scholarly journals Up-regulation of Rb by small activating RNA inhibits cell invasion and migration in gastric cancer cells

2020 ◽  
Author(s):  
Lipan Peng ◽  
Shujie Zeng ◽  
Shuai Kong ◽  
Shubo Tian ◽  
Tao Xu ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Gene Promoter ◽  
Negative Control ◽  
Migration And Invasion ◽  
Gastric Cancer Cells ◽  
Invasion And Migration ◽  
Significant Difference ◽  
Rna Activation ◽  
Mock Transfection ◽  
And Migration

Abstract Gastric cancer (GC) is a lethal disease that needs further investigation. Recent studies have reported that small activating RNA (saRNA), involved in a process called RNA activation, plays an important role in the development of cancer. We designed three different saRNAs targeting the retinoblastoma (Rb) gene promoter in GC cell lines. Upregulated Rb expression after transfection of the saRNAs was confirmed by PCR and western blotting and resulted in inhibition of GC cell proliferation, migration, and invasion compared with the control groups. There was no significant difference between the negative control saRNA and mock transfection groups. Overall, Rb is a promising novel prognostic biomarker of GC and, due to its role in metastasis, a novel therapeutic target for the clinical management of invasive and metastatic GC.

scholarly journals Up-regulation of Rb by small activating RNA inhibits cell invasion and migration in gastric cancer cells

2020 ◽  
Author(s):  
Lipan Peng ◽  
Shujie Zeng ◽  
Shuai Kong ◽  
Shubo Tian ◽  
Tao Xu ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Cell Lines ◽  
Gene Promoter ◽  
Cell Types ◽  
Negative Control ◽  
Migration And Invasion ◽  
Gastric Cancer Cells ◽  
Invasion And Migration ◽  
Significant Difference ◽  
Rna Activation

Abstract Background: Gastric cancer (GC) is a lethal disease that needs further investigation. Recent studies have reported that small activating RNA (saRNA), involved in a process called RNA activation, plays an important role in the development of cancer. Methods: The expression of retinoblastoma (Rb) was detected in human GC tissues and cell lines. We designed three different saRNAs targeting the Rb gene promoter in GC cell lines. Upregulated Rb expression after transfection of the saRNAs was confirmed by PCR and western blotting. And GC cell proliferation, migration, and invasion were detected using CCK8 assays and Transwell assays. Results: Here, we found that Rb displayed lower expression in GC tissues and cells. saRNA-3 significantly increased the expression of Rb in both SGC-7901 and MKN-28 cells. saRNA-3 significantly inhibited the proliferation of both cell types by day 3 after transfection. There was no significant difference between the negative control saRNA and mock transfection groups. saRNA-3 decreased the tumor volume and weight compared with the mock and dsControl groups. In addition, saRNA-3 transfection decreased the migratory ability of SGC-701 and MKN-28 cells.Conclusions: Overall, Rb is a promising novel prognostic biomarker of GC and, due to its role in metastasis, a novel therapeutic target for the clinical management of invasive and metastatic GC.

MiR-21 Promotes the Invasion and Metastasis of Gastric Cancer Cells by Activating Epithelial-Mesenchymal Transition

2019 ◽  
Vol 60 (5-6) ◽  
pp. 208-218 ◽  
Author(s):  
Tao Xiao ◽  
Zhigang Jie
Keyword(s):  
Gastric Cancer ◽  
Epithelial Mesenchymal Transition ◽  
Malignant Tumors ◽  
Migration And Invasion ◽  
Epithelial Cell Line ◽  
Invasion And Metastasis ◽  
Gastric Cancer Cells ◽  
Mesenchymal Transition ◽  
Invasion And Migration ◽  
And Migration

Background: Gastric cancer (GC) is one of the most common malignant tumors. It is likely to occur in lymph nodes and is prone to distant metastasis in its early stages, which portends a poor prognosis. Previous studies have shown that miRNA-21 was abnormally highly expressed and associated with early metastasis in GC, but the mechanism by which it regulates the invasion and metastasis of GC has not been elucidated. Methods: Epithelial-mesenchymal transition (EMT) is an important pathologic basis of tumor invasion and metastasis, and in this study, the relationship between miRNA-21 and EMT in GC invasion and metastasis was investigated using RT-qPCR, Western blot, and wound scratch and transwell assays. Results: We found that miRNA-21 expression in GC cell lines was higher than in a gastric mucosal epithelial cell line. After transfection with an miRNA-21 mimic, the upregulation of EMT was found to promote migration and invasion of MGC-803 cells. However, the downregulation of EMT was found to accompany the inhibition of invasion and migration of GC cells after downregulation of miRNA-21 expression due to the transfection of an miRNA-21 inhibitor. Conclusions: These findings suggest that miRNA-21 might promote the invasion and metastasis of GC by upregulating EMT.

scholarly journals 28-Hydroxy-3-oxoolean-12-en-29-oic Acid, a Triterpene Acid from Celastrus Orbiculatus Extract, Inhibits the Migration and Invasion of Human Gastric Cancer Cells In Vitro

Molecules ◽  
2019 ◽  
Vol 24 (19) ◽  
pp. 3513 ◽  
Author(s):  
Zewen Chu ◽  
Haibo Wang ◽  
Tengyang Ni ◽  
Li Tao ◽  
Liangliang Xiang ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Cancer Cells ◽  
Cell Invasion ◽  
Migration And Invasion ◽  
Dependent Manner ◽  
Celastrus Orbiculatus ◽  
Gastric Cancer Cells ◽  
Invasion And Migration ◽  
And Migration ◽  
Related Proteins

Gastric cancer is the fifth most common tumor and has the third-highest mortality rate among various malignant tumors, and the survival rate of patients is low. Celastrus orbiculatus extract has been shown to inhibit the activity of a variety of tumors. This study explored the inhibitory effect of the oleanane-type triterpenoid acid 28-hydroxy-3-oxoolean-12-en-29-oic acid molecule from Celastrus orbiculatus extract on gastric cancer cell invasion and metastasis and determined its mechanism. 28-Hydroxy-3-oxoolean-12-en-29-oic acid was first diluted to various concentrations and then used to treat SGC-7901 and BGC-823 cells. Cell proliferation was assessed by an MTT (thiazole blue) assay. Transwell and wound healing assays were used to assess cell invasion and migration. High-content imaging technology was used to further observe the effects of the drug on cell invasion and migration. Western blotting was used to assess the effects on the expression of matrix metalloproteinases (MMPs) and the effects on epithelial–mesenchymal transition (EMT)-related proteins and phosphorylation-related proteins. We found that 28-Hydroxy-3-oxoolean-12-en-29-oic acid inhibited the migration and invasion of SGC-7901 and BGC-823 gastric cancer cells in a dose-dependent manner. Consequently, 28-hydroxy-3-oxoolean-12-en-29-oic acid decreased the expression of EMT-related proteins and MMPs in gastric cancer cells and reduced protein phosphorylation, inhibiting the migration and invasion of gastric cancer cells.

scholarly journals ANXA2 Silencing Inhibits Proliferation, Invasion, and Migration in Gastric Cancer Cells

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Rui Xie ◽  
Jia Liu ◽  
Xuefeng Yu ◽  
Chunfeng Li ◽  
Yufeng Wang ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Cancer Cells ◽  
Cell Lines ◽  
Biological Behavior ◽  
Migration And Invasion ◽  
Gastric Cancer Cells ◽  
Ags Cells ◽  
Invasion And Migration ◽  
Ags Cell Line ◽  
And Migration

Annexin A2 (ANXA2) has been well known to associate with the progress of malignant tumor. However, the biological behavior of ANXA2 in gastric cancer (GC) remains unclear. We made a hypothesis in transcriptome level from TCGA datasets. Then, we used immunohistochemical staining to quantify the expression level of ANXA2 protein in GC tissues compared with adjacent tissues. Quantitative real-time PCR and western blot were used for analyzing ANXA2 expression in human GC (SGC-7901, MKN-45, BGC-823, and AGS) cell lines. We investigated the effect of a lentivirus-mediated knock-down of ANXA2 on the proliferation, invasion and migration of gastric cancer AGS cells. Cell proliferation was examined by MTT and colony formation tests. Cell apoptosis and cycle were measured by flow cytometry. Migration and invasion were detected by transwell assay. We found that high expression of ANXA2 can increase the mobility of cancer cells from TCGA datasets. ANXA2 was upregulated in GC tissues compared with adjacent tissues. AGS cell line displayed significantly higher expression of ANXA2 among the four GC cell lines. In addition, ANXA2 silencing led to a weakened ability of proliferation, invasion, and migration in GC cells; targeting of ANXA2 may be a potential therapeutic strategy for GC patients.

scholarly journals miR-182-5p improves the viability, mitosis, migration, and invasion ability of human gastric cancer cells by down-regulating RAB27A

2017 ◽  
Vol 37 (3) ◽  
Author(s):  
Yuling Li ◽  
Shudong Chen ◽  
Zhengfei Shan ◽  
Liyan Bi ◽  
Shengqiang Yu ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Cell Lines ◽  
Luciferase Reporter ◽  
Migration And Invasion ◽  
Human Gastric Cancer ◽  
Gastric Cancer Cells ◽  
Migration Ability ◽  
Invasion And Migration ◽  
Gene Assay ◽  
And Migration

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.

scholarly journals Compound Wumei Powder Inhibits the Invasion and Metastasis of Gastric Cancer via Cox-2/PGE2-PI3K/AKT/GSK3β/β-Catenin Signaling Pathway

2017 ◽  
Vol 2017 ◽  
pp. 1-16 ◽  
Author(s):  
Nai-Xia Ma ◽  
Wei Sun ◽  
Jian Wu ◽  
Shen-Lin Liu ◽  
Lei Weng ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Western Blot ◽  
Signaling Pathway ◽  
Migration And Invasion ◽  
Invasion And Metastasis ◽  
Gastric Cancer Cells ◽  
Western Blot Assay ◽  
Invasion And Migration ◽  
Cox 2 ◽  
And Migration

To explore the role of CWP in invasion and migration of gastric cancer cells and its underlying molecular mechanism, we performed the experiment in SGC-7901 cells both in vitro and in vivo. In the cell experiment, we evaluated cell proliferation by MTT assay. The results showed that CWP can inhibit the growth of SGC-7901 cells. The influence on cell migration and invasion was detected by wound-healing and Transwell invasion assays. The results showed that the abilities of invasion and migration are restrained in CWP group. Western blot showed that CWP can decrease the expression of Cox-2 and inhibit the PI3K/AKT/GSK3β/β-catenin signaling pathway. In the animal experiment, we observed that CWP had an inhibitory effect on the growth of xenograft tumors of nude mice. IHC assay, ELISA, RT-PCR assay, and Western blot assay were used to test relevant cytokines of Cox-2/PGE2-PI3K/AKT/GSK3β/β-catenin pathway. The results showed that CWP can suppress relevant cytokines of Cox-2/PGE2-PI3K/AKT/GSK3β/β-catenin pathway. In conclusion, we suggest that CWP inhibits the invasion and metastasis of SGC-7901 cells via Cox-2/PGE2-PI3K/AKT/GSK3β/β-catenin signaling pathway.

Effects and Mechanisms of Anlotinib and Dihydroartemisinin Combination Therapy in Ameliorating Malignant Biological Behavior of Gastric Cancer Cells

2020 ◽  
Vol 21 ◽  
Author(s):  
Qiong Luo ◽  
Suyun Zhang ◽  
Donghuan Zhang ◽  
Rui Feng ◽  
Nan Li ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Cancer Cells ◽  
Molecular Mechanisms ◽  
Chorioallantoic Membrane ◽  
Cell Counting ◽  
Biological Behavior ◽  
Gastric Cancer Cells ◽  
Invasion And Migration ◽  
Apoptosis Related Protein ◽  
And Migration

Background: Gastric cancer(GC) is currently one of the major malignancies that threatens human lives and health. Anlotinib is a novel small-molecule that inhibits angiogenesis to exert anti-tumor effects. However, the function in gastric cancer is incompletely understood. Objective: The aim of the present study was to investigate the anti-tumor effects and molecular mechanisms of anlotinib combined with dihydroartemisinin (DHA) in SGC7901 gastric cancer cells. Method: Different concentrations of anlotinib and DHA were used to treat SGC7901 gastric cancer cells, after which cell proliferation was measured. Drug interactions of anlotinib and DHA were analyzed by the Chou-Talalay method with CompuSyn software. proliferation, apoptosis, invasion, migration, and angiogenesis were measured using the cell counting kit-8 (CCK8) assay, flow cytometry, Transwell invasion assays, scratch assays, and chicken chorioallantoic membrane (CAM) assays. proliferation-associated protein (Ki67), apoptosis-related protein (Bcl-2), and vascular endothelial growth factor A (VEGF-A) were quantified by Western bloting. Results: The combination of 2.5 μmol/L of anlotinib and 5 of μmol/L DHA was highly synergistic in inhibiting cell growth, significantly increased the apoptosis rate and suppressed obviously the invasion and migration capability and angiogenesis of gastric cancer cells. In addition, the expression levels of Ki67, Bcl-2, and VEGF-A, as well as angiogenesis, were significantly decreased in the Combination of drugs compared with in control and either drug alone. Conclusion: The combination of anlotinib and DHA showed synergistic antitumor activity, suggesting their potential in treating patients with gastric cancer.

LncRNA PCAT18/miR-301a/TP53INP1 axis is involved in gastric cancer cell viability, migration and invasion

2020 ◽  
Vol 168 (5) ◽  
pp. 547-555
Author(s):  
Jin Dou ◽  
Daoyuan Tu ◽  
Haijian Zhao ◽  
Xiaoyu Zhang
Keyword(s):  
Gastric Cancer ◽  
Cell Proliferation ◽  
Cell Viability ◽  
Cell Lines ◽  
Underlying Mechanism ◽  
Migration And Invasion ◽  
Invasion And Migration ◽  
Proliferation And Metastasis ◽  
And Migration ◽  
Cell Proliferation And Metastasis

Abstract MiR-301a is as an oncogene involved in the regulation of gastric cancer (GC) progression, but the underlying mechanism is unclear. This study was to explore the lncRNA PCAT18/miR-301a/TP53INP1 axis in regulating the GC cell proliferation and metastasis. In the present study, GC tissues and cell lines were collected for the detection of PCAT18 expression. Herein, we found that PCAT18 is significantly decreases in human GC tissues and five GC cell lines. Overexpression of PCAT18 inhibits cell viability, invasion and migration of GC cells and tumour growth of GC xenograft tumours. PCAT18 negatively regulates the expression level of miR-301a. The interaction between PCAT18 and miR-301a is confirmed by RIP and RNA pull down. MiR-301a mimic increases cell viability and promotes cell migration and invasion and reverses the inhibitory action of PCAT18. TP53INP1 expression is negatively regulated by miR-301a and TP53INP1/miR-301a is involved in GC viability, migration and invasion. The promoting of PCAT18 on TP53INP1 expression is abolished by miR-301a overexpression. In conclusion, lncRNA PCAT18 acts as a tumour suppressor for GC and lncRNA PCAT18, miR-301a and TP53INP1 comprise a signal axis in regulating GC cell proliferation, migration and invasion.

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