Summary
Influence of SKPL on platelet function tests has been studied.
1. Human platelets suspended in borate buffer lose after SKPL treatment the ability
to aggregate under the influence of thrombin, ADP and connective tissue extract.
2. Washed platelets incubated with SKPL did not influence the thrombin time of prothrombin
free plasma.
3. The digestion of platelet rich plasma with SKPL diminished the ability of platelets
to aggregate under the influence of thrombin, ADP and connective tissue extract and
the adhesiveness to glass.
4. Viscous metamorphosis after addition of thrombin or ADP was delayed and less advanced
in SKPL treated platelet rich plasma as compared with control undigested plasma.
5. The addition of FDP preparation to platelet suspension or to platelet rich plasma
impaired their ability to aggregate under the influence of thrombin, ADP and connective
tissue extract.
6. Adhesiveness of platelets to glass in the whole blood containing FDP was decreased
in comparison with controls.
7. FDP inhibits also the adhesion of platelets from platelet rich plasma to connective
tissue fibers (collagen).
8. Viscous metamorphosis induced by thrombin, ADP or connective tissue extract in
platelet rich plasma could be delayed or inhibited by addition of FDP.
9. Inhibiting effect of FDP on platelet functions were dependent on concentration
of FDP and aggregating agent. FDP influence platelet functions in such concentration
which inhibit significantly the thrombin time. Increase of the concentration of the
inducing agent can overcome the inhibitory effects of FDP.
10. The significance of the described findings for the hemostatic function of platelets
is discussed.