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https://www.readbyqxmd.com/read/29138864/expression-level-of-microrna-200c-is-associated-with-cell-morphology-in-vitro-and-histological-differentiation-through-regulation-of-zeb1-2-and-e-cadherin-in-gastric-carcinoma
#1
Atsushi Kurata, Masatoshi Yamada, Shin-Ichiro Ohno, Shigeru Inoue, Hirotsugu Hashimoto, Koji Fujita, Masakatsu Takanashi, Masahiko Kuroda
Scirrhous type gastric cancer is characterized by diffuse infiltration of poorly differentiated adenocarcinoma cells and poor prognosis. Although association of poorly differentiated histology with reduction in E-cadherin expression, as well as association of microRNA (miR)-200c with E-cadherin through regulation of ZEB1/2, has been reported, participation of miR-200c in gastric carcinogenesis is not fully understood. We used 6 cell lines originating from gastric cancers, and investigated levels of miR-200c along with its target mRNAs ZEB1/2 and E-cadherin by qRT-PCR...
November 10, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29137924/nasal-and-otic-placode-specific-regulation-of-sox2-involves-both-activation-by-sox-sall4-synergism-and-multiple-repression-mechanisms
#2
Satoko Sugahara, Tooru Fujimoto, Hisato Kondoh, Masanori Uchikawa
Transcription factor gene Sox2 is expressed throughout sensory development, but the enhancers that regulate the gene vary depending on the developmental stages and tissues. To gain new insights into the gene regulatory network in sensory placode specification, regulation of the nasal-otic bispecific NOP1 enhancer of Sox2 was investigated in chicken embryos. Deletion and mutational analyses using electroporation showed that transcriptional repression mechanisms in combination with activation mechanisms determine placodal specificity...
November 11, 2017: Developmental Biology
https://www.readbyqxmd.com/read/29126969/snhg16-mir-216-5p-zeb1-signal-pathway-contributes-to-the-tumorigenesis-of-cervical-cancer-cells
#3
Hong Zhu, Yan Zeng, Chen-Chen Zhou, Weiping Ye
Long non-coding RNAs (lncRNAs) have been confirmed as crucial regulators in tumorgenesis. Small nucleolar RNA host gene 16 (SNHG16) has been recently uncovered to be a potential oncogene in several types of cancers. However, its expression level and potential role in cervical cancer remain uncertain. In our research, we assessed the expression level of SNHG16 in clinical cervical cancer tissues and cells. We made use of functional assays to determine the biological effects of SNHG16 on cell proliferation and migration of cervical cancer...
November 7, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29123181/carnosol-controls-the-human-glioblastoma-stemness-features-through-the-epithelial-mesenchymal-transition-modulation-and-the-induction-of-cancer-stem-cell-apoptosis
#4
Chiara Giacomelli, Simona Daniele, Letizia Natali, Caterina Iofrida, Guido Flamini, Alessandra Braca, M Letizia Trincavelli, Claudia Martini
A high cell proliferation rate, invasiveness and resistance to chemotherapy are the main features of glioblastoma (GBM). GBM aggressiveness has been widely associated both with a minor population of cells presenting stem-like properties (cancer stem-like cells, CSCs) and with the ability of tumor cells to acquire a mesenchymal phenotype (epithelial-mesenchymal transition, EMT). Carnosol (CAR), a natural inhibitor of MDM2/p53 complex, has been attracted attention for its anti-cancer effects on several tumor types, including GBM...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29120411/alternative-polyadenylation-of-zeb1-promotes-its-translation-during-genotoxic-stress-in-pancreatic-cancer-cells
#5
Ilaria Passacantilli, Valentina Panzeri, Pamela Bielli, Donatella Farini, Emanuela Pilozzi, Gianfranco Delle Fave, Gabriele Capurso, Claudio Sette
Pancreatic ductal adenocarcinoma (PDAC) is characterized by extremely poor prognosis. The standard chemotherapeutic drug, gemcitabine, does not offer significant improvements for PDAC management due to the rapid acquisition of drug resistance by patients. Recent evidence indicates that epithelial-to-mesenchymal transition (EMT) of PDAC cells is strictly associated to early metastasization and resistance to chemotherapy. However, it is not exactly clear how EMT is related to drug resistance or how chemotherapy influences EMT...
November 9, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/29119051/usp51-promotes-deubiquitination-and-stabilization-of-zeb1
#6
Zhicheng Zhou, Peijing Zhang, Xiaoyu Hu, Jongchan Kim, Fan Yao, Zhenna Xiao, Liyong Zeng, Liang Chang, Yutong Sun, Li Ma
ZEB1 is a transcription factor that induces epithelial-mesenchymal transition, tumor metastasis, and therapy resistance. ZEB1 protein is subject to ubiquitination and degradation, but the mechanism by which ZEB1 is stabilized in cells remains unclear. By screening a human deubiquitinase library, we identified USP51 as a deubiquitinase that binds, deubiquitinates, and stabilizes ZEB1. Depletion of USP51 in mesenchymal-like breast cancer cells led to downregulation of ZEB1 protein and mesenchymal markers, upregulation of E-cadherin, and inhibition of cell invasion...
2017: American Journal of Cancer Research
https://www.readbyqxmd.com/read/29116025/mir-200c-suppresses-endometriosis-by-targeting-malat1-in-vitro-and-in-vivo
#7
Zongwen Liang, Yijie Chen, Yuan Zhao, Chaoyi Xu, Anqi Zhang, Qiong Zhang, Danhan Wang, Jing He, Wenfeng Hua, Ping Duan
BACKGROUND: Endometriosis is a common, benign, and estrogen-dependent disease characterized by pelvic pain and infertility. To date, the pathogenesis of endometriosis remains unclear. Recent studies have demonstrated that noncoding RNAs, including microRNAs and long noncoding RNAs, play important roles in the development of endometriosis. METHODS: Expression profiling of miRNAs in endometrial tissue was characterized using microarrays. The most differentially expressed miRNAs were confirmed using quantitative reverse transcriptase-polymerase chain reaction analysis in additional ectopic endometrial (n = 27) and normal endometrial (n = 12) tissues...
November 7, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29115924/transcription-factor-e2f1-promotes-emt-by-regulating-zeb2-in-small-cell-lung-cancer
#8
Tingting Wang, Xufang Chen, Weiwei Qiao, Lijun Kong, Daqing Sun, Zunling Li
BACKGROUND: Epithelial-mesenchymal transition (EMT) is an early event in tumour invasion and metastasis, and widespread and distant metastasis at early stages is the typical biological behaviour in small cell lung cancer (SCLC). Our previous reports showed that high expression of the transcription factor E2F1 was involved in the invasion and metastasis of SCLC, but the role of E2F1 in the process of EMT in SCLC is unknown. METHODS: Immunohistochemistry was performed to evaluate the expressions of EMT related markers...
November 7, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29115509/microrna%C3%A2-211-suppresses-the-growth-and-metastasis-of-cervical-cancer-by-directly-targeting-zeb1
#9
Guangyuan Chen, Ping Huang, Jiabin Xie, Rihong Li
Of gynecological cancers, cervical cancer has the second highest incidence globally and is a major cause of cancer‑associated mortality in women. An increasing number of studies have reported that microRNAs (miRNAs) have important roles in cervical cancer carcinogenesis and progression through regulation of various critical protein‑coding genes. The aim of the present study was to investigate the expression and biological roles of miRNA‑211 (miR‑211) in cervical cancer and its underlying molecular mechanism...
November 7, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29113749/long-non-coding-rna-atb-promotes-emt-during-silica-induced-pulmonary-fibrosis-by-competitively-binding-mir-200c
#10
Yi Liu, Yan Li, Qi Xu, Wenxi Yao, Qiuyun Wu, Jiali Yuan, Weiwen Yan, Tiantian Xu, Xiaoming Ji, Chunhui Ni
Long non-coding RNAs (lncRNAs) are important signal transduction regulators that act by various patterns. However, little is known about the molecular mechanisms of lncRNA related pathways in occupational lung fibrosis. Our previous study found that epithelial-mesenchymal transition (EMT) was one of the key events in silica-induced pulmonary fibrosis. This study showed that the lncRNA-ATB promoted EMT by acting as a miR-200c sponge. miR-200c was identified by miRNA array as a potential target of lncRNA-ATB and verified by dual luciferase reporter gene together with RNA pull-down assays...
November 4, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29113674/lncrna-zeb1-as1-predicts-unfavorable-prognosis-in-gastric-cancer
#11
Yanliang Li, Xiaowen Wen, Longgang Wang, Xianjun Sun, Heng Ma, Zheng Fu, Leping Li
OBJECTIVES: LncRNA ZEB1 Antisense 1 (ZEB1-AS1) has been suggested to be an oncogenic role in human hepatocellular carcinoma, osteosarcoma, glioma and esophageal carcinoma progression. However, the clinical significance and biological function of ZEB1-AS1 in gastric cancer is poorly understood. METHODS: Levels of ZEB1-AS1 expression in gastric cancer tissues and cell lines were detected by qRT-PCR. Loss-of-function and gain-of-function studies were conducted to explore the biological function of ZEB1-AS1 in gastric cancer cells migration, invasion and EMT process...
December 2017: Surgical Oncology
https://www.readbyqxmd.com/read/29104620/expression-of-and-correlation-between-bcl6-and-zeb-family-members-in-patients-with-breast-cancer
#12
Lin Ang, Li Zheng, Jin Wang, Jin Huang, Hong-Guang Hu, Qiang Zou, Yang Zhao, Qiang-Ming Liu, Min Zhao, Zheng-Sheng Wu
B-cell lymphoma 6 (BCL6), a proto-oncogene, is an evolutionarily conserved zinc finger protein that functions as a transcriptional repressor. BCL6 is the master regulator of B-lymphocyte development, and it has been reported that BCL6 may serve an important role in breast cancer progression. The aim of the present study was to investigate the expression of BCL6, zinc finger E-box-binding homeobox (ZEB)1 and ZEB2 and their associations in breast cancer. The mRNA and protein expression of BCL6, ZEB1 and ZEB2 was assessed using in situ hybridization and immunohistochemistry, respectively, in 228 patients with breast cancer and 80 patients with benign breast disease...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29102917/mir-27b-and-mir-34a-enhance-docetaxel-sensitivity-of-prostate-cancer-cells-through-inhibiting-epithelial-to-mesenchymal-transition-by-targeting-zeb1
#13
Guangwei Zhang, Xin Tian, Yang Li, Zhiqiang Wang, Xiaodong Li, Chaoyang Zhu
Docetaxel resistance is a primary clinical obstacle in the therapy of advanced prostate cancer (PCa). Aberrant expression of miR-27b and miR-34a has been revealed to be implicated in drug resistance of different tumors. Nevertheless, the roles of miR-27b and miR-34a in docetaxel resistance of PCa and their molecular mechanisms are far from being elucidated. In this study, we found that miR-27b and miR-34a were significantly downregulated in docetaxel-resistant PCa cells. Gain-of-function experiments showed that overexpression of miR-27b or miR-34a enhanced docetaxel sensitivity and inhibited EMT in docetaxel-resistant PCa cells...
November 2, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29098031/astaxanthin-inhibits-gemcitabine-resistant-human-pancreatic-cancer-progression-through-emt-inhibition-and-gemcitabine-resensitization
#14
Tao Yan, Hai-Ying Li, Jian-Song Wu, Qiang Niu, Wei-Hong Duan, Qing-Zeng Han, Wang-Ming Ji, Tao Zhang, Wei Lv
Pancreatic cancer rapidly acquires resistance to chemotherapy resulting in its being difficult to treat. Gemcitabine is the current clinical chemotherapy strategy; however, owing to gemcitabine resistance, it is only able to prolong the life of patients with pancreatic cancer for a limited number of months. Understanding the underlying molecular mechanisms of gemcitabine resistance and selecting a suitable combination of agents for the treatment of pancreatic cancer is required. Astaxanthin (ASX) is able to resensitize gemcitabine-resistant human pancreatic cancer cells (GR-HPCCs) to gemcitabine...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29084210/zeb1-repressed-micrornas-inhibit-autocrine-signaling-that-promotes-vascular-mimicry-of-breast-cancer-cells
#15
E M Langer, N D Kendsersky, C J Daniel, G M Kuziel, C Pelz, K M Murphy, M R Capecchi, R C Sears
During normal tumor growth and in response to some therapies, tumor cells experience acute or chronic deprivation of nutrients and oxygen and induce tumor vascularization. While this occurs predominately through sprouting angiogenesis, tumor cells have also been shown to directly contribute to vessel formation through vascular mimicry (VM) and/or endothelial transdifferentiation. The extrinsic and intrinsic mechanisms underlying tumor cell adoption of endothelial phenotypes, however, are not well understood...
October 30, 2017: Oncogene
https://www.readbyqxmd.com/read/29079737/mir-1199-5p-and-zeb1-function-in-a-double-negative-feedback-loop-potentially-coordinating-emt-and-tumour-metastasis
#16
Maren Diepenbruck, Stefanie Tiede, Meera Saxena, Robert Ivanek, Ravi Kiran Reddy Kalathur, Fabiana Lüönd, Nathalie Meyer-Schaller, Gerhard Christofori
Epithelial tumour cells can gain invasive and metastatic capabilities by undergoing an epithelial-mesenchymal transition. Transcriptional regulators and post-transcriptional effectors like microRNAs orchestrate this process of high cellular plasticity and its malignant consequences. Here, using microRNA sequencing in a time-resolved manner and functional validation, we have identified microRNAs that are critical for the regulation of an epithelial-mesenchymal transition and of mesenchymal tumour cell migration...
October 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/29069783/tle1-inhibits-anoikis-and-promotes-tumorigenicity-in-human-lung-cancer-cells-through-zeb1-mediated-e-cadherin-repression
#17
Xin Yao, Tri Pham, Brandi Temple, Selena Gray, Cornita Cannon, Camry Hardy, Kamari Fletcher, Shubha Kale Ireland, Ahamed Hossain, Renwei Chen, Asim B Abdel-Mageed, Hector Biliran
The Transducin-like enhancer of split 1 (TLE1) corepressor protein is overexpressed in human lung tumors and is a putative lung-specific oncogene. However, the molecular mechanism underlying its oncogenic function remains to be delineated. Here, we report an important role of TLE1 in promoting lung tumorigenesis by a mechanism involving induction of anoikis resistance. Using the human lung adenocarcinoma A549 and immortalized bronchial epithelial BEAS-2B cell lines, we observed that TLE1 inhibits anoikis through transcriptional repression of E-cadherin gene...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/29060924/identification-of-key-genes-in-endometrioid-endometrial-adenocarcinoma-via-tcga-database
#18
Yanni Liu, Zeshun Yu, Fangfang Nan, Kexin Lu, Yunfang Wang, Yu Liu, Shuangyan Wei, Ruixue Wu, Ying Wang
BACKGROUND: Understanding the molecular mechanisms is important in development and therapy of endometrioid endometrial adenocarcinoma. OBJECTIVE: To identify key genes in endometrioid endometrial adenocarcinoma. METHODS: The data of mRNA, miRNA and DNA methylation were downloaded from The Cancer Genome Atlas (TCGA) database and differential analysis was performed. Then, bioinformatic analysis was used to explore the regulatory mechanisms of miRNA and DNA methylation on gene expression...
October 13, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/29052277/src-promotes-egf-induced-epithelial-to-mesenchymal-transition-and-migration-in-gastric-cancer-cells-by-upregulating-zeb1-and-zeb2-through-akt
#19
Lei Zhao, Xin Li, Na Song, Aodi Li, Kezuo Hou, Xiujuan Qu, Xiaofang Che, Yunpeng Liu
Epithelial-to-mesenchymal transition (EMT) plays important roles in the migration, invasion and metastasis of cancer cells. However, the role of Src in epidermal growth factor (EGF)-induced EMT and migration in gastric cancer cells remains to be clarified. In the current study, the effect of Src on EGF-stimulated EMT and migration was explored in gastric cancer cells. EGF induced EMT in gastric cancer cells and increased their migratory ability, which was accompanied by the phosphorylation of Src. PP2, the Src inhibitor, markedly suppressed EGF-mediated EMT and migration in gastric cancer cells...
October 20, 2017: Cell Biology International
https://www.readbyqxmd.com/read/29051323/epithelial-to-mesenchymal-transition-antagonizes-response-to-targeted-therapies-in-lung-cancer-by-suppressing-bim
#20
Kyung-A Song, Matthew J Niederst, Timothy L Lochmann, Aaron N Hata, Hidenori Kitai, Jungoh Ham, Konstantinos V Floros, Mark A Hicks, Haichuan Hu, Hillary E Mulvey, Yotam Drier, Daniel A R Heisey, Mark T Hughes, Neha U Patel, Elizabeth Lockerman, Angel R Garcia, Shawn Gillepsie, Hannah L Archibald, Maria Gomez-Caraballo, Tara J Nulton, Brad Windle, Zofia Piotrowska, Sinem E Sahingur, Shirley M Taylor, Mikhail G Dozmorov, Lecia V Sequist, Bradley E Bernstein, Hiromichi Ebi, Jeffrey A Engelman, Anthony C Faber
PURPOSE: Epithelial-to-mesenchymal transition (EMT) confers resistance to a number of targeted therapies and chemotherapies. However, it has been unclear why EMT promotes resistance, thereby impairing progress to overcome it. EXPERIMENTAL DESIGN: We have developed several models of EMT-mediated resistance to EGFR inhibitors (EGFRi) in EGFR mutant lung cancers to evaluate a novel mechanism of EMT-mediated resistance. Results: We observed that mesenchymal EGFR mutant lung cancers are resistant to EGFRi-induced apoptosis via insufficient expression of BIM, preventing cell death despite potent suppression of oncogenic signaling following EGFRi treatment...
October 19, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
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