Fig. 6.
Effect of PMA and TPO on PGI2-R expression. HEL () and NS-Meg (▪) cells were preincubated for 48 hours with or without (control) either PMA or TPO. PGI2-R expression was evaluated by specific [3H]iloprost binding to the cells. Values (mean ± SE, n = 4) are expressed as a ratio of scintillation count of the control cells (nontreated HEL, 1.3 × 105 ± 5.3 × 103 dpm/1 × 106 cells, nontreated NS-Meg, 4.2 × 104 ± 3.9 × 103). Preincubation with PMA or TPO increased the binding capacity of the ligand up to sixfold and threefold in HEL cells and fivefold and twofold in NS-Meg cells, respectively, when compared with control values. The experiment is representative of three performed.