title: Soft tissue response to the presence of polypropylene-G-poly(ethylene glycol) comb-type graft copolymers containing gold nanoparticles.
abstract: The aim of this study is to evaluate the soft tissue response of the pure and Au-embedded PPg-PEG. PP-g-PEG2000, PP-g-PEG4000, Au-PP-g-PEG2000, and AuPP-g-PEG4000 were obtained via chlorination of polypropylene and polyethylene glycol in the presence of a base with a "grafting onto" technique. Solvent cast films of these four copolymers with PP as a control group were embedded into five different rats. After 30 days of implantation, microscopic evaluation of inflammation and SEM analysis were done. PP had the most intense inflammatory reaction among the other polymers. PP-PEG block copolymers with high molecular weight and gold-nanoparticles-embedded ones revealed mild inflammatory reaction independently. SEM assessment revealed punched hole-like defects on the surface of all polymer samples except for PP. Graft copolymers with PEG, especially Au-attached ones, have favorable soft tissue response, and inflammatory reaction becomes milder as the number of PEG side chains increases.
authors.affiliation: Department of Neurosurgery, Faculty of Medicine, Mugla University, 48000 Muğla, Turkey. bhazer2@yahoo.com
authors.forename: Derya Burcu
authors.initials: DB
authors.lastname: Hazer
authors.forename: Baki
authors.initials: B
authors.lastname: Hazer
authors.forename: Nazmiye
authors.initials: N
authors.lastname: Dinçer
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000009:adverse effects*; D003238:Connective Tissue / Q000187:drug effects* / Q000378:metabolism; D005260:Female; D006046:Gold / Q000009:adverse effects*; D007249:Inflammation / Q000139:chemically induced* / Q000473:pathology; D008422:Materials Testing; D053768:Metal Nanoparticles; D008855:Microscopy, Electron, Scanning; D008970:Molecular Weight; D011092:Polyethylene Glycols / Q000009:adverse effects* / Q000737:chemistry; D011108:Polymers / Q000009:adverse effects / Q000737:chemistry; D011126:Polypropylenes / Q000009:adverse effects* / Q000737:chemistry; D019919:Prosthesis Implantation; D051381:Rats; D017208:Rats, Wistar; D013499:Surface Properties; D013501:Surface-Active Agents / Q000009:adverse effects
chemical_list: D001672:Biocompatible Materials; D011108:Polymers; D011126:Polypropylenes; D013501:Surface-Active Agents; D011092:Polyethylene Glycols; D006046:Gold