Antigen-independent regulation of cytoplasmic calcium in B cells with a 12-kDa B-cell growth factor and anti-CD19.

Antigen-independent regulation of cytoplasmic calcium in B cells with a 12-kDa B-cell growth factor and anti-CD19.
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使用 12-kDa B 细胞生长因子和抗 CD19 对 B 细胞中细胞质钙进行抗原非依赖性调节。

DOI:
10.1073/pnas.85.6.1897
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发表时间:
1988
影响因子:
11.1
通讯作者:
Uckun,FM
Uckun,FM
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Ledbetter,JA;Rabinovitch,PS;June,CH;Song,CW;Clark,EA;Uckun,FM

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在静息B细胞中,细胞质游离钙([Ca 2 +]i)的增加可以通过低分子量(12-kDa)B细胞生长因子(LMW-BCGF)或通过B细胞抗原CD 19与单克隆抗体(mAb)交联来诱导。LMW-BCGF引起外周血和扁桃体B细胞[Ca 2 +]i缓慢增加,但对静息T细胞[Ca 2 +]i无影响。LMW-BCGF可增强抗表面免疫球蛋白(sIg)或抗CD 19介导的B细胞[Ca 2 +]i应答,但抗sIg和抗CD 19未显示累加[Ca 2 +]i应答。LMW-BCGF和抗CD 19诱导的[Ca 2 +]i信号与sIgM或sIgD介导的信号相似,因为它们被预先用佛波醇12-肉豆蔻酸酯13-乙酸酯处理抑制。然而,LMW-BCGF和CD 19介导的信号不依赖于sIg的表达,因为它们也在sIg-B细胞前体急性淋巴细胞白血病(ALL)细胞上观察到。抗-CD 19和LMW-BCGF均刺激ALL细胞的体外集落形成,并且当一起使用时显示累加效应。[Ca2对LMW-BCGF或CD 19交联的+]i应答在某些前B细胞和淋巴瘤B细胞系上也是明显的。
Increases in cytoplasmic free calcium ([Ca2+]i) can be induced in resting B cells either by a low molecular weight (12-kDa) B-cell growth factor (LMW-BCGF) or by crosslinking the B-cell antigen CD19 with monoclonal antibody (mAb). LMW-BCGF causes a slow [Ca2+]i increase in peripheral blood and tonsillar B cells but has no effect on [Ca2+]i in resting T cells. B-cell [Ca2+]i responses mediated by anti-surface immunoglobulin (sIg) or anti-CD19 are potentiated by LMW-BCGF, but anti-sIg and anti-CD19 do not show additive [Ca2+]i responses. LMW-BCGF- and anti-CD19-induced [Ca2+]i signals are similar to the sIgM or sIgD-mediated signals in that they are inhibited by prior treatment with phorbol 12-myristate 13-acetate. However, LMW-BCGF- and CD19-mediated signals do not depend on the expression of sIg, since they were also observed on sIg-B-cell precursor acute lymphoblastic leukemia (ALL) cells. Both anti-CD19 and LMW-BCGF stimulated in vitro colony formation by ALL cells and showed additive effects when used together. [Ca2+]i responses to LMW-BCGF or CD19 cross-linking were also evident on certain pre-B-cell and lymphoma B-cell lines.
仙台病毒特异性 T 细胞克隆:通过针对辅助 T 细胞克隆的抗独特型抗体诱导溶细胞 T 细胞。
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