2.3.7. Cytotoxicity assays
The stock solutions of RATU (30, 45 and 60 mM) were prepared in CH CN. sf-9 cells (1mL, 1 104 cells per dish) in culture media
3 ×
TC-100 with 10% foetal bovine serum were cultured in each of 12 culture dishes for 24 h at 27 ◦C and separated into four groups. Group 1 was left as the control. Group 2, 3 and 4 were induced 30, 45 and 60 mM of RATU (1 L) respectively. The cells were incubated at 27 ◦C for another 24 h. Then, Muse detection reagent was added into the cells away from light. After 5 min the percentage of live cells in total cells was tested automatically by a MUSE Smart Touch cell analyzer. The viability was expressed as the percentage compared with the control.