title: Synthesis and characterization of glycolide, L-lactide, and PDMS-based terpolymers as a support for cell cultures.
abstract: Poly(lactic acid)/poly(glycolic acid)/poly(dimethylsiloxane) (PLGA/TEGOMER) terpolymers have been synthesized by the ring-opening polymerization of L-lactide and glycolide with alpha,omega-amine-terminated poly(dimethylsiloxane) prepolymer, using stannous octoate as a catalyst. The resulting terpolymers were characterized by various analytical techniques including size exclusion chromatography, 1H-nuclear magnetic resonance (1H-NMR), Fourier transform infrared spectroscopy, and differential scanning calorimetry. The data showed that the terpolymers presented an amorphous structure. The glass transition temperature decreased with increasing TEGOMER unit content. For in vitro degradation studies, porous films were fabricated using a solvent-casting, particulate leaching technique. Degradation of the PLGA/TEGOMER terpolymer was studied in phosphate-buffered saline at pH 7.4 and 37 degrees C. The degradation was followed by intrinsic viscosity, mass loss, and molecular weight measurements, and 1H-NMR spectroscopy. The mass loss after 55 days was 76% for the PLGA/TEGOMER (71/24/5) sample. Cell growth experiments using Swiss 3T3 fibroblasts demonstrated that PLGA/TEGOMER terpolymer matrices allow the attachment and growth of cells.
authors.affiliation: TUBITAK-Marmara Research Center, Research Institute of Materials and Chemical Technologies, 41470 Gebze-Kocaeli, Turkey.
authors.forename: Alexandra
authors.initials: A
authors.lastname: Porjazoska
authors.forename: Nilhan
authors.initials: N
authors.lastname: Kayaman-Apohan
authors.forename: Okşan
authors.initials: O
authors.lastname: Karal-Yilmaz
authors.forename: Maja
authors.initials: M
authors.lastname: Cvetkovska
authors.forename: Kemal
authors.initials: K
authors.lastname: Baysal
authors.forename: Bahattin M
authors.initials: BM
authors.lastname: Baysal
mesh_terms: D016475:3T3 Cells; D000818:Animals; D001672:Biocompatible Materials / Q000138:chemical synthesis*; D001673:Biodegradation, Environmental; D002448:Cell Adhesion; D018929:Cell Culture Techniques / Q000379:methods; D002455:Cell Division; D004129:Dimethylpolysiloxanes; D019344:Lactic Acid; D051379:Mice; D011091:Polyesters; D011100:Polyglycolic Acid; D011108:Polymers / Q000138:chemical synthesis*; D012828:Silicones; D013696:Temperature; D023822:Tissue Engineering / Q000379:methods*
chemical_list: D001672:Biocompatible Materials; D004129:Dimethylpolysiloxanes; D011091:Polyesters; D011108:Polymers; D012828:Silicones; D011100:Polyglycolic Acid; D019344:Lactic Acid; C033616:poly(lactide); C013830:baysilon