Semi-quantitative polymerase chain reaction analysis of cytokine and cytokine receptor gene expression during thymic ontogeny.

Semi-quantitative polymerase chain reaction analysis of cytokine and cytokine receptor gene expression during thymic ontogeny.
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胸腺个体发育过程中细胞因子和细胞因子受体基因表达的半定量聚合酶链反应分析。

DOI:
10.1006/cyto.1997.0227
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发表时间:
1997
期刊:
影响因子:
3.8
通讯作者:
Dallman,MJ
Dallman,MJ
中科院分区:
医学3区
文献类型:
--
作者:
Montgomery,RA;Dallman,MJ

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半定量,聚合酶链反应(PCR)被用来揭示模式的细胞因子转录在小鼠胸腺从第14天到第20天的妊娠,这段时间,其中包括许多重要的事件在胸腺个体发育。白细胞介素4(IL-4)、IL-7和干扰素γ(IFN-γ)mRNA在胎儿14-16天(Fd)大量表达,这与体内未成熟胸腺细胞的快速增殖期相对应。随着这些细胞因子的mRNA水平降低,IL-3和IL-2的诱导和表达增加。这些细胞因子的转录在时间上与Fd 16和20之间的增殖依赖性表型分化期相关。胸腺上皮(TE)衍生的细胞因子包括IL-1α、IL-6和粒细胞-巨噬细胞集落刺激因子(GM-CSF)开始在Fd 14-15之间转录,并在Fd 16-20显示峰值mRNA丰度。IL-5、肿瘤坏死因子α(TNF-α)和LT(光毒素或TNF-β)与IL-4受体(IL-4 R)沿着构成了第四组细胞因子,它们在整个胎儿期以均匀的水平转录。IL-2受体β链(IL-2 R β)和IL-10在Fd 14-20显示出丰富的mRNA,并在Fd 16具有峰值水平的mRNA含量。总之,这些研究揭示了复杂的,重叠的细胞因子基因表达模式。每种细胞因子或细胞因子受体的mRNA丰度和表达模式可能表明其对胎儿胸腺个体发育不同阶段的相对贡献。
Semi-quantitative, polymerase chain reaction (PCR) is used to uncover the patterns of cytokine transcription in the mouse thymus from day 14 to day 20 of gestation, a time period which includes many of the important events in thymic ontogeny. Interleukin 4 (IL-4), IL-7 and interferon γ (IFN-γ) mRNA is abundant from fetal day (Fd) 14–16, corresponding with the period of rapid proliferation of immature thymocytes in vivo. As the level of mRNA for these cytokines diminishes, the induction and increased expression of IL-3 and IL-2 occurs. The transcription of these cytokines correlates temporally with the period of proliferation-dependent phenotypic differentiation between Fd 16 and 20. The thymic epithelium (TE)-derived cytokines including IL-1α, IL-6 and granulocyte-macrophage colony-stimulating factor (GM-CSF) begin to be transcribed between Fd 14–15 and show peak mRNA abundance from Fd 16-20. IL-5, tumour necrosis factor α (TNF-α) and LT (lymphotoxin or TNF-β) constitute a fourth group of cytokines, along with the IL-4 receptor (IL-4R), which are transcribed at an even level throughout the fetal period. The IL-2 receptor beta chain (IL-2Rβ) and IL-10 show abundant mRNA from Fd 14–20 and have a peak level of mRNA content on Fd 16. Taken together, these studies uncover complex, overlapping patterns of cytokine gene expression. The mRNA abundance and pattern of expression of each cytokine or cytokine receptor may indicate the relative contribution that it makes to different stages of fetal thymic ontogeny.
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