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Epithelial growth factor receptor

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https://www.readbyqxmd.com/read/28644870/effects-of-nicotine-on-corneal-wound-healing-following-acute-alkali-burn
#1
Jong Won Kim, Chae Woong Lim, Bumseok Kim
Epidemiological studies have indicated that smoking is a pivotal risk factor for the progression of several chronic diseases. Nicotine, the addictive component of cigarettes, has powerful pathophysiological properties in the body. Although the effects of cigarette smoking on corneal re-epithelialization have been studied, the effects of nicotine on corneal wound healing-related neovascularization and fibrosis have not been fully demonstrated. The aim of this study was to evaluate the effects of chronic administration of nicotine on corneal wound healing following acute insult induced by an alkali burn...
2017: PloS One
https://www.readbyqxmd.com/read/28641303/microrna-122a-regulates-zonulin-by-targeting-egfr-in-intestinal-epithelial-dysfunction
#2
Bin Zhang, Yinghai Tian, Ping Jiang, Yanqiong Jiang, Chao Li, Ting Liu, Rujian Zhou, Ning Yang, Xinke Zhou, Zhihua Liu
BACKGROUND/AIMS: This study aimed to investigate the role of microRNA (miR)-122a in regulating zonulin during the modulation of intestinal barrier. METHODS: Zonulin proteins and their target gene expression were analyzed in miR-122a-overexpressing cell lines and in the target gene of epidermal growth factor receptor (EGFR). An mmu-miR-122a intestinal epithelial conditional transgenic (miR-122a-TG) mouse model was established to investigate EGFR and zonulin expression...
June 23, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28639899/tweak-fn14-signaling-in-tumors
#3
Guanglei Hu, Weihui Zeng, Yumin Xia
TWEAK (tumor necrosis factor-related weak inducer of apoptosis), a member of the tumor necrosis factor superfamily, acts on cells by binding to its only receptor named Fn14 (fibroblast growth factor-inducible 14). Their engagement activates a number of intracellular signal transduction cascades and consequently leads to cell death, proliferation, migration, or survival depending on the cellular contexts. Studies have indicated that the expression of TWEAK and Fn14 is upregulated in many solid tumors compared with healthy tissues...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28638929/-research-progress-of-neuregulin-4-biological-function
#4
Fan Yang, Xiao-Nan Li
Neuregulin 4 (NRG4) is a kind of protein containing epidermal growth factor (EGF)-like domains, mainly expressed and secreted by brown adipocytes. It specifically activates EGF receptor ErbB4 (v-erb-b2 avian erythroblastic leukemia viral oncogene homolog 4) to stimulate cell proliferation, inhibit apoptosis and improve energy metabolism of cells. Increasing evidence has shown that NRG4 plays an important role in epithelial cell-related diseases, cardiovascular diseases, tumors and glycolipid metabolic diseases, and therefore it could be a potential therapeutic target of some diseases...
June 25, 2017: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/28631245/hypoxia-and-inflammation-in-the-release-of-vegf-and-interleukins-from-human-retinal-pigment-epithelial-cells
#5
Olli Arjamaa, Vesa Aaltonen, Niina Piippo, Tamás Csont, Goran Petrovski, Kai Kaarniranta, Anu Kauppinen
PURPOSE: Retinal diseases are closely associated with both decreased oxygenation and increased inflammation. It is not known if hypoxia-induced vascular endothelial growth factor (VEGF) expression in the retina itself evokes inflammation, or whether inflammation is a prerequisite for the development of neovascularization. METHODS: Human ARPE-19 cell line and primary human retinal pigment epithelium (RPE) cells were used. ARPE-19 cells were kept either under normoxic (24 h or 48 h) or hypoxic conditions (1% O2, 24 h)...
June 19, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28629179/epidermal-growth-factor-enhances-cellular-uptake-of-polystyrene-nanoparticles-by-clathrin-mediated-endocytosis
#6
Le Thi Minh Phuc, Akiyoshi Taniguchi
The interaction between nanoparticles and cells has been studied extensively, but most research has focused on the effect of various nanoparticle characteristics, such as size, morphology, and surface charge, on the cellular uptake of nanoparticles. In contrast, there have been very few studies to assess the influence of cellular factors, such as growth factor responses, on the cellular uptake efficiency of nanoparticles. The aim of this study was to clarify the effects of epidermal growth factor (EGF) on the uptake efficiency of polystyrene nanoparticles (PS NPs) by A431 cells, a human carcinoma epithelial cell line...
June 19, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28628612/novel-interplay-between-jnk-and-egfr-signaling-in-drosophila-dorsal-closure
#7
Tatyana Kushnir, Sharon Mezuman, Shaked Bar-Cohen, Rotem Lange, Ze'ev Paroush, Aharon Helman
Dorsal closure (DC) is a developmental process in which two contralateral epithelial sheets migrate to seal a large hole in the dorsal ectoderm of the Drosophila embryo. Two signaling pathways act sequentially to orchestrate this dynamic morphogenetic process. First, c-Jun N-terminal kinase (JNK) signaling activity in the dorsal-most leading edge (LE) cells of the epidermis induces expression of decapentaplegic (dpp). Second, Dpp, a secreted TGF-β homolog, triggers cell shape changes in the adjacent, ventrally located lateral epidermis, that guide the morphogenetic movements and cell migration mandatory for DC...
June 19, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28627623/p18-peptide-a-functional-fragment-of-pigment-epithelial-derived-factor-inhibits-angiogenesis-in-hepatocellular-carcinoma-via-modulating-vegf-vegfr2-signalling-pathway
#8
Xin Wang, Peng Xiu, Fuhai Wang, Jingtao Zhong, Honglong Wei, Zongzhen Xu, Feng Liu, Jie Li
The P18 peptide is a functional fragment of pigment epithelial-derived factor (PEDF), which is an endogenic angiogenesis inhibitor. This study sought to determine the anti-angiogenic bioactivity of the P18 peptide in hepato-cellular carcinoma (HCC) and to elucidate the underlying mechanism. Xenograft tumour growth assays demonstrated the P18 peptide suppressed angiogenesis of HCC in vivo. Wound healing, Transwell and Matrigel-culture assays indicated that the P18 peptide inhibited the cell migration and tube formation of endothelial cells (ECs) in vitro...
June 14, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28626027/selective-activation-of-epidermal-growth-factor-receptor-in-renal-proximal-tubule-induces-tubulointerstitial-fibrosis
#9
Jessica M Overstreet, Yinqiu Wang, Xin Wang, Aolei Niu, Leslie S Gewin, Bing Yao, Raymond C Harris, Ming-Zhi Zhang
Epidermal growth factor receptor (EGFR) has been implicated in the pathogenesis of diabetic nephropathy and renal fibrosis; however, the causative role of sustained EGFR activation is unclear. Here, we generated a novel kidney fibrotic mouse model of persistent EGFR activation by selectively expressing the EGFR ligand, human heparin-binding EGF-like growth factor (HB-EGF), in renal proximal tubule epithelium. Human HB-EGF expression increased tyrosine kinase phosphorylation of EGFR and the subsequent activation of downstream signaling pathways, including ERK and AKT, as well as the profibrotic TGF-β1/SMAD pathway...
June 16, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28625142/proteotoxic-stress-desensitizes-tgf-beta-signaling-through-receptor-downregulation-in-retinal-pigment-epithelial-cells
#10
X Tan, C Chen, Y Zhu, J Deng, X Qiu, S Huang, F Shang, B Cheng, Y Liu
BACKGROUND: Transforming growth factor (TGFβ)-induced epithelial-mesenchymal transition (EMT) and proteotoxic stress are two main contributors of intraocular fibrotic disorders, including proliferative vitreoretinopathy (PVR) and proliferative diabetic retinopathy (PDR). However, how these two factors communicate with each other is not well-characterized. OBJECTIVE: The aim was to investigate the regulatory role of proteotoxic stress on TGFβ signaling in retinal pigment epithelium...
June 19, 2017: Current Molecular Medicine
https://www.readbyqxmd.com/read/28624806/targeting-the-tumor-promoting-microenvironment-in-met-amplified-nsclc-cells-with-a-novel-inhibitor-of-pro-hgf-activation
#11
Benjamin Y Owusu, Shantasia Thomas, Phanindra Venukadasula, Zhenfu Han, James W Janetka, Robert A Galemmo, Lidija Klampfer
Targeted therapeutic agents, such as inhibitors of epithelial growth factor receptor (EGFR), have transformed the management of non-small cell lung cancer (NSCLC) patients. MET-amplified NSCLC cells display resistance to EGFR-targeting agents, but are addicted to MET signaling for survival and proliferation and are sensitive to MET inhibition. However, responsive cancer cells invariably develop resistance to MET-targeted treatment.The tumor microenvironment plays a major role in resistance to anticancer therapy...
May 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28622685/increased-pdgfr-beta-and-vegfr-2-protein-levels-are-associated-with-resistance-to-platinum-based-chemotherapy-and-adverse-outcome-of-ovarian-cancer-patients
#12
Stefanie Avril, Yasemin Dincer, Katharina Malinowsky, Claudia Wolff, Sibylle Gündisch, Alexander Hapfelmeier, Melanie Boxberg, Holger Bronger, Karl-Friedrich Becker, Barbara Schmalfeldt
Despite frequent initial response rates of epithelial ovarian cancer to platinum-based chemotherapy the majority of patients develop drug resistance. Our aim was to evaluate differential expression of signaling-pathway proteins in platinum-sensitive versus platinum-resistant primary epithelial ovarian cancer specimens to identify predictive biomarkers for treatment response.192 patients were studied comprising of independent training (n = 89) and validation (n = 103) cohorts. Full-length proteins were extracted from paraffin-embedded samples including multiple regions per tumor to account for intratumoral heterogeneity...
June 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28621668/blocking-epithelial-to-mesenchymal-transition-in-glioblastoma-with-a-sextet-of-repurposed-drugs-the-eis-regimen
#13
Richard E Kast, Nicolas Skuli, Georg Karpel-Massler, Guido Frosina, Timothy Ryken, Marc-Eric Halatsch
This paper outlines a treatment protocol to run alongside of standard current treatment of glioblastoma- resection, temozolomide and radiation. The epithelial to mesenchymal transition (EMT) inhibiting sextet, EIS Regimen, uses the ancillary attributes of six older medicines to impede EMT during glioblastoma. EMT is an actively motile, therapy-resisting, low proliferation, transient state that is an integral feature of cancers' lethality generally and of glioblastoma specifically. It is believed to be during the EMT state that glioblastoma's centrifugal migration occurs...
June 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28621227/expression-of-epithelial-mesenchymal-transition-driver-brachyury-and-status-of-tumor-infiltrating-cd8-and-foxp3-lymphocytes-in-predicting-treatment-responses-to-neoadjuvant-chemotherapy-of-breast-cancer
#14
Kwan Ho Lee, Eun Young Kim, Yong Lai Park, Sung-Im Do, Seoung Wan Chae, Chan Heun Park
Brachyury has been characterized as a driver of epithelial-mesenchymal transition process which is regarded as an important mechanism of cancer cell invasion and metastatic progression. The status of tumor-infiltrating lymphocytes has been proposed to predict response to neoadjuvant chemotherapy in breast cancer. We investigated the clinical significance and value of tumor-infiltrating lymphocytes and brachyury as biomarkers to predict treatment responses to neoadjuvant chemotherapy in breast cancer. We also examined the correlation of the Neo-Bioscore with tumor-infiltrating lymphocytes and brachyury to indirectly predict long-term outcome...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28618253/hypoxia-inducible-factor-1%C3%AE-signaling-promotes-repair-of-the-alveolar-epithelium-after-acute-lung-injury
#15
Jazalle McClendon, Nicole L Jansing, Elizabeth F Redente, Aneta Gandjeva, Yoko Ito, Sean P Colgan, Aftab Ahmad, David W H Riches, Harold A Chapman, Robert J Mason, Rubin M Tuder, Rachel L Zemans
During acute respiratory distress syndrome, epithelial cells, primarily alveolar type (AT) I cells, die and slough off the basement membrane, resulting in enhanced permeability. ATII cells proliferate and spread onto the denuded basement membrane to reseal the barrier. Repair of the alveolar epithelium is critical for clinical recovery; however, the mechanisms underlying ATII cell proliferation and spreading are not well understood. We hypothesized that hypoxia-inducible factor (HIF)1α promotes proliferation and spreading of ATII cells during repair after lung injury...
June 12, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28615638/pharmacodynamic-and-pharmacokinetic-assessment-of-pulmonary-rehabilitation-mixture-for-the-treatment-of-pulmonary-fibrosis
#16
Juanjuan Zhao, Yan Ren, Yubei Qu, Wanglin Jiang, Changjun Lv
Pulmonary rehabilitation mixture (PRM), a Chinese herbal medicine formula, has been used to treat pulmonary fibrosis for decades. In this study, we systematically evaluated the pharmacodynamic and pharmacokinetic performance of PRM. The pharmacodynamic results showed that PRM could improve the condition of CoCl2-stimulated human type II alveolar epithelial cells, human pulmonary microvascular endothelial cells, human lung fibroblasts and pulmonary fibrosis rats induced by bleomycin, PRM treatment reduced the expression of platelet-derived growth factor, fibroblast growth factor, toll-like receptor 4, high-mobility group box protein 1 and hypoxia-inducible factor 1α...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28614297/multilineage-communication-regulates-human-liver-bud-development-from-pluripotency
#17
J Gray Camp, Keisuke Sekine, Tobias Gerber, Henry Loeffler-Wirth, Hans Binder, Malgorzata Gac, Sabina Kanton, Jorge Kageyama, Georg Damm, Daniel Seehofer, Lenka Belicova, Marc Bickle, Rico Barsacchi, Ryo Okuda, Emi Yoshizawa, Masaki Kimura, Hiroaki Ayabe, Hideki Taniguchi, Takanori Takebe, Barbara Treutlein
Conventional two-dimensional differentiation from pluripotency fails to recapitulate cell interactions occurring during organogenesis. Three-dimensional organoids generate complex organ-like tissues; however, it is unclear how heterotypic interactions affect lineage identity. Here we use single-cell RNA sequencing to reconstruct hepatocyte-like lineage progression from pluripotency in two-dimensional culture. We then derive three-dimensional liver bud organoids by reconstituting hepatic, stromal, and endothelial interactions, and deconstruct heterogeneity during liver bud development...
June 14, 2017: Nature
https://www.readbyqxmd.com/read/28614116/parathyroid-hormone-and-the-regulation-of-renal-tubular-calcium-transport
#18
Benjamin Ko
PURPOSE OF REVIEW: Renal tubule excretion of calcium is carefully and complexly regulated. At the center of this process, parathyroid hormone (PTH) is the chief regulator of renal calcium reabsorption. This review outlines our current understanding of PTH's effects on renal tubular calcium transport, focusing on the more recent discoveries beyond its direct regulation of epithelial Ca channel transient receptor potential vanilloid 5 (TRPV5) and looking at its interaction with sodium transport and the hormones fibroblast growth factor 23 (FGF23) and klotho...
June 12, 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/28608476/pro-migratory-and-tgf-%C3%AE-activating-functions-of-%C3%AE-v%C3%AE-6-integrin-in-pancreatic-cancer-are-differentially-regulated-via-an-eps8-dependent-gtpase-switch
#19
Jo Tod, Christopher J Hanley, Mark R Morgan, Marta Rucka, Toby Mellows, Maria-Antoinette Lopez, Philip Kiely, Karwan A Moutasim, Steven J Frampton, Durgagauri Sabnis, David R Fine, Colin Johnson, John F Marshall, Giorgio Scita, Veronika Jenei, Gareth J Thomas
The integrin αvβ6 is upregulated in numerous carcinomas, where expression commonly correlates with poor prognosis. αvβ6 promotes tumour invasion, partly through regulation of proteases and cell migration, and is also the principal mechanism by which epithelial cells activate TGF-β1; this latter function complicates therapeutic targeting of αvβ6, since TGF-β1 has both tumour-promoting and -suppressive effects. It is unclear how these different αvβ6 functions are linked; both require actin cytoskeletal reorganisation, and it is suggested that tractive forces generated during cell migration activate TGF-β1 by exerting mechanical tension on the ECM-bound latent complex...
June 13, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28607007/synergistic-activity-with-notch-inhibition-and-androgen-ablation-in-erg-positive-prostate-cancer-cells
#20
Ahmed A Mohamed, Shyh-Han Tan, Charles P Xavier, Shilpa Katta, Wei Huang, Lakshmi Ravindranath, Muhammad Jamal, Hua Li, Meera Srivastava, Eri S Srivatsan, Taduru L Sreenath, David G McLeod, Alagarsamy Srinivasan, Gyorgy Petrovics, Albert Dobi, Shiv Srivastava
The oncogenic activation of the ETS related gene (ERG) due to gene fusions is present in over half of prostate cancer (CaP) in Western countries. Due to its high incidence and oncogenic role, ERG and components of ERG network have emerged as potential drug targets for CaP. Utilizing gene expression datasets, from matched normal and prostate tumor epithelial cells, an association of NOTCH transcription factors with ERG expression status was identified; confirming that NOTCH factors are direct transcriptional targets of ERG...
June 12, 2017: Molecular Cancer Research: MCR
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