- 期刊
Trans-active factors controlling the IL-2 gene in adult human T-cell subsets
摘要
IL-2 secretion in total or subsets of PHA/PMA-stimulated PBMC-derived human T-lymphocytes was monitored and found to be largely due to CD4^+/CD8^- cells. The presence and functional state of transcription factors (TF) was assessed by protein-DNA interaction assays and functional transactivation experiments in the Xenopts oocyte system, modulating IL-2 transcription by injection of proteins. The results reveal that CD4^+CD8^- cells contain both, functional silencer in their resting, and positive TF in their activated states while the CD8^+CD4^- group contains only non-functional positive TF. This demonstrates that the on/off switch of IL-2 transcription is based on the same mechanism in primary T-lymphocytes of mouse spleen and in peripheral human CD4^+/CD8^- cells.
延伸閱讀
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