Attenuation of allergic airway inflammation in IL-4 deficient mice.
To investigate the role of IL-4 in vivo in allergic asthma, we developed a murine model of allergen-induced airway inflammation. Repeated daily exposures of actively immunized C57BL/6 mice to aerosolized ovalbumin (OVA) induced a peribronchial inflammation and an increase in eosinophils and lymphocytes in bronchoalveolar-lavage (BAL) fluid. In IL-4 deficient (IL4-/-) mice, treated in the same way, there were substantially fewer eosinophils in BAL and much less peribronchial inflammation compared with wild type mice. In this model, mast cell deficient (W/Wv) mice developed a similar degree of BAL eosinophilia and peribronchial inflammation as wild type mice, demonstrating that the mast cell is not required for the induction of chronic airway inflammation. In contrast, BAL eosinophilia and airway inflammation were absent in OVA-treated MHC ClassII deficient (B6.Aa-/-) mice which lack mature CD4+ T lymphocytes. In conclusion, these results indicate that IL-4 is a central mediator of allergic airway inflammation, regulating antigen-induced eosinophil recruitment into the airways by a T cell dependent mechanism.
Brusselle
G G
GG
Department of Respiratory Diseases, University Hospital, Ghent, Belgium.
Kips
J C
JC
Tavernier
J H
JH
van der Heyden
J G
JG
Cuvelier
C A
CA
Pauwels
R A
RA
Bluethmann
H
H
D000818:Animals; D001249:Asthma / Q000139:chemically induced / Q000276:immunology* / Q000473:pathology; D001991:Bronchitis / Q000139:chemically induced / Q000276:immunology* / Q000473:pathology; D001992:Bronchoalveolar Lavage Fluid / Q000166:cytology; D004195:Disease Models, Animal; D004802:Eosinophilia / Q000139:chemically induced / Q000276:immunology; D004804:Eosinophils / Q000378:metabolism; D005260:Female; D000949:Histocompatibility Antigens Class II / Q000235:genetics / Q000276:immunology; D007073:Immunoglobulin E / Q000276:immunology; D015847:Interleukin-4 / Q000172:deficiency* / Q000235:genetics / Q000276:immunology; D008168:Lung / Q000276:immunology / Q000473:pathology; D008214:Lymphocytes / Q000378:metabolism; D008407:Mast Cells / Q000276:immunology; D051379:Mice; D008810:Mice, Inbred C57BL; D008817:Mice, Mutant Strains; D013047:Specific Pathogen-Free Organisms
D000949:Histocompatibility Antigens Class II; D015847:Interleukin-4; D007073:Immunoglobulin E