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https://www.readbyqxmd.com/read/28075045/interplay-between-long-noncoding-rna-zeb1-as1-and-mir-200s-regulates-osteosarcoma-cell-proliferation-and-migration
#1
Chibo Liu, Chunqin Pan, Yanqun Cai, Haibao Wang
In our previous study we found long noncoding RNA ZEB1-AS1 is upregulated and functions as an oncogene in osteosarcoma. MiR-200 family (miR-200s) functions as tumor suppressor via directly targeting ZEB1 in various cancers. In this study we further investigate the potential interplay between ZEB1-AS1, miR-200s, and ZEB1 in osteosarcoma. Our results showed that ZEB1-AS1 functions as a molecular sponge for miR-200s and relieves the inhibition of ZEB1 caused by miR-200s. ZEB1-AS1 and miR-200s reciprocally negatively regulate each other...
January 11, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28066651/paradoxical-functions-of-zeb1-in-egfr-mutant-lung-cancer-tumor-suppressor-and-driver-of-therapeutic-resistance
#2
COMMENT
Zachary A Yochum, Mark A Socinski, Timothy F Burns
No abstract text is available yet for this article.
November 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28065642/mesenchymal-to-epithelial-transition-mediated-by-cdh1-promotes-spontaneous-reprogramming-of-male-germline-stem-cells-to-pluripotency
#3
Junhui An, Yu Zheng, Christina Tenenhaus Dann
Cultured spermatogonial stem cells (GSCs) can spontaneously form pluripotent cells in certain culture conditions. However, GSC reprogramming is a rare event that is largely unexplained. We show GSCs have high expression of mesenchymal to epithelial transition (MET) suppressors resulting in a developmental barrier inhibiting GSC reprogramming. Either increasing OCT4 or repressing transforming growth factor β (TGF-β) signaling promotes GSC reprogramming by upregulating CDH1 and boosting MET. Reducing ZEB1 also enhances GSC reprogramming through its direct effect on CDH1...
December 24, 2016: Stem Cell Reports
https://www.readbyqxmd.com/read/28063065/effects-of-long-noncoding-rna-ror-on-tamoxifen-resistance-of-breast-cancer-cells-by-regulating-microrna-205
#4
Hong-Yan Zhang, Feng Liang, Jian-Wei Zhang, Fei Wang, Li Wang, Xi-Gang Kang
PURPOSE: To explore how long noncoding RNA-ROR (lncRNA-ROR) affects the tamoxifen resistance of breast cancer cells. METHODS: Breast epithelial (MCF10A), breast cancer (MCF7), and natural tamoxifen-resistant breast cancer (MDA-MB-231) cell lines were selected, and the relative lncRNA-ROR expressions were detected using quantitative real-time polymerase chain reaction (qRT-PCR). In vitro induction of TR5 cell line was performed. There were six groups: MCF7, MCF7/TR5, MDA-MB-231, MCF7-ROR, MCF7/TR5 ROR-siRNA, and the MDA-MB-231 ROR-siRNA groups...
January 6, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28053127/potent-emt-and-csc-phenotypes-are-induced-by-oncostatin-m-in-pancreatic-cancer
#5
Jacob M Smigiel, Neetha Parameswaran, Mark W Jackson
: Pancreatic ductal adenocarcinoma (PDAC) is referred to as a silent killer due to the lack of clear symptoms, a lack of early detection methods, and a high frequency of metastasis at diagnosis. In addition, pancreatic cancer is remarkably resistant to chemotherapy, and clinical treatment options remain limited. The tumor microenvironment (TME) and associated factors are important determinants of metastatic capacity and drug resistance. Here, oncostatin M (OSM), an IL-6 cytokine family member, was identified as an important driver of mesenchymal and cancer stem cell (CSC) phenotypes...
January 4, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28046031/confirmation-of-the-ovol2-promoter-mutation-c-307t-c-in-posterior-polymorphous-corneal-dystrophy-1
#6
Doug D Chung, Ricardo F Frausto, Aleck E Cervantes, Katherine M Gee, Marina Zakharevich, Evelyn M Hanser, Edwin M Stone, Elise Heon, Anthony J Aldave
PURPOSE: To identify the genetic basis of posterior polymorphous corneal dystrophy (PPCD) in families mapped to the PPCD1 locus and in affected individuals without ZEB1 coding region mutations. METHODS: The promoter, 5' UTR, and coding regions of OVOL2 was screened in the PPCD family in which linkage analysis established the PPCD1 locus and in 26 PPCD probands who did not harbor a ZEB1 mutation. Copy number variation (CNV) analysis in the PPCD1 and PPCD3 intervals was performed on DNA samples from eight probands using aCGH...
2017: PloS One
https://www.readbyqxmd.com/read/28042023/diverse-pathways-of-epithelial-mesenchymal-transition-related-with-cancer-progression-and-metastasis-and-potential-effects-of-endocrine-disrupting-chemicals-on-epithelial-mesenchymal-transition-process
#7
Hae-Miru Lee, Kyung-A Hwang, Kyung-Chul Choi
Endocrine disrupting chemicals (EDCs) are natural or synthetic compounds that interfere with normal functions of natural hormones in the body, leading to a disruption of the endocrine system. Specifically, EDCs have the potential to cause formation of several hormone-dependent cancers, including breast, ovarian, and prostate cancers. Epithelial mesenchymal transition (EMT) process by which epithelial cells lose their cell polarity and cell-cell adhesion and acquire mesenchymal phenotype is closely associated with malignant transformation and the initiation of cancer metastasis...
December 29, 2016: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28028835/timp4-expression-is-regulated-by-mir-200b-3p-in-prostate-cancer-cells
#8
Marek Janiak, Wiktor Paskal, Beata Rak, Filip Garbicz, Robert Jarema, Krzysztof Sikora, Paweł Włodarski
In prostate cancer TIMP4 expression level fluctuates with tumor progression. The mechanism and factors influencing its expression remain unclear. The aim of the study was to test the hypothesis on regulation of TIMP4 by microRNA-200b-3p. The levels of TIMP4 and miR-200b-3p expression were determined by real time PCR in 27 prostate carcinomas and eight benign prostatic hyperplasia samples. We found that miR-200b-3p positively correlated with TIMP4 expression in cancer samples (r = 0.46; p < 0.02). Moreover, mean miR-200b-3p level and TIMP4 expression were both higher in cancer tissues compared to benign prostatic hyperplasia samples (p > 0...
December 28, 2016: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/27998927/niche-wnt5a-regulates-the-actin-cytoskeleton-during-regeneration-of-hematopoietic-stem-cells
#9
Christina Schreck, Rouzanna Istvánffy, Christoph Ziegenhain, Theresa Sippenauer, Franziska Ruf, Lynette Henkel, Florian Gärtner, Beate Vieth, M Carolina Florian, Nicole Mende, Anna Taubenberger, Áine Prendergast, Alina Wagner, Charlotta Pagel, Sandra Grziwok, Katharina S Götze, Jochen Guck, Douglas C Dean, Steffen Massberg, Marieke Essers, Claudia Waskow, Hartmut Geiger, Mathias Schiemann, Christian Peschel, Wolfgang Enard, Robert A J Oostendorp
Here, we show that the Wnt5a-haploinsufficient niche regenerates dysfunctional HSCs, which do not successfully engraft in secondary recipients. RNA sequencing of the regenerated donor Lin(-) SCA-1(+) KIT(+) (LSK) cells shows dysregulated expression of ZEB1-associated genes involved in the small GTPase-dependent actin polymerization pathway. Misexpression of DOCK2, WAVE2, and activation of CDC42 results in apolar F-actin localization, leading to defects in adhesion, migration and homing of HSCs regenerated in a Wnt5a-haploinsufficient microenvironment...
January 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27998868/-the-microrna-mir-205-inhibits-epithelial-messenchymal-transition-in-hk-2-cells-by-down-regulating-zeb1-and-zeb2-expressions
#10
Luo-Yuan Cao, Jing Yang, Xian-Guo Fu, Ying-Hua Lin, Feng Lin, Bao-Ying Huang
OBJECTIVE: To explore the role of miR-205 in regulating epithelial-messenchymal transition (EMT) in proximal tubular cell line HK-2 cells and the underlying mechanism. METHODS: HK-2 cells transfected with miR-205 mimics or a scrambled control sequence were examined for miR-205 expressions and mRNA levels of ZEB1, E-cadherin, and α-SMA using real-time qPCR; the protein levels of ZEB1, ZEB2, E-cadherin, and α-SMA were detected with Western blotting. Immunohistochemistry was performed to examine the ectopic expression of β-catenin and E-cadherin expression in the cells...
December 20, 2016: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/27983677/erratum-roche-j-et-al-global-decrease-of-histone-h3k27-acetylation-in-zeb1-induced-epithelial-to-mesenchymal-transition-in-lung-cancer-cells-cancers-2013-5-334-356
#11
Joëlle Roche, Patrick Nasarre, Robert Gemmill, Aleksander Baldys, Julien Pontis, Christopher Korch, Joëlle Guilhot, Slimane Ait-Si-Ali, Harry Drabkin
n/a.
December 15, 2016: Cancers
https://www.readbyqxmd.com/read/27966519/combretastatin-a4-regulates-proliferation-migration-invasion-and-apoptosis-of-thyroid-cancer-cells-via-pi3k-akt-signaling-pathway
#12
Weixin Liang, Yongqiang Lai, Mingzhang Zhu, Shangshu Huang, Weizhao Feng, Xiaoyu Gu
BACKGROUND Combretastatin A4 (CA4) is a potential therapeutic candidate for a variety of human cancer treatments. However, the inhibitive effects of CA4 on thyroid cancer cells are still not well-clarified. This study aimed to investigate the potential effect of CA4 on thyroid cancer cells, as well as underlying mechanism. MATERIAL AND METHODS Human thyroid papillary carcinoma cell line TPC1 was pre-treated with 5 concentrations of CA4 (0, 1, 2, 5, or 10 μM) for 2 h. Cell proliferation was determined by 3-(4, 5-dimethyl-2- thiazolyl)-2, 5-diphenyl -2-H-tetrazolium bromide (MTT) assay...
December 14, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27965283/zeb1-induced-tumourigenesis-requires-senescence-inhibition-via-activation-of-dkk1-mutant-p53-mdm2-ctbp-and-repression-of-macroh2a1
#13
Oriol de Barrios, Balázs Győrffy, María Jesús Fernández-Aceñero, Ester Sánchez-Tilló, Lidia Sánchez-Moral, Laura Siles, Anna Esteve-Arenys, Gaël Roué, José I Casal, Douglas S Darling, Antoni Castells, Antonio Postigo
OBJECTIVE: Understand the role of ZEB1 in the tumour initiation and progression beyond inducing an epithelial-to-mesenchymal transition. DESIGN: Expression of the transcription factor ZEB1 associates with a worse prognosis in most cancers, including colorectal carcinomas (CRCs). The study uses survival analysis, in vivo mouse transgenic and xenograft models, gene expression arrays, immunostaining and gene and protein regulation assays. RESULTS: The poorer survival determined by ZEB1 in CRCs depended on simultaneous high levels of the Wnt antagonist DKK1, whose expression was transcriptionally activated by ZEB1...
December 13, 2016: Gut
https://www.readbyqxmd.com/read/27930974/mir-200c-enhances-sensitivity-of-drug-resistant-non-small-cell-lung-cancer-to-gefitinib-by-suppression-of-pi3k-akt-signaling-pathway-and-inhibites-cell-migration-via-targeting-zeb1
#14
Guohua Zhou, Fangli Zhang, Yu Guo, Jianfei Huang, Yaqiong Xie, Shuanglei Yue, Minghui Chen, Hao Jiang, Mengjie Li
Acquired resistance to epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs) is a major obstacle in the treatment of non-small cell lung cancer (NSCLC) patients. We explored the role of miR-200c in modulating the sensitivity of gefitinib-resistant NSCLC cells and examined the underlying mechanism. The gefitinib-resistant cell line PC-9-ZD and its parental PC-9 cells were used. Growth inhibition was detected by MTT assay. The cell apoptosis was detected by Annexin V/PI assay. Cell migration was assessed by wound-healing assay...
January 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27930335/chromosome-instability-drives-phenotypic-switching-to-metastasis
#15
ChongFeng Gao, Yanli Su, Julie Koeman, Elizabeth Haak, Karl Dykema, Curt Essenberg, Eric Hudson, David Petillo, Sok Kean Khoo, George F Vande Woude
Chromosome instability (CIN) is the most striking feature of human cancers. However, how CIN drives tumor progression to metastasis remains elusive. Here we studied the role of chromosome content changes in generating the phenotypic dynamics that are required for metastasis. We isolated epithelial and mesenchymal clones from human carcinoma cell lines and showed that the epithelial clones were able to generate mesenchymal variants, which had the potential to further produce epithelial revertants autonomously...
December 20, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27925454/rap1a-promotes-ovarian-cancer-metastasis-via-activation-of-erk-p38-and-notch-signaling
#16
Lili Lu, Jingshu Wang, Yougen Wu, Ping Wan, Gong Yang
As one of the Ras-associated proteins, Rap1A has been linked to cancer initiation and development. However, the precise function of Rap1A in ovarian cancer is still not understood. Here, we show that Rap1A promotes ovarian cancer tumorigenesis and metastasis via stimulating cell proliferation, migration and invasion both in vivo and in vitro. Mechanistic study showed that Rap1A activates extracellular signal-regulated kinase (ERK), p38 mitogen-activated protein kinase (MAPK) and Notch pathways, leading to the enhanced expression of several epithelial-mesenchymal transition (EMT) markers such as slug, zeb1, vimentin, fibronectin, and MMP9...
December 2016: Cancer Medicine
https://www.readbyqxmd.com/read/27924058/foxo1-inhibits-the-invasion-and-metastasis-of-hepatocellular-carcinoma-by-reversing-zeb2-induced-epithelial-mesenchymal-transition
#17
Tianxiu Dong, Yu Zhang, Yaodong Chen, Pengfei Liu, Tingting An, Jiuwei Zhang, Haichao Yang, Wenjing Zhu, Xiuhua Yang
The epithelial-to-mesenchymal transition (EMT) program is critical for epithelial cell cancer progression and fibrotic diseases. FOXO1 influences a broad range of physiological and pathological processes. However, the mechanism by which FOXO1 inhibits EMT is not fully understood. In this study, we demonstrated that FOXO1 overexpression inhibited cell motility and invasiveness in vitro and inhibited lung metastasis in vivo. In addition, we found that FOXO1 couldreverse the EMT program. FOXO1 silencing by siRNA in hepatocellular carcinoma (HCC) cell lines enhanced the expression of mesenchymal markers and decreased the expression of the epithelial markers...
December 3, 2016: Oncotarget
https://www.readbyqxmd.com/read/27923654/zeb1-is-neither-sufficient-nor-required-for-epithelial-mesenchymal-transition-in-ls174t-colorectal-cancer-cells
#18
Sabine Jägle, Annika Dertmann, Monika Schrempp, Andreas Hecht
Epithelial-mesenchymal transition (EMT) is implicated in metastases formation and acquired therapy resistance in several tumor entities. The two transcription factors SNAIL1 and ZEB1 are thought to be master regulators of EMT and to form a core regulatory network required for EMT-associated transcriptional reprogramming. Yet, inducible EMT models show the sequential upregulation first of SNAIL1 and only subsequently of ZEB1. Therefore, SNAIL1 and ZEB1 might be differentially needed for the onset and propagation of EMT...
December 5, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27916370/tanshinone-iia-attenuates-epithelial-mesenchymal-transition-to-inhibit-the-tracheal-narrowing
#19
Hongtao Duan, Lijie Ma, Honggang Liu, Yong Zhang, Zhipei Zhang, Xiaolong Yan, Xiaofei Li
BACKGROUND: This study examines the effects of tanshinone IIA (TIIA) on epithelial-mesenchymal transition (EMT) in tracheal transplantation and the ability of TIIA to inhibit tracheal narrowing after tracheal transplantation. Mechanisms that may be involved in this process are also explored. METHODS: Human bronchial epithelial cells were treated in vitro with TGF-β1 for 72 h. The cells were pretreated with TIIA (40 μg/mL) or DMSO for 2 h before TGF-β1 stimulation...
November 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27908834/gamma-secretase-inhibitor-impairs-epithelial-to-mesenchymal-transition-induced-by-tgf-%C3%AE-in-ovarian-tumor-cell-lines
#20
M C Pazos, D Abramovich, A Bechis, P Accialini, F Parborell, M Tesone, G Irusta
Ovarian cancer is characterized by being highly metastatic, a feature that represents the main cause of failure of the treatment. This study investigated the effects of γ-secretase inhibition on the TGF-β-induced epithelial-mesenchymal transition (EMT) process in ovarian cancer cell lines. SKOV3 cells incubated in the presence of TGF-β showed morphological and biochemical changes related to EMT, which were blocked by co-stimulation with TGF-β and the γ-secretase inhibitor DAPT. In SKOV3 and IGROV1 cells, the co-stimulation blocked the cadherin switch and the increase in the transcription factors Snail, Slug, Twist and Zeb1 induced by TGF-β...
January 15, 2017: Molecular and Cellular Endocrinology
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