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Boicean A, Birsan S, Ichim C, Boeras I, Roman-Filip I, Blanca G, Bacila C, Fleaca RS, Dura H, Roman-Filip C. Has-miR-129-5p's Involvement in Different Disorders, from Digestive Cancer to Neurodegenerative Diseases. Biomedicines 2023; 11:2058. [PMID: 37509697 PMCID: PMC10377727 DOI: 10.3390/biomedicines11072058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 07/13/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023] Open
Abstract
At present, it is necessary to identify specific biochemical, molecular, and genetic markers that can reliably aid in screening digestive cancer and correlate with the degree of disease development. Has-miR-129-5p is a small, non-coding molecule of RNA, circulating in plasma, gastric juice, and other biological fluids; it plays a protective role in tumoral growth, metastasis, etc. Furthermore, it is involved in various diseases, from the development of digestive cancer in cases of downregulation to neurodegenerative diseases and depression. Methods: We examined meta-analyses, research, and studies related to miR-129-5-p involved in digestive cancer and its implications in cancer processes, as well as metastasis, and described its implications in neurological diseases. Conclusions: Our review outlines that miR-129-5p is a significant controller of different pathways, genes, and proteins and influences different diseases. Some important pathways include the WNT and PI3K/AKT/mTOR pathways; their dysregulation results in digestive neoplasia and neurodegenerative diseases.
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Affiliation(s)
- Adrian Boicean
- Faculty of Medicine, Lucian Blaga University of Sibiu, 550169 Sibiu, Romania
| | - Sabrina Birsan
- Faculty of Medicine, Lucian Blaga University of Sibiu, 550169 Sibiu, Romania
| | - Cristian Ichim
- Faculty of Medicine, Lucian Blaga University of Sibiu, 550169 Sibiu, Romania
| | - Ioana Boeras
- Molecular Biology Laboratory of the Applied Ecology Research Center, Faculty of Sciences, Lucian Blaga University of Sibiu, 550012 Sibiu, Romania
| | - Iulian Roman-Filip
- Department of Neurology, "George Emil Palade" University of Medicine, Pharmacy, Sciences and Technology, 540136 Targu Mures, Romania
| | - Grama Blanca
- Faculty of Social Sciences, Lucian Blaga University of Sibiu, 550012 Sibiu, Romania
| | - Ciprian Bacila
- Faculty of Medicine, Lucian Blaga University of Sibiu, 550169 Sibiu, Romania
| | - Radu Sorin Fleaca
- Faculty of Medicine, Lucian Blaga University of Sibiu, 550169 Sibiu, Romania
| | - Horatiu Dura
- Faculty of Medicine, Lucian Blaga University of Sibiu, 550169 Sibiu, Romania
| | - Corina Roman-Filip
- Faculty of Medicine, Lucian Blaga University of Sibiu, 550169 Sibiu, Romania
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2
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Zhu YL, Lian YM, Wang JK, Chen ZP, Yu RQ. Highly Sensitive and Specific Mass Spectrometric Platform for miRNA Detection Based on the Multiple-Metal-Nanoparticle Tagging Strategy. Anal Chem 2021; 93:5839-5848. [PMID: 33797890 DOI: 10.1021/acs.analchem.1c00065] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The multiple-metal-nanoparticle tagging strategy has generally been applied to the multiplexed detection of multiple analytes of interest such as microRNAs (miRNAs). Herein, it was used for the first time to improve both the specificity and sensitivity of a novel mass spectroscopic platform for miRNA detection. The mass spectroscopic platform was developed through the integration of the ligation reaction, hybridization chain reaction amplification, multiple-metal-nanoparticle tagging, and inductively coupled plasma mass spectrometry. The high specificity resulted from the adoption of the ligation reaction is further enhanced by the multiple-metal-nanoparticle tagging strategy. The combination of hybridization chain reaction amplification and metal nanoparticle tagging endows the proposed platform with the feature of high sensitivity. The proposed mass spectrometric platform achieved quite satisfactory quantitative results for Let-7a in real-world cell line samples with accuracy comparable to that of the real-time quantitative reverse-transcriptase polymerase chain reaction method. Its limit of detection and limit of quantification for Let-7a were experimentally determined to be about 0.5 and 10 fM, respectively. Furthermore, due to the unique way of utilizing the multiple-metal-nanoparticle tagging strategy, the proposed platform can unambiguously discriminate between the target miRNA and nontarget ones with single-nucleotide polymorphisms based on their response patterns defined by the relative mass spectral intensities among the multiple tagged metal elements and can also provide location information of the mismatched bases. Its unique advantages over conventional miRNA detection methods make the proposed platform a promising and alternative tool in the fields of clinical diagnosis and biomedical research.
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Affiliation(s)
- Yan-Li Zhu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Yan-Mei Lian
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Ji-Kai Wang
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy & Pharmacology, University of South China, Hengyang 421001, P. R. China
| | - Zeng-Ping Chen
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Ru-Qin Yu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P. R. China
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3
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Zahedipour F, Jamialahmadi K, Karimi G. The role of noncoding RNAs and sirtuins in cancer drug resistance. Eur J Pharmacol 2020; 877:173094. [PMID: 32243871 DOI: 10.1016/j.ejphar.2020.173094] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 03/22/2020] [Accepted: 03/30/2020] [Indexed: 12/21/2022]
Abstract
Cancer is a rising and major health issue around the world. The acquisition of resistance to chemotherapeutic drugs is a great obstacle for the effective treatment of nearly all cancers. Drug resistance is regulated by multiple factors and mechanisms including genetic mutations, abnormal expression of some cellular transporters such as multidrug resistance (MDR) transporters, changes in apoptotic pathways, cancer stem cells, tumor microenvironment, and noncoding RNAs (ncRNAs). Evidence clearly indicates a key role for sirtuins in several characteristics of cancer drug resistance. Recent studies demonstrated the crucial impact of some ncRNAs on sirtuins expression leading to modulation of chemotherapy resistance in cancers. In this review, we will focus on the current findings about the impacts of ncRNAs on the sirtuins pathway and their role in drug resistance of cancer.
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Affiliation(s)
- Fatemeh Zahedipour
- Department of Medical Biotechnology and Nanotechnology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Khadijeh Jamialahmadi
- Department of Medical Biotechnology and Nanotechnology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran; Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Gholamreza Karimi
- School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran; Pharmaceutical Research Center, Institute of Pharmaceutical Technology, Mashhad University of Medical Sciences, Mashhad, Iran.
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4
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Safaralizadeh R, Ajami N, Nemati M, Hosseinpourfeizi M, Azimzadeh Isfanjani A, Moaddab SY. Disregulation of miR-216a and miR-217 in Gastric Cancer and Their Clinical Significance. J Gastrointest Cancer 2019; 50:78-83. [PMID: 29177609 DOI: 10.1007/s12029-017-0019-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE The majority of gastric cancer (GC) diagnoses occur at the middle or late stage of the disease, indicating that finding novel biomarkers that could be detectable at earlier stage is urgently needed. Accumulating studies have shown that microRNAs, a class of tiny single-stranded RNAs, play important roles in multiple biological processes including cancer development. The present study aimed to evaluate the effect of miR-216a and miR-217 in GC. MATERIAL AND METHODS The real-time quantitative reverse-transcription PCR was exploited to identify and compare the expression levels of miR-216a and miR-217 in 37 pairs of samples of gastric cancer tissue and adjacent normal tissue. Superimposed on this, the potential relationship between miR-216a/217 levels and clinicopathological parameters in patients suffering GC was explored. RESULTS The results obtained from this study showed that the miR-216a is significantly upregulated in gastric cancer tissues, compared with adjacent normal tissues, but the altered expression of miR-217 was not significant. For miR-216a/217, no significant correlations were detected between expression levels of these miRNAs and clinical and pathological characteristics of patients. CONCLUSION This prospective study proposes that upregulation of miR-216a might represent an important mechanism for the development of gastric cancer.
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Affiliation(s)
- Reza Safaralizadeh
- Department of Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
| | - Naser Ajami
- Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Masoumeh Nemati
- Department of Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran.
| | | | | | - Seyed-Yaghob Moaddab
- Liver and Gastroenterology Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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5
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Parvaee P, Sarmadian H, Khansarinejad B, Amini M, Mondanizadeh M. Plasma Level of MicroRNAs, MiR-107, MiR-194 and MiR-210 as Potential Biomarkers for Diagnosis Intestinal-Type Gastric
Cancer in Human. Asian Pac J Cancer Prev 2019; 20:1421-1426. [PMID: 31127902 PMCID: PMC6857871 DOI: 10.31557/apjcp.2019.20.5.1421] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Background: Timely and sensitive diagnosis of gastric cancer is crucial for efficient treatment and survival of the patients. microRNAs have been considered as diagnostic biomarkers in different type of cancers including gastric cancer. In the present study, the expression profile of four microRNAs, miR-103, miR-107, miR-194 and miR-210 were evaluated in patients with intestinal-type of gastric cancer (IGC) in order to assess their diagnosis utility as noninvasive biomarkers. Methods: A total number of 100 plasma samples from patients with gastric cancer and healthy controls were obtained and total RNA was extracted using a commercial monophasic solution of phenol and guanidium thiocyanate. Reverse transcription (RT) reactions were performed by specific stem-loop RT primers and M-MuLV RT-enzyme. The expression patterns of microRNAs were assessed using reverse transcription quantitative real-time PCR (RT-qPCR) method and the expression of SNORD47 RNA was used as the reference for normalization. Results: The results indicate that the plasma levels of miR-107, miR-194, and miR-210 were significantly lower in patients. Receiver operating characteristic (ROC) curve analysis showed that the patients could be distinguished from healthy individuals at the cutoff levels of 0.504, 0.266, and 0.394 of miR-107, miR-194, and miR-210, respectively. On the other hand, the expression levels of these miRNAs were not significantly different in different clinicopathological stages of the disease. Conclusion: These findings suggest that the plasma levels of miR-107, miR-194 and miR-210 were downregulated in patients with ICG and propose these molecules as potential non-invasive biomarkers for detection of IGC.
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Affiliation(s)
- Pegah Parvaee
- Department of Biotechnology and Molecular Medicine, Arak University of Medical Sciences, Arak, Iran.
| | - Hossein Sarmadian
- Infectious Diseases Research Center, Arak University of Medical Sciences, Arak, Iran
| | - Behzad Khansarinejad
- Department of Microbiology and Immunology, Arak University of Medical Sciences, Arak, Iran.,Molecular and Medicine Research Center, Arak University of Medical Sciences, Arak, Iran
| | - Mahmood Amini
- Department of Surgery, Arak University of Medical Sciences, Arak, Iran
| | - Mahdieh Mondanizadeh
- Department of Biotechnology and Molecular Medicine, Arak University of Medical Sciences, Arak, Iran. ,Molecular and Medicine Research Center, Arak University of Medical Sciences, Arak, Iran
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MicroRNA-7 as a potential therapeutic target for aberrant NF-κB-driven distant metastasis of gastric cancer. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2019; 38:55. [PMID: 30728051 PMCID: PMC6364399 DOI: 10.1186/s13046-019-1074-6] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 01/30/2019] [Indexed: 12/24/2022]
Abstract
Background Dysregulated miR-7 and aberrant NF-κB activation were reported in various human cancers. However, the expression profile, clinical relevance and dysregulated mechanism of miR-7 and NF-κB RelA/p65 in human gastric cancers (GC) metastasis remain largely unknown. This study is to investigate the expression profile, clinical relevance and dysregulated mechanism of miR-7 and NF-κB RelA/p65 in GC and to explore the potential therapeutic effect of miR-7 to GC distant metastasis. Methods TCGA STAD and NCBI GEO database were used to investigate the expression profile of miR-7 and NF-κB RelA/p65 and clinical relevance. Lentivirus-mediated gene delivery was applied to explore the therapeutic effect of miR-7 in GC. Real-time PCR, FACS, IHC, IF, reporter gene assay, IP, pre-miRNA-7 processing and binding assays were performed. Results Low miR-7 correlated with high RelA/p65 in GC with a clinical relevance that low miR-7 and high RelA/p65 as prognostic indicators of poor survival outcome of GC patients. Moreover, an impaired pre-miR-7 processing caused by dysregulated Dicer1 expression is associated with downregulated miR-7 in GC cells. Functionally, delivery of miR-7 displays therapeutic effects to GC lung and liver metastasis by alleviating hemangiogenesis, lymphangiogenesis as well as inflammation cells infiltration. Mechanistically, miR-7 suppresses NF-κB transcriptional activity and its downstream metastasis-related molecules Vimentin, ICAM-1, VCAM-1, MMP-2, MMP-9 and VEGF by reducing p65 and p-p65-ser536 expression. Pharmacologic prevention of NF-κB activator LPS obviously restored miR-7-suppressed NF-κB transcriptional activation and significantly reverted miR-7-inhibited cell migration and invasion. Conclusions Our data suggest loss of miR-7 in GC promotes p65-mediated aberrant NF-κB activation, facilitating GC metastasis and ultimately resulting in the worse clinical outcome. Thus, miR-7 may act as novel prognostic biomarker and potential therapeutic target for aberrant NF-κB-driven GC distant metastasis. Electronic supplementary material The online version of this article (10.1186/s13046-019-1074-6) contains supplementary material, which is available to authorized users.
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7
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Azimzadeh-Isfanjani A, Safaralizadeh R, Hosseinpour-Feizi M, Shokouhi B, Nemati M, Moaddab SY. Expression of miR-520c in intestinal type gastric adenocarcinoma. J Gastrointest Oncol 2018; 9:1184-1189. [PMID: 30603140 DOI: 10.21037/jgo.2018.08.09] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Background MicroRNAs are small non-coding RNAs that participate in post-transcriptional gene regulation in cells thereby playing active role in pathological conditions and have been nominated as new class of biomarkers in disease including cancer. miR-520c has been reported as potential oncogenic micro-RNA in several previous studies. Gastric cancer is the most common cancer of digestive tract and the fourth prevalent cancer worldwide with the intestinal-type gastric adenocarcinoma (IGA) the dominant type of gastric malignancies. This study aimed to explore miR-520c putative role, in IGA and patient's clinicopathological features. Methods Total RNA was first extracted from 42 pairs of IGA tissues and relevant non-tumorous adjacent tissues. cDNA was synthesized from extracted RNAs using specific primers for miR-520c. The level of miR-520c was quantified using SYBER Green Real-Time PCR master mix. The relationship between miR-520c expression and clinicopathological features were examined. Results Our study resulted in no differential expression of miR-520c in IGA. There was no significant correlation between miR-520c expression and clinicopathological features including tumor grade, genus and age groups. Conclusions To our knowledge, this is the first report about exploring miR-520c expression in IGA tissue samples. Our results do not verify miR-520c previously established oncogenic role in IGA.
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Affiliation(s)
| | - Reza Safaralizadeh
- Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
| | | | - Behrouz Shokouhi
- Pathology Department, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Masuomeh Nemati
- Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
| | - Seyyed-Yaghoub Moaddab
- Liver and Gastroenterology Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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8
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Zare A, Ahadi A, Larki P, Omrani MD, Zali MR, Alamdari NM, Ghaedi H. The clinical significance of miR-335, miR-124, miR-218 and miR-484 downregulation in gastric cancer. Mol Biol Rep 2018; 45:1587-1595. [PMID: 30171475 DOI: 10.1007/s11033-018-4278-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 07/22/2018] [Indexed: 12/15/2022]
Abstract
Gastric cancer (GC) is one of the leading types of malignancy worldwide, particularly in Asian populations. Although the exact molecular mechanism of GC development remains unknown, microRNA (miRNA) has recently been shown to be involved. The current study aims to investigate the expression levels of bioinformatically ranked miRNAs in gastric tissues. Using bioinformatics tools, we prioritized miRNAs thought to be implicated in GC. Furthermore, polyA-qPCR was used to validate bioinformatics findings in 40 GC, 31 normal gastric tissue (NG) and 45 gastric dysplasia (GD) samples. As identified by bioinformatics analysis, miR-335 was shown to be the top-ranked miRNA implicated in GC. Moreover, a significant downregulation of miR-335, miR-124, miR-218 and miR-484 was found in GC and GD compared to NG samples. We found bioinformatics to be an efficient approach to finding candidate miRNAs relevant to GC development. Finally, the findings show that downregulation of miRNAs such as miR-124 and miR-218 in gastric tissue can be a significant indicator for neoplastic transformation.
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Affiliation(s)
- Ali Zare
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Velenjak St., Shahid Chamran Highway, Tehran, Iran
| | - Alireza Ahadi
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Velenjak St., Shahid Chamran Highway, Tehran, Iran
| | - Pegah Larki
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Velenjak St., Shahid Chamran Highway, Tehran, Iran
| | - Mir Davood Omrani
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Velenjak St., Shahid Chamran Highway, Tehran, Iran.,Urogenital Stem Cell Research, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Zali
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Nasser Malekpour Alamdari
- Department of General Surgery, Clinical Research and Development Unit at Modarres Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamid Ghaedi
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Velenjak St., Shahid Chamran Highway, Tehran, Iran.
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Xu W, He L, Li Y, Tan Y, Zhang F, Xu H. Silencing of lncRNA ZFAS1 inhibits malignancies by blocking Wnt/β-catenin signaling in gastric cancer cells. Biosci Biotechnol Biochem 2018; 82:456-465. [PMID: 29424266 DOI: 10.1080/09168451.2018.1431518] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Gastric cancer is a common malignancy with high mortality. Long noncoding RNA (lncRNA) zinc finger antisense (ZFAS)1 is upregulated in gastric cancer specimens compared with the para-carcinoma tissues. The silencing of ZFAS1 inhibited the growth, proliferation, cell cycle progress, migration, invasion and epithelial-mesenchymal transition (EMT), and enhanced the sensitivity to cis-platinum or paclitaxel in SGC7901 cells, as evidenced by the expression changes of proliferating cell nuclear antigen, Cyclin D1, Cyclin E, Cyclin B1, E-cadherin, N-cadherin, vimentin, matrix metalloproteinase (MMP)-2 and MMP-14. The ZFAS1 also activated the Wnt/β-catenin signaling. Subsequently, the ZFAS1 knockdown-induced the inhibition of migration, invasion, EMT and resistance to chemotherapeutic reagens was reversed by the overexpression of β-catenin. In summary, the silencing of ZFAS1 inhibited the growth, proliferation, cell cycle progress, migration, invasion, EMT and chemotherapeutic tolerance by blocking the Wnt/β-catenin signaling in gastric cancer cells.
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Affiliation(s)
- Weiran Xu
- a Department of Gastroenterology , The First Hospital of Jilin University , Changchun , People's Republic of China
| | - Liang He
- b Department of Gastrointestinal Surgery , The First Hospital of Jilin University , Changchun , People's Republic of China
| | - Ying Li
- a Department of Gastroenterology , The First Hospital of Jilin University , Changchun , People's Republic of China
| | - Yan Tan
- c Tumor Biotherapy Center , The People's Hospital of Jilin Province , Changchun , People's Republic of China
| | - Fan Zhang
- a Department of Gastroenterology , The First Hospital of Jilin University , Changchun , People's Republic of China
| | - Hong Xu
- a Department of Gastroenterology , The First Hospital of Jilin University , Changchun , People's Republic of China
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10
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Shirmohammadi K, Sohrabi S, Jafarzadeh Samani Z, Effatpanah H, Yadegarazari R, Saidijam M. Evaluation of altered expression of miR-9 and miR-106a as an early diagnostic approach in gastric cancer. J Gastrointest Oncol 2018; 9:46-51. [PMID: 29564170 DOI: 10.21037/jgo.2017.11.04] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Background The role of microRNAs (miRNAs) in cellular processes such as growth, apoptosis, differentiation and proliferation verifies the importance of miRNAs in carcinogenesis. Moreover, levels of miRNAs are dysregulated in cancer cells, so they could be used as novel classes of biomarkers for diagnosing cancer. The oncogenic role of miR-106a and its increased expression have been demonstrated in some cancers. In contrast, there is no consensus for miR-9 expression rate in different cancers. Therefore, this study was done to investigate the role of miR-106a and miR-9 in gastric cancer (GC). Methods The current study was performed on 31 GC tissues as case, and 31 healthy adjacent tissues as a control group. Quantitative reverse transcriptase (q-RT) PCR was used for studying the expression rate of both miR-106a and miR-9. Results The expression rate of both miRNAs in cancerous tissues was significantly higher than healthy adjacent tissues (≈10 folds) (P<0.05). Conclusions The results showed that the expression rate of both markers was significantly increased in cancerous tissues. Therefore, they can be suggested as potential biomarkers for cancer diagnosis and prognosis as well as targets for therapy.
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Affiliation(s)
- Khadije Shirmohammadi
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Sareh Sohrabi
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Zahra Jafarzadeh Samani
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Hosein Effatpanah
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Reza Yadegarazari
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Massoud Saidijam
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
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11
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Eun JW, Kim HS, Shen Q, Yang HD, Kim SY, Yoon JH, Park WS, Lee JY, Nam SW. MicroRNA-495-3p functions as a tumor suppressor by regulating multiple epigenetic modifiers in gastric carcinogenesis. J Pathol 2017; 244:107-119. [PMID: 28991363 DOI: 10.1002/path.4994] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 08/18/2017] [Accepted: 10/03/2017] [Indexed: 02/06/2023]
Abstract
MicroRNAs (miRNAs) engage in complex interactions with the machinery that controls the transcriptome and concurrently target multiple mRNAs. Here, we demonstrate that microRNA-495-3p (miR-495-3p) functions as a potent tumor suppressor by governing ten oncogenic epigenetic modifiers (EMs) in gastric carcinogenesis. From the large cohort transcriptome datasets of gastric cancer (GC) patients available from The Cancer Genome Atlas (TCGA) and the National Center for Biotechnology Information (NCBI) Gene Expression Omnibus (GEO), we were able to recapitulate 15 EMs as significantly overexpressed in GC among the 51 EMs that were previously reported to be involved in cancer progression. Computational target prediction yielded miR-495-3p, which targets as many as ten of the 15 candidate oncogenic EMs. Ectopic expression of miRNA mimics in GC cells caused miR-495-3p to suppress ten EMs, and inhibited tumor cell growth and proliferation via caspase-dependent and caspase-independent cell death processing. In addition, in vitro metastasis assays showed that miR-495-3p plays a role in the metastatic behavior of GC cells by regulating SLUG, vimentin, and N-cadherin. Furthermore, treatment of GC cells with 5-aza-2'-deoxcytidine restored miR-495-3p expression; sequence analysis revealed hypermethylation of the miR-495-3p promoter region in GC cells. A negative regulatory loop is proposed, whereby DNMT1, among ten oncogenic EMs, regulates miR-495-3p expression via hypermethylation of the miR-495-3p promoter. Our findings suggest that the functional loss or suppression of miR-495-3p triggers overexpression of multiple oncogenic EMs, and thereby contributes to malignant transformation and growth of gastric epithelial cells. Copyright © 2017 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Jung Woo Eun
- Laboratory of Oncogenomics, Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Functional RNomics Research Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hyung Seok Kim
- Laboratory of Oncogenomics, Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Functional RNomics Research Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Qingyu Shen
- Laboratory of Oncogenomics, Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Functional RNomics Research Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hee Doo Yang
- Laboratory of Oncogenomics, Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Functional RNomics Research Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sang Yean Kim
- Laboratory of Oncogenomics, Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Functional RNomics Research Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jung Hwan Yoon
- Laboratory of Oncogenomics, Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Functional RNomics Research Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Won Sang Park
- Laboratory of Oncogenomics, Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Functional RNomics Research Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jung Young Lee
- Laboratory of Oncogenomics, Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Functional RNomics Research Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Suk Woo Nam
- Laboratory of Oncogenomics, Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Functional RNomics Research Center, The Catholic University of Korea, Seoul, Republic of Korea.,Cancer Evolution Research Center, The Catholic University of Korea, Seoul, Republic of Korea
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12
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MicroRNA in gastrointestinal cell signalling. Inflammopharmacology 2017; 26:1-14. [PMID: 29110118 DOI: 10.1007/s10787-017-0414-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 10/28/2017] [Indexed: 12/17/2022]
Abstract
Our gut forms an important organ and its formation, functioning and homeostasis are maintained by several factors including cell signalling pathways and commensal microflora. These factors affect pathological, physiological and immunological parameters to maintain gut health and prevent its inflammation. Among these, different intracellular signalling pathways play an important role in regulating gut homeostasis. These pathways are in turn regulated by various microRNAs that play a key role in maintaining the balance between tolerance and inflammation. This review highlights the importance of various cell signalling pathways in modulating gut homeostasis and the role specific miRNAs play in their regulation.
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Liu X, Zhang X, Zhang Z, Chang J, Wang Z, Wu Z, Wang C, Sun Z, Ge X, Geng R, Tang W, Dai C, Lin Y, Lin F, Sun M, Jia W, Xue W, Ji J, Hu Y, Qin G, Li J. Plasma microRNA-based signatures to predict 3-year postoperative recurrence risk for stage II and III gastric cancer. Int J Cancer 2017; 141:2093-2102. [PMID: 28722210 DOI: 10.1002/ijc.30895] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 07/03/2017] [Accepted: 07/07/2017] [Indexed: 12/19/2022]
Abstract
Our aim was to identify plasma microRNA (miRNA)-based signatures to predict 3-year postoperative recurrence risk for patients with stage II and III gastric cancer (GC), so as to provide insights for individualized adjuvant therapy. Plasma miRNA expression was investigated in three phases, involving 407 patients recruited from three centers. ABI miRNA microarray and TaqMan Low Density Array were adopted in the discovery phase to identify potential miRNAs. Quantitative reverse-transcriptase polymerase chain reaction was used to assess the expression of selected miRNAs. Logistic regression models were constructed in the training set (n = 170) and validated in the validation set (n = 169). Receiver operating characteristic analyses, survival analyses and subgroup analyses were further used to assess the accuracy of the models. We identified a 7 miRNA classifier and 7miR + pathological factors index that provided high predictive accuracy of GC recurrence (area under the curve = 0.725 and 0.841 in the training set; and 0.627 and 0.771 in the validation set). High-risk patients defined by the signatures had significantly shorter disease-free survival and overall survival than low-risk patients. The 7 miRNA classifier is an independent prognostic factor, and could add predictive value to traditional prognostic factors. Subgroup analyses revealed the satisfactory performance persisted regardless of stage, and the two models both displayed high accuracy in stage IIA patients. In conclusion, identified microRNA signature may potentially provide some additional benefit for prediction of disease recurrence in patients with stage II and III GC.
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Affiliation(s)
- Xinyang Liu
- Fudan University Zhongshan Hospital, Shanghai, People's Republic of China.,Harvard T. H. Chan School of Public Health, Boston, MA
| | - Xiaowei Zhang
- Department of Medical Oncology, Fudan University Cancer Hospital, Shanghai, People's Republic of China
| | - Zhe Zhang
- Department of Medical Oncology, Fudan University Cancer Hospital, Shanghai, People's Republic of China
| | - Jinjia Chang
- Department of Medical Oncology, Fudan University Cancer Hospital, Shanghai, People's Republic of China
| | - Zhichao Wang
- Fudan University Zhongshan Hospital, Shanghai, People's Republic of China
| | - Zheng Wu
- Shanghai Jiaotong University Ruijin Hospital, Shanghai, People's Republic of China
| | - Chenchen Wang
- Department of Medical Oncology, Fudan University Cancer Hospital, Shanghai, People's Republic of China
| | - Zuojun Sun
- Shanghai Jiaotong University Renji Hospital, Shanghai, People's Republic of China
| | - Xiaoxiao Ge
- Beijing Union Hospital, Beijing, People's Republic of China
| | - Ruixuan Geng
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Wenbo Tang
- Department of Medical Oncology, Fudan University Cancer Hospital, Shanghai, People's Republic of China
| | - Congqi Dai
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Ying Lin
- Department of Medical Oncology, Fudan University Cancer Hospital, Shanghai, People's Republic of China
| | - Fengjuan Lin
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Menghong Sun
- Tissue Bank, Department of Pathology, Fudan University Cancer Hospital, Shanghai, People's Republic of China
| | - Weihua Jia
- Sun Yat-Sen University Cancer Center, Guangzhou, People's Republic of China
| | - Wenqiong Xue
- Sun Yat-Sen University Cancer Center, Guangzhou, People's Republic of China
| | - Jiafu Ji
- Beijing Cancer Hospital and Institute, Beijing, People's Republic of China
| | - Ying Hu
- Beijing Cancer Hospital and Institute, Beijing, People's Republic of China
| | - Guoyou Qin
- Department of Biostatistics, School of Public Health, Fudan University, Shanghai, People's Republic of China
| | - Jin Li
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
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Labib HA, Elantouny NG, Ibrahim NF, Alnagar AA. Upregulation of microRNA-21 is a poor prognostic marker in patients with childhood B cell acute lymphoblastic leukemia. Hematology 2017; 22:392-397. [DOI: 10.1080/10245332.2017.1292204] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
| | - Neveen G. Elantouny
- Internal Medicine Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Nevin F. Ibrahim
- Internal Medicine Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Ahmed A. Alnagar
- Medical Oncology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
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Rath SN, Das D, Konkimalla VB, Pradhan SK. In Silico Study of miRNA Based Gene Regulation, Involved in Solid Cancer, by the Assistance of Argonaute Protein. Genomics Inform 2016; 14:112-124. [PMID: 27729841 PMCID: PMC5056896 DOI: 10.5808/gi.2016.14.3.112] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 08/02/2016] [Accepted: 08/09/2016] [Indexed: 02/06/2023] Open
Abstract
Solid tumor is generally observed in tissues of epithelial or endothelial cells of lung, breast, prostate, pancreases, colorectal, stomach, and bladder, where several genes transcription is regulated by the microRNAs (miRNAs). Argonaute (AGO) protein is a family of protein which assists in miRNAs to bind with mRNAs of the target genes. Hence, study of the binding mechanism between AGO protein and miRNAs, and also with miRNAs-mRNAs duplex is crucial for understanding the RNA silencing mechanism. In the current work, 64 genes and 23 miRNAs have been selected from literatures, whose deregulation is well established in seven types of solid cancer like lung, breast, prostate, pancreases, colorectal, stomach, and bladder cancer. In silico study reveals, miRNAs namely, miR-106a, miR-21, and miR-29b-2 have a strong binding affinity towards PTEN, TGFBR2, and VEGFA genes, respectively, suggested as important factors in RNA silencing mechanism. Furthermore, interaction between AGO protein (PDB ID-3F73, chain A) with selected miRNAs and with miRNAs-mRNAs duplex were studied computationally to understand their binding at molecular level. The residual interaction and hydrogen bonding are inspected in Discovery Studio 3.5 suites. The current investigation throws light on understanding miRNAs based gene silencing mechanism in solid cancer.
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Affiliation(s)
- Surya Narayan Rath
- BIF Centre, Department of Bioinformatics, Orissa University of Agriculture & Technology, Bhubaneswar 751003, India
| | - Debasrita Das
- BIF Centre, Department of Bioinformatics, Orissa University of Agriculture & Technology, Bhubaneswar 751003, India
| | - V Badireenath Konkimalla
- School of Biological Sciences, National Institute of Science Education and Research, Bhubaneswar 751005, India
| | - Sukanta Kumar Pradhan
- BIF Centre, Department of Bioinformatics, Orissa University of Agriculture & Technology, Bhubaneswar 751003, India
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Saeidimehr S, Ebrahimi A, Saki N, Goodarzi P, Rahim F. MicroRNA-Based Linkage between Aging and Cancer: from Epigenetics View Point. CELL JOURNAL 2016; 18:117-26. [PMID: 27540517 PMCID: PMC4988411 DOI: 10.22074/cellj.2016.4303] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Accepted: 10/01/2015] [Indexed: 02/01/2023]
Abstract
Ageing is a complex process and a broad spectrum of physical, psychological, and
social changes over time. Accompanying diseases and disabilities, which can interfere
with cancer treatment and recovery, occur in old ages. MicroRNAs (miRNAs) are a
set of small non-coding RNAs, which have considerable roles in post-transcriptional
regulation at gene expression level. In this review, we attempted to summarize the current knowledge of miRNAs functions in ageing, with mainly focuses on malignancies
and all underlying genetic, molecular and epigenetics mechanisms. The evidences indicated the complex and dynamic nature of miRNA-based linkage of ageing and cancer
at genomics and epigenomics levels which might be generally crucial for understanding
the mechanisms of age-related cancer and ageing. Recently in the field of cancer and
ageing, scientists claimed that uric acid can be used to regulate reactive oxygen species (ROS), leading to cancer and ageing prevention; these findings highlight the role of
miRNA-based inhibition of the SLC2A9 antioxidant pathway in cancer, as a novel way to
kill malignant cells, while a patient is fighting with cancer.
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Affiliation(s)
| | - Ammar Ebrahimi
- Department of Medical Biotechnology, School of Advanced Medical Technology, Tehran University of Medical Sciences, Tehran, Iran
| | - Najmaldin Saki
- Health Research Institute, Thalassemia and Hemoglobinopathy Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Parisa Goodarzi
- School of Nursing and Midwifery, Iran University of Medical Sciences, Tehran, Iran
| | - Fakher Rahim
- Health Research Institute, Thalassemia and Hemoglobinopathy Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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Fawzy MS, Hussein MH, Abdelaziz EZ, Yamany HA, Ismail HM, Toraih EA. Association of MicroRNA-196a2 Variant with Response to Short-Acting β2-Agonist in COPD: An Egyptian Pilot Study. PLoS One 2016; 11:e0152834. [PMID: 27043015 PMCID: PMC4820109 DOI: 10.1371/journal.pone.0152834] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 03/01/2016] [Indexed: 12/17/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a multifactorial chronic respiratory disease, characterized by an obstructive pattern. Understanding the genetic predisposition of COPD is essential to develop personalized treatment regimens. MicroRNAs (miRNAs) are small, endogenous, non-coding RNAs that modulate the expression levels of specific proteins based on sequence complementarity with their target mRNA molecules. Emerging evidences demonstrated the potential use of miRNAs as a disease biomarker. This pilot study aimed to investigate the association of the MIR-196a2 rs11614913 (C/T) polymorphism with COPD susceptibility, the clinical outcome and bronchodilator response to short-acting β2-agonist. Genotyping of rs11614913 polymorphism was determined in 108 COPD male patients and 116 unrelated controls using real-time polymerase chain reaction technology. In silico target prediction and network core analysis were performed. COPD patients did not show significant differences in the genotype distribution (p = 0.415) and allele frequencies (p = 0.306) of the studied miRNA when compared with controls. There were also no associations with GOLD stage, dyspnea grade, disease exacerbations, COPD assessment test for estimating impact on health status score, or the frequency of intensive care unit admission. However, COPD patients with CC genotype corresponded to the smallest bronchodilator response after Salbutamol inhalation, the heterozygotes (CT) had an intermediate response, while those with the TT genotype showed the highest response (p < 0.001). In conclusion MIR-196a2 rs11614913 polymorphism is associated with the bronchodilator response of COPD in our sample of the Egyptian population, generating hypothesis of the potential use of MIR-196a2 variant as a pharmacogenetic marker for COPD.
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Affiliation(s)
- Manal S. Fawzy
- Department of Medical Biochemistry, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
- * E-mail: (EAT); (MSF)
| | - Mohammad H. Hussein
- Department of Chest Diseases, Faculty of Medicine, Cairo University, Giza, Egypt
| | - Eman Z. Abdelaziz
- Department of Pharmacology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Hussain A. Yamany
- Department of Medicine, College of Medicine, Taibah University, Almadinah Almunawwarah, Kingdom of Saudi Arabia
| | - Hussein M. Ismail
- Department of Medicine, College of Medicine, Taibah University, Almadinah Almunawwarah, Kingdom of Saudi Arabia
- Department of Cardiology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Eman A. Toraih
- Department of Histology and Cell Biology (Genetics Unit), Faculty of Medicine, Suez Canal University, Ismailia, Egypt
- * E-mail: (EAT); (MSF)
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Toraih EA, Mohammed EA, Farrag S, Ramsis N, Hosny S. Pilot Study of Serum MicroRNA-21 as a Diagnostic and Prognostic Biomarker in Egyptian Breast Cancer Patients. Mol Diagn Ther 2016; 19:179-90. [PMID: 26063582 DOI: 10.1007/s40291-015-0143-6] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND MicroRNAs are small RNA molecules that bind to complementary sequences of target messenger RNAs and down-regulate their translation to protein or degrade them. MicroRNAs play critical roles in many different cellular processes. Hence, aberrant microRNA expression is common in a variety of disorders, including cancer. PATIENTS AND METHODS In this work, we quantified serum microRNA-21 (miR-21) expression levels in 30 breast cancer patients, 30 cancer-free individuals with risk factors for developing breast cancer, and another 30 controls without risk factors, in order to test the role of miR-21 as a possible diagnostic and prognostic biomarker in breast cancer. RESULTS Our results indicated that miR-21 expression was elevated in asymptomatic high-risk individuals (2.98-fold) compared with healthy non-risk controls (p < 0.001), and was increased in almost all sera of cancer patients (12.72-fold) compared with healthy controls (p < 0.001). Higher levels of serum miR-21 were also correlated with tumors of higher grades, more nodal involvement, distal metastasis and advanced clinical stages (p < 0.01). Furthermore, over-expression levels declined towards normal after surgical tumor resection (p < 0.001). CONCLUSION In conclusion, our findings demonstrate that serum miR-21 expression profile may serve as a potential non-invasive diagnostic and prognostic biomarker for breast cancer.
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Affiliation(s)
- Eman A Toraih
- Genetics Unit, Department of Histology and Cell Biology, Faculty of Medicine, Suez Canal University, Circular Road, Ismailia, 41522, Egypt,
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Zhuang K, Han K, Tang H, Yin X, Zhang J, Zhang X, Zhang L. Up-Regulation of Plasma miR-23b is Associated with Poor Prognosis of Gastric Cancer. Med Sci Monit 2016; 22:356-61. [PMID: 26835790 PMCID: PMC4745659 DOI: 10.12659/msm.895428] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Gastric cancer (GC) is a common malignant disease and microRNAs (miRNAs) have been shown to play important roles in GC tumorigenesis. As the clinical outcome of GC is closely correlated with the clinical stage at the time of diagnosis, early detection and prevention are crucial. This study was designed to evaluate the expression level of plasma miR-23b in patients with GC and investigate the relationship between plasma miR-23b expression level and the prognosis of GC. MATERIAL/METHODS We recruited 138 patients diagnosed with GC and 50 healthy volunteers. Quantitative real-time PCR (qRT-PCR) was performed to evaluate the expression level of plasma miR-23b in all participants. The association between miR-23b expression and clinicopathological factors as well as survival rates was analyzed. Receiver operator curve (ROC) analysis was carried out to evaluate the diagnostic performance of plasma miR-23b for GC.Univariate and multivariate Cox regression analyses were conducted to determine whether plasma miR-23b was an independent predictor of survival. RESULTS The expression levels of miR-23b were upregulated in plasma samples from GC patients (P<0.01) and were significantly associated with T stage, distant metastasis, and differentiation. Significantly shorter 5-year overall survival (OS) and disease-free survival (DFS) were observed in patients with higher expression of the miR-23b (P<0.01). The area under the curve (AUC) of high expression of plasma miR-23b to diagnose GC was 0.80 (95% CI: 0.74-0.86, P<0.001). Multivariate analysis revealed that enhanced expression of plasma miR-23b was an independent predictor of OS (P=0.015) and DFS (P=0.004). CONCLUSIONS Our results indicated that plasma miR-23b was overexpressed in GC patients and high plasma miR-23b expression was associated with poor clinical outcome. Thus, plasma miR-23b may serve as a potential diagnostic biomarker and therapeutic target for GC.
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Affiliation(s)
- Kun Zhuang
- Division of Gastroenterology, The Second Affiliated Hospital Xi'an Jiaotong University, Xi'an, Shaanxi, China (mainland)
| | - Kun Han
- Division of Gastroenterology, Xi'an Central Hospital, Xi'an, Shaanxi, China (mainland)
| | - Hailing Tang
- Division of Gastroenterology, Xi'an Central Hospital, Xi'an, Shaanxi, China (mainland)
| | - Xiaoran Yin
- Division of Gastroenterology, The Second Affiliated Hospital Xi'an Jiaotong University, Xi'an, Shaanxi, China (mainland)
| | - Jun Zhang
- Division of Gastroenterology, The Second Affiliated Hospital Xi'an Jiaotong University, Xi'an, Shaanxi, China (mainland)
| | - Xin Zhang
- Division of Gastroenterology, The Second Affiliated Hospital Xi'an Jiaotong University, Xi'an, Shaanxi, China (mainland)
| | - Lingxia Zhang
- Division of Gastroenterology, The Second Affiliated Hospital Xi'an Jiaotong University, Xi'an, Shaanxi, China (mainland)
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Jiang L, Lin T, Xu C, Hu S, Pan Y, Jin R. miR-124 interacts with the Notch1 signalling pathway and has therapeutic potential against gastric cancer. J Cell Mol Med 2015; 20:313-22. [PMID: 26612211 PMCID: PMC4727557 DOI: 10.1111/jcmm.12724] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 09/28/2015] [Indexed: 12/11/2022] Open
Abstract
Aberrant Notch signalling plays an important role in cancer progression. However, little is known about the interaction between miRNA and the Notch signalling pathway and its role in gastric cancer (GC). In this study, we found that miR‐124 was down‐regulated in GC compared with adjacent normal tissue. Forced expression of miR‐124 inhibited GC cell growth, migration and invasion, and induced cell cycle arrest. miR‐124 negatively regulated Notch1 signalling by targeting JAG1. miR‐124 levels were also shown to be inversely correlated with JAG1 expression in GC. Furthermore, we found that the overexpression of the intracellular domain of Notch1 repressed miR‐124 expression, promoted GC cell growth, migration and invasion. Conversely, blocking Notch1 using a γ‐secretase inhibitor up‐regulated miR‐124 expression, inhibited GC cell growth, migration and invasion. In conclusion, our data demonstrates a regulatory feedback loop between miR‐124 and Notch1 signalling in GC cells, suggesting that the miR‐124/Notch axis may be a potential therapeutic target against GC.
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Affiliation(s)
- Lei Jiang
- Central Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Tiesu Lin
- Department of Gastroenterology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Chaochao Xu
- Department of Gastroenterology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Sunkuan Hu
- Department of Gastroenterology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yangyang Pan
- Department of Gastroenterology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Rong Jin
- Department of Gastroenterology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.,Department of Epidemiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
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Abstract
Cancer cachexia is a paraneoplastic syndrome compromising quality of life and survival, mainly characterized by involuntary weight loss, fatigue, and systemic inflammation. The syndrome is described as a result of tumor-host interactions characterized by an inflammatory response by the host to the presence of the tumor. Indeed, systemic inflammation is considered a pivotal feature in cachexia progression and maintenance. Cytokines are intimately related to chronic systemic inflammation and the mechanisms underlying the release of these factors are not totally elucidated, the etiology of cachexia being still not fully understood. Therefore, the understanding of cachexia-related mechanisms, as well as the establishment of markers for the syndrome, is very relevant. MicroRNAs (miRNAs) are a class of noncoding RNAs interfering with gene regulation. Different miRNA expression profiles are associated with different diseases and inflammatory processes. miRNAs modulate adipose and skeletal muscle tissue metabolism in cancer cachexia and also tumor and tissue derived inflammation. Therefore, we propose a possible role for miRNAs in the modulation of the host inflammatory response during cachexia. Moreover, the establishment of a robust body of evidence in regard to miRNAs and the mechanisms underlying cachexia is mandatory, and shall contribute to the improvement of its diagnosis and treatment.
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Hou X, Zhang M, Qiao H. Diagnostic significance of miR-106a in gastric cancer. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2015; 8:13096-13101. [PMID: 26722506 PMCID: PMC4680451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 09/25/2015] [Indexed: 06/05/2023]
Abstract
As one of the most common malignant tumors, gastric cancer still lacks tumor markers with enough specificity and sensitivity. Therefore the development of novel tumor markers is necessary for early diagnosis in clinics. MicroRNA (miR) has been known to be of unique expressional patterns in various tumors and may work as potential tumor markers for clinical use. This study thus explored the significance of plasma miR-106a in clinical diagnosis of gastric cancer and its effects on proliferation of cancer cells. Plasma miR-106a levels were quantified by real-time quantitative fluorescent PCR methods in 80 cases of gastric cancer patients and healthy individuals to analyze the correlation between miR-106a and clinical features. MiR-106 inhibitor was further transfected into human gastric carcinoma cells for further cell proliferation using CCK-8 approach. MiR-106a was significantly up-regulated in gastric cancer patient plasma samples compared to healthy individuals (P<0.01). The area under ROC curve was 0.895 (95% CI: 0.846~0.943). It has a specificity of 93.8% and a sensitivity of 77.5% in diagnosing gastric cancer. MiR-106a level was also correlated with cancer differentiation stage, lymph node metastasis, TNM stage and tumor size (P<0.05). The down-regulation of miR-106 in gastric carcinoma cells inhibited cell proliferation (P<0.05). MiR-106a was significantly up-regulated in gastric cancer patients and can facilitate the in vitro proliferation of tumor cells. It may work as a biological marker for gastric cancer.
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Affiliation(s)
- Xu Hou
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical UniversityHarbin 150001, Heilongjiang Province, China
| | - Miao Zhang
- Department of General Surgery, The Heilongjiang Provincial HospitalHarbin 150001, Heilongjiang Province, China
| | - Haiquan Qiao
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical UniversityHarbin 150001, Heilongjiang Province, China
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Mu YP, Tang S, Sun WJ, Gao WM, Wang M, Su XL. Association of miR-193b down-regulation and miR-196a up-regulation with clinicopathological features and prognosis in gastric cancer. Asian Pac J Cancer Prev 2015; 15:8893-900. [PMID: 25374225 DOI: 10.7314/apjcp.2014.15.20.8893] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Dysregulated expression of microRNAs (miRNAs) has been shown to be closely associated with tumor development, progression, and carcinogenesis. However, their clinical implications for gastric cancer remain elusive. To investigate the hypothesis that genome-wide alternations of miRNAs differentiate gastric cancer tissues from those matched adjacent non-tumor tissues (ANTTs), miRNA arrays were employed to examine miRNA expression profiles for the 5-pair discovery stage, and the quantitative real-time polymerase chain reaction (qRT- PCR) was applied to validate candidate miRNAs for 48-pair validation stage. Furthermore, the relationship between altered miRNA and clinicopathological features and prognosis of gastric cancer was explored. Among a total of 1,146 miRNAs analyzed, 16 miRNAs were found to be significantly different expressed in tissues from gastric cancer compared to ANTTs (p<0.05). qRT-PCR further confirmed the variation in expression of miR-193b and miR-196a in the validation stage. Down-expression of miR-193b was significantly correlated with Lauren type, differentiation, UICC stage, invasion, and metastasis of gastric cancer (p<0.05), while over-expression of miR-196a was significantly associated with poor differentiation (p=0.022). Moreover, binary logistic regression analysis demonstrated that the UICC stage was a significant risk factor for down-expression of miR-193b (adjusted OR=8.69; 95%CI=1.06-56.91; p=0.043). Additionally, Kaplan-Meier survival curves indicated that patients with a high fold-change of down-regulated miR-193b had a significantly shorter survival time (n=19; median survival=29 months) compared to patients with a low fold-change of down-regulated miR-193b (n=29; median survival=54 months) (p=0.001). Overall survival time of patients with a low fold-change of up-regulated miR- 196a (n=27; median survival=52 months) was significantly longer than that of patients with a high fold-change of up-regulated miR-196a (n=21; median survival=46 months) (p=0.003). Hence, miR-193b and miR-196a may be applied as novel and promising prognostic markers in gastric cancer.
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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, China E-mail : ;
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Keshavarz M, Behpour M, Rafiee-pour HA. Recent trends in electrochemical microRNA biosensors for early detection of cancer. RSC Adv 2015. [DOI: 10.1039/c5ra01726b] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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Zhang Y, Qiu L, Wang Y, He C, Qin X, Liu Y, Li Z. Unsaturated free fatty acids: a potential biomarker panel for early detection of gastric cancer. Biomarkers 2014; 19:667-73. [PMID: 25355065 DOI: 10.3109/1354750x.2014.977951] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Changes in the levels of free fatty acids (FFAs) are closely associated with physiological status. Serum levels of C16:1, C18:3, C18:2, C18:1, C20:4, and C22:6 in 164 gastric cancer (GC) patients and 111 benign gastric disease (BGD) patients were significantly decreased compared with 252 healthy controls. Receiver operating characteristic analysis showed that the biomarker panel including C16:1, C18:3, C18:2, C20:4, and C22:6 presents a high diagnostic ability to differentiate early-stage GC patients from healthy controls plus BGD patients, with a sensitivity of 80.6% and a specificity of 72.7%.
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Affiliation(s)
- Yaping Zhang
- Department of Biophysics and Structural Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & School of Basic Medicine, Peking Union Medical College , Beijing , China
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Pinheiro DDR, Ferreira WAS, Barros MBL, Araújo MD, Rodrigues-Antunes S, Borges BDN. Perspectives on new biomarkers in gastric cancer: Diagnostic and prognostic applications. World J Gastroenterol 2014; 20:11574-11585. [PMID: 25206265 PMCID: PMC4155351 DOI: 10.3748/wjg.v20.i33.11574] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Revised: 03/14/2014] [Accepted: 05/05/2014] [Indexed: 02/06/2023] Open
Abstract
Gastric cancer is considered one of the most deadly tumors worldwide. Even with the decline in its incidence, the mortality rate of this disease has remained high, mainly due to its late diagnosis and to the lack of precise prognostic markers. The main purpose of this review is to present genetic, epigenetic and proteomic molecular markers that may be used in a diagnostic and prognostic manner and to discuss the pros and cons of each type of marker for improving clinical practice. In this sense, we observed that the use of genetic markers, especially mutations and polymorphisms, should be carefully considered, as they are strongly affected by ethnicity. Proteomic-based markers show promise, but the higher costs of the associated techniques continue to make this approach expensive for routine use. Alternatively, epigenetic markers appear to be very promising, as they can be detected in bodily fluids as well as tissues. However, such markers must be used carefully because epigenetic changes may occur due to environmental factors and aging. Despite the advances in technology and its access, to date, there are few defined biomarkers of prognostic and diagnostic use for gastric tumors. Therefore, the use of a panel of several approaches (genetic, epigenetic and proteomic) should be considered the best alternative for clinical practice.
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Sturchio E, Colombo T, Boccia P, Carucci N, Meconi C, Minoia C, Macino G. Arsenic exposure triggers a shift in microRNA expression. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 472:672-80. [PMID: 24317173 DOI: 10.1016/j.scitotenv.2013.11.092] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 11/07/2013] [Accepted: 11/18/2013] [Indexed: 05/24/2023]
Abstract
Exposure to inorganic Arsenic (iAs) through drinking water is a major public health problem affecting most countries. iAs has been classified by the International Agency for Research on Cancer as Group 1: "Carcinogenic to humans". Although numerous studies have shown the related adverse effects of iAs, sensitive appropriate biomarkers for studies of environmental epidemiology are still required. The present work aims at investigate the role of microRNAs (miRNAs), powerful negative regulators of gene expression, playing a key role in many physiological and pathological cellular processes, in iAs exposure. To this end, we analyzed miRNA changes in expression profile triggered by iAs exposure in Jurkat cell line. We used microarray technology to profile the expression of miRNAs following 2 μmol/L sodium arsenite treatment at different time points. Moreover, we performed phenotypic analysis of iAs treated cells. Real Time Polymerase Chain Reaction (RT-PCR) was used to validate miRNA microarray data and to assay expression modulation of selected relevant mRNAs. Finally, bioinformatics techniques were applied to reconstruct iAs-relevant molecular pathways and miRNA regulatory networks from the expression data. We report miRNAs modulated after iAs treatment in Jurkat cells. In particular, we highlight 36 miRNAs exhibiting consistent dysregulation and particularly a panel of 8 miRNAs which we also validated by RT-PCR analysis. Computational analysis of lists of putative target genes for these 8 miRNAs points to an involvement in arsenic-response pathways, for a subset of them, that were analyzed by RT-PCR. Furthermore, iAs exposure reveals induction of cell cycle progression and the failure of apoptosis, supporting the idea of iAs carcinogenic activity. Our study provides a list of miRNAs whose expression levels are affected by iAs treatment, corroborating the importance of proceeding with the hunt for specific subset of miRNAs, which can serve as potential biomarkers of iAs effects with useful diagnostic value.
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Affiliation(s)
- Elena Sturchio
- Italian Workers' Compensation Authority (INAIL), Department of Production Plants and Anthropic Settlements (DIPIA) Via Alessandria, 220/E, 00198 Rome, Italy.
| | - Teresa Colombo
- University of Rome "La Sapienza"-BCE, Viale del Policlinico 155, 00161, Rome, Italy
| | - Priscilla Boccia
- Italian Workers' Compensation Authority (INAIL), Department of Production Plants and Anthropic Settlements (DIPIA) Via Alessandria, 220/E, 00198 Rome, Italy
| | - Nicoletta Carucci
- University of Rome "La Sapienza"-BCE, Viale del Policlinico 155, 00161, Rome, Italy
| | - Claudia Meconi
- Italian Workers' Compensation Authority (INAIL), Department of Production Plants and Anthropic Settlements (DIPIA) Via Alessandria, 220/E, 00198 Rome, Italy
| | - Claudio Minoia
- Laboratory for Environmental and Toxicological Measurements, IRCCS Pavia, S. Maugeri Foundation, Via S. Maugeri, 8, 27100, Pavia, Italy
| | - Giuseppe Macino
- University of Rome "La Sapienza"-BCE, Viale del Policlinico 155, 00161, Rome, Italy
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Stein M, Ruggiero P, Rappuoli R, Bagnoli F. Helicobacter pylori CagA: From Pathogenic Mechanisms to Its Use as an Anti-Cancer Vaccine. Front Immunol 2013; 4:328. [PMID: 24133496 PMCID: PMC3796731 DOI: 10.3389/fimmu.2013.00328] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 09/25/2013] [Indexed: 02/06/2023] Open
Abstract
Helicobacter pylori colonizes the gastric mucosa of more than 50% of the human population, causing chronic inflammation, which however is largely asymptomatic. Nevertheless, H. pylori-infected subjects can develop chronic gastritis, peptic ulcer, gastric mucosa-associated lymphoid tissue lymphoma, and gastric cancer. Chronic exposure to the pathogen and its ability to induce epithelial to mesenchymal transition (EMT) through the injection of cytotoxin-associated gene A into gastric epithelial cells may be key triggers of carcinogenesis. By deregulating cell-cell and cell-matrix interactions as well as DNA methylation, histone modifications, expression of micro RNAs, and resistance to apoptosis, EMT can actively contribute to early stages of the cancer formation. Host response to the infection significantly contributes to disease development and the concomitance of particular genotypes of both pathogen and host may turn into the most severe outcomes. T regulatory cells (Treg) have been recently demonstrated to play an important role in H. pylori-related disease development and at the same time the Treg-induced tolerance has been proposed as a possible mechanism that leads to less severe disease. Efficacy of antibiotic therapies of H. pylori infection has significantly dropped. Unfortunately, no vaccine against H. pylori is currently licensed, and protective immunity mechanisms against H. pylori are only partially understood. In spite of promising results obtained in animal models of infection with a number of vaccine candidates, few clinical trials have been conducted so far and with no satisfactory outcomes. However, prophylactic vaccination may be the only means to efficiently prevent H. pylori-associated cancers.
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Affiliation(s)
- Markus Stein
- Albany College of Pharmacy and Health Sciences, Albany, NY, USA
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Abstract
The development of gastric adenocarcinoma is a complex multistep process involving multiple genetic alterations. Based on pathology, four different macroscopic types and at least two major histological types, intestinal and diffuse, have been described. Most gastric cancer (GC) show genetic instability, either microsatellite instability or chromosomal instability, which is considered an early event in gastric carcinogenesis. Molecular studies of alterations of single genes have provided evidence that intestinal and diffuse type GC evolve via different genetic pathways. Recent results from high-throughput whole-genome expression or copy number studies have demonstrated extensive genetic diversity between cases and within individual GC. Sets of commonly up- or downregulated microRNAs have been identified in GC and might be useful in the near future to identify pathways of GC progression. Results from detailed molecular and/or pathological GC studies, although promising, still have limited clinical utility in predicting survival and stratifying GC patients for appropriate treatment.
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Affiliation(s)
- Heike I Grabsch
- Leeds Institute of Cancer and Pathology, University of Leeds, Leeds LS9 7TF, UK.
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Tang H, Kong Y, Guo J, Tang Y, Xie X, Yang L, Su Q, Xie X. Diallyl disulfide suppresses proliferation and induces apoptosis in human gastric cancer through Wnt-1 signaling pathway by up-regulation of miR-200b and miR-22. Cancer Lett 2013; 340:72-81. [PMID: 23851184 DOI: 10.1016/j.canlet.2013.06.027] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 05/30/2013] [Accepted: 06/24/2013] [Indexed: 01/12/2023]
Abstract
The purpose of this study was to identify a mechanism related to miRNA pathway which plays a role in the anti-tumor effects of Diallyl disulfide. Alterations in miRNA expression were observed in Diallyl disulfide-treated MGC-803 cells, including up-regulation of miR-200b and miR-22 expression. Furthermore, Wnt-1 was identified as a target of both miR-200b and miR-22. MiR-200b and miR-22 not only synergistically inhibited gastric cancer growth, but also enhanced the antitumor effect of Diallyl disulfide both in vitro and in vivo. It indicated that miR-200b and miR-22 may serve as potential gene therapy and enhance Diallyl disulfide antitumor effects.
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Affiliation(s)
- Hailin Tang
- Department of Breast Oncology, Sun Yat-Sen University Cancer Center, Guangzhou, Guangdong, People's Republic of China; State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, Guangdong, People's Republic of China; Cancer Research Institute, University of South China, Hengyang, Hunan, People's Republic of China
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Zhang L, Wang X, Chen P. MiR-204 down regulates SIRT1 and reverts SIRT1-induced epithelial-mesenchymal transition, anoikis resistance and invasion in gastric cancer cells. BMC Cancer 2013; 13:290. [PMID: 23768087 PMCID: PMC3710153 DOI: 10.1186/1471-2407-13-290] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 06/05/2013] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Our previous studies showed that SIRT1 was over-expressed in gastric cancer specimens and related with lymph node metastasis. However, the mechanism of SIRT1 up-regulation and its association with metastasis in gastric cancer remain unclear. The present study was undertaken to understand the role of microRNA in regulation of SIRT1 in the progression of gastric cancer. METHODS Expression of miR-204 and SIRT1 was assessed in two gastric cancer cell lines and 24 matched cancer specimens. Luciferase reporter assay was carried to verify that miR-204 targeting SIRT1. Cell invasion ability of AGS and BGC was detected by transwell invasion assay. Annexin V/PI assay was used to investigate the cell sensitivity of anoikis. Western blot analysis to assess SIRT1, Vimentin, E-Cadherin, LKB1, and β-actin expression was performed in gastic cancer cell lines. RESULTS SIRT1 was defined as the target gene and elucidated the biological functions of miR-204 with a luciferase reporter assay and Western blot analysis. We verified that miR-204 levels were down-regulated and significantly associated with the up-regulation of SIRT1 mRNA levels in gastric cancer specimens. Over-expression of miR-204 reduced cell invasion and anoikis resistance in gastric cancer cells. Up-regulation of miR-204 influenced the levels of the epithelial mesenchymal transition (EMT)-associated genes, increasing E-cadherin levels and decreasing Vimentin levels. We demonstrated that the regulation of EMT by miR-204 involves cooperation with LKB1. Furthermore, silencing of SIRT1 phenocopied the effects of miR-204 in gastric cancer cells. These data demonstrate that miR-204 plays an important role in regulating metastasis of gastric cancer, which is involved in post-transcriptional repression of SIRT1. CONCLUSION Our results suggest that down-regulation of miR-204 promotes gastric cancer cell invasion by activating the SIRT1-LKB1 pathway. These data demonstrate that miR-204 plays an important role in regulating metastasis of gastric cancer, which is involved in post-transcriptional repression of SIRT1.
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Affiliation(s)
- Lihua Zhang
- Department of Pathology, Southeast University, Zhongda Hospital, Nanjing 210009, P R China.
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