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Li Y, Guo J, Zhang H, Lam CW, Luo W, Zhou H, Zhang W. Protective Effect of Thymidine on DNA Damage Induced by Hydrogen Peroxide in Human Hepatocellular Cancer Cells. ACS OMEGA 2020; 5:21796-21804. [PMID: 32905386 PMCID: PMC7469367 DOI: 10.1021/acsomega.0c02843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 08/04/2020] [Indexed: 06/11/2023]
Abstract
Intracellular ribonucleotide (RN) and deoxyribonucleotide (dRN) pool sizes are critical for the fidelity of DNA synthesis. They are likely to be severely perturbed by many factors which disrupt the integrity and stability of DNA, leading to DNA damage. Exogenously supplied nucleosides are able to increase the deoxynucleoside triphosphate pools, then reverse the DNA damage, and decrease the oncogene-induced transformation dramatically. In this study, the impact of thymidine on the hydrogen peroxide (H2O2)-induced DNA damage was investigated in HepG2 liver cancer cells. From the result of the comet assay, the tail length of cells in the thymidine 600 μM + H2O2 1.0 mM group was dramatically decreased from 42.1 ± 10.8 to 21.9 ± 2.4 μm compared to that exposed with 1.0 mM H2O2 (p < 0.05), suggesting that pretreatment of thymidine reduced the DNA damage of HepG2 cells. Although the RN and dRN contents decreased in the damage group, most of them presented increasing tendency when pretreated with thymidine, especially the key metabolites dCTP, which was mainly related with the decline in the rate of DNA synthesis. The restoration also showed a significant G0/G1 phase arrest of cell cycle progression from 44.6 ± 2.2 to 56.6 ± 0.4% after pretreated with thymidine (p < 0.05). In conclusion, our data demonstrated that the pretreatment with thymidine had a potential protective ability against oxidative damage for DNA in HepG2 cells through the perturbation of RN and dRN pools as well as cell cycle arrest, which should provide new insights into the molecular basis of preventing H2O2-induced oxidative DNA damage in mammalian cells.
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Yu J, Wang R, Chen J, Wu J, Dang Z, Zhang Q, Li B. miR-340 Inhibits Proliferation and Induces Apoptosis in Gastric Cancer Cell Line SGC-7901, Possibly via the AKT Pathway. Med Sci Monit 2017; 23:71-77. [PMID: 28057912 PMCID: PMC5238948 DOI: 10.12659/msm.898449] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Gastric cancer is among the most common types of cancer, with high morbidity and mortality. MicroRNAs (miRNAs) play vital roles in the tumorigenesis and biology of gastric cancer. This study aimed to reveal the role of miR-340 in gastric cancer cell proliferation and apoptosis and to elucidate the potential mechanisms. MATERIAL AND METHODS Human gastric cancer cells SGC-7901 were used in this study for cell transfection with miR-340 mimic or inhibitor. After transfection, cell viability, proliferation, and apoptosis were examined by MTT, BrdU, and flow cytometry assays, respectively. The protein level changes of p27, p21, Caspase 3 (CASP3), B cell lymphoma 2 (BCL2), BCL2-associated X protein (BAX), and v-AKT murine thymoma viral oncogene (AKT) were detected by Western blot. RESULTS Overexpression of miR-340 significantly reduced cell viability and proliferation (P<0.01), and induced cell apoptosis (P<0.01) of SGC-7901. miR-340 elevated the protein level of cell cycle inhibitor p27, but did not affect the level of p21. Apoptosis-related factors pro-CASP3, cleaved-CASP3, and BAX were promoted, and BCL2 was inhibited by miR-340. miR-340 also suppressed the phosphorylation of AKT. Opposite effects were detected when SGC-7901 cells were transfected with miR-340 inhibitor. CONCLUSIONS These results indicate that miR-340 can inhibit proliferation and induce apoptosis of SGC-7901 cells, suggesting its roles in protecting against gastric cancer. The roles of miR-340 in gastric cancer cells may be associated with its regulation of the AKT pathway. Thus, miR-340 may be a potential therapeutic strategy for gastric cancer treatment.
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Affiliation(s)
- Jinzhong Yu
- Department of Gastroenterology, Henan Province Hospital of TCM, Zhengzhou, Henan, China (mainland)
| | - Ruijie Wang
- Second Clinical Medical College, Henan University of Chinese Medicine, Zhengzhou, Henan, China (mainland)
| | - Jianshe Chen
- Department of Reproductive Medicine, Henan Province Hospital of TCM, Zhengzhou, Henan, China (mainland)
| | - Jinfeng Wu
- Department of Gastroenterology, Shenzhen Luohu People's Hospital, Shenzhen, Guangdong, China (mainland)
| | - Zhongqin Dang
- Department of Gastroenterology, Henan Province Hospital of TCM, Zhengzhou, Henan, China (mainland)
| | - Qinsheng Zhang
- Department of Gastroenterology, Henan Province Hospital of TCM, Zhengzhou, Henan, China (mainland)
| | - Bo Li
- Department of Gastroenterology, Henan Province Hospital of TCM, Zhengzhou, Henan, China (mainland)
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Kang C, Lee Y, Lee JE. Recent advances in mass spectrometry-based proteomics of gastric cancer. World J Gastroenterol 2016; 22:8283-8293. [PMID: 27729735 PMCID: PMC5055859 DOI: 10.3748/wjg.v22.i37.8283] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 07/28/2016] [Accepted: 08/10/2016] [Indexed: 02/06/2023] Open
Abstract
The last decade has witnessed remarkable technological advances in mass spectrometry-based proteomics. The development of proteomics techniques has enabled the reliable analysis of complex proteomes, leading to the identification and quantification of thousands of proteins in gastric cancer cells, tissues, and sera. This quantitative information has been used to profile the anomalies in gastric cancer and provide insights into the pathogenic mechanism of the disease. In this review, we mainly focus on the advances in mass spectrometry and quantitative proteomics that were achieved in the last five years and how these up-and-coming technologies are employed to track biochemical changes in gastric cancer cells. We conclude by presenting a perspective on quantitative proteomics and its future applications in the clinic and translational gastric cancer research.
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Faria J, Barbosa J, Queirós O, Moreira R, Carvalho F, Dinis-Oliveira RJ. Comparative study of the neurotoxicological effects of tramadol and tapentadol in SH-SY5Y cells. Toxicology 2016; 359-360:1-10. [PMID: 27317026 DOI: 10.1016/j.tox.2016.06.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 06/12/2016] [Accepted: 06/14/2016] [Indexed: 10/21/2022]
Abstract
Opioid therapy and abuse are increasing, justifying the need to study their toxicity and underlying mechanisms. Given opioid pharmacodynamics at the central nervous system, the analysis of toxic effects in neuronal models gains particular relevance. The aim of this study was to compare the toxicological effects of acute exposure to tramadol and tapentadol in the undifferentiated human SH-SY5Y neuroblastoma cell line. Upon exposure to tramadol and tapentadol concentrations up to 600μM, cell toxicity was assessed through evaluation of oxidative stress, mitochondrial and metabolic alterations, as well as cell viability and death mechanisms through necrosis or apoptosis, and related signalling. Tapentadol was observed to trigger much more prominent toxic effects than tramadol, ultimately leading to energy deficit and cell death. Cell death was shown to predominantly occur through necrosis, with no alterations in membrane potential or in cytochrome c release. Both drugs were shown to stimulate glucose uptake and to cause ATP depletion, due to changes in the expression of energy metabolism enzymes. The toxicity mechanisms in such a neuronal model are relevant to understand adverse reactions to these opioids and to contribute to dose adjustment in order to avoid neurological damage.
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Affiliation(s)
- Juliana Faria
- IINFACTS-Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, Gandra, Portugal; UCIBIO-REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal; Department of Legal Medicine and Forensic Sciences, Faculty of Medicine, University of Porto, Porto, Portugal.
| | - Joana Barbosa
- IINFACTS-Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, Gandra, Portugal; UCIBIO-REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal; Department of Legal Medicine and Forensic Sciences, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Odília Queirós
- IINFACTS-Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, Gandra, Portugal; CBMA-Center for Molecular Biology and Environment, Department of Biology, University of Minho, Braga, Portugal
| | - Roxana Moreira
- IINFACTS-Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, Gandra, Portugal; CBMA-Center for Molecular Biology and Environment, Department of Biology, University of Minho, Braga, Portugal
| | - Félix Carvalho
- UCIBIO-REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Ricardo Jorge Dinis-Oliveira
- IINFACTS-Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, Gandra, Portugal; UCIBIO-REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal; Department of Legal Medicine and Forensic Sciences, Faculty of Medicine, University of Porto, Porto, Portugal.
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Bernardes FP, Batista AT, Porto ML, Vasquez EC, Campagnaro BP, Meyrelles SS. Protective effect of sildenafil on the genotoxicity and cytotoxicity in apolipoprotein E-deficient mice bone marrow cells. Lipids Health Dis 2016; 15:100. [PMID: 27229150 PMCID: PMC4882816 DOI: 10.1186/s12944-016-0268-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 05/20/2016] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND The pharmacological inhibitor of phosphodiesterase 5 (PDE5), sildenafil, is a promising candidate for antioxidant therapy that can result in cardiovascular protection. In addition to its known effects on the cardiovascular system, hypercholesterolemia leads to increased oxidative stress and DNA damage in the bone marrow, which is a non-classical target organ of atherosclerosis. In the present study, we evaluate oxidative stress and assess the effect of genomic instability on cell cycle kinetics in atherosclerotic animals and determine if sildenafil reverses these detrimental effects in bone marrow cells. METHODS Experiments were performed in male wild-type (WT) and apolipoprotein E knockout mice (apoE(-/-)) (9 weeks of age). apoE(-/-) mice were randomly distributed into the following 2 groups: sildenafil-treated (40 mg/kg/day for 3 weeks, n = 8) and vehicle-treated (n = 8), by oral gavage. After treatment, bone marrow cells were isolated to assess the production of superoxide anions and hydrogen peroxide, determine cell cycle kinetics and evaluate the presence of micronucleated cells. RESULTS Sildenafil treatment reduced the cytoplasmic levels of superoxide anion (~95% decrease, p < 0.05) and decreased hydrogen peroxide (~30% decrease, p < 0.05). Moreover, we observed protective effects on the DNA of bone marrow cells, including normal cell cycling, decreased DNA fragmentation and a diminished frequency of micronucleated cells. CONCLUSION Our data reveal that the excessive production of ROS in atherosclerotic mice overcome the DNA repair pathways in bone marrow cells. The novelty of the present study is that the administration of sildenafil reduced ROS to baseline levels and, consequently, reverted the DNA damage and its outcomes in bone marrow cells.
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Affiliation(s)
- Franciane P Bernardes
- Laboratory of Translational Physiology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, Brazil
| | - Alan T Batista
- Laboratory of Translational Physiology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, Brazil
| | - Marcella L Porto
- Federal Institute of Education, Science and Technology (IFES), Vila Velha, ES, Brazil
| | - Elisardo C Vasquez
- Laboratory of Translational Physiology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, Brazil
- Pharmaceutical Sciences Graduate Program, Vila Velha University (UVV), Vila Velha, ES, Brazil
| | - Bianca P Campagnaro
- Pharmaceutical Sciences Graduate Program, Vila Velha University (UVV), Vila Velha, ES, Brazil
| | - Silvana S Meyrelles
- Laboratory of Translational Physiology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, Brazil.
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Sun YQ, Xie JW, Chen PC, Zheng CH, Li P, Wang JB, Lin JX, Lu J, Chen QY, Cao LL, Lin M, Tu RH, Lin Y, Huang CM. Low Expression of CDK5 and p27 Are Associated with Poor Prognosis in Patients with Gastric Cancer. J Cancer 2016; 7:1049-56. [PMID: 27326247 PMCID: PMC4911871 DOI: 10.7150/jca.14778] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 03/15/2016] [Indexed: 12/18/2022] Open
Abstract
Several previous studies have demonstrated that CDK5 or p27 expression in gastric cancer are associated with overall survival. We have previously reported that tumor suppressive function of CDK5 is related to p27. The aim of this study was to investigate correlation between the clinicopathological parameters and overall survival with different CDK5/p27 expression statuses in 244 gastric cancer patients using immunohistochemistry. Low CDK5 expression was detected in 93 cases (38.11%) and low p27 in 157 cases (64.34%). The expression of CDK5 was significantly related to sex (P = 0.034) and Lauren's classification (P = 0.013). The expression of p27 was significantly related to sex (P = 0.012), differentiation (P = 0.003), TNM stage (P = 0.013) and lymph node metastasis (P = 0.001). Based on the combined expression of CDK5 and p27, we classified the patients into four subtypes: CDK5 Low/p27 Low (n = 69), CDK5 High/p27 Low (n = 88), CDK5 Low/p27 High (n = 24) and CDK5 High/p27 High (n = 63). The CDK5 Low/p27 Low expression was closely related to female (P = 0.026), diffuse type (P = 0.027) and lymph node metastasis (P = 0.010). The CDK5 Low/p27 Low patients displayed poorer survival in comparison with the rest of the patients in Kaplan-Meier analysis. No significant overall survival difference was observed among the patients with CDK5 High and/or p27 High expression. In the multivariate analysis, CDK5 and p27 co-expression status was identified as an independent prognostic factor for patients with gastric cancer.
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Affiliation(s)
- Yu-Qin Sun
- 1. Department of Gastric Surgery, Fujian Medical University Union Hospital, No.29 Xinquan Road, Fuzhou 350001, Fujian Province, People's Republic of China; College of Life Sciences, Fujian Normal University, Qishan Campus, Fuzhou 350108, Fujian Province, People's Republic of China
| | - Jian-Wei Xie
- 2. Department of Gastric Surgery, Fujian Medical University Union Hospital, No.29 Xinquan Road, Fuzhou 350001, Fujian Province, People's Republic of China
| | - Peng-Chen Chen
- 3. College of Life Sciences, Fujian Normal University, Qishan Campus, Fuzhou 350108, Fujian Province, People's Republic of China
| | - Chao-Hui Zheng
- 2. Department of Gastric Surgery, Fujian Medical University Union Hospital, No.29 Xinquan Road, Fuzhou 350001, Fujian Province, People's Republic of China
| | - Ping Li
- 2. Department of Gastric Surgery, Fujian Medical University Union Hospital, No.29 Xinquan Road, Fuzhou 350001, Fujian Province, People's Republic of China
| | - Jia-Bin Wang
- 2. Department of Gastric Surgery, Fujian Medical University Union Hospital, No.29 Xinquan Road, Fuzhou 350001, Fujian Province, People's Republic of China
| | - Jian-Xian Lin
- 2. Department of Gastric Surgery, Fujian Medical University Union Hospital, No.29 Xinquan Road, Fuzhou 350001, Fujian Province, People's Republic of China
| | - Jun Lu
- 2. Department of Gastric Surgery, Fujian Medical University Union Hospital, No.29 Xinquan Road, Fuzhou 350001, Fujian Province, People's Republic of China
| | - Qi-Yue Chen
- 2. Department of Gastric Surgery, Fujian Medical University Union Hospital, No.29 Xinquan Road, Fuzhou 350001, Fujian Province, People's Republic of China
| | - Long-Long Cao
- 2. Department of Gastric Surgery, Fujian Medical University Union Hospital, No.29 Xinquan Road, Fuzhou 350001, Fujian Province, People's Republic of China
| | - Mi Lin
- 2. Department of Gastric Surgery, Fujian Medical University Union Hospital, No.29 Xinquan Road, Fuzhou 350001, Fujian Province, People's Republic of China
| | - Ru-Hong Tu
- 2. Department of Gastric Surgery, Fujian Medical University Union Hospital, No.29 Xinquan Road, Fuzhou 350001, Fujian Province, People's Republic of China
| | - Yao Lin
- 3. College of Life Sciences, Fujian Normal University, Qishan Campus, Fuzhou 350108, Fujian Province, People's Republic of China
| | - Chang-Ming Huang
- 2. Department of Gastric Surgery, Fujian Medical University Union Hospital, No.29 Xinquan Road, Fuzhou 350001, Fujian Province, People's Republic of China
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Sha M, Ye J, Luan ZY, Guo T, Wang B, Huang JX. Celastrol induces cell cycle arrest by MicroRNA-21-mTOR-mediated inhibition p27 protein degradation in gastric cancer. Cancer Cell Int 2015; 15:101. [PMID: 26500453 PMCID: PMC4619578 DOI: 10.1186/s12935-015-0256-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 10/13/2015] [Indexed: 12/20/2022] Open
Abstract
Objective Celastrol has anti-cancer effects by increase of apoptosis of gastric cancer cells. However, its role in gastric cancer
cell cycle is still unclear. The aim of this study was to investigate the effect and mechanism of celastrol on gastric cancer cell cycle. Methods The effects of celastrol on cell cycle in BGC-823 and MGC-803 cells were assayed via flow cytometry analysis. The expression of p27 and mTOR was detected by real-time PCR and western blot. The activity of mTOR and mTORC2 was measured by mTOR and mTORC2 kinase assays. miR-21 mimic was used to up-regulate miR-21 expression and mTOR expression plasmid was used to increase mTOR level in gastric cancer cells. Results Celastrol caused G2/M cell-cycle arrest that was accompanied by the down-regulation of miR-21 expression. In particular, miR-21 overexpression reversed cell cycle arrest effects of celastrol. Further study showed that celastrol increased levels of the p27 protein by inhibiting its degradation. miR-21 and mTOR signaling pathway was involved in the increase of p27 protein expression in BGC-823 and MGC-803 cells treated with celastrol. Significantly, miR-21 overexpression restored the decrease of mTOR activity in cells exposed celastrol. Conclusions The effect of celastrol on cell cycle arrest of gastric cancer cells was due to an increase of p27 protein level via inhibiting miR-21-mTOR signaling pathway.
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Affiliation(s)
- Min Sha
- Institute of Clinical Medicine, Taizhou People's Hospital Affiliated of Nantong University of Medicine, Taizhou, 225300 China
| | - Jun Ye
- Institute of Clinical Medicine, Taizhou People's Hospital Affiliated of Nantong University of Medicine, Taizhou, 225300 China
| | - Zheng-Yun Luan
- Institute of Clinical Medicine, Taizhou People's Hospital Affiliated of Nantong University of Medicine, Taizhou, 225300 China
| | - Ting Guo
- Institute of Clinical Medicine, Taizhou People's Hospital Affiliated of Nantong University of Medicine, Taizhou, 225300 China
| | - Bian Wang
- Institute of Clinical Medicine, Taizhou People's Hospital Affiliated of Nantong University of Medicine, Taizhou, 225300 China
| | - Jun-Xing Huang
- Institute of Oncology, Taizhou People's Hospital Affiliated of Nantong University of Medicine, 210 Yingchun, Taizhou, 225300 Jiangsu China
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Zhuo W, Ge W, Meng G, Jia S, Zhou X, Liu J. MicroRNA‑20a promotes the proliferation and cell cycle of human osteosarcoma cells by suppressing early growth response 2 expression. Mol Med Rep 2015; 12:4989-94. [PMID: 26238942 PMCID: PMC4581803 DOI: 10.3892/mmr.2015.4098] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 06/25/2015] [Indexed: 01/20/2023] Open
Abstract
MicroRNAs (miRNAs) are crucial in cancer development. However, the underlying mechanisms of miRNAs in osteosarcoma (OS) remain largely uncharacterized. The present study investigated the role of miR‑20a in OS cell proliferation. It was determined that miR‑20a expression is markedly upregulated in OS tissues and cells compared with the matched adjacent normal tissues and h‑FOB human osteoblast cell lines. Ectopic expression of miR‑20a promoted the proliferation and anchorage‑independent growth of OS cells, whereas inhibition of miR‑20a reduced this effect. Bioinformatics analysis further revealed early growth response 2 (EGR2), as a potential target of miR‑20a. Data from luciferase reporter assays showed that miR‑20a directly binds to the 3'‑untranslated region (3'‑UTR) of EGR2 mRNA and represses expression at the transcriptional and translational levels. In functional assays, miR‑20a promoted OS cell proliferation and the cell cycle, which could be suppressed by an inhibitor of miR‑20a. In conclusion, the data provide compelling evidence that miR‑20a functions as an onco‑miRNA, which is important in promoting cell proliferation in OS, and its oncogenic effect is mediated primarily through direct suppression of EGR2 expression.
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Affiliation(s)
- Wenkun Zhuo
- Department of Orthopedics and Traumatology, Institute of Orthopedics and Traumatology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi 710000, P.R. China
| | - Weiming Ge
- Department of Orthopedics and Traumatology, The PLA Fifth Thirty Four Hospital, Luoyang, Henan 471000, P.R. China
| | - Guolin Meng
- Department of Orthopedics and Traumatology, Institute of Orthopedics and Traumatology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi 710000, P.R. China
| | - Shuaijun Jia
- Department of Orthopedics, Shanxi Hospital of Chinese Armed Police Forces, Xi'an, Shanxi 710000, P.R. China
| | - Xiang Zhou
- Department of Orthopedics and Traumatology, Institute of Orthopedics and Traumatology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi 710000, P.R. China
| | - Jian Liu
- Department of Orthopedics and Traumatology, Institute of Orthopedics and Traumatology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi 710000, P.R. China
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Zhang T, Cao HL, Luo SJ, Zheng DL, Chen YN. Construction of a gastric cancer cell line with stably silenced expression of CD14. Shijie Huaren Xiaohua Zazhi 2014; 22:3194-3200. [DOI: 10.11569/wcjd.v22.i22.3194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To develop a SGC-7901 cell line with stably silenced expression of CD14 to provide an experimental basis for the study of the pathogenesis of gastric cancer.
METHODS: A CD14-shRNA lentiviral vector was constructed to transfect gastric cancer SGC-7901 cells. RT-PCR and Western blot were used to detect the CD14 mRNA and protein levels in untreated SGC-7901 cells (blank control group), SGC-7901 cells transfected with NC-CD14 shRNA (NC-CD14 shRNA control group) and SGC-7901 cells transfected with the CD14-shRNA lentiviral vector (CD14-shRNA lentiviral vector group).
RESULTS: CD14-shRNA expression vector was successfully constructed and transfected into gastric cancer cells. RT-PCR showed that the Ct value for the CD14-shRNA lentiviral vector group was significantly higher than those for the NC-CD14 shRNA control group and blank control group (P = 0.000; P < 0.001), and the 2Ct value for the CD14-shRNA lentiviral vector group (1±0.08) was significantly lower than those for the NC-CD14 shRNA control group and blank control group (P = 0.0001; P < 0.001). Western blot analysis showed that the relative expression of CD14 protein in the CD14-shRNA lentiviral vector group (0.01) was significantly less than that in the blank control group (1.0) and NC-CD14 shRNA control group (0.83).
CONCLUSION: A CD14-shRNA lentiviral vector has been successfully transfected into gastric cancer SGC-7901 cells, which can inhibit the expression of CD14 mRNA and protein in SGC-7901 cells.
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