1
|
Zhao H, Jiang R, Zhang C, Feng Z, Wang X. The regulatory role of cancer stem cell marker gene CXCR4 in the growth and metastasis of gastric cancer. NPJ Precis Oncol 2023; 7:86. [PMID: 37679408 PMCID: PMC10484911 DOI: 10.1038/s41698-023-00436-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 08/17/2023] [Indexed: 09/09/2023] Open
Abstract
Single-cell RNA sequencing (scRNA-seq) and bulk RNA sequencing (bulk RNA-seq) are increasingly used for screening genes involved in carcinogenesis due to their capacity for dissecting cellular heterogeneity. This study aims to reveal the molecular mechanism of the cancer stem cells (CSCs) marker gene CXCR4 in gastric cancer (GC) growth and metastasis through scRNA-seq combined with bulk RNA-seq. GC-related scRNA-seq data were downloaded from the GEO database, followed by UMAP cluster analysis. Non-malignant cells were excluded by the K-means algorithm. Bulk RNA-seq data and clinical sample information were downloaded from the UCSC Xena database. GO and KEGG pathway analyses validated the correlation between genes and pathways. In vitro and in vivo functional assays were used to examine the effect of perturbed CXCR4 on malignant phenotypes, tumorigenesis, and liver metastasis. A large number of highly variable genes were identified in GC tissue samples. The top 20 principal components were selected, and the cells were clustered into 6 cell types. The C4 cell cluster from malignant epithelial cells might be CSCs. CXCR4 was singled out as a marker gene of CSCs. GC patients with high CXCR4 expression had poor survival. Knockdown of CXCR4 inhibited the malignant phenotypes of CSCs in vitro and curtailed tumorigenesis and liver metastasis in nude mice. CSC marker gene CXCR4 may be a key gene facilitating malignant phenotypes of CSCs, which thus promotes tumor growth and liver metastasis of GC.
Collapse
Affiliation(s)
- Hongying Zhao
- Department of Oncology, Xuzhou City Cancer Hospital, Xuzhou Third People's Hospital, Xuzhou Hospital Affiliated to Jiangsu University, Xuzhou, 221000, PR China.
| | - Rongke Jiang
- Department of Oncology, Xuzhou City Cancer Hospital, Xuzhou Third People's Hospital, Xuzhou Hospital Affiliated to Jiangsu University, Xuzhou, 221000, PR China
| | | | | | - Xue Wang
- Department of Oncology, Xuzhou City Cancer Hospital, Xuzhou Third People's Hospital, Xuzhou Hospital Affiliated to Jiangsu University, Xuzhou, 221000, PR China
| |
Collapse
|
2
|
Deng C, Zhang L, Ma X, Cai S, Jia Y, Zhao L. RFTN1 facilitates gastric cancer progression by modulating AKT/p38 signaling pathways. Pathol Res Pract 2022; 234:153902. [DOI: 10.1016/j.prp.2022.153902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 04/06/2022] [Accepted: 04/15/2022] [Indexed: 10/18/2022]
|
3
|
Chen N, Han X, Yin B, Bai X, Wang Y. FGD5 facilitates tumor growth by regulating EGFR ubiquitination in gastric cancer. Biochem Biophys Res Commun 2021; 562:43-49. [PMID: 34034092 DOI: 10.1016/j.bbrc.2021.04.106] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 04/26/2021] [Indexed: 01/19/2023]
Abstract
FGD5 (faciogenital dysplasia-5), a Rho-family guanine nucleotide exchange factor, has been identified as a key regulator of endothelial cells angiogenesis and apoptosis. However, the expression and role of FGD5 in the pathogenesis of gastric cancer remain unknown. In the present study, we first detected FGD5 expression in tumor tissues of different stages by immunofluorescence and confirmed that FGD5 expression was associated with stages in human gastric cancer. Knockdown FGD5 by shRNA in 7901 and BGC823 human gastric cells lines inhibited tumorigenesis and migration in vivo and in vitro. Mechanistically, co-immunoprecipitation (Co-IP) assay showed that FGD5 interacted with EGFR and decreased EGFR ubiquitination. Additionally, FGD5 sustained the activation of EGFR downstream signaling molecules, including STAT3 and pSTAT3. Furthermore, we showed that FGD5 could induce resistance to chemotherapy 5Fu/CIS, however, a well-known STAT3 inhibitor FLL32 could reverse FGD5-induced chemotherapy resistance in vivo. In conclusion, we are the first to demonstrate that FGD5 expression was associated with tumor stage and proliferation in gastric cancer and targeting FGD5 might be a potential therapeutic target for EGFR-STAT3 resistance gastric cancer.
Collapse
Affiliation(s)
- Na Chen
- Department of General Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, Liaoning Province, China
| | - Xiangdong Han
- Department of General Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, Liaoning Province, China
| | - Bo Yin
- Department of General Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, Liaoning Province, China
| | - Xue Bai
- Department of General Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, Liaoning Province, China
| | - Yubin Wang
- Department of General Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou City, Liaoning Province, China.
| |
Collapse
|
4
|
Celastrol Induces Necroptosis and Ameliorates Inflammation via Targeting Biglycan in Human Gastric Carcinoma. Int J Mol Sci 2019; 20:ijms20225716. [PMID: 31739592 PMCID: PMC6888087 DOI: 10.3390/ijms20225716] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 10/26/2019] [Accepted: 11/12/2019] [Indexed: 02/07/2023] Open
Abstract
Celastrol, a triterpene isolated from the root of traditional Chinese medicine Thunder of God Vine, possesses anti-cancer and anti-inflammatory activity to treat rheumatoid disease or as health product. Necroptosis is considered as a new approach to overcome chemotherapeutics resistance. However, whether celastrol exerts necroptosis leading to gastric cancer cell death is still unclear. Here, for the first time we showed that celastrol induced necroptosis in HGC27 and AGS gastric cancer cell lines. More importantly, celastrol down-regulated biglycan (BGN) protein, which is critical for gastric cancer migration and invasion. Furthermore, celastrol activated receptor-interacting protein 1 and 3 (RIP1 and RIP3) and subsequently promoted the translation of mixed-lineage kinase domain-like (MLKL) from cytoplasm to plasma membrane, leading to necroptosis of gastric cancer cell, which was blocked by over-expression BGN. In addition, celastrol suppressed the release of pro-inflammatory cytokines TNF-α and IL-8 in HGC27 and AGS cells, which was reversed by over-expression BGN. Taken together, we identified celastrol as a necroptosis inducer, activated RIP1/RIP3/MLKL pathway and suppressed the level of pro-inflammatory cytokines by down-regulating BGN in HGC-27 and AGS cells, which supported the feasibility of celastrol in gastric cancer therapy.
Collapse
|
5
|
Mohamed WA, Schaalan MF, Ramadan B. The expression profiling of circulating miR-204, miR-182, and lncRNA H19 as novel potential biomarkers for the progression of peptic ulcer to gastric cancer. J Cell Biochem 2019; 120:13464-13477. [PMID: 30945348 DOI: 10.1002/jcb.28620] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 02/17/2019] [Accepted: 02/28/2019] [Indexed: 12/17/2022]
Abstract
Deregulation of noncoding RNAs, microRNAs (miRNAs) and long noncoding RNA (lncRNA), are implicated in the initiation and progression of gastric cancer (GC). This study is a pilot case-control study carried out on 75 subjects, 40 of them were Helicobacter pylori-gastric ulcer patients and 35 were GC patients recruited from the Gastrointestinal Endoscopy Unit in Al-Kasr Al-Aini Hospital, Cairo University in Egypt. Real-time PCR was performed to evaluate the expression level of serum miR-204, miR-182, and lncRNA H19 in patients with peptic ulcer-progressed GC vs nonprogressed peptic ulcer patients. Fibroblast growth factor 18 (FGF-18)/FGF receptor 2 (FGFR2) expression and their downstream immunological and inflammatory signaling markers were assessed and their association with the addressed noncoding RNAs investigated. As regards miR-204 and miR-182, they were significantly increased (12.5 and 2.6 folds, respectively) in GU samples, compared with those of healthy control levels. The elevated levels of these miRNAs were significantly de-escalated in GC samples compared with GU and the fold decrease valued 2.2 fold for miR-204 and 1.8 folds for miR-182. On the other hand, the significant escalation in the level of lnRNA H19 in GU recorded a 16.6 fold increase and further elevation in its levels was evident in GC samples. The herein assessed miRNAs are correlated with disease duration and FGFR2 with miR-182 being significantly correlated with all inflammatory markers, TAC, INF-γ, matrix metallopeptidase 9, and FGF-18. In terms of diagnostic accuracy of assessed miRNAs (stages III to IV), the receiver operating characteristic analysis indicated that serum lncRNA H19 showed the highest diagnostic accuracy (95.5%), specificity (100%), and sensitivity (90.9%), compared with miR-204 and miR-182, which showed the same specificity (60%), sensitivity (72.7%), and diagnostic accuracy (68.8%). Our findings conclude that lnRNA H19, miR-204, and miR-182 may function as novel prospective plasma biomarkers to detect GC and its progression from H. pylori-peptic ulcer, which would be helpful to improve the theranostics of GC.
Collapse
Affiliation(s)
- Waleed A Mohamed
- Department of Chemistry, Kasr El Aini Teaching Hospital, Cairo University, Cairo, Egypt
| | - Mona F Schaalan
- Department of Clinical Pharmacy and Pharmacy Practice, Clinical and Translational Research Unit, Faculty of Pharmacy, Misr International University, Cairo, Egypt
| | - Basma Ramadan
- Department of Physiology, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| |
Collapse
|
6
|
Lu J, Lin JX, Zhang PY, Sun YQ, Li P, Xie JW, Wang JB, Chen QY, Cao LL, Lin Y, Huang CM, Zheng CH. CDK5 suppresses the metastasis of gastric cancer cells by interacting with and regulating PP2A. Oncol Rep 2018; 41:779-788. [PMID: 30431123 PMCID: PMC6312987 DOI: 10.3892/or.2018.6860] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 10/16/2018] [Indexed: 02/07/2023] Open
Abstract
Several previous studies have demonstrated that cyclin‑dependent kinase (CDK)‑5 expression serves an important role in promoting the development of malignant tumours. We have previously reported that CDK5 suppresses gastric tumourigenesis. The aim of the present study was to investigate the mechanistic basis of CDK5. The results of immunoprecipitation and western blot analysis demonstrated that CDK5 could interact with serine/threonine‑protein phosphatase 2A (PP2A). The use of an inhibitor of PP2A in CDK5‑overexpressing gastric cancer (GC) cell lines antagonized CDK5‑mediated suppression in GC cells. Further analysis revealed that PP2A expression was downregulated in GC and patients with low levels of PP2A had worse survival outcomes than those with high levels of PP2A (P=0.035). Therefore, the present study provided a novel mechanism for CDK5‑mediated tumour suppression, suggesting that CDK5 may be an attractive target for future therapeutic strategies for treating GC. In addition, low levels of PP2A may indicate a tendency for poor prognosis in patients with GC.
Collapse
Affiliation(s)
- Jun Lu
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Jian-Xian Lin
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Peng-Yang Zhang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Yu-Qin Sun
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Ping Li
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Jian-Wei Xie
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Jia-Bin Wang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Qi-Yue Chen
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Long-Long Cao
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Yao Lin
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350000, P.R. China
| | - Chang-Ming Huang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Chao-Hui Zheng
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| |
Collapse
|
7
|
Zhu T, Hu X, Wei P, Shan G. Molecular background of the regional lymph node metastasis of gastric cancer. Oncol Lett 2018; 15:3409-3414. [PMID: 29556271 DOI: 10.3892/ol.2018.7813] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 12/04/2017] [Indexed: 12/13/2022] Open
Abstract
Gastric cancer (GC) is one of the deadliest types of cancer in the world. Lymph node (LN) metastasis is a complex and malignant behavior of GC, involving a sequence of biological processes, including decreased adherence to adjacent cells, extracellular matrix (ECM) degradation and lymphatic channel permeation. LN metastasis is directly associated with the treatment response, local recurrence and long-term survival of patients with GC. Therefore, the molecular mechanisms of LN metastasis in GC development require further investigation. Recently, a large number of clinical studies have focused on the molecular mechanisms and biological markers of tumor invasion and metastasis. However, few articles have broadly summarized LN metastasis in GC, and the molecular mechanisms of LN metastasis are not yet fully understood. In the present review, the molecular mechanisms of LN metastasis in GC will be discussed, including the following aspects: Cell adhesion and movement, ECM degradation, new vessel formation, and molecular pattern differences between metastatic LNs and the primary tumor. This review may lead to a better understanding of LN metastasis in GC, and the identification of new diagnostic markers.
Collapse
Affiliation(s)
- Tong Zhu
- Department of Oncology, Changzheng Hospital, The Second Military Medical University, Shanghai 200003, P.R. China
| | - Xueqian Hu
- Department of Oncology, Ningbo Municipal Hospital of Traditional Chinese Medicine, Ningbo, Zhejiang 315000, P.R. China
| | - Pinkang Wei
- Department of Traditional Chinese Medicine, Changzheng Hospital, The Second Military Medical University, Shanghai 200003, P.R. China
| | - Guangzhi Shan
- Department of Oncology, Ningbo Municipal Hospital of Traditional Chinese Medicine, Ningbo, Zhejiang 315000, P.R. China
| |
Collapse
|
8
|
Yu J, Tian X, Chang J, Liu P, Zhang R. RUNX3 inhibits the proliferation and metastasis of gastric cancer through regulating miR-182/HOXA9. Biomed Pharmacother 2017; 96:782-791. [DOI: 10.1016/j.biopha.2017.08.144] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 08/25/2017] [Accepted: 08/28/2017] [Indexed: 01/11/2023] Open
|
9
|
Zhou Y, Wang Y, Wen J, Zhao H, Dong X, Zhang Z, Wang S, Shen L. Aquaporin 3 promotes the stem-like properties of gastric cancer cells via Wnt/GSK-3β/β-catenin pathway. Oncotarget 2017; 7:16529-41. [PMID: 26918728 PMCID: PMC4941333 DOI: 10.18632/oncotarget.7664] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 02/11/2016] [Indexed: 12/13/2022] Open
Abstract
Cancer stem cells (CSCs) are believed to contribute to the tumor growth in gastric carcinoma (GC), a common lethal malignancy. This study investigated the effect of aquaporin 3 (AQP3) on stem-like properties of human GC cells. Elevated AQP3 expression was associated with CD44 expression in human GC specimens. Expression of AQP3 and that of CD44 positively correlated with Lauren classification, lymph node metastasis, and lymphovascular invasion. Altering the AQP3 expression had pronounced effects on the tumorigenic potential and self-renewal capacity of the gastric cancer cell lines SGC7901, MGC803, and AGS, both in vitro and in vivo. Overexpression of AQP3 induced CD44 expression and activation of the β-catenin signaling pathway, whereas silencing AQP3 expression using short hairpin RNA had the opposite effect. Furthermore, pharmacological inhibition of GSK-3β using LiCl impaired the effect of AQP3 knockdown in CSCs, whereas the inhibition of the Wnt/β-catenin pathway by XAV939 blocked the effect of AQP3 overexpression. These results demonstrate that AQP3 promotes stem-like properties of human GC cells by activating the Wnt/GSK-3β/β-catenin signaling pathway.
Collapse
Affiliation(s)
- Yangchun Zhou
- Division of Gastrointestinal Surgery, Department of General Surgery, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China.,Department of General Surgery, Sir Run Run Shaw Hospital, Third Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yao Wang
- Division of Gastrointestinal Surgery, Department of General Surgery, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jianfei Wen
- Division of Gastrointestinal Surgery, Department of General Surgery, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Haijian Zhao
- Division of Gastrointestinal Surgery, Department of General Surgery, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China.,Division of Gastrointestinal Surgery, Department of General Surgery, Affiliated Huai'an Hospital, Xuzhou Medical College, Huai'an, Jiangsu, China
| | - Xuqiang Dong
- Division of Gastrointestinal Surgery, Department of General Surgery, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Zhihong Zhang
- Department of Pathology, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Shoulin Wang
- School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Lizong Shen
- Division of Gastrointestinal Surgery, Department of General Surgery, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| |
Collapse
|
10
|
Zhao LY, Tong DD, Xue M, Ma HL, Liu SY, Yang J, Liu YX, Guo B, Ni L, Liu LY, Qin YN, Wang LM, Zhao XG, Huang C. MeCP2, a target of miR-638, facilitates gastric cancer cell proliferation through activation of the MEK1/2-ERK1/2 signaling pathway by upregulating GIT1. Oncogenesis 2017; 6:e368. [PMID: 28759023 PMCID: PMC5541712 DOI: 10.1038/oncsis.2017.60] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 05/02/2017] [Accepted: 06/07/2017] [Indexed: 02/08/2023] Open
Abstract
Methyl-CpG binding protein 2 (MeCP2) is involved in the carcinogenesis and progression of multiple types of cancer. However, its precise role in gastric cancer (GC) and the relevant molecular mechanism remain unknown. In the present study, we found that miR-638 levels were lower in GC tissues and GC cell lines than in adjacent normal tissues and normal gastric epithelial cell lines, respectively. Low miR-638 levels were associated with poor tumor differentiation, tumor size and lymph node metastasis. MeCP2 expression levels were higher in GC tissues than in adjacent normal tissues. It was found that miR-638 inhibited GC cell proliferation, colony formation, G1–S transition and tumor growth, and induced cell apoptosis by directly targeting MeCP2. MeCP2 promoted GC cell proliferation, colony formation and G1–S cell-cycle transition, and suppressed apoptosis. Molecular mechanistic investigations were performed using an integrated approach with a combination of microarray analysis, chromatin immunoprecipitation sequencing and a reporter gene assay. The results showed that MeCP2 bound to the methylated CpG islands of G-protein-coupled receptor kinase-interacting protein 1 (GIT1) promoter and upregulated its expression, thereby activating the MEK1/2–ERK1/2 signaling pathway and promoting GC cell proliferation. Taken together, our study demonstrates that MeCP2, a target of miR-638, facilitates GC cell proliferation and induces cell-cycle progression through activation of the MEK1/2–ERK1/2 signaling pathway by upregulating GIT1. The findings suggest that MeCP2 plays a significant role in GC progression, and may serve as a potential target for GC therapy.
Collapse
Affiliation(s)
- L Y Zhao
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - D D Tong
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - M Xue
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - H L Ma
- Department of Radiation Oncology, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - S Y Liu
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - J Yang
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Y X Liu
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - B Guo
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - L Ni
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - L Y Liu
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Y N Qin
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - L M Wang
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - X G Zhao
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - C Huang
- Department of Cell Biology and Genetics/Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China.,Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Medical College of Yan'an University, Yan'an, Shaanxi, China
| |
Collapse
|
11
|
Huang H, Chen Z, Ni X. Tissue transglutaminase-1 promotes stemness and chemoresistance in gastric cancer cells by regulating Wnt/β-catenin signaling. Exp Biol Med (Maywood) 2016; 242:194-202. [PMID: 27660242 DOI: 10.1177/1535370216670541] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Gastric cancer is a common malignancy, and is one of the most frequent causes of cancer deaths worldwide. Recently, members of the transglutaminases (TGM) family, especially TGM2, have been implicated in the progression and drug resistance of cancers, but the function of TGM1 in cancer development has been largely overlooked. In this study, we demonstrate the roles of TGM1 in development of gastric cancer. We found that expression levels of TGM1 were upregulated in both gastric cancer tissues and cultured gastric cancer cells, and that TGM1 expression levels were correlated with patient survival. In cultured gastric cancer cells, loss of TGM1 expression inhibited cell proliferation and promoted apoptosis, as well increased gastric cancer cell sensitivity to chemotherapeutic drugs and reducing stemness. These results strongly supported the participation of TGM1 in the regulation of gastric cancer development. In addition, we found evidence that the mechanism of action of TGM1 in regulating gastric cancer cell might involve the Wnt signaling pathway, as loss of TGM1 expression in gastric cancer cells led to a significant suppression of Wnt signaling activities.
Collapse
Affiliation(s)
- Haitao Huang
- 1 Department of General Surgery, Oilfield General Hospital of Daqing, Daqing 163001, China
| | - Zhiqi Chen
- 1 Department of General Surgery, Oilfield General Hospital of Daqing, Daqing 163001, China
| | - Xiuqin Ni
- 2 Department of Anatomy, Harbin Medical University-Daqing, Daqing 163319, China
| |
Collapse
|
12
|
Lee HW, Jang KSB, Choi HJ, Jo A, Cheong JH, Chun KH. Celastrol inhibits gastric cancer growth by induction of apoptosis and autophagy. BMB Rep 2015; 47:697-702. [PMID: 24667175 PMCID: PMC4345515 DOI: 10.5483/bmbrep.2014.47.12.069] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Indexed: 01/25/2023] Open
Abstract
Recently, the interest in natural products for the treatment of cancer is increasing because they are the pre-screened candidates. In the present study, we demonstrate the therapeutic effect of celastrol, a triterpene extracted from the root bark of Chinese medicine on gastric cancer. The proliferation of AGS and YCC-2 cells were most sensitively decreased in six kinds of gastric cancer cell lines after the treatment with celastrol. Celastrol inhibited the cell migration and increased G1 arrest in cell-cycle populations in both cell lines. The treatment with celastrol significantly induced autophagy and apoptosis and increased the expression of autophagy and apoptosis-related proteins. We also found an increase in phosphorylated AMPK following a decrease in all phosphorylated forms of AKT, mTOR and S6K after the treatment with celastrol. Moreover, gastric tumor burdens were reduced in a dose-dependent manner by celastrol administration in a xenografted mice model. Taken together, celastrol distinctly inhibits the gastric cancer cell proliferation and induces autophagy and apoptosis. [BMB Reports 2014; 47(12): 697-702]
Collapse
Affiliation(s)
- Hyun-Woo Lee
- Department of Biochemistry and Molecular Biology, Yonsei University College of Medicine, Seoul 120-752; Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 120-749, Korea
| | - Kenny Seung Bin Jang
- Department of Biochemistry and Molecular Biology, Yonsei University College of Medicine, Seoul 120-752; Asia Pacific International School, Seoul 139-852, Korea
| | - Hye Ji Choi
- Department of Surgery, Yonsei University College of Medicine, Seoul 120-752; Brain Korea 21 Plus Project for Medical Sciences, Severance Medical Research Institute, Seoul 120-752, Republic of Korea
| | - Ara Jo
- Department of Surgery, Yonsei University College of Medicine, Seoul 120-752; Brain Korea 21 Plus Project for Medical Sciences, Severance Medical Research Institute, Seoul 120-752, Republic of Korea
| | - Jae-Ho Cheong
- Department of Surgery, Yonsei University College of Medicine, Seoul 120-752, Brain Korea 21 Plus Project for Medical Sciences, Severance Medical Research Institute, Seoul 120-752, Republic of Korea
| | - Kyung-Hee Chun
- Department of Biochemistry and Molecular Biology, Yonsei University College of Medicine, Seoul 120-752; Brain Korea 21 Plus Project for Medical Sciences, Severance Medical Research Institute, Seoul 120-752, Republic of Korea
| |
Collapse
|
13
|
Liao J, Wen S, Cao L, Zhou Y, Feng Z. Effect of eradication of Helicobacter pylori on expression levels of FHIT, IL-8 and P73 in gastric mucosa of first-degree relatives of gastric cancer patients. PLoS One 2015; 10:e0124576. [PMID: 25875960 PMCID: PMC4397018 DOI: 10.1371/journal.pone.0124576] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 03/06/2015] [Indexed: 12/19/2022] Open
Abstract
Objectives Helicobacter pylori (H. pylori) infection plays an important role in the carcinogenesis and development of gastric cancer. Eradication of H. pylori can effectively reduce the risk of gastric cancer, but the underlying mechanisms are not fully understood. This study aimed to investigate the effect of eradication of H. pylori on the expression levels of FHIT, IL-8 and P73 in the gastric mucosa of first-degree relatives of gastric cancer patients. Methods One hundred and thirty-two patients with functional dyspepsia having first-degree relatives with gastric cancer were prospectively recruited in this study. Nine patients presented with H. pylori infection and family histories of gastric cancer, 61 with H. pylori infection and without family histories of gastric cancer, 6 without H. pylori infection and with family histories of gastric cancer, and 56 without H. pylori infection and family histories of gastric cancer. The protein and mRNA expression levels of FHIT, IL-8 and P73 in gastric mucosa of the subjects were detected by immunohistochemical staining and polymerase chain reaction, respectively. Results Compared with the patients without H. pylori infection and family histories of gastric cancer, both the protein and mRNA levels of FIHT significantly decreased in patients with H. pylori infection and/or family histories of gastric cancer, and both the protein and mRNA levels of IL-8 significantly increased. After eradication of H. pylori, both the protein and mRNA levels of FHIT were significantly higher, and both the protein and mRNA levels of IL-8 were significantly lower. However, H. pylori infection and family histories of gastric cancer had no major effect on P73 expression. Conclusions Down-regulation of FHIT and up-regulation of IL-8 may be involved in the pathogenesis of H. pylori infection in the first-degree relatives of gastric cancer patients.
Collapse
Affiliation(s)
- Juan Liao
- Department of Gastroenterology, The Affiliated Hospital of North Sichuan Medical College, 63 Wenhua Road, Nanchong 637000, Sichuan Province, China
| | - Shichao Wen
- Department of Gastroenterology, The Affiliated Hospital of North Sichuan Medical College, 63 Wenhua Road, Nanchong 637000, Sichuan Province, China
| | - Lipeng Cao
- Department of Gastroenterology, The Affiliated Hospital of North Sichuan Medical College, 63 Wenhua Road, Nanchong 637000, Sichuan Province, China
| | - Yunfeng Zhou
- Department of Gastroenterology, The Affiliated Hospital of North Sichuan Medical College, 63 Wenhua Road, Nanchong 637000, Sichuan Province, China
| | - Zhisong Feng
- Department of Gastroenterology, The Affiliated Hospital of North Sichuan Medical College, 63 Wenhua Road, Nanchong 637000, Sichuan Province, China
- * E-mail:
| |
Collapse
|
14
|
Cao L, Zhou J, Zhang J, Wu S, Yang X, Zhao X, Li H, Luo M, Yu Q, Lin G, Lin H, Xie J, Li P, Hu X, Zheng C, Bu G, Zhang YW, Xu H, Yang Y, Huang C, Zhang J. Cyclin-dependent kinase 5 decreases in gastric cancer and its nuclear accumulation suppresses gastric tumorigenesis. Clin Cancer Res 2015; 21:1419-28. [PMID: 25609066 DOI: 10.1158/1078-0432.ccr-14-1950] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
PURPOSE As a cyclin-independent atypical CDK, the role of CDK5 in regulating cell proliferation in gastric cancer remains unknown. EXPERIMENTAL DESIGN Expression of CDK5 in gastric tumor and paired adjacent noncancerous tissues from 437 patients was measured by Western blotting, immunohistochemistry, and real-time PCR. The subcellular translocation of CDK5 was monitored during gastric cancer cell proliferation. The role of nuclear CDK5 in gastric cancer tumorigenic proliferation and ex vivo xenografts was explored. Furthermore, by screening for compounds in the PubChem database that disrupt CDK5 association with its nuclear export facilitator, we identified a small molecular (NS-0011) that inhibits gastric cancer cell growth. RESULTS CDK5 level was significantly decreased in the majority of gastric tumor tissues, and the reduction of CDK5 correlated with the severity of gastric cancer based on tumor and lymph node metastasis and patient 5-year fatality rate. Nuclear localization of CDK5 was found to be significantly decreased in tumor tissues and gastric cancer cell lines, whereas exogenously expression of nucleus-targeted CDK5 inhibited the proliferation and xenograft implantation of gastric cancer cells. Treatment with the small molecule NS-0011, which increases CDK5 accumulation in the nucleus, suppressed both cancer cell proliferation and xenograft tumorigenesis. CONCLUSIONS Our results suggest that low CDK5 expression is associated with poor overall survival in patients with gastric cancer, and nuclear accumulation of CDK5 inhibits the proliferation and tumorigenicity of human gastric cancer cells.
Collapse
Affiliation(s)
- Longlong Cao
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China. Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China
| | - Jiechao Zhou
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China
| | - Junrong Zhang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China. Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China
| | - Sijin Wu
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning, China
| | - Xintao Yang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China. Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China
| | - Xin Zhao
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China
| | - Huifang Li
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China
| | - Ming Luo
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| | - Qian Yu
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| | - Guangtan Lin
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| | - Huizhong Lin
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| | - Jianwei Xie
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| | - Ping Li
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| | - Xiaoqing Hu
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning, China
| | - Chaohui Zheng
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| | - Guojun Bu
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China
| | - Yun-wu Zhang
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China. Cancer Research Center, Xiamen University, Xiamen, Fujian, China
| | - Huaxi Xu
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China. Cancer Research Center, Xiamen University, Xiamen, Fujian, China. Sanford-Burnham Medical Research Institute, La Jolla, California.
| | - Yongliang Yang
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning, China.
| | - Changming Huang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China.
| | - Jie Zhang
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China. Cancer Research Center, Xiamen University, Xiamen, Fujian, China.
| |
Collapse
|
15
|
Wu JH, Yao YL, Gu T, Wang ZY, Pu XY, Sun WW, Zhang X, Jiang YB, Wang JJ. MiR-421 Regulates Apoptosis of BGC-823 Gastric Cancer Cells by Targeting Caspase-3. Asian Pac J Cancer Prev 2014; 15:5463-8. [DOI: 10.7314/apjcp.2014.15.13.5463] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
16
|
Decreased ITIH5 expression is associated with poor prognosis in primary gastric cancer. Med Oncol 2014; 31:53. [PMID: 24913813 DOI: 10.1007/s12032-014-0053-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 05/28/2014] [Indexed: 01/26/2023]
Abstract
Inter-α-trypsin inhibitors (ITIs) are a family of serine protease inhibitors that comprise one light chain and a variable set of heavy chains (ITI heavy chains, ITIHs). ITIH5 is a new member of the ITIH family that contains two domains conserved in all known ITIHs: vault protein IT and von Willebrand type A. Recent studies suggest that ITIH5 expression may be altered in certain types of cancer. This study aimed to investigate ITIH5 expression in clinical tumor specimens from gastric cancer patients and its prognostic value for gastric cancer. ITIH5 expression was detected in fresh gastric cancer tissues (T) and the matched adjacent non-tumor tissues (ANT) using real-time quantitative reverse transcription-PCR and Western blotting. ITIH5 expression was retrospectively detected in 331 paraffin-embedded, banked samples using immunohistochemical staining. ITIH5 mRNA and protein expression was significantly downregulated in gastric cancer tissues compared to the ANT. There was a significant association between ITIH5 expression and histological grade (P = 0.020), N classification (P = 0.047), and clinical stage (P = 0.011). Patients with low ITIH5 expression had shorter survival compared to those with high ITIH5 expression. Multivariate analysis showed that ITIH5 expression was an independent prognostic factor for overall survival of gastric cancer patients (P = 0.034). Our data suggest that ITIH5 could play an important role in gastric cancer and may serve as a valuable prognostic biomarker and potential molecular therapy target for gastric cancer.
Collapse
|
17
|
Chen WQ, Xu B, Mao JW, Wei FX, Li M, Liu T, Jin XB, Zhang LR. Inhibitory Effects of α-Pinene on Hepatoma Carcinoma Cell Proliferation. Asian Pac J Cancer Prev 2014; 15:3293-7. [DOI: 10.7314/apjcp.2014.15.7.3293] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
18
|
Tong F, Cao P, Yin Y, Xia S, Lai R, Liu S. MicroRNAs in gastric cancer: from benchtop to bedside. Dig Dis Sci 2014; 59:24-30. [PMID: 24114043 DOI: 10.1007/s10620-013-2887-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2013] [Accepted: 09/11/2013] [Indexed: 12/11/2022]
Abstract
Gastric carcinogenesis represents a stepwise progression from chronic inflammation to invasive adenocarcinomas and distant metastasis. It has been widely accepted that these pathologic changes are contributed by aberrant activation or inactivation of protein-coding proto-oncogenes and tumor suppressor genes. However, recent discoveries in microRNA research have reshaped our understanding of the role of non-protein-coding genes in carcinogenesis. MicroRNAs (miRNAs) are a family of 18-25-nucleotide small RNAs that negatively regulate gene expression at the post-transcriptional level during various crucial cell processes such as apoptosis, differentiation and development. Changes in miRNA expression profiles have been observed in a variety of human tumors, including gastric cancer. Further studies demonstrated that miRNAs may function as tumor suppressors and oncogenes. These findings have shown great potential of miRNAs as a novel class of therapeutic targets. In addition, it was found that some miRNAs were directly involved in patients with gastric cancer, including prognosis prediction, treatment selection, and in the search for unknown primary sites. MiRNAs have also been proved to be detectable in serum and plasma. In this review, we summarize the function of miRNAs in gastric cancer. Furthermore, we describe the pathophysiological roles of these miRNAs and their clinical potential as diagnostic biomarkers and therapeutic targets.
Collapse
Affiliation(s)
- Fuyi Tong
- First Clinical Medical School, Nanjing University of Chinese Medicine, Nanjing, 210029, People's Republic of China
| | | | | | | | | | | |
Collapse
|
19
|
An updated meta-analysis of transforming growth factor-β1 gene: three polymorphisms with gastric cancer. Tumour Biol 2013; 35:2837-44. [PMID: 24254308 DOI: 10.1007/s13277-013-1408-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 11/07/2013] [Indexed: 02/06/2023] Open
Abstract
To derive a more precise estimation of the relationship between TGF-β1 polymorphisms and gastric cancer (GC) risk, we conducted a meta-analysis of all available case-control studies relating the C-509 T, T869C, and G 915C polymorphisms of the TGF-β1 gene to the risk of developing GC. The effect summary odds ratio (OR) and 95% confidence intervals (CIs) were obtained. Funnel plots and Egger's test were used to estimate publication bias. Finally, 11 studies were included in the final meta-analysis. With respect to C-509 T polymorphism, it was found that significantly increased GC risk was associated with the TT genotype in the recessive genetic model in overall analysis (TT vs. CC + CT: OR = 1.23, 95% CI 1.09-1.38, P(heterogeneity) = 0.13) and in Asian population (TT vs. CC + CT: OR = 1.24, 95% CI 1.10-1.39, P(heterogeneity) = 0.18). With respect to T869C and G915C polymorphisms, no significant association with GC risk was demonstrated in overall analysis and subgroup analyses according to ethnicity for all genetic models. This meta-analysis suggested that the T allele of TGF-β1 509C/T polymorphism is probably the susceptibility factor for GC.
Collapse
|
20
|
Wei B, Song Y, Zhang Y, Hu M. microRNA-449a functions as a tumor-suppressor in gastric adenocarcinoma by targeting Bcl-2. Oncol Lett 2013; 6:1713-1718. [PMID: 24260067 PMCID: PMC3833858 DOI: 10.3892/ol.2013.1609] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Accepted: 09/26/2013] [Indexed: 12/25/2022] Open
Abstract
microRNAs (miRNAs or miRs) may function as oncogenes or tumor suppressors. The present study identified that miR-449a was downregulated in human gastric cancer. The overexpression of miR-449a inhibited gastric adenocarcinoma cell growth and promoted cell apoptosis in the MGC-803 and SGC-7901 gastric adenocarcinoma cell lines. Subsequently, Bcl-2 was identified as a potential miR-449a target by bioinformatics analysis. It was also shown that Bcl-2 was negatively regulated by miR-449a at the post-transcriptional level, via a specific target site within the 3′-untranslated region (3′UTR), by luciferase reporter assay. The expression of miR-449a induced cell apoptosis, as observed by TdT-mediated dUTP nick end labeling and caspase 3/7 assays, and was rescued by Bcl-2 expression. Therefore, these observations indicate that miR-449a acts as a tumor suppressor by targeting the Bcl-2 gene and that it promotes gastric adenocarcinoma cell apoptosis via Bcl-2. The findings of this study contribute to or current understanding of the functions of miR-449a in gastric adenocarcinoma.
Collapse
Affiliation(s)
- Bin Wei
- Department of Gastroenterology, Xi'an First Hospital, Xi'an, Shaanxi 710002, P.R. China
| | | | | | | |
Collapse
|
21
|
Xie B, Zhou J, Shu G, Liu DC, Zhou J, Chen J, Yuan L. Restoration of klotho gene expression induces apoptosis and autophagy in gastric cancer cells: tumor suppressive role of klotho in gastric cancer. Cancer Cell Int 2013; 13:18. [PMID: 23432957 PMCID: PMC3599807 DOI: 10.1186/1475-2867-13-18] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2013] [Accepted: 02/13/2013] [Indexed: 02/06/2023] Open
Abstract
Background The loss of tumor suppressor gene expression is involved in the carcinogenesis of gastric cancer (GC). Klotho is a recently identified tumor suppressor gene that epigenetically inactivated in gastric cancer. However, the signaling pathways involved in the suppressive role of klotho have rarely been reported in gastric cancer. In this study, we investigated the involvement of klotho in gastric cancer cell proliferation, apoptosis, and autophagy as well as the associated signaling. Methods Methylation of klotho gene promoter in GC-7901, MNK-45 and AGS gastric cancer cells as well as GES-1 normal gastric epithelial cells was detected by bisulfate-based PCR. Restoration of klotho gene expression was established by applying a demethylating agent and delivering aklotho gene expression vector into GC-7901 cells. Cell viability was measured by CCK-8 assay. Cell apoptosis and cycling were analyzed by flow cytometry. Autophagy was measured by detecting LC3-I and LC3-II expression. Protein levels and phosphorylation were measured by Western blot assay. Results Methylation of klotho gene promoter and expression of the klotho gene were detected in GC cells. Restoration of klotho gene expression significantly inhibited cell proliferation, induced cell apoptosis, and increased LC3-I/LC3-II expression in GC cells. Restoration of klotho gene expression downregulated the phosphorylation levels of IGF-1 receptor, IRS-1, PI3K, Akt, and mTOR proteins. Both apoptosis and autophagy inhibitors blocked klotho-induced apoptosis and autophagy. Conclusion Klotho is a tumor suppressor in gastric cancer, which regulates IGF-1R phosphorylation and the subsequent activation of IRS-1/PI3K/Akt/mTOR signaling, tumor cell proliferation, apoptosis, and autophagy.
Collapse
Affiliation(s)
- Biao Xie
- Departemt of Geriatric Surgery, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.
| | | | | | | | | | | | | |
Collapse
|
22
|
Matsuo T, Nishizuka SS, Ishida K, Endo F, Katagiri H, Kume K, Ikeda M, Koeda K, Wakabayashi G. Evaluation of chemosensitivity prediction using quantitative dose-response curve classification for highly advanced/relapsed gastric cancer. World J Surg Oncol 2013; 11:11. [PMID: 23339659 PMCID: PMC3562164 DOI: 10.1186/1477-7819-11-11] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Accepted: 01/06/2013] [Indexed: 11/10/2022] Open
Abstract
Background The use of standard chemotherapy regimens has changed the application of chemosensitivity tests from all chemotherapy-eligible patients to those who have failed standard chemotherapy, which includes patients with highly advanced, relapsed, or chemoresistant tumors. Methods We evaluated a total of 43 advanced primary and relapsed gastric cancers for chemosensitivity based on drug dose response curves to improve the objectivity and quality of quantitative measurements. The dose response curves were classified based on seven expected patterns. Instead of a binary chemosensitivity evaluation, we ranked drug sensitivity according to curve shapes and comparison with the peak plasma concentration (ppc) of each drug. Results A total of 193 dose response curves were obtained. The overall informative rate was 67.4%, and 85.3% for cases that had a sufficient number of cells. Paclitaxel (PXL)and docetaxel tended to show a higher rank, while cisplatin (CIS) and 5-fluorouracil (5-FU) tended to show resistance, particularly among the 20 cases (46.5%) that had recurrent disease after receiving chemotherapy with CIS and S-1 (5-FU). As such, we speculate that the resistant pattern of the chemosensitivity test suggests that cells with acquired drug resistance were selected by chemotherapy. Indeed, we observed a change in the chemosensitivity pattern of a sample before and after chemotherapy in terms of PXL sensitivity, which was used after primary chemotherapy. Conclusions These results suggest that: (i) the dose–response pattern provides objective information for predicting chemosensitivity; and (ii) chemotherapy may select resistant cancer cell populations as a result of the therapy.
Collapse
Affiliation(s)
- Teppei Matsuo
- Laboratory of Molecular Therapeutics Iwate Medical University School of Medicine, 19-1 Uchimaru, Morioka, Iwate, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Li K, Xia F, Zhang K, Mo A, Liu L. Association of a tgf-b1-509c/t polymorphism with gastric cancer risk: a meta-analysis. Ann Hum Genet 2012; 77:1-8. [PMID: 23088218 DOI: 10.1111/j.1469-1809.2012.00732.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 08/02/2012] [Indexed: 12/18/2022]
Abstract
Published data on the association between the transforming growth factor B1 (TGF-B1) gene 509C/T polymorphism and gastric cancer risk are inconclusive. To derive a more precise estimation of the relationship, a meta-analysis of the TGFB1-509C/T polymorphism (with 2130 cases and 2374 controls) from seven published case-control studies was performed. Crude odds ratios (ORs) with 95% confidence intervals (CIs) were used to assess the strength of association in the codominant model, the dominant model, and the recessive model. In the overall analysis, the T allele was significantly associated with susceptibility to gastric cancer in the recessive model (TT vs. CC+CT) (TT vs. CC+CT: OR = 1.35, 95% CI: 1.10-1.66, P = 0.10 for heterogeneity) when all the included studies were pooled into the meta-analysis. In the stratified analysis by country, the T allele was also found to be significantly associated with increased gastric cancer risk in the recessive model (TT vs. CC+CT) in Chinese studies and in T versus C in the Indian study. In conclusion, this meta-analysis supports the TGFB1-509T polymorphism as a susceptibility factor for gastric cancer.
Collapse
Affiliation(s)
- Kang Li
- Union Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | | | | | | | | |
Collapse
|