Platelet adhesion and complement activation studies on poly(N-alkyl mono and disubstituted) acrylamide derivatives

Poly(N-alkyl mono and disubstituted) acrylamide derivatives were synthesize d from poly(acryloyl chloride) by monomer analogous reaction. The polymers were characterized by FTIR-ATR and GPC. The contact angle measurements were performed to evaluate hydrophobic/hydrophilic characters of these polymers . The N-alkyl substituents changed contact angle between 55 and 75 degrees. In vitro platelet adhesion studies showed that surfaces of poly(N-alkyl su bstituted) acrylamides are prone to adhere platelets. Platelet spreading wa s more on poly(N-benzyl-N-ethyl acrylamide) surfaces in comparison to that on poly(N-benzyl-N-propionic acid ethyl eater acrylamide) and poly(hi-benzy l acrylamide) surfaces. As a result of modification of amino group with N-a lkyl substituents, the activations of C3a and C5a complements were suppress ed 9-20% and 5-6% of native poly(acrylamides), respectively. (C) 1999 Elsev ier Science Ltd. All rights reserved.