Rescue of CH31 B cells from antigen receptor-induced apoptosis by inhibition of p38 MAPK.

Rescue of CH31 B cells from antigen receptor-induced apoptosis by inhibition of p38 MAPK.
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通过抑制 p38 MAPK 来拯救 CH31 B 细胞免受抗原受体诱导的细胞凋亡。

DOI:
10.1006/bbrc.2000.3489
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发表时间:
2000
影响因子:
3.1
通讯作者:
Chiles,TC
Chiles,TC
中科院分区:
生物学4区
文献类型:
--
作者:
Swart,JM;Chiles,TC

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CH 31 B淋巴瘤代表了未成熟B淋巴细胞抗原诱导缺失耐受的模型,因为交联B细胞抗原受体(BCR)诱导G1期阻滞和凋亡。我们最近证实BCR交联导致CH 31 B细胞中p38丝裂原活化蛋白激酶(MAPK)的瞬时激活。在本文中,我们的功能特性的作用,p38 MAPK在BCR诱导的细胞凋亡,以及评估额外的MAPK的调节BCR。我们证明JNK和ERK活性不受BCR交联的影响,这表明这些MAPK不直接参与启动凋亡级联反应。相比之下,我们发现用高度特异性的p38 MAPK抑制剂SB 203580预处理CH 31 B细胞可以消除BCR诱导的p38 MAPK活性和细胞凋亡。用无活性的SB 203580类似物SB 202474预处理CH 31细胞,不能阻止细胞凋亡。这些发现建立了一个关键的作用,p38 MAPK在抗原受体介导的CH 31 B细胞凋亡。
CH31 B lymphomas represent a model for antigen-induced deletional tolerance of immature B lymphocytes, because cross-linking the B cell antigen receptor (BCR) induces G1phase arrest and apoptosis. We have recently demonstrated that BCR cross-linking leads to a transient activation of p38 mitogen-activated protein kinase (MAPK) in CH31 B cells. In this paper, we functionally characterize the role of p38 MAPK in BCR-induced apoptosis as well as evaluate the regulation of additional MAPKs by the BCR. We demonstrate that JNK and ERK activities are not affected by BCR cross-linking, suggesting that these MAPKs are not directly involved in initiating the apoptotic cascade. By contrast, we show that pretreatment of CH31 B cells with the highly specific p38 MAPK inhibitor SB203580 ablated both BCR-induced p38 MAPK activity and apoptosis. Pretreatment of CH31 cells with an inactive SB203580 analog, SB202474, did not prevent apoptosis. These findings establish a key role for p38 MAPK in antigen receptor-mediated apoptosis of CH31 B cells.
CD40 和 B 细胞抗原受体对 ERK、JNK 和 p38 丝裂原激活蛋白激酶的差异激活。
DOI: 10.4049/jimmunol.157.8.3381
发表时间: 1996
影响因子: 4.4
作者:
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期刊: SCIENCE
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胸腺细胞中的胸腺内信号由 p38 丝裂原激活蛋白激酶介导。
DOI: --
发表时间: 1996
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
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发表时间: 1995-11-24
期刊: SCIENCE
影响因子: 56.9
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XIA, ZG;DICKENS, M;GREENBERG, ME
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p38 丝裂原激活蛋白激酶通过连接 T 或 B 淋巴细胞抗原受体、Fas 或 CD40 来激活,但抑制激酶活性并不能抑制抗原受体诱导的细胞凋亡。
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发表时间: 1997
影响因子: 4.4
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