Mast cell anaphylatoxin receptor expression can enhance IgE-dependent skin inflammation in mice.

Mast cell anaphylatoxin receptor expression can enhance IgE-dependent skin inflammation in mice.
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DOI:
10.1016/j.jaci.2012.05.009
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发表时间:
2013-02
影响因子:
14.2
通讯作者:
Galli, Stephen J.
Galli, Stephen J.
中科院分区:
医学1区
文献类型:
--
作者:
Schaefer, Beatrix;Piliponsky, Adrian M.;Oka, Tatsuya;Song, Chang Ho;Gerard, Norma P.;Gerard, Craig;Tsai, Mindy;Kalesnikoff, Janet;Galli, Stephen J.

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Mast cells express receptors for complement anaphylatoxins C3a and C5a (i.e., C3aR and C5aR), and C3a and C5a are generated during various IgE-dependent immediate hypersensitivity reactions in vivo. However, it is not clear to what extent mast cell expression of C3aR or C5aR influences C3a- or C5a-induced cutaneous responses or IgE-dependent mast cell activation and passive cutaneous anaphylaxis (PCA), in vivo. Assess whether mouse skin mast cell expression of C3aR or C5aR influences: 1) the cells’ responsiveness to intra-dermal injections of C3a or C5a, or 2) the extent of IgE-dependent mast cell degranulation and PCA in vivo. We measured the magnitude of cutaneous responses to i.d. injections of C3a or C5a, and the extent of IgE-dependent mast cell degranulation and PCA responses, in mice containing mast cells that did or did not express C3aR or C5aR. The majority of the skin swelling induced by i.d. injection of C3a or C5a required that mast cells at the site expressed C3aR or C5aR, respectively, and the extent of IgE-dependent degranulation of skin mast cells and of IgE-dependent PCA were significantly reduced when mast cells lacked either C3aR or C5aR. IgE-dependent PCA responses associated with local elevation of C3a occurred in antibody-deficient mice but not in mice deficient in FcεRIγ. Expression of C3aR and C5aR by skin mast cells contributes importantly to the ability of C3a and C5a to induce skin swelling and can enhance mast cell degranulation and inflammation during IgE-dependent PCA in vivo.
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