Additional file 5. Figure S4. Colocalization of 5-HT and RhoA in colon cancer cells. Immunofluorescence was performed to show that the co-expression of 5-HT and RhoA in SW480 and SW1116 cells stimulated with 10 μM 5-HT in the absence and presence of citalopram (100 μM), added 2 h before 5-HT stimulation (400×)