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首页> 外文期刊>Infection and immunity >Seeligeriolysin O, a Cholesterol-Dependent Cytolysin of Listeria seeligeri, Induces Gamma Interferon from Spleen Cells of Mice
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Seeligeriolysin O, a Cholesterol-Dependent Cytolysin of Listeria seeligeri, Induces Gamma Interferon from Spleen Cells of Mice

机译:Seeligeriolysin O,一种依赖于胆固醇的李斯特菌的溶细胞素,可诱导小鼠脾细胞中的γ-干扰素

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Seeligeriolysin O (LSO), one of the cholesterol-dependent cytolysins produced by Listeria seeligeri, shows 80% homology to listeriolysin O (LLO) produced by Listeria monocytogenes at the amino acid sequence level. In addition to cytolytic activity, LLO has been shown to exhibit cytokine-inducing activity. In order to determine whether LSO is also capable of exhibiting these two different activities, we constructed a recombinant full-length LSO (rLSO530) and a noncytolytic truncated derivative with a C-terminal deletion (rLSO483) and compared these molecules with recombinant LLO. The cytolytic rLSO530 molecule could induce gamma interferon (IFN-γ) production in spleen cells when the cytolytic activity was blocked by treatment with cholesterol. The noncytolytic truncated rLSO483 molecule also induced IFN-γ production. Anti-LLO polyclonal antibody inhibited not only LLO-induced IFN-γ production but also LSO-induced IFN-γ production. Both NK cells and CD11b+ cells were required for LSO-induced IFN-γ production. Among the various cytokines expressed in CD11b+ cells, interleukin-12 (IL-12) and IL-18 appeared to be essential. We concluded that LSO exhibits the same biological activity as LLO.
机译:Seeligeriolysin O(LSO)是 listeria seeligeri 产生的胆固醇依赖性细胞溶素之一,与 Listeria monocytogenes 产生的Listeriolysin O(LLO)具有80%的同源性顺序级别。除溶细胞活性外,LLO还显示出诱导细胞因子的活性。为了确定LSO是否也能够显示这两种不同的活性,我们构建了一个重组全长LSO(rLSO530)和一个具有C端缺失的非溶细胞性截短的衍生物(rLSO483),并将这些分子与重组LLO进行了比较。当溶血活性被胆固醇处理阻断时,溶细胞性rLSO530分子可诱导脾细胞中γ-干扰素(IFN-γ)的产生。非溶细胞性截短的rLSO483分子也诱导产生IFN-γ。抗LLO多克隆抗体不仅抑制LLO诱导的IFN-γ产生,而且抑制LSO诱导的IFN-γ产生。 LSO诱导的IFN-γ的产生需要NK细胞和CD11b + 细胞。在CD11b + 细胞中表达的各种细胞因子中,白介素12(IL-12)和IL-18似乎是必需的。我们得出的结论是,LSO具有与LLO相同的生物活性。

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