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Retraction: A negative feedback loop between long noncoding RNA NBAT1 and Sox9 inhibits the malignant progression of gastric cancer cells. Biosci Rep 2024; 44. [PMID: 38426236 DOI: 10.1042/BSR-2018-0882_RET] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024] Open
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Juvvuna PK, Mondal T, Di Marco M, Kosalai ST, Kanduri M, Kanduri C. NBAT1/CASC15-003/USP36 control MYCN expression and its downstream pathway genes in neuroblastoma. Neurooncol Adv 2021; 3:vdab056. [PMID: 34056606 PMCID: PMC8156975 DOI: 10.1093/noajnl/vdab056] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Background MYCN has been an attractive therapeutic target in neuroblastoma considering the widespread amplification of the MYCN locus in neuroblastoma, and its established role in neuroblastoma development and progression. Thus, understanding neuroblastoma-specific control of MYCN expression at the transcriptional and post-transcriptional level would lead to identification of novel MYCN-dependent oncogenic pathways and potential therapeutic strategies. Methods By performing loss- and gain-of-function experiments of the neuroblastoma hotspot locus 6p22.3 derived lncRNAs CASC15-003 and NBAT1, together with coimmunoprecipitation and immunoblotting of MYCN, we have shown that both lncRNAs post-translationally control the expression of MYCN through regulating a deubiquitinase enzyme USP36. USP36 oncogenic properties were investigated using cancer cell lines and in vivo models. RNA-seq analysis of loss-of-function experiments of CASC15-003/NBAT1/MYCN/USP36 and JQ1-treated neuroblastoma cells uncovered MYCN-dependent oncogenic pathways. Results We show that NBAT1/CASC15-003 control the stability of MYCN protein through their common interacting protein partner USP36. USP36 harbors oncogenic properties and its higher expression in neuroblastoma patients correlates with poor prognosis, and its downregulation significantly reduces tumor growth in neuroblastoma cell lines and xenograft models. Unbiased integration of RNA-seq data from CASC15-003, NBAT1, USP36, and MYCN knockdowns and neuroblastoma cells treated with MYCN inhibitor JQ1, identified genes that are jointly regulated by the NBAT1/CASC15-003/USP36/MYCN pathway. Functional experiments on one of the target genes, COL18A1, revealed its role in the NBAT1/CASC15-003-dependent cell adhesion feature in neuroblastoma cells. Conclusion Our data show post-translational regulation of MYCN by NBAT1/CASC15-003/USP36, which represents a new regulatory layer in the complex multilayered gene regulatory network that controls MYCN expression.
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Affiliation(s)
- Prasanna Kumar Juvvuna
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Tanmoy Mondal
- Department of Clinical Chemistry and Transfusion Medicine, Sahlgrenska University Hospital, Laboratory Medicine, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Mirco Di Marco
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Subazini Thankaswamy Kosalai
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Meena Kanduri
- Department of Clinical Chemistry and Transfusion Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Chandrasekhar Kanduri
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
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Wei L, Ling M, Yang S, Xie Y, Liu C, Yi W. Long noncoding RNA NBAT1 suppresses hepatocellular carcinoma progression via competitively associating with IGF2BP1 and decreasing c-Myc expression. Hum Cell 2021; 34:539-549. [PMID: 33387362 DOI: 10.1007/s13577-020-00464-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 11/20/2020] [Indexed: 12/16/2022]
Abstract
Hepatocellular Carcinoma (HCC) is the second leading cause of cancer-related deaths. Neuroblastoma associated transcript 1 (NBAT1) is a newly identified long noncoding RNA (lncRNA), which has been reported to play an important role in human cancers. However, the functional role and underlying mechanism of NBAT1 in HCC remains unclear. Here, we found that the expression of NBAT1 was decreased in HCC tissues and cells; as well, the decreased expression of NBAT1 was also associated with tumor size and clinical TNM stages. NBAT1 overexpression, both in vitro and in vivo studies, inhibited tumorigenesis through apoptosis augmentation and cell cycle blockade. Mechanistically, NBAT1 bound to IGF2BP1 and inhibited the interaction between IGF2BP1 and c-Myc mRNA, thus suppressing the stability of c-Myc mRNA. Collectively, NBAT1 is associated with HCC tumorigenesis and could be a therapeutic target for HCC treatment.
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Affiliation(s)
- Ling Wei
- Department of Gastroenterology, The Second Affiliated Hospital, Hainan Medical University, Haikou, 570311, Hainan, China
| | - Mengzhi Ling
- Department of Gastroenterology, Cadre sanatorium of Hainan & Geriatric hospital of Hainan (CSH), Haikou, 571100, Hainan, China
| | - Song Yang
- Emergency Department, Hainan Cancer Hospital, Haikou, 570312, China
| | - Yunqian Xie
- Department of Gastroenterology, The Second Affiliated Hospital, Hainan Medical University, Haikou, 570311, Hainan, China
| | - Changjiang Liu
- Department of Gastroenterology, The Second Affiliated Hospital, Hainan Medical University, Haikou, 570311, Hainan, China
| | - Wenyi Yi
- General Department, The Second Affiliated Hospital, Hainan Medical University, No.48, Baishuitang Road, Haikou, 570311, Hainan, China.
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Xue S, Wang S, Li J, Guan H, Jiang S, Guo Y, Li Q. LncRNA NBAT1 suppresses cell proliferation and migration via miR-346/GSK-3β axis in renal carcinoma. IUBMB Life 2019; 71:1720-1728. [PMID: 31298469 DOI: 10.1002/iub.2111] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 06/12/2019] [Indexed: 01/01/2023]
Abstract
Long non-coding RNA (LncRNA) neuroblastoma associated transcript 1 (NBAT1) was demonstrated to be significantly downregulated in renal carcinoma (RCC) cells. However, the function and mechanism of NBAT1 in RCC is poorly understood. The expression of NBAT1 and glycogen synthase kinase-3β (GSK-3β)-mediated Wnt/β-catenin-related proteins were measured by quantitative real-time PCR (qRT-PCR) and western blotting in RCC cell lines. Cell viability, migration, and invasion were estimated by CCK-8 and Transwell assay. The association of miR-346 with GSK-3β expression was verified using luciferase assay. NBAT1 was significantly downregulated in RCC cells, and inhibited RCC cell proliferation, migration, and invasion. Furthermore, NBAT1 negatively regulated miR-346 expression. In addition, miR-346 overexpression and the knockdown of GSK-3β, a direct target of miR-346 could overturn the inhibitory effect of NBAT1 on Wnt/β-catenin signaling and cell proliferation, migration, and invasion. NBAT1 functioned as an endogenous sponge by competing for miR-346 binding to GSK-3β and therefore alleviated RCC cells.
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Affiliation(s)
- Sheng Xue
- Department of Urology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China
| | - Sheng Wang
- Department of Urology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China
| | - Jian Li
- Department of Urology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China
| | - Han Guan
- Department of Urology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China
| | - Shengqun Jiang
- Department of Ophthalmology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China
| | - Yuanyuan Guo
- Department of Urology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China
| | - Qingwen Li
- Department of Urology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China
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Yan J, Huang W, Huang X, Xiang W, Ye C, Liu J. A negative feedback loop between long noncoding RNA NBAT1 and Sox9 inhibits the malignant progression of gastric cancer cells. Biosci Rep 2018; 38:BSR20180882. [PMID: 30287498 PMCID: PMC6240717 DOI: 10.1042/bsr20180882] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 09/17/2018] [Accepted: 09/26/2018] [Indexed: 01/15/2023] Open
Abstract
Long noncoding RNAs (lncRNAs) play critical roles in carcinogenesis and progression, and act as important gene expression modulators. Recent evidence indicates that lncRNA neuroblastoma associated transcript 1 (NBAT1) functions as a tumor suppressor in some types of human cancers. However, its functional role in the development of gastric cancer (GC) remains unknown. The aim of this research was to investigate the clinical significance and biological functions of NBAT1 in GC. NBAT1 was found to be significantly down-regulated in GC tissue. Decreased NBAT1 expression was correlated with poor differentiation, higher tumor stage and lymph node metastasis, and poor prognosis. Functional assays showed that NBAT1 inhibited GC proliferation, migration, and invasion. NBAT1 also suppressed proliferation, migration, and capillary tube formation of human umbilical vein endothelial cells (HUVECs). Mechanistically, NBAT1 interacted with Sox9, and reduced its protein stability by promoting it from polyubiquitination and proteasome-dependent degradation. Moreover, we revealed that Sox9 could occupy the NBAT1 promoter to inactivate its transcription. The negative feedback loop of NBAT1 and Sox9 continuously enhanced the suppressive effects. In conclusion, these findings suggest that feedback regulation of NBAT1 and Sox9 served as a critical effector in GC progression.
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Affiliation(s)
- Jijun Yan
- Department of General Surgery, Hanchuan People's Hospital, Hubei Province, China
| | - Wenwei Huang
- Department of General Surgery, Hanchuan People's Hospital, Hubei Province, China
| | - Xiufang Huang
- Department of General Surgery, Hanchuan People's Hospital, Hubei Province, China
| | - Wencai Xiang
- Department of General Surgery, Hanchuan People's Hospital, Hubei Province, China
| | - Chao Ye
- Department of General Surgery, Hanchuan People's Hospital, Hubei Province, China
| | - Juntao Liu
- Department of General Surgery, Hanchuan People's Hospital, Hubei Province, China
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Zheng T, Li D, He Z, Feng S, Zhao S. Long noncoding RNA NBAT1 inhibits autophagy via suppression of ATG7 in non-small cell lung cancer. Am J Cancer Res 2018; 8:1801-1811. [PMID: 30323972 PMCID: PMC6176184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 06/03/2018] [Indexed: 06/08/2023] Open
Abstract
Autophagy is critical for the survival of cancer cells. It has been reported that long noncoding RNA (lncRNA) neuroblastoma associated transcript 1 (NBAT1) exerts as a tumor suppressor in some cancers. However, the role of NBAT1 in autophagy of non-small cell lung cancer (NSCLC) remains unknown. Here, it was reported that NBAT1 overexpression inhibited autophagy, while knockdown of NBAT1 induced autophagy in NSCLC cells. Further mechanistic study showed that NBAT1 interacted with PSMD10 and promoted its degradation, and then inhibited the occupancy of PSMD10 and HSF1 in the ATG7 promoter to suppress ATG7 transcription. A significantly negative correlation between NBAT1 and ATG7 levels was observed in NSCLC tissue. The prognoses of NSCLC patients with low expression of NBAT1 were much worse than those with high-level NBAT1. Moreover, NBAT1 negatively regulated cell viability, clonogenicity, and chemoresistance through inhibition of autophagy. Our findings suggest that the NBAT1-PSMD10-ATG7 axis may be an attractive strategy in NSCLC treatment by suppressing autophagy and chemoresistance.
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Affiliation(s)
- Tianliang Zheng
- Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450000, Henan Province, China
| | - Deping Li
- Department of Acupuncture and Moxibustion, Zhengzhou Hospital of Traditional Chinese MedicineZhengzhou 450000, Henan Province, China
| | - Zhanfeng He
- Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450000, Henan Province, China
| | - Shuaibing Feng
- Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450000, Henan Province, China
| | - Song Zhao
- Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450000, Henan Province, China
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Mondal T, Juvvuna PK, Kirkeby A, Mitra S, Kosalai ST, Traxler L, Hertwig F, Wernig-Zorc S, Miranda C, Deland L, Volland R, Bartenhagen C, Bartsch D, Bandaru S, Engesser A, Subhash S, Martinsson T, Carén H, Akyürek LM, Kurian L, Kanduri M, Huarte M, Kogner P, Fischer M, Kanduri C. Sense-Antisense lncRNA Pair Encoded by Locus 6p22.3 Determines Neuroblastoma Susceptibility via the USP36-CHD7-SOX9 Regulatory Axis. Cancer Cell 2018. [PMID: 29533783 DOI: 10.1016/j.ccell.2018.01.020] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Trait-associated loci often map to genomic regions encoding long noncoding RNAs (lncRNAs), but the role of these lncRNAs in disease etiology is largely unexplored. We show that a pair of sense/antisense lncRNA (6p22lncRNAs) encoded by CASC15 and NBAT1 located at the neuroblastoma (NB) risk-associated 6p22.3 locus are tumor suppressors and show reduced expression in high-risk NBs. Loss of functional synergy between 6p22lncRNAs results in an undifferentiated state that is maintained by a gene-regulatory network, including SOX9 located on 17q, a region frequently gained in NB. 6p22lncRNAs regulate SOX9 expression by controlling CHD7 stability via modulating the cellular localization of USP36, encoded by another 17q gene. This regulatory nexus between 6p22.3 and 17q regions may lead to potential NB treatment strategies.
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Affiliation(s)
- Tanmoy Mondal
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Prasanna Kumar Juvvuna
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Agnete Kirkeby
- Wallenberg Neuroscience Center, Lund University, 22184 Lund, Sweden; Danish Stem Cell Center (DanStem), University of Copenhagen, 2200 Copenhagen, Denmark
| | - Sanhita Mitra
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Subazini Thankaswamy Kosalai
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Larissa Traxler
- Wallenberg Neuroscience Center, Lund University, 22184 Lund, Sweden
| | - Falk Hertwig
- Department of Experimental Pediatric Oncology, University Children's Hospital, and Center for Molecular Medicine (CMMC), Medical Faculty, University of Cologne, 50937 Cologne, Germany; Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, 10117 Berlin, Germany
| | - Sara Wernig-Zorc
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Caroline Miranda
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Lily Deland
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Ruth Volland
- Department of Experimental Pediatric Oncology, University Children's Hospital, and Center for Molecular Medicine (CMMC), Medical Faculty, University of Cologne, 50937 Cologne, Germany
| | - Christoph Bartenhagen
- Department of Experimental Pediatric Oncology, University Children's Hospital, and Center for Molecular Medicine (CMMC), Medical Faculty, University of Cologne, 50937 Cologne, Germany
| | - Deniz Bartsch
- Center for Molecular Medicine Cologne, Institute for Neurophysiology, The Cologne Cluster of Excellence in Cellular Stress Responses in Aging-associated Diseases, University of Cologne, Cologne, Germany
| | - Sashidhar Bandaru
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Anne Engesser
- Department of Experimental Pediatric Oncology, University Children's Hospital, and Center for Molecular Medicine (CMMC), Medical Faculty, University of Cologne, 50937 Cologne, Germany
| | - Santhilal Subhash
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Tommy Martinsson
- Department of Pathology and Genetics, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Helena Carén
- Sahlgrenska Cancer Center, Department of Pathology and Genetics, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Levent M Akyürek
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden; Department of Pathology and Genetics, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Leo Kurian
- Center for Molecular Medicine Cologne, Institute for Neurophysiology, The Cologne Cluster of Excellence in Cellular Stress Responses in Aging-associated Diseases, University of Cologne, Cologne, Germany
| | - Meena Kanduri
- Department of Clinical Chemistry and Transfusion Medicine, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Maite Huarte
- Center for Applied Medical Research (CIMA), University of Navarra, Pio XII, 55, 31008 Pamplona, Spain
| | - Per Kogner
- Childhood Cancer Research Unit, Astrid Lindgren Children's Hospital, Karolinska University Hospital, 17176 Stockholm, Sweden
| | - Matthias Fischer
- Department of Experimental Pediatric Oncology, University Children's Hospital, and Center for Molecular Medicine (CMMC), Medical Faculty, University of Cologne, 50937 Cologne, Germany
| | - Chandrasekhar Kanduri
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden.
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Yang C, Wang G, Yang J, Wang L. Long noncoding RNA NBAT1 negatively modulates growth and metastasis of osteosarcoma cells through suppression of miR-21. Am J Cancer Res 2017; 7:2009-2019. [PMID: 29119050 PMCID: PMC5665848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 08/10/2017] [Indexed: 06/07/2023] Open
Abstract
Osteosarcoma (OS) is the most common primary bone malignancies. Long noncoding RNAs (lncRNAs) are key regulatory RNAs which takes part in several biological processes. LncRNA neuroblastoma associated transcript 1 (NBAT1) is a newly identified functional lncRNA. NBAT1 functions as a tumor suppressor in some cancers. However, the expression pattern, the biological function and the mechanisms of NBAT1 in OS progress have not been elucidated. In this study, for the first time, we found that NBAT1 expression is downregulated in OS tissues and cell lines and is associated with clinical stage, distant metastasis and poor prognosis. Loss- and gain-of-function assays showed that NBAT1 played a negative regulatory role in OS growth and metastasis in vitro and in vivo. Further investigation demonstrated that NBAT1 physically interacted with miR-21 and then suppressed its expression. NBAT1 also regulated downstream genes targeted by miR-21, including PTEN, PDCD4, TPM1 and RECK. These findings may extend the function of NBAT1 in tumor progression and provide a novel target for OS treatment.
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Affiliation(s)
- Cheng Yang
- No.4 Department of Orthopedics, Cangzhou Central HospitalCangzhou 061001, Hebei Province, China
| | - Guijiang Wang
- No.4 Department of Orthopedics, Cangzhou Central HospitalCangzhou 061001, Hebei Province, China
| | - Jian Yang
- No.4 Department of Orthopedics, Cangzhou Central HospitalCangzhou 061001, Hebei Province, China
| | - Liguo Wang
- No.4 Department of Orthopedics, Cangzhou Central HospitalCangzhou 061001, Hebei Province, China
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Hu P, Chu J, Wu Y, Sun L, Lv X, Zhu Y, Li J, Guo Q, Gong C, Liu B, Su S. NBAT1 suppresses breast cancer metastasis by regulating DKK1 via PRC2. Oncotarget 2015; 6:32410-25. [PMID: 26378045 DOI: 10.18632/oncotarget.5609] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 08/26/2015] [Indexed: 12/22/2022] Open
Abstract
Long noncoding RNA NBAT1 (neuroblastoma associated transcript 1) regulates cell proliferation and invasion by interacting with PRC2 (polycomb repressive complex 2) member EZH2 (enhancer of zeste 2). Decreased expression of NBAT1 is associated with poor clinical outcome in neuroblastomas. However, the roles of NBAT1 in other cancers remain unknown. Here, we report that NBAT1 is down-regulated in various types of cancer. Particularly, reduced NBAT1 in breast cancer is associated with tumor metastasis and poor patient prognosis. In vitro, ectopic NBAT1 inhibits migration and invasion of breast cancer cells. Mechanistic study shows that NBAT1 is associated with PRC2 member EZH2 and regulates global gene expression profile. Among them, DKK1 (dickkopf WNT signaling pathway inhibitor 1) is found to be regulated by NBAT1 in a PRC2 dependent manner, and is responsible for NBAT1's effects in inhibiting migration and invasion of breast cancer cells. Taken together, our study demonstrates that long noncoding RNA NBAT1 is a potential breast cancer prognostic marker, as well as a potential therapeutic target to inhibit breast cancer metastasis.
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Abstract
Neuroblastoma is a disease that affects infants and despite intense multimodal therapy, high-risk patients have low survival rates (<50%). In recent years long noncoding RNAs (lncRNAs) have become the cutting edge of cancer research with inroads made in understanding their roles in multiple cancer types, including prostate and breast cancers. The roles of lncRNAs in neuroblastoma have just begun to be elucidated. This review summarises where we are with regards to lncRNAs in neuroblastoma. The known mechanistic roles of lncRNAs during neuroblastoma pathogenesis are discussed, as well as the relationship between lncRNA expression and the differentiation capacity of neuroblastoma cells. We speculate about the use of some of these lncRNAs, such as those mapping to the 6p22 hotspot, as biomarkers for neuroblastoma prognosis and treatment. This novel way of thinking about both neuroblastoma and lncRNAs brings a new perspective to the prognosis and treatment of high-risk patients.
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