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- W3204342250 abstract "Immunotherapy emerges as a potential therapeutic strategy against tumor relapse. However, immunosuppressive tumor microenvironment poses an obstacle to immunotherapy. Of particular note is that macrophages are abundant in solid tumors and tumor-associated macrophages (TAMs) are mainly anti-inflammatory and protumoral. Therefore, re-educating TAMs will be critical for improving the antitumor efficacy of immunotherapy. Herein we engineered a macrophage-derived implantable vaccine for suppressing postsurgical tumor relapse. The vaccine comprised hybrid cytomembranes from macrophages/tumor cells and an immunoadjuvant, cytosinephosphate-guanosine oligodeoxynucleotides (CpG ODNs). The vaccine was further embedded into a calcium alginate hydrogel for tissue-localized delivery. Results show that the vaccine could induce the shift from anti-inflammatory M2-like TAMs to proinflammatory M1-like macrophage. Moreover, the vaccine stimulated systemic immunity by facilitating dendritic cells (DCs) maturation and memory T (T EM) cell activation, forming a self-replenishing circulation in tumor microenvironment. Consequently, the vaccine could prevent the postsurgical tumor relapse at both the primary and distant tumor sites. In addition, the lung metastasis was also reduced by the vaccine implantation in mice. The multifunctional vaccine prepared from biomacromolecule and nature-derived material provides a biocompatible and versatile tool for re-educating TAMs and preventing postsurgical tumor recurrence." @default.
- W3204342250 created "2021-10-11" @default.
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- W3204342250 date "2021-11-01" @default.
- W3204342250 modified "2023-09-26" @default.
- W3204342250 title "Macrophage-derived implantable vaccine prevents postsurgical tumor recurrence" @default.
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- W3204342250 doi "https://doi.org/10.1016/j.biomaterials.2021.121161" @default.
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