Intracellular delivery of lipopolysaccharide induces effective Th1-immune responses independent of IL-12.

Intracellular delivery of lipopolysaccharide induces effective Th1-immune responses independent of IL-12.
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DOI:
10.1371/journal.pone.0068671
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Inoue J
Inoue J
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Watanabe S;Inoue J

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脂多糖(LPS)是革兰氏阴性菌的许多炎症反应和致病作用的原因,然而,它也诱导保护性免疫反应。LPS诱导树突状细胞(DCs)和巨噬细胞产生炎性细胞因子如TNF-α、IL-6和IL-12。IL-12被认为是LPS诱导的保护性免疫应答之一,即辅助性T细胞1(Th 1)-免疫应答,其包括从Th 1细胞产生IFN-γ和IgG 2c类别转换。在这里,我们清楚地表明,细胞内传递LPS的LPS配制的脂质体(LPS-脂质体)不诱导生产的炎性细胞因子从树突状细胞,但增强Th 1型免疫反应,通过I型干扰素,独立于IL-12。总的来说,我们的研究结果强烈表明,LPS-脂质体可以有效地诱导Th 1免疫反应,而不诱导不必要的炎症,并可能是有用的免疫佐剂,以诱导保护性免疫。
Lipopolysaccharide (LPS) is responsible for many of the inflammatory responses and pathogenic effects of Gram-negative bacteria, however, it also induces protective immune responses. LPS induces the production of inflammatory cytokines such as TNF-α, IL-6, and IL-12 from dendritic cells (DCs) and macrophages. It is thought that IL-12 is required for one of the protective immune responses induced by LPS, the T helper 1 (Th1)-immune response, which include the production of IFN-γ from Th1cells and IgG2c class switching. Here, we clearly demonstrate that intracellular delivery of LPS by LPS-formulated liposomes (LPS-liposomes) does not induce the production of inflammatory cytokines from DCs, but enhances Th1-immune responses via type-I IFNs, independent of IL-12. Collectively, our results strongly suggest that LPS-liposomes can effectively induce Th1-immune responses without inducing unnecessary inflammation, and may be useful as an immune adjuvant to induce protective immunity.
DOI: 10.1371/journal.pone.0060078
发表时间: 2013
期刊: PloS one
影响因子: 3.7
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