In situ Delivery of Antigen to DC-SIGN(+)CD14(+) Dermal Dendritic Cells Results in Enhanced CD8(+) T-Cell Responses.

In situ Delivery of Antigen to DC-SIGN(+)CD14(+) Dermal Dendritic Cells Results in Enhanced CD8(+) T-Cell Responses.
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将抗原原位递送至 DC-SIGN( )CD14( ) 真皮树突细胞可增强 CD8( ) T 细胞反应。

DOI:
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发表时间:
2015
影响因子:
6.5
通讯作者:
Y. Kooyk
Y. Kooyk
中科院分区:
医学1区
文献类型:
--
作者:
C. Fehres;A. V. van Beelen;S. Bruijns;M. Ambrosini;H. Kalay;L. Bloois;W. Unger;J. Garcia;G. Storm;T. D. de Gruijl;Y. Kooyk

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存在于人类皮肤真皮中的 CD14(+) 树突状细胞 (DC) 代表了真皮 DC (dDC) 的一大子集,这些细胞被认为是巨噬细胞样细胞,其抗原(交叉)呈递能力较差且向淋巴结迁移的潜力有限。 CD14(+) dDC高度表达DC特异性ICAM-3抓取非整合素(DC-SIGN),这是一种具有强大内吞能力的受体,促进抗原在细胞内路由至主要组织相容性复合体I和II(MHC-I和II)装载室,以呈递给抗原特异性CD8(+)和CD4(+) T细胞。在这里,我们使用人类皮肤外植体模型表明,使用聚糖修饰的脂质体将抗原原位靶向 DC-SIGN 可增强 CD14(+) dDC 的抗原呈递能力。皮内接种含有黑色素瘤抗原(MART-1或Gp100)的DC-SIGN靶向聚糖Lewis(X)修饰的脂质体,在CD14(+)dDC中积累,并导致增强的Gp100或MART-1特异性CD8(+)T细胞反应。同时皮内注射细胞因子GM-CSF和IL-4作为佐剂可增强皮肤DC的迁移并增加CD14(+)和CD1a(+) dDC上DC-SIGN的表达。这些数据表明,当通过 DC-SIGN 原位靶向时,人 CD14(+) dDC 表现出有效的交叉呈递能力。
CD14(+) dendritic cells (DCs) present in the dermis of human skin represent a large subset of dermal DCs (dDCs) that are considered macrophage-like cells with poor antigen (cross)-presenting capacity and limited migratory potential to the lymph nodes. CD14(+) dDC highly express DC-specific ICAM-3-grabbing non-integrin (DC-SIGN), a receptor containing potent endocytic capacity, facilitating intracellular routing of antigens to major histocompatibility complex I and II (MHC-I andII) loading compartments for the presentation to antigen-specific CD8(+) and CD4(+) T cells. Here we show using a human skin explant model that the in situ targeting of antigens to DC-SIGN using glycan-modified liposomes enhances the antigen-presenting capacity of CD14(+) dDCs. Intradermal vaccination of liposomes modified with the DC-SIGN-targeting glycan Lewis(X), containing melanoma antigens (MART-1 or Gp100), accumulated in CD14(+) dDCs and resulted in enhanced Gp100- or MART-1-specific CD8(+) T-cell responses. Simultaneous intradermal injection of the cytokines GM-CSF and IL-4 as adjuvant enhanced the migration of the skin DCs and increased the expression of DC-SIGN on the CD14(+) and CD1a(+) dDCs. These data demonstrate that human CD14(+) dDCs exhibit potent cross-presenting capacity when targeted in situ through DC-SIGN.
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