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https://www.readbyqxmd.com/read/29155818/snail1-mediated-downregulation-of-foxa-proteins-facilitates-the-inactivation-of-transcriptional-enhancer-elements-at-key-epithelial-genes-in-colorectal-cancer-cells
#1
Sabine Jägle, Hauke Busch, Vivien Freihen, Sven Beyes, Monika Schrempp, Melanie Boerries, Andreas Hecht
Phenotypic conversion of tumor cells through epithelial-mesenchymal transition (EMT) requires massive gene expression changes. How these are brought about is not clear. Here we examined the impact of the EMT master regulator SNAIL1 on the FOXA family of transcription factors which are distinguished by their particular competence to induce chromatin reorganization for the activation of transcriptional enhancer elements. We show that the expression of SNAIL1 and FOXA genes is anticorrelated in transcriptomes of colorectal tumors and cell lines...
November 20, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/29138797/activation-of-adrenergic-receptor-%C3%AE-2-promotes-tumor-progression-and-epithelial-mesenchymal-transition-in-tongue-squamous-cell-carcinoma
#2
Haichao Liu, Cheng Wang, Nan Xie, Zehang Zhuang, Xiqiang Liu, Jinsong Hou, Hongzhang Huang
Tongue squamous cell carcinoma (TSCC) is more aggressive than other cancers in the head and neck region because of its potential for metastasis. Recently, β2‑adrenergic receptor (β2‑AR) has been reported to be a potential promoter in various types of solid cancer. However, the role of β2‑AR and its effect on TSCC is not well documented. Histological staining, western blot analysis, migration and invasion assay were used. In this study, the expression of β2‑AR was increased in TSCC tissue compared with adjacent non‑cancerous epithelium...
November 9, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29117943/fbxo31-suppresses-gastric-cancer-emt-by-targeting-snail1-for-proteasomal-degradation
#3
Shuiyan Zou, Cunying Ma, Fenghua Yang, Xia Xu, Jihui Jia, Zhifang Liu
The F-box protein FBXO31, a component of the Skp1/Cul1/F-box (SCF) E3 ubiquitin ligase complex, plays an important regulatory role in neuronal development, stress response and tumorigenesis. Our recent report indicates that FBXO31 functions as a tumor suppressor in gastric cancer and the loss of FBXO31 protein is associated with a higher malignant phenotype and poorer prognosis. However, little is known about the underlying mechanism. In this study, FBXO31 inhibits gastric cancer progression by suppressing the epithelial-mesenchymal transition (EMT)...
November 8, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29104639/snail1-is-positively-correlated-with-atrial-fibrosis-in-patients-with-atrial-fibrillation-and-rheumatic-heart-disease
#4
Furong Guo, Xin Yi, Mingjiang Li, Jinrong Fu, Sha Li
The present study investigated the association between Snail1 and atrial fibrosis in patients with atrial fibrillation (AF) and rheumatic heart disease (RHD) and to determine the possible mechanism underlying this interrelation. A total of 19 patients were included in the current study and were divided into two groups: A sinus rhythm (SR) group (n=9) and an AF group (n=10). All patients underwent heart valve replacement surgery, during which ~200 mg right atrium tissue was obtained. Hematoxylin and eosin and Masson's trichrome-stained sections were used to evaluate the morphological changes of cardiomyocytes and the level of fibrosis...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29101499/combined-detection-of-twist1-snail1-and-squamous-cell-carcinoma-antigen-for-the-prognostic-evaluation-of-invasion-and-metastasis-in-cervical-squamous-cell-carcinoma
#5
Huilun Yang, Haiyang Hu, Yanling Gou, Yuhong Hu, Hui Li, Hongwei Zhao, Beidi Wang, Peiling Li, Zongfeng Zhang
BACKGROUND: Cervical cancer is one of the most common malignant tumours of the female reproductive system, ranking second only to breast cancer in morbidity worldwide. Essential features of the progression of cervical cancer are invasion and metastasis, which are closely related to disease prognosis and mortality rate. At the present time there is no effective method to evaluate cancer invasion and metastasis before surgery. Here we report our study on molecular changes in biopsy tissue for the prognostic evaluation of cancer invasion and metastasis...
November 3, 2017: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29101304/functional-role-of-a-novel-long-noncoding-rna-ttn-as1-in-esophageal-squamous-cell-carcinoma-progression-and-metastasis
#6
Chenyu Lin, Nan Zhang, Ying Wang, Yuanshu Wang, Changying Guo, Edouard Nice, Erhao Zhang, Liting Yu, Mengwei Zhang, Chen Liu, Lirong Hu, Jingchao Hao, Weiyan Qi, Hanmei Xu
PURPOSE: Emerging studies demonstrate that long non-coding RNAs (lncRNAs)participate in the regulation of various cancers. In the current study, a novel lncRNA-TTN-AS1 has been identified and explored in esophageal squamous cell carcinoma (ESCC). EXPERIMENTAL DESIGN: To discover a new regulatory circuitry in which RNAs crosstalk with each other, the transcriptome of lncRNA-miRNA-mRNA from ESCC and adjacent non-malignant specimens were analyzed using multiple microarrays and diverse bioinformatics platforms...
November 3, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29069716/mir-338-3p-inhibits-epithelial-mesenchymal-transition-and-metastasis-in-hepatocellular-carcinoma-cells
#7
Jing-Song Chen, Li-Li Liang, Hong-Xu Xu, Fan Chen, Shun-Li Shen, Wei Chen, Lian-Zhou Chen, Qiao Su, Long-Juan Zhang, Jiong Bi, Wen-Tao Zeng, Wen Li, Ning Ma, Xiao-Hui Huang
Down-regulation of the miRNA miR-338-3p correlates with the invasive ability of hepatocellular carcinoma (HCC) cells. However, it is currently unclear whether down-regulation of miR-338-3p induces epithelial-mesenchymal transition (EMT), which may be the underlying mechanism governing HCC invasion. Here, we demonstrate that restoration of miR-338-3p expression via transfection of a miR-338-3p mimic reversed EMT and inhibited the motility and invasiveness of HCC cells. Conversely, silencing of endogenous miR-338-3p expression with a miR-338-3p-specific inhibitor induced EMT and enhanced HCC cell motility...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/29059385/snail1-transcription-factor-controls-telomere-transcription-and-integrity
#8
Rocco Mazzolini, Núria Gonzàlez, Andrea Garcia-Garijo, Alba Millanes-Romero, Sandra Peiró, Susan Smith, Antonio García de Herreros, Sílvia Canudas
Besides controlling epithelial-to-mesenchymal transition (EMT) and cell invasion, the Snail1 transcriptional factor also provides cells with cancer stem cell features. Since telomere maintenance is essential for stemness, we have examined the control of telomere integrity by Snail1. Fluorescence in situ hybridization (FISH) analysis indicates that Snail1-depleted mouse mesenchymal stem cells (MSC) have both a dramatic increase of telomere alterations and shorter telomeres. Remarkably, Snail1-deficient MSC present higher levels of both telomerase activity and the long non-coding RNA called telomeric repeat-containing RNA (TERRA), an RNA that controls telomere integrity...
October 20, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29032338/an-analysis-of-suppressing-migratory-effect-on-human-urinary-bladder-cancer-cell-line-by-silencing-of-snail-1
#9
Shima Salehi, Behzad Mansoori, Ali Mohammadi, Sadaf Davoudian, Seyed Mohammad Hossein Musavi Shenas, Neda Shajari, Jafar Majidi, Behzad Baradaran
BACKGROUND: Snail-1 actively participates in tumor progression, invasion, and migration. Targeting snail-1 expression can suppress the EMT process in cancer. The aim of this study was to investigate the effect of snail1 silencing on urinary bladder cancer. METHODS: Quantitative RT-PCR was used to detect snail-1 and other related metastatic genes expression following siRNA knockdown in urinary bladder cancer EJ-138 cells. The protein level of snail1 was assessed by Western blot...
October 12, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29029437/long-non-coding-rna-ube2cp3-promotes-tumor-metastasis-by-inducing-epithelial-mesenchymal-transition-in-hepatocellular-carcinoma
#10
Shun-Wang Cao, Jin-Lan Huang, Jing Chen, Yan-Wei Hu, Xiu-Mei Hu, Ting-Yu Ren, Shi-Hao Zheng, Jin-Duan Lin, Jing Tang, Lei Zheng, Qian Wang
Hepatocellular carcinoma (HCC) is a highly aggressive, solid malignancy that has a poor prognosis. Long non-coding RNAs (lncRNAs) have been found to be dysregulated in various cancers, including HCC. However, the molecular mechanism involving lncRNAs in HCC remains largely unknown. In this study, lncRNAs differentially expressed between HCC and corresponding non-cancerous tissue were identified by microarray analysis. A specific differentially expressed lncRNA UBE2CP3 (ubiquitin conjugating enzyme E2 C pseudogene 3) was identified...
September 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29017577/elevated-expression-of-par3-promotes-prostate-cancer-metastasis-by-forming-a-par3-apkc-kibra-complex-and-inactivating-the-hippo-pathway
#11
Pei-Jie Zhou, Wei Xue, Jinliang Peng, Yanqing Wang, Lianzi Wei, Ziqiang Yang, Helen He Zhu, Yu-Xiang Fang, Wei-Qiang Gao
BACKGROUND: Prostate cancer (PCa) is one of the most frequent tumors and leading cause of cancer deaths among males worldwide. The majority of deaths are due to recurrence and subsequent development of the metastatic cancer. Although loss or dislocalization of polarity proteins has been implicated in embryogenesis deficiency and tumorigenesis, association of polarity protein expression levels with tumor metastasis remains unclear. METHODS: Bioinformatics, qRT-PCR, western blot and immunohistochemical (IHC) analyses were used to examine expression of Par3, a key component of polarity-associated partitioning defective (PAR) complex, in primary and metastatic clinical PCa samples...
October 10, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/28977842/sirtuin-6-inhibits-epithelial-to-mesenchymal-transition-during-idiopathic-pulmonary-fibrosis-via-inactivating-tgf-%C3%AE-1-smad3-signaling
#12
Kunming Tian, Panpan Chen, Zhiping Liu, Shutian Si, Qian Zhang, Yong Mou, Lianyong Han, Qin Wang, Xue Zhou
Sirt6 which is implicated in the control of aging, cancer, and metabolism, has been shown to have anti-fibrosis function in heart and liver. However, whether Sirt6 inhibits idiopathic pulmonary fibrosis remains elusive. Epithelial to mesenchymal transition has been found to be involved in the pathogenesis of idiopathic pulmonary fibrosis. In the present study, forced expression of Sirt6 significantly abrogated TGF-β1-induced epithelial to mesenchymal transition-like phenotype and cell behaviors in A549 cells...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28955947/snail1-expression-in-human-colon-cancer-dld-1-cells-confers-invasive-properties-without-n-cadherin-expression
#13
Shoko Tanaka, Wakako Kobayashi, Misako Haraguchi, Kiyohide Ishihata, Norifumi Nakamura, Masayuki Ozawa
The epithelial-mesenchymal transition (EMT) is a fundamental characteristic of carcinoma cells. EMT is generally associated with a change in cellular morphology from cobblestone to spindle shape, reduced expression of epithelial markers such as E-cadherin, and enhanced expression of mesenchymal markers such as N-cadherin. This EMT-associated reciprocal expression of E-cadherin and N-cadherin has been called the "cadherin switch". Downregulation of E-cadherin enables cells to dissociate from colonies while upregulation of N-cadherin is associated with increased invasiveness...
December 2016: Biochemistry and Biophysics Reports
https://www.readbyqxmd.com/read/28947421/mesenchymal-stem-cells-promote-hepatocarcinogenesis-via-lncrna-muf-interaction-with-anxa2-and-mir-34a
#14
Xinlong Yan, Dongdong Zhang, Wei Wu, Shuheng Wu, Jingfeng Qian, Yajing Hao, Fang Yan, Pingping Zhu, Jiayi Wu, Guanling Huang, Yinghui Huang, Jianjun Luo, Xinhui Liu, Benyu Liu, Xiaomin Chen, Ying Du, Run-Sheng Chen, Zusen Fan
Accumulating evidence suggests that cancer-associated mesenchymal stem cells (MSC) contribute to the development and metastasis of hepatocellular carcinoma (HCC). Aberrant expression of long noncoding RNAs (lncRNA) has been associated with these processes but cellular mechanisms are obscure. In this study, we report that HCC-associated mesenchymal stem cells (HCC-MSC) promote epithelial-mesenchymal transition (EMT) and liver tumorigenesis. We identified a novel lncRNA that we termed lncRNA-MUF (MSC upregulated factor) that is highly expressed in HCC tissues and correlated with poor prognosis...
September 25, 2017: Cancer Research
https://www.readbyqxmd.com/read/28910558/horizontal-transfer-of-tamoxifen-resistance-in-mcf-7-cell-derivates-proteome-study
#15
S E Semina, A M Scherbakov, S V Kovalev, V E Shevchenko, M A Krasil'nikov
Using estrogen-dependent MCF-7 breast cancer cells and tamoxifen-resistant MCF-7/T subline we have shown that their co-cultivation lead to increase in tamoxifen resistance in the parent MCF-7 cells. The proteome analysis of MCF-7/T cells and new-generated resistant cells revealed 21 common proteins differently expressed in both the resistant cell lines, among them - 6 proteins were associated with the drug or hormonal resistance. Both resistant lines were characterized with suppression of estrogen receptor and activation of SNAIL1-signaling - mesenchymal pathway playing an important role in the down-regulation of estrogen receptor and maintaining of the estrogen-independent phenotype...
September 14, 2017: Cancer Investigation
https://www.readbyqxmd.com/read/28900220/diffusion-kurtosis-imaging-evaluating-epithelial-mesenchymal-transition-in-colorectal-carcinoma-xenografts-model-a-preliminary-study
#16
Huanhuan Liu, Wenbin Shen, Caiyuan Zhang, Yanfen Cui, Jinning Li, Tingting Zhang, Weibo Chen, Dengbin Wang
Epithelial-mesenchymal transition (EMT) plays an important role in aggravating invasiveness and metastatic behavior of colorectal cancer (CRC). Identification of EMT is important for structuring treatment strategy, but has not yet been studied by using noninvasive imaging modality. Diffusion kurtosis imaging (DKI) is an advanced diffusion weighted model that could reflect tissue microstructural changes in vivo. In this study, EMT was induced in CRC cells (HCT116) by overexpressing Snail1 gene. We aimed to investigate the value of DKI in identifying EMT in CRC and decipher the correlations between DKI-derived parameters and EMT biomarker E-cadherin and cell proliferative index Ki-67 expression...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28892081/a20-promotes-metastasis-of-aggressive-basal-like-breast-cancers-through-multi-monoubiquitylation-of%C3%A2-snail1
#17
Ji-Hyung Lee, Su Myung Jung, Kyung-Min Yang, Eunjin Bae, Sung Gwe Ahn, Jin Seok Park, Dongyeob Seo, Minbeom Kim, Jihoon Ha, Jaewon Lee, Jun-Hyeong Kim, Jun Hwan Kim, Akira Ooshima, Jinah Park, Donghyuk Shin, Youn Sook Lee, Sangho Lee, Geert van Loo, Joon Jeong, Seong-Jin Kim, Seok Hee Park
Although the ubiquitin-editing enzyme A20 is a key player in inflammation and autoimmunity, its role in cancer metastasis remains unknown. Here we show that A20 monoubiquitylates Snail1 at three lysine residues and thereby promotes metastasis of aggressive basal-like breast cancers. A20 is significantly upregulated in human basal-like breast cancers and its expression level is inversely correlated with metastasis-free patient survival. A20 facilitates TGF-β1-induced epithelial-mesenchymal transition (EMT) of breast cancer cells through multi-monoubiquitylation of Snail1...
October 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28890291/mir-122-inhibits-epithelial-mesenchymal-transition-in-hepatocellular-carcinoma-by-targeting-snail1-and-snail2-and-suppressing-wnt-%C3%AE-cadherin-signaling-pathway
#18
Yun Jin, Junfeng Wang, Jiang Han, Ding Luo, Zhiwei Sun
The downregulation of microRNA-122 (miR-122) had been reported to be associated with tumor invasion and metastasis in hepatocellular carcinoma (HCC). However, the underlying mechanisms of miR-122 involved in epithelial-mesenchymal transition (EMT) still need to be investigated. In the study, we demonstrated that miR-122 was significantly downregulated in HCC tissues compared with adjacent normal tissues. MiR-122 expression was closely correlated with tumor size, vascular invasion and American Joint Committee on Cancer (AJCC) stage of HCC patients...
November 15, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28883453/%C3%AE-catenin-twist-and-snail-transcriptional-regulation-of-emt-in-smokers-and-copd-and-relation-to-airflow-obstruction
#19
Malik Quasir Mahmood, Eugene Haydn Walters, Shakti D Shukla, Steve Weston, Hans Konrad Muller, Chris Ward, Sukhwinder Singh Sohal
COPD is characterised by poorly reversible airflow obstruction usually due to cigarette smoking. The transcription factor clusters of β-catenin/Snail1/Twist has been implicated in the process of epithelial mesenchymal transition (EMT), an intermediate between smoking and airway fibrosis, and indeed lung cancer. We have investigated expression of these transcription factors and their "cellular localization" in bronchoscopic airway biopsies from patients with COPD, and in smoking and non-smoking controls. An immune-histochemical study compared cellular protein expression of β-catenin, Snail1 and Twist, in these subject groups in 3 large airways compartment: epithelium (basal region), reticular basement membrane (Rbm) and underlying lamina propria (LP)...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28880281/a-right-handed-signalling-pathway-drives-heart-looping-in-vertebrates
#20
Oscar H Ocaña, Hakan Coskun, Carolina Minguillón, Prayag Murawala, Elly M Tanaka, Joan Galcerán, Ramón Muñoz-Chápuli, M Angela Nieto
Most animals show external bilateral symmetry, which hinders the observation of multiple internal left-right (L/R) asymmetries that are fundamental to organ packaging and function. In vertebrates, left identity is mediated by the left-specific Nodal-Pitx2 axis that is repressed on the right-hand side by the epithelial-mesenchymal transition (EMT) inducer Snail1 (refs 3, 4). Despite some existing evidence, it remains unclear whether an equivalent instructive pathway provides right-hand-specific information to the embryo...
September 6, 2017: Nature
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