| Background: Nano-therapy has the potential to revolutionize cancer therapy. Chrysin, a natural flavonoid,
was recently recognized as having important biological roles in chemical defenses and nitrogen fixation, with
anti-inflammatory and anti-oxidant effects but the poor water solubility of flavonoids limitstheir bioavailability
and biomedical applications. Objective: Chrysin loaded PLGA-PEG-PLGA was assessed for improvement of
solubility, drug tolerance and adverse effects and accumulation in a gastric cancer cell line (AGS). Materials and
Methods: Chrysin loaded PLGA-PEG copolymers were prepared using the double emulsion method (W/O/W).
The morphology and size distributions of the prepared PLGA-PEG nanospheres were investigated by 1H NMR,
FT-IR and SEM. The in vitro cytotoxicity of pure and nano-chrysin was tested by MTT assay and miR-34a
was measured by real-time PCR. Results: 1H NMR, FT-IR and SEM confirmed the PLGA-PEG structure and
chrysin loaded on nanoparticles. The MTT results for different concentrations of chrysin at different times for
the treatment of AGS cell line showed IC50 values of 68.2, 56.2 and 42.3 µM and 58.2, 44.2, 36.8 µM after 24,
48, and 72 hours of treatment, respectively for chrysin itslef and chrysin-loaded nanoparticles. The results of
real time PCR showed that expression of miR-34a was upregulated to a greater extent via nano chrysin rather
than free chrysin. Conclusions: Our study demonstrates chrysin loaded PLGA-PEG promises a natural and
efficient system for anticancer drug delivery to fight gastric cancer. |