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    Enhanced IgE allergic response to Aspergillus fumigatus in CFTR-/- mice

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    Authors
    Mueller, Christian
    Braag, Sofia A.
    Herlihy, John-David
    Wasserfall, Clive H.
    Chesrown, Sarah E.
    Nick, Harry S.
    Atkinson, Mark A.
    Flotte, Terence R.
    UMass Chan Affiliations
    Department of Pediatrics
    Gene Therapy Center
    Document Type
    Journal Article
    Publication Date
    2006-02-21
    Keywords
    Aspergillus fumigatus
    Cystic Fibrosis
    Cystic Fibrosis Transmembrane Conductance Regulator
    Enzyme-Linked Immunosorbent Assay
    Immunoglobulin E
    Allergy and Immunology
    Pediatrics
    Respiratory Tract Diseases
    
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    Link to Full Text
    http://dx.doi.org/10.1038/labinvest.3700379
    Abstract
    To gain insight into aberrant cytokine regulation in cystic fibrosis (CF), we compared the phenotypic manifestations of allergen challenge in gut-corrected CFTR-deficient mice with background-matched C57Bl6 (B6) mice. Aspergillus fumigatus (Af) antigen was used to mimic allergic bronchopulmonary aspergillosis, a peculiar hyper-IgE syndrome with a high prevalence in CF patients. CFTR-/-, C57BL/6 and FVB/NJ mice were sensitized with Af antigen by serial intraperitoneal injections. Control mice were mock sensitized with PBS. Challenges were performed by inhalation of Af antigen aerosol. After Af antigen challenge, histologic analysis showed goblet cell hyperplasia and lymphocytic infiltration in both strains. However, total serum IgE levels were markedly elevated in CF mice. Sensitized CF mice showed a five-fold greater IgE response to sensitization as compared with B6- and FVB-sensitized controls. Additional littermate controls to fully normalize for B6-FVB admixture in the strain background confirmed the role of CFTR mutation in the hyper-IgE syndrome. Cytokine mRNA levels of IL-5 and GM-CSF in the bronchoalveolar lavage (BAL) fluid, and BAL cell differentials indicated that CFTR mutation caused a shift from an IL-5-predominant to an IL-4-predominant cytokine profile. This system models a very specific type of airway inflammation in CF and could provide insights into pathogenesis and treatment of the disease.
    Source

    Lab Invest. 2006 Feb;86(2):130-40.

    Permanent Link to this Item
    http://hdl.handle.net/20.500.14038/43854
    PubMed ID
    16424881
    Notes

    Christian Mueller is cited on this publication as Christian Müller. At the time of publication, Christian Mueller, Sofia Braag, and Terence Flotte were not yet affiliated with the University of Massachusetts Medical School.

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