The overall objective of this grant proposal is to investigate the role of individual adhesion molecules, as well as cytokines which modulate adhesion molecule expression, in the allergen mediated adhesion of eosinophils to endothelium in vitro and in vivo. In vivo studies of eosinophil adhesion to endothelium will utilize adhesion molecule and cytokine knockout mice to assess the relative importance of an individual adhesion molecule (P- selectin, E-selectin and ICAM) or cytokines which modulates adhesion molecule expression (TNF, IL-1) to the allergen mediated adhesion of eosinophils to endothelium. Fluorescently labelled mouse eosinophils will be injected into the tail vein of allergen challenged adhesion molecule/cytokine knockout or control mice and the rolling, adhesion and transmigration of the fluorescently labelled eosinophils compared in vivo in the two groups of mice using intravital videomicroscopy. The in vitro videomicroscopy studies of eosinophil adhesion to endothelium will use a novel single cell adhesion assay able to measure strength of adhesion in (mdynes) to determine whether juxtacrine cytokine signalling from endothelium to eosinophil modulates the function state of VLA-4 (as opposed to the number of VLA-4 receptors) to affect eosinophil binding to its counterreceptors (VCAM or CS-1) under static and flow conditions. FACS analysis and confocal laser scanning microscopy will determine whether eosinophil active cytokines alter VLA-4 receptor number of receptor distribution in association with changes in VLA-4 adhesive function. To determine whether endothelial lumenal expressed cytokines such as GM-CSF can function in juxtacrine signalling to eosinophils under conditions of flow we will determine whether endothelial cells express cell surface GM- CSF (as opposed to secreted GM-CSF) using immunohistochemistry, confocal microscopy and radiolabelled GM-CSF. The functional ability of endothelial expressed GM-CSF to signal to eosinophils will be assessed under conditions of flow using a parallel plate flow chamber. Overall, these studies should improve our understanding of the molecular mechanisms of eosinophil adhesion to endothelium in vitro and in vivo.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Research Project (R01)
Project #
5R01AI038425-04
Application #
2887060
Study Section
Immunological Sciences Study Section (IMS)
Program Officer
Plaut, Marshall
Project Start
1996-04-01
Project End
2001-03-31
Budget Start
1999-04-01
Budget End
2000-03-31
Support Year
4
Fiscal Year
1999
Total Cost
Indirect Cost
Name
University of California San Diego
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
077758407
City
La Jolla
State
CA
Country
United States
Zip Code
92093
Karta, Maya R; Rosenthal, Peter S; Beppu, Andrew et al. (2018) ?2 integrins rather than ?1 integrins mediate Alternaria-induced group 2 innate lymphoid cell trafficking to the lung. J Allergy Clin Immunol 141:329-338.e12
Doherty, Taylor A; Broide, David H (2018) Lipid regulation of group 2 innate lymphoid cell function: Moving beyond epithelial cytokines. J Allergy Clin Immunol 141:1587-1589
Miller, Marina; Vuong, Christine; Garcia, Meghan Farrell et al. (2018) Does reduced zona pellucida binding protein 2 (ZPBP2) expression on chromosome 17q21 protect against asthma? J Allergy Clin Immunol 142:706-709.e4
Chen, Jun; Miller, Marina; Unno, Hirotoshi et al. (2018) Orosomucoid-like 3 (ORMDL3) upregulates airway smooth muscle proliferation, contraction, and Ca2+ oscillations in asthma. J Allergy Clin Immunol 142:207-218.e6
Miller, Marina; Rosenthal, Peter; Beppu, Andrew et al. (2017) Oroscomucoid like protein 3 (ORMDL3) transgenic mice have reduced levels of sphingolipids including sphingosine-1-phosphate and ceramide. J Allergy Clin Immunol 139:1373-1376.e4
Song, Dae Jin; Miller, Marina; Beppu, Andrew et al. (2017) Rhinovirus Infection of ORMDL3 Transgenic Mice Is Associated with Reduced Rhinovirus Viral Load and Airway Inflammation. J Immunol 199:2215-2224
Eastman, Jacqueline J; Cavagnero, Kellen J; Deconde, Adam S et al. (2017) Group 2 innate lymphoid cells are recruited to the nasal mucosa in patients with aspirin-exacerbated respiratory disease. J Allergy Clin Immunol 140:101-108.e3
Lund, Sean J; Portillo, Alex; Cavagnero, Kellen et al. (2017) Leukotriene C4 Potentiates IL-33-Induced Group 2 Innate Lymphoid Cell Activation and Lung Inflammation. J Immunol 199:1096-1104
Miller, Marina; Tam, Arvin B; Mueller, James L et al. (2017) Cutting Edge: Targeting Epithelial ORMDL3 Increases, Rather than Reduces, Airway Responsiveness and Is Associated with Increased Sphingosine-1-Phosphate. J Immunol 198:3017-3022
Das, Sudipta; Miller, Marina; Beppu, Andrew K et al. (2016) GSDMB induces an asthma phenotype characterized by increased airway responsiveness and remodeling without lung inflammation. Proc Natl Acad Sci U S A 113:13132-13137

Showing the most recent 10 out of 80 publications