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Amphiregulin

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https://www.readbyqxmd.com/read/29116018/tissue-specific-role-of-rhbdf2-in-cutaneous-wound-healing-and-hyperproliferative-skin-disease
#1
Vishnu Hosur, Bonnie L Lyons, Lisa M Burzenski, Leonard D Shultz
OBJECTIVE: Gain-of-function (GOF) mutations in RHBDF2 cause tylosis. Patients present with hyperproliferative skin, and keratinocytes from tylosis patients' skin show an enhanced wound-healing phenotype. The curly bare mouse model of tylosis, carrying a GOF mutation in the Rhbdf2 gene (Rhbdf2 (cub) ), presents with epidermal hyperplasia and shows accelerated cutaneous wound-healing phenotype through enhanced secretion of the epidermal growth factor receptor family ligand amphiregulin...
November 7, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29112457/fosl1-promotes-kras-induced-lung-cancer-through-amphiregulin-and-cell-survival-gene-regulation
#2
Indira M Elangovan, Michelle Vaz, Chandramohan R Tamatam, Haranatha R Potteti, Narsa M Reddy, Sekhar P Reddy
RATIONALE: FOSL1/AP-1 transcription factor regulates gene expression controlling various pathophysiological processes. It is a major effector of RAS-ERK1/2 signaling and activated in human lung epithelia by tumorigenic stimuli. Recent evidence shows an inverse correlation between FOSL1 expression and the survival of lung cancer patients with adenocarcinomas; however its role in lung tumorigenesis remains elusive. OBJECTIVES: To determine the role of FOSL1 in Kras-induced lung adenocarcinoma in vivo, and its downstream effector mechanisms...
November 7, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/29097425/docosahexaenoic-acid-enhances-amphiregulin-mediated-bronchial-epithelial-cell-repair-processes-following-organic-dust-exposure
#3
Tara M Nordgren, Art J Heires, Kristina L Bailey, Dawn M Katafiasz, Myron L Toews, Christopher S Wichman, Debra J Romberger
Injurious dust exposures in the agricultural workplace involve the release of inflammatory mediators and activation of epidermal growth factor receptor (EGFR) in the respiratory epithelium. Amphiregulin, an EGFR ligand, mediates tissue repair and wound healing in the lung epithelium. Omega-3 fatty acids such as docosahexaenoic acid (DHA) are also known modulators of repair and resolution of inflammatory injury. This study investigated how AREG, DHA and EGFR modulate lung repair processes following dust-induced injury...
November 2, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29091309/epiregulin-ereg-is-upregulated-through-an-il-1%C3%AE-autocrine-loop-in-caco-2-epithelial-cells-with-reduced-cftr-function
#4
Macarena Massip-Copiz, Mariángeles Clauzure, Ángel G Valdivieso, Tomás A Santa-Coloma
CFTR is a cAMP-regulated chloride channel, whose mutations produce cystic fibrosis. The impairment of CFTR activity increases the intracellular Cl(-) concentration, which in turn produces an increased interleukin-1β (IL-1β) secretion. The secreted IL-1β then induces an autocrine positive feedback loop, further stimulating IL-1β priming and secretion. Since IL-1β can transactivate the epidermal growth factor receptor (EGFR), we study here the levels of expression for different EGFR ligands in Caco-2/pRS26 cells (expressing shRNA against CFTR resulting in a reduced CFTR expression and activity)...
November 1, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29075780/association-of-tumor-her3-messenger-rna-expression-with-panitumumab-efficacy-in-advanced-colorectal-cancer
#5
Jenny F Seligmann, Ace J Hatch, Susan D Richman, Faye Elliott, Bart Jacobs, Sarah Brown, Herbert Hurwitz, Jennifer H Barrett, Philip Quirke, Andrew B Nixon, Matthew T Seymour
Importance: Epidermal growth factor receptor (EGFR) (HER1) signaling depends on ligand binding and dimerization with itself or other HER receptors. We previously showed in a randomized trial that high EGFR ligand expression is predictive of panitumumab benefit in advanced colorectal cancer. Tumor expression of HER3 may further refine the RAS wild-type (wt) population benefitting from anti-EGFR agents. Objective: To examine HER3 messenger RNA expression as a prognostic and predictive biomarker for anti-EGFR therapy in a randomized clinical trial of panitumumab...
October 26, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/29069643/-repair-treg-cells-in-tissue-injury
#6
Chaoqi Zhang, Lifeng Li, Kexin Feng, Daoyang Fan, Wenhua Xue, Jingli Lu
Studies in mice and humans have elucidated an important role for Tregs in promoting tissue repair and restoring tissue integrity. Emerging evidence has revealed that Tregs promoted wound healing and repair processes at multiple tissue sites, such as the heart, liver, kidney, muscle, lung, bone and central nervous system. The localization of repair Tregs in the lung, muscle and liver exhibited unique phenotypes and functions. Epidermal growth factor receptor, amphiregulin, CD73/CD39 and keratinocyte growth factor are important repair factors that are produced or expressed by repair Tregs; these factors coordinate with parenchymal cells to limit injury and promote repair...
October 25, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29046031/-innate-lymphoid-cells-and-their-role-in-immune-response-regulation
#7
Bibiana Patricia Ruiz-Sánchez, David Cruz-Zárate, Iris Estrada-García, Isabel Wong-Baeza
Innate lymphoid cells (ILCs) are lymphocytes lacking antigen recognition receptors and become activated in response to cytokines and through microbe-associated molecular pattern (MAMP) receptors. ILCs are found mainly in mucosal tissues and participate in the immune response against infections and in chronic inflammatory conditions. ILCs are divided in ILC-1, ILC-2 and ILC-3, and these cells have analogue functions to those of immune adaptive response lymphocytes Th1, Th2 and Th17. ILC-1 express T-bet, produce IFNγ, protect against infections with intracellular microorganisms and are related to inflammatory bowel disease immunopathology...
July 2017: Revista Alergia Mexico: Organo Oficial de la Sociedad Mexicana de Alergia e Inmunología, A.C
https://www.readbyqxmd.com/read/29045902/epidermal-growth-factor-receptor-expression-licenses-type-2-helper-t-cells-to-function-in-a-t-cell-receptor-independent-fashion
#8
Carlos M Minutti, Sebastian Drube, Natalie Blair, Christian Schwartz, Jame C McCrae, Andrew N McKenzie, Thomas Kamradt, Michal Mokry, Paul J Coffer, Maria Sibilia, Alice J Sijts, Padraic G Fallon, Rick M Maizels, Dietmar M Zaiss
Gastro-intestinal helminth infections trigger the release of interleukin-33 (IL-33), which induces type-2 helper T cells (Th2 cells) at the site of infection to produce IL-13, thereby contributing to host resistance in a T cell receptor (TCR)-independent manner. Here, we show that, as a prerequisite for IL-33-induced IL-13 secretion, Th2 cells required the expression of the epidermal growth factor receptor (EGFR) and of its ligand, amphiregulin, for the formation of a signaling complex between T1/ST2 (the IL-33R) and EGFR...
October 17, 2017: Immunity
https://www.readbyqxmd.com/read/29038367/a-nonimmune-function-of-t-cells-in-promoting-lung-tumor-progression
#9
Jesse A Green, Nicholas Arpaia, Michail Schizas, Anton Dobrin, Alexander Y Rudensky
The involvement of effector T cells and regulatory T (T reg) cells in opposing and promoting solid organ carcinogenesis, respectively, is viewed as a shifting balance between a breach versus establishment of tolerance to tumor or self-antigens. We considered that tumor-associated T cells might promote malignancy via distinct mechanisms used by T cells in nonlymphoid organs to assist in their maintenance upon injury or stress. Recent studies suggest that T reg cells can participate in tissue repair in a manner separable from their immunosuppressive capacity...
October 16, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29038366/specifically-differentiated-t-cell-subset-promotes-tumor-immunity-over-fatal-immunity
#10
Abdulraouf Ramadan, Brad Griesenauer, Djamilatou Adom, Reuben Kapur, Helmut Hanenberg, Chen Liu, Mark H Kaplan, Sophie Paczesny
Allogeneic immune cells, particularly T cells in donor grafts, recognize and eliminate leukemic cells via graft-versus-leukemia (GVL) reactivity, and transfer of these cells is often used for high-risk hematological malignancies, including acute myeloid leukemia. Unfortunately, these cells also attack host normal tissues through the often fatal graft-versus-host disease (GVHD). Full separation of GVL activity from GVHD has yet to be achieved. Here, we show that, in mice and humans, a population of interleukin-9 (IL-9)-producing T cells activated via the ST2-IL-33 pathway (T9IL-33 cells) increases GVL while decreasing GVHD through two opposing mechanisms: protection from fatal immunity by amphiregulin expression and augmentation of antileukemic activity compared with T9, T1, and unmanipulated T cells through CD8α expression...
October 16, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28938744/an-improved-ivm-method-for-cumulus-oocyte-complexes-from-small-follicles-in-polycystic-ovary-syndrome-patients-enhances-oocyte-competence-and-embryo-yield
#11
F Sánchez, F Lolicato, S Romero, M De Vos, H Van Ranst, G Verheyen, E Anckaert, J E J Smitz
STUDY QUESTION: Are meiotic and developmental competence of human oocytes from small (2-8 mm) antral follicles improved by applying an optimized IVM method involving a prematuration step in presence of C-Type Natriuretic Peptide (CNP) followed by a maturation step in presence of FSH and Amphiregulin (AREG)? SUMMARY ANSWER: A strategy involving prematuration culture (PMC) in the presence of CNP followed by IVM using FSH + AREG increases oocyte maturation potential leading to a higher availability of Day 3 embryos and good-quality blastocysts for single embryo transfer...
October 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28894207/positive-feedback-of-the-amphiregulin-egfr-erk-pathway-mediates-pm2-5-from-wood-smoke-induced-muc5ac-expression-in-epithelial-cells
#12
Lingmei Huang, Jinding Pu, Fang He, Baoling Liao, Binwei Hao, Wei Hong, Xiuqin Ye, Jinglong Chen, Jun Zhao, Sha Liu, Juan Xu, Bing Li, Pixin Ran
Biomass fuel smoke is thought to contribute to chronic obstructive pulmonary disease, which is characterized by mucous cell metaplasia and enhanced mucus secretion. We investigated the effect of particulate matter (PM) with a diameter <2.5 μm (PM2.5) from wood smoke (WSPM2.5) on the expression of the most prominent secreted mucin, MUC5AC. Wood smoke was able to induce MUC5AC expression in the rat respiratory tract after 3 months of exposure. WSPM2.5 could induce MUC5AC production in both primary human airway epithelial cells and the NCI-H292 cell line...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28859905/atrazine-suppresses-fsh-induced-steroidogenesis-and-lh-dependent-expression-of-ovulatory-genes-through-pde-camp-signaling-pathway-in-human-cumulus-granulosa-cells
#13
Kristina Pogrmic-Majkic, Dragana Samardzija, Natasa Stojkov-Mimic, Jelena Vukosavljevic, Aleksandra Trninic-Pjevic, Vesna Kopitovic, Nebojsa Andric
Atrazine (ATR) alters female reproductive functions in different animal species. Here, we analyzed whether ATR disturbs steroidogenic and ovulatory processes in hormone-stimulated human cumulus granulosa cells and mechanism of its action. Results showed that treatment of human cumulus granulosa cells with 20 μM ATR for 48 h resulted in lower FSH-stimulated estradiol and progesterone production. ATR reduced mRNA levels of aromatase (CYP19A1), steroidogenic acute regulatory protein (STAR) and luteinizing hormone/choriogonadotropin receptor (LHCGR)...
August 28, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28733611/integrin-%C3%AE-6%C3%AE-4-upregulates-amphiregulin-and-epiregulin-through-base-excision-repair-mediated-dna-demethylation-and-promotes-genome-wide-dna-hypomethylation
#14
Brittany L Carpenter, Jinpeng Liu, Lei Qi, Chi Wang, Kathleen L O'Connor
Aberrant DNA methylation patterns are a common theme across all cancer types. Specific DNA demethylation of regulatory sequences can result in upregulation of genes that are critical for tumor development and progression. Integrin α6β4 is highly expressed in pancreatic carcinoma and contributes to cancer progression, in part, through the specific DNA demethylation and upregulation of epidermal growth factor receptor (EGFR) ligands amphiregulin (AREG) and epiregulin (EREG). Whole genome bisulfite sequencing (WGBS) revealed that integrin α6β4 signaling promotes an overall hypomethylated state and site specific DNA demethylation of enhancer elements within the proximal promoters of AREG and EREG...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28723928/erbb-activation-signatures-as-potential-biomarkers-for-anti-erbb3-treatment-in-hnscc
#15
Diego Alvarado, Gwenda F Ligon, Jay S Lillquist, Scott B Seibel, Gerald Wallweber, Veronique M Neumeister, David L Rimm, Gerald McMahon, Theresa M LaVallee
Head and neck squamous cell carcinoma (HNSCC) accounts for 3-5% of all tumor types and remains an unmet medical need with only two targeted therapies approved to date. ErbB3 (HER3), the kinase-impaired member of the EGFR/ErbB family, has been implicated as a disease driver in a number of solid tumors, including a subset of HNSCC. Here we show that the molecular components required for ErbB3 activation, including its ligand neuregulin-1 (NRG1), are highly prevalent in HNSCC and that HER2, but not EGFR, is the major activating ErbB3 kinase partner...
2017: PloS One
https://www.readbyqxmd.com/read/28714000/circulating-levels-of-angiogenesis-related-growth-factors-in-breast-cancer-a-study-to-profile-proteins-responsible-for-tubule-formation
#16
Gemma A Barron, Marie Goua, Klaus W J Wahle, Giovanna Bermano
The present study exploited a versatile in vitro endothelial cell/fibroblast co-culture cell system to investigate the association between angiogenesis and breast cancer by comparing the capacity of plasma from women with breast cancer and age-matched controls, to influence tubule formation and modulate angiogenesis in vitro, and to identify plasma circulating factors which might be responsible. Plasma from women with breast cancer (n=8) (added on day 7 after co-culture establishment) significantly increased tubule formation by 57% (P<0...
September 2017: Oncology Reports
https://www.readbyqxmd.com/read/28695963/differential-regulation-of-cumulus-cell-transcription-during-oocyte-maturation-in-vivo-and-in-vitro
#17
Giovanni Coticchio, Libby Ophir, Yuval Yung, Micha Baum, Mariabeatrice Dal Canto, Mario Mignini-Renzini, Fausta Brambillasca, Rubens Fadini, Ariel Hourvitz
Differences in cumulus cell gene expression after oocyte maturation in vitro (IVM) or in vivo have been described in previous studies. However, the possible impact of follicle stage on gene expression deregulation during human oocyte IVM remains unknown. Expression of selected genes of interest was compared in cumulus cell of three classes of human cumulus cell-oocyte complexes (COCs): a) COCs derived from human chorionic gonadotropin (hCG)-triggered IVM cycles, collected at the germinal vesicle (GV) stage from mid-sized follicles (4-12 mm) and matured in vitro (IVM-GV); b) COCs derived from hCG-triggered IVM cycles, collected from mid-sized follicles (4-12 mm) and matured in vivo (IVM-MII); c) COCs derived from controlled ovarian stimulation in vitro fertilization (IVF) cycles, collected from large/preovulatory follicles and matured in vivo (IVF-MII)...
2017: International Journal of Developmental Biology
https://www.readbyqxmd.com/read/28666102/corrigendum-to-amphiregulin-enhances-vegf-a-production-in-human-chondrosarcoma-cells-and-promotes-angiogenesis-by-inhibiting-mir-206-via-fak-c-src-pkc%C3%AE-pathway-cancer-lett-385-28%C3%A2-jan-2017-261-270
#18
Chao-Qun Wang, Yu-Wen Huang, Shih-Wei Wang, Yuan-Li Huang, Chun-Hao Tsai, Yong-Ming Zhao, Bi-Fei Huang, Guo-Hong Xu, Yi-Chin Fong, Chih-Hsin Tang
No abstract text is available yet for this article.
September 28, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28655741/genetic-deletion-of-amphiregulin-restores-the-normal-skin-phenotype-in-a-mouse-model-of-the-human-skin-disease-tylosis
#19
Vishnu Hosur, Benjamin E Low, Leonard D Shultz, Michael V Wiles
In humans, gain-of-function (GOF) mutations in RHBDF2 cause the skin disease tylosis. We generated a mouse model of human tylosis and show that GOF mutations in RHBDF2 cause tylosis by enhancing the amount of amphiregulin (AREG) secretion. Furthermore, we show that genetic disruption of AREG ameliorates skin pathology in mice carrying the human tylosis disease mutation. Collectively, our data suggest that RHBDF2 plays a critical role in regulating EGFR signaling and its downstream events, including development of tylosis, by facilitating enhanced secretion of AREG...
August 15, 2017: Biology Open
https://www.readbyqxmd.com/read/28620115/amphiregulin-is-not-required-for-mammary-fate-reprogramming
#20
(no author information available yet)
No abstract text is available yet for this article.
June 15, 2017: Journal of Cell Science
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