RESUMO
Anticoagulant effects of 12 short peptides of the glyproline series - Arg-Glu-Arg-Pro-Gly-Pro (RERPGP), Arg-Glu-Arg-Val-Gly-Pro (RERVGP), Arg-Glu-Arg-Gly-Pro (RERGP), Arg-Pro-Gly-Pro (RPGP), Pro-Leu-Pro (PLP), Pro-Leu-Pro-Ala (PLPA), Pro-Gly-Pro-Leu (PGPL), Phe-Pro-Leu-Pro-Ala (FPLPA), Pyr-Arg-Pro (PyrRP), Lys-Lys-Arg-Arg-Pro-Gly-Pro (KKRRPGP), Arg-Lys-Lys-Arg-Pro-Gly-Pro (RKKRPGP), and Lys-Arg-Lys-Pro-Gly-Pro (KRKPGP) in concentrations of 10-3 and 10-2 mg/ml in vitro was demonstrated by the thromboelastographic method. The effects of 6 peptides ((RERPGP, RPGP, PLP, PLPA, RKKRPGP, and KKRRPGP) were also observed in vivo after intranasal or oral administration. Changes in the studied thromboelastographic parameters towards hypocoagulation in comparison with the control group were noted. Arginine and leucine glyprolines produced the maximum anticoagulant effect.
Assuntos
Anticoagulantes/sangue , Arginina/química , Leucina/química , Lisina/química , Oligopeptídeos/sangue , Administração Intranasal , Administração Oral , Sequência de Aminoácidos , Animais , Anticoagulantes/síntese química , Masculino , Oligopeptídeos/síntese química , Tempo de Tromboplastina Parcial , Ratos , Tromboelastografia/métodos , Tempo de Coagulação do Sangue TotalRESUMO
Thromboelastography revealed anticoagulant effects of 3 glyproline oligopeptides (in various concentrations): His-Phe-Arg-Trp-Pro-Gly-Pro, Thr-Lys-Pro-Arg-Pro-Gly-Pro (Selank), and Pro-Gly-Pro. The parameters R, K, MA, S, TMA, and J changed to hypocoagulation direction in comparison to the control. At this, Selank demonstrated the maximal anticoagulation potency.
