圆形窗体膜外细胞囊促进内耳药物输送
S Holdsclaw1, D Silkstone2, H Jeanneret3
1Department of Biological Sciences, North Carolina State University, Raleigh, NC, USA; Department of Molecular and Structural Biochemistry, North Carolina State University, Raleigh, NC, USA.
概括
来自圆窗膜的细胞外囊 (EV) 显示了改善内耳药物输送的潜力. 这些EV增强通过圆窗膜的治疗传输,为听力损失提供更安全,更有效的治疗方法.
科学领域:
- 生物医学工程
- 耳鼻喉科
- 药物输送系统
背景情况:
- 全球有超过4亿人患有听力损失,目前的治疗方法受限于无效的内耳药物输送.
- 内注射 (IT) 是最安全的方法,但由于圆窗膜 (RWM) 的限制性而面临挑战.
- 由于其固有的特性和低免疫性,来自RWM细胞的细胞外囊 (EV) 提供了增强药物输送的有希望的替代方案.
研究的目的:
- 探索RWM衍生的EV用于内耳药物输送的释放和特性.
- 评估RWM-EV在RWM中运输治疗剂的效率.
- 评估RWM-EV在临床前模型中的药物和基因治疗载体的潜力.
主要方法:
- 对RWM细胞衍生的EV及其释放途径的表征 (克拉特林介导的内细胞分裂,戈尔吉-ER传输,间隙结交易).
- 在猪RWM细胞中对RWM-EV,中干细胞 (MSC) -EV以及脂质体吸收和传递效率进行比较评估.
- 在猪体内进行甲载体RWM-EV过渡后的体内评估.
- 在HEK293T和RWM细胞中研究由大脑衍生的神经营养因子 (BDNF) 和腺相关病毒 (AAV) 负载的EV吸收和转导.
主要成果:
- 由RWM衍生的EV在猪RWM细胞中表现出高效的吸收和传递,在某些方面表现优于MSC-EV和脂质体.
- 在猪体内进行的实验证实了甲含有RWM- EV的通过.
- 载有BDNF和AAV的EV在目标细胞中表现出成功的吸收和转导能力,这表明基因疗法应用的潜力.
结论:
- 源自RWM的EV代表了改进内药物和基因治疗的新有效平台.
- 这种方法克服了RWM障碍的局限性,为治疗内耳疾病提供了更安全,更有效的途径.
- 以RWM-EV为基础的治疗方法的进一步开发对提高听力损失和其他耳疾病的临床治疗具有显著的前景.
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