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Induction in mice of serum IgE levels after treatment with anti‐mouse IgD antibodies is preceded by differential modulation of tissue cytokine gene transcription
Author(s) -
Kricek Franz,
Ruf Christine,
Žunić Melita,
De Jong Gerard,
Dukor Peter,
Bahr George M.
Publication year - 1995
Publication title -
european journal of immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.272
H-Index - 201
eISSN - 1521-4141
pISSN - 0014-2980
DOI - 10.1002/eji.1830250412
Subject(s) - biology , immunoglobulin d , immunoglobulin e , cytokine , immunology , antibody , gene , microbiology and biotechnology , genetics , b cell
Abstract Injection of mice with purified goat anti‐mouse IgD (GAMD) leads to an interleukin (IL)‐4‐dependent increase of serum IgE levels. Challenge of GAMD‐primed mice with goat IgG (GIG) initiates a secondary immune response with elevated serum IgE. In this report, kinetic cytokine transcript profiles of murine lymphoid tissues in response to primary i.v. GAMD treatment, as well as GIG challenge are presented. For the first time, gene transcription patterns of the recently described cytokines IL‐12 and IL‐13 are shown and compared with the corresponding patterns for other cytokine genes involved in IgE regulation, i.e. IL‐4, and interferon (IFN)‐γ. After GAMD injection, two groups of induction profiles were observed in spleen, mesenteric lymph nodes and Peyer's patches: while IL‐4 and IL‐12p35 gene transcription was strongly enhanced, IFN‐γ, IL‐12p40 and IL‐13 mRNA were only moderately induced. Generally, maximal mRNA induction was measured on days 3 to 4 after GAMD treatment. The data demonstrate a clear‐cut difference between the IL‐4 and IL‐13 response on the transcriptional level although both gene products show similar biological activities. The cytokine mRNA profiles support the assumption of IL‐4 playing the central role in generating an IgE response. However, they do not reflect a strict Th1 versus Th2 cytokine gene transcription pattern but rather point towards a concerted action of various, partially antagonizing cytokines with respect to the regulation of IgE synthesis. IL‐12 may, possibly via stimulation of IFN‐γ synthesis, represent a counterbalancing factor in the IL‐4‐mediated IgE response.