title: Tuning model drug release and soft-tissue bioadhesion of polyester films by plasma post-treatment.
abstract: Plasma treatments are investigated as a post-production method of tuning drug release and bioadhesion of poly(lactic-co-glycolic acid) (PLGA) thin films. PLGA films were treated under varying conditions by controlling gas flow rate, composition, treatment time, and radio frequency (RF) power. In vitro release of the drug-like molecule fluorescein diacetate (FDAc) from plasma-treated PLGA was tunable by controlling RF power; an increase of 65% cumulative release is reported compared to controls. Bioadhesion was sensitive to RF power and treatment time, assessed using ex vivo shear-stress tests with wetted swine aorta. We report a maximum bioadhesion ∼6-fold that of controls and 5-fold that of DOPA-based mussel adhesives tested to swine skin.1 The novelty of this post-treatment is the activation of a hydrophobic polyester film for bioadhesion, which can be quenched, while simultaneously tuning drug-release kinetics. This exemplifies the promise of plasma post-treatment for in-clinic bioadhesive activation, along with technological advancements, i.e., atmospheric plasma and hand-held "plasma pencils".
authors.affiliation: Materials and Science Engineering, Division of Materials Technology, Nanyang Technological University , Singapore 639798, Republic of Singapore.
authors.forename: Vishal T
authors.initials: VT
authors.lastname: Mogal
authors.forename: Chaw Su
authors.initials: CS
authors.lastname: Yin
authors.forename: Richard
authors.initials: R
authors.lastname: O'Rorke
authors.forename: Souhir
authors.initials: S
authors.lastname: Boujday
authors.forename: Christophe
authors.initials: C
authors.lastname: Méthivier
authors.forename: Subbu S
authors.initials: SS
authors.lastname: Venkatraman
authors.forename: Terry W J
authors.initials: TW
authors.lastname: Steele
mesh_terms: D000818:Animals; D001011:Aorta / Q000737:chemistry; D004337:Drug Carriers / Q000737:chemistry*; D016503:Drug Delivery Systems / Q000295:instrumentation; D065546:Drug Liberation; D055664:Electrochemical Techniques; D066298:In Vitro Techniques; D007700:Kinetics; D019344:Lactic Acid / Q000737:chemistry; D011091:Polyesters / Q000737:chemistry*; D011100:Polyglycolic Acid / Q000737:chemistry; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D013552:Swine
chemical_list: D004337:Drug Carriers; D011091:Polyesters; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid