title: In vitro cytocompatibility evaluation of a thermoresponsive NIPAAm-MMA copolymeric surface using L929 cells.
abstract: Scaffold free tissue constructs are preferred in tissue engineering as they overcome all the problems associated with scaffolds. Stimuli responsive polymers enable generation of scaffold free multilayered tissue constructs which would in turn reduce the use of biomaterials in vivo. In this study, we investigated cytocompatibility and thermoresponsiveness of a copolymer of N-Isopropylacrylamide and Methyl Methacrylate. Thermoresponsive surfaces were prepared by coating tissue culture polystyrene with the copolymer solution in isopropanol. Mammalian fibroblast cells (L929 cells) readily adhered on the copolymer. The viability and cellular activity was ensured through Neutral red staining, MTT assay, Tritiated thymidine uptake assay and Immunofluorescent staining for cytoskeletal organisation. Incubation under lower critical solution temperature of copolymer resulted in intact detachment of cells. To conclude, in-house synthesized cytocompatible smart culture substrate intended for tissue engineering was developed using a cost effective and simple technique. Moreover, presence of methyl methacrylate in the copolymer reduced the lower critical solution temperature facilitating extended in vitro manipulation time. As the copolymer is insoluble in water, the copolymer could be polymerised without additional crosslinkers.
authors.affiliation: Tissue Culture Laboratory, Division of Implant Biology, Biomedical Technology Wing, Sree Chithra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India.
authors.forename: Viji Mary
authors.initials: VM
authors.lastname: Varghese
authors.forename: Vidya
authors.initials: V
authors.lastname: Raj
authors.forename: K
authors.initials: K
authors.lastname: Sreenivasan
authors.forename: T V
authors.initials: TV
authors.lastname: Kumary
mesh_terms: D000178:Acrylamides; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry*; D002477:Cells; D005347:Fibroblasts / Q000378:metabolism; D007739:L Cells; D020366:Methylmethacrylate; D051379:Mice; D011108:Polymers / Q000737:chemistry*; D013696:Temperature; D023822:Tissue Engineering; D014867:Water / Q000737:chemistry
chemical_list: D000178:Acrylamides; D001672:Biocompatible Materials; D011108:Polymers; D014867:Water; D020366:Methylmethacrylate; C067295:N-isopropylacrylamide