Assay Method Information | |
| Anti-HIV-1 Activity Test |
Description: | C8166 cells infected with HIV-1 were used for determining the anti-HIV biological activity at the cellular level. The specific method was described below.Cytotoxicity experiment: The toxicity of the compounds on C8166 cells was determined by MTT method. In a 96-well cell culture plate, the compounds were subjected to 5-fold serial dilution and 100 μL of C8166 cell suspension (4×105/mL) was added into each well. Three replicate wells were set for each concentration. At the same time, a cell control group without drugs and drug control groups with Zidovudine (AZT) or Nevirapine (NVP) were set. The cells were incubated at 37° C. in a 5% CO2 incubator for three days, followed by the addition of MTT solution into each well, and then the cells were incubated at 37° C. for 4 hours. 15% SDS-50% DMF was added to each well and the cells were incubated at 37° C. in a 5% CO2 incubator overnight. After mixing evenly, the OD values were measured by BIO-TEK ELx800 ELISA instrument (determination wavelength: 570 nm; reference wavelength: 630 nm). The dose-response curve was graphed according to the experimental results, and the CC50 was calculated (the concentrations of the compounds required to produce toxicity on 50% cells).Syncytium inhibition experiment: 100 μL of C8166 cell suspension (4×105/mL) was inoculated into each well of a 96-well cell culture plate containing 5-fold serial dilutions of the compounds, followed by addition of HIV-1IIIB diluted supernatant (MOI=0.04). Three replicate wells were set for each serial concentration. At the same time, negative control wells of HIV-1IIIB infection without compounds and positive control wells with Zidovudine (AZT) or Nevirapine (NVP) were set. The cells were incubated at 37° C. in a 5% CO2 incubator for three days. The number of the syncytia was counted in five non-overlapping fields of view by using an inverted microscope (100×). The dose-response curves were graphed according to the experimental results, and the 50% effective concentrations of the compounds for inhibiting the virus (EC50, 50% effective concentration) were calculated according to Reed & Muench method. Calculation formula: cytopathic inhibition rate (%)=(1−number of syncytia in experimental wells/number of syncytia in control well)×100%. |
Affinity data for this assay | |
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