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miR-152 down-regulation is associated with MET up-regulation in leiomyosarcoma and undifferentiated pleomorphic sarcoma. Cell Oncol (Dordr) 2016; 40:77-88. [PMID: 27900663 DOI: 10.1007/s13402-016-0306-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/14/2016] [Indexed: 02/07/2023] Open
Abstract
PURPOSE Highly aggressive adult soft tissue sarcomas (STS), i.e., leiomyosarcomas (LMS) and undifferentiated pleomorphic sarcomas (UPS), present complex genomic anomalies and overall 5-year survival rates of 20 to 40%. Here, we aimed to identify new biomarkers that may be employed to improve the treatment of non-translocation STS patients. We validated 12 miRNAs implicated in tumor development using primary STS samples and selected miR-152 for further analysis in STS-derived cell lines. METHODS 59 primary STS samples (27 LMS and 32 UPS) and 10 matched normal control tissues were included in the study, as well as 3 STS-derived cell lines (HT1080, SW872 and SKLMS1) and a normal control mesenchymal cell line (hMSC). miRNA expression analyses were performed using a TaqMan microRNA Array platform and qRT-PCR (miR-152), respectively. The expression levels of the putative miR-152 targets MET and KIT were assessed using qRT-PCR and immunohistochemistry on tissue microarrays, respectively. In addition, various functional analyses were performed before and after miR-152 transfection into SKLMS1 cells. RESULTS We found that 12 pre-selected miRNAs were down-regulated in primary STS tumor samples compared to its normal control samples. A statistically significant miR-152 down-regulation was found to be accompanied by high MET and KIT mRNA levels in both the primary samples and the STS-derived cell lines tested. miR-152 transfection in SKLMS1 cells led to a reduction in KIT and MET mRNA and protein levels which, in turn, was associated with a transient down-regulation of the PI3K/AKT pathway, a transient decrease in cell growth, and a transient increase in both apoptotic and S-phase cells. CONCLUSIONS Our data indicate that over-expression of MET and KIT in primary STS samples and its derived cell lines is associated with miR-152 down-regulation. This shift may play a role in STS development and, thus, may be used to identify patients at risk. The effect of MET down-regulation on downstream signaling pathways, such as the PI3K/AKT pathway, may provide a basis for the future design of novel STS treatment strategies.
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Chen J, Gao S, Wang C, Wang Z, Zhang H, Huang K, Zhou B, Li H, Yu Z, Wu J, Chen C. Pathologically decreased expression of miR-193a contributes to metastasis by targeting WT1-E-cadherin axis in non-small cell lung cancers. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2016; 35:173. [PMID: 27821145 PMCID: PMC5100283 DOI: 10.1186/s13046-016-0450-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 10/25/2016] [Indexed: 12/21/2022]
Abstract
Background The metastatic cascade is a complex and multistep process with many potential barriers. Recently, miR-193a has been reported to be a suppressive miRNA in multiple types of cancers, but its underlying anti-oncogenic activity in non-small cell lung cancers (NSCLC) is not fully elucidated. Methods The expressions of miR-193a (miR-193a-5p) in human lung cancer tissues and cell lines were detected by real-time PCR. Dual-luciferase reporter assay was used to identify the direct target of miR-193a. Cell proliferation, apoptosis, and metastasis were assessed by CCK-8, flow cytometry, and Transwell assay, respectively. Results The expression of miR-193a in lung cancer tissues was decreased comparing to adjacent non-tumor tissues due to DNA hypermethylation in lung cancer tissues. Ectopic expression of miR-193a inhibited cell proliferation, colony formation, migration, and invasion in A549 and H1299 cells. Moreover, overexpression of miR-193a partially reversed tumor growth factor-β1 (TGF-β1)-induced epithelial-to-mesenchymal transition (EMT) in NSCLC cells. Mechanistically, miR-193a reduced the expression of WT1, which negatively regulated the protein level of E-cadherin, suggesting that miR-193a might prevent EMT via modulating WT1-E-cadherin axis. Importantly, knockdown of WT1 resembled the anti-cancer activity by miR-193a and overexpression of WT1 partially reversed miR-193a-induced anti-cancer activity, indicating that WT1 plays an important role in miR-193a-induced anti-cancer activity. Finally, overexpression of miR-193a decreased the growth of tumor xenografts in mice. Conclusion Collectively, our results have revealed an important role of miR-193a-WT1-E-cadherin axis in metastasis, demonstrated an important molecular cue for EMT, and suggested a therapeutic strategy of restoring miR-193a expression in NSCLC. Electronic supplementary material The online version of this article (doi:10.1186/s13046-016-0450-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Junjie Chen
- Department of Respiration, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang, Ouhai District, Wenzhou, 325000, Zhejiang Province, China
| | - Shenmeng Gao
- Laboratory of Internal Medicine, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang, Ouhai District, Wenzhou, Zhejiang Province, China
| | - Chunjing Wang
- School of Laboratory Medicine & School of Life Science, Wenzhou Medical University, Nanbaixiang, Ouhai District, Wenzhou, Zhejiang Province, China
| | - Zhonggai Wang
- School of Laboratory Medicine & School of Life Science, Wenzhou Medical University, Nanbaixiang, Ouhai District, Wenzhou, Zhejiang Province, China
| | - Huxiang Zhang
- Pathology Department, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang, Ouhai District, Wenzhou, Zhejiang Province, China
| | - Kate Huang
- Pathology Department, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang, Ouhai District, Wenzhou, Zhejiang Province, China
| | - Bin Zhou
- Laboratory of Internal Medicine, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang, Ouhai District, Wenzhou, Zhejiang Province, China
| | - Haiying Li
- Laboratory of Internal Medicine, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang, Ouhai District, Wenzhou, Zhejiang Province, China
| | - Zhijie Yu
- Laboratory of Internal Medicine, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang, Ouhai District, Wenzhou, Zhejiang Province, China
| | - Jianbo Wu
- Laboratory of Internal Medicine, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang, Ouhai District, Wenzhou, Zhejiang Province, China.
| | - Chengshui Chen
- Department of Respiration, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang, Ouhai District, Wenzhou, 325000, Zhejiang Province, China
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Merhautova J, Demlova R, Slaby O. MicroRNA-Based Therapy in Animal Models of Selected Gastrointestinal Cancers. Front Pharmacol 2016; 7:329. [PMID: 27729862 PMCID: PMC5037200 DOI: 10.3389/fphar.2016.00329] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 09/06/2016] [Indexed: 12/14/2022] Open
Abstract
Gastrointestinal cancer accounts for the 20 most frequent cancer diseases worldwide and there is a constant urge to bring new therapeutics with new mechanism of action into the clinical practice. Quantity of in vitro and in vivo evidences indicate, that exogenous change in pathologically imbalanced microRNAs (miRNAs) is capable of transforming the cancer cell phenotype. This review analyzed preclinical miRNA-based therapy attempts in animal models of gastric, pancreatic, gallbladder, and colorectal cancer. From more than 400 original articles, 26 was found to assess the effect of miRNA mimics, precursors, expression vectors, or inhibitors administered locally or systemically being an approach with relatively high translational potential. We have focused on mapping available information on animal model used (animal strain, cell line, xenograft method), pharmacological aspects (oligonucleotide chemistry, delivery system, posology, route of administration) and toxicology assessments. We also summarize findings in the field pharmacokinetics and toxicity of miRNA-based therapy.
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Affiliation(s)
- Jana Merhautova
- Molecular Oncology II - Solid Cancer, Central European Institute of Technology, Masaryk UniversityBrno, Czech Republic; Department of Pharmacology, Faculty of Medicine, Masaryk UniversityBrno, Czech Republic
| | - Regina Demlova
- Department of Pharmacology, Faculty of Medicine, Masaryk University Brno, Czech Republic
| | - Ondrej Slaby
- Molecular Oncology II - Solid Cancer, Central European Institute of Technology, Masaryk UniversityBrno, Czech Republic; Masaryk Memorial Cancer InstituteBrno, Czech Republic
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154
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Erbes T, Hirschfeld M, Waldeck S, Rücker G, Jäger M, Willmann L, Kammerer B, Mayer S, Gitsch G, Stickeler E. Hyperthermia-driven aberrations of secreted microRNAs in breast cancer in vitro. Int J Hyperthermia 2016; 32:630-42. [PMID: 27380148 DOI: 10.3109/02656736.2016.1161832] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
PURPOSE Expression profile alterations of nine breast cancer (BC)-associated secreted microRNAs (miRs) were determined under microenvironmental alterations occurring in tumour progression, metastasis or specific oncological treatment modalities. Thereto, the potential influence of the exogenic stimuli hypoxia, acidosis and hyperthermia was investigated in vitro. MATERIAL AND METHODS Four established BC cell lines were applied as in vitro BC model systems. Quantitative analyses of secreted microRNA specimens were performed by RNA isolation from cell culture supernatant and subsequent real-time PCR in cells under physiological versus hypoxic, acidic or hyperthermia conditions. RESULTS The in vitro application of exogenic stimuli hypoxia, extracellular acidosis and hyperthermia caused heterogeneous expression alterations for the investigated secreted miRNA phenotypes. The majority of relevant exogenic stimuli-dependent microRNA expression alterations were restricted to single events displaying distinct cell type and stimulus dependent correlations only. Most remarkably, hyperthermia triggered a uniform significant down-regulatory effect on the expression levels of the three secreted microRNAs miR-10b, miR-15b and miR-139, respectively. The marked decrease in miR-10b and miR-15b levels was detectable in all four, while miR-139 was found significantly reduced in three out of four BC cell lines. CONCLUSION Hyperthermia-dependent down-regulatory influence on three distinct BC-related microRNAs in vitro generates translational aspects for clinical BC treatment, since the identified microRNAs miR-10b, miR-15b and miR-139 are known to have oncogenic as well as tumour suppressor functions in BC. However, an evaluation regarding the potential impact of microRNA-related hyperthermia-dependent alterations for innovative BC treatment approaches demands further analysis including in vivo data.
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Affiliation(s)
- Thalia Erbes
- a Department of Gynaecology and Obstetrics, Medical Centre , University of Freiburg , Freiburg , Germany
| | - Marc Hirschfeld
- a Department of Gynaecology and Obstetrics, Medical Centre , University of Freiburg , Freiburg , Germany ;,b German Cancer Consortium (DKTK) , German Cancer Research Center (DKFZ) , Heidelberg , Germany ;,c Institute of Veterinary Medicine , Georg-August-University , Göttingen , Germany
| | - Silvia Waldeck
- d Department of Internal Medicine I, Medical Centre , University of Freiburg , Freiburg , Germany
| | - Gerta Rücker
- e Institute for Medical Biometry and Statistics, Medical Centre , University of Freiburg , Freiburg , Germany
| | - Markus Jäger
- a Department of Gynaecology and Obstetrics, Medical Centre , University of Freiburg , Freiburg , Germany
| | - Lucas Willmann
- f Centre for Biological Systems Analysis (ZBSA) , Albert-Ludwigs University , Freiburg , Germany ;,g Institute of Biology II , Albert-Ludwigs University , Freiburg , Germany
| | - Bernd Kammerer
- f Centre for Biological Systems Analysis (ZBSA) , Albert-Ludwigs University , Freiburg , Germany
| | - Sebastian Mayer
- a Department of Gynaecology and Obstetrics, Medical Centre , University of Freiburg , Freiburg , Germany
| | - Gerald Gitsch
- a Department of Gynaecology and Obstetrics, Medical Centre , University of Freiburg , Freiburg , Germany
| | - Elmar Stickeler
- a Department of Gynaecology and Obstetrics, Medical Centre , University of Freiburg , Freiburg , Germany ;,h Department of Gynaecology and Obstetrics , University Medical Centre, RWTH , Pauwelsstrasse 30 , 52074 Aachen , Germany
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155
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Zhang M, Guo Y, Wu J, Chen F, Dai Z, Fan S, Li P, Song T. Roles of microRNA-99 family in human glioma. Onco Targets Ther 2016; 9:3613-9. [PMID: 27382299 PMCID: PMC4920231 DOI: 10.2147/ott.s99363] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Objective Deregulation of microRNA (miR)-99 family members (miR-99a, miR-99b, and miR-100) has been reported to play a crucial role in many cancer types. However, their roles in human gliomas have not been fully elucidated. This study aimed to investigate the expression patterns of miR-99a, miR-99b, and miR-100 in glioma tissues and to evaluate their expression profiles with respect to tumor progression. Methods Quantitative real-time polymerase chain reaction was performed to detect the expression levels of miR-99a, miR-99b, and miR-100 in glioma and matched non-neoplastic brain tissues. Then, the associations of their expression with various clinicopathological features of glioma patients were statistically analyzed. Moreover, the roles of miR-99a, miR-99b, and miR-100 in regulating glioma cell migration and invasion were determined via transwell assay in vitro. Results Compared with non-neoplastic brain tissues, miR-99a, miR-99b, and miR-100 expression levels were all significantly decreased in glioma tissues (all P<0.001). miR-99a-low, miR-99b-low, and miR-100-low expression more frequently occurred in glioma patients with low Karnofsky performance score (<90) and high World Health Organization grade (III–IV). Further functional experiments revealed that the enforced expression of miR-99a, miR-99b, and miR-100 resulted in the inhibition of cellular migration and invasion in glioma cells. Conclusion Our results strongly suggest that the aberrant expression of miR-99a, miR-99b, and miR-100 may be a common feature in human gliomas with aggressive clinicopathological features and may participate in malignant phenotypes of the tumors. These findings highlight the potential of the three miR-99 family members as novel therapeutic targets for human gliomas.
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Affiliation(s)
- Mingyu Zhang
- Department of Neurosurgery, Xiangya Hospital of Central South University, Changsha
| | - Yong Guo
- Department of Neurosurgery, Xiangya Hospital of Central South University, Changsha
| | - Jun Wu
- Department of Neurosurgery, Xiangya Hospital of Central South University, Changsha
| | - Fenghua Chen
- Department of Neurosurgery, Xiangya Hospital of Central South University, Changsha
| | - Zhijie Dai
- Institute of Endocrinology and Metabolism, Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Shuangshi Fan
- Department of Neurosurgery, Xiangya Hospital of Central South University, Changsha
| | - Pengcheng Li
- Department of Neurosurgery, Xiangya Hospital of Central South University, Changsha
| | - Tao Song
- Department of Neurosurgery, Xiangya Hospital of Central South University, Changsha
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156
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Wang F, Nazarali AJ, Ji S. Circular RNAs as potential biomarkers for cancer diagnosis and therapy. Am J Cancer Res 2016; 6:1167-1176. [PMID: 27429839 PMCID: PMC4937728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 05/10/2016] [Indexed: 06/06/2023] Open
Abstract
Circular RNAs (circRNAs) are a naturally occurring type of universal and diverse endogenous noncoding RNAs which unlike linear RNAs, have covalently linked ends. They are usually stable, abundant, conserved RNA molecules and often exhibit tissue/developmental-stage specific expression. Functional circRNAs have been identified to act as microRNA sponges and RNA-binding protein (RBP) sequestering agents as well as transcriptional regulators. These multiple functional roles elicit a great potential for circRNAs in biological applications. Emerging evidence shows that circRNAs play important roles in several diseases, particularly in cancer where they act through regulating protein expression of the pivotal genes that are critical for carcinogenesis. The presence of abundant circRNAs in saliva, exosomes and clinical standard blood samples will make them potential diagnostic or predictive biomarkers for diseases, particularly for cancer development, progression and prognosis. Here, we review the current literature and provide evidence for the impact of circRNAs in cancers and their potential significance in cancer prognosis and clinical treatment.
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Affiliation(s)
- Fengling Wang
- Department of Biochemistry and Molecular Biology, Medical School, Henan UniversityChina
| | - Adil J Nazarali
- College of Pharmacy and Nutrition and Neuroscience Research Cluster, University of SaskatchewanCanada
| | - Shaoping Ji
- Department of Biochemistry and Molecular Biology, Medical School, Henan UniversityChina
- College of Pharmacy and Nutrition and Neuroscience Research Cluster, University of SaskatchewanCanada
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Wang M, Ge X, Zheng J, Li D, Liu X, Wang L, Jiang C, Shi Z, Qin L, Liu J, Yang H, Liu LZ, He J, Zhen L, Jiang BH. Role and mechanism of miR-222 in arsenic-transformed cells for inducing tumor growth. Oncotarget 2016; 7:17805-14. [PMID: 26909602 PMCID: PMC4951251 DOI: 10.18632/oncotarget.7525] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2015] [Accepted: 01/14/2016] [Indexed: 12/26/2022] Open
Abstract
High levels of arsenic in drinking water, soil, and air are associated with the higher incidences of several kinds of cancers worldwide, but the mechanism is yet to be fully discovered. Recently, a number of evidences show that dysregulation of microRNAs (miRNAs) induces carcinogenesis. In this study, we found miR-222 was upregulated in arsenic-transformed human lung epithelial BEAS-2B cells (As-T cells). Anti-miR-222 inhibitor treatment decreased cell proliferation, migration, tube formation, and induced apoptosis. In addition, anti-miR-222 inhibitor expression decreased tumor growth in vivo. We also found that inhibition of miR-222 induced the expression of its direct targets ARID1A and phosphatase and tensin homolog deleted on chromosome 10 (PTEN), and activated apoptosis of As-T cells in part through ARID1A downregulation. These results indicate that miR-222 plays an important role in arsenic-induced tumor growth.
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Affiliation(s)
- Min Wang
- State Key Laboratory of Reproductive Medicine, Department of Pathology, and Collaborative Innovation Center for Cancer Personalized Medicine, Cancer Center, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xin Ge
- State Key Laboratory of Reproductive Medicine, Department of Pathology, and Collaborative Innovation Center for Cancer Personalized Medicine, Cancer Center, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jitai Zheng
- State Key Laboratory of Reproductive Medicine, Department of Pathology, and Collaborative Innovation Center for Cancer Personalized Medicine, Cancer Center, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Dongmei Li
- State Key Laboratory of Reproductive Medicine, Department of Pathology, and Collaborative Innovation Center for Cancer Personalized Medicine, Cancer Center, Nanjing Medical University, Nanjing, Jiangsu, China
- Ninggao Personalized Medicine and Technology Innovation Center, Nanjing, Jiangsu, China
| | - Xue Liu
- State Key Laboratory of Reproductive Medicine, Department of Pathology, and Collaborative Innovation Center for Cancer Personalized Medicine, Cancer Center, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Lin Wang
- State Key Laboratory of Reproductive Medicine, Department of Pathology, and Collaborative Innovation Center for Cancer Personalized Medicine, Cancer Center, Nanjing Medical University, Nanjing, Jiangsu, China
- Ninggao Personalized Medicine and Technology Innovation Center, Nanjing, Jiangsu, China
| | - Chengfei Jiang
- State Key Laboratory of Reproductive Medicine, Department of Pathology, and Collaborative Innovation Center for Cancer Personalized Medicine, Cancer Center, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Zhumei Shi
- State Key Laboratory of Reproductive Medicine, Department of Pathology, and Collaborative Innovation Center for Cancer Personalized Medicine, Cancer Center, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Lianju Qin
- Center of Clinical Reproductive Medicine, Jiangsu Province Hospital, Nanjing, Jiangsu, China
| | - Jiayin Liu
- Center of Clinical Reproductive Medicine, Jiangsu Province Hospital, Nanjing, Jiangsu, China
| | - Hushan Yang
- Division of Population Science, Department of Medical Oncology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Ling-Zhi Liu
- Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Jun He
- Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Linlin Zhen
- Department of Breast and Thyroid Surgery, Huai'an First People's Hospital, Huai'an, Jiangsu, China
| | - Bing-Hua Jiang
- State Key Laboratory of Reproductive Medicine, Department of Pathology, and Collaborative Innovation Center for Cancer Personalized Medicine, Cancer Center, Nanjing Medical University, Nanjing, Jiangsu, China
- Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, PA, USA
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158
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Gurtner A, Falcone E, Garibaldi F, Piaggio G. Dysregulation of microRNA biogenesis in cancer: the impact of mutant p53 on Drosha complex activity. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2016; 35:45. [PMID: 26971015 PMCID: PMC4789259 DOI: 10.1186/s13046-016-0319-x] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 03/03/2016] [Indexed: 12/13/2022]
Abstract
A widespread decrease of mature microRNAs is often observed in human malignancies giving them potential to act as tumor suppressors. Thus, microRNAs may be potential targets for cancer therapy. The global miRNA deregulation is often the result of defects in the miRNA biogenesis pathway, such as genomic mutation or aberrant expression/localization of enzymes and cofactors responsible of miRNA maturation. Alterations in the miRNA biogenesis machinery impact on the establishment and development of cancer programs. Accumulation of pri-microRNAs and corresponding depletion of mature microRNAs occurs in human cancers compared to normal tissues, strongly indicating an impairment of crucial steps in microRNA biogenesis. In agreement, inhibition of microRNA biogenesis, by depletion of Dicer1 and Drosha, tends to enhance tumorigenesis in vivo. The p53 tumor suppressor gene, TP53, is mutated in half of human tumors resulting in an oncogene with Gain-Of-Function activities. In this review we discuss recent studies that have underlined a role of mutant p53 (mutp53) on the global regulation of miRNA biogenesis in cancer. In particular we describe how a new transcriptionally independent function of mutant p53 in miRNA maturation, through a mechanism by which this oncogene is able to interfere with the Drosha processing machinery, generally inhibits miRNA processing in cancer and consequently impacts on carcinogenesis.
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Affiliation(s)
- Aymone Gurtner
- Department of Research, Advanced Diagnostics, and Technological Innovation, Regina Elena National Cancer Institute, 00144, Rome, Italy
| | - Emmanuela Falcone
- Department of Research, Advanced Diagnostics, and Technological Innovation, Regina Elena National Cancer Institute, 00144, Rome, Italy
| | - Francesca Garibaldi
- Department of Research, Advanced Diagnostics, and Technological Innovation, Regina Elena National Cancer Institute, 00144, Rome, Italy.
| | - Giulia Piaggio
- Department of Research, Advanced Diagnostics, and Technological Innovation, Regina Elena National Cancer Institute, 00144, Rome, Italy
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159
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Zhang S, Gao L, Thakur A, Shi P, Liu F, Feng J, Wang T, Liang Y, Liu JJ, Chen M, Ren H. miRNA-204 suppresses human non-small cell lung cancer by targeting ATF2. Tumour Biol 2016; 37:11177-86. [PMID: 26935060 DOI: 10.1007/s13277-016-4906-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 01/22/2016] [Indexed: 12/16/2022] Open
Abstract
MicroRNAs (miRNAs) play a critical role in cancer development and progression. Deregulated expression of miR-204 has been reported in several cancers, but the mechanism through which miR-204 modulates human non-small cell lung cancer (NSCLC) is largely unknown. In this study, we investigate the expression and functional role of miR-204 in human NSCLC tissues and cell lines. RNA isolation, qRT-PCR, MTT, colony formation assay, cell cycle assay, cell apoptosis assay, cell migration assay, and Western blot were performed. Statistical analysis was performed using SPSS 18.0 software and statistical significance was accepted at p value <0.05. miR-204 level was significantly reduced in NSCLC tissues as compared to that of non-neoplastic tissues. Transient over-expression of miR-204 by transfecting with miR-204 mimics suppressed NSCLC cell proliferation, migration, and induced apoptosis and G1 arrest, whereas inhibition of miR-204 showed the converse effects. Additionally, activating transcription factor 2 (ATF2), an important transcription factor, was demonstrated as a potential target gene of miR-204. Subsequent investigations found a negative correlation between miR-204 level and ATF2 expression in NSCLC tissue samples. Moreover, we observed that miR-204 expression inversely affected endogenous ATF2 expression at both mRNA and protein levels in vitro. Taken together, miR-204 may act as a tumor suppressor by directly targeting ATF2 in NSCLC.
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Affiliation(s)
- Shuo Zhang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China.,Shaanxi Provincial Research Center for the Project of Prevention and Treatment of Respiratory Diseases, Xi'an, Shaanxi, People's Republic of China
| | - Lei Gao
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China.,Shaanxi Provincial Research Center for the Project of Prevention and Treatment of Respiratory Diseases, Xi'an, Shaanxi, People's Republic of China
| | - Asmitananda Thakur
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China.,Shaanxi Provincial Research Center for the Project of Prevention and Treatment of Respiratory Diseases, Xi'an, Shaanxi, People's Republic of China.,Department of Internal Medicine, Life Guard Hospital, Biratnagar, Nepal.,S. R. Laboratory and Diagnostic Center, Biratnagar, Nepal
| | - Puyu Shi
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China.,Shaanxi Provincial Research Center for the Project of Prevention and Treatment of Respiratory Diseases, Xi'an, Shaanxi, People's Republic of China
| | - Feng Liu
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China.,Shaanxi Provincial Research Center for the Project of Prevention and Treatment of Respiratory Diseases, Xi'an, Shaanxi, People's Republic of China
| | - Jing Feng
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China.,Shaanxi Provincial Research Center for the Project of Prevention and Treatment of Respiratory Diseases, Xi'an, Shaanxi, People's Republic of China
| | - Ting Wang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China.,Shaanxi Provincial Research Center for the Project of Prevention and Treatment of Respiratory Diseases, Xi'an, Shaanxi, People's Republic of China
| | - Yiqian Liang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China.,Shaanxi Provincial Research Center for the Project of Prevention and Treatment of Respiratory Diseases, Xi'an, Shaanxi, People's Republic of China
| | - Johnson J Liu
- Department of Pharmacology, School of Medical Sciences, University of New South Wales, Sydney, Australia
| | - Mingwei Chen
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China. .,Shaanxi Provincial Research Center for the Project of Prevention and Treatment of Respiratory Diseases, Xi'an, Shaanxi, People's Republic of China.
| | - Hui Ren
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China. .,Shaanxi Provincial Research Center for the Project of Prevention and Treatment of Respiratory Diseases, Xi'an, Shaanxi, People's Republic of China.
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160
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Predictive Value of Plasma MicroRNA-216a/b in the Diagnosis of Esophageal Squamous Cell Carcinoma. DISEASE MARKERS 2016; 2016:1857067. [PMID: 26989293 PMCID: PMC4775814 DOI: 10.1155/2016/1857067] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Accepted: 01/20/2016] [Indexed: 12/23/2022]
Abstract
Esophageal squamous cell carcinoma (ESCC) is a common human malignancy with poor survival, which was usually diagnosed at an advanced stage. MicroRNAs (miRNAs), a class of single stranded noncoding RNAs with only 17–25 ribonucleotides, were demonstrated to play an important role in lots of cancers. In the recent years, increasing evidence revealed that circulating miRNAs exhibited great potential in the diagnosis of various types of cancers. The present study was designed to evaluate the diagnostic value of plasma miRNA-216a/b for ESCC. Our results showed that the expression level of plasma miRNA-216a/b was significantly lower in ESCC patients compared with that of healthy controls. The receiver operating characteristic (ROC) curve analysis yielded an area under the ROC curve (AUC) value of 0.877 [95% CI (confidence interval): 0.818–0.922] for miRNA-216a and 0.756 (95% CI: 0.685–0.819) for miRNA-216b. Clinical data indicated that plasma miRNA-216a/b were inversely correlated with lymph node metastasis and TNM stage. Additionally, the plasma miRNA-216b expression level was significantly upregulated in postoperative samples compared to preoperative samples. Our study, for the first time, demonstrated that plasma miRNA-216a/b might serve as potential biomarkers for the diagnosis of ESCC and dysregulation of miRNA-216a/b might be involved in the progression of ESCC.
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161
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Nyhan MJ, O'Donovan TR, Boersma AWM, Wiemer EAC, McKenna SL. MiR-193b promotes autophagy and non-apoptotic cell death in oesophageal cancer cells. BMC Cancer 2016; 16:101. [PMID: 26878873 PMCID: PMC4754993 DOI: 10.1186/s12885-016-2123-6] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 02/03/2016] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Successful treatment of oesophageal cancer is hampered by recurrent drug resistant disease. We have previously demonstrated the importance of apoptosis and autophagy for the recovery of oesophageal cancer cells following drug treatment. When apoptosis (with autophagy) is induced, these cells are chemosensitive and will not recover following chemotherapy treatment. In contrast, when cancer cells exhibit only autophagy and limited Type II cell death, they are chemoresistant and recover following drug withdrawal. METHODS MicroRNA (miRNA) expression profiling of an oesophageal cancer cell line panel was used to identify miRNAs that were important in the regulation of apoptosis and autophagy. The effects of miRNA overexpression on cell death mechanisms and recovery were assessed in the chemoresistant (autophagy inducing) KYSE450 oesophageal cancer cells. RESULTS MiR-193b was the most differentially expressed miRNA between the chemosensitive and chemoresistant cell lines with higher expression in chemosensitive apoptosis inducing cell lines. Colony formation assays showed that overexpression of miR-193b significantly impedes the ability of KYSE450 cells to recover following 5-fluorouracil (5-FU) treatment. The critical mRNA targets of miR-193b are unknown but target prediction and siRNA data analysis suggest that it may mediate some of its effects through stathmin 1 regulation. Apoptosis was not involved in the enhanced cytotoxicity. Overexpression of miR-193b in these cells induced autophagic flux and non-apoptotic cell death. CONCLUSION These results highlight the importance of miR-193b in determining oesophageal cancer cell viability and demonstrate an enhancement of chemotoxicity that is independent of apoptosis induction.
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Affiliation(s)
- Michelle J Nyhan
- Cork Cancer Research Centre, 4th Floor Western Gateway Building, University College Cork, Cork, Ireland.
| | - Tracey R O'Donovan
- Cork Cancer Research Centre, 4th Floor Western Gateway Building, University College Cork, Cork, Ireland.
| | - Antonius W M Boersma
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, The Netherlands.
| | - Erik A C Wiemer
- Department of Medical Oncology, Erasmus MC Cancer Institute, Erasmus University Medical Center, Rotterdam, The Netherlands.
| | - Sharon L McKenna
- Cork Cancer Research Centre, 4th Floor Western Gateway Building, University College Cork, Cork, Ireland.
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162
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miR-34a inhibits the apoptosis of MDSCs by suppressing the expression of N-myc. Immunol Cell Biol 2016; 94:563-72. [PMID: 26833183 DOI: 10.1038/icb.2016.11] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 01/03/2016] [Accepted: 01/17/2016] [Indexed: 12/15/2022]
Abstract
Myeloid-derived suppressor cells (MDSCs) are a heterogeneous population of early myeloid progenitors, which possess strong immunosuppressive functions. MDSCs are found in increased numbers in infectious and inflammatory pathological conditions. However, whether microRNAs have a role in the expansion remains unclear. Here in our study, we found that overexpression of miR-34a could induce the expansion of MDSCs in the bone marrow and spleen both in chimera and transgenic mice. And further experiments demonstrated that miR-34a inhibited the apoptosis through reduced translation of N-myc without affecting the proliferation. Luciferase assay and western blotting experiments implied that N-myc is the direct target of miR-34a in MDSCs. Overexpressed mir-34a changes the cytokine expression profile in MDSCs and skewed the MDSCs to M1 phenotype. And miR-34a-overexpressed MDSCs significantly slowed down the tumor growth. Taken together, miR-34a contributes to the expansion of MDSCs by inhibiting the apoptosis via suppressing the expression of N-myc.
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163
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Abba ML, Patil N, Leupold JH, Allgayer H. MicroRNA Regulation of Epithelial to Mesenchymal Transition. J Clin Med 2016; 5:jcm5010008. [PMID: 26784241 PMCID: PMC4730133 DOI: 10.3390/jcm5010008] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 12/18/2015] [Accepted: 01/05/2016] [Indexed: 02/07/2023] Open
Abstract
Epithelial to mesenchymal transition (EMT) is a central regulatory program that is similar in many aspects to several steps of embryonic morphogenesis. In addition to its physiological role in tissue repair and wound healing, EMT contributes to chemo resistance, metastatic dissemination and fibrosis, amongst others. Classically, the morphological change from epithelial to mesenchymal phenotype is characterized by the appearance or loss of a group of proteins which have come to be recognized as markers of the EMT process. As with all proteins, these molecules are controlled at the transcriptional and translational level by transcription factors and microRNAs, respectively. A group of developmental transcription factors form the backbone of the EMT cascade and a large body of evidence shows that microRNAs are heavily involved in the successful coordination of mesenchymal transformation and vice versa, either by suppressing the expression of different groups of transcription factors, or otherwise acting as their functional mediators in orchestrating EMT. This article dissects the contribution of microRNAs to EMT and analyzes the molecular basis for their roles in this cellular process. Here, we emphasize their interaction with core transcription factors like the zinc finger enhancer (E)-box binding homeobox (ZEB), Snail and Twist families as well as some pluripotency transcription factors.
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Affiliation(s)
- Mohammed L Abba
- Department of Experimental Surgery, Center for Biomedicine and Medical Technology Mannheim (CBTM), Medical Faculty Mannheim, Ruprecht Karl University of Heidelberg, Ludolf-Krehl-Str. 6, 68135 Mannheim, Germany.
| | - Nitin Patil
- Department of Experimental Surgery, Center for Biomedicine and Medical Technology Mannheim (CBTM), Medical Faculty Mannheim, Ruprecht Karl University of Heidelberg, Ludolf-Krehl-Str. 6, 68135 Mannheim, Germany.
| | - Jörg Hendrik Leupold
- Department of Experimental Surgery, Center for Biomedicine and Medical Technology Mannheim (CBTM), Medical Faculty Mannheim, Ruprecht Karl University of Heidelberg, Ludolf-Krehl-Str. 6, 68135 Mannheim, Germany.
| | - Heike Allgayer
- Department of Experimental Surgery, Center for Biomedicine and Medical Technology Mannheim (CBTM), Medical Faculty Mannheim, Ruprecht Karl University of Heidelberg, Ludolf-Krehl-Str. 6, 68135 Mannheim, Germany.
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Jorquera PA, Anderson L, Tripp RA. Understanding respiratory syncytial virus (RSV) vaccine development and aspects of disease pathogenesis. Expert Rev Vaccines 2015; 15:173-87. [PMID: 26641318 DOI: 10.1586/14760584.2016.1115353] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Respiratory syncytial virus (RSV) is the most important cause of lower respiratory tract infections causing bronchiolitis and some mortality in young children and the elderly. Despite decades of research there is no licensed RSV vaccine. Although significant advances have been made in understanding the immune factors responsible for inducing vaccine-enhanced disease in animal models, less information is available for humans. In this review, we discuss the different types of RSV vaccines and their target population, the need for establishing immune correlates for vaccine efficacy, and how the use of different animal models can help predict vaccine efficacy and clinical outcomes in humans.
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Affiliation(s)
- Patricia A Jorquera
- a Department of Infectious Disease, College of Veterinary Medicine , University of Georgia , Athens , GA , Georgia
| | - Lydia Anderson
- a Department of Infectious Disease, College of Veterinary Medicine , University of Georgia , Athens , GA , Georgia
| | - Ralph A Tripp
- a Department of Infectious Disease, College of Veterinary Medicine , University of Georgia , Athens , GA , Georgia
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165
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Association of Polymorphic Variants of miRNA Processing Genes with Larynx Cancer Risk in a Polish Population. BIOMED RESEARCH INTERNATIONAL 2015; 2015:298378. [PMID: 26688807 PMCID: PMC4673325 DOI: 10.1155/2015/298378] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Revised: 10/02/2015] [Accepted: 10/25/2015] [Indexed: 11/29/2022]
Abstract
Laryngeal cancer (LC) is one of the most prevalent types of head and neck cancer. An increasing interest has been focused on the role of microRNA (miRNAs) in LC development. The study group consisted of 135 larynx cancer patients and 170 cancer-free individuals. Nine polymorphisms of pre-miRNA processing genes, DROSHA (rs6877842), DGCR8 (rs3757, rs417309, and rs1640299), RAN (rs14035), XPO5 (rs11077), DICER1 (rs13078 and rs3742330) and TARBP2 (rs784567), were performed by TaqMan SNP Genotyping Assay. It was found that the frequency of the GT and the TT polymorphic variants of XPO5 gene were higher in LC patients than in controls (p < 0.0001 and p = 0.000183, resp.). In turn, the frequency of the CT genotype of RAN gene was higher in controls than in LC patients (p < 0.0001). The TT and the AG of DICER1 gene (p = 0.034697 for rs13078 and p = 0.0004 for rs3742330) as well as the AG and the GG genotypes of TARBP2 gene (p = 0.008335 and p < 0.0001, resp.) were associated with higher risk of LC occurrence. Our data suggested that polymorphisms of miRNA processing genes might be useful as predictive factors for the LC development.
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166
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MatPred: Computational Identification of Mature MicroRNAs within Novel Pre-MicroRNAs. BIOMED RESEARCH INTERNATIONAL 2015; 2015:546763. [PMID: 26682221 PMCID: PMC4670854 DOI: 10.1155/2015/546763] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Revised: 09/18/2015] [Accepted: 09/28/2015] [Indexed: 12/22/2022]
Abstract
Background. MicroRNAs (miRNAs) are short noncoding RNAs integral for regulating gene expression at the posttranscriptional level. However, experimental methods often fall short in finding miRNAs expressed at low levels or in specific tissues. While several computational methods have been developed for predicting the localization of mature miRNAs within the precursor transcript, the prediction accuracy requires significant improvement. Methodology/Principal Findings. Here, we present MatPred, which predicts mature miRNA candidates within novel pre-miRNA transcripts. In addition to the relative locus of the mature miRNA within the pre-miRNA hairpin loop and minimum free energy, we innovatively integrated features that describe the nucleotide-specific RNA secondary structure characteristics. In total, 94 features were extracted from the mature miRNA loci and flanking regions. The model was trained based on a radial basis function kernel/support vector machine (RBF/SVM). Our method can predict precise locations of mature miRNAs, as affirmed by experimentally verified human pre-miRNAs or pre-miRNAs candidates, thus achieving a significant advantage over existing methods. Conclusions. MatPred is a highly effective method for identifying mature miRNAs within novel pre-miRNA transcripts. Our model significantly outperformed three other widely used existing methods. Such processing prediction methods may provide important insight into miRNA biogenesis.
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167
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Martínez-Fernández M, Paramio JM, Dueñas M. RNA Detection in Urine: From RNA Extraction to Good Normalizer Molecules. J Mol Diagn 2015; 18:15-22. [PMID: 26586227 DOI: 10.1016/j.jmoldx.2015.07.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 07/03/2015] [Accepted: 07/10/2015] [Indexed: 11/24/2022] Open
Abstract
RNA detection in liquid urine biopsy specimens could be an optimal method for noninvasive diagnostic and prognostic procedures in urologic disorders; however, there are no standardized procedures for implementing it in the clinic. We present a systematic evaluation of the best storage conditions and purification methods using four commercially available extraction kits to purify RNA from void urine. We measured different RNA molecules to select good and stable biomarkers and normalizers for analyses in liquid urine biopsy specimens. We have established a new combined procedure for RNA isolation from urine and found good performance in 25 urine samples from healthy volunteers of both sexes. Associations were tested using the t-test for paired samples, and miRNA specimens were selected as the more stable molecules. Stability analysis was performed, and we found miR193a and miR448 as the best normalizers to be used in this biofluid. This is a highly reproducible method that could be used to evaluate urine samples for diagnostic and prognostic purposes.
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Affiliation(s)
- Mónica Martínez-Fernández
- Molecular Oncology Unit, Research Center for Energy, Environment, and Technology [CIEMAT (ed70A)], Madrid; and the Uro-Oncology Unit, University Hospital 12 de Octubre, Madrid, Spain
| | - Jesús M Paramio
- Molecular Oncology Unit, Research Center for Energy, Environment, and Technology [CIEMAT (ed70A)], Madrid; and the Uro-Oncology Unit, University Hospital 12 de Octubre, Madrid, Spain.
| | - Marta Dueñas
- Molecular Oncology Unit, Research Center for Energy, Environment, and Technology [CIEMAT (ed70A)], Madrid; and the Uro-Oncology Unit, University Hospital 12 de Octubre, Madrid, Spain.
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168
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Wang F, Ying H, He B, Pan Y, Sun H, Wang S. Circulating miR-148/152 family as potential biomarkers in hepatocellular carcinoma. Tumour Biol 2015; 37:4945-53. [PMID: 26531720 DOI: 10.1007/s13277-015-4340-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 10/28/2015] [Indexed: 12/21/2022] Open
Abstract
Aberrant expressions of the miR-148/152 family (miR-148a, miR-148b, and miR-152) have been documented in many tumor tissues, including hepatocellular carcinoma (HCC). However, the expression pattern and clinical significance of circulating miR-148/152 family in HCC remain elusive. In this study, we conducted quantitative real-time polymerase chain reaction (qRT-PCR) to examine the levels of serum miR-148a, miR-148b, and miR-152 in 76 HCC cases, as well as 62 controls with benign liver diseases and 55 healthy volunteers. Our results showed that serum levels of three microRNAs (miRNAs) were significantly decreased in HCC cases than those in benign and healthy controls (all P < 0.05). Moreover, they showed strong correlations with each other in HCC group (r = 0.6716, 0.5381, and 0.7712; all P < 0.001). Receiver operating characteristic (ROC) analysis revealed that the combination of circulating miR-148/152 family had an increased area under the curve (AUC) = 0.940 (95 % confidence interval (CI), 0.886-0.973) with the sensitivity of 96.1 % and the specificity of 91.9 %, which were significantly higher than those of serum alpha-fetoprotein (AFP) and three miRNAs alone in differentiating HCC from benign liver diseases. In addition, serum miR-148a and miR-148b were significantly associated with tumor size (P = 0.011 and 0.037) and tumor-node-metastasis (TNM) stage (P < 0.001 and P = 0.034), yet serum miR-152 was only correlated with TNM stage (P = 0.009). Also, dynamic monitoring three miRNAs can help us predict recurrence or metastasis in HCC cases after surgical resection. Besides, Kaplan-Meier analyses demonstrated that the decreased serum miR-148a (P < 0.001) and miR-152 (P = 0.012) was closely correlated with shorten overall survival of HCC patients. Additionally, Cox regression model further indicated that serum miR-148a was strongly associated with the prognosis of HCC patients. Our study suggests that downregulated circulating miR-148/152 family can provide positive diagnostic value for HCC. Moreover, serum miR-148a might be as independent prognostic factor for HCC patients.
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Affiliation(s)
- Feng Wang
- Central Laboratory, Nanjing First Hospital, Nanjing Medical University, Jiangsu, China
| | - Houqun Ying
- Medical College, Southeast University, Jiangsu, China
| | - Bangshun He
- Central Laboratory, Nanjing First Hospital, Nanjing Medical University, Jiangsu, China
| | - Yuqin Pan
- Central Laboratory, Nanjing First Hospital, Nanjing Medical University, Jiangsu, China
| | - Huiling Sun
- Central Laboratory, Nanjing First Hospital, Nanjing Medical University, Jiangsu, China
| | - Shukui Wang
- Central Laboratory, Nanjing First Hospital, Nanjing Medical University, Jiangsu, China.
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169
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Guglielmelli P, Bisognin A, Saccoman C, Mannarelli C, Coppe A, Vannucchi AM, Bortoluzzi S. Small RNA Sequencing Uncovers New miRNAs and moRNAs Differentially Expressed in Normal and Primary Myelofibrosis CD34+ Cells. PLoS One 2015; 10:e0140445. [PMID: 26468945 PMCID: PMC4607157 DOI: 10.1371/journal.pone.0140445] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 09/25/2015] [Indexed: 12/20/2022] Open
Abstract
Myeloproliferative neoplasms (MPN) are chronic myeloid cancers thought to arise at the level of CD34+ hematopoietic stem/progenitor cells. They include essential thrombocythemia (ET), polycythemia vera (PV) and primary myelofibrosis (PMF). All can progress to acute leukemia, but PMF carries the worst prognosis. Increasing evidences indicate that deregulation of microRNAs (miRNAs) might plays an important role in hematologic malignancies, including MPN. To attain deeper knowledge of short RNAs (sRNAs) expression pattern in CD34+ cells and of their possible role in mediating post-transcriptional regulation in PMF, we sequenced with Illumina HiSeq2000 technology CD34+ cells from healthy subjects and PMF patients. We detected the expression of 784 known miRNAs, with a prevalence of miRNA up-regulation in PMF samples, and discovered 34 new miRNAs and 99 new miRNA-offset RNAs (moRNAs), in CD34+ cells. Thirty-seven small RNAs were differentially expressed in PMF patients compared with healthy subjects, according to microRNA sequencing data. Five miRNAs (miR-10b-5p, miR-19b-3p, miR-29a-3p, miR-379-5p, and miR-543) were deregulated also in PMF granulocytes. Moreover, 3’-moR-128-2 resulted consistently downregulated in PMF according to RNA-seq and qRT-PCR data both in CD34+ cells and granulocytes. Target predictions of these validated small RNAs de-regulated in PMF and functional enrichment analyses highlighted many interesting pathways involved in tumor development and progression, such as signaling by FGFR and DAP12 and Oncogene Induced Senescence. As a whole, data obtained in this study deepened the knowledge of miRNAs and moRNAs altered expression in PMF CD34+ cells and allowed to identify and validate a specific small RNA profile that distinguishes PMF granulocytes from those of normal subjects. We thus provided new information regarding the possible role of miRNAs and, specifically, of new moRNAs in this disease.
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Affiliation(s)
- Paola Guglielmelli
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Andrea Bisognin
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | | | - Carmela Mannarelli
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Alessandro Coppe
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | | | - Stefania Bortoluzzi
- Department of Molecular Medicine, University of Padova, Padova, Italy
- * E-mail:
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Abstract
Cyclin D1 binds and activates cyclin-dependent kinases 4/6 (Cdk4/6) to phosphorylate the retinoblastoma (RB) family proteins, relieving E2F/DPs from the negative restraint of RB proteins and histone deacetylases. The cyclin D-Cdk4/6 complexes activate cyclin E/Cdk2 through titration of the Cdk inhibitors p21Cip1/p27Kip1. Cyclin E/Cdk2 further phosphorylates RBs, thereby activating E2F/DPs, and cells enter the S phase of the cell cycle. Cyclin D-Cdk4/6 also phosphorylates MEP50 subunit of the protein arginine methyltransferase 5 (PRMT5), which cooperates with cyclin D1 to drive lymphomagenesis in vivo. Activated PRMPT5 causes arginine methylation of p53 to suppress expression of pro-apoptotic and anti-proliferative target genes, explaining the molecular mechanism for tumorigenesis. Cyclin D1 physically interacts with transcription factors such as estrogen receptor, androgen receptor, and Myb family proteins to regulate gene expression in Cdk-independent fashion. Dmp1 is a Myb-like protein that quenches the oncogenic signals from activated Ras or HER2 by inducing Arf/p53-dependent cell cycle arrest. Cyclin D1 binds to Dmp1α to activate both Arf and Ink4a promoters to induce cell cycle arrest or apoptosis in non-transformed cells to prevent them from neoplastic transformation. Dmp1-deficiency significantly accelerates mouse mammary tumorigenesis with reduced apoptosis and increased metastasis. Cyclin D1 interferes with ligand activation of PPARγ involved in cellular differentiation; it also physically interacts with histone deacetylases (HDACs) and p300 to repress gene expression. It has also been shown that cyclin D1 accelerates tumorigenesis through transcriptional activation of miR-17/20 and Dicer1 which, in turn, represses cyclin D1 expression. Identification of cyclin D1-binding proteins/promoters will be essential for further clarification of its biological activities.
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Affiliation(s)
- Kazushi Inoue
- Department of Pathology, Wake Forest University Health Sciences, Medical Center Boulevard, Winston-Salem, NC 27157 USA
| | - Elizabeth A Fry
- Department of Pathology, Wake Forest University Health Sciences, Medical Center Boulevard, Winston-Salem, NC 27157 USA
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MicroRNAs in clear cell renal cell carcinoma: biological functions and applications. J Kidney Cancer VHL 2015; 2:140-152. [PMID: 28326269 PMCID: PMC5345517 DOI: 10.15586/jkcvhl.2015.40] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 08/18/2015] [Indexed: 12/14/2022] Open
Abstract
MicroRNAs (miRs) are small noncoding RNAs that govern many biological processes. They frequently acquire a gain or a loss of function in cancer and hence play a causative role in the development and progression of neoplasms. They could be used as biomarkers to improve our knowledge on diagnosis, prognosis and drug resistance, and to attempt therapeutic approaches in several types of cancer including clear cell renal cell carcinoma (ccRCC). ccRCC is the most predominant subtype of RCC that accounts for about 90% of all renal cancers. Since ccRCC is generally asymptomatic until very late, it is difficult to diagnose early. Moreover, in the absence of preventive treatments for metastatic ccRCC after surgical resection of the primary cancer, predictive prognostic biomarkers are needed in order to achieve appropriate therapies. Herein the role of miRs in the biology of ccRCC and the potential applications of these molecules are discussed. Moreover, future applications in the diagnostic and prognostic field, as well as their impact on drug response and therapeutic targets are also explored. Their use in clinical practice as molecular biomarkers alone, or in combination with other biological markers could accelerate progress, help design personalized therapies, limit side effects, and improve quality of life of ccRCC patients.
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172
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Fang B, Zhu J, Wang Y, Geng F, Li G. MiR-454 inhibited cell proliferation of human glioblastoma cells by suppressing PDK1 expression. Biomed Pharmacother 2015; 75:148-52. [PMID: 26297548 DOI: 10.1016/j.biopha.2015.07.029] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Accepted: 07/26/2015] [Indexed: 10/23/2022] Open
Abstract
It has been well documented that aberrant expression of microRNAs is associated with carcinogenesis of glioblastoma (GBM), however the underlying mechanisms are not clear. In this present study, we aimed to clarify the biological function of miR-454 in GBM. MiR-454 was identified to be significantly down-regulated in GBM primary tumors and cell lines. Overexpression of miR-454 in GBM cells resulted in arresting cells at G0/G1 phase and thus inhibiting cell proliferation. Bioinformatic analysis predicted 3-phosphoinositide-dependent protein kinase-1 (PDK1) as a target of miR-454 which acted as a tumor promoter gene. Increased miR-454 significantly repressed PDK1 expression, and then regulating cell proliferation and cell cycle regulators, down-regulation of Cyclin D1 and p-pRb and p21 was up-regulated. Taken together, our study has revealed miR-454 as a tumor suppressor in GBM.
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Affiliation(s)
- Baojun Fang
- Department of Neurosurgery, Qilu Hospital of Shandong University, Jinan, 250012 Shandong, PR China; Department of Neurosurgery, Liaocheng People's Hospital, Liaocheng 252000, Shandong, PR China
| | - Jianxin Zhu
- Department of Neurosurgery, Qilu Hospital of Shandong University, Jinan, 250012 Shandong, PR China; Department of Neurosurgery, Liaocheng People's Hospital, Liaocheng 252000, Shandong, PR China
| | - Yunhua Wang
- Department of Neurosurgery, Liaocheng People's Hospital, Liaocheng 252000, Shandong, PR China
| | - Fengyang Geng
- Department of Neurosurgery, Liaocheng People's Hospital, Liaocheng 252000, Shandong, PR China
| | - Gang Li
- Department of Neurosurgery, Qilu Hospital of Shandong University, Jinan, 250012 Shandong, PR China.
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173
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Zhu D, Chen H, Yang X, Chen W, Wang L, Xu J, Yu L. miR-32 functions as a tumor suppressor and directly targets SOX9 in human non-small cell lung cancer. Onco Targets Ther 2015; 8:1773-83. [PMID: 26229485 PMCID: PMC4516199 DOI: 10.2147/ott.s72457] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Purpose MicroRNA-32 (miR-32) is dysregulated in certain human malignancies and correlates with tumor progression. However, its expression and function in non-small cell lung cancer (NSCLC) remain unclear. Thus, the aim of this study was to explore the effects of miR-32 expression on NSCLC tumorigenesis and development. Methods Using real-time quantitative reverse-transcription polymerase chain reaction (qRT-PCR), we detected miR-32 expression in NSCLC cell lines and primary tumor tissues. The association of miR-32 expression with clinicopathological factors and prognosis was also analyzed. Then, the effects of miR-32 expression on the biological behavior of NSCLC cells were investigated. Finally, the potential regulatory effect of miR-32 on SOX9 expression was confirmed. Results miR-32 expression levels were significantly downregulated in NSCLC compared with the corresponding noncancerous lung tissues (P<0.001). In addition, decreased miR-32 expression was significantly associated with lymph node metastasis (P=0.002), advanced tumor/nodes/metastasis (TNM) classification stages (P<0.001), and shorter overall survival (P<0.001). Multivariate regression analysis corroborated that downregulated miR-32 expression was an independent unfavorable prognostic factor for NSCLC patients. In vitro studies demonstrated that miR-32 overexpression reduced A549 cell proliferation, migration, and invasion, and promoted apoptosis. Furthermore, SOX9 was confirmed as a direct target of miR-32, using a luciferase reporter assay. Conclusion These findings indicate that miR-32 may act as a tumor suppressor in NSCLC and could serve as a novel therapeutic agent for miR-based therapy.
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Affiliation(s)
- Dan Zhu
- Department of Respiratory Medicine, Jinhua Municipal Central Hospital, Jinhua, People's Republic of China
| | - Hui Chen
- Department of Respiratory Medicine, Jinhua Municipal Central Hospital, Jinhua, People's Republic of China
| | - Xiguang Yang
- Department of Respiratory Medicine, Jinhua Municipal Central Hospital, Jinhua, People's Republic of China
| | - Weisong Chen
- Department of Respiratory Medicine, Jinhua Municipal Central Hospital, Jinhua, People's Republic of China
| | - Linying Wang
- Department of Respiratory Medicine, Jinhua Municipal Central Hospital, Jinhua, People's Republic of China
| | - Jilin Xu
- Department of Respiratory Medicine, Jinhua Municipal Central Hospital, Jinhua, People's Republic of China
| | - Long Yu
- Department of Respiratory Medicine, Jinhua Municipal Central Hospital, Jinhua, People's Republic of China
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Ciccacci C, Rufini S, Politi C, Novelli G, Forte V, Borgiani P. Could MicroRNA polymorphisms influence warfarin dosing? A pharmacogenetics study on mir133 genes. Thromb Res 2015; 136:367-70. [PMID: 26113018 DOI: 10.1016/j.thromres.2015.06.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 06/11/2015] [Accepted: 06/17/2015] [Indexed: 01/08/2023]
Abstract
MicroRNAs are small single stranded molecules that play a crucial role in regulation of physiological and pathological processes. Recent studies showed that VKORC1 gene contains an highly evolutionary conserved binding site for mir-133. Moreover, in human hepatocytes mir-133 is constitutively co-expressed with VKORC1. Since VKORC1 protein is the target of warfarin treatment, the aim of this study was to verify if genetic variations in MIR133A1, MIR133A2 and MIR133B could contribute to warfarin dose variability. By direct sequencing, we identified 4 SNPs in MIR133A2 gene and 1 SNP in MIR133B gene. Three SNPs in MIR133A2 were in complete linkage disequilibrium and correlated with warfarin dose: indeed, for each SNP, patients carrying the GA or AA genotype required a MWWD significantly higher than the wildtype genotype (P=0.019). We also inferred the haplotypes in MIR133A2 gene. The GC haplotype required a MWWD significantly lower than AT haplotype (P=0.012). The multiple linear regression analysis confirmed that rs45547937 (as tag SNP) in MIR133A2 could be involved in warfarin dosing variability, (P=0.016). These results seem to suggest that also polymorphisms in miRNA precursors may potentially affects drug response variability.
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Affiliation(s)
- Cinzia Ciccacci
- Department of Biomedicine and Prevention, Genetics Unit, University of Rome "Tor Vergata", Italy.
| | - Sara Rufini
- Department of Biomedicine and Prevention, Genetics Unit, University of Rome "Tor Vergata", Italy
| | - Cristina Politi
- Department of Biomedicine and Prevention, Genetics Unit, University of Rome "Tor Vergata", Italy
| | - Giuseppe Novelli
- Department of Biomedicine and Prevention, Genetics Unit, University of Rome "Tor Vergata", Italy
| | - Vittorio Forte
- Center of Haemostasis and Thrombosis, Policlinico Tor Vergata, Rome, Italy
| | - Paola Borgiani
- Department of Biomedicine and Prevention, Genetics Unit, University of Rome "Tor Vergata", Italy
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175
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Xiang X, Mei H, Qu H, Zhao X, Li D, Song H, Jiao W, Pu J, Huang K, Zheng L, Tong Q. miRNA-584-5p exerts tumor suppressive functions in human neuroblastoma through repressing transcription of matrix metalloproteinase 14. Biochim Biophys Acta Mol Basis Dis 2015; 1852:1743-54. [PMID: 26047679 DOI: 10.1016/j.bbadis.2015.06.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 05/15/2015] [Accepted: 06/01/2015] [Indexed: 01/23/2023]
Abstract
Matrix metalloproteinase 14 (MMP-14) is a membrane-anchored MMP crucial for tumorigenesis and aggressiveness, and is highly expressed in neuroblastoma (NB), the most common extracranial solid tumor in childhood. Recent evidence shows the emerging roles of endogenous promoter-targeting microRNAs (miRNAs) in regulating gene transcription. However, the roles of miRNAs in the transcription of MMP-14 still remain largely unknown. In this study, through mining computational algorithm program and Argonaute-chromosome interaction dataset, we identified one binding site of miRNA-584-5p (miR-584-5p) within the MMP-14 promoter. In NB tissues, miR-584-5p was under-expressed and inversely correlated with MMP-14 expression, and was an independent prognostic factor for favorable outcome of patients. miR-584-5p precursor attenuated the expression of MMP-14 in a Dicer-dependent manner, resulting in decreased levels of vascular endothelial growth factor, in cultured NB cell lines. In addition, miR-584-5p suppressed the promoter activity of MMP-14, and mutation of miR-584-5p binding site abolished these effects. Mechanistically, miR-584-5p recruited Argonaute 2 to facilitate the enrichment of enhancer of zeste homolog 2, histone H3 lysine 27 trimethylation, and histone H3 lysine 9 dimethylation on MMP-14 promoter in NB cells, which was abolished by repressing the miR-584-5p-promoter interaction. Gain- and loss-of-function studies demonstrated that miR-584-5p suppressed the growth, invasion, metastasis, and angiogenesis of NB cells in vitro and in vivo. Moreover, restoration of MMP-14 expression rescued the NB cells from changes in these biological features. Taken together, these results indicate that promoter-targeting miR-584-5p exerts tumor suppressive functions in NB through repressing the transcription of MMP-14.
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Affiliation(s)
- Xuan Xiang
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China
| | - Hong Mei
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China
| | - Hongxia Qu
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China
| | - Xiang Zhao
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China
| | - Dan Li
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China
| | - Huajie Song
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China
| | - Wanju Jiao
- Department of Pathology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China
| | - Jiarui Pu
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China
| | - Kai Huang
- Clinical Center of Human Genomic Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China; Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China
| | - Liduan Zheng
- Department of Pathology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China; Clinical Center of Human Genomic Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China.
| | - Qiangsong Tong
- Department of Pediatric Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China; Clinical Center of Human Genomic Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, PR China.
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176
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Krakowsky RHE, Tollefsbol TO. Impact of Nutrition on Non-Coding RNA Epigenetics in Breast and Gynecological Cancer. Front Nutr 2015; 2:16. [PMID: 26075205 PMCID: PMC4445322 DOI: 10.3389/fnut.2015.00016] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Accepted: 05/02/2015] [Indexed: 12/21/2022] Open
Abstract
Cancer is the second leading cause of death in females. According to the American Cancer Society, there are 327,660 new cases in breast and gynecological cancers estimated in 2014, placing emphasis on the need for cancer prevention and new cancer treatment strategies. One important approach to cancer prevention involves phytochemicals, biologically active compounds derived from plants. A variety of studies on the impact of dietary compounds found in cruciferous vegetables, green tea, and spices like curry and black pepper have revealed epigenetic changes in female cancers. Thus, an important emerging topic comprises epigenetic changes due to the modulation of non-coding RNA levels. Since it has been shown that non-coding RNAs such as microRNAs and long non-coding RNAs are aberrantly expressed in cancer, and furthermore are linked to distinct cancer phenotypes, understanding the effects of dietary compounds and supplements on the epigenetic modulator non-coding RNA is of great interest. This article reviews the current findings on nutrition-induced changes in breast and gynecological cancers at the non-coding RNA level.
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Affiliation(s)
- Rosanna H E Krakowsky
- Department of Biology, University of Alabama at Birmingham , Birmingham, AL , USA ; Department of Biochemistry, University of Leipzig , Leipzig , Germany
| | - Trygve O Tollefsbol
- Department of Biology, University of Alabama at Birmingham , Birmingham, AL , USA ; Comprehensive Center for Healthy Ageing, University of Alabama at Birmingham , Birmingham, AL , USA ; Comprehensive Cancer Center, University of Alabama at Birmingham , Birmingham, AL , USA ; Nutrition Obesity Research Center, University of Alabama at Birmingham , Birmingham, AL , USA ; Comprehensive Diabetes Center, University of Alabama at Birmingham , Birmingham, AL , USA
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177
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Zhang S, Zhang H, Zhu J, Zhang X, Liu Y. MiR-522 contributes to cell proliferation of human glioblastoma cells by suppressing PHLPP1 expression. Biomed Pharmacother 2015; 70:164-9. [DOI: 10.1016/j.biopha.2015.01.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2014] [Accepted: 01/04/2015] [Indexed: 02/07/2023] Open
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178
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Zhang Z, Sun J, Bai Z, Li H, He S, Chen R, Che X. MicroRNA-153 acts as a prognostic marker in gastric cancer and its role in cell migration and invasion. Onco Targets Ther 2015; 8:357-64. [PMID: 25678802 PMCID: PMC4322869 DOI: 10.2147/ott.s78236] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
MicroRNA (miRNA)-153 (miR-153) has been considered as a novel tumor-related miRNA and is found to be significantly deregulated in human cancers. In this study, we found that the expression levels of miR-153 were obviously lower in gastric cancer tissues than those in matched adjacent nontumor tissues. Otherwise, miR-153 was expressed at significantly lower levels in aggressive tumor tissues. Clinical association analysis indicated that low expression of miR-153 was prominently correlated with poor prognostic features in gastric cancer. Furthermore, we demonstrated that the low expression of miR-153 was correlated with short 5-year survival of gastric cancer patients. Multivariate Cox regression analysis indicated that miR-153 was an independent prognostic marker in gastric cancer. Our in vitro studies showed that upregulation of miR-153 reduced cell migration and invasion in MKN-45 cells. Meanwhile, downregulation of miR-153 promoted SGC-7901 cell migration and invasion. An inverse correlation between miR-153 and SNAI1 expression was observed in gastric cancer tissues. In addition, upregulation of miR-153 reduced SNAI1 expression and subsequently suppressed epithelial–mesenchymal transition (EMT) with elevated expression of E-cadherin and reduced expression of vimentin in MKN-45 cells. Furthermore, downregulation of miR-153 increased SNAI1 expression and promoted EMT in SGC-7901 cells. In conclusion, miR-153 is an independent prognostic marker for predicting survival of gastric cancer patients and may promote gastric cancer cell migration and invasion, by inhibiting SNAI1-induced EMT.
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Affiliation(s)
- Zhengliang Zhang
- Department of Emergency, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - Jiangli Sun
- Department of Emergency, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - Zhenghai Bai
- Department of Emergency, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - Haijun Li
- Department of General Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - Shicai He
- Department of General Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - Rui Chen
- Department of General Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - Xiangming Che
- Department of General Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
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