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Optimal therapeutic strategy using antigen-containing liposomes selectively delivered to antigen-presenting cells.


ABSTRACT: Recent immunotherapies have shown clinical success. In particular, vaccines based on particulate antigen (Ag) are expected to be implemented based on their efficacy. In the current study, we describe a strategy entailing Ag-encapsulating PEG-modified liposomes (PGL-Ag) as antigen protein delivery devices and show that the success of the liposome depends on the antigen-presenting cell (APC) capacity; after administration of PGL-Ag, dendritic cells (DCs) in particular take up the Ag and subsequently prime T cells. For the generation of antitumor T cell responses in the lymphoid tissues, the function of encapsulated Ag-capturing DCs in vivo could be a biomarker. We next designed a prime-boost strategy to enhance the antitumor effects of the PGL-Ag. In the tumor sites, we show that Ag retention in nanoparticle-capturing DCs promotes a robust antitumor response. Thus, this efficient particulate Ag-based host antigen-presenting cell delivery strategy provides a bridge between innate and adaptive immune response and offers a novel therapeutic option against tumor cells.

SUBMITTER: Iyoda T 

PROVIDER: S-EPMC6398898 | biostudies-other | 2019 Mar

REPOSITORIES: biostudies-other

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Optimal therapeutic strategy using antigen-containing liposomes selectively delivered to antigen-presenting cells.

Iyoda Tomonori T   Yamasaki Satoru S   Kawamura Masami M   Ueda Motoki M   Son Kon K   Ito Yoshihiro Y   Shimizu Kanako K   Fujii Shin-Ichiro SI  

Cancer science 20190216 3


Recent immunotherapies have shown clinical success. In particular, vaccines based on particulate antigen (Ag) are expected to be implemented based on their efficacy. In the current study, we describe a strategy entailing Ag-encapsulating PEG-modified liposomes (PGL-Ag) as antigen protein delivery devices and show that the success of the liposome depends on the antigen-presenting cell (APC) capacity; after administration of PGL-Ag, dendritic cells (DCs) in particular take up the Ag and subsequent  ...[more]

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