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Epithelial to mesenchymal transition lung

Yanyan Liao, Weiyi Wang, Xiaomei Huang, Yongyan Sun, Shen Tian, Peng Cai
Graphene and its derivatives have exhibited wide potential applications in electronics, structural engineering and medicine. However, over utilization and untreated discharge may cause its distribution into environmental as well as biological chain, which raised the concerns of potential health risk as a potential hazard. Accumulating evidence has demonstrated that graphene derivatives induce lung fibrosis in vivo, so overall goal of this study was to explore the molecular mechanisms underlying the pulmonary fibrotic responses of reduced graphene oxide (rGO), using in vitro assays...
October 12, 2018: Scientific Reports
Jinhua Liu, Bingyu Huang, Zihan Xiu, Zhiyuan Zhou, Jiao Liu, Xiangyong Li, Xudong Tang
Background: Our previous studies have demonstrated that human papillomaviruse (HPV)-16 oncoproteins promoted epithelial-mesenchymal transition (EMT), leading to non-small cell lung cancer (NSCLC) progression, but the underlying molecular mechanisms still remain unclear. PI3K/Akt/HIF-1α signaling pathway has been reported to mediate hypoxia-induced EMT. In this study, we further explored the role of PI3K/Akt/HIF-1α signaling pathway in HPV-16 oncoprotein-induced EMT in NSCLC cells. Methods: A549 and NCI-H460 NSCLC cells were transiently transfected with pEGFP-HPV-16 E6 or E7 constructs...
2018: Journal of Cancer
Hong Zhang, Shimin Pei, Bin Zhou, Huanan Wang, Hongchao Du, Di Zhang, Degui Lin
Canine mammary tumor (CMT) has always been an ideal animal model for human breast cancer (HBC) research, however, there is a lack of various established CMT cell lines corresponding to HBC cell lines. This study was designed to establish a new type of CMT cell line. The primary tumor, CMT-7364, was identified as the intraductal papillary carcinoma, and showed negative immunoreactivity to estrogen receptors (ER), progesterone receptors (PR), and human epidermal growth factor receptor-2 (HER-2) by immunohistochemistry (IHC) analysis...
October 2018: Tissue & Cell
Seulki Kim, Tae Min Kim, Dong-Wan Kim, Soyeon Kim, Miso Kim, Yong-Oon Ahn, Bhumsuk Keam, Dae Seog Heo
Purpose: Amplified mesenchymal-epithelial transition factor, MET, is a receptor tyrosine kinase (RTK) that has been considered a druggable target in non-small cell lung cancer (NSCLC). Although multiple MET tyrosine kinase inhibitors (TKIs) are being actively developed for MET-driven NSCLC, the mechanisms of acquired resistance to MET-TKIs have not been well elucidated. To understand the mechanisms of resistance and establish therapeutic strategies, we developed an in vitro model using the MET-amplified NSCLC cell line EBC-1...
October 10, 2018: Cancer Research and Treatment: Official Journal of Korean Cancer Association
Jinhua Lu, Yazhen Zhong, Jian Chen, Xianlei Lin, Zechen Lin, Nan Wang, Shengyou Lin
BACKGROUND/AIMS: Radiotherapy plays a critical role in lung cancer treatment. Radiation can activate transforming growth factor-β (TGF-β) signaling and induce the epithelial-mesenchymal transition (EMT), which may lead to distant metastases. MicroRNAs (miRNAs) have been suggested to affect radiotherapy in lung cancer. METHODS: miRNA Next-Generation Sequencing was performed to investigate the effects of irradiation on the miRNA profile of lung cancer A549 cells...
October 11, 2018: Cellular Physiology and Biochemistry
Yuwen He, Hui Xie, Pengjiu Yu, Shunjun Jiang, Li Wei
PURPOSE: Platinum-based drugs, particularly cisplatin (DDP), are used in the treatment of non-small cell lung cancer (NSCLC). However, development of drug resistance remains the major therapeutic barrier in NSCLC. METHODS: The potential cisplatin resistance-related genes were identified from the global transcriptomes of cisplatin-resistant A549/DDP cells using microarray analysis. Gain- and loss-of-function assays were performed to analyze the effects of Forkhead Box Protein C2 (FOXC2) on the in vitro and in vivo sensitivity of NSCLC cells to cisplatin and its possible molecular mechanisms...
October 9, 2018: Cancer Chemotherapy and Pharmacology
Michael A Gordon, Beatrice Babbs, Dawn R Cochrane, Benjamin Bitler, Jennifer K Richer
BACKGROUND: Ovarian cancer metastasizes via direct seeding, whereby cancer cells shed from the primary site, resist cell death in the peritoneal cavity, then metastasize to peritoneal organs. We sought to identify molecular mechanisms that facilitate ovarian cancer cell anchorage independent survival. METHODS: Gene expression profiling was performed on ovarian cancer cells grown in attached or forced suspension culture and confirmed by RT-qPCR. Anoikis was measured by Caspase 3/7 assay...
October 8, 2018: Molecular Carcinogenesis
Soo-Jin Park, Dong-Soon Im
Sphingosine 1-phosphate (S1P) levels are often found to be elevated in serum, bronchoalveolar lavage, and lung tissue of idiopathic pulmonary fibrosis patients and experimental mouse models. Although the roles of sphingosine kinase 1 and S1P receptors have been implicated in fibrosis, the underlying mechanism of fibrosis via Sphingosine 1-phosphate receptor 2 (S1P2 ) has not been fully investigated. Therefore, in this study, the roles of S1P2 in lung inflammation and fibrosis was investigated by means of a bleomycin-induced lung fibrosis model and lung epithelial cells...
October 4, 2018: Biomolecules & Therapeutics
Akiko Takahashi, Masahiro Seike, Mika Chiba, Satoshi Takahashi, Shinji Nakamichi, Masaru Matsumoto, Susumu Takeuchi, Yuji Minegishi, Rintaro Noro, Shinobu Kunugi, Kaoru Kubota, Akihiko Gemma
Overcoming acquired resistance to epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs) is critical in combating EGFR-mutant non-small cell lung cancer (NSCLC). We tried to construct a novel therapeutic strategy to conquer the resistance to second-and third-generation EGFR-TKIs in EGFR-positive NSCLC patients. We established afatinib- and osimertinib-resistant lung adenocarcinoma cell lines. Exome sequencing, cDNA array and miRNA microarray were performed using the established cell lines to discover novel therapeutic targets associated with the resistance to second-and third-generation EGFR-TKIs...
October 5, 2018: Scientific Reports
Chungyoul Choe, Hyewon Kim, Sol Min, Sangkyu Park, Jeongmin Seo, Sangho Roh
Background: Non-small cell lung cancer (NSCLC) is difficult to treat successfully. This intractability is mainly due to the cancer progressing through invasion, metastasis, chemotherapeutic resistance and relapse. Stemness has been linked to the various steps of cancer progression in a variety of tumors, yet little is known regarding its role in NSCLC. Purpose: In this study, we sought to determine the role of SOX2, a master regulator of pluripotency, in the growth of extracellular matrix (ECM)-detached cells during cancer progression...
2018: OncoTargets and Therapy
Gan Cao, Dehu Chen, Guiyuan Liu, Yan Pan, Qinghong Liu
Background: Cytoplasmic polyadenylation element-binding protein 4 (CPEB4) has previously been reported to be associated with biological malignancy in various cancers. However, its function in tumor growth and metastasis in gastric cancer (GC) remains obscure. Here, we explored the functional and molecular mechanisms by which CPEB4 influences GC. Materials and methods: The expression of CPEB4 was assessed using Western blot and immunohistochemistry in GC specimens...
2018: OncoTargets and Therapy
Varisa Pongrakhananon, Onsurang Wattanathamsan, Masatoshi Takeichi, Paninee Chetprayoon, Pithi Chanvorachote
Epithelial-to-mesenchymal transition (EMT) plays pivotal roles in a variety of biological processes, including cancer invasion. EMT involves alterations of cytoskeletal proteins, including microtubules. The role of microtubules in EMT, however, is not fully understood. Microtubule dynamics are regulated by microtubule-binding proteins, and one such protein is CAMSAP3, which binds the minus-end of microtubules. Here, we show that CAMSAP3 is important to preserve the epithelial phenotypes in lung carcinoma cells...
October 3, 2018: Journal of Cell Science
Zhikui Liu, Yufeng Wang, Changwei Dou, Meng Xu, Liankang Sun, Liang Wang, Bowen Yao, Qing Li, Wei Yang, Kangsheng Tu, Qingguang Liu
Rational: Patients with hepatocellular carcinoma (HCC) have a poor prognosis mostly due to intrahepatic as well as distal metastasis. Vasodilator-stimulated phosphoprotein (VASP), a regulator of actin cytoskeleton and cell migration, is overexpressed in HCC and correlated with its malignant features and poor prognosis. Very little is known about its function in HCC. Methods: qRT-PCR, Western blot and IHC were used to detect the VASP expression in tissues and cells. Transwell and wound healing assays were used to measure the migration and invasion of HCC cells...
2018: Theranostics
Elena Bargagli, Maria Di Masi, Marco Perruzza, Lucia Vietri, Laura Bergantini, Elena Torricelli, Giulia Biadene, Giovanni Fontana, Federico Lavorini
Idiopathic pulmonary fibrosis is a peripheral subpleural interstitial lung disorder limited to the lung not involving the airways. It has a poor prognosis (survival less than 5 years) and commonly an interstitial pneumonia radiological pattern. Patients complain of a chronic dry cough in 80% of cases. A cough is often the first symptom of this rare disease, preceding dyspnea by years, and is associated with a poor prognosis, high dyspnea scores and low FVC percentages. The pathogenetic mechanisms leading to coughing in IPF are unclear...
September 29, 2018: Internal and Emergency Medicine
Lan Thi Hanh Phi, Yoseph Toni Wijaya, Ita Novita Sari, Ying-Gui Yang, Yun Kyung Lee, Hyog Young Kwon
Ginsenoside Rb2, a saponin from Panax ginseng, has been shown to have many functions. However, the effect of ginsenoside Rb2 on the metastasis of colorectal cancer (CRC) remains unknown. CRC cell lines HT29 and SW620 were used to determine the effects of ginsenoside Rb2 on the colony-forming, migration, invasion, and wound-healing abilities of CRC cells in vitro. Further, ginsenoside Rb2 was given intraperitoneally at 5 mg/kg of mouse body weight to check its effect on the metastasis of CRC cells in vivo. Ginsenoside Rb2 decreased colony-forming ability, migration, invasion, and wound healing of CRC cells in vitro, although it did not affect cell proliferation...
September 27, 2018: Cancer Medicine
Jianyu Wang, Tiejun Zhou, Zhiwei Sun, Ting Ye, Shixia Zhou, Jingyuan Li, Yongli Liu, Liangsheng Kong, Junlin Tang, Doudou Liu, H Rosie Xing
Symmetric cell division (SD) and asymmetric cell division (ASD) were the unique characteristics of stem cells and the mechanisms underlying stem cell renewal. While recent studies have identified the presence of SD and ASD in lung cancer stem cells (CSCs), the mechanisms regulating SD and ASD in cancer state have not been elucidated, mostly due to the lack of stable cellular models of SD and ASD in CSC research. In this study, the interaction between Zeb1, an Epithelial-Mesenchymal Transition (EMT) factor shown to regulate CSCs self-renew, and Numb, which regulates SD and ASD in the normal neural stem cell was investigated using the stable mouse Lewis lung adenocarcinoma SD (LLC-SD) and ASD (LLC-ASD) lines established from our previous study...
2018: International Journal of Biological Sciences
Minoru Terashima, Akihiko Ishimura, Sasithorn Wanna-Udom, Takeshi Suzuki
Long noncoding RNAs (lncRNAs) are important regulatory molecules in various biological and pathological processes, including cancer development. We have previously shown that the MEG3 lncRNA plays an essential role in transforming growth factor-β (TGF-β)-induced epithelial-mesenchymal transition (EMT) of human lung cancer cells. In this study, we investigated the function of another lncRNA, MEG8, which shares the DLK1-DIO3 locus with MEG3, in the regulation of EMT. MEG8 lncRNA expression was immediately induced during TGF-β-mediated EMT of A549 and LC2/ad lung cancer and Panc1 pancreatic cancer cell lines...
September 27, 2018: Journal of Biological Chemistry
Rongying Zhu, Xiaodong Yang, Xiang Xue, Mingjing Shen, Feng Chen, Xiaodong Chen, Ying Tsai, Peter C Keng, Yongbing Chen, Soo Ok Lee, Yuhchyau Chen
Radiation treatment induces neuroendocrine differentiation (NED) in non-small cell lung cancer (NSCLC) A549 and H157 cells, so higher NE-like features in radioresistant A549 (A549R26-1) and H157 (H157R24-1) cells are observed than in parental cells. We detected higher NED marker expressions in A549R26-1 cell-derived tumors than in A549 cell-derived tumors. In mechanism studies, we found that NED induction in A549R26-1 and H157R24-1 cells was accompanied by increased intracellular cAMP and IL-6 levels. Treatment of radioresistant lung cancer cells with the inhibitor (SQ22536) of adenylate cyclase (AC) which is the enzyme responsible for the cAMP production, or the neutralizing antibody (Ab) of IL-6, resulted in decreased NE-like features in radioresistant lung cancer cells...
September 15, 2018: Biochimica et biophysica acta. Molecular cell research
Longqiang Wang, Xin Tong, Zhengyu Zhou, Shengjie Wang, Zhe Lei, Tianze Zhang, Zeyi Liu, Yuanyuan Zeng, Chang Li, Jun Zhao, Zhiyue Su, Cuijuan Zhang, Xia Liu, Guangquan Xu, Hong-Tao Zhang
BACKGROUND: TGF-β promotes tumor invasion and metastasis through inducing epithelial-mesenchymal transition (EMT) in non-small cell lung cancer (NSCLC). Circular RNAs (circRNAs) are recognized as functional non-coding RNAs involved in human cancers. However, whether and how circRNAs contribute to TGF-β-induced EMT and metastasis in NSCLC remain vague. Here, we investigated the regulation and function of Circular RNA hsa_circ_0008305 (circPTK2) in TGF-β-induced EMT and tumor metastasis, as well as a link between circPTK2 and transcriptional intermediary factor 1 γ (TIF1γ) in NSCLC...
September 27, 2018: Molecular Cancer
Xudong Peng, Guangyi Liu, Hongxia Peng, Anqi Chen, Lang Zha, Ziwei Wang
SOX4 is highly expressed in gastric cancer (GC) and is associated with tumor grade, metastasis and prognosis, however the mechanism is not clear. We report herein that SOX4 was upregulated and overexpression of SOX4 was associated with increased expression of the markers of Epithelial-mesenchymal transition (EMT) and stemness in clinic patient samples. In vitro, overexpression of SOX4 promoted the invasion as showed by Transwell assay and stemness of GC cells as assessed by sphere formation assay, which was suppressed by silencing SOX4 with shRNA...
March 2018: Genes & Diseases
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