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Gao F, Chen X, Xu B, Luo Z, Liang Y, Fang S, Li M, Wang X, Lin X. Inhibition of MicroRNA-92 alleviates atherogenesis by regulation of macrophage polarization through targeting KLF4. J Cardiol 2021; 79:432-438. [PMID: 34750028 DOI: 10.1016/j.jjcc.2021.10.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 10/06/2021] [Accepted: 10/07/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND Atherosclerosis is a chronic inflammatory disease in which macrophage polarization plays an important role in contribution to atherosclerotic plaque formation and stability. Here we tested the effect of miR-92 regulation on the development of atherosclerosis beyond tumorigenesis and explored the potential mechanism. METHODS AND RESULTS In the present study, bone marrow derived macrophages (BMDMs), mouse peritoneal macrophages (MPMs), and human macrophages were used to test the expression of miR-92. Here we noticed miR-92 levels were enhanced in classic M1 macrophage but decreased in alternative M2 macrophage, respectively. In vitro, we demonstrated that macrophages transfected with miR-92 inhibitor attenuated proinflammatory cytokine secretion represented by polarized M1 markers but promoted anti-inflammatory state that was indicative of an M2 phenotype. Mechanistically, miR-92 was found to directly interact with KLF4 and we further identified a requirement role of KLF4 in mediating the effect of miR-92 silencing macrophage polarization. Concomitantly, miR-92 inhibition treated ApoE-/- mice promoted macrophage polarization toward alternative M2 macrophage, thus protecting against atherosclerotic plaque formation and preventing a vulnerable phenotype. CONCLUSION miR-92 inhibition promoted alternative macrophage activation and attenuated atherosclerosis regression partially regulated in a KLF4-dependent manner, which indicated that miR-92/KLF4 axis may serve as a promising strategy for prevention of atherosclerotic diseases.
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Affiliation(s)
- Feng Gao
- Department of Cardiology, Second Affiliated Hospital of Anhui Medical University, No.678 Furong Road, Economic Development District, Hefei 230601, Anhui Province, China
| | - Xueying Chen
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Banglong Xu
- Department of Cardiology, Second Affiliated Hospital of Anhui Medical University, No.678 Furong Road, Economic Development District, Hefei 230601, Anhui Province, China
| | - Zhidan Luo
- Department of Geriatrics, Chongqing People's Hospital, Chongqing, China
| | - Yi Liang
- Houston Methodist Research Institute, Center for Cardiovascular Regeneration, Houston, TX, USA
| | - Sihua Fang
- Department of Cardiology, Second Affiliated Hospital of Anhui Medical University, No.678 Furong Road, Economic Development District, Hefei 230601, Anhui Province, China
| | - Mengli Li
- Department of Cardiology, Second Affiliated Hospital of Anhui Medical University, No.678 Furong Road, Economic Development District, Hefei 230601, Anhui Province, China
| | - Xiaochen Wang
- Department of Cardiology, Second Affiliated Hospital of Anhui Medical University, No.678 Furong Road, Economic Development District, Hefei 230601, Anhui Province, China.
| | - Xianhe Lin
- Department of Cardiology, The First Affiliated Hospital of Anhui Medical University, No.218 Jixi Road, Shushan District, Hefei city 230601, Anhui Province, China.
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Huang X, Wang B, Chen R, Zhong S, Gao F, Zhang Y, Niu Y, Li C, Shi G. The Nuclear Farnesoid X Receptor Reduces p53 Ubiquitination and Inhibits Cervical Cancer Cell Proliferation. Front Cell Dev Biol 2021; 9:583146. [PMID: 33889569 PMCID: PMC8056046 DOI: 10.3389/fcell.2021.583146] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 03/10/2021] [Indexed: 02/05/2023] Open
Abstract
The role of farnesoid X receptor (FXR) in cervical cancer and the underlying molecular mechanism remain largely unknown. Therefore, this study aimed to assess the mechanism of FXR in cervical cancer. Western blot, qRT-PCR, and immunohistochemistry demonstrated that FXR was significantly reduced in squamous cell carcinoma tissues, although there were no associations of metastasis and TNM stage with FXR. In Lenti-FXR cells obtained by lentiviral transfection, the overexpression of FXR reduced cell viability and colony formation. Compared with the Lenti-Vector groups, the overexpression of FXR induced early and late apoptosis and promoted G1 arrest. With time, early apoptosis decreased, and late apoptosis increased. In tumor xenograft experiments, overexpression of FXR upregulated small heterodimer partner (SHP), murine double minute-2 (MDM2), and p53 in the nucleus. Co-immunoprecipitation (Co-IP) showed that SHP directly interacted with MDM2, which is important to protect p53 from ubiquitination. Nutlin3a increased MDM2 and p53 amounts in the Lenti-Vector groups, without effects in the Lenti-FXR groups. Silencing SHP reduced MDM2 and p53 levels in the Lenti-FXR groups, and Nutlin3a counteracted these effects. Taken together, these findings suggest that FXR inhibits cervical cancer via upregulation of SHP, MDM2, and p53.
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Affiliation(s)
- Xiaohua Huang
- Department of Pediatrics, Second Affiliated Hospital of Shantou University Medical College, Shantou, China
| | - Bin Wang
- Department of Pharmacology, Shantou University Medical College, Shantou, China
| | - Runji Chen
- Department of Pharmacology, Shantou University Medical College, Shantou, China
| | - Shuping Zhong
- Department of Biochemistry and Molecular Biology, University of Southern California, Los Angeles, Los Angeles, CA, United States
| | - Fenfei Gao
- Department of Pharmacology, Shantou University Medical College, Shantou, China
| | - Yanmei Zhang
- Department of Pharmacology, Shantou University Medical College, Shantou, China
| | - Yongdong Niu
- Department of Pharmacology, Shantou University Medical College, Shantou, China
| | - Congzhu Li
- Department of Gynecology, Cancer Hospital, Shantou University Medical College, Shantou, China
| | - Ganggang Shi
- Department of Pharmacology, Shantou University Medical College, Shantou, China
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Hegyi P, Maléth J, Walters JR, Hofmann AF, Keely SJ. Guts and Gall: Bile Acids in Regulation of Intestinal Epithelial Function in Health and Disease. Physiol Rev 2019; 98:1983-2023. [PMID: 30067158 DOI: 10.1152/physrev.00054.2017] [Citation(s) in RCA: 164] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Epithelial cells line the entire surface of the gastrointestinal tract and its accessory organs where they primarily function in transporting digestive enzymes, nutrients, electrolytes, and fluid to and from the luminal contents. At the same time, epithelial cells are responsible for forming a physical and biochemical barrier that prevents the entry into the body of harmful agents, such as bacteria and their toxins. Dysregulation of epithelial transport and barrier function is associated with the pathogenesis of a number of conditions throughout the intestine, such as inflammatory bowel disease, chronic diarrhea, pancreatitis, reflux esophagitis, and cancer. Driven by discovery of specific receptors on intestinal epithelial cells, new insights into mechanisms that control their synthesis and enterohepatic circulation, and a growing appreciation of their roles as bioactive bacterial metabolites, bile acids are currently receiving a great deal of interest as critical regulators of epithelial function in health and disease. This review aims to summarize recent advances in this field and to highlight how bile acids are now emerging as exciting new targets for disease intervention.
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Affiliation(s)
- Peter Hegyi
- Momentum Translational Gastroenterology Research Group, Hungarian Academy of Sciences-University of Szeged , Szeged , Hungary ; Institute for Translational Medicine, Medical School, University of Pécs , Pécs , Hungary ; Momentum Epithelial Cell Signalling and Secretion Research Group and First Department of Medicine, University of Szeged , Szeged , Hungary ; Division of Digestive Diseases, Department of Gastroenterology, Hammersmith Hospital, Imperial College London , London , United Kingdom ; Division of Gastroenterology, Department of Medicine, University of California, San Diego, La Jolla, California ; and Department of Molecular Medicine, Royal College of Surgeons in Ireland, Education and Research Centre, Beaumont Hospital , Dublin , Ireland
| | - Joszef Maléth
- Momentum Translational Gastroenterology Research Group, Hungarian Academy of Sciences-University of Szeged , Szeged , Hungary ; Institute for Translational Medicine, Medical School, University of Pécs , Pécs , Hungary ; Momentum Epithelial Cell Signalling and Secretion Research Group and First Department of Medicine, University of Szeged , Szeged , Hungary ; Division of Digestive Diseases, Department of Gastroenterology, Hammersmith Hospital, Imperial College London , London , United Kingdom ; Division of Gastroenterology, Department of Medicine, University of California, San Diego, La Jolla, California ; and Department of Molecular Medicine, Royal College of Surgeons in Ireland, Education and Research Centre, Beaumont Hospital , Dublin , Ireland
| | - Julian R Walters
- Momentum Translational Gastroenterology Research Group, Hungarian Academy of Sciences-University of Szeged , Szeged , Hungary ; Institute for Translational Medicine, Medical School, University of Pécs , Pécs , Hungary ; Momentum Epithelial Cell Signalling and Secretion Research Group and First Department of Medicine, University of Szeged , Szeged , Hungary ; Division of Digestive Diseases, Department of Gastroenterology, Hammersmith Hospital, Imperial College London , London , United Kingdom ; Division of Gastroenterology, Department of Medicine, University of California, San Diego, La Jolla, California ; and Department of Molecular Medicine, Royal College of Surgeons in Ireland, Education and Research Centre, Beaumont Hospital , Dublin , Ireland
| | - Alan F Hofmann
- Momentum Translational Gastroenterology Research Group, Hungarian Academy of Sciences-University of Szeged , Szeged , Hungary ; Institute for Translational Medicine, Medical School, University of Pécs , Pécs , Hungary ; Momentum Epithelial Cell Signalling and Secretion Research Group and First Department of Medicine, University of Szeged , Szeged , Hungary ; Division of Digestive Diseases, Department of Gastroenterology, Hammersmith Hospital, Imperial College London , London , United Kingdom ; Division of Gastroenterology, Department of Medicine, University of California, San Diego, La Jolla, California ; and Department of Molecular Medicine, Royal College of Surgeons in Ireland, Education and Research Centre, Beaumont Hospital , Dublin , Ireland
| | - Stephen J Keely
- Momentum Translational Gastroenterology Research Group, Hungarian Academy of Sciences-University of Szeged , Szeged , Hungary ; Institute for Translational Medicine, Medical School, University of Pécs , Pécs , Hungary ; Momentum Epithelial Cell Signalling and Secretion Research Group and First Department of Medicine, University of Szeged , Szeged , Hungary ; Division of Digestive Diseases, Department of Gastroenterology, Hammersmith Hospital, Imperial College London , London , United Kingdom ; Division of Gastroenterology, Department of Medicine, University of California, San Diego, La Jolla, California ; and Department of Molecular Medicine, Royal College of Surgeons in Ireland, Education and Research Centre, Beaumont Hospital , Dublin , Ireland
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MiR-92a Inhibits the Progress of Osteosarcoma Cells and Increases the Cisplatin Sensitivity by Targeting Notch1. BIOMED RESEARCH INTERNATIONAL 2018; 2018:9870693. [PMID: 29984257 PMCID: PMC6011149 DOI: 10.1155/2018/9870693] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Accepted: 02/20/2018] [Indexed: 12/17/2022]
Abstract
Background MicroRNAs (miRs) have been implicated in the development and progression of osteosarcoma. Here, we aimed to illustrate the important role of miR-92a on the regulation of OS development which may help to establish a novel strategy for OS diagnosis and treatment. Materials and Methods Cell viability was measured by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Cell cycle and apoptosis were assessed by flow cytometry with PI and PI/Annexin-V stain, respectively. The expression of proteins was examined by western blot. qPCR was used to detect the expression of RNA. Cell migration was assayed with transwell assay. Results MiR-92a inhibited the proliferation and the migration of OS in vitro and reduced the volume of the tumour in vivo. Further, miR-92a enhanced cisplatin sensitivity of OS. MiR-92a directly targeted Notch1. Conclusion Together, our results indicate that miR-92a inhibited cell growth, migration, and enhanced cisplatin sensitivity of OS cell by targeting Notch1.
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Zhou H, Ni Z, Li T, Su L, Zhang L, Liu N, Shi Y. Activation of FXR promotes intestinal metaplasia of gastric cells via SHP-dependent upregulation of the expression of CDX2. Oncol Lett 2018; 15:7617-7624. [PMID: 29849798 PMCID: PMC5962842 DOI: 10.3892/ol.2018.8342] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 01/29/2018] [Indexed: 01/02/2023] Open
Abstract
Gastric intestinal metaplasia (IM) induced by bile acid is a precancerous lesion of gastric adenocarcinoma and is associated with the expression of caudal-related homeobox 2 (CDX2). In the present study, the role of farnesoid X receptor (FXR) on the regulation of CDX2 in gastric cells was investigated and the underlying molecular mechanisms were examined. Human gastric cell lines were treated with chenodeoxycholic acid (CDCA) or FXR agonist GW4064. Cells were treated with CDCA in the presence or absence of the FXR antagonist or FXR siRNA transfection. Next, cells were treated with CDCA in the presence or absence of SHP siRNA transfection and FXR, CDX2 and SHP mRNA and protein levels were determined by reverse transcription-quantitative polymerase chain reaction and western blot analysis. A chromatin immunoprecipitation assay was performed to examine the relationship between FXR and SHP and the expressions of FXR and CDX2 in gastritis and IM tissues were detected using immunohistochemistry. The results revealed that CDCA was able to induce CDX2 expression, which could be blocked by inhibition or knockdown of FXR. Mechanistically, FXR directly induced the expression of small heterodimer partner (SHP). SHP knockdown significantly decreased CDCA-induced CDX2 expression. ChIP results indicated that FXR could directly bind SHP promoter and promote SHP expression. Finally, immunohistochemistry results demonstrated that the expression levels of CDX2 and FXR in human IM lesions were significantly higher, compared with those in gastritis lesions, and were positively correlated. Collectively, these results revealed that the activation of FXR and sequential direct transcriptional induction of SHP were involved in the expression of CDX2 induced by bile acid in gastric IM lesions.
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Affiliation(s)
- Haining Zhou
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China.,Department of Gastroenterology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Zhen Ni
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Ting Li
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Linna Su
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Lianfeng Zhang
- Department of Gastroenterology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Na Liu
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Yongquan Shi
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
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Di Ciaula A, Wang DQH, Molina-Molina E, Lunardi Baccetto R, Calamita G, Palmieri VO, Portincasa P. Bile Acids and Cancer: Direct and Environmental-Dependent Effects. Ann Hepatol 2017; 16:s87-s105. [PMID: 29080344 DOI: 10.5604/01.3001.0010.5501] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 09/06/2017] [Indexed: 02/05/2023]
Abstract
Bile acids (BAs) regulate the absorption of fat-soluble vitamins, cholesterol and lipids but have also a key role as singalling molecules and in the modulation of epithelial cell proliferation, gene expression and metabolism. These homeostatic pathways, when disrupted, are able to promote local inflammation, systemic metabolic disorders and, ultimately, cancer. The effect of hydrophobic BAs, in particular, can be linked with cancer in several digestive (mainly oesophagus, stomach, liver, pancreas, biliary tract, colon) and extra-digestive organs (i.e. prostate, breast) through a complex series of mechanisms including direct oxidative stress with DNA damage, apoptosis, epigenetic factors regulating gene expression, reduced/increased expression of nuclear receptors (mainly farnesoid X receptor, FXR) and altered composition of gut microbiota, also acting as a common interface between environmental factors (including diet, lifestyle, exposure to toxics) and the molecular events promoting cancerogenesis. Primary prevention strategies (i.e. changes in dietary habits and lifestyle, reduced exposure to environmental toxics) mainly able to modulate gut microbiota and the epigenome, and the therapeutic use of hydrophilic BAs to counterbalance the negative effects of the more hydrophobic BAs might be, in the near future, part of useful tools for cancer prevention and management.
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Affiliation(s)
| | - David Q-H Wang
- Department of Medicine, Division of Gastroenterology and Liver Diseases, Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Emilio Molina-Molina
- Clinica Medica "A. Murri", Department of Biomedical Sciences & Human Oncology, University of Bari Medical School, Bari, Italy
| | - Raquel Lunardi Baccetto
- Clinica Medica "A. Murri", Department of Biomedical Sciences & Human Oncology, University of Bari Medical School, Bari, Italy
| | - Giuseppe Calamita
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari. Italy
| | - Vincenzo O Palmieri
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari. Italy
| | - Piero Portincasa
- Clinica Medica "A. Murri", Department of Biomedical Sciences & Human Oncology, University of Bari Medical School, Bari, Italy
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Wu D, Cao G, Huang Z, Jin K, Hu H, Yu J, Zeng Y. Decreased miR-503 expression in gastric cancer is inversely correlated with serum carcinoembryonic antigen and acts as a potential prognostic and diagnostic biomarker. Onco Targets Ther 2016; 10:129-135. [PMID: 28096682 PMCID: PMC5207439 DOI: 10.2147/ott.s114303] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background Altered expression of miR-503 has been linked to human carcinogenesis. In this present study, we aimed to detect the potential for miR-503 as a novel biomarker for gastric cancer (GC) patients. Materials and methods The relative mRNA level of miR-503 in serum and tissue of 68 GC patients and serum of 32 healthy volunteers was determined by real-time reverse transcription quantitative polymerase chain reaction. Results The miR-503 level was significantly lower in the tissue and serum of GC than their counterparts (all P<0.01). Downregulation of miR-503 was found to be corrected with more aggressive tumor. Patients in the high-miR-503 group showed significantly better overall survival compared to the low-miR-503 group (P=0.021). The serum miR-503 level in GC was inversely correlated with carcinoembryonic antigen (CEA) (r=−0.624, P<0.001). Furthermore, the area under the receiver operating characteristic curve for miR-503 discriminating GC patients from healthy individuals was 0.889 (P=0.006), with a sensitivity of 96.8% and a specificity of 79.4%, higher than that of CEA (area under the receiver operating characteristic curve =0.681, P=0.048). Conclusion The present study suggests that the expression level of miR-503 may serve as prognostic and diagnostic biomarker for GC.
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Affiliation(s)
- Daoyi Wu
- Department of Gastrointestinal Surgery, The Third Affiliated Hospital of Wenzhou Medical University, Ruian, People's Republic of China
| | - Gaojian Cao
- Department of Gastrointestinal Surgery, The Third Affiliated Hospital of Wenzhou Medical University, Ruian, People's Republic of China
| | - Zhenfeng Huang
- Department of Gastrointestinal Surgery, The Third Affiliated Hospital of Wenzhou Medical University, Ruian, People's Republic of China
| | - Kai Jin
- Department of Gastrointestinal Surgery, The Third Affiliated Hospital of Wenzhou Medical University, Ruian, People's Republic of China
| | - Haowei Hu
- Department of Gastrointestinal Surgery, The Third Affiliated Hospital of Wenzhou Medical University, Ruian, People's Republic of China
| | - Jie Yu
- Department of Gastrointestinal Surgery, The Third Affiliated Hospital of Wenzhou Medical University, Ruian, People's Republic of China
| | - Yu Zeng
- Department of Gastrointestinal Surgery, The Third Affiliated Hospital of Wenzhou Medical University, Ruian, People's Republic of China
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Potential Diagnostic, Prognostic and Therapeutic Targets of MicroRNAs in Human Gastric Cancer. Int J Mol Sci 2016; 17:ijms17060945. [PMID: 27322246 PMCID: PMC4926478 DOI: 10.3390/ijms17060945] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Revised: 06/01/2016] [Accepted: 06/07/2016] [Indexed: 12/11/2022] Open
Abstract
Human gastric cancer (GC) is characterized by a high incidence and mortality rate, largely because it is normally not identified until a relatively advanced stage owing to a lack of early diagnostic biomarkers. Gastroscopy with biopsy is the routine method for screening, and gastrectomy is the major therapeutic strategy for GC. However, in more than 30% of GC surgical patients, cancer has progressed too far for effective medical resection. Thus, useful biomarkers for early screening or detection of GC are essential for improving patients’ survival rate. MicroRNAs (miRNAs) play an important role in tumorigenesis. They contribute to gastric carcinogenesis by altering the expression of oncogenes and tumor suppressors. Because of their stability in tissues, serum/plasma and other body fluids, miRNAs have been suggested as novel tumor biomarkers with suitable clinical potential. Recently, aberrantly expressed miRNAs have been identified and tested for clinical application in the management of GC. Aberrant miRNA expression profiles determined with miRNA microarrays, quantitative reverse transcription-polymerase chain reaction and next-generation sequencing approaches could be used to establish sample specificity and to identify tumor type. Here, we provide an up-to-date summary of tissue-based GC-associated miRNAs, describing their involvement and that of their downstream targets in tumorigenic and biological processes. We examine correlations among significant clinical parameters and prognostic indicators, and discuss recurrence monitoring and therapeutic options in GC. We also review plasma/serum-based, GC-associated, circulating miRNAs and their clinical applications, focusing especially on early diagnosis. By providing insights into the mechanisms of miRNA-related tumor progression, this review will hopefully aid in the identification of novel potential therapeutic targets.
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Mu YP, Sun WJ, Lu CW, Su XL. MicroRNAs May Serve as Emerging Molecular Biomarkers for Diagnosis and Prognostic Assessment or as Targets for Therapy in Gastric Cancer. Asian Pac J Cancer Prev 2016; 16:4813-20. [PMID: 26163596 DOI: 10.7314/apjcp.2015.16.12.4813] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Gastric cancer (GC) is one of the most common cancers, with high incidences in East Asia countries. Most GC patients have been reported with low early diagnosis rate and show extremely poor prognosis. Therefore, it is necessary to develop novel and more sensitive biomarkers to improve early diagnosis and therapy in order to provide longer survival and better quality of life for gastric cancer patients. MicroRNAs (miRNAs) play crucial roles in GC development and progression. miRNAs have emerged as a novel molecular biomarker for cancer diagnosis, prognosis and therapy with surprising stability in tissues, serum or other body fluids. This review summarizes major advances in our current knowledge about potential miRNA biomarkers for GC that have been reported in the past two years.
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Affiliation(s)
- Yong-Ping Mu
- Department of Clinical Laboratory Center, The Affiliated People's Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia Autonomous Region, China E-mail : ;
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Gu X, Xue JQ, Han SJ, Qian SY, Zhang WH. Circulating microRNA-451 as a predictor of resistance to neoadjuvant chemotherapy in breast cancer. Cancer Biomark 2016; 16:395-403. [DOI: 10.3233/cbm-160578] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Wu X, Tang H, Liu G, Wang H, Shu J, Sun F. miR-448 suppressed gastric cancer proliferation and invasion by regulating ADAM10. Tumour Biol 2016; 37:10545-51. [PMID: 26852749 DOI: 10.1007/s13277-016-4942-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 01/29/2016] [Indexed: 02/07/2023] Open
Abstract
MicroRNAs (miRNAs) are a class of short, noncoding RNAs that act a crucial role in tumor development. Previous studies showed that miR-448 expression was deregulated in many tumors. However, the role of miR-448 in gastric cancer (GC) remains unknown. In our study, we demonstrated that miR-448 expression was downregulated in GC tissues compared with the corresponding nontumor tissues. We also showed that miR-448 expression was downregulated in GC cell lines. Ectopic expression of miR-448 suppressed GC cell proliferation, colony formation, and invasion. Moreover, we identified A Disintegrin And Metalloproteinases 10 (ADAM10) as a direct target gene of miR-448 in GC cell. ADAM10 expression was upregulated in GC tissues and cells. Furthermore, the expression level of miR-448 was negatively correlated with the expression level of ADAM10 in GC tissues. Moreover, ADAM10 overexpression rescued the effect of miR-448-mediated GC cell proliferation, colony formation, and invasion. These results demonstrated that miR-448 might play as a tumor suppressor miRNA partly through targeting ADAM10 expression.
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Affiliation(s)
- Xuesong Wu
- Department of Gastrointenstinal Surgery, The Second Affiliated Hospital of Kunming Medical University, Kunming, 650101, Yunnan, China
| | - Haoran Tang
- Department of Gastrointenstinal Surgery, The Second Affiliated Hospital of Kunming Medical University, Kunming, 650101, Yunnan, China
| | - Guobin Liu
- Department of Gastroenterology, The Second Affiliated Hospital of Kunming Medical University, Kunming, 650101, Yunnan, China
| | - Hui Wang
- Department of Gastroenterology, The Affiliated YanAn Hospital of Kunming Medical University, Kunming, 650051, Yunnan, China
| | - Jie Shu
- Department of Gastrointenstinal Surgery, The Second Affiliated Hospital of Kunming Medical University, Kunming, 650101, Yunnan, China
| | - Feng Sun
- Department of Gastrointenstinal Surgery, The Second Affiliated Hospital of Kunming Medical University, Kunming, 650101, Yunnan, China.
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Li W, Wang P, Zhang Z, Wang W, Liu Y, Qi Q. MiR-184 Regulates Proliferation in Nucleus Pulposus Cells by Targeting GAS1. World Neurosurg 2016; 97:710-715.e1. [PMID: 26805687 DOI: 10.1016/j.wneu.2016.01.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 01/03/2016] [Accepted: 01/04/2016] [Indexed: 12/15/2022]
Abstract
OBJECTIVE The precise mechanism of nucleus pulposus proliferation in the degeneration of the intervertebral disk pathogenesis remains to be implicated. MicroRNAs (MiRNAs) are a class of 18-22 nucleotides, which are small, noncoding RNAs that inhibit protein translation by binding to the 3'-UTR of target gene. Recent studies have shown that miRNAs play a crucial role in various cell biologies such as cell proliferation, invasion, migration, and cell cycle. However, the role of miR-184 in nucleus pulposus proliferation is still unknown. METHOD qRT-PCR was performed to measure the expression of miR-184. CCK-8 assay, qRT-PCR, and Western blot were used to measure the functional role of miR-184 in nucleus pulposus (NP) cells. Western blot and Luciferase assays were done to find the miR-184 target gene. RESULT We demonstrated that expression of miR-184 was upregulated in degenerative NP tissues compared with that in the control NP tissues, and the expression of miR-184 was positively correlated with disk degeneration grade. We identified Growth Arrest Specific Gene 1 (GAS1) as a direct target gene of miR-184 in NP cells, and ectopic expression of miR-184 promoted NP cells proliferation. In addition, we found that GAS1 expression was downregulated in degenerative NP tissues compared with that in the control NP tissues and the GAS1 expression was inversely correlated with the grade of disk degeneration. Moreover, we demonstrated that miR-184 overexpression could induce AKT phosphorylation and ectopic expression of GAS1 decreased the miR-184 overexpressing NP cells proliferation. CONCLUSION These results demonstrated that miR-184 and the GAS1/Akt pathway may be a potential therapeutic target for intervertebral disc degeneration.
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Affiliation(s)
- Weiming Li
- Department of Orthopaedics, The First Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China
| | - Pei Wang
- Department of Orthopaedics, The First Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China
| | - Zheng Zhang
- Department of Orthopaedics, The First Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China
| | - Wantao Wang
- Department of Orthopaedics, The First Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China
| | - Yang Liu
- Department of Orthopaedics, The First Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China
| | - Quan Qi
- Department of Orthopaedics, The First Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China.
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13
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Dossa AY, Escobar O, Golden J, Frey MR, Ford HR, Gayer CP. Bile acids regulate intestinal cell proliferation by modulating EGFR and FXR signaling. Am J Physiol Gastrointest Liver Physiol 2016; 310:G81-92. [PMID: 26608185 PMCID: PMC4719061 DOI: 10.1152/ajpgi.00065.2015] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 11/10/2015] [Indexed: 01/31/2023]
Abstract
Bile acids (BAs) are synthesized in the liver and secreted into the intestine. In the lumen, enteric bacteria metabolize BAs from conjugated, primary forms into more toxic unconjugated, secondary metabolites. Secondary BAs can be injurious to the intestine and may contribute to disease. The epidermal growth factor receptor (EGFR) and the nuclear farnesoid X receptor (FXR) are known to interact with BAs. In this study we examined the effects of BAs on intestinal epithelial cell proliferation and investigated the possible roles for EGFR and FXR in these effects. We report that taurine-conjugated cholic acid (TCA) induced proliferation, while its unconjugated secondary counterpart deoxycholic acid (DCA) inhibited proliferation. TCA stimulated phosphorylation of Src, EGFR, and ERK 1/2. Pharmacological blockade of any of these pathways or genetic ablation of EGFR abrogated TCA-stimulated proliferation. Interestingly, Src or EGFR inhibitors eliminated TCA-induced phosphorylation of both molecules, suggesting that their activation is interdependent. In contrast to TCA, DCA exposure diminished EGFR phosphorylation, and pharmacological or siRNA blockade of FXR abolished DCA-induced inhibition of proliferation. Taken together, these results suggest that TCA induces intestinal cell proliferation via Src, EGFR, and ERK activation. In contrast, DCA inhibits proliferation via an FXR-dependent mechanism that may include downstream inactivation of the EGFR/Src/ERK pathway. Since elevated secondary BA levels are the result of specific bacterial modification, this may provide a mechanism through which an altered microbiota contributes to normal or abnormal intestinal epithelial cell proliferation.
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Affiliation(s)
- Avafia Y. Dossa
- 1Division of Pediatric Surgery, Children's Hospital Los Angeles, Los Angeles, California;
| | - Oswaldo Escobar
- 1Division of Pediatric Surgery, Children's Hospital Los Angeles, Los Angeles, California;
| | - Jamie Golden
- 1Division of Pediatric Surgery, Children's Hospital Los Angeles, Los Angeles, California;
| | - Mark R. Frey
- 2Keck School of Medicine, University of Southern California, Los Angeles, California; and ,3Pediatrics, Biochemistry, and Molecular Biology, Children's Hospital Los Angeles, Los Angeles, California
| | - Henri R. Ford
- 1Division of Pediatric Surgery, Children's Hospital Los Angeles, Los Angeles, California; ,2Keck School of Medicine, University of Southern California, Los Angeles, California; and
| | - Christopher P. Gayer
- 1Division of Pediatric Surgery, Children's Hospital Los Angeles, Los Angeles, California; ,2Keck School of Medicine, University of Southern California, Los Angeles, California; and
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He K, Niu G, Gao J, Liu JX, Qu H. MicroRNA-92 expression may be associated with reduced estrogen receptor β1 mRNA levels in cervical portion of uterosacral ligaments in women with pelvic organ prolapse. Eur J Obstet Gynecol Reprod Biol 2016; 198:94-99. [PMID: 26803387 DOI: 10.1016/j.ejogrb.2016.01.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 11/24/2015] [Accepted: 01/01/2016] [Indexed: 11/27/2022]
Abstract
OBJECTIVE This study examined microRNA-92 (miR-92) expression level in relation to the mRNA level of its potential target gene, estrogen receptor β1 (ERβ1), in female patients diagnosed with pelvic organ prolapse (POP). STUDY DESIGN Between July 2012 and September 2014, a total of 104 patients were recruited at the First Affiliated Hospital of Sun Yat-sen University, which included 56 POP patients and 48 non-POP control subjects. Based on POP-Q score, the POP patients were further categorized into POP II and POP III groups. Quantitative real-time polymerase chain reaction (qRT-PCR) was used to quantify miR-92 expression level. ERβ1 tissue expression was measured by western blot and immunohistochemistry (IHC) methods. SPSS 19.0 software was used for statistical analysis. RESULTS No remarkable differences were observed between the POP group and non-POP group, and between the POP II and POP III groups, with respect to age, body mass index (BMI), parity, menopause status, and family history of POP. The expression level of miR-92 in the POP group was dramatically higher than the non-POP group (P<0.05). Consistent with the disease status, miR-92 expression level in POP III group was markedly higher than the POP II group (P<0.05). Western blot analysis revealed significantly reduced levels of ERβ1 in the POP group compared to the non-POP group, with similar results obtained between the POP III and POP II groups (all P<0.05). IHC results showed ERβ1 staining mainly in the nucleus and semi-quantitative measurements, expressed as positive expression rate, revealed that ERβ1 level in the POP group was clearly lower than non-POP group. Finally, statistical analysis of IHC results from uterosacral ligament tissue showed inverse correlation between miR-92 and ERβ1 expression levels in POP patients (P<0.05). CONCLUSIONS Our results revealed increased miR-92 expression and decreased ERβ1 level in uterosacral ligaments of women diagnosed with POP, compared to non-POP subjects POP III patients exhibited more severe changes than POP II patients. Further, ERβ1expression is inversely correlated to miR-92 expression. Taken together, our results suggest that miR-92 and ERβ1 expression levels may be used as reliable diagnostic markers for assessing the severity of POP.
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Affiliation(s)
- Ke He
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, PR China
| | - Gang Niu
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, PR China
| | - Jun Gao
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, PR China
| | - Jun-Xiu Liu
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, PR China
| | - Hu Qu
- Department of Urology, Reproductive Center, the Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou 510655, PR China.
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15
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Zhou X, Jin W, Jia H, Yan J, Zhang G. MiR-223 promotes the cisplatin resistance of human gastric cancer cells via regulating cell cycle by targeting FBXW7. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2015; 34:28. [PMID: 25888377 PMCID: PMC4387683 DOI: 10.1186/s13046-015-0145-6] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 03/12/2015] [Indexed: 12/16/2022]
Abstract
Background Increasing evidence showed that miRNAs serve as modulators of human cancer, either as oncogene or tumor suppressors. Cisplatin resistance is the most common cause of chemotherapy failure in gastric cancer (GC). However, the roles of miRNAs in cisplatin resistance of GC remain largely unknown. The aim of the study was to identify a novel miRNA/gene pathway that regulates the sensitivity of GC cells to cisplatin. Methods In this study, we chose miR-223 by qRT-PCR analysis, the most significantly up-regulated miRNA in GC, to investigate its formation of DDP-resistant phenotype of GC cells and possible molecular mechanisms. Results We found that miR-223 was most significantly up-regulated miRNA in DDP-resistant GC cells compared with parental GC cells. Besides, its expression was also significantly up-regulated in GC tissues. FBXW7 was identified as the direct and functional target gene of miR-223. Overexpression of FBXW7 could mimic the effect of miR-223 down-regulation and silencing of FBXW7 could partially reverse the effect of miR-223 down-regulation on DDP resistance of DDP-resistant GC cells. Besides, miR-223 and FBXW7 could affect the G1/S transition of cell cycle by altering some certain cell cycle regulators. Furthermore, miR-223 was found to be significantly up-regulated in H. pylori infected tissues and cells, suggesting that H. pylori infection may lead to GC development and DDP resistance. Conclusions Our findings revealed the roles of miR-223/FBXW7 signaling in the DDP resistance of GC cells and targeting it will be a potential strategic approach for reversing the DDP resistance in human GC. Electronic supplementary material The online version of this article (doi:10.1186/s13046-015-0145-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xiaoying Zhou
- Department of Gastroenterology, First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China. .,First Clinical Medical College of Nanjing Medical University, Nanjing, 210029, China.
| | - Wujuan Jin
- Department of Gastroenterology, First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China. .,First Clinical Medical College of Nanjing Medical University, Nanjing, 210029, China.
| | - Hongyan Jia
- Department of Digestive Endoscopy Center, First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.
| | - Jin Yan
- Department of Gastroenterology, First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China. .,First Clinical Medical College of Nanjing Medical University, Nanjing, 210029, China.
| | - Guoxin Zhang
- Department of Gastroenterology, First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China. .,First Clinical Medical College of Nanjing Medical University, Nanjing, 210029, China.
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16
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Novák J, Olejníčková V, Tkáčová N, Santulli G. Mechanistic Role of MicroRNAs in Coupling Lipid Metabolism and Atherosclerosis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 887:79-100. [PMID: 26662987 PMCID: PMC4871243 DOI: 10.1007/978-3-319-22380-3_5] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
MicroRNAs (miRNAs, miRs) represent a group of powerful and versatile posttranscriptional regulators of gene expression being involved in the fine control of a plethora of physiological and pathological processes. Besides their well-established crucial roles in the regulation of cell cycle, embryogenesis or tumorigenesis, these tiny molecules have also been shown to participate in the regulation of lipid metabolism. In particular, miRs orchestrate cholesterol and fatty acids synthesis, transport, and degradation and low-density and high-density lipoprotein (LDL and HDL) formation. It is thus not surprising that they have also been reported to affect the development and progression of several lipid metabolism-related disorders including liver steatosis and atherosclerosis. Mounting evidence suggests that miRs might represent important "posttranscriptional hubs" of lipid metabolism, which means that one miR usually targets 3'-untranslated regions of various mRNAs that are involved in different steps of one precise metabolic/signaling pathway, e.g., one miR targets mRNAs of enzymes important for cholesterol synthesis, degradation, and transport. Therefore, changes in the levels of one key miR affect various steps of one pathway, which is thereby promoted or inhibited. This makes miRs potent future diagnostic and even therapeutic tools for personalized medicine. Within this chapter, the most prominent microRNAs involved in lipid metabolism, e.g., miR-27a/b, miR-33/33*, miR-122, miR-144, or miR-223, and their intracellular and extracellular functions will be extensively discussed, in particular focusing on their mechanistic role in the pathophysiology of atherosclerosis. Special emphasis will be given on miR-122, the first microRNA currently in clinical trials for the treatment of hepatitis C and on miR-223, the most abundant miR in lipoprotein particles.
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Affiliation(s)
- Jan Novák
- 2nd Department of Internal Medicine, St. Anne's University Hospital and Faculty of Medicine, Masaryk University, Brno, Czech Republic.
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Kamenice 5-building A18, Brno, 62500, Czech Republic.
- Department of Physiology, Faculty of Medicine, Masaryk University, Kamenice 5-building A20, Brno, 62500, Czech Republic.
| | - Veronika Olejníčková
- Department of Physiology, Faculty of Medicine, Masaryk University, Kamenice 5-building A20, Brno, 62500, Czech Republic
| | - Nikola Tkáčová
- Department of Physiology, Faculty of Medicine, Masaryk University, Kamenice 5-building A20, Brno, 62500, Czech Republic
| | - Gaetano Santulli
- Columbia University Medical Center, New York Presbyterian Hospital —Manhattan, New York, NY, USA; “Federico II” University Hospital, Naples, Italy
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Liu M, Zhi Q, Wang W, Zhang Q, Fang T, Ma Q. Up-regulation of miR-592 correlates with tumor progression and poor prognosis in patients with colorectal cancer. Biomed Pharmacother 2014; 69:214-20. [PMID: 25661360 DOI: 10.1016/j.biopha.2014.12.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 12/01/2014] [Indexed: 02/07/2023] Open
Abstract
miR-592, as a potential biomarker, has been linked to several cancers. However, the expression level and prognostic value of miR-592 in CRC have not been elucidated. In this study, we detected the miR-592 expression in CRC serum, tumor tissues, adjacent non-tumor tissues (NATs) and four colorectal cancer cell lines by RT-PCR. Our data proved that miR-592 expression was up-regulated in clinical CRC serum and tissues (P<0.05). Serum or tissue miR-592 in CRC metastatic patients also maintained a high level, compared to that in non-metastatic CRC patients (P<0.05). After radical surgery, postoperative serum miR-592 level in CRC patients significantly decreased (P<0.05). Our clinicopathological analysis revealed that high miR-592 was significant associated with the tumor size (P=0.008), TNM stage (P=0.026), distant metastasis (P=0.004) and preoperative CEA level (P=0.022), which led to a shorter overall survival rate in CRC patients (P=0.032). Furthermore, we designed and transfected miR-592 mimics or inhibitors into the corresponding CRC lines, and our experiments in vitro demonstrated that miR-592 could promote cell proliferation, wound healing and invasion ability of CRC cells (P<0.05), while miR-592 did not influence the CRC cell apoptosis (P>0.05). All these results suggested that miR-592 functioned as a novel and potential carcinogen-initiated and metastasis-related biomarker in CRC, and down-regulation of miR-592 might be considered as a potentially significant molecular treatment strategy for CRC patients.
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Affiliation(s)
- Mulin Liu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Medical College, Xian Jiaotong University, Xian 710061, China
| | - Qiaoming Zhi
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Wenbin Wang
- Department of General Surgery, The Fourth Affiliated Hospital of Anhui Medical University, Hefei 230000, China
| | - Qiao Zhang
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Bengbu Medical College, Bengbu 233030, China
| | - Taotao Fang
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Bengbu Medical College, Bengbu 233030, China
| | - Qingyong Ma
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Medical College, Xian Jiaotong University, Xian 710061, China.
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Wang X, Kuang Y, Shen X, Zhou H, Chen Y, Han Y, Yuan B, Zhou J, Zhao H, Zhi Q, Xue X. Evaluation of miR-720 prognostic significance in patients with colorectal cancer. Tumour Biol 2014; 36:719-27. [PMID: 25286763 DOI: 10.1007/s13277-014-2697-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Accepted: 09/30/2014] [Indexed: 12/21/2022] Open
Abstract
Aberrant expression of miR-720 had been reported in several cancers. However, the expression level and prognostic value of miR-720 in colorectal cancer (CRC) had not been addressed. In our study, we detected the expression level of miR-720 in 96 CRC tissues to evaluate its clinicopathological characteristics in colorectal cancer. Kaplan-Meier survival curve was performed to evaluate the prognostic role of miR-720 in patients with CRC. Furthermore, in vitro, we transfected the miR-720 mimics or inhibitors into the corresponding CRC cell lines and evaluated the effects on the abilities of cell growth, colony formation, migration, wound healing, and invasion in CRC cells. Our data showed that miR-720 level was significantly upregulated in CRC tissues than that in corresponding normal-appearing tissues (NATs) (p < 0.05), and high miR-720 correlated with the tumor size (p = 0.014), tumor-node-metastasis (TNM) stage (p = 0.040), lymphatic metastasis (p = 0.008), and distant metastasis (p = 0.016), which led to a poorer 5-year overall survival rate in CRC patients (p < 0.05). Our experiments in vitro also confirmed that miR-720 could promote the cell growth (p < 0.05), abilities of colony formation (p < 0.05), wound healing (p < 0.05), migration (p < 0.05), and invasion of CRC cells (p < 0.05). We identified StarD13 gene as a putative target of miR-720 in colorectal cancer by bioinformatics analysis, and subsequent dual luciferase activity and Western blot assay further certified that miR-720 might specifically target the StarD13 3'-untranslated region (UTR) at the 795 region (p < 0.05). miR-720 might act as a promoting factor in the development of CRC and could be a prognostic indicator in the prognosis of CRC. Downregulation of miR-720 might be considered to be a potentially important molecular treatment strategy for early stage CRC patients.
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Affiliation(s)
- Xu Wang
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China
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