Figure 5.
The effects of each compound on the phosphorylation of IRS1 in 3T3-L1 cells during 30 min after the addition of each compound. Protein levels were measured by electroblotting. Undifferentiated cells, cells with the addition of MDI (a mixture of 0.5 mM 3-isobutyl-1-methyl- xanthine (M), 0.1 μM dexamethasone (D), and 2 μM insulin (I)), rosiglitazone, berberine, and vitexilactone are indicated by CTRL, MDI, ROS, BER, and V, respectively. → and ↓ represent no change or down-regulation, respectively.