Fig. 4.
Effect of HLE and Cat G on EC activation induced by thrombin or TRAP42-55. (A) [Ca2+]i was determined in fura 2-loaded IVECs in suspension preincubated for 5 minutes with 600 nmol/L Cat G or HLE before stimulation with 1 nmol/L thrombin () or 12.5 μmol/L TRAP42-55 (▨). (B) PGI2 synthesis was measured from supernatants of confluent HUVEC monolayers preincubated for 30 minutes with 50 nmol/L HLE or Cat G before stimulation with a similar concentration of the same agonists. Data are expressed as the percentage of the control values (no preincubation with HLE or Cat G). Each histogram is the mean ± SEM of three to four distinct experiments.