2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) enhances antibody production and protein kinase activity in murine B cells.

2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) enhances antibody production and protein kinase activity in murine B cells.
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2,3,7,8-四氯二苯并-对-二恶英 (TCDD) 增强小鼠 B 细胞中的抗体产生和蛋白激酶活性。

DOI:
10.1016/0006-291x(87)91282-4
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发表时间:
1987
影响因子:
3.1
通讯作者:
Holsapple,MP
Holsapple,MP
中科院分区:
生物学4区
文献类型:
--
作者:
Kramer,CM;Johnson,KW;Dooley,RK;Holsapple,MP

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用30 nM TCDD处理小鼠脾细胞,培养3天后,未受刺激的抗体产生增加约3倍。这种反应并不伴随着细胞增殖的增加,可能代表了TCDD对B细胞活化或分化的影响。由于PMA可能通过PKC激活B细胞,我们比较了PMA和TCDD对高度纯化的B细胞制备物中内源性蛋白的蛋白激酶激活和磷酸化的影响。与PMA的预期效应细胞质PKC活性的降低相反,TCDD引起基础激酶活性的增加,而对PKC活性没有影响。添加PMA或TCDD导致类似蛋白质的磷酸化增强,包括Mr 12.2,14.6,29.2,52.3和62.7 KDa的蛋白质。此外,TCDD也导致增加的蛋白质的磷酸化的Mr 45.2,这是不受PMA。PMA和TCDD联合治疗导致累加反应。PMA和TCDD的相加效应表明,在蛋白质磷酸化水平的相互作用,这是由不同的激酶介导的。因此,TCDD可能通过对未鉴定的蛋白激酶的早期作用刺激B细胞。
Treatment of murine spleen cells with 30 nM TCDD resulted in an approximately 3 fold increase in unstimulated antibody production after 3 days in culture. This response was not accompanied by increased cellular proliferation and may represent an effect of TCDD on B cell activation or differentiation. Since PMA is capable of activating B cells, presumably via PKC, we have compared the effects of PMA and TCDD on protein kinase activation and phosphorylation of endogenous proteins in a highly purified preparation of B cells. In contrast to a reduction of cytosolic PKC activity, the expected effect of PMA, TCDD caused an increase in basal kinase activity with no effect on PKC activity. Addition of either PMA or TCDD resulted in enhanced phosphorylation of a similar profile of proteins, including proteins of Mr 12.2, 14.6, 29.2, 52.3 and 62.7 KDa. Addition of TCDD also resulted in the increased phosphorylation of a protein of Mr 45.2, which was unaffected by PMA. Combined treatment with PMA and TCDD resulted in additive responses. The additive effects of PMA and TCDD suggest an interaction at the level of protein phosphorylation which is mediated by different kinases. Therefore, TCDD may be stimulating B cells via an early effect on an unidentified protein kinase.
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