Essential role for interleukin-2 for CD4(+)CD25(+) T regulatory cell development during the neonatal period.

Essential role for interleukin-2 for CD4(+)CD25(+) T regulatory cell development during the neonatal period.
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DOI:
10.1084/jem.20041179
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发表时间:
2005-03-07
影响因子:
15.3
通讯作者:
Malek, TR
Malek, TR
中科院分区:
医学1区
文献类型:
--
作者:
Bayer, AL;Yu, AX;Adeegbe, D;Malek, TR

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尽管CD 4 + CD 25 + T调节性(Treg)细胞发育的许多方面仍然在很大程度上未知,但通过IL-2 R的信号传导代表了Treg细胞产生的一个特征。因此,本研究旨在进一步确定Treg细胞产生的早期发育步骤,包括更精确地了解白细胞介素(IL)-2在此过程中的作用。在将野生型Treg细胞过继转移到新生IL-2 R β−/−小鼠中后,只有一小部分供体Treg细胞选择性地接种淋巴结(LN)。这些供体Treg细胞经历快速和广泛的IL-2依赖性增殖,随后运输到脾脏。因此,IL-2是新生儿LN中Treg细胞增殖所必需的。正常新生小鼠外周Treg细胞的数量和分布与接受Treg细胞的IL-2 R β−/−小鼠密切相关。然而,对于正常新生儿,阻断IL-2降低了胸腺和LN中的Treg细胞。因此,Treg细胞发育的两个步骤取决于新生小鼠中的IL-2、胸腺产生和随后在LN中的扩增。
Although many aspects of CD4+CD25+ T regulatory (Treg) cell development remain largely unknown, signaling through the IL-2R represents one feature for the production of Treg cells. Therefore, the present study was undertaken to further define early developmental steps in the production of Treg cells, including a more precise view on the role of interleukin (IL)-2 in this process. After adoptive transfer of wild-type Treg cells into neonatal IL-2Rβ−/− mice, only a small fraction of donor Treg cells selectively seeded the lymph node (LN). These donor Treg cells underwent rapid and extensive IL-2–dependent proliferation, followed by subsequent trafficking to the spleen. Thus, IL-2 is essential for Treg cell proliferation in neonatal LN. The number and distribution of Treg cells in the periphery of normal neonatal mice closely paralleled that seen for IL-2Rβ−/− mice that received Treg cells. However, for normal neonates, blockade of IL-2 decreased Treg cells in both the thymus and LN. Therefore, two steps of Treg cell development depend upon IL-2 in neonatal mice, thymus production, and subsequent expansion in the LN.
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