Yuan D, Tucker P W
J Exp Med. 1982 Oct 1;156(4):962-74. doi: 10.1084/jem.156.4.962.
Analysis of mu-specific mRNA in the B cell tumor line, BCL1, shows that the cells contain predominantly mRNA for mu chain of membrane-bound immunoglobulin M (IgM) (2.7 kb, mu m mRNA). Stimulation of the cells to Ig secretion by lipopolysaccharide (LPS) results in a 6-12 fold increase in amount of mRNA for the mu chain of secreted IgM (2.4 kb mu s mRNA). The increase in mu s mRNA is accompanied by a 3-4-fold increase in mu m mRNA. The rate of mu chain synthesis of membrane IgM in LPS-stimulated cells is, however, reduced by at least twofold, suggesting that both transcriptional and translational regulatory events are involved in the induction of B lymphocytes to secretion.
对B细胞肿瘤系BCL1中μ特异性mRNA的分析表明,这些细胞主要含有膜结合免疫球蛋白M(IgM)μ链的mRNA(2.7 kb,μm mRNA)。用脂多糖(LPS)刺激这些细胞使其分泌Ig,会导致分泌型IgM μ链的mRNA量增加6至12倍(2.4 kb μs mRNA)。μs mRNA的增加伴随着μm mRNA增加3至4倍。然而,LPS刺激的细胞中膜IgM的μ链合成速率至少降低了两倍,这表明转录和翻译调控事件都参与了B淋巴细胞向分泌状态的诱导过程。