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A novel transgenic mouse strain expressing PKCβII demonstrates expansion of B1 and marginal zone B cell populations.

Sci Rep. 2020 Aug 04;10(1):13156
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摘要


Protein kinase Cβ expressed in mammalian cells as two splice variants, and functions in the B cell receptor (BCR) signaling pathway and contributes to B cell development. We investigated the relative role of in B cells by generating transgenic mice where expression of the transgene is directed to these cells using the Eµ promoter Our findings demonstrate that homozygous mice displayed a shift from IgD+IgMdim toward IgDdimIgM+ B cell populations in spleen, peritoneum and peripheral blood. Closer examination of these tissues revealed respective expansion of marginal zone (MZ)-like B cells (IgD+IgM+CD43negCD21+CD24+), increased populations of B-1 cells (B220+IgDdimIgM+CD43+CD24+CD5+), and higher numbers of immature B cells (IgDdimIgMdimCD21neg) at the expense of mature B cells (IgD+IgM+CD21+). Therefore, the overexpression of duanyu1531βII, which is a phenotypic feature of chronic lymphocytic leukaemia cells, can skew B cell development in mice, most likely as a result of a regulatory influence on BCR signaling.

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