Cell viability analysis
Hep G2 cells were seeded in 96-well plates at a density of 2.0 × 105 cells/well. After incubation for 8 h, the medium was removed and replaced by 20 μL of different concentrations of ACE polysaccharides, ACE/ES, ACE/S and nanoparticles without loading, which were suspended in deionized water and ultrasonicated for 1 h to prevent agglomeration. Controls were cells treated with an equivalent volume of serum-free medium instead of suspensions. Cells were further incubated for 24 h or 48 h and viability was assessed by using an MTT (3-(4, 5-dimethylthiazol-2-yl)-2, 5-di-phenyltetrazolium bromide) test [26]. In brief, fresh media with 100 μL of 5 mg/mL MTT stain (Sigma-Aldrich in vitro toxicology assay kit) was added into each well and incubated for 4 h. The media/stain was drawn out and purple color crystals were dissolved using acidic isopropyl alcohol. The absorbance in each well was measured at 570 nm using a 4294B Microplate Reader (Tecan Sunrise, American Instrument Exchange Inc. USA). All experiments were repeated 3 times independently to ensure reproducibility and data were acquired in triplicate (n = 3). Cell viability was calculated with the following formula:
Cell viability analysisHep G2 cells were seeded in 96-well plates at a density of 2.0 × 105 cells/well. After incubation for 8 h, the medium was removed and replaced by 20 μL of different concentrations of ACE polysaccharides, ACE/ES, ACE/S and nanoparticles without loading, which were suspended in deionized water and ultrasonicated for 1 h to prevent agglomeration. Controls were cells treated with an equivalent volume of serum-free medium instead of suspensions. Cells were further incubated for 24 h or 48 h and viability was assessed by using an MTT (3-(4, 5-dimethylthiazol-2-yl)-2, 5-di-phenyltetrazolium bromide) test [26]. In brief, fresh media with 100 μL of 5 mg/mL MTT stain (Sigma-Aldrich in vitro toxicology assay kit) was added into each well and incubated for 4 h. The media/stain was drawn out and purple color crystals were dissolved using acidic isopropyl alcohol. The absorbance in each well was measured at 570 nm using a 4294B Microplate Reader (Tecan Sunrise, American Instrument Exchange Inc. USA). All experiments were repeated 3 times independently to ensure reproducibility and data were acquired in triplicate (n = 3). Cell viability was calculated with the following formula:
การแปล กรุณารอสักครู่..
