Integrin Signaling Revisited
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Neuropeptide Y1 Receptor Antagonist but Not Neuropeptide Y Itself Increased Bone Mineral Density When Locally Injected with Hyaluronic Acid in Male Wistar Rats
Turkish Journal of Medical Sciences Turk J Med Sci (2020) 50: 1454-1460 http://journals.tubitak.gov.tr/medical/ © TÜBİTAK Research Article doi:10.3906/sag-2001-268 Neuropeptide Y1 receptor antagonist but not neuropeptide Y itself increased bone mineral density when locally injected with hyaluronic acid in male Wistar rats 1, 2 3 Muhammer Özgür ÇEVİK *, Petek KORKUSUZ , Feza KORKUSUZ 1 Department of Medical Genetics, Faculty of Medicine, Adıyaman University, Adıyaman, Turkey 2 Department of Histology and Embryology, Faculty of Medicine, Hacettepe University, Ankara, Turkey 3 Department of Sports Medicine, Faculty of Medicine, Hacettepe University, Ankara, Turkey Received: 31.01.2020 Accepted/Published Online: 19.05.2020 Final Version: 26.08.2020 Background/aim: The nervous system controls bone mass via both the central (CNS) and the peripheral (PNS) nervous systems. Intriguingly, neuropeptide Y (NPY) signaling occurs in both. Less is known on how the PNS stimulated NPY signaling controls bone metabolism. The objective of this study was to evaluate whether NPY or NPY1 receptor antagonist changes local bone mineral density (BMD) when injected into a Wistar rat tibia. Materials and methods: Tibial intramedullary area of 24 wild type male Wistar rats (average weight = 350 ± 50 g, average age = 4 ± 0.5 months) were injected with NPY (1 × 10-5 M and 1 × 10-6 M) and NPY1 receptor antagonist (1 × 10-4 M) dissolved in hyaluronic acid (HA) separately. Tibiae were collected after one and two weeks. BMD was measured with dual-energy X-ray absorptiometry (DXA) and micro quantitative computer tomography (QCT). Histological changes were analyzed with light microscopy, Goldner's Masson trichrome (MT), and hematoxylin-eosin staining. -
Epha Receptors and Ephrin-A Ligands Are Upregulated by Monocytic
Mukai et al. BMC Cell Biology (2017) 18:28 DOI 10.1186/s12860-017-0144-x RESEARCHARTICLE Open Access EphA receptors and ephrin-A ligands are upregulated by monocytic differentiation/ maturation and promote cell adhesion and protrusion formation in HL60 monocytes Midori Mukai, Norihiko Suruga, Noritaka Saeki and Kazushige Ogawa* Abstract Background: Eph signaling is known to induce contrasting cell behaviors such as promoting and inhibiting cell adhesion/ spreading by altering F-actin organization and influencing integrin activities. We have previously demonstrated that EphA2 stimulation by ephrin-A1 promotes cell adhesion through interaction with integrins and integrin ligands in two monocyte/ macrophage cell lines. Although mature mononuclear leukocytes express several members of the EphA/ephrin-A subclass, their expression has not been examined in monocytes undergoing during differentiation and maturation. Results: Using RT-PCR, we have shown that EphA2, ephrin-A1, and ephrin-A2 expression was upregulated in murine bone marrow mononuclear cells during monocyte maturation. Moreover, EphA2 and EphA4 expression was induced, and ephrin-A4 expression was upregulated, in a human promyelocytic leukemia cell line, HL60, along with monocyte differentiation toward the classical CD14++CD16− monocyte subset. Using RT-PCR and flow cytometry, we have also shown that expression levels of αL, αM, αX, and β2 integrin subunits were upregulated in HL60 cells along with monocyte differentiation while those of α4, α5, α6, and β1 subunits were unchanged. Using a cell attachment stripe assay, we have shown that stimulation by EphA as well as ephrin-A, likely promoted adhesion to an integrin ligand- coated surface in HL60 monocytes. Moreover, EphA and ephrin-A stimulation likely promoted the formation of protrusions in HL60 monocytes. -
Mechanosensitivity and Mechanotransduction Series: Mechanosensitivity in Cells and Tissues, Vol
A. Kamkin, I. Kiseleva (Eds.) Mechanosensitivity and Mechanotransduction Series: Mechanosensitivity in Cells and Tissues, Vol. 4 ▶ One book provides a detailed description of molecular mechanisms of mechanosensing and mechanotransduction in different cells ▶ One book brings together a comprehensive outline of modern vision of structure and functions of cytoskeleton ▶ Provides a wide and detailed description of various signaling pathways This book presents the latest findings in the field of research of mechanosensitivity and mechanotransduction in different cells and tissues. Mechanosensitivity and mechanotransduction of the heart and vascular cells, in the lung, in bone and joint tissues, in sensor systems and in blood cells are described in detail. This Volume focuses on molecular mechanisms 2011, XXIV, 371 p. of mechanosensitivity and mechanotransduction via cytoskeleton. Integrin-mediated mechanotransduction, the role of actin cytoskeleton and the role of other cytoskeletal elements are discussed. It contains a detailed description of several stretch-induced Printed book signaling cascades with multiple levels of crosstalk between different pathways. It Hardcover contains a description of the role of nitric oxide in regulation of cardiac activity and in ISBN 978-90-481-9880-1 regulation of mechanically gated channels in the heart. In the heart mechanical signals are propagated into the intracellular space primarily via integrin-linked complexes, ▶ 219,99 € | £199.99 and are subsequently transmitted from cell to cell via paracrine signaling. Biochemical ▶ *235,39 € (D) | 241,99 € (A) | CHF 259.50 signals derived from mechanical stimuli activate both acute phosphorylation of signaling cascades, such as in the PI3K, FAK, and ILK pathways, and long-term morphological modii cations via intracellular cytoskeletal reorganization and extracellular matrix remodelling. -
Crosstalk Between Integrin and Receptor Tyrosine Kinase Signaling in Breast Carcinoma Progression
BMB reports Mini Review Crosstalk between integrin and receptor tyrosine kinase signaling in breast carcinoma progression Young Hwa Soung, John L. Clifford & Jun Chung* Department of Biochemistry and Molecular Biology, Louisiana State University Health Sciences Center, Shreveport, Louisiana 71130 This review explored the mechanism of breast carcinoma pro- cancer originates from breast epithelial cells that are trans- gression by focusing on integrins and receptor tyrosine kinases formed into metastatic carcinomas. Metastatic potential and re- (or growth factor receptors). While the primary role of integrins sponsiveness to treatment vary depending on the expression of was previously thought to be solely as mediators of adhesive hormone receptors such as estrogen receptor and progesterone interactions between cells and extracellular matrices, it is now receptor (5), RTKs such as ErbB-2, epidermal growth factor re- believed that integrins also regulate signaling pathways that ceptor (EGFR), and hepatocyte growth factor receptor, c-Met control cancer cell growth, survival, and invasion. A large (6), and integrins (7). Major integrins expressed on breast epi- body of evidence suggests that the cooperation between in- thelial cells include α2β1, α3β1, αvβ3, αvβ5, αvβ6, α5β1, tegrin and receptor tyrosine kinase signaling regulates certain α6β1, and α6β4 (7). Among these, this review focuses on signaling functions that are important for cancer progression. αvβ3, α5β1, and α6β4, all of which are upregulated in in- Recent developments on the crosstalk between integrins and vasive breast carcinoma and have well established relation- receptor tyrosine kinases, and its implication in mammary tu- ships with RTKs (8). These integrins serve as receptors for vi- mor progression, are discussed. -
1 Adhesion and Growth Factor Receptor Crosstalk Mechanisms
Adhesion and Growth Factor Receptor Crosstalk Mechanisms Controlling Cell Migration Joanna R. Thomas1,2, Nikki R. Paul3, Mark R. Morgan1† 1. Institute of Translational Medicine, University of Liverpool, Crown Street, Liverpool, L69 3BX, UK. 2. Present Address: Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892, USA 3. Beatson Institute for Cancer Research, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK. † Corresponding author Correspondence to: Dr Mark R. Morgan, PhD, Cellular & Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Crown Street, Liverpool, L69 3BX, UK. Tel: [+44](0)151-795-4992 / e-mail: [email protected] / Twitter: @M_MorganLab Keywords: Integrin, Growth Factor Receptor, Syndecan, Migration, Adhesion, Trafficking, Endocytosis, Signalling, Abbreviations: AKT - AKT Serine/Threonine Kinase c-MET - Hepatocyte growth factor receptor ECM - Extracellular matrix EGF - Epidermal growth factor FAK - Focal adhesion kinase EGFR - Epidermal growth factor receptor FAK - Focal Adhesion Kinase FGFR - Fibroblast growth factor receptor GFR - Growth factor receptor HSPG - heparan sulfate proteoglycans IAC - Integrin-associated complex MAPK - Mitogen activated protein kinase PI3K - Phosphoinositide 3-kinase PKC - Protein kinase C RCP - Rab-coupling protein RTK - Receptor tyrosine kinase TCPTP - T-cell protein tyrosine phosphatase / PTPN2 TGFβ - Transforming growth factor β TGFβR2 - Transforming growth factor β receptor 2 VEGFR2 - Vascular endothelial growth factor receptor 1 Abstract Cell migration requires cells to sense and interpret an array of extracellular signals to precisely co-ordinate adhesion dynamics, local application of mechanical force, polarity signalling and cytoskeletal dynamics. Adhesion receptors and growth factor receptors exhibit functional and signalling characteristics that individually contribute to cell migration. Integrins transmit bidirectional mechanical forces and transduce long-range intracellular signals. -
5 and 2 Integrin Gene Transfers Mimic the PDGF-B–Induced Transformed
0023-6837/01/8109-1263$03.00/0 LABORATORY INVESTIGATION Vol. 81, No. 9, p. 1263, 2001 Copyright © 2001 by The United States and Canadian Academy of Pathology, Inc. Printed in U.S.A. ␣5 and ␣2 Integrin Gene Transfers Mimic the PDGF-B–Induced Transformed Phenotype of Fibroblasts in Human Skin Mark Nesbit, Helmut Schaider, Carola Berking, Daw-Tsun Shih, Mei-Yu Hsu, Michelle McBrian, Timothy M. Crombleholme, Rosalie Elenitsas, Clayton Buck, and Meenhard Herlyn The Wistar Institute (MN, HS, CB, D-TS, M-YH, MM, CB, MH), Philadelphia; Department of Surgery (TMC), The Children’s Hospital of Philadelphia, Philadelphia; and Department of Dermatology (RE), University of Pennsylvania, Philadelphia, Pennsylvania SUMMARY: Platelet-derived growth factor (PDGF)-B is a proto-oncogene capable of transforming fibroblasts. Using adenoviral vectors, we tested whether endogenous PDGF-B expression in human skin xenotransplants leads to changes in the expression of ␣5 and ␣2 integrin subunits and whether integrin overexpression leads to PDGF-related changes in the skin. In vitro, transduction of fibroblasts with PDGF-B or the integrin ␣5 subunit stimulated multilayered growth and spindle-type morphology, both markers of mesenchymal cell transformation. In vivo, PDGF-B transduction of the human dermis was associated with up-regulation of collagen and fibronectin synthesis, increases in ␣5 and ␣2 integrin subunit expression, vessel formation, and proliferation of fibroblasts, keratinocytes, and pericytes. A similar stromal response was induced when ␣5 and ␣2 integrin subunits were overexpressed in the human dermis, suggesting that integrins play a major role in the induction of a transformed phenotype of fibroblasts by PDGF-B. -
Metabolic Imaging Allows Early Prediction of Response to Vandetanib
Metabolic Imaging Allows Early Prediction of Response to Vandetanib Martin A. Walter1,2,MatthiasR.Benz2,IsabelJ.Hildebrandt2, Rachel E. Laing2, Verena Hartung3, Robert D. Damoiseaux4, Andreas Bockisch3, Michael E. Phelps2,JohannesCzernin2, and Wolfgang A. Weber2,5 1Institute of Nuclear Medicine, University Hospital, Bern, Switzerland; 2Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, UCLA, Los Angeles, California; 3Institute of Nuclear Medicine, University Hospital, Essen, Germany; 4Molecular Shared Screening Resources, UCLA, Los Angeles, California; and 5Department of Nuclear Medicine, University Hospital, Freiburg, Germany The RET (rearranged-during-transfection protein) protoonco- The RET (rearranged-during-transfection protein) proto- gene triggers multiple intracellular signaling cascades regulat- oncogene, located on chromosome 10q11.2, encodes for ing cell cycle progression and cellular metabolism. We therefore a tyrosine kinase of the cadherin superfamily that activates hypothesized that metabolic imaging could allow noninvasive detection of response to the RET inhibitor vandetanib in vivo. multiple intracellular signaling cascades regulating cell sur- Methods: The effects of vandetanib treatment on the full- vival, differentiation, proliferation, migration, and chemo- genome expression and the metabolic profile were analyzed taxis (1). Gain-of-function mutations in the RET gene result in the human medullary thyroid cancer cell line TT. In vitro, tran- in uncontrolled growth and cause human cancers and scriptional changes of pathways regulating cell cycle progres- cancer syndromes, such as Hu¨rthle cell cancer, sporadic sion and glucose, dopa, and thymidine metabolism were papillary thyroid carcinoma, familial medullary thyroid correlated to the results of cell cycle analysis and the uptake of 3H-deoxyglucose, 3H-3,4-dihydroxy-L-phenylalanine, and carcinoma, and multiple endocrine neoplasia types 2A 3H-thymidine under vandetanib treatment. -
Regulatory Networks in Mechanotransduction Reveal Key Genes in Promoting Cancer Cell Stemness and Proliferation
Oncogene (2019) 38:6818–6834 https://doi.org/10.1038/s41388-019-0925-0 ARTICLE Regulatory networks in mechanotransduction reveal key genes in promoting cancer cell stemness and proliferation 1 2 2 1 3 3 1 3,4 Wei Huang ● Hui Hu ● Qiong Zhang ● Xian Wu ● Fuxiang Wei ● Fang Yang ● Lu Gan ● Ning Wang ● 1 2 Xiangliang Yang ● An-Yuan Guo Received: 16 January 2019 / Revised: 21 June 2019 / Accepted: 8 July 2019 / Published online: 12 August 2019 © The Author(s) 2019. This article is published with open access Abstract Tumor-repopulating cells (TRCs) are cancer stem cell (CSC)-like cells with highly tumorigenic and self-renewing abilities, which were selected from tumor cells in soft three-dimensional (3D) fibrin gels with unidentified mechanisms. Here we evaluated the transcriptome alteration during TRCs generation in 3D culture and revealed that a variety of molecules related with integrin/membrane and stemness were continuously altered by mechanical environment. Some key regulators such as MYC/STAT3/hsa-miR-199a-5p, were changed in the TRCs generation. They regulated membrane genes and the downstream mechanotransduction pathways such as Hippo/WNT/TGF-β/PI3K-AKT pathways, thus 1234567890();,: 1234567890();,: further affecting the expression of downstream cancer-related genes. By integrating networks for membrane proteins, the WNT pathway and cancer-related genes, we identified key molecules in the selection of TRCs, such as ATF4, SLC3A2, CCT3, and hsa-miR-199a-5p. Silencing ATF4 or CCT3 inhibited the selection and growth of TRCs whereas reduction of SLC3A2 or hsa-miR-199a-5p promoted TRCs growth. Further studies showed that CCT3 promoted cell proliferation and stemness in vitro, while its suppression inhibited TRCs-induced tumor formation. -
Integrin-Mediated Action of Insulin-Like Growth Factor Binding Protein-2 in Tumor Cells
859 Integrin-mediated action of insulin-like growth factor binding protein-2 in tumor cells B S Schütt, M Langkamp, U Rauschnabel1, M B Ranke and M W Elmlinger Pediatric Endocrinology Section, University Children’s Hospital, 72076 Tuebingen, Germany and 1Olga Hospital, 70176 Stuttgart, Germany (Requests for offprints should be addressed to Martin W Elmlinger, Pediatric Endocrinology Section, Children’s Hospital, Hoppe-Seyler-Strasse 1, D-72076 Tuebingen/Germany; Email: [email protected]) (B S Schütt and M Langkamp contributed equally to this work) Abstract The neoplastic production of the insulin-like growth factor binding protein (IGFBP)-2 often correlates with tumor malignancy and aggressiveness. Since IGFBP-2 contains an RGD motif in its C-terminus, it was hypothesized that this protein may act independently of IGF on tumor cells through integrins. To investigate this, integrin binding, intracellular signaling and the impact of IGFBP-2 on cell adhesion and proliferation were examined in two tumor cell lines. In tracer displacement studies, up to 30% of the added 125I-hIGFBP-2 specifically bound to the cells. Bound 125I-hIGFBP-2 was reversibly displaced by IGFBP-2, IGFBP-1 and RGD-(Gly-Arg-Asp)-containing peptides, but not by IGFBP-3, -4, -5, -6 and RGE-(Gly-Arg-Glu)-containing peptides. Blocking with antibodies directed against different integrins and with fibronectin demonstrated that IGFBP-2 cell surface binding is specific for 51-integrin. Incubation of IGFBP-2 with equimolar quantities of IGF-I and IGF-II annihilated RGD-specific binding. IGFBP-2 binding at the cell surface led to dephosphorylation of the focal adhesion-kinase (FAK) of up to 37% (P<0·01), and of the p42/44 MAP-kinases of up to 40% (P<0·01). -
Wound Mechanotransduction in Repair and Regeneration Victor W
REVIEW Pushing Back: Wound Mechanotransduction in Repair and Regeneration Victor W. Wong1, Satoshi Akaishi1, Michael T. Longaker1 and Geoffrey C. Gurtner1 Human skin is a highly specialized mechanorespon- These physical interactions regulate key developmental and sive interface separating our bodies from the external homeostatic mechanisms and underlie the tremendous environment. It must constantly adapt to dynamic functional plasticity of skin (Silver et al., 2003; Blanpain physical cues ranging from rapid expansion during and Fuchs, 2009). Although mechanical forces are implicated embryonic and early postnatal development to ubi- in the pathogenesis of numerous diseases (Ingber, 2003a), quitous external forces throughout life. Despite the their role in cutaneous biology remains poorly understood. suspected role of the physical environment in However, the fundamental mechanisms responsible for cutaneous processes, the fundamental molecular mechanotransduction (the conversion of physical stimuli into mechanisms responsible for how skin responds to biochemical responses) are increasingly being elucidated on force remain unclear. Intracellular pathways convert molecular and cellular levels (Ingber, 2006). The ongoing challenge for researchers and clinicians is to fully understand mechanical cues into biochemical responses (in a these mechanotransduction pathways in living organs so that process known as mechanotransduction) via complex they can be translated into clinical therapies. mechanoresponsive elements that often blur the In 1861, the German anatomist Karl Langer published the distinction between physical and chemical signaling. observation that skin exhibits intrinsic tension (Langer K, For example, cellular focal adhesion components 1978), a finding he attributed to the French surgeon Baron exhibit dual biochemical and scaffolding functions Guillaume Dupuytren. Since then, surgeons have adhered to that are critically modulated by force. -
A6b1 Integrin Induces Proteasome-Mediated Cleavage of Erbb2 in Breast Cancer Cells
Oncogene (2003) 22, 831–839 & 2003 Nature Publishing Group All rights reserved 0950-9232/03 $25.00 www.nature.com/onc a6b1 integrin induces proteasome-mediated cleavage of erbB2 in breast cancer cells Hajime Shimizu*, Takashi Seiki, Makoto Asada, Kentaro Yoshimatsu and Noriyuki Koyama Tsukuba Research Laboratories, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba, Ibaraki 300-2635, Japan ErbB2 and a6 integrin have been implicated in malignancy more motile phenotype, together with the suppression of of breast cancer cells. Here we have determined the apoptosis (O’Connor et al., 1998; Bachelder et al., 1999; influence of a6b1 integrin on erbB2 signaling in ancho- Vogelmann et al., 1999). In contrast to these results, rage-independent growth, using MDA-MB435 breast decreased expression of integrin subunits, including a2, cancer cells. Firstly, we transfected the cells with erbB2 a3, a5, a6, b1 and b4, has been observed, accompanied cDNA, and isolated cells with high or low levels of a6b1 with the loss of cell polarity and basement membrane, at integrin by cell sorting (a6H-ErbB and a6L-ErbB). We the initial stages of breast cancer progression (Koukou- found that an erbB ligand, heregulin b1, enhanced growth lis et al., 1991; Pignatelli et al., 1991; Natali et al., 1992). activity of a6L-ErbB cells, but not a6H-ErbB cells. Further, several reports described the suppression of Secondly, we established cells expressing a b4 integrin transformed phenotype by enforced expression of deletion mutant (b4-Dcyt), which selectively inhibited integrins. a5b1 expression reduced both in vitro and in a6b1 integrin expression and adhesion to laminin-1. -
Loss of the Nuclear Wnt Pathway Effector TCF7L2 Promotes Migration and Invasion of Human Colorectal Cancer Cells
Oncogene (2020) 39:3893–3909 https://doi.org/10.1038/s41388-020-1259-7 ARTICLE Loss of the nuclear Wnt pathway effector TCF7L2 promotes migration and invasion of human colorectal cancer cells 1,2 1 3 4,5,6 2,5 Janna Wenzel ● Katja Rose ● Elham Bavafaye Haghighi ● Constanze Lamprecht ● Gilles Rauen ● 1 7 3,8,9 1,2,5 Vivien Freihen ● Rebecca Kesselring ● Melanie Boerries ● Andreas Hecht Received: 27 September 2019 / Revised: 3 March 2020 / Accepted: 4 March 2020 / Published online: 20 March 2020 © The Author(s) 2020. This article is published with open access Abstract The transcription factor TCF7L2 is indispensable for intestinal tissue homeostasis where it transmits mitogenic Wnt/ β-Catenin signals in stem and progenitor cells, from which intestinal tumors arise. Yet, TCF7L2 belongs to the most frequently mutated genes in colorectal cancer (CRC), and tumor-suppressive functions of TCF7L2 were proposed. This apparent paradox warrants to clarify the role of TCF7L2 in colorectal carcinogenesis. Here, we investigated TCF7L2 dependence/independence of CRC cells and the cellular and molecular consequences of TCF7L2 loss-of-function. By genome editing we achieved complete TCF7L2 inactivation in several CRC cell lines without loss of viability, showing that fi 1234567890();,: 1234567890();,: CRC cells have widely lost the strict requirement for TCF7L2. TCF7L2 de ciency impaired G1/S progression, reminiscent of the physiological role of TCF7L2. In addition, TCF7L2-negative cells exhibited morphological changes, enhanced migration, invasion, and collagen adhesion, albeit the severity of the phenotypic alterations manifested in a cell-line-specific fashion. To provide a molecular framework for the observed cellular changes, we performed global transcriptome profiling and identified gene-regulatory networks in which TCF7L2 positively regulates the proto-oncogene MYC, while repressing the cell cycle inhibitors CDKN2C/CDKN2D.