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| | Stabilization of HIF-1alpha |
| Description: | The compounds were formulated with DMSO to form 30 mM stock solutions, and then formulated with analytical nutrient solution to form 2× working solutions, and seven final concentrations, 0.03, 0.1, 0.3, 1, 3, 10, 30 μM, were used for screening and obtaining dose-effect relationship. Positive compound bipyridine was formulated with DMSO to form 100 mM mother solution, and then formulated with analytical nutrient solution to form 2× working solution. The positive compound bipyridine in final concentration of 100 μM was used as control, and analytic nutrient solution with DMSO in a final concentration of 3 was used as solvent control.CHOhIR cells (purchased from Thermo Fisher Scientific) which stably expressed EGFP-HIF-1α fusion protein were cultured under 37° C. and 5% CO2 in F12 culture solution containing 0.5 mg/ml G418 and 10% FBS, transplanted in an amount of 0.8×104 cells/100 μl/well on a 96-well culture plate that could be subjected to fluorescence detection, and cultured under 37° C. and 5% CO2 for 18-24 h. The cells were washed with analytical nutritional solution in amount of 100 μl/well, added with analytical nutritional solution in amount of 100 μl/well, added with 2× drug in amount of 100 μl/well, and each concentration was repeated in 3 wells in parallel way. After the cells were incubated under 37° C. and 5% CO2 for 3 h, 12% formaldehyde in amount of 100 μl/well was added, fixation was carried out at room temperature for 30 min. Culture media was discarded, and the plate was washed with PBS twice, PBS containing 1 μM Hoechst was used, staining was performed at room temperature for 1 h. Detection was performed by IN Cell Analyzer 1000 live cell imaging system. Detection conditions were: 20× objective lens, excitation wavelength Ex=460 nm, emission wavelength Em=535 nm, exposure 300 ms to detect blue-fluorescence of cell nucleus passage; excitation wavelength Ex=475 nm, emission wavelength Em=535 nm, exposure 500 ms to detect green-fluorescence EGFP of cytoplasm passage, and pictures were taken continuously in 5 fields of view for each well. IN Cell Analyzer 1000 Multitarget Analysis Module of GE Company was used for analyzing aggregation of green-fluorescence of HIF-1α in cell nucleus, and BP100 μM treatment group was used as 100% activation of HIF-1α. |
| Affinity data for this assay | |
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