I am trying to establish an inflammatory injury model in HK-2 cells using LPS stimulation, but I've encountered some issues.
I treated the HK-2 cells with a range of LPS concentrations (0, 1, 2, 5, 10, 20, and 50 µg/ml) in 1% FBS medium for 24 hours. However, the CCK-8 assay showed no significant differences in cell viability across the groups.
Has anyone encountered a similar situation, or does anyone have suggestions on optimizing the model? Could it be related to serum concentration, LPS batch, or cell sensitivity?