Bacterial cytoplasmic membranes synergistically enhance the antitumor activity of autologous cancer vaccines

Mice, Inbred C57BL 0301 basic medicine Mice 03 medical and health sciences Adjuvants, Immunologic Cell Membrane Melanoma, Experimental Animals Humans Dendritic Cells CD8-Positive T-Lymphocytes Cancer Vaccines 3. Good health
DOI: 10.1126/scitranslmed.abc2816 Publication Date: 2021-07-07T19:25:03Z
ABSTRACT
Cancer vaccines based on resected tumors from patients have gained great interest as an individualized cancer treatment strategy. However, eliciting a robust therapeutic effect with personalized remains challenge because of the weak immunogenicity autologous tumor antigens. Utilizing exogenous prokaryotic constituents that act adjuvants to enhance is promising strategy overcome this limitation. nonspecific stimulation immune system may elicit undesirable immunopathological state. To specifically trigger sufficient antitumor reactivity without notable adverse effects, we developed antigen and adjuvant codelivery nanoparticle vaccine Escherichia coli cytoplasmic membranes (EMs) cell (TMs) tissue. Introduction EM into hybrid membrane (HM-NPs) induced dendritic maturation, thus activating splenic T cells. HM-NPs showed efficacy in immunogenic CT26 colon 4T1 breast mouse models also efficiently regression B16-F10 melanoma EMT6 models. Furthermore, provoked strong tumor-specific response, which not only extended postoperative animal survival but conferred long-term protection (up 3 months) against rechallenge model. Specific depletion different populations revealed CD8+ NK cells were crucial vaccine-elicited regression. Individualized effective activation innate by bacterial hold potential for cancer.
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