Bio-inspired bioactive glasses for efficient microRNA and drug delivery. uri icon

abstract

  • Bio-inspired pinecone-like bioactive glasses consisting of ordered thin-layers separated by consistent cavities were synthesized using a sol-gel process. The short diameter of the as-produced particles was as short as 161 nm, and the surface area was as high as 280 m2 g-1. The pore volume, ranging from 0.74 cm3 g-1 to 0.67 cm3 g-1, could be modulated by the aqueous ammonia concentration. The surface was further tailored for positive charges by amino grafting. The as-produced nanoparticles could successfully enter cells via endocytosis. The microRNA delivery of the bioactive glass particles was further investigated by fluorescence microscopy and flow cytometry, indicating a loading efficiency and transfection efficiency greater than 90%. The potential of such particles as drug carriers was also studied. CCK8, live-dead cell staining and PI/annexinV double staining analyses confirmed that the bioactive glass particles loaded with antitumour doxorubicin (DOX) significantly accelerated the apoptosis of tumour cells. These bio-inspired bioactive glasses are promising as novel vectors for drug and microRNA delivery with high efficiency.

published proceedings

  • J Mater Chem B

author list (cited authors)

  • Li, X., Liang, Q., Zhang, W., Li, Y., Ye, J., Zhao, F., Chen, X., & Wang, S.

complete list of authors

  • Li, Xian||Liang, Qiming||Zhang, Wen||Li, Yuli||Ye, Jiandong||Zhao, Fujian||Chen, Xiaofeng||Wang, Shiren