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pancreatic cancer EMT

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https://www.readbyqxmd.com/read/28723647/set-contributes-to-the-epithelial-mesenchymal-transition-of-pancreatic-cancer
#1
Hardik R Mody, Sau Wai Hung, Kineta Naidu, Haesung Lee, Caitlin A Gilbert, Toan Thanh Hoang, Rakesh K Pathak, Radhika Manoharan, Shanmugam Muruganandan, Rajgopal Govindarajan
Pancreatic cancer has a devastating prognosis due to 80-90% of diagnostic cases occurring when metastasis has already presented. Activation of the epithelial-mesenchymal transition (EMT) is a prerequisite for metastasis because it allows for the dissemination of tumor cells to blood stream and secondary organs. Here, we sought to determine the role of SET oncoprotein, an endogenous inhibitor of PP2A, in EMT and pancreatic tumor progression. Among the two major isoforms of SET (isoform 1 and isoform 2), higher protein levels of SET isoform 2 were identified in aggressive pancreatic cancer cell lines...
July 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28719220/egfr-targeted-cationic-polymeric-mixed-micelles-for-co-delivery-of-gemcitabine-and-mir-205-for-treating-advanced-pancreatic-cancer
#2
Goutam Mondal, Saud Almawash, Amit Kumar Chaudhary, Ram I Mahato
Gemcitabine (GEM), a first-line chemotherapy for pancreatic cancer undergoes rapid metabolism and develops chemoresistance after repeated administration. We previously demonstrated that the combination of GEM and miR-205 provides an effective therapeutic strategy to sensitize GEM-resistant pancreatic cancer cells. Since epidermal growth factor receptor (EGFR) is overexpressed in pancreatic cancer cells, in this study, we aimed to deliver mixed micelles containing GEM and miR-205 decorated with EGFR-targeting cetuximab (C225) monoclonal antibody for targeted therapy...
July 18, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28711919/silencing-igfbp-2-decreases-pancreatic-cancer-metastasis-and-enhances-chemotherapeutic-sensitivity
#3
Huan Liu, Le Li, Hua Chen, Rui Kong, Shangha Pan, Jisheng Hu, Yongwei Wang, Yilong Li, Bei Sun
Pancreatic cancer has remained one of the most devastating and lethal malignancies characterized by local invasion, distant metastasis and a high degree of chemoresistance. Insulin-like growth factor binding protein 2 (IGFBP-2) is a member of the IGFBP family of proteins, and it is highly expressed in pancreatic cancer patients' serum and tumor tissues. IGFBP-2 also mediates tumor cell growth, invasion and resistance, while the mechanisms remain unclear. In this study, we sought to determine the impact of IGFBP-2 expression on pancreatic cancer tumorigenesis and metastasis in vitro and in vivo...
June 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28703793/linc-dync2h1-4-promotes-emt-and-csc-phenotypes-by-acting-as-a-sponge-of-mir-145-in-pancreatic-cancer-cells
#4
Yuran Gao, Zhicheng Zhang, Kai Li, Liying Gong, Qingzhu Yang, Xuemei Huang, Chengcheng Hong, Mingfeng Ding, Huanjie Yang
The acquisition of epithelial-mesenchymal transition (EMT) and/or existence of a sub-population of cancer stem-like cells (CSC) are associated with malignant behavior and chemoresistance. To identify which factor could promote EMT and CSC formation and uncover the mechanistic role of such factor is important for novel and targeted therapies. In the present study, we found that the long intergenic non-coding RNA linc-DYNC2H1-4 was upregulated in pancreatic cancer cell line BxPC-3-Gem with acquired gemcitabine resistance...
July 13, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28697764/long-non-coding-rna-linc00673-regulated-non-small-cell-lung-cancer-proliferation-migration-invasion-and-epithelial-mesenchymal-transition-by-sponging-mir-150-5p
#5
Wei Lu, Honghe Zhang, Yuequn Niu, Yongfeng Wu, Wenjie Sun, Hongyi Li, Jianlu Kong, Kefeng Ding, Han-Ming Shen, Han Wu, Dajing Xia, Yihua Wu
BACKGROUND: The function of a new long non-coding RNA linc00673 remains unclear. While identified as an oncogenic player in non-small cell lung cancer (NSCLC), linc00673 was found to be anti-oncogenic in pancreatic ductal adenocarcinoma (PDAC). However whether linc00673 regulated malignancy and epithelial mesenchymal transition (EMT) has not been characterized. METHODS: Cell proliferation was assessed using CCK-8 and EdU assays, and cell migration and invasion were assessed using scratch assays and transwell invasion assays...
July 11, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28685847/microrna-300-promotes-apoptosis-and-inhibits-proliferation-migration-invasion-and-epithelial-mesenchymal-transition-via-the-wnt-%C3%AE-catenin-signaling-pathway-by-targeting-cul4b-in-pancreatic-cancer-cells
#6
Jia-Qiang Zhang, Shi Chen, Jiang-Ning Gu, Yi Zhu, Qian Zhan, Dong-Feng Cheng, Hao Chen, Xia-Xing Deng, Bai-Yong Shen, Cheng-Hong Peng
The study aims to verify the hypothesis that up-regulation of microRNA-300 (miR-300) targeting CUL4B promotes apoptosis and suppresses proliferation, migration, invasion, and epithelial-mesenchymal transition (EMT) of pancreatic cancer cells by regulating the Wnt/β-catenin signaling pathway. Pancreatic cancer tissues and adjacent tissues were collected from 110 pancreatic cancer patients. Expression of miR-300, CUL4B, Wnt, β-catenin, E-cadherin, N-cadherin, Snail, GSK-3β, and CyclinD1 were detected using qRT-PCR and Western blot...
July 7, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28682339/upholding-a-role-for-emt-in-pancreatic-cancer-metastasis
#7
Nicole M Aiello, Thomas Brabletz, Yibin Kang, M Angela Nieto, Robert A Weinberg, Ben Z Stanger
No abstract text is available yet for this article.
July 5, 2017: Nature
https://www.readbyqxmd.com/read/28671675/matrix-stiffness-induces-epithelial-mesenchymal-transition-and-promotes-chemoresistance-in-pancreatic-cancer-cells
#8
A J Rice, E Cortes, D Lachowski, B C H Cheung, S A Karim, J P Morton, A Del Río Hernández
Increased matrix rigidity associated with the fibrotic reaction is documented to stimulate intracellular signalling pathways that promote cancer cell survival and tumour growth. Pancreatic cancer is one of the stiffest of all human solid carcinomas and is characterised by a remarkable desmoplastic reaction. Here we use mouse models, genetically engineered to recapitulate human pancreatic cancer, and several pancreatic cancer cell lines as a model to investigate the effect of matrix stiffness in epithelial-mesenchymal transition (EMT) and resistance to chemotherapeutics...
July 3, 2017: Oncogenesis
https://www.readbyqxmd.com/read/28638102/mir-509-5p-and-mir-1243-increase-the-sensitivity-to-gemcitabine-by-inhibiting-epithelial-mesenchymal-transition-in-pancreatic-cancer
#9
Hidekazu Hiramoto, Tomoki Muramatsu, Daisuke Ichikawa, Kousuke Tanimoto, Satoru Yasukawa, Eigo Otsuji, Johji Inazawa
The epithelial-mesenchymal transition (EMT) contributes to various processes in cancer progression, such as metastasis and drug resistance. Since we have already established a cell-based reporter system for identifying EMT-suppressive microRNAs (miRNAs) in the pancreatic cancer cell line Panc1, we performed a function-based screening assay by combining this reporter system and a miRNA library composed of 1,090 miRNAs. As a result, we identified miR-509-5p and miR-1243 as EMT-suppressive miRNAs, although the mechanisms for EMT-suppression induced by these miRNAs have yet to be clarified...
June 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28617552/long-non-coding-rna-tug1-can-promote-proliferation-and-migration-of-pancreatic-cancer-via-emt-pathway
#10
C-F Qin, F-L Zhao
OBJECTIVE: This paper aimed to investigate the effect of long non-coding RNA TUG1 (lncRNA TUG1) on cell proliferation, as well as cell migration in pancreatic cancer. PATIENTS AND METHODS: The mRNA levels of Taurine-up-regulated gene 1 (TUG1) in three kinds of pancreatic cancer cells BxPC3, PaTu8988 and SW1990 was detected by RT-qPCR. Meantime, RT-qPCR was used to examine the mRNA levels of TUG1 in 20 cases of human pancreatic cancer tissues and its para-carcinoma tissues...
May 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28602912/synthetic-8-hydroxydeoxyguanosine-inhibited-metastasis-of-pancreatic-cancer-through-concerted-inhibitions-of-erm-and-rho-gtpase
#11
Jong-Min Park, Young-Min Han, Migyeong Jeong, Myung Hee Chung, Chang Il Kwon, Kwang Hyun Ko, Ki Baik Hahm
8-hydroxydeoxyguanosine (8-OHdG) is generated consequent to oxidative stress, but its paradoxical anti-oxidative, anti-inflammatory, and anti-mutagenic effects via Rho-GTPase inhibition were noted in various models of inflammation and cancer. Metastasis occurs through cell detachment, epithelial-mesenchymal transition (EMT), and cell migration; during these processes, changes in cell morphology are initiated through Rho-GTPase-dependent actin cytoskeleton polymerization. In this study, we explored the anti-metastatic mechanisms of 8-OHdG in Panc-1 pancreatic cancer cells...
June 8, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28599404/neoadjuvant-chemotherapy-for-pancreatic-cancer-effects-on-cancer-tissue-and-novel-perspectives
#12
Hidehiro Tajima, Isamu Makino, Yoshinao Ohbatake, Shinichi Nakanuma, Hironori Hayashi, Hisatoshi Nakagawara, Tomoharu Miyashita, Hiroyuki Takamura, Tetsuo Ohta
Chemotherapy for pancreatic cancer has diversified following the addition of more treatment regimens; however, in spite of this, pancreatic cancer remains a fatal disease. Preoperative (neoadjuvant) chemotherapy (NAC) or neoadjuvant chemoradiation therapy (NACRT) has been developed and implemented. For patients with borderline resectable pancreatic cancer (BRPC) and locally advanced pancreatic cancer (LAPC), a number of clinical trials have been conducted; NACRT was demonstrated to improve resectability, R0 resection rate, overall survival rate, disease-free survival rate and even an LAPC and BRPC survival advantage over NAC...
June 2017: Oncology Letters
https://www.readbyqxmd.com/read/28599281/hif-2%C3%AE-promotes-the-formation-of-vasculogenic-mimicry-in-pancreatic-cancer-by-regulating-the-binding-of-twist1-to-the-ve-cadherin-promoter
#13
Jian Yang, Dong-Ming Zhu, Xiao-Gang Zhou, Ni Yin, Yi Zhang, Zi-Xiang Zhang, De-Chun Li, Jian Zhou
Vasculogenic mimicry (VM) is a blood supply modality that occurs independently of endothelial cell angiogenesis. Hypoxia and the epithelial-mesenchymal transition (EMT) induce VM formation by remodeling the extracellular matrix. Our previous study demonstrated that hypoxia-inducible factor-2 alpha (HIF-2α) promotes the progress of EMT in pancreatic cancer; however, whether HIF-2α promotes VM formation in pancreatic cancer remains unknown. In this study, we investigated HIF-2α expression and VM by immunohistochemistry in 70 pancreatic cancer patients as well as the role of Twist1and Twist2 in HIF-2α-induced VM in vitro and in vivo...
May 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28586066/microrna-148a-suppresses-epithelial-mesenchymal-transition-and-invasion-of-pancreatic-cancer-cells-by-targeting-wnt10b-and-inhibiting-the-wnt-%C3%AE-catenin-signaling-pathway
#14
Long Peng, Zhanying Liu, Jian Xiao, Yi Tu, Zhen Wan, Haiwei Xiong, Yong Li, Weidong Xiao
Epithelial-mesenchymal transition (EMT) plays a critical role in the process of cancer invasion and metastasis. The Wnt/β-catenin signaling pathway is known as a stimulative factor, which may trigger EMT and metastasis of cancer cells. In addition, several microRNAs (miRNAs) have been proven to regulate the EMT process. Recent research revealed that miR‑148a is downregulated in pancreatic cancer. However, the definite role of miR-148a in EMT and invasion of pancreatic cancer is still unknown. The present study attempted to demonstrate the underlying mechanism of miR-148a in the regulation of EMT and invasion of pancreatic cancer cells...
June 6, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28579826/inflammation-and-epithelial-mesenchymal-transition-in-pancreatic-ductal-adenocarcinoma-fighting-against-multiple-opponents
#15
REVIEW
Farid G Khalafalla, Mohammad W Khan
Pancreatic ductal adenocarcinoma (PDAC) is the most common type of pancreatic cancer and one of the most lethal human cancers. Inflammation is a critical component in PDAC initiation and progression. Inflammation also contributes to the aggressiveness of PDAC indirectly via induction of epithelial-mesenchymal transition (EMT), altogether leading to enhanced resistance to chemotherapy and poor survival rates. This review gives an overview of the key pro-inflammatory signaling pathways involved in PDAC pathogenesis and discusses the role of inflammation in induction of EMT and development of chemoresistance in patients with PDAC...
2017: Cancer Growth and Metastasis
https://www.readbyqxmd.com/read/28538690/dysregulation-of-mirna-expression-in-cancer-associated-fibroblasts-cafs-and-its-consequences-on-the-tumor-microenvironment
#16
REVIEW
Maren Schoepp, Anda Jana Ströse, Jörg Haier
The tumor microenvironment, including cancer-associated fibroblasts (CAF), has developed as an important target for understanding tumor progression, clinical prognosis and treatment responses of cancer. Cancer cells appear to transform normal fibroblasts (NF) into CAFs involving direct cell-cell communication and epigenetic regulations. This review summarizes the current understanding on miR involvement in cancer cell-tumor environment/stroma communication, transformation of NFs into CAFs, their involved targets and signaling pathways in these interactions; and clinical relevance of CAF-related miR expression profiles...
May 24, 2017: Cancers
https://www.readbyqxmd.com/read/28536008/chemosensitization-and-inhibition-of-pancreatic-cancer-stem-cell%C3%A2-proliferation-by-overexpression-of-microrna-205
#17
Amit Kumar Chaudhary, Goutam Mondal, Virender Kumar, Krishna Kattel, Ram I Mahato
Treatment of pancreatic cancer with gemcitabine (GEM) is limited due to its rapid plasma metabolism and development of chemoresistance. MicroRNA (miRNA) regulates cancer stem cell (CSC) maintenance and induces chemoresistance in cancer cells. In this study, we observed differential downregulation of miR-205 (miR-205-5p) in human pancreatic cancer tissues and cells. Compared to GEM-sensitive MIA PaCa-2 cells, miR-205 was highly downregulated in GEM-resistant MIA PaCa-2R cells. Lentivirus-mediated overexpression of miR-205 inhibits MIA PaCa-2R cell proliferation after GEM-treatment...
May 20, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28524160/stroma-regulated-hmga2-is-an-independent-prognostic-marker-in-pdac-and-aac
#18
Carina Strell, Karin Jessica Norberg, Artur Mezheyeuski, Jonas Schnittert, Praneeth R Kuninty, Carlos Fernández Moro, Janna Paulsson, Nicolai Aagaard Schultz, Dan Calatayud, Johannes Matthias Löhr, Oliver Frings, Caroline Sophie Verbeke, Rainer Lothar Heuchel, Jai Prakash, Julia Sidenius Johansen, Arne Östman
BACKGROUND: The HMGA2 protein has experimentally been linked to EMT and cancer stemness. Recent studies imply that tumour-stroma interactions regulate these features and thereby contribute to tumour aggressiveness. METHODS: We analysed 253 cases of pancreatic ductal adenocarcinoma (PDAC) and 155 cases of ampullary adenocarcinoma (AAC) for HMGA2 expression by IHC. The data were correlated with stroma abundance and supplemented by experimental studies. RESULTS: HMGA2 acts as an independent prognostic marker associated with a significantly shorter overall survival in both tumour types...
June 27, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28518134/asic1-and-asic3-contribute-to-acidity-induced-emt-of-pancreatic-cancer-through-activating-ca-2-rhoa-pathway
#19
Shuai Zhu, Hai-Yun Zhou, Shi-Chang Deng, Shi-Jiang Deng, Chi He, Xiang Li, Jing-Yuan Chen, Yan Jin, Zhuang-Li Hu, Fang Wang, Chun-You Wang, Gang Zhao
Extracellular acid can have important effects on cancer cells. Acid-sensing ion channels (ASICs), which emerged as key receptors for extracellular acidic pH, are differently expressed during various diseases and have been implicated in underlying pathogenesis. This study reports that ASIC1 and ASIC3 are mainly expressed on membrane of pancreatic cancer cells and upregulated in pancreatic cancer tissues. ASIC1 and ASIC3 are responsible for an acidity-induced inward current, which is required for elevation of intracellular Ca(2+) concentration ([Ca(2+)]i)...
May 18, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28506766/effects-of-microrna-183-on-epithelial-mesenchymal-transition-proliferation-migration-invasion-and-apoptosis-in-human-pancreatic-cancer-sw1900-cells-by-targeting-mta1
#20
Xizhou Lin, Liang Zheng, Hongliang Song, Jun Xiao, Bujian Pan, Haichuan Chen, Xiaodan Jin, Haibo Yu
OBJECTIVE: This study aims to explore effects of miR-183 on epithelial-mesenchymal transition (EMT) and invasion by targeting MTA1 in human pancreatic cancer (PC) cells. METHODS: Totally, 108 PC patients admitted in Wenzhou Central Hospital and Wenzhou People's Hospital, The Dingli Clinical Institute of Wenzhou Medical University from March 2010 to March 2014 were enrolled. qRT-PCR and immunohistochemistry were applied to examine expression of MTA1 mRNA and protein...
May 12, 2017: Experimental and Molecular Pathology
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