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211217: ½ð±Ò+10 2015-03-09 16:30:22
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4.2.1 Cytotoxicity assay:
HEp-2 cells grown in exponential phase were trypsinized  and dispersed into single cell suspension and seeded into 96-well plates, cultured for 24 hrs at 37 ¡æ£¬5% CO2. The next day, the culture medium was removed and replaced with medium containing various concentration of drug in quadruplicates with medium alone as the control group. Cells were monitored daily under an invert light microscope for obvious morphological changes. 48hr later, MTT assays were conducted to determine the cell viability. Each experiment was repeated 3 times.  By using probability unit method, the half maximal toxicity concentrations (CC50) were estimated, furthermore, based on cell viability results, the maximal non-toxicity dose ranges were identified.
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4.2.1 Cytotoxicity assay:
HEp-2 cells grown in exponential phase were trypsinized  and dispersed into single cell suspension and seeded into 96-well plates, cultured for 24 hrs at 37 ¡æ£¬5% CO2. Next day, the culture medium was removed and replaced with medium containing various concentrations of the drug in quadruplicates with medium alone as the control group. Cells were monitored daily under an invert light microscope for obvious morphological changes. 48hr later, MTT assays were conducted to determine cell viability. Each experiment was repeated 3 times.  By using probability unit method, the half maximal toxicity concentrations (CC50) were estimated, furthermore, based on cell viability results, the maximal non-toxic dose ranges were identified.
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