrates that TET2 dysregulated WT1-MEG3 axis significantly promotes AML leukemogenesis, paving a new avenue for diagnosis and treatment of AML patients.
Collapse
Affiliation(s)
- Y Lyu
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China.,Department of Hematology, the Second Affiliated Hospital, Institute of Hematopoeitic Stem Cell Transplantation of Dalian Medical University, Liaoning Hematopoeitic Stem Cell Transplantation Medical Center, Dalian Key Laboratory of Hematology, Dalian Medical University, Dalian, China
| | - J Lou
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China.,Department of Neurosurgery, the Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Y Yang
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China.,Department of Hematology, the Second Affiliated Hospital, Institute of Hematopoeitic Stem Cell Transplantation of Dalian Medical University, Liaoning Hematopoeitic Stem Cell Transplantation Medical Center, Dalian Key Laboratory of Hematology, Dalian Medical University, Dalian, China
| | - J Feng
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China
| | - Y Hao
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China
| | - S Huang
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China
| | - L Yin
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China.,Department of Hematology, the Second Affiliated Hospital, Institute of Hematopoeitic Stem Cell Transplantation of Dalian Medical University, Liaoning Hematopoeitic Stem Cell Transplantation Medical Center, Dalian Key Laboratory of Hematology, Dalian Medical University, Dalian, China
| | - J Xu
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China
| | - D Huang
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China.,Department of Hematology, the Second Affiliated Hospital, Institute of Hematopoeitic Stem Cell Transplantation of Dalian Medical University, Liaoning Hematopoeitic Stem Cell Transplantation Medical Center, Dalian Key Laboratory of Hematology, Dalian Medical University, Dalian, China
| | - B Ma
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China.,Department of Neurosurgery, the Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - D Zou
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China
| | - Y Wang
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China.,Department of Hematology, the Second Affiliated Hospital, Institute of Hematopoeitic Stem Cell Transplantation of Dalian Medical University, Liaoning Hematopoeitic Stem Cell Transplantation Medical Center, Dalian Key Laboratory of Hematology, Dalian Medical University, Dalian, China
| | - Y Zhang
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China
| | - B Zhang
- Department of Neurosurgery, the Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - P Chen
- Department of Obstetrics and Gynecology, the Second Xiangya Hospital, Central South University, Changsha, China
| | - K Yu
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, USA
| | - E W-F Lam
- Department of Surgery and Cancer, Imperial College London, London, UK
| | - X Wang
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China
| | - Q Liu
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China
| | - J Yan
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China.,Department of Hematology, the Second Affiliated Hospital, Institute of Hematopoeitic Stem Cell Transplantation of Dalian Medical University, Liaoning Hematopoeitic Stem Cell Transplantation Medical Center, Dalian Key Laboratory of Hematology, Dalian Medical University, Dalian, China
| | - B Jin
- Department of Hematology, the Second Affiliated Hospital, Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, China
| |
Collapse
|
37
|
Disparities in Cervical Cancer Incidence and Mortality: Can Epigenetics Contribute to Eliminating Disparities? Adv Cancer Res 2017; 133:129-156. [PMID: 28052819 DOI: 10.1016/bs.acr.2016.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Screening for uterine cervical intraepithelial neoplasia (CIN) followed by aggressive treatment has reduced invasive cervical cancer (ICC) incidence and mortality. However, ICC cases and carcinoma in situ (CIS) continue to be diagnosed annually in the United States, with minorities bearing the brunt of this burden. Because ICC peak incidence and mortality are 10-15 years earlier than other solid cancers, the number of potential years of life lost to this cancer is substantial. Screening for early signs of CIN is still the mainstay of many cervical cancer control programs. However, the accuracy of existing screening tests remains suboptimal. Changes in epigenetic patterns that occur as a result of human papillomavirus infection contribute to CIN progression to cancer, and can be harnessed to improve existing screening tests. However, this requires a concerted effort to identify the epigenomic landscape that is reliably altered by HPV infection specific to ICC, distinct from transient changes.
Collapse
|
38
|
Fellenberg J, Sähr H, Kunz P, Zhao Z, Liu L, Tichy D, Herr I. Restoration of miR-127-3p and miR-376a-3p counteracts the neoplastic phenotype of giant cell tumor of bone derived stromal cells by targeting COA1, GLE1 and PDIA6. Cancer Lett 2016; 371:134-41. [DOI: 10.1016/j.canlet.2015.10.039] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 10/06/2015] [Accepted: 10/07/2015] [Indexed: 11/15/2022]
|
39
|
Li J, Bian EB, He XJ, Ma CC, Zong G, Wang HL, Zhao B. Epigenetic repression of long non-coding RNA MEG3 mediated by DNMT1 represses the p53 pathway in gliomas. Int J Oncol 2015; 48:723-33. [PMID: 26676363 DOI: 10.3892/ijo.2015.3285] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Accepted: 11/20/2015] [Indexed: 11/06/2022] Open
Abstract
Epigenetic regulation plays a significant role in gliomas. However, how methylation and long non-coding RNA (lncRNA) cooperates to regulate gliomas progression is largely unknown. In this investigation we showed that the downregulation of MEG3 expression due to hypermethylation of MEG3 was observed in gliomas tissues. Treatment of glioma cells with the DNA methylation inhibitor 5-Aza-2'-deoxycytidine (5-AzadC) decreased aberrant hypermethylation of the MEG3 promoter and prevented the loss of MEG3 expression. In addition, DNMT1 was involved in MEG3 promoter methylation, and was inversely correlated with MEG3 expression in gliomas. The inhibition of DNMT1 repressed the proliferation, clone formation, and induced apoptosis in glioma cells. Importantly, the inhibition of DNMT1 contributed to the activation of p53 pathways in gliomas cells. These results suggest that DNMT1-mediated MEG3 hypermethylation caused the loss of MEG3 expression, followed by the inhibition of the p53 pathways in gliomas.
Collapse
Affiliation(s)
- Jia Li
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, P.R. China
| | - Er-Bao Bian
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, P.R. China
| | - Xiao-Jun He
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, P.R. China
| | - Chun-Chun Ma
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, P.R. China
| | - Gang Zong
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, P.R. China
| | - Hong-Liang Wang
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, P.R. China
| | - Bing Zhao
- Department of Neurosurgery, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, P.R. China
| |
Collapse
|
40
|
Rethinking pheochromocytomas and paragangliomas from a genomic perspective. Oncogene 2015; 35:1080-9. [DOI: 10.1038/onc.2015.172] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 03/23/2015] [Accepted: 03/24/2015] [Indexed: 12/12/2022]
|
41
|
Zhou L, Catchpoole D. Spanning the genomics era: the vital role of a single institution biorepository for childhood cancer research over a decade. Transl Pediatr 2015; 4:93-106. [PMID: 26835365 PMCID: PMC4729086 DOI: 10.3978/j.issn.2224-4336.2015.04.05] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The 'genomics era' is considered to have begun with the commencement of the Human Genome Project. As translational genomic studies can only be established when human tissue samples are available for analysis, biospecimens are now proven to be an essential element for their success. During the genomics era the necessity for more extensive biobanking infrastructure has been highlighted. With the increased number of genomic studies into cancer, it is considered that the availability of biospecimens will become the rate limiting step. Despite the efforts in international biobanking, translational genomics is hampered when there low numbers of biospecimens for a particular rare diseases and is most apparent for paediatric cancer. As there is a call for biobanking practice to be responsive to the current experimental needs of the time and for more expansive systems of tissue procurement to be established we have asked the question what role does a single institution biorepository play in the current highly networked world of translational genomics. Here we describe such a case. The Tumour Bank at The Children's Hospital at Westmead (TB-CHW) in the western suburbs of Sydney was formally established in 1998 as a key resource for translational paediatric cancer research. During the genomics era, we show that the TB-CHW has developed into a key biospecimen repository for the cancer research community, during which time it has increasingly found itself having a vital role in the establishment of translational genomics for paediatric cancer. Here we detail metrics that demonstrate how as a single institution biorepository, the TB-CHW has been a strong participant in the advancement of translational genomics throughout the genomics era. This paper describes the significant contribution of a single institutional hospital embedded tumour biobank to the genomic research community. Despite the increased stringencies placed on biobanking practice, the TB-CHW has shown that a single institution biorespository can have a consistent and effective contribution to translational research into rare paediatric malignancy demonstrating its long term benefit throughout the genomics era.
Collapse
Affiliation(s)
- Li Zhou
- The Tumour Bank, Children's Cancer Research Unit, Kids Research Institute, The Children's Hospital at Westmead, Westmead, NSW, Australia
| | - Daniel Catchpoole
- The Tumour Bank, Children's Cancer Research Unit, Kids Research Institute, The Children's Hospital at Westmead, Westmead, NSW, Australia
| |
Collapse
|
42
|
Isin M, Dalay N. LncRNAs and neoplasia. Clin Chim Acta 2015; 444:280-8. [PMID: 25748036 DOI: 10.1016/j.cca.2015.02.046] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 02/24/2015] [Accepted: 02/25/2015] [Indexed: 12/11/2022]
Abstract
Long noncoding RNAs are emerging as new mediators of tumorigenesis by virtue of their various functions and their capacity to induce different mechanisms as a result of their wide spectrum of interactions. They play critical roles in a broad range of cellular processes including regulation of gene expression, imprinting, chromatin modification, transcription and posttranslational processing. Expression and activity of lncRNAs are deregulated in several types of human cancer. Impairment of lncRNA activity may affect key components of the cellular gene regulatory networks and is associated with deregulation of a large number of cellular oncogenic pathways. LncRNAs are also being evaluated as diagnostic and prognostic biomarkers and may provide targets for potential therapeutic applications. An improved understanding of the roles played by lncRNAs in cancer will lead to more effective therapeutic strategies. In this review we summarize the current knowledge on lncRNAs and their function as mediators of tumor development.
Collapse
Affiliation(s)
- Mustafa Isin
- Oncology Institute, Istanbul University, Istanbul, Turkey
| | - Nejat Dalay
- Oncology Institute, Istanbul University, Istanbul, Turkey.
| |
Collapse
|
43
|
Mo CF, Wu FC, Tai KY, Chang WC, Chang KW, Kuo HC, Ho HN, Chen HF, Lin SP. Loss of non-coding RNA expression from the DLK1-DIO3 imprinted locus correlates with reduced neural differentiation potential in human embryonic stem cell lines. Stem Cell Res Ther 2015; 6:1. [PMID: 25559585 PMCID: PMC4417332 DOI: 10.1186/scrt535] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 12/12/2014] [Accepted: 12/15/2014] [Indexed: 12/19/2022] Open
Abstract
INTRODUCTION Pluripotent stem cells are increasingly used to build therapeutic models, including the transplantation of neural progenitors derived from human embryonic stem cells (hESCs). Recently, long non-coding RNAs (lncRNAs), including delta-like homolog 1 gene and the type III iodothyronine deiodinase gene (DLK1-DIO3) imprinted locus-derived maternally expressed gene 3 (MEG3), were found to be expressed during neural development. The deregulation of these lncRNAs is associated with various neurological diseases. The imprinted locus DLK1-DIO3 encodes abundant non-coding RNAs (ncRNAs) that are regulated by differential methylation of the locus. We aim to study the correlation between the DLK1-DIO3-derived ncRNAs and the capacity of hESCs to differentiate into neural lineages. METHODS We classified hESC sublines into MEG3-ON and MEG3-OFF based on the expression levels of MEG3 and its downstream microRNAs as detected by quantitative reverse transcription-polymerase chain reaction (qRT-PCR). A cDNA microarray was used to analyze the gene expression profiles of hESCs. To investigate the capacity of neural differentiation in MEG3-ON and MEG3-OFF hESCs, we performed neural lineage differentiation followed by neural lineage marker expression and neurite formation analyses via qRT-PCR and immunocytochemistry, respectively. MEG3-knockdown via small interfering RNA (siRNA) and small hairpin RNA (shRNA) was used to investigate the potential causative effect of MEG3 in regulating neural lineage-related gene expression. RESULTS DLK1-DIO3-derived ncRNAs were repressed in MEG3-OFF hESCs compared with those in the MEG3-ON hESCs. The transcriptome profile indicated that many genes related to nervous system development and neural-type tumors were differentially expressed in MEG3-OFF hESCs. Three independent MEG3-knockdown assays using different siRNA and shRNA constructs consistently resulted in downregulation of some neural lineage genes. Lower expression levels of stage-specific neural lineage markers and reduced neurite formation were observed in neural lineage-like cells derived from MEG3-OFF-associated hESCs compared with those in the MEG3-ON groups at the same time points after differentiation. CONCLUSIONS Repression of ncRNAs derived from the DLK1-DIO3 imprinted locus is associated with reduced neural lineage differentiation potential in hESCs.
Collapse
Affiliation(s)
- Chu-Fan Mo
- Institute of Biotechnology, National Taiwan University, Taipei, 106, Taiwan.
| | - Fang-Chun Wu
- Department of Obstetrics & Gynecology, College of Medicine and the Hospital, National Taiwan University Hospital, Taipei, 100, Taiwan.
| | - Kang-Yu Tai
- Graduate Institute of Medical Genomics and Proteomics, College of Medicine, National Taiwan University, Taipei, 100, Taiwan. .,Genome and Systems Biology Degree Program, National Taiwan University, Taipei, 106, Taiwan. .,Genome and Systems Biology Degree Program, Academia Sinica, Taipei, 115, Taiwan.
| | - Wei-Chun Chang
- Institute of Biotechnology, National Taiwan University, Taipei, 106, Taiwan.
| | - Kai-Wei Chang
- Genome and Systems Biology Degree Program, National Taiwan University, Taipei, 106, Taiwan. .,Genome and Systems Biology Degree Program, Academia Sinica, Taipei, 115, Taiwan.
| | - Hung-Chih Kuo
- Genomic Research Center, Academia Sinica, Taipei, 115, Taiwan. .,Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, 115, Taiwan.
| | - Hong-Nerng Ho
- Department of Obstetrics & Gynecology, College of Medicine and the Hospital, National Taiwan University Hospital, Taipei, 100, Taiwan.
| | - Hsin-Fu Chen
- Department of Obstetrics & Gynecology, College of Medicine and the Hospital, National Taiwan University Hospital, Taipei, 100, Taiwan. .,Graduate Institute of Medical Genomics and Proteomics, College of Medicine, National Taiwan University, Taipei, 100, Taiwan.
| | - Shau-Ping Lin
- Institute of Biotechnology, National Taiwan University, Taipei, 106, Taiwan. .,Agricultural Biotechnology Research Centre, Academia Sinica, Taipei, 115, Taiwan. .,Research Centre for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei, 106, Taiwan. .,Centre for Systems Biology, National Taiwan University, Taipei, 106, Taiwan.
| |
Collapse
|
44
|
Bian EB, Li J, Xie YS, Zong G, Li J, Zhao B. LncRNAs: New Players in Gliomas, With Special Emphasis on the Interaction of lncRNAs With EZH2. J Cell Physiol 2014; 230:496-503. [PMID: 24403021 DOI: 10.1002/jcp.24549] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 12/20/2013] [Indexed: 12/14/2022]
Affiliation(s)
- Er-Bao Bian
- Department of Neurosurgery; The Second Affiliated Hospital of Anhui Medical University; Hefei China
- Cerebral Vascular Disease Research Center; Anhui Medical University; Hefei China
| | - Jia Li
- Department of Neurosurgery; The Second Affiliated Hospital of Anhui Medical University; Hefei China
- Cerebral Vascular Disease Research Center; Anhui Medical University; Hefei China
| | - Yong-Sheng Xie
- Department of Neurosurgery; The Second Affiliated Hospital of Anhui Medical University; Hefei China
- Cerebral Vascular Disease Research Center; Anhui Medical University; Hefei China
| | - Gang Zong
- Department of Neurosurgery; The Second Affiliated Hospital of Anhui Medical University; Hefei China
- Cerebral Vascular Disease Research Center; Anhui Medical University; Hefei China
| | - Jun Li
- School of Pharmacy; Anhui Medical University; Hefei China
| | - Bing Zhao
- Department of Neurosurgery; The Second Affiliated Hospital of Anhui Medical University; Hefei China
- Cerebral Vascular Disease Research Center; Anhui Medical University; Hefei China
| |
Collapse
|
45
|
Ning S, Zhao Z, Ye J, Wang P, Zhi H, Li R, Wang T, Wang J, Wang L, Li X. SNP@lincTFBS: an integrated database of polymorphisms in human LincRNA transcription factor binding sites. PLoS One 2014; 9:e103851. [PMID: 25075616 PMCID: PMC4116217 DOI: 10.1371/journal.pone.0103851] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 07/02/2014] [Indexed: 12/15/2022] Open
Abstract
Large intergenic non-coding RNAs (lincRNAs) are a new class of functional transcripts, and aberrant expression of lincRNAs was associated with several human diseases. The genetic variants in lincRNA transcription factor binding sites (TFBSs) can change lincRNA expression, thereby affecting the susceptibility to human diseases. To identify and annotate these functional candidates, we have developed a database SNP@lincTFBS, which is devoted to the exploration and annotation of single nucleotide polymorphisms (SNPs) in potential TFBSs of human lincRNAs. We identified 6,665 SNPs in 6,614 conserved TFBSs of 2,423 human lincRNAs. In addition, with ChIPSeq dataset, we identified 139,576 SNPs in 304,517 transcription factor peaks of 4,813 lincRNAs. We also performed comprehensive annotation for these SNPs using 1000 Genomes Project datasets across 11 populations. Moreover, one of the distinctive features of SNP@lincTFBS is the collection of disease-associated SNPs in the lincRNA TFBSs and SNPs in the TFBSs of disease-associated lincRNAs. The web interface enables both flexible data searches and downloads. Quick search can be query of lincRNA name, SNP identifier, or transcription factor name. SNP@lincTFBS provides significant advances in identification of disease-associated lincRNA variants and improved convenience to interpret the discrepant expression of lincRNAs. The SNP@lincTFBS database is available at http://bioinfo.hrbmu.edu.cn/SNP_lincTFBS.
Collapse
Affiliation(s)
- Shangwei Ning
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Zuxianglan Zhao
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Jingrun Ye
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Peng Wang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Hui Zhi
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Ronghong Li
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Tingting Wang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Jianjian Wang
- The Second Affiliated Hospital, Harbin Medical University, Harbin, China
| | - Lihua Wang
- The Second Affiliated Hospital, Harbin Medical University, Harbin, China
- * E-mail: (LW); (XL)
| | - Xia Li
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
- * E-mail: (LW); (XL)
| |
Collapse
|
46
|
Lehner B, Kunz P, Saehr H, Fellenberg J. Epigenetic silencing of genes and microRNAs within the imprinted Dlk1-Dio3 region at human chromosome 14.32 in giant cell tumor of bone. BMC Cancer 2014; 14:495. [PMID: 25005035 PMCID: PMC4101709 DOI: 10.1186/1471-2407-14-495] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Accepted: 07/04/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Growing evidence exists that the neoplastic stromal cell population (GCTSC) within giant cell tumors (GCT) originates from mesenchymal stem cells (MSC). In a previous study we identified a microRNA signature that differentiates between these cell types. Five differentially expressed microRNAs are located within the Dlk1-Dio3 region on chromosome 14. Aberrant regulation within this region is known to influence cell growth, differentiation and the development of cancer. The aim of this study was to elucidate the involvement of deregulations within the Dlk1-Dio3 region in GCT pathogenesis. METHODS Quantitative gene and microRNA expression analyses were performed on GCTSCs and MSCs with or without treatment with epigenetic modifiers. Methylation analysis of differentially methylated regions was performed by bisulfite sequencing. RESULTS In addition to microRNA silencing we detected a significant downregulation of Dlk1, Meg3 and Meg8 in GCTSCs compared to MSCs. DNA methylation analyses of the Meg3-DMR and IG-DMR revealed a frequent hypermethylation within the IG-DMR in GCTs. Epigenetic modification could restore expression of some but not all analyzed genes and microRNAs suggesting further regulatory mechanisms. CONCLUSION Epigenetic silencing of genes and microRNAs within the Dlk1-Dio3 region is a common event in GCTSCs, in part mediated by hypermethylation within the IG-DMR. The identified genes, micro RNAs and microRNA target genes might be valuable targets for the development of improved strategies for GCT diagnosis and therapy.
Collapse
Affiliation(s)
| | | | | | - Joerg Fellenberg
- Research Centre for Experimental Orthopedics, Department of Orthopedics, Trauma Surgery and Paraplegia, Orthopedic University Hospital Heidelberg, Schlierbacher Landstr 200a, Heidelberg 69118, Germany.
| |
Collapse
|
47
|
Shi D, Zheng H, Zhuo C, Peng J, Li D, Xu Y, Li X, Cai G, Cai S. Low expression of novel lncRNA RP11-462C24.1 suggests a biomarker of poor prognosis in colorectal cancer. Med Oncol 2014; 31:31. [PMID: 24908062 PMCID: PMC4079943 DOI: 10.1007/s12032-014-0031-7] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 05/09/2014] [Indexed: 12/22/2022]
Abstract
Long noncoding RNAs (lncRNAs) have recently emerged as a major class of regulatory molecules, which were involved in a broad range of biological processes and complex diseases. Research on lncRNAs may shed light on tumorigenesis and progression of colorectal cancer (CRC). The purpose of the present study was to identify lncRNAs correlated with CRC and then investigate their potential functions. We selected 92 patients for this prospective study and then collected the tumor samples and clinical records. First, the global lncRNA expression profiles in tumor and adjacent normal tissues of patients with non-metastatic CRC and patients with metastatic CRC were measured by microarray assay. Then, a noteworthy lncRNAs RP11-462C24.1 whose function was previously unknown was explored in detail on the aspect of the association of its expression level and clinicopathological features of CRC and patients' survival. We found that RP11-462C24.1 expression level was lower in cancer tissues compared with adjacent normal samples (P < 0.001). Furthermore, its expression level was lower in CRC patients with metastasis than those without metastasis (P = 0.049). That is, RP11-462C24.1 expression level decreased as the malignant degree of CRC increased. In addition, low expression of RP11-462C24.1 significantly correlated with more distant metastasis (P = 0.011). The areas under ROC curves were 0.78 and 0.65 for RP11-462C24.1, distinguishing CRC from normal tissue and distinguishing CRC without metastasis from CRC with metastasis, respectively. Multivariate analysis identified that RP11-462C24.1 was an independent predictor for patients prognosis (P = 0.005). Furthermore, Kaplan-Meier analysis showed that patients with low expression of RP11-462C24.1 had a poor disease-free survival (P < 0.001). This is the first study that correlates RP11-462C24.1 expression profile with malignancy grade in human CRC. Our results showed that RP11-462C24.1 could be a potential novel prognostic marker for CRC, and thus, provided a new strategy for CRC diagnosis. Meanwhile, our findings indicated the potential roles of RP11-462C24.1 in tumorigenesis and progression of CRC, which gave a clue for future studies.
Collapse
Affiliation(s)
- Debing Shi
- Department of Colorectal Surgery, Fudan University Shanghai Cancer Center, Shanghai, 200032, China,
| | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Sheng X, Li J, Yang L, Chen Z, Zhao Q, Tan L, Zhou Y, Li J. Promoter hypermethylation influences the suppressive role of maternally expressed 3, a long non-coding RNA, in the development of epithelial ovarian cancer. Oncol Rep 2014; 32:277-85. [PMID: 24859196 DOI: 10.3892/or.2014.3208] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Accepted: 04/03/2014] [Indexed: 12/13/2022] Open
Abstract
Maternally expressed 3 (MEG3) is a long non-coding RNA that can activate p53 and inhibit tumorigenesis and progression of various types of cancers. However, the role of MEG3 in epithelial ovarian cancer (EOC) is still unknown. The aim of the present study was to confirm whether MEG3 is downregulated in human EOC, determine its possible mechanism of action and elucidate the role of MEG3 in EOC. Differences in the expression of MEG3 and in the methylation status of the MEG3 promoter between EOC and normal ovary were analyzed using RT-PCR and methylation-specific PCR (MSP), respectively. MTT and EdU assays and flow cytometric analysis were used to assess the growth of ovarian cancer cells after overexpression of MEG3. The target genes regulated by MEG3 were detected with the Dual Luciferase Reporter system. The expression levels of target genes were confirmed using RT-PCR and western blotting. In contrast to normal ovarian tissues, the expression of MEG3 was absent or decreased in most EOC tissues as well as in human EOC cell lines, and the promoter of the MEG3 gene was highly methylated in both cancer tissues and cell lines. Treatment with 5-aza-2-deoxycytidine reversed the promoter hypermethylation and increased MEG3 expression. In addition, ectopic expression of MEG3 suppressed the proliferation and growth of OVCAR3 cells and promoted apoptosis. Finally, MEG3 activated p53 in OVCAR3 cells. In conclusion, our data suggest that MEG3 is epigenetically silenced in EOC due to promoter hypermethylation, which may contribute to the development of EOC.
Collapse
Affiliation(s)
- Xiujie Sheng
- Department of Obstetrics and Gynecology, Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510150, P.R. China
| | - Jianqi Li
- Department of Obstetrics and Gynecology, Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510150, P.R. China
| | - Lei Yang
- The Institute for Chemical Carcinogenesis, Guangzhou Medical University, Guangzhou 510182, P.R. China
| | - Zhiyi Chen
- Guangzhou Institute of Obstetrics and Gynecology, Guangzhou 510182, P.R. China
| | - Qin Zhao
- Department of Obstetrics and Gynecology, Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510150, P.R. China
| | - Linyu Tan
- Department of Obstetrics and Gynecology, Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510150, P.R. China
| | - Yanqing Zhou
- Department of Obstetrics and Gynecology, Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510150, P.R. China
| | - Juan Li
- Department of Obstetrics and Gynecology, Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510150, P.R. China
| |
Collapse
|
49
|
Qi L, Liu J, Zhu H, Li Z, Lu K, Li T, Shi D. Inhibition of glioma proliferation and migration by magnetic nanoparticle mediated JAM-2 silencing. J Mater Chem B 2014; 2:7168-7175. [PMID: 32261795 DOI: 10.1039/c4tb00954a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Brain invasion is a biological hallmark of glioma that leads to its aggressiveness and prognosis.
Collapse
Affiliation(s)
- Lifeng Qi
- Shanghai East Hospital
- The Institute for Biomedical Engineering & Nano Science
- Tongji University School of Medicine
- Shanghai 200120, China
| | - Jing Liu
- Shanghai East Hospital
- The Institute for Biomedical Engineering & Nano Science
- Tongji University School of Medicine
- Shanghai 200120, China
| | - Haiyan Zhu
- Shanghai East Hospital
- The Institute for Biomedical Engineering & Nano Science
- Tongji University School of Medicine
- Shanghai 200120, China
| | - Zhuoquan Li
- Shanghai East Hospital
- The Institute for Biomedical Engineering & Nano Science
- Tongji University School of Medicine
- Shanghai 200120, China
| | - Kun Lu
- Shanghai East Hospital
- The Institute for Biomedical Engineering & Nano Science
- Tongji University School of Medicine
- Shanghai 200120, China
| | - Tian Li
- Shanghai East Hospital
- The Institute for Biomedical Engineering & Nano Science
- Tongji University School of Medicine
- Shanghai 200120, China
| | - Donglu Shi
- Shanghai East Hospital
- The Institute for Biomedical Engineering & Nano Science
- Tongji University School of Medicine
- Shanghai 200120, China
- The Materials Science and Engineering Program
| |
Collapse
|
50
|
Lu KH, Li W, Liu XH, Sun M, Zhang ML, Wu WQ, Xie WP, Hou YY. Long non-coding RNA MEG3 inhibits NSCLC cells proliferation and induces apoptosis by affecting p53 expression. BMC Cancer 2013; 13:461. [PMID: 24098911 PMCID: PMC3851462 DOI: 10.1186/1471-2407-13-461] [Citation(s) in RCA: 338] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 09/17/2013] [Indexed: 12/31/2022] Open
Abstract
Background Long non-coding RNAs play an important role in tumorigenesis, hence, identification of cancer-associated lncRNAs and investigation of their biological functions and molecular mechanisms are important for understanding the development and progression of cancer. Recently, the downregulation of lncRNA MEG3 has been observed in various human cancers. However, its role in non-small cell lung cancer (NSCLC) is unknown. The aim of this study was to examine the expression pattern of MEG3 in NSCLC and to evaluate its biological role and clinical significance in tumor progression. Methods Expression of MEG3 was analyzed in 44 NSCLC tissues and 7 NSCLC cell lines by qRT-PCR. Over-expression approaches were used to investigate the biological functions of MEG3 in NSCLC cells. Bisulfite sequencing was used to investigate DNA methylation on MEG3 expression. The effect of MEG3 on proliferation was evaluated by MTT and colony formation assays, and cell apoptosis was evaluated by Hoechst staining and Flow-cytometric analysis. NSCLC cells transfected with pCDNA-MEG3 were injection into nude mice to study the effect of MEG3 on tumorigenesis in vivo . Protein levels of MEG3 targets were determined by western blot analysis. Differences between groups were tested for significance using Student’s t-test (two-tailed). Results MEG3 expression was decreased in non-small cell lung cancer (NSCLC) tumor tissues compared with normal tissues, and associated with advanced pathologic stage, and tumor size. Moreover, patients with lower levels of MEG3 expression had a relatively poor prognosis. Overexpression of MEG3 decreased NSCLC cells proliferation and induced apoptosis in vitro and impeded tumorigenesis in vivo. MDM2 and p53 protein levels were affected by MEG3 over-expression in vitro. Conclusions Our findings indicate that MEG3 is significantly down-regulated in NSCLC tissues that could be affected by DNA methylation, and regulates NSCLC cell proliferation and apoptosis, partially via the activition of p53. Thus, MEG3 may represent a new marker of poor prognosis and is a potential therapeutic target for NSCLC intervention.
Collapse
Affiliation(s)
- Kai-hua Lu
- Department of respiratory, First Affiliated Hospital, Nanjing Medical University, Nanjing, People's Republic of China.
| | | | | | | | | | | | | | | |
Collapse
|