title: The effects of fractionated and unfractionated heparins with and without aprotinin on plasma inhibition of alpha and beta FX11a.
abstract: Chromogenic peptide substrate assays were used to compare the effects of fractionated and unfractionated heparins on plasma inhibition of alpha and beta FX11a, with and without various concentrations of aprotinin. All of the heparins reduced beta FX11a inhibition at 1 or 2U/ml. Four heparins increased alpha FX11a inhibition. Aprotinin counteracted the reduction in beta FX11a inhibition and augmented the heparin potentiation of alpha FX11a inhibition.
mesh_terms: D007611:Aprotinin / Q000494:pharmacology*; D004347:Drug Interactions; D015945:Factor XIa / Q000037:antagonists & inhibitors*; D006493:Heparin / Q000302:isolation & purification / Q000494:pharmacology*; D006801:Humans; D007700:Kinetics; D008970:Molecular Weight
chemical_list: D006493:Heparin; D007611:Aprotinin; D015945:Factor XIa