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Failure of B-cell differentiation in mice lacking the transcription factor EBF.

机译:缺乏转录因子EBF的小鼠中B细胞分化失败。

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摘要

Early B-cell factor (EBF) is a cell type-specific transcription factor that is expressed at all antigen-independent stages of B-lymphocyte differentiation and participates in the regulation of the mb-1 gene. Here we show, by targeted gene disruption in mice, that EBF is necessary for the generation of immunoglobulin-expressing B cells. EBF-deficient mice lack B cells that have rearranged their immunoglobulin D and JH gene segments, but contain B220+CD43+ progenitor cells that express germline mu and IL-7 receptor transcripts. Various non-lymphoid tissues that express EBF are apparently normal in homozygous mutant mice, including olfactory neurons in which EBF was identified as Olf-1 (refs 5, 6). Together, these data suggest that EBF plays a specific and important role in the transcriptional control of B-cell differentiation at a stage before Ig (immunoglobulin) gene rearrangement but after commitment of cells to the B-lymphoid lineage.
机译:早期B细胞因子(EBF)是一种特定于细胞类型的转录因子,在B淋巴细胞分化的所有不依赖抗原的阶段表达,并参与mb-1基因的调节。在这里,我们通过小鼠中的靶向基因破坏表明,EBF对于表达免疫球蛋白的B细胞的生成是必需的。缺乏EBF的小鼠缺乏重新排列其免疫球蛋白D和JH基因区段的B细胞,但含有表达种系mu和IL-7受体转录本的B220 + CD43 +祖细胞。表达EBF的各种非淋巴组织在纯合突变小鼠中显然是正常的,包括嗅觉神经元,其中EBF被确定为Olf-1(参考文献5、6)。总之,这些数据表明,EBF在Ig(免疫球蛋白)基因重排之前但在细胞定向于B淋巴谱系之后的阶段,在B细胞分化的转录控制中起着特定而重要的作用。

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