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https://www.readbyqxmd.com/read/29097425/docosahexaenoic-acid-enhances-amphiregulin-mediated-bronchial-epithelial-cell-repair-processes-following-organic-dust-exposure
#1
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
#2
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
#3
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/28956162/development-of-an-in-vitro-model-to-study-uterine-functions-and-early-implantation-using-rat-uterine-explants
#4
Md Rashedul Islam, Yuko Ikeguchi, Kazuki Yamagami, Mohamed El-Sharawy, Nobuhiko Yamauchi
This study was conducted to develop an in vitro model using rat uterine explants to explore complex uterine functions. Rat uterine explants (1-2 mm) were isolated, cultured and further characterized. Steroid hormone treatment of cultured explants showed that both Muc1 and Pr were significantly up-regulated (P < 0.05) by E2. Areg was significantly up-regulated (P < 0.05) by P4 and Igfbp1 was significantly up-regulated (P < 0.05) by the combination of E2 and P4, although, in rat, Igfbp1 is E2-dependent...
September 27, 2017: Cell and Tissue Research
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
#5
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/28938404/the-transcriptome-of-estrogen-independent-mammary-growth-in-female-mice-reveals-that-not-all-mammary-glands-are-created-equally
#6
COMPARATIVE STUDY
Grace E Berryhill, Danielle G Lemay, Josephine F Trott, Lucila Aimo, Adam L Lock, Russell C Hovey
Allometric growth of ducts in the mammary glands (MGs) is widely held to be estrogen dependent. We previously discovered that the dietary fatty acid trans-10, cis-12 conjugated linoleic acid (CLA) stimulates estrogen-independent allometric growth and terminal end bud formation in ovariectomized mice. Given the similar phenotype induced by estrogen and CLA, we investigated the shared and/or divergent mechanisms underlying these changes. We confirmed MG growth induced by CLA is temporally distinct from that elicited by estrogen...
October 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28881271/factor-vii-activating-protease-fsap-regulates-the-expression-of-inflammatory-genes-in-vascular-smooth-muscle-and-endothelial-cells
#7
Kristina Byskov, Thomas Boettger, Paul F Ruehle, Nis Valentin Nielsen, Michael Etscheid, Sandip M Kanse
BACKGROUND AND AIMS: The factor VII activating protease (FSAP) knockout mice have a bigger neointima after vascular injury and a larger infarct volume after stroke. The Marburg I (MI) single nucleotide polymorphism (SNP) in the FSAP-encoding gene is associated with an increased risk of stroke and carotid stenosis in humans. We hypothesize that the regulation of gene expression by FSAP in vascular cells accounts for its vasculo-regulatory properties. METHODS: Vascular smooth muscle cells (VSMC) and endothelial cells (EC) were stimulated with FSAP and a microarray-based expression analysis was performed...
August 25, 2017: Atherosclerosis
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
#8
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/28741659/cover-image-volume-232-number-1-january-2017-page-i
#9
Areg Zingiryan, Nicholas H Farina, Kristiaan H Finstad, Janet L Stein, Jane B Lian, Gary S Stein
No abstract text is available yet for this article.
November 2017: Journal of Cellular Physiology
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
#10
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
#11
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/28697743/integrative-analysis-of-copy-number-and-gene-expression-in-breast-cancer-using-formalin-fixed-paraffin-embedded-core-biopsy-tissue-a-feasibility-study
#12
Mahesh Iddawela, Oscar Rueda, Jenny Eremin, Oleg Eremin, Jed Cowley, Helena M Earl, Carlos Caldas
BACKGROUND: An absence of reliable molecular markers has hampered individualised breast cancer treatments, and a major limitation for translational research is the lack of fresh tissue. There are, however, abundant banks of formalin-fixed paraffin-embedded (FFPE) tissue. This study evaluated two platforms available for the analysis of DNA copy number and gene expression using FFPE samples. METHODS: The cDNA-mediated annealing, selection, extension, and ligation assay (DASL™) has been developed for gene expression analysis and the Molecular Inversion Probes assay (Oncoscan™), were used for copy number analysis using FFPE tissues...
July 11, 2017: BMC Genomics
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
#13
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/28600504/amphiregulin-contained-in-nsclc-exosomes-induces-osteoclast-differentiation-through-the-activation-of-egfr-pathway
#14
Simona Taverna, Marzia Pucci, Marco Giallombardo, Maria Antonietta Di Bella, Mariacarmela Santarpia, Pablo Reclusa, Ignacio Gil-Bazo, Christian Rolfo, Riccardo Alessandro
Non-small cell lung cancer (NSCLC) remains the leading cause of cancer-related deaths worldwide. The majority of patients are diagnosed in advanced disease stage. Bone metastasis is the most frequent complication in NSCLC resulting in osteolytic lesions. The perfect balance between bone-resorbing osteoclasts and bone-forming osteoblasts activity is lost in bone metastasis, inducing osteoclastogenesis. In NSCLC, the epidermal growth factor receptor (EGFR) pathway is constitutively activated. EGFR binds Amphiregulin (AREG) that is overexpressed in several cancers such as colon, breast and lung...
June 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28593345/exocrine-gland-morphogenesis-insights-into-the-role-of-amphiregulin-from-development-to-disease
#15
REVIEW
Margherita Sisto, Loredana Lorusso, Giuseppe Ingravallo, Sabrina Lisi
Amphiregulin (AREG) is a well-characterized member of the epidermal growth factor (EGF) family and is one of the ligands of the EGF receptor (EGFR). AREG plays a key role in mammalian development and in the control of branching morphogenesis in various organs. Furthermore, AREG participates in a wide range of physiological and pathological processes activating the major intracellular signalling cascades governing cell survival, proliferation and motility. In this article, we review current advances in exocrine glands morphogenesis, focusing on the salivary gland, and discuss the essential aspects of AREG structure, function and regulation, and its differential role within the EGFR family of ligands...
June 7, 2017: Archivum Immunologiae et Therapiae Experimentalis
https://www.readbyqxmd.com/read/28520915/ovary-specific-depletion-of-the-nuclear-receptor-nr5a2-compromises-expansion-of-the-cumulus-oophorus-but-not-fertilization-by-intracytoplasmic-sperm-injection
#16
Kalyne Bertolin, Marie-Charlotte Meinsohn, João Suzuki, Jan Gossen, Kristina Schoonjans, Rajesha Duggavathi, Bruce D Murphy
The orphan nuclear receptor, liver receptor homolog-1 (aka Nuclear receptor subfamily 5, Group A, Member 2 (Nr5a2)), is widely expressed in mammalian tissues, and its ovarian expression is restricted to granulosa cells of activated follicles. We employed the floxed Nr5a2 (Nr5a2f/f) mutant mouse line and two granulosa-specific Cre lines, Anti-Müllerian hormone receptor- 2 (Amhr2Cre) and transgenic cytochrome P450 family 19 subfamily A polypeptide 1 (tgCyp19Cre), to develop two tissue- and time-specific Nr5a2 depletion models: Nr5a2Amhr2-/- and Nr5a2Cyp19-/-...
June 1, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28459431/mirna-34c-5p-inhibits-amphiregulin-induced-ovarian-cancer-stemness-and-drug-resistance-via-downregulation-of-the-areg-egfr-erk-pathway
#17
S-L Tung, W-C Huang, F-C Hsu, Z-P Yang, T-H Jang, J-W Chang, C-M Chuang, C-R Lai, L-H Wang
Epithelial ovarian cancer is the most lethal gynecological cancer mainly due to late diagnosis, easy spreading and rapid development of chemoresistance. Cancer stem cells are considered to be one of the main mechanisms for chemoresistance, as well as metastasis and recurrent disease. To explore the stemness characteristics of ovarian cancer stem cells, we successfully enriched ovarian cancer stem-like cells from an established ovarian cancer cell line (SKOV-I6) and a fresh ovarian tumor-derived cell line (OVS1)...
May 1, 2017: Oncogenesis
https://www.readbyqxmd.com/read/28455412/in-vivo-reprogramming-of-non-mammary-cells-to-an-epithelial-cell-fate-is-independent-of-amphiregulin-signaling
#18
Andrea L George, Corinne A Boulanger, Lisa H Anderson, Stéphanie Cagnet, Cathrin Brisken, Gilbert H Smith
Amphiregulin (AREG)(-/-) mice demonstrate impaired mammary development and form only rudimentary ductal epithelial trees; however, AREG(-/-) glands are still capable of undergoing alveologenesis and lactogenesis during pregnancy. Transplantation of AREG(-/-) mammary epithelial cells into cleared mouse mammary fat pads results in a diminished capacity for epithelial growth (∼15%) as compared to that of wild-type mammary epithelial cells. To determine whether estrogen receptor α (ERα, also known as ESR1) and/or AREG signaling were necessary for non-mammary cell redirection, we inoculated either ERα(-/-) or AREG(-/-) mammary cells with non-mammary progenitor cells (WAP-Cre/Rosa26LacZ+ male testicular cells or GFP-positive embryonic neuronal stem cells)...
June 15, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28450158/the-erbb-family-and-androgen-receptor-signaling-are-targets-of%C3%A2-celecoxib-in-prostate-cancer
#19
Antonella Brizzolara, Roberto Benelli, Roberta Venè, Paola Barboro, Alessandro Poggi, Francesca Tosetti, Nicoletta Ferrari
Inflammation plays a central role in prostate cancer (PCa) development through significant crosstalk between the COX-2-ErbB family receptor network and androgen receptor (AR)-EGFR signaling pathways. The purpose of this work was to determine the ability of the COX-2 inhibitor Celecoxib to modulate the EGFR-AR signaling pathway in androgen-dependent PCa cells and to provide a rationale for its beneficial use in chemopreventive strategies. Functional studies of Celecoxib activity were performed on LNCaP prostate cancer cells...
August 1, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28430338/yap-taz-and-areg-expression-in-eighth-cranial-nerve-schwannoma
#20
Alessandro Martini, Gino Marioni, Elisabetta Zanoletti, Rocco Cappellesso, Roberto Stramare, Elena Fasanaro, Chiara Faccioli, Luciano Giacomelli, Luca Denaro, Domenico D'Avella, Antonio Mazzoni, Ambrogio Fassina
BACKGROUND: Although the diagnosis and treatment of eighth cranial nerve (VIII CN) schwannoma (acoustic neuroma) has improved over the years, no factors capable of predicting tumor growth have been identified as yet. This study is a preliminary investigation of the expression in sporadic VIII CN schwannomas of Yes-associated protein (YAP), transcriptional coactivator with PDZ-binding motif (TAZ), and amphiregulin (AREG), a direct target gene of YAP and TAZ. The expression of YAP, TAZ and AREG was correlated with the volumetric dimensions of tumors on contrast-enhanced magnetic resonance imaging (ceMRI)...
July 24, 2017: International Journal of Biological Markers
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