Figure 1:

Fluorescent microscopy images (40x) of HMGECs stained with primary antibodies against PGE₂ (EP1, EP2, EP3, or EP4) or PGF_2α (FP) receptors and counterstained with DAPI (blue) after 24 hours of culture in differentiation media containing DMEM/F12, 10 ng/ml EGF, 2% FBS, and 50 μM rosiglitazone. Positive signal for each primary antibody (pseudocolored red) was detected for EP1, EP2, EP4, and FP receptors.

PGE₂: prostaglandin E₂

PGF_2α: prostaglandin F_2α