Experimental allergic bronchopulmonary aspergillosis in the mouse: immunological and histological features - PubMed (original) (raw)
Experimental allergic bronchopulmonary aspergillosis in the mouse: immunological and histological features
J M Wang et al. Scand J Immunol. 1994 Jan.
Abstract
C57BL/6 mice treated with intranasal instillation of 100 micrograms of Aspergillus antigen three times a week developed a pulmonary eosinophilia, observed in the bronchoalveolar lavage (BAL) and on histopathological examination. At week 3, the instillation of Aspergillus antigen provoked a 10-fold increase in the BAL cell number and eosinophils were the predominant inflammatory cells (66.4%). Histopathological findings showed focal alveolar lesions with peribronchial and perivascular infiltration of lymphoid cells, numerous eosinophils, epithelioid cells, and granulomas with giant cells. Increases in total IgE and IgG1 levels in BAL fluid (33-fold and 14-fold) and serum (67-fold and 8-fold) were observed also (P < 0.05). IgG1 specific to Aspergillus fumigatus (Af) was detected only in the antigen-treated mice. At 12 weeks, there was a persistent but less intense eosinophilia both in BAL and on histopathological examination accompanied by steadily elevated total IgE and total IgG1 and a higher level of specific IgG1-Af in BAL fluids and sera. No bronchocentric granulomatosis, mucoid impaction nor bronchiectasis could be observed. Data from the study described here showed that in mice repeated exposure to Aspergillus antigen leads to a strong inflammatory pulmonary response, characterized by remarkable pulmonary eosinophilia and elevations of total IgE, total IgG1 and specific IgG1-Af in both BAL and serum, which are the hallmarks of human allergic bronchopulmonary aspergillosis also. However, this inflammation did not induce the chronic histological features of the human disease.
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