RNA Sequencing Reveals the Snail-Regulated Transcriptome in Head-and-Neck Squamous Cell Carcinoma.
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE65131 | GEO | 2017/01/04
SECONDARY ACCESSION(S): PRJNA273188
REPOSITORIES: GEO
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Project description:Epithelial-mesenchymal transition (EMT) is in the highlights as a significant role in tumor progression and invasion. Snail was known as the one of regulators of EMT in various malignant tumors. The aim of this study was to investigate the effect of Snail on invasiveness/migratory ability of gastric cancer cell lines and clinicopathological and prognostic significance of Snail over-expression using immunohistochemistry in tissue microarray of 314 gastric adenocarcinomas (GC). Differential gene expression in Snail over-expressed GC was investigated using cDNA microarray analysis. Silencing of Snail by ShRNA induced decreased of invasion, migration of gastric cancer cell lines. In contrast, over-expression of Snail induced increased invasiveness and migratory ability of gastric cancer cell lines in accordance increase of VEGF and MMP11. Furthermore, the over-expression of Snail (?75% nuclear staining of Snail) was significantly associated with tumor progression (p<0.0001), lymph node metastases (p=0.002), lymphovascular invasion (p=0.002), and perineural invasion (p=0.002) in 314 GC patient. Snail over-expression was also associated with poor prognosis (shorter survival) in GC patients (p=0.023). cDNA microarray revealed 213 differential expressed genes in Snail over-expressed GC tissues, including genes related to metastasis, invasion. Based on above results, it was suggested that Snail plays a significant role in invasiveness/migratory ability of GCs. In addition, Snail might be used to predictive biomarker for evaluation of prognosis or aggressiveness in GCs. 48 primary gastric adenocarcinoma fresh frozen tissues were used for microarray. All the tissues were obtained after curative resection after pathologic confirm at Pusan National University Hospital (PNUH, Busan, Korea) and Cheonnam University Hospital (CNUH, Cheonnam, Korea). Microarray experiment and data analysis were done at Cancer research institute, PNUH, Busan, Korea.
2012-05-17 | E-GEOD-38024 | biostudies-arrayexpress
Project description:Epithelial-mesenchymal transition (EMT) is in the highlights as a significant role in tumor progression and invasion. Snail was known as the one of regulators of EMT in various malignant tumors. The aim of this study was to investigate the effect of Snail on invasiveness/migratory ability of gastric cancer cell lines and clinicopathological and prognostic significance of Snail over-expression using immunohistochemistry in tissue microarray of 314 gastric adenocarcinomas (GC). Differential gene expression in Snail over-expressed GC was investigated using cDNA microarray analysis. Silencing of Snail by ShRNA induced decreased of invasion, migration of gastric cancer cell lines. In contrast, over-expression of Snail induced increased invasiveness and migratory ability of gastric cancer cell lines in accordance increase of VEGF and MMP11. Furthermore, the over-expression of Snail (≥75% nuclear staining of Snail) was significantly associated with tumor progression (p<0.0001), lymph node metastases (p=0.002), lymphovascular invasion (p=0.002), and perineural invasion (p=0.002) in 314 GC patient. Snail over-expression was also associated with poor prognosis (shorter survival) in GC patients (p=0.023). cDNA microarray revealed 213 differential expressed genes in Snail over-expressed GC tissues, including genes related to metastasis, invasion. Based on above results, it was suggested that Snail plays a significant role in invasiveness/migratory ability of GCs. In addition, Snail might be used to predictive biomarker for evaluation of prognosis or aggressiveness in GCs.
2012-05-18 | GSE38024 | GEO
Project description:Dynamic regulation of glucose flux between aerobic glycolysis and the pentose phosphate pathway (PPP) during epithelial-mesenchymal transition (EMT) is not well-understood. Here we show that Snail (SNAI1), a key transcriptional repressor of EMT, regulates glucose flux toward PPP, allowing cancer cell survival under metabolic stress. Mechanistically, Snail regulates glycolytic activity via repression of PFKP (phosphofructokinase, platelet), a major isoform of cancer-specific phosphofructokinase-1 (PFK-1), an enzyme involving the first rate-limiting step of glycolysis. The suppression of PFKP switches the glucose flux towards PPP, generating NADPH with increased metabolites of oxidative PPP. Functionally, dynamic regulation of PFKP significantly potentiates cancer cell survival under metabolic stress and increases metastatic capacities in vivo. Further, knockdown of PFKP rescues metabolic reprogramming and cell death induced by loss of Snail. Thus, the Snail-PFKP axis plays an important role in cancer cell survival via regulation of glucose flux between glycolysis and PPP.Dynamic regulation of glucose flux between aerobic glycolysis and the pentose phosphate pathway (PPP) during epithelial-mesenchymal transition (EMT) is not well-understood. Here we show that Snail (SNAI1), a key transcriptional repressor of EMT, regulates glucose flux toward PPP, allowing cancer cell survival under metabolic stress. Mechanistically, Snail regulates glycolytic activity via repression of PFKP (phosphofructokinase, platelet), a major isoform of cancer-specific phosphofructokinase-1 (PFK-1), an enzyme involving the first rate-limiting step of glycolysis. The suppression of PFKP switches the glucose flux towards PPP, generating NADPH with increased metabolites of oxidative PPP. Functionally, dynamic regulation of PFKP significantly potentiates cancer cell survival under metabolic stress and increases metastatic capacities in vivo. Further, knockdown of PFKP rescues metabolic reprogramming and cell death induced by loss of Snail. Thus, the Snail-PFKP axis plays an important role in cancer cell survival via regulation of glucose flux between glycolysis and PPP.
2017-11-07 | MTBLS387 | MetaboLights
Project description:Analysis of mouse ovarian cancer cell line HM-1 transfected with shRNA targeting Snail, an EMT inducer. Anti-tumor immuty in state of EMT remains unclear. We focused on Snail, a major EMT inducer, and explored the influence of Snail on immune ivasion into ovarian tumors by generating Snail knockdown cell line. Elucidating the mechanisms of Snail-induced immune evasion will lead to the development of novel treatment strategies for tumor undergoing EMT.
2018-01-27 | GSE109688 | GEO
Project description:Transcriptional profiling of mouse 4T1 breast cancer cells stably tranduced with pLEX-MCS based lentivirus. Three groups were compared, Vector cells, SNAIL expressing cells; and SNAIL+FBXO11 expressing cells. SNAIL expression induced strong EMT phenotype while SNAIL/FBXO11 reversed cells back to epithelial cells.
2014-12-01 | GSE50887 | GEO
Project description:To screen the genes regulated by wt-Snail and non-acetylated Snail The successful development of cancer metastasis requires two major events: the reprogramming of cancer cells to increase their migration and tumor-initiation capabilities; and the remodeling of the tumor microenvironment to facilitate invasion and colonization of cancer cells. Epithelial-mesenchymal transition (EMT) is a crucial mechanism for reprogramming cancer cells to possess tumor initiation and migration capabilities1,2. However, the role of EMT in the interplay between tumor and host cells is largely unknown. The EMT regulator Snail is mainly known as a transcriptional repressor of the adhesion protein E-cadherin, whose repression is considered to be a key step in initiating metastasis3,4. We previously found that Snail can also act as an activator that induces the transcription of ERCC15 and IL86. Here we show that Snail is acetylated by CREB-binding protein (CBP) and that Snail and CBP co-occupy the promoters of target genes to activate transcription of the target genes. Furthermore, Snail activates the expression of a panel of cytokine genes, including TNFa (which forms a positive feedback loop with Snail to amplify the signal) and CCL2 and CCL5 (which facilitate the recruitment of macrophages by cancer cells). Our results demonstrate a novel function for Snail, providing new understanding of the recruitment of host cells to tumor sites during metastatic evolution. Establish stable transfectants of pCDH-Snail and pCDH-Snail2R in FaDu cells and analyze the mRNA expression level of by cDNA microarray. FaDu transfected with pCDH vector was used as a control experiment.
2014-08-16 | E-GEOD-58592 | biostudies-arrayexpress
Project description:To screen the genes regulated by wt-Snail and non-acetylated Snail The successful development of cancer metastasis requires two major events: the reprogramming of cancer cells to increase their migration and tumor-initiation capabilities; and the remodeling of the tumor microenvironment to facilitate invasion and colonization of cancer cells. Epithelial-mesenchymal transition (EMT) is a crucial mechanism for reprogramming cancer cells to possess tumor initiation and migration capabilities1,2. However, the role of EMT in the interplay between tumor and host cells is largely unknown. The EMT regulator Snail is mainly known as a transcriptional repressor of the adhesion protein E-cadherin, whose repression is considered to be a key step in initiating metastasis3,4. We previously found that Snail can also act as an activator that induces the transcription of ERCC15 and IL86. Here we show that Snail is acetylated by CREB-binding protein (CBP) and that Snail and CBP co-occupy the promoters of target genes to activate transcription of the target genes. Furthermore, Snail activates the expression of a panel of cytokine genes, including TNFa (which forms a positive feedback loop with Snail to amplify the signal) and CCL2 and CCL5 (which facilitate the recruitment of macrophages by cancer cells). Our results demonstrate a novel function for Snail, providing new understanding of the recruitment of host cells to tumor sites during metastatic evolution.
2014-08-16 | GSE58592 | GEO
Project description:Transcriptional profiling of mouse HMLEN breast cancer cells (HMLE cells transformed with -Neu oncogene) stably tranduced with pLEX-MCS based lentivirus. Three groups were compared, Vector cells, SNAIL expressing cells; and SNAIL+FBXO11 expressing cells. SNAIL expression induced strong EMT phenotype while SNAIL/FBXO11 reversed cells back to epithelial cells.
2014-12-01 | GSE50888 | GEO
Project description:SNAIL is a key transcriptional regulator in embryonic development and cancer. Its effects in physiology and disease are believed to be linked to its role as a master regulator of epithelial-to-mesenchymal transition (EMT). Here, we report EMT-independent oncogenic SNAIL functions in cancer. Using genetic models, we systematically interrogated SNAIL effects in various oncogenic backgrounds and tissue types. SNAIL related phenotypes displayed remarkable tissue- and genetic context-dependencies, ranging from protective effects as observed in KRAS- or WNT-driven intestinal cancers, to dramatic acceleration of tumorigenesis, as shown in KRAS-induced pancreatic cancer. Unexpectedly, SNAIL-driven oncogenesis was not associated with E-cadherin downregulation or induction of an overt EMT program. Instead, we show that SNAIL induces bypass of senescence and cell cycle progression through p16INK4A-independent inactivation of the Retinoblastoma (RB)-restriction checkpoint. Collectively, our work identifies novel non-canonical EMT-independent functions of SNAIL and unravel its complex context-dependent role in cancer.
2022-12-13 | PXD038726 | Pride
Project description:Snail and Twist are two EMT inducer, expression of Snail or Twist will induce EMT in HMLE and MCF10A cells. By introducing Snail or Twist in HMLE and MCF10A cells, which lack the expression of these two proteins, will identify the genes are induced during EMT. We used microarray analysis to compare the gene expression profiles between the mammamry epithleial cells and the cells undergone EMT.
2020-01-10 | GSE143349 | GEO