title: Inhibition of bacterial adhesion and biofilm formation on zwitterionic surfaces.
abstract: In this work, we report a study of long-chain zwitterionic poly(sulfobetaine methacrylate) (pSBMA) surfaces grafted via atom transfer radical polymerization (ATRP) for their resistance to bacterial adhesion and biofilm formation. Previously, we demonstrated that p(SBMA) is highly resistant to nonspecific protein adsorption. Poly(oligo(ethylene glycol) methyl ether methacrylate) (pOEGMA) grafted surfaces were also studied for comparison. Furthermore, we quantify how surface grafting methods will affect the long-term biological performance of the surface coatings. Thus, self-assembled monolayers (SAMs) of alkanethiols with shorter-chain oligo(ethylene glycol) (OEG) and mixed SO3-/N+(CH3)3 terminated groups were prepared on gold surfaces. The short-term adhesion (3 h) and the long-term accumulation (24 or 48 h) of two bacterial species (Gram-positive Staphylococcus epidermidis and Gram-negative Pseudomonas aeruginosa) on these surfaces were studied using a laminar flow chamber. Methyl-terminated (CH3) SAM on gold and a bare glass were chosen as references. p(SBMA) reduced short-term adhesion of S. epidermidis and P. aeruginosa relative to glass by 92% and 96%, respectively. For long-term biofilm formation, qualitative images showed that p(SBMA) dramatically reduced biofilm formation of S. epidermidis and P. aeruginosa as compared to glass.
authors.affiliation: Department of Chemical Engineering, University of Washington, Seattle, WA 98195, USA.
authors.forename: Gang
authors.initials: G
authors.lastname: Cheng
authors.forename: Zheng
authors.initials: Z
authors.lastname: Zhang
authors.forename: Shengfu
authors.initials: S
authors.lastname: Chen
authors.forename: James D
authors.initials: JD
authors.lastname: Bryers
authors.forename: Shaoyi
authors.initials: S
authors.lastname: Jiang
mesh_terms: D001422:Bacterial Adhesion / Q000187:drug effects*; D018441:Biofilms / Q000254:growth & development*; D020099:Coated Materials, Biocompatible / Q000737:chemistry / Q000494:pharmacology*; D004203:Disinfection / Q000379:methods*; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry / Q000494:pharmacology*; D011550:Pseudomonas aeruginosa / Q000187:drug effects* / Q000502:physiology; D013212:Staphylococcus epidermidis / Q000187:drug effects* / Q000502:physiology
chemical_list: D020099:Coated Materials, Biocompatible; D008689:Methacrylates; C521589:sulfobetaine methacrylate polymer