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Cytokine Gene Expression in Normal Human Lymphocytes in Response to Stimulation

机译:正常人淋巴细胞对刺激的细胞因子基因表达

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Sequential gene expression of two type 1 cytokines (interleukin 2 [IL-2] and gamma interferon), one type 2 cytokine (IL-10), two monokines (IL-6 and tumor necrosis factor alpha), and one cytokine receptor (IL-2 receptor [IL-2R]) in normal human peripheral blood mononuclear cells (PBMC) following in vitro stimulation was investigated by reverse transcription-PCR methods. Two stimuli were utilized: phytohemagglutinin (PHA), which acts on the CD2 molecule and T-cell receptors, and anti-CD3 monoclonal antibody, which acts on the CD3 molecule and on T-cell receptors. Increased expression of all studied genes occurred between 1 and 4 hours after stimulation, except for that of the gene encoding IL-10, which was delayed. Expression of all but one of the genes was transient, with a maximal mRNA accumulation at about 8 h on average. IL-2R mRNA expression was an exception, showing a prolonged increase (72 h). The general profiles of expression of the five cytokine genes were similar but not identical, suggesting some shared regulatory mechanisms. When responses to four additional stimuli (pokeweed mitogen, Candida albicans, and IL-2 at high and low doses) were compared, similar profiles of cytokine gene expression were found. Thus, the various stimuli caused induction of all cytokines with quantitative, not qualitative, differences. Altogether, the present data are useful for defining the kinetics of gene expression for key cytokines in response to standard immune-cell stimuli.
机译:两种1型细胞因子(白介素2 [IL-2]和γ干扰素),一种2型细胞因子(IL-10),两种单核因子(IL-6和肿瘤坏死因子α)和一种细胞因子受体(IL)的顺序基因表达通过逆转录PCR方法研究了体外刺激后正常人外周血单个核细胞(PBMC)中的-2受体[IL-2R])。利用了两种刺激:作用于CD2分子和T细胞受体的植物血凝素(PHA)和作用于CD3分子和T细胞受体的抗CD3单克隆抗体。在刺激后的1至4小时内,所有研究基因的表达均发生了增加,但编码IL-10的基因的表达被延迟了。除了其中一个基因外,所有基因的表达都是瞬时的,平均约8 h的最大mRNA积累。 IL-2R mRNA表达是一个例外,显示出延长的增加(72小时)。五个细胞因子基因表达的一般概况相似但不相同,表明存在一些共享的调节机制。当比较对另外四个刺激(商陆有丝分裂原,白色念珠菌和高剂量和低剂量的IL-2)的反应时,发现了相似的细胞因子基因表达谱。因此,各种刺激引起具有定量而非定性差异的所有细胞因子的诱导。总而言之,本数据可用于定义响应于标准免疫细胞刺激的关键细胞因子的基因表达动力学。

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