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
复制标题
BALB/c 小鼠巨噬细胞中 STAT4 和 IFN-γ 表达降低1
作者:
E. Kuroda;Tomohiro Kito;U. Yamashita
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.
DOI:
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发表时间:
1997
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
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作者:
Guler,ML;Jacobson,NG;Gubler,U;Murphy,KM
通讯作者:
Murphy,KM
DOI:
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发表时间:
1991
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
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作者:
Scott,P
通讯作者:
Scott,P
DOI:
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发表时间:
1995
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
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作者:
Keane-Myers,A;Nickell,SP
通讯作者:
Nickell,SP