Migration of antibody secreting cells towards CXCL12 depends on the isotype that forms the BCR.

Migration of antibody secreting cells towards CXCL12 depends on the isotype that forms the BCR.
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DOI:
10.1002/eji.200838456
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发表时间:
2008-11
影响因子:
5.4
通讯作者:
Achatz, Gernot
Achatz, Gernot
中科院分区:
医学3区
文献类型:
--
作者:
Achatz-Straussberger, Gertrude;Zaborsky, Nadja;Koenigsberger, Sebastian;Luger, Elke O.;Lamers, Marinus;Crameri, Reto;Achatz, Gernot

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Truncation of the cytoplasmic tail of membrane-bound IgE in vivo results in lower serum IgE levels, decreased numbers of IgE-secreting plasma cells and the abrogation of specific secondary immune responses. Here we present mouse strain KN1 that expresses a chimeric ε-γ1 BCR, consisting of the extracellular domains of the ε gene and the trans-membrane and cytoplasmic domains of the γ1 gene. Thus, differences in the IgE immune response of KN1 mice reflect the influence of the “γ1-mediated signalling” of mIgE bearing B cells. KN1 mice show an increased serum IgE level, resulting from an elevated number of IgE-secreting cells. Although the primary IgE immune response in KN1 mice is inconspicuous, the secondary response is far more robust. Most strikingly, IgE-antibody secreting cells with “γ1-signalling history” migrate more efficiently towards the chemokine CXCL12, which guides plasmablasts to plasma cell niches, than IgE-antibody secreting cells with WT “ε-signalling history”. We conclude that IgE plasmablasts have an intrinsic, lower chance to contribute to the long-lived plasma cell pool than IgG1 plasmablasts.
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