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Epithelial mesenchymal transition

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https://www.readbyqxmd.com/read/28528511/met-overexpression-and-gene-amplification-prevalence-clinico-pathological-characteristics-and-prognostic-significance-in-a-large-cohort-of-patients-with-surgically-resected-nsclc
#1
William Sterlacci, Michael Fiegl, Mathias Gugger, Lukas Bubendorf, Spasenija Savic, Alexandar Tzankov
The prevalence of overexpression and amplification of the proto-oncogene mesenchymal epithelial transition (MET) in non-small cell lung cancer (NSCLC) varies greatly in the literature. Since MET is a potential treatment target, knowledge of its prevalence and prognostic importance is crucial. We investigated MET expression and gene status in 735 NSCLC cases using tissue microarrays. Prognostic significance as well as correlations with various clinico-pathological parameters were evaluated. The prevalence of MET overexpression was 17% and MET amplification was present in 2...
May 20, 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/28528181/overexpression-of-long-noncoding-rna-h19-indicates-a-poor-prognosis-for-cholangiocarcinoma-and-promotes-cell-migration-and-invasion-by-affecting-epithelial-mesenchymal-transition
#2
Yi Xu, Zhidong Wang, Xingming Jiang, Yunfu Cui
Cholangiocarcinoma (CCA) is a deadly disease that poorly responds to chemotherapy and radiotherapy and whose incidence has increased worldwide. Furthermore, long noncoding RNAs (lncRNAs) play important roles in multiple biological processes, including tumorigenesis. Specifically, H19, the first discovered lncRNA, has been reported to be overexpressed in diverse human carcinomas, but the overall biological role and clinical significance of H19 in CCA remains unknown. In the present study, expression levels of H19 were investigated in CCA tissues and cell lines and were correlated with clinicopathological features...
May 18, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28527754/hippo-signalling-in-intestinal-regeneration-and-cancer
#3
REVIEW
Alex Gregorieff, Jeffrey L Wrana
The Hippo pathway is a unique signalling module that regulates cell-specific transcriptional responses and responds to a wide range of intrinsic and extrinsic cues. Besides its classical role in restricting tissue size during development, Hippo signalling is now recognized to control numerous processes including cell proliferation, survival, cell fate determination, epithelial-to-mesenchymal transitions and cell migration. Because of its highly dynamic nature, the intestinal epithelium has served as an exceptional model to study the complex roles of Hippo signalling...
May 18, 2017: Current Opinion in Cell Biology
https://www.readbyqxmd.com/read/28527407/mechanisms-of-resistance-to-systemic-therapy-in-metastatic-castration-resistant-prostate-cancer
#4
REVIEW
Giuseppe Galletti, Benjamin I Leach, Linda Lam, Scott T Tagawa
Patients with metastatic castration-resistant prostate cancer (mCPRC) now have an unprecedented number of approved treatment options, including chemotherapies (docetaxel, cabazitaxel), androgen receptor (AR)-targeted therapies (enzalutamide, abiraterone), a radioisotope (radium-223) and a cancer vaccine (sipuleucel-T). However, the optimal treatment sequencing pathway is unknown, and this problem is exacerbated by the issues of primary and acquired resistance. This review focuses on mechanisms of resistance to AR-targeted therapies and taxane-based chemotherapy...
May 8, 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/28526992/epithelial-mesenchymal-transition-emt-in-metastatic-breast-cancer-in-omani-women
#5
Ritu Lakhtakia, Adil Aljarrah, Muhammad Furrukh, Shyam S Ganguly
Breast cancer (BC) in Oman affects younger women and has a more aggressive course. Clinical and biological variables like age, pregnancy, tumor size, type, grade, receptor expression and proliferation predict disease aggression but there is no direct predictor of metastasis except lymphovascular invasion. Epithelial-mesenchymal transition (EMT) is characterized by epithelial cells losing epithelial and acquiring mesenchymal morpho-immunophenotypic characteristics. In tumors, EMT-like transitions may signify a metastatic phenotype and have features in common with cancer stem cells (CSC) which show resistance to chemotherapy...
May 19, 2017: Cancer Microenvironment: Official Journal of the International Cancer Microenvironment Society
https://www.readbyqxmd.com/read/28526933/protection-of-tubular-epithelial-cells-during-renal-injury-via-post-transcriptional-control-of-bmp7
#6
Jiping Sun, Aiping Yin, Fei Zhao, Wenjing Zhang, Jia Lv, Jing Lv
Severe injury of renal tubular epithelial cells may cause acute renal failure, the progression of which results in renal fibrosis, and obstructive nephropathy. Transforming growth factor β 1 and bone morphogenic protein 7 (BMP7) play contradicting roles in and coordinate the process of epithelial-to-mesenchymal transition of renal tubular epithelial cells, but the molecular regulation of BMP7 remains ill-defined. Here, we addressed this question. We found that after induction of unilateral ureteral obstruction (UUO) in mice, the increases in BMP7 mRNA were much more pronounced than BMP7 protein in kidney, suggesting the presence of post-transcriptional control of BMP7...
May 19, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28526750/pdgf-controls-contact-inhibition-of-locomotion-by-regulating-n-cadherin-during-neural-crest-migration
#7
Isabel Bahm, Elias H Barriga, Antonina Frolov, Eric Theveneau, Paul Frankel, Roberto Mayor
A fundamental property of neural crest (NC) migration is Contact inhibition of locomotion (CIL), a process by which cells change their direction of migration upon cell contact. CIL has been proven to be essential for NC migration in amphibian and zebrafish by controlling cell polarity in a cell contact dependent manner. Cell contact during CIL requires the participation of the cell adhesion molecule N-cadherin, which starts to be expressed by NC cells as a consequence of the switch between E- and N-cadherins during epithelial to mesenchymal transition (EMT)...
May 19, 2017: Development
https://www.readbyqxmd.com/read/28525556/transcriptome-of-the-gsh-depleted-lens-reveals-changes-in-detoxification-and-emt-signaling-genes-transport-systems-and-lipid-homeostasis
#8
Jeremy A Whitson, Xiang Zhang, Mario Medvedovic, Jenny Chen, Zongbo Wei, Vincent M Monnier, Xingjun Fan
Purpose: To understand the effects of glutathione (GSH)-deficiency on genetic processes that regulate lens homeostasis and prevent cataractogenesis. Methods: The transcriptome of lens epithelia and fiber cells was obtained from C57BL/6 LEGSKO (lens GSH-synthesis knockout) and buthionine sulfoximine (BSO)-treated LEGSKO mice and compared to C57BL/6 wild-type mice using RNA-Seq. Transcriptomic data were confirmed by qPCR and Western blot/ELISA on a subset of genes...
May 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28524861/an-apicobasal-gradient-of-rac-activity-determines-protrusion-form-and-position
#9
Africa Couto, Natalie Ann Mack, Lucrezia Favia, Marios Georgiou
Each cell within a polarized epithelial sheet must align and correctly position a wide range of subcellular structures, including actin-based dynamic protrusions. Using in vivo inducible transgenes that can sense or modify Rac activity, we demonstrate an apicobasal gradient of Rac activity that is required to correctly form and position distinct classes of dynamic protrusion along the apicobasal axis of the cell. We show that we can modify the Rac activity gradient in genetic mutants for specific polarity proteins, with consequent changes in protrusion form and position and additionally show, using photoactivatable Rac transgenes, that it is the level of Rac activity that determines protrusion form...
May 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28524727/e-cadherin-%C3%AE-catenin-complex-a-target-for-anticancer-and-antimetastasis-plants-plant-derived-compounds
#10
Majid Tafrihi, Roohollah Nakhaei Sistani
Plants reputed to have cancer-inhibiting potential and putative active components derived from those plants have emerged as an exciting new field in cancer study. Some of these compounds have cancer-inhibiting potential in different clinical staging levels, especially metastasis. A few of them which stabilize cell-cell adhesions are controversial topics. This review article introduces some effective herbal compounds that target E-cadherin/β-catenin protein complex. In this article, at first, we briefly review the structure and function of E-cadherin and β-catenin proteins, Wnt signaling pathway, and its target genes...
May 19, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28523310/the-importance-of-bmp6-marker-within-the-process-of-epithelial-mesenchymal-transition-in-the-pleomorphic-adenoma-of-the-salivary-gland
#11
Anca Ştefania Enescu, Aurelia Enescu, Alina Nicoleta Căpitănescu, Mihaela Roxana Mitroi, Vlad Pădureanu, Elena Mădălina Dumitrescu, Dana Maria Albulescu, Marius Eugen Ciurea
The pleomorphic adenoma is the most frequently encountered tumor of the salivary glands, representing between 45% and 75% of the total number of the tumors of the salivary glands. According to the literature, there are many studies on the immunohistochemical aspects of the myoepithelial cells, present in the pleomorphic adenoma of the salivary gland. A big diversity of mono and polyclonal antibodies, such as the cytokeratins, muscular proteins and other markers, has been used. In our study, we investigated the immunohistochemical aspect of bone morphogenetic protein 6 (BMP6) marker concerning 15 cases of pleomorphic adenomas of the salivary glands...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28523000/mast-cells-and-mcpt4-chymase-promote-renal-impairment-after-partial-ureteral-obstruction
#12
Maguelonne Pons, Liza Ali, Walid Beghdadi, Luca Danelli, Marianne Alison, Lydia Celia Madjène, Jessica Calvo, Julien Claver, Shamila Vibhushan, Magnus Åbrink, Gunnar Pejler, Marie-Laurence Poli-Mérol, Michel Peuchmaur, Alaa El Ghoneimi, Ulrich Blank
Obstructive nephropathy constitutes a major cause of pediatric renal progressive disease. The mechanisms leading to disease progression are still poorly understood. Kidney fibrotic lesions are reproduced using a model of partial unilateral ureteral obstruction (pUUO) in newborn mice. Based on data showing significant mast cell (MC) infiltration in patients, we investigated the role of MC and murine MCPT4, a MC-released chymase, in pUUO using MC- (W(sh/sh)), MCPT4-deficient (Mcpt4(-/-)), and wild-type (WT) mice...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28522797/protective-effects-of-hydrogen-rich-saline-against-lipopolysaccharide-induced-alveolar-epithelial-to-mesenchymal-transition-and-pulmonary-fibrosis
#13
Wen-Wen Dong, Yun-Qian Zhang, Xiao-Yan Zhu, Yan-Fei Mao, Xue-Jun Sun, Yu-Jian Liu, Lai Jiang
BACKGROUND Fibrotic change is one of the important reasons for the poor prognosis of patients with acute respiratory distress syndrome (ARDS). The present study investigated the effects of hydrogen-rich saline, a selective hydroxyl radical scavenger, on lipopolysaccharide (LPS)-induced pulmonary fibrosis. MATERIAL AND METHODS Male ICR mice were divided randomly into 5 groups: Control, LPS-treated plus vehicle treatment, and LPS-treated plus hydrogen-rich saline (2.5, 5, or 10 ml/kg) treatment. Twenty-eight days later, fibrosis was assessed by determination of collagen deposition, hydroxyproline, and type I collagen levels...
May 19, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28522754/met-exon-14-mutation-encodes-an-actionable-therapeutic-target-in-lung-adenocarcinoma
#14
Xinyuan Lu, Nir Peled, John Greer, Wei Wu, Peter Choi, Alice H Berger, Sergio Wong, Kuang-Yu Jen, Youngho Seo, Byron Hann, Angela Brooks, Matthew Meyerson, Eric A Collisson
Targeting somatically activated oncogenes has revolutionized the treatment of non-small cell lung cancer (NSCLC). Mutations in the gene mesenchymal-epithelial transition (MET) near the exon 14 splice sites are recurrent in lung adenocarcinoma and cause exon skipping (METΔ14). Here we analyzed 4,422 samples from 12 different malignancies to estimate the rate of said exon skipping. METΔ14 mutation and transcript were most common in lung adenocarcinoma. Endogenously expressed levels of METΔ14 transformed human epithelial lung cells in a Hepatocyte growth factor (HGF)-dependent manner...
May 18, 2017: Cancer Research
https://www.readbyqxmd.com/read/28522595/human-salivary-peptide-histatin-1-stimulates-epithelial-and-endothelial-cell-adhesion-and-barrier-function
#15
Irene A van Dijk, Maria Laura Ferrando, Anne-Eva van der Wijk, Ron A Hoebe, Kamran Nazmi, Wouter J de Jonge, Przemek M Krawczyk, Jan G M Bolscher, Enno C I Veerman, Jan Stap
Histatins are multifunctional histidine-rich peptides secreted by the salivary glands and exclusively present in the saliva of higher primates, where they play a fundamental role in the protection of the oral cavity. Our previously published results demonstrated that histatin-1 (Hst1) promotes cell-substrate adhesion in various cell types and hinted that it could also be involved in cell-cell adhesion, a process of fundamental importance to epithelial and endothelial barriers. Here we explore the effects of Hst1 on cellular barrier function...
May 18, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28522590/notch-inhibitor-pf-03084014-inhibits-hepatocellular-carcinoma-growth-and-metastasis-via-suppression-of-cancer-stemness-due-to-reduced-activation-of-notch1-stat3
#16
Chuan Xing Wu, Aimin Xu, Cathy C Zhang, Peter Olson, Lin Chen, Terence K Lee, Tan To Cheung, Chung Mau Lo, Xiao Qi Wang
Aberrant activation of the Notch signaling pathway is implicated in many solid tumors, including hepatocellular carcinoma (HCC), indicating a potential use of Notch inhibitors for treatment. In this study, we investigated the antitumor and antimetastasis efficacy of the novel Notch inhibitor (γ-secretase inhibitor) PF-03084014 in HCC. HCC spherical cells (stem-like cancer cells), a sphere-derived orthotopic tumor model and one patient-derived xenograft (PDX) model were used in our experiment. We demonstrated that PF-03084014 inhibited the self-renewal and proliferation of cancer stem cells...
May 18, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28522553/glioblastoma-derived-cells-in-vitro-unveil-the-spectrum-of-drug-resistance-capabilty-comparative-study-of-tumour-chemosensitivity-in-different-culture-systems
#17
Monika Witusik-Perkowska, Magdalena Zakrzewska, Beata Sikorska, Wielislaw Papierz, Dariusz J Jaskolski, Janusz Szemraj, Pawel P Liberski
Resistance to cancer drugs is a complex phenomenon which could be influenced by in vitro conditions. However, tumour-derived cell cultures are routinely used for studies related to mechanisms of drug responsiveness or the search for new therapeutic approaches. The purpose of our work was to identify the potential differences in drug resistance and response to treatment of glioblastoma with the use of three in vitro models: traditional adherent culture, serum-free spheroid culture and novel adherent serum-free culture...
May 18, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28521610/sphk1-sphingosine-kinase-1-induces-epithelial-mesenchymal-transition-by-promoting-the-autophagy-linked-lysosomal-degradation-of-cdh1-e-cadherin-in-hepatoma-cells
#18
Hong Liu, Yan Ma, Hong-Wei He, Wu-Li Zhao, Rong-Guang Shao
SPHK1 (sphingosine kinase 1), a regulator of sphingolipid metabolites, plays a causal role in the development of hepatocellular carcinoma (HCC) through augmenting HCC invasion and metastasis. However, the mechanism by which SPHK1 signaling promotes invasion and metastasis in HCC remains to be clarified. Here, we reported that SPHK1 induced the epithelial-mesenchymal transition (EMT) by accelerating CDH1/E-cadherin lysosomal degradation and facilitating the invasion and metastasis of HepG2 cells. Initially, we found that SPHK1 promoted cell migration and invasion and induced the EMT process through decreasing the expression of CDH1, which is an epithelial marker...
May 4, 2017: Autophagy
https://www.readbyqxmd.com/read/28521486/fibronectin-induces-epithelial-mesenchymal-transition-in-human-breast-cancer-mcf-7-cells-via-activation-of-calpain
#19
Cheng-Lin Li, Dan Yang, Xin Cao, Fan Wang, Duan-Yang Hong, Jing Wang, Xiang-Chun Shen, Yan Chen
Fibronectin (FN) is a primary component of the mammary mesenchymal compartment and undergoes dramatic changes during breast cancer development. Increased FN expression is associated with an invasive and metastatic breast cancer phenotype. The present study demonstrated that FN causes an epithelial-mesenchymal transition (EMT)-like morphological change in MCF-7 breast cancer cells. FN stimulation caused the downregulation of epithelial markers E-cadherin and tight junction protein ZO-1, and the upregulation of mesenchymal markers N-cadherin and vimentin...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28521291/ube2j2-promotes-hepatocellular-carcinoma-cell-epithelial-mesenchymal-transition-and-invasion-in-vitro
#20
Shaopeng Chen, Ying Tan, Haihua Deng, Zhifa Shen, Yanhong Liu, Pan Wu, Chunyan Tan, Yuyang Jiang
Ubiquitin-conjugating enzyme E2 J2 (UBE2J2) is an ubiquitin proteasome component that responds to proteotoxic stress. We found that UBE2J2 was highly expressed in cellular protrusions of HCCLM3 metastatic hepatocellular carcinoma (HC) cells. Immunohistochemical analyses showed that UBE2J2 was expressed at higher levels in HC patient tissues than in corresponding non-tumor tissues. Because cellular protrusions are important for cell invasion, we hypothesized that UBE2J2 promotes HC cell invasion. We used chip-based surface plasmon resonance (SPR) to assess possible mechanisms of UBE2J2-regulated HCCLM3 cell invasion...
May 3, 2017: Oncotarget
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