title: Pulsed laser deposition of antimicrobial silver coating on Ormocer microneedles.
abstract: One promising option for transdermal delivery of protein- and nucleic acid-based pharmacologic agents involves the use of microneedles. However, microneedle-generated pores may allow microorganisms to penetrate the stratum corneum layer of the epidermis and cause local or systemic infection. In this study, microneedles with antimicrobial functionality were fabricated using two-photon polymerization-micromolding and pulsed laser deposition.The antibacterial activity of the silver-coated organically modified ceramic (Ormocer)microneedles was demonstrated using an agar diffusion assay. Human epidermal keratinocyte viability on the Ormocer surfaces coated with silver was similar to that on uncoated Ormocer surfaces. This study indicates that coating microneedles with silver thin films using pulsed laser deposition is a useful and novel approach for creating microneedles with antimicrobial functionality.
authors.affiliation: Joint Department of Biomedical Engineering, North Carolina State University, Raleigh, NC 27695,USA.
authors.forename: S D
authors.initials: SD
authors.lastname: Gittard
authors.forename: R J
authors.initials: RJ
authors.lastname: Narayan
authors.forename: C
authors.initials: C
authors.lastname: Jin
authors.forename: A
authors.initials: A
authors.lastname: Ovsianikov
authors.forename: B N
authors.initials: BN
authors.lastname: Chichkov
authors.forename: N A
authors.initials: NA
authors.lastname: Monteiro-Riviere
authors.forename: S
authors.initials: S
authors.lastname: Stafslien
authors.forename: B
authors.initials: B
authors.lastname: Chisholm
mesh_terms: D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000737:chemistry; D001709:Biotechnology; D002470:Cell Survival / Q000187:drug effects; D002516:Ceramics / Q000737:chemistry*; D004058:Diffusion; D016503:Drug Delivery Systems / Q000295:instrumentation*; D006801:Humans; D015603:Keratinocytes; D008826:Microbial Sensitivity Tests; D008855:Microscopy, Electron, Scanning; D055616:Microtechnology / Q000379:methods*; D009339:Needles; D063225:Organically Modified Ceramics; D012821:Silanes / Q000008:administration & dosage / Q000737:chemistry*; D012834:Silver / Q000008:administration & dosage / Q000737:chemistry*; D013211:Staphylococcus aureus / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D063225:Organically Modified Ceramics; D012821:Silanes; D012834:Silver