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
中科院分区:
文献类型:
--
作者:
Watanabe S;Inoue J
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.
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3.7
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