Chitosan-coated Zn-metal-organic framework nanocomposites for effective targeted delivery of LNA-antisense miR-224 to colon tumor: in vitro studies.

Gene Therapy
Negin MokriMehrdad Hashemi

Abstract

Nowadays, nano-compartments are considered as an effective drug delivery system (DDS) for cancer therapy. Targeted delivery of therapeutic agents is an advantageous approach by which cancer cells can be targeted without harming normal cells, and eliminates the negative effects of conventional therapies such as chemotherapy. In this research, a novel zinc-based nanoscale metal-organic framework (Zn-NMOF) coated with folic acid (FA) functionalized chitosan (CS) has been constructed and applied as efficient delivery of LNA (locked nucleic acid)-antisense miR-224 to colon cancer cell lines. LNA-antisense miR-224 as a therapeutic sequence was able to considerably block highly expressed miR-224 and downregulated cancer cell growth. The prepared nano-complex was characterized by analytical devices such as FT-IR, UV-Vis spectrophotometry, DLS, TEM, and XRD. The size range of NMOF-CS-FA-LNA-antisense miR-224 (MCFL224) nano-complex was obtained nearly at 200 nm. The entrapment efficiency of LNA-antisense miR-224 was calculated 72 ± 5% and a significant release profile of LNA-antisense miR-224 was observed at first 6 h (about 50%). Then, in vitro assays were implemented on HCT116 (folic acid receptor-positive colon cancer cell line) and C...Continue Reading

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