Abstract
Background: Previous studies with cattle and rodent models have shown that bovine and human RSV infections influence the immune response to inhaled allergen. In the present study, we extended these observations to examine the effect of fungal allergen Alternaria alternata aerosol exposure (prior to and during BRSV infection) on the immune response and clinical outcome of a secondary BRSV infection. Methods: Calves were either Alternaria (Alt)/mock Alt (mAlt) and BRSV/mBRSV exposed. Exposures began on day -6 and continued every other day until day 6 post infection. A second set of aerosols/infection began on day 103 and continued as before. Clinical outcome during infections was measured in each group. IgG1, IgA, and IgE responses to Alternaria were measured in serum or bronchiolar alveolar lavage fluid (BALF). Cytokine responses, including IL-4, were also measured. Results: Alternaria did not influence primary infection; however, the Alt/BRSV group had less disease than mAlt/BRSV group (median clinical score 8 vs 476.5; p≤0.01) after secondary infection. Exposure to Alternaria facilitated IgE antibody production in BRSV infected calves. IgE responses to Alternaria were higher in Alt/BRSV than Alt/mBRSV animals on day 10 (mean baseline fold increase 1.97 vs 1.06; p=0.013) and 109 (1.40 vs 0.810; p=0.008). Comparatively, Alt/BRSV calves had less Alternaria specific IgG1 than Alt/mBRSV calves on days 0, 107, 109, 113, 115, and 120 (p≤0.05) with more lung eosinophils and IL-4 secreting PBMCs. Conclusion: Alternaria aerosols during primary and secondary BRSV infections decreased disease in secondary infections; however, BRSV infection enhanced Th2 responses against inhaled Alternaria.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 138-156 |
| Number of pages | 19 |
| Journal | Comparative Immunology, Microbiology and Infectious Diseases |
| Volume | 29 |
| Issue number | 2-3 |
| DOIs | |
| State | Published - Mar 2006 |
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Keywords
- Alternaria alternata
- BRSV
- IgE
ASJC Scopus subject areas
- Animal Science and Zoology
- Immunology
- Microbiology
- veterinary(all)
Cite this
Alternaria aerosol during a bovine respiratory syncytial virus infection alters the severity of subsequent re-infection and enhances IgE production. / Kalina, W. V.; Anderson, Mark L; Gershwin, Laurel J.
In: Comparative Immunology, Microbiology and Infectious Diseases, Vol. 29, No. 2-3, 03.2006, p. 138-156.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Alternaria aerosol during a bovine respiratory syncytial virus infection alters the severity of subsequent re-infection and enhances IgE production
AU - Kalina, W. V.
AU - Anderson, Mark L
AU - Gershwin, Laurel J
PY - 2006/3
Y1 - 2006/3
N2 - Background: Previous studies with cattle and rodent models have shown that bovine and human RSV infections influence the immune response to inhaled allergen. In the present study, we extended these observations to examine the effect of fungal allergen Alternaria alternata aerosol exposure (prior to and during BRSV infection) on the immune response and clinical outcome of a secondary BRSV infection. Methods: Calves were either Alternaria (Alt)/mock Alt (mAlt) and BRSV/mBRSV exposed. Exposures began on day -6 and continued every other day until day 6 post infection. A second set of aerosols/infection began on day 103 and continued as before. Clinical outcome during infections was measured in each group. IgG1, IgA, and IgE responses to Alternaria were measured in serum or bronchiolar alveolar lavage fluid (BALF). Cytokine responses, including IL-4, were also measured. Results: Alternaria did not influence primary infection; however, the Alt/BRSV group had less disease than mAlt/BRSV group (median clinical score 8 vs 476.5; p≤0.01) after secondary infection. Exposure to Alternaria facilitated IgE antibody production in BRSV infected calves. IgE responses to Alternaria were higher in Alt/BRSV than Alt/mBRSV animals on day 10 (mean baseline fold increase 1.97 vs 1.06; p=0.013) and 109 (1.40 vs 0.810; p=0.008). Comparatively, Alt/BRSV calves had less Alternaria specific IgG1 than Alt/mBRSV calves on days 0, 107, 109, 113, 115, and 120 (p≤0.05) with more lung eosinophils and IL-4 secreting PBMCs. Conclusion: Alternaria aerosols during primary and secondary BRSV infections decreased disease in secondary infections; however, BRSV infection enhanced Th2 responses against inhaled Alternaria.
AB - Background: Previous studies with cattle and rodent models have shown that bovine and human RSV infections influence the immune response to inhaled allergen. In the present study, we extended these observations to examine the effect of fungal allergen Alternaria alternata aerosol exposure (prior to and during BRSV infection) on the immune response and clinical outcome of a secondary BRSV infection. Methods: Calves were either Alternaria (Alt)/mock Alt (mAlt) and BRSV/mBRSV exposed. Exposures began on day -6 and continued every other day until day 6 post infection. A second set of aerosols/infection began on day 103 and continued as before. Clinical outcome during infections was measured in each group. IgG1, IgA, and IgE responses to Alternaria were measured in serum or bronchiolar alveolar lavage fluid (BALF). Cytokine responses, including IL-4, were also measured. Results: Alternaria did not influence primary infection; however, the Alt/BRSV group had less disease than mAlt/BRSV group (median clinical score 8 vs 476.5; p≤0.01) after secondary infection. Exposure to Alternaria facilitated IgE antibody production in BRSV infected calves. IgE responses to Alternaria were higher in Alt/BRSV than Alt/mBRSV animals on day 10 (mean baseline fold increase 1.97 vs 1.06; p=0.013) and 109 (1.40 vs 0.810; p=0.008). Comparatively, Alt/BRSV calves had less Alternaria specific IgG1 than Alt/mBRSV calves on days 0, 107, 109, 113, 115, and 120 (p≤0.05) with more lung eosinophils and IL-4 secreting PBMCs. Conclusion: Alternaria aerosols during primary and secondary BRSV infections decreased disease in secondary infections; however, BRSV infection enhanced Th2 responses against inhaled Alternaria.
KW - Alternaria alternata
KW - BRSV
KW - IgE
UR - http://www.scopus.com/inward/record.url?scp=33646349198&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33646349198&partnerID=8YFLogxK
U2 - 10.1016/j.cimid.2006.03.002
DO - 10.1016/j.cimid.2006.03.002
M3 - Article
C2 - 16644011
AN - SCOPUS:33646349198
VL - 29
SP - 138
EP - 156
JO - Comparative Immunology, Microbiology and Infectious Diseases
JF - Comparative Immunology, Microbiology and Infectious Diseases
SN - 0147-9571
IS - 2-3
ER -