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首页> 外文期刊>Nature immunology >Plasma cell differentiation and the unfolded protein response intersect at the transcription factor XBP-1.
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Plasma cell differentiation and the unfolded protein response intersect at the transcription factor XBP-1.

机译:浆细胞分化和未折叠的蛋白质反应在转录因子XBP-1处相交。

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摘要

The transcription factor X-box binding protein 1 (XBP-1) is essential for the differentiation of plasma cells and the unfolded protein response (UPR). Here we show that UPR-induced splicing of XBP-1 by the transmembrane endonuclease IRE1 is required to restore production of immunoglobulin in XBP-1-/- mouse B cells, providing an integral link between XBP-1, the UPR and plasma cell differentiation. Signals involved in plasma cell differentiation, specifically interleukin-4, control the transcription of XBP-1, whereas its post-transcriptional processing is dependent on synthesis of immunoglobulins during B cell differentiation. We also show that XBP-1 is involved in controlling the production of interleukin-6, a cytokine that is essential for plasma cell survival. Thus, signals upstream and downstream of XBP-1 integrate plasma cell differentiation with the UPR.
机译:转录因子X-box结合蛋白1(XBP-1)对于浆细胞的分化和未折叠的蛋白应答(UPR)是必不可少的。在这里我们显示跨膜内切核酸酶IRE1的UPR诱导的XBP-1剪接是恢复XBP-1-/-小鼠B细胞中免疫球蛋白的产生所必需的,提供XBP-1,UPR和浆细胞分化之间的整体联系。与浆细胞分化有关的信号,特别是白介素4,控制XBP-1的转录,而其转录后的处理则依赖于B细胞分化过程中免疫球蛋白的合成。我们还显示XBP-1参与控制白细胞介素6的生产,白细胞介素6是浆细胞存活必不可少的细胞因子。因此,XBP-1上游和下游的信号将浆细胞分化与UPR整合在一起。

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