title: Apparent antihaemophilic activity of basic amphoteric polyelectrolytes.
abstract: Amphoteric polyelectrolytes with alkaline isoelectric points (for example Ampholine 9-11) intended for use in isoelectric focussing were found to shorten the prolonged partial thrombosplastin clotting time with kaolin (PTTK) of plasma deficient in factor VIII. The response of this PTTK to Ampholine 9-11 was linear when plotted on double log paper with a slope slightly greater than that of factor VIII itself. Ampholine 9-11 at 2% concentration had factor VIII and factor IX activity equal to that of normal plasma as well as somewhat less activity as factor XI. It had no significant correcting effect on the clotting of plasmas deficient in factors V, VII, X, II OR XII. Ampholine 9-11 inhibited low concentrations of contact activators and its effect in correcting factor VIII deficient plasma was found to be related to the degree of contact activation.
mesh_terms: D000596:Amino Acids / Q000008:administration & dosage / Q000494:pharmacology*; D001777:Blood Coagulation / Q000187:drug effects*; D001778:Blood Coagulation Disorders / Q000097:blood; D004305:Dose-Response Relationship, Drug; D006467:Hemophilia A / Q000097:blood*; D006801:Humans; D066298:In Vitro Techniques; D007526:Isoelectric Point; D007616:Kaolin / Q000008:administration & dosage
chemical_list: D000596:Amino Acids; D007616:Kaolin