Reduced Expression of STAT4 and IFN-γ in Macrophages from BALB/c Mice1

Reduced Expression of STAT4 and IFN-γ in Macrophages from BALB/c Mice1
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BALB/c 小鼠巨噬细胞中 STAT4 和 IFN-γ 表达降低1

DOI:
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发表时间:
2002
影响因子:
4.4
通讯作者:
U. Yamashita
U. Yamashita
中科院分区:
医学2区
文献类型:
--
作者:
E. Kuroda;Tomohiro Kito;U. Yamashita

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在几种感染模型中,BALB/c小鼠已显示容易诱导Th2型应答。在这项研究中,研究的机制,Th2占主导地位的反应,在BALB/c小鼠,我们评估了几个巨噬细胞的功能,使用C3H/HeN,C57 BL/6,和BALB/c小鼠品系。来自三个品系的小鼠的腹膜巨噬细胞通过用LPS加IFN-γ刺激而同等地产生IL-12。然而,BALB/c小鼠巨噬细胞对IL-12或IL-12加IL-18的IFN-γ产生比其他菌株低得多。由活化的巨噬细胞产生的IFN-γ诱导T细胞和巨噬细胞自身中的IL-12 R mRNA表达,这取决于它们的IFN-γ的量;即,来自BALB/c小鼠的巨噬细胞诱导较低的IL-12 R表达。在BALB/c小鼠的巨噬细胞中,STAT4的细胞内水平要低得多。然而,其他STAT,如STAT1或STAT6,在三种小鼠品系中表达相似。在C3 H/HeN和BALB/c小鼠中,其他细胞类型如T细胞和B细胞产生的STAT4和IFN-γ相等。这些结果表明,与其他小鼠品系相比,来自Th2-显性BALB/c小鼠的巨噬细胞具有不同的功能特征;即,STAT4表达和IFN-γ产生减少,这是转变为Th2型应答的原因之一。
BALB/c mice have been shown to easily induce Th2 type responses in several infection models. In this study, to examine the mechanisms of Th2 dominant responses in BALB/c mice, we assessed several macrophage functions using C3H/HeN, C57BL/6, and BALB/c mouse strains. Peritoneal macrophages from three strains of mice equally produced IL-12 by stimulation with LPS plus IFN-γ. However, IFN-γ production in response to IL-12 or IL-12 plus IL-18 was much lower in macrophages from BALB/c mice than other strains. IFN-γ produced by activated macrophages induced IL-12R mRNA expression in T cells and macrophages themselves depending on their amount of IFN-γ; namely, macrophages from BALB/c mice induced lower expression of IL-12R. Intracellular levels of STAT4 were much lower in macrophages from BALB/c mice. However, other STATs, such as STAT1 or STAT6, were expressed similarly in the three mouse strains. STAT4 and IFN-γ production by other cell types such as T cells and B cells were equal in C3H/HeN and BALB/c mice. These results indicate that macrophages from Th2-dominant BALB/c mice have different functional characters compared with other mouse strains; that is, STAT4 expression and IFN-γ production are reduced, which is one of the causes to shift to Th2-type responses.
T 细胞遗传背景决定 IL-12 信号传导的维持:对 BALB/c 和 B10.D2 T 辅助细胞 1 型表型发育的影响。
DOI: --
发表时间: 1997
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
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DOI: --
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期刊: Journal of immunology (Baltimore, Md. : 1950)
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DOI: --
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期刊: Journal of immunology (Baltimore, Md. : 1950)
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