Advanced Drug-Eluting Poly (Vinyl Chloride) Surfaces Deposited by Spin Coating

Medicina

Lia-Mara Ditu¹  Cornelia-Ioana Ilie²  Ecaterina Andronescu²  Anton Ficai²  Denisa Ficai²  Roxana Trusca²  OanaCristina Duta²  Maxim Maximov³ 

[1] Department of Microbiology and Immunology, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania;Department of Science and Engineering of Oxide Materials and Nanomaterials, Politehnica University of Bucharest, 011061 Bucharest, Romania;SC Microsin SRL, 032364 Bucharest, Romania;

关键词: polyvinyl chloride;    catheters;    spin coating;    surface modification;    dicoumarol;   

DOI  :  10.3390/medicina55080421

来源: DOAJ

【 摘 要 】

Background and objectives: Medical devices such as catheters are used on a large scale to treat heart and cardiovascular diseases. Unfortunately, they present some important drawbacks (structure failure, calcifications, infections, thrombosis, etc.), with the main side effects occurring due to adhesion and proliferation of bacteria and living cells on the surface of the implanted devices. The aim of this work is to modify the surface of polyvinyl chloride (PVC), an affordable biocompatible material, in order to reduce these aforementioned side effects. Materials and Methods: The surface of PVC was modified by depositing a thin layer also of PVC that incorporates an active substance, dicoumarol (a well-known anticoagulant), by spin coating process. The modified surfaces were analyzed by Fourier-transform infrared (FT-IR) microscopy, Fourier-transform infrared (FT-IR) spectroscopy, Ultraviolet-visible spectroscopy (UV-VIS), and Scanning electron microscopy (SEM) in order to determine the surface morphology and behavior. The samples were tested for Gram-positive (S. aureus ATCC 25923) and Gram-negative (P. aeruginosa ATCC 27853) standard strains from American Type Culture Collection (ATCC). Results: The material obtained had a smooth surface with a uniform distribution of dicoumarol, which is released depending on the deposition parameters. The concentration of dicoumarol at the surface of the material and also the release rate is important for the applications for which the surface modification was designed. PVC modified using the proposed method showed a good ability to prevent salt deposition and decreased the protein adhesion, and the resistance to bacterial adherence was improved compared with standard PVC.

【 授权许可】

Unknown