Project description:Capsaicin has previously been demonstrated to exhibit anti-tumor effect in various cancer type. However, the deep biological function and molecular mechanism of capsaicin was still uncertain. In this research, we used high-throughput RNA sequencing to unveil the potential biological function of capsaicin in human gastric cancer cell line AGS.Total RNA was collected from AGS cells treated with capsaicin (at a dose of 250uM for 24h) or DMSO using TRIzol reagent according to the manufacturer’s protocol (n=3 per group). RNA was quantified using a NanoDrop ND-2000 (Thermo Scientific, USA), and RNA integrity was assessed using an Agilent Bioanalyzer 2100 (Agilent Technologies, USA). High throughput sequencing was performed by TsingKe biotech Co., Ltd. according to the manufacturers` standard protocols. The quality control and preliminary analysis of sequencing raw data was performed by Novogene biotech Co., Ltd. according to the standard pipeline. Gene expression level was measured by Fragments Per Kilobase of exon model per Million mapped fragments (FPKM).
Project description:Gastric cancer is one of the world common causes of cancer death. Many people have suffered, but yet therapeutic methods found. May studies have showedthat Tanshinone IIA, a diterpenequinone, which extracted from the traditional herbal medicine Danshen (Salvia miltiorrhiza),has potential against many kind of cancer types. Our previous studies have demonstrated TIIA can kill gastric cancer AGS cells, but the response signalling is still unclear. Therefore, we used the time-dependent phosphoproteomic approach to reveal the regulatory effects of TIIA in AGS cells. Our results showed that a total of 1092 phosphoprotiens and 3332 phosphopeptides were identified in 3615 phosphorylation sites and 349 phosphosites corresponding to 220 phosphorylated proteins were significantly regulated. Furthermore, by using networkand functionalenrichmentanalyses, we found that TIIA regulated several cellular processesingastric cancer cells, such astranscription mRNA processing, DNA damage and protein unfolding response. Finally, we further validated that TIIA caused protein unfolding response and DNA damage via inducing ROS production. These findings not only uncover the molecular mechanisms mediated by TIIA but also contribute to the development of gastric cancer therapy.
Project description:Gastric cancer is one of the most common cancers worldwide. Epstein-Barr virus-associated gastric cancer accounts for approximately 10% of all gastric cancers. EBV expresses its own proteins and miRNAs (BART miRNAs) and regulates host gene expression. In this study, we examined the effect of EBV infection on host mRNA expression. Differential gene expression was analyzed between EBV-negative human gastric cancer cell line AGS and EBV-positive human gastric cancer cell line AGS-EBV.
Project description:Doxycycline, a tetracycline based antibiotic which has bacteriostatic activity against a broad range of both gram positive and gram negative bacteria was identified to inhibit the expression of ERK/MAPK signaling pathway in gastric cancer. ERK/MAPK pathway is one of the highly activated and a crucial player in gastric cancer progression. To delineate the complex transcription program associated with ERK/MAPK pathway and thus inhibited by doxycycline in gastric cancer cells, doxycycline was treated in AGS, one of the ERK/MAPK overexpressed gastric cancer cell line. The resulatant changes in genome-wide mRNA expression pattern between control and doxycycline treated was profiled using Human Transcriptome 2.0 arrays.
Project description:Beta-catenin (CTNNB1) is a major component of Wnt signaling pathway and a crucial player in gastric cancer. To delineate the complex transcription program governed by CTNNB1 in gastric cancer cells, CTNNB1 was silenced in AGS, a commonly used Wnt signaling activated gastric cancer cell line and the resultant changes in genome-wide mRNA expression pattern was profiled using Affymetrix Human Gene 1.0 ST Array.
Project description:Ornithogalum is one of the therapeutic formulation used in homeopathic treatments. It is specifically used in the treatment for gastric and duodenal ulcerations. Towards understanding the anticancer mechanism, we investigated the genome-wide mRNA changes upon treating AGS Gastric Cancer cells with Ornithogalum. We observed that totally 707 genes were significantly regulated upon Ornithogalum Treatment, among them 246 genes were upregulated and 461 genes were downregulated. The results provide insight into molecular implication and gene level expression of AGS upon treatment with Ornithogalum. Total RNA was isolated from AGS gastric cancer cells treated with 0.01% of ornithogalum and ethanol control and profiled using Affymetrix Human Gene 1.0 ST Array (HuGene-1_0-st).
Project description:Ornithogalum is one of the therapeutic formulation used in homeopathic treatments. It is specifically used in the treatment for gastric and duodenal ulcerations. Towards understanding the anticancer mechanism, we investigated the genome-wide mRNA changes upon treating AGS Gastric Cancer cells with Ornithogalum. We observed that totally 707 genes were significantly regulated upon Ornithogalum Treatment, among them 246 genes were upregulated and 461 genes were downregulated. The results provide insight into molecular implication and gene level expression of AGS upon treatment with Ornithogalum.
Project description:Genome-wide mRNA expression profiling was performed in AGS, gastric cancer cell line, upon miR-25 silencing. At 48 hours upon anti-miR-25-3p (miRNA inhibitor) and non-targeting control RNA transfection, the whole transcriptome profiling was performed in triplicates. The miR-25 silencing elevates the diffuse gastric cancer features like expression of COL1A2, expression of COL1A2 co-expressed genes, Epithelial to Mesenchymal Transition (EMT) and angiogenesis associated genes.