STAT4 is required for the generation of Th1 and Th2, but not Th17 immune responses during monophosphoryl lipid A adjuvant activity.

STAT4 is required for the generation of Th1 and Th2, but not Th17 immune responses during monophosphoryl lipid A adjuvant activity.
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在单磷酰脂质 A 佐剂活性期间,STAT4 是 Th1 和 Th2 生成所必需的,但不是 Th17 免疫反应所必需的。

DOI:
10.1093/intimm/dxw038
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发表时间:
2016
影响因子:
4.4
通讯作者:
Satoskar,AbhayR
Satoskar,AbhayR
中科院分区:
医学3区
文献类型:
--
作者:
Varikuti,Sanjay;Oghumu,Steve;Natarajan,Gayathri;Kimble,Jennifer;Sperling,RachelH;Moretti,Ellen;Kaplan,MarkH;Satoskar,AbhayR

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STAT 4在Th 1免疫应答的产生过程中对IFN-γ的产生至关重要。我们使用标准抗原卵清蛋白(OVA)在STAT 4 KO小鼠中研究了STAT 4在介导疫苗佐剂单磷酰脂质A(MPL-A)的Th 1诱导活性中的作用。我们的研究结果表明,与野生型(WT)小鼠相比,STAT 4KO小鼠的脾细胞显示出较低的OVA特异性T细胞增殖和IL-2产生。此外,STAT 4KO衍生的脾细胞中IFN-γ的产生减少,但IL-12和TNF-α的水平与WT小鼠相似。有趣的是,STAT 4缺陷还导致MPL-A免疫后IL-10和Th 2细胞因子如IL-4和IL-13的减少,尽管WT和STAT 4KO衍生的脾细胞之间的IL-17产生相似。我们在STAT 4KO小鼠中观察到的Th 1和Th 2应答缺陷进一步得到了这些小鼠血清中Th 1相关IgG 2a和Th 2相关IgG 1低水平的支持。总之,我们的结果表明,STAT 4在介导MPL-A免疫后的Th 1和Th 2应答中起关键作用。我们的研究提供了对MPL-A如何介导T细胞活化的更好理解,这对未来的疫苗开发至关重要。
STAT4 is critical for the production of IFN-γ during the generation of Th1 immune responses. We investigated the role of STAT4 in mediating Th1-inducing activity of a vaccine adjuvant monophosphoryl lipid A (MPL-A) using the standard antigen ovalbumin (OVA) in STAT4KO mice. Our results show that splenocytes from STAT4KO mice displayed lower OVA-specific T-cell proliferation and IL-2 production compared with wild-type (WT) mice. Further, IFN-γ production was diminished in STAT4KO-derived splenocytes but the levels of IL-12 and TNF-α were similar compared with WT mice. Interestingly, STAT4 deficiency also led to a decrease in IL-10 and Th2 cytokines such as IL-4 and IL-13 upon MPL-A immunization, although IL-17 production was similar between WT- and STAT4KO-derived splenocytes. Our observations for defective Th1 and Th2 responses in STAT4KO mice were further supported by the low levels of Th1-associated IgG2a and Th2-associated IgG1 in the sera of these mice. Taken together, our results show that STAT4 plays a critical role in mediating both Th1 and Th2 responses upon immunization with MPL-A. Our study provides a better understanding of how MPL-A mediates T-cell activation which will be critical for future vaccine development.
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