Abstract Aim In this study, 5-fluorouracil (5-FU) is delivered to target colon without the interference of mononuclear phagocyte system (MPS). Methods Outer membrane vesicles (OMVs) were used as the biological… Click to show full abstract
Abstract Aim In this study, 5-fluorouracil (5-FU) is delivered to target colon without the interference of mononuclear phagocyte system (MPS). Methods Outer membrane vesicles (OMVs) were used as the biological shield to disguise mesoporous silica (MSN) and 5-FU. OMVs-MSN-5-FU were prepared by high pressure co-extrusion, and characterised on the basis of size, drug loading, transmission electron microscope, infra-red spectroscopy, differential scanning calorimetry, thermal gravity analysis, % in vitro release, MTT assay, cell uptake and in vivo imaging. Results OMVs-MSN-5-FU with −18.22 ± 0.17 mV zeta potential and 90.4 ± 9.1 nm size were used for oral treatment of colon cancer. Drug loading of the drug was 50.22%±0.17 (w/w). The cumulative release of OMVs-MSN-5-FU reached 75.07%±0.94 in tumour microenvironment. The percentage of cell viability of OMVs-MSN-5-FU was 33.75%±2.73. In vivo experiments results confirmed that OMVs-MSN-5-FU could be taken up by colon cancer cells. Conclusions The study provided a promising nano platform for the targeting treatment of colon cancer.
               
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