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Dendritic cell-mediated delivery of doxorubicin-polyglycerol-nanodiamond composites elicits enhanced anti-cancer immune response in glioblastoma.

Abstract：

:Glioblastoma (GBM) is the deadliest and most common type of primary brain tumor in adults with a grim prognosis despite multimodal treatments. Dendritic cell (DC)-based immunotherapy has emerged as a promising therapeutic modality for GBM, whose efficacy is nonetheless fundamentally undermined by GBM-induced immunosuppression. Inducing emission of damage associated molecular patterns (DAMPs) is a highly effective strategy to subvert tumor-associated immunosuppression. The present work was carried out to explore the idea of subverting the GBM immunosuppressive microenvironment through DC-mediated delivery of doxorubicin-polyglycerol-nanodiamond composites (Nano-DOX), a potent DAMPs inducer demonstrated by our previous study, and thereby eliciting enhanced DC-driven anti-GBM immune response. In the in-vitro work on human cell models, Nano-DOX-loaded DC were shown to be functionally viable and release cargo drug to co-cultured GBM cells (GC). Nano-DOX-treated GC displayed not only profuse DAMPs emission but also antigen release. Enhanced activation and acquisition and presentation of GC-derived antigen were then demonstrated in DC in co-culture with GC and Nano-DOX. Consistently, co-culture with GC and Nano-DOX also activated mouse bone marrow-derived DC (mDC) which in turn stimulated mouse spleen-derived lymphocytes which ultimately suppressed co-cultured GC. Next, athymic mice bearing orthotopic human GBM xenografts were intravenously injected with Nano-DOX-loaded mDC and, 48 h later, spleen-derived lymphocytes. The presence of Nano-DOX, DAMPs emission and enhanced infiltration and activation of mDC and lymphocytes were detected in the GBM xenografts. Taken together, our results demonstrate the efficacy of DC-mediated delivery of Nano-DOX to stimulate GC immunogenicity and elicit anti-cancer immune response in the GBM. By this work, we present a novel approach with great application potential to subverting the GBM immunosuppressive microenvironment and to anti-GBM immunotherapy. Investigation has also been conducted probing the mechanisms by which Nano-DOX stimulates GC immunogenicity, which is described in a follow-up paper.

journal_name

Biomaterials

journal_title

Biomaterials

authors

Li TF,Li K,Zhang Q,Wang C,Yue Y,Chen Z,Yuan SJ,Liu X,Wen Y,Han M,Komatsu N,Xu YH,Zhao L,Chen X

doi

10.1016/j.biomaterials.2018.07.035

subject

Has Abstract

pub_date

2018-10-01 00:00:00

pages

35-52

eissn

0142-9612

issn

1878-5905

pii

S0142-9612(18)30520-9

journal_volume

181

pub_type

杂志文章

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Dendritic cell-mediated delivery of doxorubicin-polyglycerol-nanodiamond composites elicits enhanced anti-cancer immune response in glioblastoma.