ABSTRACT
Designing innovative materials for biomedical applications is desired to prevent surface fouling and risk of associated infections arising in the surgical care patient. In the present study, albumin plastic was fabricated and nitric oxide (NO) donor, S-nitroso-N-acetylpenicillamine (SNAP), was incorporated through a solvent swelling process. The albumin-SNAP plastic was evaluated in terms of mechanical and thermal properties, and bacterial adhesion to the plastic surface. Thermal and viscoelastic analyses showed no significant difference between albumin-SNAP plastics and pure, water-plasticized albumin samples. Bacteria adhesion tests revealed that albumin-SNAP plastic can significantly reduce the surface-bound viable gram-positive Staphylococcus aureus and gram-negative Pseudomonas aeruginosa bacterial cells by 98.7 and 98.5%, respectively, when compared with the traditional polyvinyl chloride medical grade tubing material. The results from this study demonstrate NO-releasing albumin plastic's potential as a material for biomedical device applications. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 1535-1542, 2018.
Subject(s)
Albumins/chemistry , Bacterial Adhesion/drug effects , Bacterial Infections/prevention & control , Biocompatible Materials/chemistry , Nitric Oxide Donors/administration & dosage , Plastics/chemistry , S-Nitroso-N-Acetylpenicillamine/administration & dosage , Bacterial Infections/etiology , Equipment and Supplies/adverse effects , Equipment and Supplies/microbiology , Humans , Nitric Oxide Donors/pharmacology , Pseudomonas aeruginosa/drug effects , S-Nitroso-N-Acetylpenicillamine/pharmacology , Staphylococcus aureus/drug effectsABSTRACT
Polyurethanes are widely used in the manufacturing of biomedical catheters and other blood-contacting devices; however, thrombus formation still occurs, which renders these catheters ineffective unless systemic anticlotting agents are used. Nitric oxide (NO) is a well-known inhibitor of platelet activity. In the current study, two commercially available medical polyurethanes (Pellethane and Tecophilic) were derivatized to possess NO-generating Cu(II)-cyclen moieties pendant to the polymer backbone. A new three-step synthetic approach is used, that is simpler than a recently reported method to prepare Cu(II)-cyclen-polyurethane materials. Both derivatized polyurethanes were found to produce NO at levels at or above those of endothelial cells. A comparison between the modified commercial polyurethanes (hydrophobic vs. hydrophilic) is presented, including the synthetic scheme, extensive characterization, and coating application. These derivatized polymers may serve as useful coatings to prevent clotting on the surface of catheters and other blood-contacting biomedical devices.
