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Janiczek-Polewska M, Kolenda T, Poter P, Kozłowska-Masłoń J, Jagiełło I, Regulska K, Malicki J, Marszałek A. Diagnostic Potential of miR-143-5p, miR-143-3p, miR-551b-5p, and miR-574-3p in Chemoresistance of Locally Advanced Gastric Cancer: A Preliminary Study. Int J Mol Sci 2024; 25:8057. [PMID: 39125625 PMCID: PMC11311514 DOI: 10.3390/ijms25158057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2024] [Revised: 07/15/2024] [Accepted: 07/17/2024] [Indexed: 08/12/2024] Open
Abstract
Gastric cancer (GC) is one of the most frequently diagnosed cancers in the world. Although the incidence is decreasing in developed countries, the treatment results are still unsatisfactory. The standard treatment for locally advanced gastric cancer (LAGC) is gastrectomy with perioperative chemotherapy. The association of selected microRNAs (miRNAs) with chemoresistance was assessed using archival material of patients with LAGC. Histological material was obtained from each patient via a biopsy performed during gastroscopy and then after surgery, which was preceded by four cycles of neoadjuvant chemotherapy (NAC) according to the FLOT or FLO regimen. The expression of selected miRNAs in the tissue material was assessed, including miRNA-21-3p, miRNA-21-5p, miRNA-106a-5p, miRNA-122-3p, miRNA-122-5p, miRNA-143-3p, miRNA-143-5p, miRNA-203a-3p, miRNA-203-5p, miRNA-551b-3p, miRNA-551b-5p, and miRNA-574-3p. miRNA expression was assessed using quantitative reverse transcription polymerase chain reaction (qRT-PCR). The response to NAC was assessed using computed tomography of the abdomen and chest and histopathology after gastrectomy. The statistical analyses were performed using GraphPad Prism 9. The significance limit was set at p < 0.05. We showed that the expression of miR-143-3p, miR-143-5p, and miR-574-3p before surgery, and miR-143-5p and miR-574-3p after surgery, decreased in patients with GC. The expression of miR-143-3p, miR-143-5p, miR-203a-3p, and miR-551b-5p decreased in several patients who responded to NAC. The miRNA most commonly expressed in these cases was miRNA-551b-5p. Moreover, it showed expression in a patient whose response to chemotherapy was inconsistent between the histopathological results and computed tomography. The expression of miR-143-3p, miR-143-5p, miR-203a-3p, and miR-551b-5p in formalin-fixed paraffin-embedded tissue (FFPET) samples can help differentiate between the responders and non-responders to NAC in LAGC. miR-143-3p, miR-143-5p, and miR-574-3p expression may be used as a potential diagnostic tool in GC patients. The presence of miR-551b-5p may support the correct assessment of a response to NAC in GC via CT.
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Affiliation(s)
- Marlena Janiczek-Polewska
- Department of Clinical Oncology, Greater Poland Cancer Centre, 61-866 Poznan, Poland
- Department of Electroradiology, Poznan University of Medical Sciences, 61-701 Poznan, Poland
| | - Tomasz Kolenda
- Laboratory of Cancer Genetics, Greater Poland Cancer Centre, 61-866 Poznan, Poland
- Research and Implementation Unit, Greater Poland Cancer Centre, 61-866 Poznan, Poland;
| | - Paulina Poter
- Department of Clinical Pathology, Poznan University of Medical Sciences and Greater Poland Cancer Centre, 61-866 Poznan, Poland
| | - Joanna Kozłowska-Masłoń
- Laboratory of Cancer Genetics, Greater Poland Cancer Centre, 61-866 Poznan, Poland
- Research and Implementation Unit, Greater Poland Cancer Centre, 61-866 Poznan, Poland;
- Institute of Human Biology and Evolution, Faculty of Biology, Adam Mickiewicz University, 61-614 Poznan, Poland
| | - Inga Jagiełło
- Department of Clinical Pathology, Poznan University of Medical Sciences and Greater Poland Cancer Centre, 61-866 Poznan, Poland
| | - Katarzyna Regulska
- Research and Implementation Unit, Greater Poland Cancer Centre, 61-866 Poznan, Poland;
- Pharmacy, Greater Poland Cancer Centre, 61-866 Poznan, Poland
- Department of Clinical Pharmacy and Biopharmacy, Poznan University of Medical Sciences, Collegium Pharmaceuticum, 60-806 Poznan, Poland
| | - Julian Malicki
- Department of Electroradiology, Poznan University of Medical Sciences, 61-701 Poznan, Poland
| | - Andrzej Marszałek
- Department of Clinical Pathology, Poznan University of Medical Sciences and Greater Poland Cancer Centre, 61-866 Poznan, Poland
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Wu Y, Guo Y, Luo W. Prediction of all-cause death and specific causes of death in patients with gastric cancer with liver metastasis: a Surveillance, Epidemiology, and End Results-based study. J Gastrointest Surg 2024; 28:880-888. [PMID: 38616463 DOI: 10.1016/j.gassur.2024.03.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/10/2024] [Accepted: 03/15/2024] [Indexed: 04/16/2024]
Abstract
BACKGROUND Gastric cancer (GC), considered the fifth most prevalent malignancy, is the fourth leading cause of cancer death worldwide. This cancer is heterogeneous and invasive and often metastasizes to the liver. The survival of patients with GC, especially cancer-specific survival (CSS), is a matter of concern to their families and medical workers in clinical practice. However, efficient tools for early risk prediction are lacking. Thus, this study aimed to develop a nomogram for forecasting the overall survival (OS) and CSS of patients with GC with liver metastasis (GCLM) based on the Surveillance, Epidemiology, and End Results (SEER) database. METHODS Information on individuals with GCLM was acquired from the SEER database from January 2000 to December 2015. Patients' data were randomized into the train cohort and the test cohort. The independent factors for CSS and OS were determined by univariate and multivariate competing risk analyses and Cox proportional hazards analysis, and the nomograms for predicting CSS and OS were constructed. The receiver operating characteristic curve and calibration curve were used to measure the accuracy and calibration of nomograms. RESULTS Our study included 4372 patients with GCLM, with 3060 patients in the train set and 1312 in the test set. The mean follow-up period was 12.31 months. The independent factors influencing the OS of patients with GCLM were age, bone metastasis, chemotherapy, grade, lung metastasis, stage, primary site, radiotherapy, surgical primary site, T stage, and tumor size. The concordance Index (C-index) of the constructed nomogram for OS were 0.718 (SE, 0.004) in the train set and 0.0.680 (SE, 0.006) in the test set. The independent factors affecting the CSS of patients with GCLM were age, chemotherapy, grade, lung metastasis, stage, radiotherapy, regional lymph node positive, surgical primary site, and total number of tumors. The C-index for the constructed nomogram for CSS were 0.696 (SE, 0.005) in the train set and 0.696 (SE, 0.008) in the test set. CONCLUSION The constructed nomograms showed satisfactory performance in predicting the OS and CSS of patients with GCLM, which can help clinicians formulate follow-up and rehabilitation strategies conducive to survival. At the same time, it can provide more family and social support for high-risk groups.
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Affiliation(s)
- Yingxiang Wu
- Department of General Surgery, The Central Hospital of Wuhan, Wuhan, Hubei, China
| | - Yijun Guo
- Department of General Surgery, General Hospital of Northern Theater Command, Shenyang, Liaoning, China
| | - Wen Luo
- Department of General Surgery, The Central Hospital of Wuhan, Wuhan, Hubei, China.
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Dong Z, Zhang Y, Geng H, Ni B, Xia X, Zhu C, Liu J, Zhang Z. Development and validation of two nomograms for predicting overall survival and cancer-specific survival in gastric cancer patients with liver metastases: A retrospective cohort study from SEER database. Transl Oncol 2022; 24:101480. [PMID: 35868142 PMCID: PMC9304879 DOI: 10.1016/j.tranon.2022.101480] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 06/04/2022] [Accepted: 07/04/2022] [Indexed: 11/25/2022] Open
Abstract
Nomograms constructed by overall survival and cancer-specific survival can predict more accurately than AJCC stage system for GCLM patients. The study includes the prognostic factor as many as possible and evaluated all of them in the cohort. In our cohort, surgery is a beneficial factor associated with survival.
Background Gastric cancer is heterogeneous and aggressive, especially with liver metastasis. This study aims to develop two nomograms to predict the overall survival (OS) and cancer-specific survival (CSS) of gastric cancer with liver metastasis (GCLM) patients. Methods From January 2000 to December 2018, a total of 1936 GCLM patients were selected from the Surveillance, Epidemiology, and End Results Program (SEER) database. They were further divided into a training cohort and a validation cohort, with the OS and CSS serving as the study's endpoints. The correlation analyses were used to determine the relationship between the variables. The univariate and multivariate Cox analyses were used to confirm the independent prognostic factors. To discriminate and calibrate the nomogram, calibration curves and the area under the time-dependent receiver operating characteristic curve (time-dependent AUC) were used. DCA curves were used to examine the accuracy and clinical benefits. The clinical utility of the nomogram and the AJCC Stage System was compared using net reclassification improvement (NRI) and integrated differentiation improvement (IDI) (IDI). Finally, the nomogram and the AJCC Stage System risk stratifications were compared. Results There was no collinearity among the variables that were screened. The results of multivariate Cox regression analysis showed that six variables (bone metastasis, lung metastasis, surgery, chemotherapy, grade, age) and five variables (lung metastasis, surgery, chemotherapy, grade, N stage) were identified to establish the nomogram for OS and CSS, respectively. The calibration curves, time-dependent AUC curves, and DCA revealed that both nomograms had pleasant predictive power. Furthermore, NRI and IDI confirmed that the nomogram outperformed the AJCC Stage System. Conclusion Both nomograms had satisfactory accuracy and were validated to assist clinicians in evaluating the prognosis of GCLM patients.
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Affiliation(s)
- Zhongyi Dong
- Department of Gastrointestinal Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, No.1630 East Road, Pudong New Area, Shanghai 200127, China
| | - Yeqian Zhang
- Department of Gastrointestinal Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, No.1630 East Road, Pudong New Area, Shanghai 200127, China
| | - Haigang Geng
- Department of Gastrointestinal Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, No.1630 East Road, Pudong New Area, Shanghai 200127, China
| | - Bo Ni
- Department of Gastrointestinal Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, No.1630 East Road, Pudong New Area, Shanghai 200127, China
| | - Xiang Xia
- Department of Gastrointestinal Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, No.1630 East Road, Pudong New Area, Shanghai 200127, China
| | - Chunchao Zhu
- Department of Gastrointestinal Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, No.1630 East Road, Pudong New Area, Shanghai 200127, China
| | - Jiahua Liu
- Department of Gastrointestinal Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, No.1630 East Road, Pudong New Area, Shanghai 200127, China.
| | - Zizhen Zhang
- Department of Gastrointestinal Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, No.1630 East Road, Pudong New Area, Shanghai 200127, China.
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Xu X, Xia Y, Ma J, Li W, Niu N, Li X, Tao H, Xu J, He X. Upregulation of miRNA‑301a‑3p promotes tumor progression in gastric cancer by suppressing NKRF and activating NF‑κB signaling. Int J Oncol 2020; 57:522-532. [PMID: 32468020 PMCID: PMC7307585 DOI: 10.3892/ijo.2020.5072] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 05/19/2020] [Indexed: 12/13/2022] Open
Abstract
MicroRNA‑301a (miRNA/miR‑301a) and nuclear factor (NF)‑κB signaling play important roles in tumor invasion, migration and progression. However, the role of miRNA‑301a‑3p in human gastric cancer (GC), and specifically in the activation of NF‑κB signaling, remains unclear. The aim of the present study was to investigate miRNA‑301a‑3p expression in GC progression and the molecular mechanisms as regards the regulation of NF‑κB signaling. Reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR) was used to detect miRNA‑301a‑3p expression in GC and paired normal tissues. The association between the expression of miRNA‑301a‑3p and patient pathological parameters and the prognosis of GC was statistically analyzed using an in situ hybridization (ISH) assay. An MTS assay and a Transwell assay were performed to evaluate the effects of miRNA‑301a‑3p on the proliferation, invasion and migration of GC cells. RT‑qPCR and western blot analysis were used to analyze the association between miRNA‑301a‑3p and nuclear factor‑κB repressing factor (NKRF) expression and the corresponding downstream NF‑κB signaling molecules. A luciferase assay was used to verify the target effect of miRNA‑301a‑3p and NKRF. It was found that miRNA‑301a‑3p expression was significantly higher in 30 cases of primary GC compared with matched normal tissues. Additionally, the ISH assay indicated that the high expression of miRNA‑301a‑3p in GC was associated with tumor invasion depth, lymph node metastasis, lymph node invasion and tumor metastasis stage. Patients whose tumors had a higher miRNA‑301a‑3p expression level exhibited a poorer prognosis. The in vitro assay indicated that miRNA‑301a‑3p affected the proliferative and invasive ability of GC cells by targeting the expression of NKRF, which then affected NF‑κB signaling. Therefore, it was hypothesize that miRNA‑301a‑3p promotes GC progression and affects the prognosis of patients with GC by targeting NKRF, which in turn, directly influences NF‑κB activation.
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Affiliation(s)
- Xiaodong Xu
- Department of Surgical Oncology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310058
- Key Laboratory of Gastroenterology of Zhejiang Province
| | - Yingjie Xia
- Key Laboratory of Gastroenterology of Zhejiang Province
| | - Jie Ma
- Department of Pathology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang 310014
| | - Weijun Li
- Department of General Surgery, People's Hospital of Xianju, Taizhou, Zhejiang 317300, P.R. China
| | - Nan Niu
- Key Laboratory of Gastroenterology of Zhejiang Province
| | - Xiao Li
- Key Laboratory of Gastroenterology of Zhejiang Province
| | - Houquan Tao
- Key Laboratory of Gastroenterology of Zhejiang Province
| | - Ji Xu
- Key Laboratory of Gastroenterology of Zhejiang Province
| | - Xujun He
- Key Laboratory of Gastroenterology of Zhejiang Province
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Ghafouri-Fard S, Vafaee R, Shoorei H, Taheri M. MicroRNAs in gastric cancer: Biomarkers and therapeutic targets. Gene 2020; 757:144937. [PMID: 32640300 DOI: 10.1016/j.gene.2020.144937] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 06/09/2020] [Accepted: 07/01/2020] [Indexed: 02/07/2023]
Abstract
MicroRNAs (miRNAs) are a group of non-coding RNAs that have critical roles in regulation of expression of genes. They can inhibit or decrease expression of target genes mostly via interaction with 3' untranslated region of their targets. Their crucial roles in the regulation of expression of tumor suppressor genes and oncogenes have potentiated them as contributors in tumorigenesis. Moreover, their stability in body fluids has enhanced their potential as cancer biomarkers. In the present review article, we describe the role of miRNAs in the pathogenesis of gastric cancer and advances in application of miRNAs as biomarkers and therapeutic targets in this kind of malignancy.
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Affiliation(s)
- Soudeh Ghafouri-Fard
- Department of Medical Genetics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Reza Vafaee
- Proteomics Research Center, Student Research Committee, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamed Shoorei
- Department of Anatomical Sciences, Faculty of Medicine, Birjand University of Medical Sciences, Birjand, Iran
| | - Mohammad Taheri
- Urogenital Stem Cell Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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6
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Zhang Z, He X, Xu J, Zhang G, Yang Y, Ma J, Sun Y, Ni H, Wang F. Advantages of Restoring miR-205-3p Expression for Better Prognosis of Gastric Cancer via Prevention of Epithelial-mesenchymal Transition. J Gastric Cancer 2020; 20:212-224. [PMID: 32596004 PMCID: PMC7311212 DOI: 10.5230/jgc.2020.20.e19] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 01/15/2020] [Accepted: 04/20/2020] [Indexed: 01/11/2023] Open
Abstract
Purpose miR-205 is a tumor suppressor and plays an important role in tumor invasiveness. However, the role of miR-205 in human gastric cancer (GC) epithelial-mesenchymal transition (EMT) remains unclear. The aim of this study was to investigate the molecular mechanism of miR-205 in the regulation of EMT in GC invasion. Materials and Methods Quantitative polymerase chain reaction (qPCR) was used to detect the expression of miR-205 in GC. Further, the correlation between the pathological parameters and prognosis of GC was statistically analyzed. A transwell model was used to evaluate the effect of miR-205-3p on the invasion and migration of GC cells. qPCR, western blotting, and luciferase assay were performed to analyze the relationship and target effects between miR-205-3p and the expression of zinc finger electron box binding homologous box 1 (ZEB1) and 2 (ZEB2). Results We found that the levels of miR-205-3p were significantly lower (P<0.05) in GC tissues than in matched normal tissues. Additionally, the expression of miR-205-3p was related to the tumor invasion depth, lymph node metastasis, lymph node invasion, and tumor, node, metastasis stage. Patients with lower miR-205-3p expression levels in the tumors had a poorer prognosis. The in vitro assays indicated that miR-205-3p could affect the invasion ability and EMT of GC cells by targeting the expression of both ZEB1 and ZEB2. Conclusions miR-205-3p promotes GC progression and affects the prognosis of patients by targeting both ZEB1 and ZEB2 to directly influence EMT.
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Affiliation(s)
- Zhen Zhang
- Department of Clinical Laboratory, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Xujun He
- Key Laboratory of Gastroenterology of Zhejiang Province, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Ji Xu
- Key Laboratory of Gastroenterology of Zhejiang Province, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China.,Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Genhua Zhang
- Department of Pathology, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Yue Yang
- Department of Pathology, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Jie Ma
- Department of Pathology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Yuanshui Sun
- Department of General Surgery, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Haibin Ni
- Department of General Surgery, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Fengyong Wang
- Department of General Surgery, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang, China
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Ma Y, Xu XL, Huang HG, Li YF, Li ZG. LncRNA TDRG1 promotes the aggressiveness of gastric carcinoma through regulating miR-873-5p/HDGF axis. Biomed Pharmacother 2019; 121:109425. [PMID: 31726370 DOI: 10.1016/j.biopha.2019.109425] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 08/31/2019] [Accepted: 08/31/2019] [Indexed: 02/07/2023] Open
Abstract
Gastric carcinoma (GC) is still one of the most common digestive system neoplasms and the primary reason for malignant cancer-associated death. Long non-coding RNAs (lncRNAs) have been reported to play critical roles in GC progression. In this study, we demonstrated that lncRNA testis development-related gene 1 (TDRG1) is markedly upregulated in clinical GC tissues and GC cells. High level of lncRNA TDRG1 correlates with the metastasis and prognosis of patients with GC. Overexpression of lncRNA TDRG1 promotes GC growth and metastatic-related traits in vitro and in vivo, and silencing TDRG1 causes opposite results. We future find that TDRG1 is inversely associated with miR-873-5p and positively modulates the expression of hepatoma-derived growth factor (HDGF), a functional target gene of miR-873-5p. Finally, lncRNA TDRG1 regulates the progression of GC through regulating miR-873-5p/HDGF pathway. Taken together, our data uncover the crucial function of TDRG1-miR-873-5p-HDGF axis in human gastric cancer.
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Affiliation(s)
- Yan Ma
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Xiu Lian Xu
- The First Department of General Surgery, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China
| | - Hai Ge Huang
- Department of Gastroenterological Surgery, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi Zhuang Autonomous Region, China
| | - Yan Feng Li
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China.
| | - Zhi Guo Li
- Department of Gastroenterological Surgery, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China.
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8
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Dang SC, Fan YY, Cui L, Chen JX, Qu JG, Gu M. PLK1 as a potential prognostic marker of gastric cancer through MEK-ERK pathway on PDTX models. Onco Targets Ther 2018; 11:6239-6247. [PMID: 30288059 PMCID: PMC6163028 DOI: 10.2147/ott.s169880] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Background PLK1 has been identified as having a great effect on cell division and maintaining genomic stability in mitosis, spindle assembly, and DNA damage response by current studies. Materials and methods We assessed PLK1 expression in cervical cancer tissues and cells. We have also evaluated the effects of PLK1 on gastric cancer cell proliferation, migration, and apoptosis both in vitro and in vivo. Results Our results show that PLK1 is overexpressed in gastric cancer tissues and cells. Inhibition of PLK1 contributes cell cycle G2-phase arrest and inhibits the proliferation, migration, and apoptosis of gastric cancer (GC) cells, whereas its overexpression promotes proliferation, migration, and apoptosis in these cells. Moreover, PLK1 inhibition reduces expression of pMEK and pERK. More importantly, in vivo by analyzing tumorigenesis in patient-derived tumor xenograft (PDTX) models, the inhibition of PLK1 activity by BI6727 significantly decreased the volume and weight of the tumors compared with control group (P<0.01). Conclusion Our results found that PLK1 has a significant impact on the survival of GC cells; it may become a prognostic judge, a potential therapeutic target, and a preventative biomarker of GC.
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Affiliation(s)
- Sheng-Chun Dang
- Department of General Surgery, The Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu Province, People's Republic of China
| | - Yi-Yi Fan
- Department of General Surgery, The Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu Province, People's Republic of China
| | - Lei Cui
- Department of General Surgery, The Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu Province, People's Republic of China
| | - Ji-Xiang Chen
- Department of General Surgery, The Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu Province, People's Republic of China
| | - Jian-Guo Qu
- Department of General Surgery, The Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu Province, People's Republic of China
| | - Min Gu
- Zhenjiang Integrative Medicine Hospital, Zhenjiang, Jiangsu Province, People's Republic of China,
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Lacerda JZ, Drewes CC, Mimura KKO, Zanon CDF, Ansari T, Gil CD, Greco KV, Farsky SHP, Oliani SM. Annexin A1 2-26 Treatment Improves Skin Heterologous Transplantation by Modulating Inflammation and Angiogenesis Processes. Front Pharmacol 2018; 9:1015. [PMID: 30250432 PMCID: PMC6139386 DOI: 10.3389/fphar.2018.01015] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 08/20/2018] [Indexed: 12/14/2022] Open
Abstract
Skin graft successful depends on reduction of local inflammation evoked by the surgical lesion and efficient neovascularization to nutrition the graft. It has been shown that N-terminal portion of the Annexin A1 protein (AnxA1) with its anti-inflammatory properties induces epithelial mucosa repair and presents potential therapeutic approaches. The role of AnxA1 on wound healing has not been explored and we investigated in this study the effect of the peptide Ac2-26 (N-terminal AnxA1 peptide Ac2-26; AnxA12-26) on heterologous skin scaffolds transplantation in BALB/c mice, focusing on inflammation and angiogenesis. Treatment with AnxA12-26, once a day, from day 3-60 after scaffold implantation improved the take of the implant, induced vessels formation, enhanced gene and protein levels of the vascular growth factor-A (VEGF-A) and fibroblast influx into allograft tissue. It also decreased pro- while increasing anti-inflammatory cytokines. The pro-angiogenic activity of AnxA12-26 was corroborated by topical application of AnxA12-26 on the subcutaneous tissue of mice. Moreover, treatment of human umbilical endothelial cells (HUVECs) with AnxA12-26 improved proliferation, shortened cycle, increased migration and actin polymerization similarly to those evoked by VEGF-A. The peptide treatment instead only potentiated the tube formation induced by VEGF-A. Collectively, our data showed that AnxA12-26 treatment favors the tissue regeneration after skin grafting by avoiding exacerbated inflammation and improving the angiogenesis process.
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Affiliation(s)
- Jéssica Zani Lacerda
- São Paulo State University (Unesp), Institute of Biosciences, Humanities and Exact Sciences (Ibilce), São Paulo, Brazil
| | - Carine Cristiane Drewes
- Department of Clinical and Toxicological Analysis, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | | | - Caroline de Freitas Zanon
- São Paulo State University (Unesp), Institute of Biosciences, Humanities and Exact Sciences (Ibilce), São Paulo, Brazil
| | - Tahera Ansari
- Department of Surgical Research, Northwick Park Institute for Medical Research, University College London, London, United Kingdom
| | - Cristiane Damas Gil
- Post-Graduation in Structural and Functional Biology, Federal University of São Paulo, São Paulo, Brazil
| | - Karin Vicente Greco
- Department of Surgical Research, Northwick Park Institute for Medical Research, University College London, London, United Kingdom
| | - Sandra Helena Poliselli Farsky
- Department of Clinical and Toxicological Analysis, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Sonia Maria Oliani
- São Paulo State University (Unesp), Institute of Biosciences, Humanities and Exact Sciences (Ibilce), São Paulo, Brazil.,Post-Graduation in Structural and Functional Biology, Federal University of São Paulo, São Paulo, Brazil
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Tan Z, Jia J, Jiang Y. MiR-150-3p targets SP1 and suppresses the growth of glioma cells. Biosci Rep 2018; 38:BSR20180019. [PMID: 29654167 PMCID: PMC6048207 DOI: 10.1042/bsr20180019] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Revised: 03/22/2018] [Accepted: 04/03/2018] [Indexed: 12/15/2022] Open
Abstract
Glioma has been considered as one of the most prevalent and common malignancy of the nervous system; however, the underlying mechanisms that are responsible for the occurrence and development of glioma still remain largely unknown. Amounting evidence highlights the critical regulatory function of miRNAs in carcinogenesis. Here, we showed that the expression of miR-150-3p was significantly decreased in glioma tissues and cell lines. Suppressed expression of miR-150-3p was associated with the lymph node metastasis of the glioma patients. Overexpression of miR-150-3p significantly inhibited the proliferation of glioma cells. Molecular study uncovered that the transcription factor specificity protein 1 (SP1) was identified as one of the targets of miR-150-3p Highly expressed miR-150-3p in glioma cells significantly decreased both the mRNA and protein levels of SP1. Consistently, the abundance of phosphatase and tension homolog deleted on chromosome ten (PTEN), a negative downstream target of SP1, was increased with the ectopic miR-150-3p Collectively, these results suggested that miR-150-3p suppressed the growth of glioma cells partially via regulating SP1 and possibly PTEN.
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Affiliation(s)
- Zhigang Tan
- Department of Neurosurgery, The Second Xiangya Hospital of Central South University (CSU), Changsha, Hunan 410011, China
| | - Jiaoying Jia
- Department of Neurosurgery, The Second Xiangya Hospital of Central South University (CSU), Changsha, Hunan 410011, China
| | - Yugang Jiang
- Department of Neurosurgery, The Second Xiangya Hospital of Central South University (CSU), Changsha, Hunan 410011, China
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11
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Hui L, Zhang J, Guo X. MiR-125b-5p suppressed the glycolysis of laryngeal squamous cell carcinoma by down-regulating hexokinase-2. Biomed Pharmacother 2018; 103:1194-1201. [PMID: 29864898 DOI: 10.1016/j.biopha.2018.04.098] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 04/13/2018] [Accepted: 04/13/2018] [Indexed: 12/26/2022] Open
Abstract
Laryngeal squamous cell carcinoma (LSCC) is the most common form of laryngeal carcinoma with poor prognosis. Exploring novel factors involved in the progression of LSCC is quite necessary for understanding the mechanisms and designing therapeutic strategies for LSCC. In this study, we showed that miR-125b-5p was significantly down-regulated in LSCC tissues and cell lines. The decreased expression of miR-125b-5p was associated with the tumor differentiation, metastasis and high clinical stage of the LSCC patients. Overexpression of miR-125b-5p suppressed the proliferation and induced apoptosis of LSCC cells. Bioinformatics analysis predicted hexokinase-2 (HK2), an essential enzyme involved in the glycolysis of cancer cells, as one of the downstream targets of miR-125b-5p. Further molecular studies showed that highly expressed miR-125b-5p bound the 3'-UTR of HK2 and decreased both the mRNA and protein levels of HK2. Consistent with the function of HK2 in glycolytic metabolism, overexpression of miR-125b-5p significantly suppressed the glucose consumption and lactate production of LSCC cells. Notably, restoration the expression of HK2 attenuated the inhibitory effect of miR-125b-5p on the glycolysis of LSCC cells. The inverse correlation between the expression of miR-125b-5p and HK2 in LSCC tissues further supported the involvement of miR-125b-5p-HK2 axis in the progression of LSCC. Collectively, these finding suggested the miR-125b-5p-HK2 pathway as a novel mechanism in regulating the glycolysis and progression of LSCC.
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Affiliation(s)
- Lian Hui
- Department of Otolaryngology, The First Hospital of China Medical University, No. 155 Nanjing Bei Street, Shenyang, 110001, China.
| | - Jingru Zhang
- Department of Otolaryngology, The First Hospital of China Medical University, No. 155 Nanjing Bei Street, Shenyang, 110001, China
| | - Xing Guo
- Department of Otolaryngology, The First Hospital of China Medical University, No. 155 Nanjing Bei Street, Shenyang, 110001, China
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12
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Yu B, Jiang K, Zhang J. MicroRNA-124 suppresses growth and aggressiveness of osteosarcoma and inhibits TGF-β-mediated AKT/GSK-3β/SNAIL-1 signaling. Mol Med Rep 2018; 17:6736-6744. [PMID: 29488603 DOI: 10.3892/mmr.2018.8637] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 09/13/2017] [Indexed: 11/05/2022] Open
Abstract
Osteosarcoma is one of the most common malignant tumors in adolescent populations and the prognosis remains incompletely understand. Previous reports have demonstrated that microRNA‑124 (miR‑124) has inhibitory effects on various human malignancies and is associated with tumor progression. However, the clinical significance and potential mechanisms of miR‑124 in the progression of osteosarcoma is not clearly understood. In this study, the potential molecular mechanism of miR‑124 in osteosarcoma tumorigenesis, growth and aggressiveness was investigated. The growth, proliferation, apoptosis, migration and invasion of osteosarcoma cells were investigated following miR‑124 transfection were determined by colony formation assay, western blotting, immunofluorescence, migration/invasion assays and reverse transcription‑quantitative polymerase chain reaction. In vivo anti‑cancer effects of miR‑124 were analyzed by a tumor growth assay, immunohistochemistry and survival rate observations. The results demonstrated that miR‑124 transfection significantly decreased integrin expression in osteosarcoma cells, and further inhibited growth, proliferation, migration and invasion of osteosarcoma cells. Flow cytometry assays indicated that miR‑124 transfection attenuated apoptosis resistance of osteosarcoma to tunicamycin, potentially via the downregulation of P53 and Bcl‑2 apoptosis regulator expression. Mechanistic assays demonstrated that miR‑124 transfection suppressed TGF‑β expression in osteosarcoma. An animal study revealed that tumor growth was reduced in tumor cells transfected with miR‑124 compared with control cells, and the survival rate was prolonged in mice with miR‑124 transfected xenografts compared with control tumors. In conclusion, these results indicate that miR‑124 transection inhibits the growth and aggressive of osteosarcoma, potentially via suppression of TGF‑β‑mediated AKT/GSK‑3β/snail family transcriptional repressor 1 (SNAIL‑1) signaling, suggesting miR‑124 may be a potential anti‑cancer agent/target for osteosarcoma therapy.
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Affiliation(s)
- Bo Yu
- Department of Orthopedics, Renji Hospital Shanghai Jiao Tong University School of Medicine, Shanghai 200127, P.R. China
| | - Kaibiao Jiang
- Department of Orthopedics, Renji Hospital Shanghai Jiao Tong University School of Medicine, Shanghai 200127, P.R. China
| | - Jidong Zhang
- Department of Orthopedics, Renji Hospital Shanghai Jiao Tong University School of Medicine, Shanghai 200127, P.R. China
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13
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Yang X, Xu X, Zhu J, Zhang S, Wu Y, Wu Y, Zhao K, Xing C, Cao J, Zhu H, Li M, Ye Z, Peng W. miR-31 affects colorectal cancer cells by inhibiting autophagy in cancer-associated fibroblasts. Oncotarget 2018; 7:79617-79628. [PMID: 27793031 PMCID: PMC5346740 DOI: 10.18632/oncotarget.12873] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 09/25/2016] [Indexed: 01/02/2023] Open
Abstract
Autophagy is a double-edged sword in tumor development. Recent studies have found that miRNAs have an inhibitory effect on the regulation of autophagy. It has been reported that miR-31 plays an important role in the development of colorectal cancer. However, what role miR-31 plays in colorectal cancer-associated fibroblasts (CAFs) has not been determined. In this study, we confirmed that the expression of miR-31 in CAFs was higher than in normal colorectal fibroblasts (NFs). We also found that treatment of CAFs with miR-31 mimic inhibited the expression of the autophagy-related genes Beclin-1, ATG, DRAM and LC3. In addition, we found up-regulation of miR-31 significantly affected colorectal cancer cell behaviors, including proliferation, invasion and apoptosis. Also, up-regulation of miR-31 in CAF could increase the radiosensitivity of colorectal cancer cells co-cultured with CAF. In summary, miR-31 can inhibit autophagy in colorectal CAFs, affect colorectal cancer development, and increase the radiosensitivity of colorectal cancer cells co-cultured with CAF. We hypothesize that miR-31 may become a new target of treatments for colorectal cancer.
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Affiliation(s)
- Xiaodong Yang
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Xiaohui Xu
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China.,Department of General Surgery, The First People's Hospital of Taicang City, Taicang Affiliated Hospital of Soochow University, Suzhou 215400, China
| | - Junjia Zhu
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Shuyu Zhang
- School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou 215123, China
| | - Yong Wu
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Yongyou Wu
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Kui Zhao
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Chungen Xing
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Jianping Cao
- School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou 215123, China
| | - Hong Zhu
- Oncology Department, The First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Ming Li
- School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou 215123, China
| | - Zhenyu Ye
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Wei Peng
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
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14
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Zhu C, Huang Q, Zhu H. Melatonin Inhibits the Proliferation of Gastric Cancer Cells Through Regulating the miR-16-5p-Smad3 Pathway. DNA Cell Biol 2018; 37:244-252. [PMID: 29359963 DOI: 10.1089/dna.2017.4040] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The incidence and mortality of gastric cancer is steadily increasing annually around the world, which required further investigation about alternative therapy strategies. Melatonin, an indoleamine synthesized in the pineal gland, has shown dramatic anticancer effect in several cancers, however, the function of melatonin in gastric cancer needs to be characterized. In this study, we found that melatonin inhibited the growth and induced apoptosis of gastric cancer cells. microRNAs (miRNAs) have been attractive targets for many anticancer drugs. To explore the underlying molecular mechanism by which melatonin attenuated the growth of cancer cells, miRNA microarray analysis was performed to screen the miRNAs, which significantly altered after melatonin treatment. The result showed that melatonin administration enhanced the expression of miR-16-5p. Further molecular mechanism research revealed that miR-16-5p targeted Smad3 and consequently negatively regulated the abundance of Smad3. Consistently, melatonin exposure decreased the level of Smad3 and overexpression of Smad3 attenuated the inhibitory effect of melatonin in gastric cancer cells. These results uncovered the anticancer effect of melatonin and highlighted the critical roles of miR-16-5p-Smad3 pathway in melatonin-induced growth defects of gastric cancers.
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Affiliation(s)
- Chenyu Zhu
- 1 Gastrointestinal Surgery, The First College of Clinical Medical Science, China Three Gorges University , Yi Chang, China
| | - Qun Huang
- 2 Operating Room, The First College of Clinical Medical Science, China Three Gorges University , Yi Chang, China
| | - Hongyu Zhu
- 3 Gynecology Department, The First College of Clinical Medical Science, China Three Gorges University , Yi Chang, China
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15
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Wei Y, Liu Z, Fang J. H19 functions as a competing endogenous RNA to regulate human epidermal growth factor receptor expression by sequestering let‑7c in gastric cancer. Mol Med Rep 2017; 17:2600-2606. [PMID: 29207111 DOI: 10.3892/mmr.2017.8184] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 09/22/2017] [Indexed: 11/05/2022] Open
Abstract
Long non‑coding RNA (lncRNA) H19 has been suggested to serve important roles in the progression of gastric cancer (GC); however, the mechanism involved is largely unknown. The present study aimed to investigate the mechanism underlying the effect of H19 on human epidermal growth factor receptor (HER2) expression. Let‑7c belongs to the let‑7 family, which has been reported to be downregulated in cancers and considered to serve as a tumor suppressor. Let‑7c has been negatively associated with the expression of human epidermal growth factor receptor 2 (HER2). Reverse transcription‑quantitative polymerase chain reaction was used to examine the expression levels of H19 and let‑7c in GC tissues and cell lines. HER2 protein expression levels were examined using immunohistochemistry and western blot analyses. The effect of H19 on let‑7c and HER2 expression was analyzed following transfection of small interfering RNA targeting H19 in GC cells. The results indicated that the expression levels of H19 lncRNA in GC tissue samples were significantly higher when compared with that in matched benign adjacent tissue samples (P<0.001). H19‑silenced GC cells exhibited significantly increased let‑7c expression and decreased HER2 protein expression levels. Assessment of tumor diameter and pathological tumor stage suggested that increased H19 expression was associated with a poorer prognosis in patients with GC. The results of the present study suggest that H19 may function as a competing endogenous RNA to regulate HER2 expression by sequestering let‑7c in GC cells. The present study has aided the understanding of the mechanism of H19 lncRNA in GC, and has provided evidence for the application of lncRNA‑based diagnostic and therapeutic strategies for GC.
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Affiliation(s)
- Yueguang Wei
- Department of Gastroenterology, General Hospital of Daqing Oilfield, Daqing, Heilongjiang 163001, P.R. China
| | - Zhaoyang Liu
- Department of Gastroenterology, General Hospital of Daqing Oilfield, Daqing, Heilongjiang 163001, P.R. China
| | - Jinhui Fang
- Department of Gastroenterology, General Hospital of Daqing Oilfield, Daqing, Heilongjiang 163001, P.R. China
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16
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Lu M, Wang Y, Zhou S, Xu J, Li J, Tao R, Zhu Y. MicroRNA-370 suppresses the progression and proliferation of human astrocytoma and glioblastoma by negatively regulating β-catenin and causing activation of FOXO3a. Exp Ther Med 2017; 15:1093-1098. [PMID: 29399110 DOI: 10.3892/etm.2017.5494] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Accepted: 06/29/2017] [Indexed: 02/07/2023] Open
Abstract
Certain microRNAs (miRs) regulate the progression and metastasis of various cancer types. In the present study, the role of miR-370 in the progression and proliferation of human astrocytoma and glioblastoma cells was assessed and the underlying molecular mechanism was investigated. miR-370 levels in clinical specimens of human glioma and peritumoral tissues were determined by reverse-transcription quantitative PCR. Oligonucleotide mimics and inhibitors were transfected into the U-251MG human astrocytoma cell line and the and U-87MG glioblastoma cell line and the cell viability of was determined by an MTT assay. The expression of β-catenin and forkhead box protein (FOX)O3a was determined by western blot analysis. The results revealed that the expression of miR-370 in human glioma tissues was significantly decreased compared with that in peritumoral tissues. The miR-370 levels in patients with grade III/IV gliomas were significantly decreased compared with those in grade I/II. Transfection with miR-370 mimics inhibited the proliferation of U-251MG and U-87MG cells. Furthermore, the miR-370 levels were negatively correlated with β-catenin and positively correlated with nuclear FOXO3a. In conclusion, miR-370 inhibited the proliferation of human glioma cells by regulating the levels of β-catenin and the activation of FOXO3a, suggesting that miR-370 was a tumor suppressor in the progression of human astrocytoma and glioblastoma cells.
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Affiliation(s)
- Ming Lu
- Department of Radiotherapy, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong 250117, P.R. China
| | - Yong Wang
- Department of Neurosurgery, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong 250117, P.R. China
| | - Shizhen Zhou
- Department of Neurosurgery, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong 250117, P.R. China
| | - Jun Xu
- Department of Neurosurgery, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong 250117, P.R. China
| | - Jing Li
- Department of Neurosurgery, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong 250117, P.R. China
| | - Rongjie Tao
- Department of Neurosurgery, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong 250117, P.R. China
| | - Yufang Zhu
- Department of Neurosurgery, Shandong Cancer Hospital Affiliated to Shandong University, Shandong Academy of Medical Sciences, Jinan, Shandong 250117, P.R. China
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17
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Long Noncoding RNA PVT1 Acts as a "Sponge" to Inhibit microRNA-152 in Gastric Cancer Cells. Dig Dis Sci 2017; 62:3021-3028. [PMID: 28258379 DOI: 10.1007/s10620-017-4508-z] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 01/10/2017] [Indexed: 01/26/2023]
Abstract
BACKGROUND PVT1 was up-regulated in patients with gastric cancer (GC) and might be as a novel biomarker for predicting GC. However, the exact mechanism of PVT1 exerting functions in GC was still poorly understood. Emerging evidence suggests that long noncoding RNAs may act as endogenous microRNA (miRNA) sponges to bind to miRNAs and regulate their function. AIM This study aimed to determine the function of PVT1 on miR-152 expression in GC cells. METHODS The levels of PVT1 and miR-152 were determined in GC tissues by quantitative real-time PCR. The expression of miR-152 was detected in GC cells transfected with PVT1 plasmid or siPVT1. Luciferase assay was performed to verify the regulation of miR-152 to CD151 or FGF2 expression and PVT1 to miR-152 expression. The effects of PVT1 on the expression of CD151 and FGF2 were evaluated by Western blot. RESULTS PVT1 was up-regulated in GC tissues than that in the matched normal tissues, and mRNA level of miR-152 was decreased. MiR-152 was negatively associated with PVT1 expression in GC tissues. Based on the in silico analysis, we found that PVT1 have three binding sequences for miR-152. Moreover, PVT1 might inhibit the expression of miR-152 and increased the expression of CD151 and FGF2 through regulating miR-152. PVT1 was positively associated with CD151 and FGF2 expression in GC tissues. CONCLUSIONS PVT1 might act as a "sponge" to inhibit miR-152 in gastric cancer cells. PVT1 is a promising molecular target to improve the diagnosis and therapy of GC.
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18
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miR-182-5p improves the viability, mitosis, migration, and invasion ability of human gastric cancer cells by down-regulating RAB27A. Biosci Rep 2017; 37:BSR20170136. [PMID: 28546229 PMCID: PMC6434084 DOI: 10.1042/bsr20170136] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 05/22/2017] [Accepted: 05/25/2017] [Indexed: 12/27/2022] Open
Abstract
We investigated the effect of miR-182-5p on the viability, proliferation, invasion, and migration ability of human gastric cells by regulating the expression of RAB27A. Real-time PCR assay was used to detect the expression of miR-182-5 and RAB27A in human gastric carcinoma tissues, para-carcinoma tissues, and different cell lines. Western blotting was also used to determine the RAB27A expression in both tissues and cell lines. We chose the HGC-27 cell line as experiment subject as it demonstrated the highest miR-182-5p level. HGC-27 cells were transfected with different vectors and the cell viability, mitosis, invasion, and migration ability were measured through MTT assay, flow cytometry (FCM) analysis, Transwell assay, and wound healing assay. In comparison with the normal tissues, miR-182-5p is expressed at a higher level in gastric cancer (GC) tissues, while RAB27A is expressed at a lower level in cancerous tissues. The down-regulation of miR-182-5p and up-regulation of RAB27A can significantly decrease the viability, migration, invasion, and mitosis of HGC-27 cells. The target relationship between miR-182-5p and RAb27A was confirmed through a dual-luciferase reporter gene assay and Western blot assay. miR-182-5p enhances the viability, mitosis, migration, and invasion of human GC cells by down-regulating RAB27A.
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19
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Xia X, Wang J, Liu Y, Yue M. Lower Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) Promotes the Proliferation and Migration of Endometrial Carcinoma. Med Sci Monit 2017; 23:966-974. [PMID: 28225751 PMCID: PMC5333717 DOI: 10.12659/msm.899341] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Background The incidence and death rates of endometrial cancer are alarmingly increasing. The diagnosis and treatment of endometrial cancer is crucial to decreasing mortality. Cystic fibrosis transmembrane conductance regulator (CFTR) belongs to the adenosine triphosphate (ATP)-binding cassette transporter family and plays an essential role in anion regulation and tissue homeostasis of various epithelia. This study explored the expression of CFTR in endometrial carcinoma and the role of CFTR in proliferation and migration of endometrial carcinoma cells. Material/Methods Immunohistochemistry and real-time (RT)-PCR were used to test the expression of CFTR in normal endometrium and endometrial carcinoma. CFTR inhibitor was used to restrain the expression of CFTR on the endometrial carcinoma, the effects on the proliferation and migration of endometrial carcinoma cells were also studied. RT-PCR was performed to test the expression of mir-125b after restraining CFTR. Proliferation and migration capability of endometrial carcinoma cells were detected after transfection of endometrial carcinoma cells with mir-125b mimic. Results Compared with cells from normal endometrium, the expression of CFTR was significantly upregulated in endometrial carcinoma cells. After adding CFTR(inh)172, the capability for proliferation and transfer of endometrial carcinoma cells was strengthened, the expression of mir-125b was reduced, and after transfection with mir-125b mimics entering the endometrial carcinoma cells, the ability of the proliferation and transfer of endometrial carcinoma cells was also reduced. Conclusions The high expression of CFTR in the endometrial carcinoma cells played a pivotal role in restraining the proliferation and transfer of endometrial carcinoma cells.
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Affiliation(s)
- Xian Xia
- Department of Nosocomial Infection Control, PLA Army General Hospital, Beijing, China (mainland)
| | - Jie Wang
- School of Nursing, Nanjing Medical University, Nanjing, Jiangsu, China (mainland)
| | - Yuan Liu
- Department of Infectious Diseases, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China (mainland)
| | - Ming Yue
- Department of Infectious Diseases, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China (mainland)
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da Silva Oliveira KC, Thomaz Araújo TM, Albuquerque CI, Barata GA, Gigek CO, Leal MF, Wisnieski F, Rodrigues Mello Junior FA, Khayat AS, de Assumpção PP, Rodriguez Burbano RM, Smith MC, Calcagno DQ. Role of miRNAs and their potential to be useful as diagnostic and prognostic biomarkers in gastric cancer. World J Gastroenterol 2016; 22:7951-7962. [PMID: 27672290 PMCID: PMC5028809 DOI: 10.3748/wjg.v22.i35.7951] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Revised: 06/14/2016] [Accepted: 08/01/2016] [Indexed: 02/06/2023] Open
Abstract
Alterations in epigenetic control of gene expression play an important role in many diseases, including gastric cancer. Many studies have identified a large number of upregulated oncogenic miRNAs and downregulated tumour-suppressor miRNAs in this type of cancer. In this review, we provide an overview of the role of miRNAs, pointing to their potential to be useful as diagnostic and/or prognostic biomarkers in gastric cancer. Moreover, we discuss the influence of polymorphisms and epigenetic modifications on miRNA activity.
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21
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Yang Q, Mas A, Diamond MP, Al-Hendy A. The Mechanism and Function of Epigenetics in Uterine Leiomyoma Development. Reprod Sci 2016; 23:163-75. [PMID: 25922306 PMCID: PMC5933172 DOI: 10.1177/1933719115584449] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Uterine leiomyomas, also known as uterine fibroids, are the most common pelvic tumors, occurring in nearly 70% of all reproductive-aged women and are the leading indication for hysterectomy worldwide. The development of uterine leiomyomas involve a complex and heterogeneous constellation of hormones, growth factors, stem cells, genetic, and epigenetic abnormalities. An increasing body of evidence emphasizes the important contribution of epigenetics in the pathogenesis of leiomyomas. Genome-wide methylation analysis demonstrates that a subset of estrogen receptor (ER) response genes exhibit abnormal hypermethylation levels that are inversely correlated with their RNA expression. Several tumor suppressor genes, including Kruppel-like factor 11 (KLF11), deleted in lung and esophageal cancer 1 (DLEC1), keratin 19 (KRT19), and death-associated protein kinase 1 (DAPK1) also display higher hypermethylation levels in leiomyomas when compared to adjacent normal tissues. The important role of active DNA demethylation was recently identified with regard to the ten-eleven translocation protein 1 and ten-eleven translocation protein 3-mediated elevated levels of 5-hydroxymethylcytosine in leiomyoma. In addition, both histone deacetylase and histone methyltransferase are reported to be involved in the biology of leiomyomas. A number of deregulated microRNAs have been identified in leiomyomas, leading to an altered expression of their targets. More recently, the existence of side population (SP) cells with characteristics of tumor-initiating cells have been characterized in leiomyomas. These SP cells exhibit a tumorigenic capacity in immunodeficient mice when exposed to 17β-estradiol and progesterone, giving rise to fibroid-like tissue in vivo. These new findings will likely enhance our understanding of the crucial role epigenetics plays in the pathogenesis of uterine leiomyomas as well as point the way to novel therapeutic options.
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Affiliation(s)
- Qiwei Yang
- Division of Translation Research, Department of Obstetrics and Gynecology, Georgia Regents University, Medical College of Georgia, Augusta, GA, USA
| | - Aymara Mas
- Division of Translation Research, Department of Obstetrics and Gynecology, Georgia Regents University, Medical College of Georgia, Augusta, GA, USA
| | - Michael P Diamond
- Division of Translation Research, Department of Obstetrics and Gynecology, Georgia Regents University, Medical College of Georgia, Augusta, GA, USA
| | - Ayman Al-Hendy
- Division of Translation Research, Department of Obstetrics and Gynecology, Georgia Regents University, Medical College of Georgia, Augusta, GA, USA
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Wu X, Tan X, Fu SW. May Circulating microRNAs be Gastric Cancer Diagnostic Biomarkers? J Cancer 2015; 6:1206-13. [PMID: 26535061 PMCID: PMC4622850 DOI: 10.7150/jca.12535] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 08/25/2015] [Indexed: 12/13/2022] Open
Abstract
Gastric cancer (GC) is the third leading cause of cancer-related deaths. More than 80% of the diagnosis was made at the advanced stages of the disease, highlighting the urgent demand for novel biomarkers that can be used for early detection. Recently, a number of studies suggest that circulating microRNAs (miRNAs) could be potential biomarkers for GC diagnosis. Cancer-related circulating miRNAs, as well as tissue miRNAs, provide a hopeful prospect of detecting GC at early stages, and the prospective participation of miRNAs in biomarker development will enhance the sensitivity and specificity of diagnostic tests for GC. As miRNAs in blood are stable, their potential value as diagnostic biomarkers in GC has been explored over the past few years. However, due to the inconsistent or sometimes conflicting reports, large-scale prospective studies are needed to validate their potential applicability in GC diagnosis. This review summarizes the current development about potential miRNA biomarkers for GC diagnosis and the obstacles hindering their clinical usage.
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Affiliation(s)
- Xiaoling Wu
- 1. Department of Gastroenterology, Chengdu Military General Hospital, Chengdu, China
- 2. Department of Medicine (Division of Genomic Medicine), The George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Xiaohui Tan
- 2. Department of Medicine (Division of Genomic Medicine), The George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Sidney W. Fu
- 2. Department of Medicine (Division of Genomic Medicine), The George Washington University School of Medicine and Health Sciences, Washington, DC
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Zheng Z, Yan D, Chen X, Huang H, Chen K, Li G, Zhou L, Zheng D, Tu L, Dong XD. MicroRNA-206: Effective Inhibition of Gastric Cancer Progression through the c-Met Pathway. PLoS One 2015; 10:e0128751. [PMID: 26186594 PMCID: PMC4505964 DOI: 10.1371/journal.pone.0128751] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 05/01/2015] [Indexed: 01/24/2023] Open
Abstract
MicroRNAs are endogenous short chain nucleotide RNAs that regulate gene function by direct binding of target mRNAs. In this study, we investigated the effects of microRNA-206 (miR-206) on the development of gastric cancer. miR-206 was first confirmed to be downregulated in gastric cancer specimens. Conversely, upregulation of c-Met was confirmed in tissue samples of human gastric cancer, with its level inversely correlated with miR-206 expression. Introduction of miR-206 inhibited cellular proliferation by inducing G1 cell cycle arrest, as well as migration and invasion. Moreover, important proliferation and/or migration related molecules such as c-Met, CDK4, p-Rb, p-Akt and p-ERK were confirmed to be downregulated by Western blot analysis. Targeting of c-Met also directly affected AGS cell proliferation, migration and invasion. In vivo, miR-206 expressing tumor cells also displayed growth delay in comparison to unaffected tumor cells. Our results demonstrated that miR-206 suppressed c-Met expression in gastric cancer and could function as a potent tumor suppressor in c-Met overexpressing tumors. Inhibition of miR-206 function could contribute to aberrant cell proliferation and migration, leading to gastric cancer development.
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Affiliation(s)
- Zhiqiang Zheng
- Wenzhou Medical University, Wenzhou, Zhejiang, China
- The Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Dongsheng Yan
- Wenzhou Medical University, Wenzhou, Zhejiang, China
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
- State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health of P. R. China, Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - Xiaoyan Chen
- Wenzhou Medical University, Wenzhou, Zhejiang, China
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
- State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health of P. R. China, Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - He Huang
- Wenzhou Medical University, Wenzhou, Zhejiang, China
- The Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Ke Chen
- Wenzhou Medical University, Wenzhou, Zhejiang, China
- The Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Guangjing Li
- Wenzhou Medical University, Wenzhou, Zhejiang, China
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
- State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health of P. R. China, Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - Linglin Zhou
- Wenzhou Medical University, Wenzhou, Zhejiang, China
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
- State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health of P. R. China, Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - Dandan Zheng
- Wenzhou Medical University, Wenzhou, Zhejiang, China
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
- State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health of P. R. China, Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - LiLi Tu
- Wenzhou Medical University, Wenzhou, Zhejiang, China
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
- State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health of P. R. China, Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
- * E-mail: (XD); (LT)
| | - Xiang Da Dong
- Department of Surgery, Stamford Hospital—Affiliate of Columbia University, Stamford, Connecticut, United States of America
- * E-mail: (XD); (LT)
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MicroRNA-23a enhances migration and invasion through PTEN in osteosarcoma. Cancer Gene Ther 2015; 22:351-9. [PMID: 26160225 DOI: 10.1038/cgt.2015.27] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Revised: 04/07/2015] [Accepted: 04/11/2015] [Indexed: 02/06/2023]
Abstract
To investigate the biological significance of abundant microRNA-23a (miR-23a) expression in osteosarcoma and its correlation with PTEN in the pathogenesis of osteosarcoma migration and invasion. The human osteosarcoma cell lines MG63, HOS58 and SaoS-2, and the human normal osteoblasts (hFOB1.19) were grown in RPMI 1640 medium supplemented with 10% fetal bovine serum. Gene and protein levels of miR-23a and PTEN were examined to determine the molecular relationship between them in the pathogenesis of osteosarcoma. Inhibition of miR-23a effectively reduced migration and invasion of osteosarcoma cell lines. Bioinformatics and luciferase-reporter assay revealed that miR-23a specifically targeted the 3'-untranslational region of PTEN and regulated its expression. Downregulation of PTEN enhanced migration and invasion of osteosarcoma cell lines. Furthermore, in tumor tissues obtained from osteosarcoma patients, the expression of miR-23a was negatively correlated with PTEN and the high expression of miR-23a combined with low expression of PTEN might serve as a risk factor for cancer patients. Besides, miR-23a-mediated suppression of PTEN led to activation of AKT/ERK pathways and epithelial-mesenchymal transition (EMT) in osteosarcoma cells, and finally enhanced the activity of osteosarcoma cell proliferation and movement and promoted osteosarcoma xenograft tumor growth in mouse models. Our study showed that miR-23a, by downregulation of PTEN, enhanced migration and invasion in osteosarcoma cells.
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Assumpção MB, Moreira FC, Hamoy IG, Magalhães L, Vidal A, Pereira A, Burbano R, Khayat A, Silva A, Santos S, Demachki S, Ribeiro-Dos-Santos Â, Assumpção P. High-Throughput miRNA Sequencing Reveals a Field Effect in Gastric Cancer and Suggests an Epigenetic Network Mechanism. Bioinform Biol Insights 2015; 9:111-7. [PMID: 26244015 PMCID: PMC4496000 DOI: 10.4137/bbi.s24066] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 03/29/2015] [Accepted: 04/02/2015] [Indexed: 02/06/2023] Open
Abstract
Field effect in cancer, also called "field cancerization", attempts to explain the development of multiple primary tumors and locally recurrent cancer. The concept of field effect in cancer has been reinforced, since molecular alterations were found in tumor-adjacent tissues with normal histopatho-logical appearances. With the aim of investigating field effects in gastric cancer (GC), we conducted a high-throughput sequencing of the miRnome of four GC samples and their respective tumor-adjacent tissues and compared them with the miRnome of a gastric antrum sample from patients without GC, assuming that tumor-adjacent tissues could not be considered as normal tissues. The global number of miRNAs and read counts was highest in tumor samples, followed by tumor-adjacent and normal samples. Analyzing the miRNA expression profile of tumor-adjacent miRNA, hsa-miR-3131, hsa-miR-664, hsa-miR-483, and hsa-miR-150 were significantly downregulated compared with the antrum without tumor tissue (P-value < 0.01; fold-change <5). Additionally, hsa-miR-3131, hsa-miR-664, and hsa-miR-150 were downregulated (P-value < 0.001) in all paired samples of tumor and tumor-adjacent tissues, compared with antrum without tumor mucosa. The field effect was clearly demonstrated in gastric carcinogenesis by an epigenetics-based approach, and potential biomarkers of the GC field effect were identified. The elevated expression of miRNAs in adjacent tissues and tumors tissues may indicate that a cascade of events takes place during gastric carcinogenesis, reinforcing the notion of field effects. This phenomenon seems to be linked to DNA methylation patterns in cancer and suggests the involvement of an epigenetic network mechanism.
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Affiliation(s)
- Monica B Assumpção
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, PA, Brazil
| | - Fabiano C Moreira
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Centro Universitário do Estado do Pará, Belém, Pará, Brazil
| | - Igor G Hamoy
- Universidade Federal Rural da Amazônia, Capanema, PA, Brazil
| | - Leandro Magalhães
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Amanda Vidal
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Adenilson Pereira
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Rommel Burbano
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil
| | - André Khayat
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil
| | - Artur Silva
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Sidney Santos
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil
| | - Samia Demachki
- Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil. ; Instituto de Ciências da Saúde, Universidade Federal do Pará, Belém, PA, Brazil
| | - Ândrea Ribeiro-Dos-Santos
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil
| | - Paulo Assumpção
- Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, PA, Brazil. ; Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil
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Li S, Li X, Zhao H, Gao M, Wang F, Li W. Overexpression of microRNA‑125a‑3p effectively inhibits the cell growth and invasion of lung cancer cells by regulating the mouse double minute 2 homolog/p53 signaling pathway. Mol Med Rep 2015; 12:5482-6. [PMID: 26151241 DOI: 10.3892/mmr.2015.4038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 01/29/2015] [Indexed: 11/05/2022] Open
Abstract
MicroRNAs (miRs) are a family of small non-coding RNAs that are 21‑24 nucleotides in length. Decreased expression of hsa‑miR‑125a‑3p is observed in a number of patients with non‑small cell lung cancer; however, it is not clear how this miRNA regulates the growth and invasion of lung tumor cells. The aim of the present study was to identify the function of hsa‑miR‑125a‑3p in the growth and invasion of lung cancer cells. The expression of hsa‑miR‑125a‑3p in the A549, NCI‑H460 and SPCA‑1 lung cancer cell lines was analyzed by reverse transcription‑quantitative polymerase chain reaction and the human bronchiolar epithelium cell line (HBE) was used as a control. The results demonstrated that the expression of hsa‑miR‑125a‑3p was significantly lower in NCI‑H460, A549 and SPCA‑1 cells, compared with that in HBE cells. Overexpression of sense miR‑125a‑3p in the A549 lung cancer cell line inhibited cell proliferation for 5‑7 days (P<0.01), and transfection of antisense miR‑125a‑3p did not suppress the cell growth of the lung cancer cells. In addition, overexpression of miR‑125a‑3p in the NCI‑H460 lung cancer cell line markedly induced cell apoptosis, which was detected by fluorescence‑activated cell sorting with annexin V‑fluorescein isothiocyanate/propidium iodide staining. The results of the Transwell migration assay also revealed that transfection of miR‑125a‑3p resulted in decreased migration of lung cancer tumor cells. The pro‑apoptotic gene p53 expression was detected by western blot analysis. The results revealed that the expression of mouse double minute (MDM)‑2 homolog, the principal cellular antagonist of p53, was decreased and p53 expression was upregulated in sense has‑miR‑125a‑3p transfected A549 cells. This was consistent with that observed in NCI‑H460 cells, suggesting that hsa‑miR‑125a‑3p may be involved in the regulation of the MDM2/p53 signaling pathway in lung cancer cells. In conclusion, overexpression of hsa‑miR‑125a‑3p significantly inhibited the proliferation and invasion of lung cancer cells, which may aid in determining the mechanisms underlying the development of lung cancer.
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Affiliation(s)
- Shenglei Li
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Xin Li
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Huasi Zhao
- Department of Respiratory, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Ming Gao
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Feng Wang
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Wencai Li
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
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27
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Sisic L, Vallböhmer D, Stoecklein NH, Blank S, Schmidt T, Driemel C, Möhlendick B, Knoefel WT, Odenthal M, Ott K. Serum microRNA profiles as prognostic or predictive markers in the multimodality treatment of patients with gastric cancer. Oncol Lett 2015; 10:869-874. [PMID: 26622585 DOI: 10.3892/ol.2015.3341] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2014] [Accepted: 02/27/2015] [Indexed: 12/22/2022] Open
Abstract
Despite the implementation of multimodality treatment strategies, the persistently poor prognosis of gastric cancer patients is predominantly caused by the lack of predictive markers for response assessment in the neoadjuvant setting, preventing individualized therapy. Therefore, the identification of novel predictive and prognostic markers for application in the multimodality treatment of gastric cancer patients is required. The aim of the present study was to characterize the serum microRNA (miRNA/miR) profile of gastric cancer patients undergoing multimodality therapy to identify possible prognostic and predictive markers. The study consisted of 32 patients with gastric cancer who had undergone either primary surgical resection (n=14) or neoadjuvant therapy followed by surgical resection (n=18). Histopathological regression was defined as a major histopathological response when the resected specimens contained <10% vital residual tumor cells. Intratumoral miRNA was isolated from pre-operative or post-neoadjuvant blood serum samples. Initially, microarray analyses were performed in six of the patients that received neoadjuvant treatment (three responders versus three non-responders), to assess the amplification profile of dysregulated miRNAs. Based on these findings, possible predictive or prognostic markers were validated in all study patients by performing single reverse transcription-polymerase chain reaction (RT-PCR) analysis. Depending on the extent of the histopathological regression, a differential miRNA expression profile was identified in the microarray analyses. Based on the amplification profile, miR-21, miR-29a and miR-221 were selected for additional validation. However, the single RT-PCR measurements of the three selected miRNAs did not exhibit any prognostic or predictive value in the patients treated with primary resection or neoadjuvant therapy and resection. Thus, the current pilot study failed to identify a prognostic or predictive value in selected miRNAs using single RT-PCR measurements, however, the microarray results revealed a differential microRNA expression profile depending on the histopathological regression. The findings of the present study may have been affected by the small sample size.
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Affiliation(s)
- Leila Sisic
- Department of General, Visceral, Pediatric and Vascular Surgery, University of Heidelberg, Heidelberg D-69115, Germany
| | - Daniel Vallböhmer
- Department of General, Visceral and Pediatric Surgery, University of Düsseldorf, Düsseldorf D-40225, Germany
| | - Nikolas H Stoecklein
- Department of General, Visceral and Pediatric Surgery, University of Düsseldorf, Düsseldorf D-40225, Germany
| | - Susanne Blank
- Department of General, Visceral, Pediatric and Vascular Surgery, University of Heidelberg, Heidelberg D-69115, Germany
| | - Thomas Schmidt
- Department of General, Visceral, Pediatric and Vascular Surgery, University of Heidelberg, Heidelberg D-69115, Germany
| | - Christiane Driemel
- Department of General, Visceral and Pediatric Surgery, University of Düsseldorf, Düsseldorf D-40225, Germany
| | - Birte Möhlendick
- Department of General, Visceral and Pediatric Surgery, University of Düsseldorf, Düsseldorf D-40225, Germany
| | - Wolfram T Knoefel
- Department of General, Visceral and Pediatric Surgery, University of Düsseldorf, Düsseldorf D-40225, Germany
| | | | - Katja Ott
- Department of General, Visceral, Pediatric and Vascular Surgery, University of Heidelberg, Heidelberg D-69115, Germany
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Cheng Y, Zhou J, Li H. Clinicopathologic Implications of Eukaryotic Initiation Factor 3f and Her-2/neu Expression in Gastric Cancer. Clin Transl Sci 2015; 8:320-5. [PMID: 25684180 DOI: 10.1111/cts.12263] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND To detect the expression of eIF3f and human epidermal growth factor receptor 2 (Her-2)/neu in gastric cancer (GC), correlation with their clinicopathological parameters and the relationship of eIF3f and Her-2/neu in the occurrence and development of GC. METHODS A total of 195 gastrectomy specimens with stage I to III were examined for eIF3f expression by immunohistochemistry and for Her-2/neu expression by fluorescence in situ hybridization (FISH) with the median follow-up period of 38 months. RESULTS The positive expression rate of eIF3f in GC and adjacent noncancerous tissue were 33.8% and 59.5%, respectively. eIF3f levels were linked to more advanced tumor stages and likelihood of recurrence (all p < 0.05). The Kaplan-Meier survival curves indicated that decreased expression of eIF3f could serve as a prognosis marker for poor outcome of GC patients (p = 0.04). 15.9% of GC specimens were positive for Her-2/neu, but whose expression was of no correlation with patients' survival. Patients who were positive for Her-2/neu also had high eIF3f expression levels (p = 0.0295). CONCLUSION Results suggest that eIF3f may play an important role in recurrence, thus representing a promising predictive marker for the prognosis of GC. But Her-2/neu has no relationship with the prognosis of GC. The clinical significance of eIF3f and Her-2/neu remains to be further investigated.
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Affiliation(s)
- Yu Cheng
- Department of First Medical Oncology, Affiliated Yantai Yuhuangding Hospital of Qingdao University Medical, Yantai, Shandong, China
| | - Jin Zhou
- Department of Endocrinology, Affiliated Yantai Yuhuangding Hospital of Qingdao University Medical, Yantai, Shandong, China
| | - Honglun Li
- Department of Radiology, Affiliated Yantai Yuhuangding Hospital of Qingdao University Medical, Yantai, Shandong, China
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29
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Zhao J, Liu Y, Huang G, Cui P, Zhang W, Zhang Y. Long non-coding RNAs in gastric cancer: versatile mechanisms and potential for clinical translation. Am J Cancer Res 2015; 5:907-927. [PMID: 26045977 PMCID: PMC4449426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 02/01/2015] [Indexed: 06/04/2023] Open
Abstract
Gastric cancer (GC) remains a serious threat to many people, representing the second leading cause of cancer-related death worldwide. The lack of early diagnostic biomarkers, effective prognostic indicators and therapeutic targets all account for the poor prognosis of GC. Therefore, the identification of novel molecular biomarkers for early diagnosis, therapeutic response, and prognosis are urgently needed. High-throughput sequencing has identified a large number of transcribed long non-coding RNAs (lncRNAs) throughout the human genome. Accumulating evidence demonstrates that these lncRNAs play multiple roles in regulating gene expression at the transcriptional, post-transcriptional, and epigenetic levels. Aberrant expression of lncRNAs occurs in various pathological processes, including GC. Many dysregulated lncRNAs in GC have been significantly associated with a larger tumor size, higher degree of tumor invasion, lymph node and distant metastasis, and poorer survival outcome. In this review, we will provide an overview of the pathogenesis of GC, the characteristics and regulatory functions of lncRNAs, and the versatile mechanisms of lncRNAs in GC development, as well as evaluate the translational potential of lncRNAs as novel diagnostic and prognostic biomarkers and therapeutic targets in GC.
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Affiliation(s)
- Jing Zhao
- Department of Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan UniversityShanghai 200040, China
| | - Yongchao Liu
- Department of General Surgery, Huashan Hospital, Shanghai Medical College, Fudan UniversityShanghai 200040, China
| | - Guangjian Huang
- Department of General Surgery, Huashan Hospital, Shanghai Medical College, Fudan UniversityShanghai 200040, China
| | - Peng Cui
- Department of Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan UniversityShanghai 200040, China
| | - Wenhong Zhang
- Department of Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan UniversityShanghai 200040, China
| | - Ying Zhang
- Department of Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan UniversityShanghai 200040, China
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins UniversityBaltimore, Maryland 21205, USA
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30
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Yang XD, Xu XH, Zhang SY, Wu Y, Xing CG, Ru G, Xu HT, Cao JP. Role of miR-100 in the radioresistance of colorectal cancer cells. Am J Cancer Res 2015; 5:545-559. [PMID: 25973296 PMCID: PMC4396051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Accepted: 02/15/2015] [Indexed: 06/04/2023] Open
Abstract
The prognosis of radioresistant colorectal cancer (CRC) is generally poor. Abnormal expression of microRNAs (miRNAs) is involved in the radiosensitivity of various tumor cells as these RNAs regulate biological signaling pathways. However, radioresistance-associated miRNAs in CRC have not yet been identified. In this study, we filtered out HCT116 and CCL-244 from seven CRC cell lines that showed the highest difference in radiosensitivity in a clonogenic assay. MiRNA sequencing identified 33 differentially expressed miRNAs (13 up-regulated and 20 down-regulated) in CCL-244 and 37 in HCT116 (20 up-regulated and 17 down-regulated) cells. MiR-100 was significantly down-regulated in CCL-244 cells after X-ray irradiation but not in HCT116 cells. Quantitative real-time PCR showed that the expression of miR-100 in CRC tissues was significantly lower than that in normal tissues. Thus, miR-100 seems to be involved in the radioresistance of CCL-244 cells. MiR-100 up-regulation sensitized CCL-244 cells to X-ray irradiation, which probably led to apoptosis and DNA double-strand breaks in these. In conclusion, to our knowledge, this is the first study to show that miR-100 may play an important role in regulating the radiosensitivity of CRC, and it may act as a new clinical target for CRC radiotherapy.
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Affiliation(s)
- Xiao-Dong Yang
- Department of General Surgery, The Second Affiliated Hospital of Soochow University No. 1055, Suzhou 215004, China
| | - Xiao-Hui Xu
- Department of General Surgery, The First People's Hospital of Taicang City, Taicang Affiliated Hospital of Soochow University No. 58, Taicang, Suzhou 215400, China
| | - Shu-Yu Zhang
- School of Radiation Medicine and Protection and Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, Medical College of Soochow University Suzhou 215123, China ; Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions and School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University Suzhou 215123, China
| | - Yong Wu
- Department of General Surgery, The Second Affiliated Hospital of Soochow University No. 1055, Suzhou 215004, China
| | - Chun-Gen Xing
- Department of General Surgery, The Second Affiliated Hospital of Soochow University No. 1055, Suzhou 215004, China
| | - Gan Ru
- Department of General Surgery, The Second Affiliated Hospital of Soochow University No. 1055, Suzhou 215004, China
| | - Hong-Tao Xu
- Department of General Surgery, The Second Affiliated Hospital of Soochow University No. 1055, Suzhou 215004, China
| | - Jian-Ping Cao
- School of Radiation Medicine and Protection and Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, Medical College of Soochow University Suzhou 215123, China ; Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions and School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University Suzhou 215123, China
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Chen G, Tang Y, Wu JH, Liu FH. Role of microRNAs in diagnosis and treatment of the pathogenesis of gastric cancer. Int J Clin Exp Med 2014; 7:5947-57. [PMID: 25664140 PMCID: PMC4307587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 12/08/2014] [Indexed: 06/04/2023]
Abstract
We aim to detect the miRNAs that are correlated with the gastric cancer cell line SGC-7901 to provide theoretical basis for clinical application. We first analyzed miRNA expression profiles of gastric cancer patients compared with normal controls by microarray analysis and validated the results by real-time qPCR. We also determined the absolute copy numbers of these three miRNAs in normal adults. The results showed that three miRNAs (miR-150, miR-23a, and miR-130a) were identified to significantly decrease in expanded 38 gastric cancer patients compared with 90 normal controls. Molecular and statistical analysis showed that the decreased miRNAs were significant in clinical analysis. Generally speaking, this finding suggest vital roles of these miRNAs in human gastric cancer genesis and as potential biomarkers in gastric cancer diagnosis.
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Affiliation(s)
- Gang Chen
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University Wuhan, China
| | - Yong Tang
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University Wuhan, China
| | - Jiang-Hua Wu
- Departments of Gynecological Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital Tianjin, China
| | - Feng-Hua Liu
- Departments of Gynecological Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital Tianjin, China
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32
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Yu C, Xue J, Zhu W, Jiao Y, Zhang S, Cao J. Warburg meets non-coding RNAs: the emerging role of ncRNA in regulating the glucose metabolism of cancer cells. Tumour Biol 2014; 36:81-94. [DOI: 10.1007/s13277-014-2875-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 11/18/2014] [Indexed: 12/26/2022] Open
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Du Y, Wang D, Luo L, Guo J. miR-129-1-3p promote BGC-823 cell proliferation by targeting PDCD2. Anat Rec (Hoboken) 2014; 297:2273-9. [PMID: 25111461 DOI: 10.1002/ar.23003] [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] [Received: 12/03/2013] [Accepted: 06/26/2014] [Indexed: 01/13/2023]
Abstract
MicroRNAs (miRNAs) are the class of small noncoding RNAs, and play an important role in the regulation of gene expression at the posttranscriptional level. In this study, we explored the effect of miR-129-1-3p on the growth and cell cycle of human gastric cancer cell line BGC-823. The miR-129-1-3p mimics or inhibitors were transfected into the BGC-823 cell line, and the cell cycle and cell growth was measured by flow cytometry and real-time cell analyzer, respectively. The possible targets of miR-129-1-3p were analyzed by quantitative real time-PCR (QRT-PCR), Western blotting and Luciferase reporter assay. The results showed that miR-129-1-3p could promote the growth and cell cycle of BGC-823 cells. Although protein expression of programmed cell death 2 (PDCD2) was not changed with miR-129-1-3p, QRT-PCR showed that expression of PDCD2 mRNA was negatively related to the miR-129-1-3p. Luciferase reporter assay revealed that PDCD2 is one of the targets of miR-129-1-3p. Our results indicated that miR-129-1-3p might promote proliferation of BGC-823 cells by targeting PDCD2.
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Affiliation(s)
- Yantao Du
- Zhejiang Provincial Key Laboratory of Pathophysiology, Medical School of Ningbo University, Zhejiang, China; Ningbo Institute of Medical Sciences, Medical School of Ningbo University, Ningbo, Zhejiang, China
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Li G, Wang N, Sun C, Li B. Decreased expression of eukaryotic initiation factor 3f is an adverse prognostic factor for stage I-III gastric cancer. World J Surg Oncol 2014; 12:72. [PMID: 24678890 PMCID: PMC4046624 DOI: 10.1186/1477-7819-12-72] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 03/16/2014] [Indexed: 12/20/2022] Open
Abstract
Background It has been demonstrated that eIF3f expression is significantly decreased in many human cancers, a fact which plays an important role in human cancer. However, the expression of eIF3f in gastric cancer (GC) is not well understood to date. Therefore, the aim of this study is to detect the expression of eIF3f in GC. Methods The expression of eIF3f was examined by immunohistochemistry in tissues with stage I to III GC and adjacent non-cancerous tissues (ANCT) of 195 gastrectomy specimens; clinicopathological results, including survival, were analyzed. Results The positive expression rate of eIF3f was significantly higher in ANCT tissues than in GC. eIF3f levels were correlated with more advanced tumor stages and likelihood of recurrence (all P <0.05). The Kaplan-Meier survival curves indicated that decreased expression of eIF3f could serve as a prognosis marker for poor outcome of GC patients (P = 0.04). Conclusions eIF3f may play an important role in recurrence, thus representing a promising predictive marker for the prognosis of GC.
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Affiliation(s)
- Guanghua Li
- Department of General Surgery, The Second Hospital of Shandong University, 247th Beiyuan Avenue, Jinan 250200, China.
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Wang X, Yu H, Lu X, Zhang P, Wang M, Hu Y. MiR-22 suppresses the proliferation and invasion of gastric cancer cells by inhibiting CD151. Biochem Biophys Res Commun 2014; 445:175-9. [PMID: 24495805 DOI: 10.1016/j.bbrc.2014.01.160] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 01/27/2014] [Indexed: 12/11/2022]
Abstract
Gastric cancer (GC) is the second common cause of cancer-related death worldwide. microRNAs (miRNAs) play important roles in the carcinogenesis of GC. Here, we found that miR-22 was significantly decreased in GC tissue samples and cell lines. Ectopic overexpression of miR-22 remarkably suppressed cell proliferation and colony formation of GC cells. Moreover, overexpression of miR-22 significantly suppressed migration and invasion of GC cells. CD151 was found to be a target of miR-22. Furthermore, overexpression of CD151 significantly attenuated the tumor suppressive effect of miR-22. Taken together, miR-22 might suppress GC cells growth and motility partially by inhibiting CD151.
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Affiliation(s)
- Xun Wang
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Honggang Yu
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan 430060, China.
| | - Xinyao Lu
- Department of Gastroenterology, Wuchang Hospital of Wuhan City, Wuhan 430063, China
| | - Peng Zhang
- Department of Gastroenterology, Wuchang Hospital of Wuhan City, Wuhan 430063, China
| | - Minglin Wang
- Department of Gastroenterology, Wuchang Hospital of Wuhan City, Wuhan 430063, China
| | - Yikui Hu
- Department of Neurology, Pu Ai Hospital of Wuhan City, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430034, China
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Xu X, Yang X, Ru G, Wu Y, Zhang S, Xing C, Wu Y, Cao J. miR-146a gene polymorphism rs2910164 and the risk of digestive tumors: A meta-analysis of 21 case-control studies. Oncol Rep 2013; 31:472-9. [PMID: 24247819 DOI: 10.3892/or.2013.2854] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 10/15/2013] [Indexed: 11/05/2022] Open
Abstract
Digestive tumors have the highest incidence among all tumor types worldwide. miR-146a has been shown to play an important role in the development, apoptosis, invasion and metastasis of digestive tumors. Additionally, a miR-146a gene polymorphism has been associated with the risk of a variety of cancer types in the digestive system. Therefore, in order to investigate the correlation, a meta-analysis of reported data was conducted, for which we obtained 21 research studies concerning the association between the miR-146a gene polymorphism and digestive tumors. Odds ratio (OR) values and 95% confidence intervals (95% CI) were used to assess this association. We found that the miR-146a polymorphism rs2910164 might significantly increase the susceptibility of digestive tumors, in particular for esophageal cancer and colorectal cancers. Furthermore, the miR-146a polymorphism might significantly increase the risk of digestive tumors in Asians. However, no obvious correlation between the polymorphism and the risk for digestive tumors was found in Caucasians.
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Affiliation(s)
- Xiaohui Xu
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou 215004, P.R. China
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