Prostaglandin E1 because of its unique protective and repaired endothelial action is used in the treatment of many diseases. The aim of the study was the investigation of prostaglandin E1 influence on some adhesive molecules profile in the patients with thrombangitis obliterans. 21 patients, aged 31-49 years (mean 40.3 +/- 5.3), with thrombangitis obliterans were observed. The control group consisted of 22 healthy patients, aged 18-50 years (mean 34.6 +/- 12.25 years). In both groups as well the number of circulated endothelial cells and selectin L, P, E and vWF factor concentration were measured. In patients suffered from thrombangitis obliterans these parameters were measured before and after 21 days intraarterial 10 mg PGE1 (Alprostadil) infusion. No PGE1 influence on selectin E concentration was observed, the mean values as well before as after the treatment were equal to 66.56 +/- 8.92 ng/ml. The decrease in selectin P concentration was observed but the difference was not statistically significant. The statistically significant reduction was observed in selectin L (decrease from 799.88 +/- 104.79 ng/ml to 764.83 +/- 116.04 ng/ml) and vWF concentration (decrease from 195.04% +/- 26.2% to 187.69% +/- 22.83%). The final PGE1 therapeutic result was the circulating endothelial cells decrease (from 2.47 +/- 1.01 before to 2.36 +/- 0.97 cells/ml after treatment). Intraarterial PGE1 infusion in patients with thrombangitis obliterans results in significant selectin L, vWF factor concentration decrease less; this decrease is less marked in selectin P concentration. As the inhibition of the adhesive molecules activation effect the number of exfoliated circulated endothelial cells decrease is observed.