scholarly journals Faculty Opinions recommendation of Jagged1-mediated Notch activation induces epithelial-to-mesenchymal transition through Slug-induced repression of E-cadherin.

2008 ◽  
Author(s):  
Arthur Mercurio
Keyword(s):  
Epithelial To Mesenchymal Transition ◽  
Mesenchymal Transition ◽  
Notch Activation ◽  
E Cadherin

scholarly journals Jagged1-mediated Notch activation induces epithelial-to-mesenchymal transition through Slug-induced repression of E-cadherin

2007 ◽  
Vol 204 (12) ◽  
pp. 2935-2948 ◽  
Author(s):  
Kevin G. Leong ◽  
Kyle Niessen ◽  
Iva Kulic ◽  
Afshin Raouf ◽  
Connie Eaves ◽  
...  
Keyword(s):  
Tumor Growth ◽  
Poor Prognosis ◽  
Epithelial To Mesenchymal Transition ◽  
Breast Tumors ◽  
Aberrant Expression ◽  
Mesenchymal Transition ◽  
Slug Expression ◽  
Tumor Growth And Metastasis ◽  
Notch Activation ◽  
E Cadherin

Aberrant expression of Jagged1 and Notch1 are associated with poor outcome in breast cancer. However, the reason that Jagged1 and/or Notch overexpression portends a poor prognosis is unknown. We identify Slug, a transcriptional repressor, as a novel Notch target and show that elevated levels of Slug correlate with increased expression of Jagged1 in various human cancers. Slug was essential for Notch-mediated repression of E-cadherin, which resulted in β-catenin activation and resistance to anoikis. Inhibition of ligand-induced Notch signaling in xenografted Slug-positive/E-cadherin–negative breast tumors promoted apoptosis and inhibited tumor growth and metastasis. This response was associated with down-regulated Slug expression, reexpression of E-cadherin, and suppression of active β-catenin. Our findings suggest that ligand-induced Notch activation, through the induction of Slug, promotes tumor growth and metastasis characterized by epithelial-to-mesenchymal transition and inhibition of anoikis.

scholarly journals Jagged1-mediated Notch activation induces epithelial-to-mesenchymal transition through Slug-induced repression of E-cadherin

2007 ◽  
Vol 179 (4) ◽  
pp. i6-i6 ◽  
Author(s):  
Kevin G. Leong ◽  
Kyle Niessen ◽  
Iva Kulic ◽  
Afshin Raouf ◽  
Connie Eaves ◽  
...  
Keyword(s):  
Epithelial To Mesenchymal Transition ◽  
Mesenchymal Transition ◽  
Notch Activation ◽  
E Cadherin

Metformin mediated reversal of epithelial to mesenchymal transition is triggered by epigenetic changes in E-cadherin promoter

2016 ◽  
Vol 94 (12) ◽  
pp. 1397-1409 ◽  
Author(s):  
Poulomi Banerjee ◽  
Harshini Surendran ◽  
Debabani Roy Chowdhury ◽  
Karthik Prabhakar ◽  
Rajarshi Pal
Keyword(s):  
Epithelial To Mesenchymal Transition ◽  
Epigenetic Changes ◽  
Mesenchymal Transition ◽  
E Cadherin

Epithelial-to-mesenchymal transition in cyst lining epithelial cells in an orthologous PCK rat model of autosomal-recessive polycystic kidney disease

2011 ◽  
Vol 300 (2) ◽  
pp. F511-F520 ◽  
Author(s):  
Hiroko Togawa ◽  
Koichi Nakanishi ◽  
Hironobu Mukaiyama ◽  
Taketsugu Hama ◽  
Yuko Shima ◽  
...  
Keyword(s):  
Kidney Disease ◽  
Epithelial Cells ◽  
Polycystic Kidney Disease ◽  
Autosomal Recessive ◽  
Epithelial To Mesenchymal Transition ◽  
Cell Contact ◽  
Polycystic Kidney ◽  
Mesenchymal Transition ◽  
Cyst Lining ◽  
E Cadherin

In polycystic kidney disease (PKD), cyst lining cells show polarity abnormalities. Recent studies have demonstrated loss of cell contact in cyst cells, suggesting induction of epithelial-to-mesenchymal transition (EMT). Recently, EMT has been implicated in the pathogenesis of PKD. To explore further evidence of EMT in PKD, we examined age- and segment-specific expression of adhesion molecules and mesenchymal markers in PCK rats, an orthologous model of human autosomal-recessive PKD. Kidneys from 5 male PCK and 5 control rats each at 0 days, 1, 3, 10, and 14 wk, and 4 mo of age were serially sectioned and stained with segment-specific markers and antibodies against E-cadherin, Snail1, β-catenin, and N-cadherin. mRNAs for E-cadherin and Snail1 were quantified by real-time PCR. Vimentin, fibronectin, and α-smooth muscle actin (α-SMA) expressions were assessed as mesenchymal markers. E-cadherin expression pattern was correlated with the disease pathology in that tubule segments showing the highest expression in control had much severer cyst formation in PCK rats. In PCK rats, E-cadherin and β-catenin in cystic tubules was attenuated and localized to lateral areas of cell-cell contact, whereas nuclear expression of Snail1 increased in parallel with cyst enlargement. Some epithelial cells in large cysts derived from these segments, especially in adjacent fibrotic areas, showed positive immunoreactivity for vimentin and fibronectin. In conclusion, these findings suggest that epithelial cells in cysts acquire mesenchymal features in response to cyst enlargement and participate in progressive renal fibrosis. Our study clarified the nephron segment-specific cyst profile related to EMT in PCK rats. EMT may play a key role in polycystic kidney disease.

scholarly journals Concomitant Notch activation and p53 deletion trigger epithelial-to-mesenchymal transition and metastasis in mouse gut

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Maia Chanrion ◽  
Inna Kuperstein ◽  
Cédric Barrière ◽  
Fatima El Marjou ◽  
David Cohen ◽  
...  
Keyword(s):  
Epithelial To Mesenchymal Transition ◽  
Mesenchymal Transition ◽  
Notch Activation

scholarly journals Hepatitis C virus depends on E-cadherin as an entry factor and regulates its expression in epithelial-to-mesenchymal transition

2016 ◽  
Vol 113 (27) ◽  
pp. 7620-7625 ◽  
Author(s):  
Qisheng Li ◽  
Catherine Sodroski ◽  
Brianna Lowey ◽  
Cameron J. Schweitzer ◽  
Helen Cha ◽  
...  
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Cell Surface ◽  
Viral Entry ◽  
Epithelial To Mesenchymal Transition ◽  
Hcv Infection ◽  
Hcv Rna ◽  
Entry Site ◽  
Mesenchymal Transition ◽  
E Cadherin

Hepatitis C virus (HCV) enters the host cell through interactions with a cascade of cellular factors. Although significant progress has been made in understanding HCV entry, the precise mechanisms by which HCV exploits the receptor complex and host machinery to enter the cell remain unclear. This intricate process of viral entry likely depends on additional yet-to-be-defined cellular molecules. Recently, by applying integrative functional genomics approaches, we identified and interrogated distinct sets of host dependencies in the complete HCV life cycle. Viral entry assays using HCV pseudoparticles (HCVpps) of various genotypes uncovered multiple previously unappreciated host factors, including E-cadherin, that mediate HCV entry. E-cadherin silencing significantly inhibited HCV infection in Huh7.5.1 cells, HepG2/miR122/CD81 cells, and primary human hepatocytes at a postbinding entry step. Knockdown of E-cadherin, however, had no effect on HCV RNA replication or internal ribosomal entry site (IRES)-mediated translation. In addition, an E-cadherin monoclonal antibody effectively blocked HCV entry and infection in hepatocytes. Mechanistic studies demonstrated that E-cadherin is closely associated with claudin-1 (CLDN1) and occludin (OCLN) on the cell membrane. Depletion of E-cadherin drastically diminished the cell-surface distribution of these two tight junction proteins in various hepatic cell lines, indicating that E-cadherin plays an important regulatory role in CLDN1/OCLN localization on the cell surface. Furthermore, loss of E-cadherin expression in hepatocytes is associated with HCV-induced epithelial-to-mesenchymal transition (EMT), providing an important link between HCV infection and liver cancer. Our data indicate that a dynamic interplay among E-cadherin, tight junctions, and EMT exists and mediates an important function in HCV entry.

scholarly journals miR-204 Shifts the Epithelial to Mesenchymal Transition in Concert with the Transcription Factors RUNX2, ETS1, and cMYB in Prostate Cancer Cell Line Model

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Krassimira Todorova ◽  
Diana Zasheva ◽  
Kristiyan Kanev ◽  
Soren Hayrabedyan
Keyword(s):  
Prostate Cancer ◽  
Transcription Factors ◽  
Cancer Cell ◽  
Epithelial To Mesenchymal Transition ◽  
Prostate Cancer Cell ◽  
Cancer Cell Line ◽  
Prostate Cancer Cell Line ◽  
Mesenchymal Transition ◽  
Cell Line Model ◽  
E Cadherin

Epithelial to mesenchymal transition is an essential step in advanced cancer development. Many master transcription factors shift their expression to drive this process, while noncoding RNAs families like miR-200 are found to restrict it. In this study we investigated how the tumor suppressor miR-204 and several transcription factors modulate main markers of mesenchymal transformation like E- and N-cadherin, SLUG, VEGF, and SOX-9 in prostate cancer cell line model (LNCaP, PC3, VCaP, and NCI-H660). We found that SLUG, E-cadherin, and N-cadherin are differentially modulated by miR-204, using miR-204 specific mimics and inhibitors and siRNA gene silencing (RUNX2, ETS-1, and cMYB). The genome perturbation associated TMPRSS2-ERG fusion coincided with shift from tumor-suppressor to tumor-promoting activity of this miRNA. The ability of miR-204 to suppress cancer cell viability and migration was lost in the fusion harboring cell lines. We found differential E-cadherin splicing corroborating to miR-204 modulatory effects. RUNX2, ETS1, and cMYB are involved in the regulation of E-cadherin, N-cadherin, and VEGFA expression. RUNX2 knockdown results in SOX9 downregulation, while ETS1 and cMYB silencing result in SOX9 upregulation in VCaP cells. Their expression was found to be also methylation dependent. Our study provides means for understanding cancer heterogeneity in regard to adapted therapeutic approaches development.

scholarly journals β-Arrestin-1 expression and epithelial-to-mesenchymal transition in laryngeal carcinoma

2019 ◽  
Vol 34 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Gino Marioni ◽  
Lorenzo Nicolè ◽  
Rocco Cappellesso ◽  
Rosario Marchese-Ragona ◽  
Elena Fasanaro ◽  
...  
Keyword(s):  
Epithelial To Mesenchymal Transition ◽  
Disease Free Survival ◽  
The Novel ◽  
Free Survival ◽  
Mesenchymal Transition ◽  
End Point ◽  
Zeb2 Expression ◽  
E Cadherin

Aim: The novel primary end-point of the present study was to ascertain β-arrestin-1 expression in a cohort of consecutive patients with laryngeal squamous cell carcinoma (LSCC) with information available on their cigarette-smoking habits. A secondary end-point was to conduct a preliminary clinical and pathological investigation into the possible role of β-arrestin-1 in the epithelial-to-mesenchymal transition (EMT), identified by testing for E-cadherin, Zeb1, and Zeb2 expression, in the setting of LSCC. Methods: The expression of β-arrestin-1, E-cadherin, zeb1, and zeb2 was ascertained in 20 consecutive LSCCs. Results: Statistical analysis showed no significant associations between β-arrestin-1 and EMT (based on the expression of E-cadherin, Zeb1, and Zeb2). The combined effect of nicotine and β-arrestin-1 was significantly associated with a shorter disease-free survival ( P=0.01) in our series of LSCC. This latter result was also confirmed in an independent, publicly available LSCC cohort ( P=0.047). Conclusions: Further investigations on larger series (ideally in prospective settings) are needed before we can consider closer follow-up protocols and/or more aggressive treatments for patients with LSCC and a combination of nicotine exposure and β-arrestin-1 positivity in tumor cells at the time of their diagnosis. Further studies on how β-arrestin functions in cancer via different signaling pathways might reveal potential targets for the treatment of even advanced laryngeal malignancies.

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