Assay Method Information

Assay Name:  Immumoenzymatic Assay
Description:  Solutions of the tested compounds in DMEM medium {DMEM) 1x; Source: Cellgro; Catalogue: 10-013-CV} were prepared immediately before use. Eleven serial three fold dilutions with variation of concentrations from 20 nM to 0.2 pM were prepared. In 4 hours after seeding, serial dilutions of the compounds were added to the cells (100 ul to each well). Final concentration of tested compounds was varied from 10 nM to 0.1 pM, and DMSO4 0.5%. If it was necessary, higher concentrations of the disclosed azoles were investigated. Each dilution of the compound was tested on two identical wells. Then the cells were incubated for three days at 37° C./5% CO2 and fixed by addition of acetone/methanol (1:1) mixture in amount of 250 ul/well. In 1 min the cells were washed 3 times with PBS (Phosphate Buffered Saline) solution. Then the cells were blocked by addition of 10% fetal calf serum in PBS solution in amount of 150 ul/well for 1 h at room temperature. Then, the cells were incubated with mouse monoclonal antibodies to cor-antigen HCV, don C7-50 (Source: Affinity BioReagents; Catalogue: MA1-080) (100 ul/well, working dilution 1:500 in 10% fetal calf serum in PBS solution) for 2 h at 37° C. The cells were washed 6 times with PBS/0.05% Tween 20 solution, then, they were incubated for 1 h with goat anti-mouse immunoglobulin antibodies (conjugated with horseradish peroxidase, 100 ul/well, working dilution 1:2500 in 10% fetal calf serum in PBS solution). The cells were washed 6 times with PBS/0.05% Tween 20 solution, once with PBS solution, after that substrate (1 tablet of o-phenylenediamine (oPD)+12 ml citrate/phosphate buffer+5 ul 30% H2O2) in amount of 100 ul/well was added. The plates were kept for 30 min in the dark at room temperature. The reaction was arrested by the addition of 2N H2SO4 in amount of 100 ul/well, and optical density (wavelength 490 nm) was measured by means of multiscan plate reader Victor3 V 1420 (Perkin Elmer). IC50 values (azole concentration, lowering the level of virus RNA-replicon on 50%) for every tested azole were calculated with the help of XLfit 4 program.
Affinity data for this assay
 

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