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Hall PE, Spicer J, Popat S. Rationale for targeting the ErbB family of receptors in patients with advanced squamous cell carcinoma of the lung. Future Oncol 2015; 11:2175-91. [PMID: 26039665 DOI: 10.2217/fon.15.110] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Squamous cell carcinoma (SCC) of the lung represents around 30% of all non-small-cell lung cancers. Treatment options for nonsquamous histology have increased in recent years following the development of pemetrexed chemotherapy and the identification of activating EGFR mutations and ALK rearrangements as targets for effective noncytotoxic agents. By contrast, until recently the development of new therapies for SCC has lagged behind. However, the identification of important genetic events driving SCC, including a greater understanding of the role of the ErbB receptor family in SCC pathogenesis, as well as recent immunotherapy advances, have led to new treatment options for SCC.
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Affiliation(s)
- Peter E Hall
- Department of Medical Oncology, Guy's & St Thomas' NHS Trust, London, UK
| | - James Spicer
- Department of Medical Oncology, Guy's & St Thomas' NHS Trust, London, UK.,Division of Cancer Studies, King's College London, London, UK
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202
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Huang H, Jiang Y, Wang Y, Chen T, Yang L, He H, Lin Z, Liu T, Yang T, Kamp DW, Wu B, Liu G. miR-5100 promotes tumor growth in lung cancer by targeting Rab6. Cancer Lett 2015; 362:15-24. [PMID: 25754817 DOI: 10.1016/j.canlet.2015.03.004] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 02/15/2015] [Accepted: 03/03/2015] [Indexed: 12/21/2022]
Abstract
Our previous study demonstrated that microRNA 5100 (miR-5100) is overexpressed in lung cancer tissues; however, the function of miR-5100 remained elusive. In this study, we demonstrate that miR-5100 is highly expressed in a wide variety of lung cancer tissues and lung cancer cell lines. Exogenous expression of miR-5100 in A549 and H1299 lung cancer cells enhanced proliferation and colony formation, and conversely, suppression of miR-5100 exhibited inhibitory effects. Furthermore, we demonstrate that miR-5100 promotes tumor growth in nude mice. These effects may result from the ability of miR-5100 to promote G1/S transition and downregulate cyclin D1 and cyclin-dependent kinases 2 (CDK2) expressions in lung cancer stable cells. Using a bioinformatics target prediction tool, we identified Rab6 as a potential target of miR-5100. Consistently, overexpression of miR-5100 specifically reduced the expression of a luciferase reporter containing the predicted binding site from the 3'untranslated region (3'UTR) of Rab6 and decreased the accumulation of endogenous Rab6 in A549 and H1299 cells. Moreover, exogenous expression of Rab6 compromised the effects of miR-5100 on cell proliferation and colony formation. Our data suggest that miR-5100 promotes tumor growth by facilitating the G1/S transition and targeting Rab6.
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Affiliation(s)
- Haili Huang
- Clinical Research Center, Guangdong Medical College, Zhanjiang 524001, China
| | - Yun Jiang
- Clinical Research Center, Guangdong Medical College, Zhanjiang 524001, China
| | - Yahong Wang
- Clinical Research Center, Guangdong Medical College, Zhanjiang 524001, China
| | - Ting Chen
- Clinical Research Center, Guangdong Medical College, Zhanjiang 524001, China
| | - Lawei Yang
- Clinical Research Center, Guangdong Medical College, Zhanjiang 524001, China
| | - Huijuan He
- Clinical Research Center, Guangdong Medical College, Zhanjiang 524001, China
| | - Ziying Lin
- Clinical Research Center, Guangdong Medical College, Zhanjiang 524001, China
| | - Tie Liu
- Immunology and Tumor Research Institute, The First Affiliated Hospital, Medical School of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Teng Yang
- Clinical Research Center, Guangdong Medical College, Zhanjiang 524001, China
| | - David W Kamp
- Department of Medicine, Northwestern University Feinberg School of Medicine and Jesse Brown VA Medical Center, 240 E. Huron, McGaw M-330, Chicago, IL 60611, USA
| | - Bin Wu
- Department of Respiratory Medicine, Affiliated Hospital of Guangdong Medical College, Zhanjiang 524001, China
| | - Gang Liu
- Clinical Research Center, Guangdong Medical College, Zhanjiang 524001, China; Department of Respiratory Medicine, Affiliated Hospital of Guangdong Medical College, Zhanjiang 524001, China.
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203
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Wang H, Yan C, Shi X, Zheng J, Deng L, Yang L, Yu F, Yang Y, Shao Y. MicroRNA-575 targets BLID to promote growth and invasion of non-small cell lung cancer cells. FEBS Lett 2015; 589:805-11. [PMID: 25728273 DOI: 10.1016/j.febslet.2015.02.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 02/10/2015] [Accepted: 02/11/2015] [Indexed: 01/27/2023]
Abstract
This study was designed to detect miR-575 expression and function in non-small cell lung cancer (NSCLC). A higher expression of miR-575 in NSCLC tissues was observed compared with adjacent non-neoplastic tissues. Furthermore, re-introduction of miR-575 significantly promoted cell proliferation, migration, and invasion in the NSCLC line. Moreover, we showed that BLID is negatively regulated by miR-575 at the posttranscriptional level, via a specific target site within the 3'UTR. Overexpression of BLID counteracted miR-575-induced proliferation and invasion in NSCLC cells. The expression of BLID is frequently downregulated in NSCLC tumors and cell lines and inversely correlates with miR-575 expression. The findings of this study contribute to the current understanding of the functions of miR-575 in NSCLC.
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Affiliation(s)
- Hongwei Wang
- Department of Respiratory, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China
| | - Chunhua Yan
- Department of Respiratory, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China
| | - Xiaodong Shi
- Department of Neurology, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China
| | - Jiaolin Zheng
- Department of Neurology, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China
| | - Lili Deng
- Department of Oncology, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China
| | - Lei Yang
- Department of Thoracic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China
| | - Fangfei Yu
- Department of Respiratory, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China
| | - Yuandi Yang
- Department of Respiratory, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China
| | - Yuxia Shao
- Department of Respiratory, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, PR China.
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204
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Ye P, Liu Y, Chen C, Tang F, Wu Q, Wang X, Liu CG, Liu X, Liu R, Liu Y, Zheng P. An mTORC1-Mdm2-Drosha axis for miRNA biogenesis in response to glucose- and amino acid-deprivation. Mol Cell 2015; 57:708-720. [PMID: 25639470 DOI: 10.1016/j.molcel.2014.12.034] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 10/28/2014] [Accepted: 12/21/2014] [Indexed: 12/21/2022]
Abstract
mTOR senses nutrient and energy status to regulate cell survival and metabolism in response to environmental changes. Surprisingly, targeted mutation of Tsc1, a negative regulator of mTORC1, caused a broad reduction in miRNAs due to Drosha degradation. Conversely, targeted mutation of Raptor, an essential component of mTORC1, increased miRNA biogenesis. mTOR activation increased expression of Mdm2, which is hereby identified as the necessary and sufficient ubiquitin E3 ligase for Drosha. Drosha was induced by nutrient and energy deprivation and conferred resistance to glucose deprivation. Using a high-throughput screen of a miRNA library, we identified four miRNAs that were necessary and sufficient to protect cells against glucose-deprivation-induced apoptosis. These miRNA was regulated by glucose through the mTORC1-MDM2-DROSHA axis. Taken together, our data reveal an mTOR-Mdm2-Drosha pathway in mammalian cells that broadly regulates miRNA biogenesis as a response to alteration in cellular environment.
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Affiliation(s)
- Peiying Ye
- Center for Cancer and Immunology Research, Children's National Medical Center, Washington, DC 20010, USA
| | - Yu Liu
- State Key Laboratory of Biotherapy, West China Center of Medical Sciences, Sichuan University, Chengdu, 610041 Sichuan, China
| | - Chong Chen
- State Key Laboratory of Biotherapy, West China Center of Medical Sciences, Sichuan University, Chengdu, 610041 Sichuan, China
| | - Fei Tang
- Center for Cancer and Immunology Research, Children's National Medical Center, Washington, DC 20010, USA
| | - Qi Wu
- Departments of Neurology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Xiang Wang
- Center for Cancer and Immunology Research, Children's National Medical Center, Washington, DC 20010, USA
| | - Chang-Gong Liu
- Department of Experimental Therapeutics, MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Xiuping Liu
- Department of Experimental Therapeutics, MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Runhua Liu
- Department of Genetics, University of Alabama, Birmingham, Birmingham, AL 35294, USA
| | - Yang Liu
- Center for Cancer and Immunology Research, Children's National Medical Center, Washington, DC 20010, USA.
| | - Pan Zheng
- Center for Cancer and Immunology Research, Children's National Medical Center, Washington, DC 20010, USA.
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205
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Cao G, Dong W, Meng X, Liu H, Liao H, Liu S. MiR-511 inhibits growth and metastasis of human hepatocellular carcinoma cells by targeting PIK3R3. Tumour Biol 2015; 36:4453-9. [DOI: 10.1007/s13277-015-3085-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 01/08/2015] [Indexed: 12/15/2022] Open
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206
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Abstract
The insulin-like growth factor 1 (IGF-1) signaling pathway regulates critical biological processes including development, homeostasis, and aging. Dysregulation of this pathway has been implicated in a myriad of diseases such as cancers, neurodegenerative diseases, and metabolic disorders, making the IGF-1 signaling pathway a prime target to develop therapeutic and intervention strategies. Recently, small non-coding RNA molecules in ∼22 nucleotide length, microRNAs (miRNAs), have emerged as a new regulator of biological processes in virtually all organ systems and increasing studies are linking altered miRNA function to disease mechanisms. A miRNA binds to 3'UTRs of multiple target genes and coordinately downregulates their expression, thereby exerting a profound influence on gene regulatory networks. Here we review the components of the IGF-1 signaling pathway that are known targets of miRNA regulation, and highlight recent studies that suggest therapeutic potential of these miRNAs against various diseases.
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Affiliation(s)
- Hwa Jin Jung
- Department of Genetics, Albert Einstein College of Medicine New York, NY, USA
| | - Yousin Suh
- Department of Genetics, Albert Einstein College of Medicine New York, NY, USA ; Department of Medicine, Albert Einstein College of Medicine New York, NY, USA ; Institute for Aging Research, Diabetes Research and Training Center, Albert Einstein College of Medicine New York, NY, USA
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207
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Cai Z, Xu D, Zhang Q, Zhang J, Ngai SM, Shao J. Classification of lung cancer using ensemble-based feature selection and machine learning methods. MOLECULAR BIOSYSTEMS 2014; 11:791-800. [PMID: 25512221 DOI: 10.1039/c4mb00659c] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Lung cancer is one of the leading causes of death worldwide. There are three major types of lung cancers, non-small cell lung cancer (NSCLC), small cell lung cancer (SCLC) and carcinoid. NSCLC is further classified into lung adenocarcinoma (LADC), squamous cell lung cancer (SQCLC) as well as large cell lung cancer. Many previous studies demonstrated that DNA methylation has emerged as potential lung cancer-specific biomarkers. However, whether there exists a set of DNA methylation markers simultaneously distinguishing such three types of lung cancers remains elusive. In the present study, ROC (Receiving Operating Curve), RFs (Random Forests) and mRMR (Maximum Relevancy and Minimum Redundancy) were proposed to capture the unbiased, informative as well as compact molecular signatures followed by machine learning methods to classify LADC, SQCLC and SCLC. As a result, a panel of 16 DNA methylation markers exhibits an ideal classification power with an accuracy of 86.54%, 84.6% and a recall 84.37%, 85.5% in the leave-one-out cross-validation (LOOCV) and independent data set test experiments, respectively. Besides, comparison results indicate that ensemble-based feature selection methods outperform individual ones when combined with the incremental feature selection (IFS) strategy in terms of the informative and compact property of features. Taken together, results obtained suggest the effectiveness of the ensemble-based feature selection approach and the possible existence of a common panel of DNA methylation markers among such three types of lung cancer tissue, which would facilitate clinical diagnosis and treatment.
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Affiliation(s)
- Zhihua Cai
- Affiliated Cancer Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
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208
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Liang H, Liu M, Yan X, Zhou Y, Wang W, Wang X, Fu Z, Wang N, Zhang S, Wang Y, Zen K, Zhang CY, Hou D, Li J, Chen X. miR-193a-3p functions as a tumor suppressor in lung cancer by down-regulating ERBB4. J Biol Chem 2014; 290:926-40. [PMID: 25391651 DOI: 10.1074/jbc.m114.621409] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
ERBB4, one of four ErbB receptor tyrosine kinase family members, plays an important role in the etiology and progression of lung cancer. In this study, we found that the ERBB4 protein levels were consistently up-regulated in lung cancer tissues, whereas the mRNA levels varied randomly, suggesting that a post-transcriptional mechanism was involved in regulating ERBB4 expression. Because microRNAs are powerful post-transcriptional regulators of gene expression, we used bioinformatic analyses to search for microRNAs that can potentially target ERBB4. We identified specific targeting sites for miR-193a-3p in the 3'-UTR of ERBB4. We further identified an inverse correlation between miR-193a-3p levels and ERBB4 protein levels, but not mRNA levels, in lung cancer tissue samples. By overexpressing or knocking down miR-193a-3p in lung cancer cells, we experimentally confirmed that miR-193a-3p directly recognizes the 3'-UTR of the ERBB4 transcript and regulates ERBB4 expression. Furthermore, the biological consequences of the targeting of ERBB4 by miR-193a-3p were examined in vitro via cell proliferation, invasion, and apoptosis assays and in vivo using a mouse xenograft tumor model. We demonstrated that the repression of ERBB4 by miR-193a-3p suppressed proliferation and invasion and promoted apoptosis in lung cancer cells and that miR-193a-3p exerted an anti-tumor effect by negatively regulating ERBB4 in xenograft mice. Taken together, our findings provide the first clues regarding the role of miR-193a-3p as a tumor suppressor in lung cancer through the inhibition of ERBB4 translation.
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Affiliation(s)
- Hongwei Liang
- From the Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China
| | - Minghui Liu
- From the Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China
| | - Xin Yan
- the Comprehensive Cancer Center of Drum Tower Hospital affiliated with Medical School of Nanjing University and Clinical Cancer Institute of Nanjing University, Nanjing, Jiangsu 210008, China, and
| | - Yong Zhou
- the Department of Thoracic and Cardiovascular surgery, Drum Tower Hospital affiliated with Medical School of Nanjing University, Nanjing, Jiangsu 210008, China
| | - Wengong Wang
- the Department of Thoracic and Cardiovascular surgery, Drum Tower Hospital affiliated with Medical School of Nanjing University, Nanjing, Jiangsu 210008, China
| | - Xueliang Wang
- From the Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China
| | - Zheng Fu
- From the Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China
| | - Nan Wang
- From the Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China
| | - Suyang Zhang
- From the Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China
| | - Yanbo Wang
- From the Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China
| | - Ke Zen
- From the Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China
| | - Chen-Yu Zhang
- From the Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China
| | - Dongxia Hou
- From the Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China,
| | - Jing Li
- From the Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China,
| | - Xi Chen
- From the Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China,
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209
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Deng H, Lv L, Li Y, Zhang C, Meng F, Pu Y, Xiao J, Qian L, Zhao W, Liu Q, Zhang D, Wang Y, Zhang H, He Y, Zhu J. miR-193a-3p regulates the multi-drug resistance of bladder cancer by targeting the LOXL4 gene and the oxidative stress pathway. Mol Cancer 2014; 13:234. [PMID: 25311867 PMCID: PMC4200202 DOI: 10.1186/1476-4598-13-234] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 10/06/2014] [Indexed: 12/17/2022] Open
Abstract
Background Chemoresistance is a major obstacle to the curative cancer chemotherapy and presents one of the most formidable challenges in both research and management of cancer. Results From the detailed studies of a multi-chemosensitive (5637) versus a chemoresistant (H-bc) bladder cancer cell lines, we showed that miR-193a-3p [GenBank: NR_029710.1] promotes the multi-chemoresistance of bladder cancer cells. We further demonstrated that lysyl oxidase-like 4 (LOXL4) gene [GenBank: NM_032211.6] is a direct target of miR-193a-3p and executes the former’s impact on bladder cancer chemoresistance. The Oxidative Stress pathway activity is drastically affected by a forced reversal of miR-193a-3p or LOXL4 levels in cell and may act at the downstream of LOXL4 gene to relay the miR-193a-3p’s impact on the multi-chemoresistance in both cultured cells and the tumor xenografts in nude mice. Conclusions In addition to a new mechanistic insight, our results provide a set of the essential genes in this newly identified miR-193a-3p/LOXL4/Oxidative Stress axis as the diagnostic targets for a guided anti-bladder cancer chemotherapy. Electronic supplementary material The online version of this article (doi:10.1186/1476-4598-13-234) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Jingde Zhu
- Cancer Epigenetics Program, Anhui Cancer Hospital, Hefei 230031, Anhui, China.
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210
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Zhang P, Ji DB, Han HB, Shi YF, Du CZ, Gu J. Downregulation of miR-193a-5p correlates with lymph node metastasis and poor prognosis in colorectal cancer. World J Gastroenterol 2014; 20:12241-12248. [PMID: 25232258 PMCID: PMC4161809 DOI: 10.3748/wjg.v20.i34.12241] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 05/08/2014] [Accepted: 05/29/2014] [Indexed: 02/07/2023] Open
Abstract
AIM: To investigate the correlation of miR-193a-5p with lymph node metastasis and postoperative survival of colorectal cancer (CRC) patients.
METHODS: A total of 304 formalin-fixed, paraffin-embedded specimens (69 paired cancer and normal tissues, 55 primary tumors of stage III CRC and matched lymph nodes, and 56 primary tumors of stage II CRC) were included in this study. The relative expression levels of miR-193a-5p in the normal mucosa, primary cancer, and metastatic lymph node lesions were measured by quantitative real-time reverse transcriptase polymerase chain reaction. We evaluated the association of its expression with colorectal cancer lymph node metastasis, clinicopathological factors, and patient survival.
RESULTS: The relative expression level of miR-193a-5p was significantly lower in CRC tissues than in the normal mucosa (P = 0.0060). The expression levels of miR-193a-5p were lower in primary CRC tissues with lymph node metastases than in those without metastases (P = 0.0006), and decreased expression of miR-193a-5p correlated with advanced lymph node metastatic stage (P = 0.0007). Kaplan-Meier analysis showed that patients with low miR-193a-5p expression had decreased disease-free survival (DFS) (P = 0.0026) and poor overall survival (OS) (P = 0.0003). Interestingly, for the group of patients with lymph node metastases, miR-193a-5p expression was also related to survival. Patients with low miR-193a-5p expression had decreased DFS (P = 0.0262) and poor OS (P = 0.0230). Moreover, multivariate analysis indicated that downregulation of miR-193a-5p was an independent predictor of poor OS.
CONCLUSION: Downregulation of miR-193a-5p correlates with lymph node metastasis and poor survival of CRC. miR-193a-5p may be a useful biomarker for CRC diagnosis, metastasis and prognosis prediction.
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211
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Li J, Tan Q, Yan M, Liu L, Lin H, Zhao F, Bao G, Kong H, Ge C, Zhang F, Yu T, Li J, He X, Yao M. miRNA-200c inhibits invasion and metastasis of human non-small cell lung cancer by directly targeting ubiquitin specific peptidase 25. Mol Cancer 2014; 13:166. [PMID: 24997798 PMCID: PMC4105889 DOI: 10.1186/1476-4598-13-166] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 07/02/2014] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Growing evidence indicates that miR-200c is involved in carcinogenesis and tumor progression in non-small-cell lung cancer (NSCLC). However, its precise biological role remains largely elusive. METHODS The functions of miR-200c and USP25 in migration/invasion and lung metastasis formation were determined by transwell and tail vein injection assays, respectively. The potential regulatory targets of miR-200c were determined by prediction tools, correlation with target protein expression, and luciferase reporter assay. The mRNA expression levels of miR-200c and USP25 were examined in NSCLC cell lines and patient specimens using quantitative reverse transcription-PCR. The protein expression levels of USP25 were examined in NSCLC cell lines and patient specimens using western blot and immunohistochemical staining. RESULTS We demonstrated that over-expression of miR-200c inhibited NSCLC cells migration, invasion, epithelial-mesenchymal transition (EMT) in vitro and lung metastasis formation in vivo. Further studies revealed that USP25 was a downstream target of miR-200c in NSCLC cells as miR-200c bound directly to the 3'-untranslated region of USP25, thus reducing both the messenger RNA and protein levels of USP25. Silencing of the USP25 gene recapitulated the effects of miR-200c over-expression. Clinical analysis indicated that miR-200c was negatively correlated with clinical stage, lymph node metastasis in NSCLC patients. Moreover, USP25 protein and mRNA level expressions were higher in NSCLC patients, compared to healthy control, and correlated with clinical stage and lymphatic node metastasis. CONCLUSIONS These findings indicate that miR-200c exerts tumor-suppressive effects for NSCLC through the suppression of USP25 expression and suggests a new therapeutic application of miR-200c in the treatment of NSCLC.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | - Ming Yao
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, 200032 Shanghai, China.
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