Epidermal growth factor-like activity in bronchoalveolar lavage fluid in experimental silicosis
| Autor: | Roslynn O'grady, Ravikant Kumar, Rakesh K. Kumar, Gary M. Velan |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
medicine.medical_specialty
Pathology medicine.medical_treatment Clinical Biochemistry Immunocytochemistry Silicosis Mice Radioligand Assay Endocrinology Epidermal growth factor Internal medicine Pulmonary fibrosis Macrophages Alveolar Medicine Animals Lung Cells Cultured Mice Inbred BALB C medicine.diagnostic_test Inhalation Epidermal Growth Factor business.industry Growth factor Cell Biology respiratory system Fibroblasts medicine.disease respiratory tract diseases Specific Pathogen-Free Organisms Bronchoalveolar lavage medicine.anatomical_structure Female business Bronchoalveolar Lavage Fluid Cell Division |
| Zdroj: | Growth factors (Chur, Switzerland). 10(3) |
| ISSN: | 0897-7194 |
| Popis: | We investigated whether development of pulmonary fibrosis following inhalational exposure of mice to silica (quartz) dust was accompanied by enhanced secretion of activity resembling epidermal growth factor (EGF). Mitogenic activity for pulmonary fibroblasts was assessed in bronchoalveolar lavage fluid (BALF) using a serum-free bioassay. Activity in BALF from mice exposed to nonfibrogenic titanium dioxide dust was comparable to that in BALF from normal animals. In contrast, mitogenic activity was significantly increased at 6 and 12 weeks after inhalation of silica particles, coinciding with the appearance of collagenised lesions in the lung. BALF from mice exposed to silica 6 weeks previously had significantly higher concentrations of growth factor(s) able to bind to EGF receptors on pulmonary fibroblasts. In parallel, macrophages within inflammatory lesions in the airspaces acquired immunoreactivity for EGF. The presence of an increased concentration of EGF-like growth factor(s) in BALF might constitute a marker of particle-induced pulmonary fibrosis. |
| Databáze: | OpenAIRE |
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