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Efficient Colorectal Cancer Gene Therapy with IL-15 mRNA Nanoformulation.
Molecular Pharmaceutics ( IF 4.5 ) Pub Date : 2020-08-10 , DOI: 10.1021/acs.molpharmaceut.0c00451
Sibei Lei 1 , Xueyan Zhang 1 , Ke Men 1 , Yan Gao 1 , Xijing Yang 2 , Sisi Wu 1 , Xingmei Duan 3 , Yuquan Wei 1 , Rongsheng Tong 3
Affiliation  

Immunogene therapy is a novel method for the treatment of colorectal cancer. Cytokine IL-15 has exhibited therapeutic anticancer potential due to its immune-stimulation property. However, conventional IL-15-based cancer gene therapy studies have been performed using the plasmid DNA form, which has potential shortcomings including weak delivery efficiency and backbone effect. In this study, an IL-15 immunogene therapy study for colon cancer using in vitro transcript mRNA is described. A protamine/liposome system (CLPP) is developed to provide efficient condensation and delivery capacity for in vivo mRNA transportation. They demonstrated that the prepared CLPP system could deliver the IL-15-encoding mRNA into C26 cells with high efficacy. The secretory expressed IL-15 cytokine by the C26 cells successfully produced lymphocyte stimulation and triggered anticancer cytotoxicity upon cancer cells in vitro. Local or systemic administration of the CLPP/mIL-15 complex exhibited obvious inhibition effects on multiple C26 murine colon cancer models with inhibition rates of up to 70% in the C26 abdominal cavity metastasis tumor model, 55% in the subcutaneous model, and 69% in the pulmonary metastasis model, demonstrating high efficacy and safety. These results successfully demonstrated the high therapeutic potential of the CLPP/mIL-15 complex for colorectal cancer immunogene therapy.

中文翻译:

IL-15 mRNA纳米配方的有效结直肠癌基因治疗。

免疫原疗法是一种治疗结直肠癌的新方法。细胞因子IL-15由于其免疫刺激特性而显示出治疗性抗癌潜力。然而,已经使用质粒DNA形式进行了常规的基于IL-15的癌症基因治疗研究,其具有潜在的缺点,包括较弱的递送效率和骨架作用。在这项研究中,描述了使用体外转录mRNA进行结肠癌的IL-15免疫基因治疗研究。开发了一种鱼精蛋白/脂质体系统(CLPP),可为体内提供有效的凝结和输送能力mRNA运输。他们证明了制备的CLPP系统可以将IL-15编码的mRNA高效地传递到C26细胞中。分泌表达由C26细胞中成功产生淋巴细胞刺激IL-15的细胞因子和时触发癌细胞的抗癌细胞毒性在体外。CLPP / mIL-15复合物的局部或全身给药对多种C26鼠结肠癌模型显示出明显的抑制作用,在C26腹腔转移瘤模型中的抑制率高达70%,在皮下模型中的抑制率高达55%,在皮下模型中的抑制率高达69%在肺转移模型中显示出高疗效和安全性。这些结果成功地证明了CLPP / mIL-15复合物在大肠癌免疫基因治疗中的高治疗潜力。
更新日期:2020-09-09
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