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在iRGD工程外体中介于siMYC传递,以有效抑制三阴性乳腺癌的瘤
Hui Li1, Weiguang Yuan2,3, Jialin Liu4,5,6
1Department of Ultrasound, The First Affiliated Hospital of Harbin Medical University, Harbin, China.
Nanoscale
|December 12, 2025
概括
携带治疗性RNA的工程外体有效向并治疗三阴性乳腺癌. 这种新的外体细胞递送系统增强了基因沉默,并减少了瘤的生长,毒性最小.
科学领域:
- 生物医学工程 生物医学工程
- 纳米医学是一种纳米医学.
- 癌症治疗 癌症治疗
背景情况:
- 三阴性乳腺癌 (TNBC) 具有侵略性,治疗选择有限.
- MYC过度表达是TNBC进展的关键驱动因素.
- 针对MYC的小干扰RNA (siRNA) 等治疗剂的有效输送具有挑战性.
研究的目的:
- 用内部化RGD (iRGD) 修改的外体进行工程,以增强siMYC向TNBC细胞的传递.
- 在临床前模型中评估载有siMYC (iRGD-Exos-siMYC) 的iRGD外体的治疗疗效和生物安全性.
主要方法:
- 通过使用iRGD-Flag-Lamp2b等离子体对293-F细胞进行转移,进行了工程外体 (iRGD-Exos).
- 通过电穿孔将负载的siMYC输入到外体.
- 在TNBC异种移植小鼠模型中评估了外基因组吸收,TNBC细胞增殖,亡 (体外和患者衍生器官),瘤向和治疗效应.
- 通过血液学,生化学和组织病理学分析评估系统性毒性.
主要成果:
- iRGD修改显著增加了表达αvβ3整合素的TNBC细胞对外体的吸收.
- iRGD-Exos-siMYC有效地抑制了TNBC细胞增殖和诱导的细胞亡在体外和患者衍生器官.
- 在体内研究表明优异的瘤向,显著的瘤生长抑制和MYC表达下调.
- 系统性毒性评估证实了工程外体的良好生物安全性.
结论:
- 经iRGD修饰的外体作为一个有效的平台,可以将siMYC传递给TNBC细胞,增强基因沉默和抗瘤功效.
- 这种向的外体药物递送系统表现出高瘤选择性和最小的全身毒性.
- iRGD-Exos-siMYC代表了对三阴性乳腺癌的有前途的新疗法策略.
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