免疫系统
免疫疗法
基因传递
癌症免疫疗法
癌症研究
小圆圈
遗传增强
膀胱癌
质粒
胞外囊泡
细胞外
生物
微泡
化学
癌症
免疫学
细胞生物学
小RNA
基因
生物化学
遗传学
作者
Zhiyuan Wu,Wei Li,Melissa Tan,Faith Yuan Xin How,Haripriya Sadhasivan,Ratha Mahendran,Qinghui Wu,Edmund Chiong,Minh T. N. Le
摘要
Abstract Interleukin‐12 (IL‐12) holds significant potential in cancer therapy; however, its clinical applicability is hindered by dose‐limiting toxicity. Delivery of the IL‐12 gene directly to tumours for constitutive IL‐12 expression is a possible strategy to enhance its effectiveness while minimizing systemic toxicity. In this study, we investigate the potential of red blood cell‐derived extracellular vesicles (RBCEVs) as a carrier for Il‐12 plasmid delivery. We demonstrate that RBCEVs can be loaded with minicircle plasmid encoding IL‐12 and delivered to MB49 bladder cancer cells for IL‐12 expression. The expression of transgenes from minicircles was significantly higher than from the parental plasmids. RBCEV‐mediated IL‐12 expression stimulated immune responses in mouse splenocytes. Intratumoral delivery of Il‐12 plasmid‐loaded RBCEVs suppressed bladder cancer tumour growth, stimulated immune responses and promoted immune cell infiltration. In conclusion, our study demonstrates the promising potential of RBCEVs as an effective, safe and redosable nucleic acid drug delivery platform for IL‐12.
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