半孔性二氧化纳米粒子用于细胞内输送膜不透的蛋白质
Igor I Slowing1, Brian G Trewyn, Victor S-Y Lin
1Department of Chemistry, U.S. DOE Ames Laboratory, Iowa State University, Ames, Iowa 50011-3111, USA.
Journal of the American Chemical Society
|June 26, 2007
概括
半孔性二氧化纳米粒子 (MSN) 能够有效地将功能性细胞染色体c输入癌细胞. 这些大型毛孔的MSN显示出蛋白质治疗和细胞代谢操纵的潜力.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术 纳米技术
- 细胞生物学 细胞生物学
背景情况:
- 细胞染色体c是细胞呼吸的关键蛋白质,但是细胞膜不透的.
- 半孔纳米颗粒 (MSN) 由于其可调节的孔径大小和高表面积,具有药物和蛋白质输送的潜力.
- 开发有效的蛋白质输送系统进入活细胞是生物技术的一个重大挑战.
研究的目的:
- 为了合成和描述MCM-41型MSN的大孔直径.
- 调查这些MSN体外摄取和释放的细胞染色体c.
- 评估释放的细胞染色体c的功能活性及其传递到活癌细胞中的情况.
主要方法:
- 合成和表征MCM-41型中孔性二氧化纳米颗粒 (MSNs) 的平均孔径为5.4nm.
- 在体外研究MSN的细胞染色体c的吸收和释放动力学.
- 使用ABTS和过氧化,对释放的cytochrome c的酶活性进行定量分析.
- 使用活人宫癌细胞 (HeLa) 评估细胞质输送的细胞内化研究.
主要成果:
- 具有大孔径 (5.4 nm) 的MSN成功合成和表征.
- 细胞染色体c在体外有效地被封装并从MSN中释放出来.
- 释放的cytochrome c保留了其酶活性,与原生cytochrome c相比.
- 带有细胞染色体c的MSN被HeLa细胞内部化,随后功能性细胞染色体c释放到细胞质中.
结论:
- 大孔的MSN可以作为有效的载体,将功能性,膜不透的蛋白质如cytochromec输送到活细胞中.
- 这种传递系统表明了跨膜蛋白传递的潜力,使其在治疗和细胞代谢工程中的应用成为可能.
- 这些发现为开发基于蛋白质的新生物技术工具和疗法打开了道路.
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