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A bionic "Trojan horse"-like gene delivery system hybridized with tumor and macrophage cell membrane for cancer therapy.
Journal of Controlled Release 2023 April 29
MiRNA-based gene therapy as a novel targeted therapy has yielded promising results in experimental cancer treatment, however, the inefficient delivery of miRNA to target tissues has limited its application in vivo. Here a unique dual-membrane-camouflaged miRNA21 antagomir delivery nanoplatform (M@NPs/miR21) with immune escape and homologous targeting properties was constructed by cancer cell membrane and macrophage membrane. Different from the single-cell membrane camouflage strategy, the dual-membrane camouflage miRNA21 antagomir delivery nanoplatform based on modification of CD47 protein with immune escape signal and galectin-3 protein with tumor cell aggregation enables efficient, safe and targeted therapy for colon cancer and lung metastases. Camouflaged with the dual-cell membrane, the "Trojan horse" like "pseudo-tumor cell" and/or "pseudo-macrophage" (M@NPs/miR21) carried the target gene miR21 antagomir to the tumor site and showed significant anti-tumor properties at the periphery and the core of subcutaneous tumor tissues. In addition, M@NPs/miR21 was more likely to penetrate dense tumor tissues and function within the tumor mass than NPs/miR21 without membrane coating. M@NPs/miR21 can deliver miR21 antagomir into MC38 cancer cells and tumor tissues, promote tumor apoptosis, and regulate the expression of Bcl2 and Ki67. Moreover, the M@NPs/miR21 gene delivery system not only can effectively inhibit the progression of subcutaneous tumors and lung metastases, but also showed minimal toxicity and good biosafety, making this delivery system particularly attractive for future translational research.
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