A bio-immuno assay to determine free tissue-type plasminogen activator (t-PA) in Stabilyte® plasma

This article describes a two-step bio-immuno assay (BIA), which determines active (free) tissue-type plasminogen activator (t-PA) in (acidified) plasma. Plasma samples, diluted in buffer of pH 6.0, are added to the wells of a microtiter plate containing an immobilised monoclonal antibody which binds t-PA without affecting t-PA activity. After an...

New aspects of blood collection and handling procedures for the assessment of t-PA and PAI-1 variables after the introduction of acid blood collection

Blood collection and handling procedures for t-PA activity have thusfar been rather strict and have restrained the use in clinical practice. We evaluated simplifications in the procedures for specifically the use of Stabilyte® vacutainers with respect to time before centrifugation of blood, storage of plasma, times of inversion of the collection...