Fig. 1

4-HIL is non-toxic to the co-culture system. The RAW264.7 cells and 3 T3-L1 cells or co-culture system were treated with 4-HIL (20 μM) and LPS (100 ng/ml) for 6 h. a The cell viability of 3 T3-L1 cells. b The cell viability of RAW264.7 cells. c The cell viability of RAW264.7 in co-culture system