title: Tumor necrosis factor-alpha and interleukin-1 alpha expression in a murine model of allergic bronchopulmonary aspergillosis.
abstract: Tumor necrosis factor-alpha (TNF-alpha) and interleukin-1 alpha (IL-1 alpha) are two important proinflammatory cytokines that may be involved in allergic inflammatory processes. We recently developed a murine model of allergic bronchopulmonary aspergillosis characterized by eosinophilic and lymphocyte lung infiltration and increased serum and bronchoalveolar lavage immunoglobulin E concentration. In this study we examined the expression of TNF-alpha and IL-1 alpha in the lung tissue sections of C57BL/6 mice that were intranasally challenged with Aspergillus fumigatus antigen or saline on the first 3 days of each week and sacrificed on days 4, 7, 14, and 21. Compared with the control mice, A. fumigatus treated mice had a remarkable increase of TNF-alpha and IL-1 alpha expression in the lung on days 4, 14, and 21, with a slight increase on day 7. The major types of cells expressing TNF-alpha and IL-1 alpha included alveolar macrophages, endothelial cells, and bronchiolar and alveolar epithelial cells. Consistent with increased expression of TNF-alpha and IL-1 alpha, intercellular adhesion molecule-1 expression also was upregulated in the lung of A. fumigatus treated mice; its time course and cell types were similar to those of TNF-alpha and IL-1 alpha expression. These results suggest that TNF-alpha and IL-1 alpha may be involved in the A. fumigatus induced inflammatory process and that upregulated intercellular adhesion molecule-1 expression may represent one of the roles played by TNF-alpha and IL-1 alpha in this murine model.
authors.affiliation: Unité de Recherche, Hôpital Laval, Université Laval, Ste-Foy, Québec, Canada.
authors.forename: H W
authors.initials: HW
authors.lastname: Chu
authors.forename: J M
authors.initials: JM
authors.lastname: Wang
authors.forename: M
authors.initials: M
authors.lastname: Boutet
authors.forename: M
authors.initials: M
authors.lastname: Laviolette
mesh_terms: D000818:Animals; D001229:Aspergillosis, Allergic Bronchopulmonary / Q000276:immunology / Q000473:pathology*; D001992:Bronchoalveolar Lavage Fluid / Q000166:cytology / Q000276:immunology; D004195:Disease Models, Animal; D005260:Female; D007073:Immunoglobulin E / Q000032:analysis; D007150:Immunohistochemistry; D018799:Intercellular Adhesion Molecule-1 / Q000096:biosynthesis; D007375:Interleukin-1 / Q000096:biosynthesis*; D007958:Leukocyte Count; D008168:Lung / Q000276:immunology / Q000473:pathology; D008213:Lymphocyte Activation; D051379:Mice; D008810:Mice, Inbred C57BL; D013997:Time Factors; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis*; D015854:Up-Regulation / Q000276:immunology
chemical_list: D007375:Interleukin-1; D014409:Tumor Necrosis Factor-alpha; D018799:Intercellular Adhesion Molecule-1; D007073:Immunoglobulin E