title: Post-culture treatment protocols for PLGA membrane scaffolds.
abstract: The interactions of post-culture treatments reagents used for fixing, lysing and cell quantification on poly(lactide-co-glycolide) (PLGA) flat sheet membrane scaffolds are presented. Lysing with Alkaline buffer solution/Triton X-100/MilliQ water (ATM) and fixing with 10% Neutral Buffered Formalin (10% NBF) had no affect on membrane structure while fixing with 95% ethanol caused smoothing of the surface, shrinkage and a reduction in surface area of 55, 48 and 33, for 100:0, 75:25 and 50:50 (PLA:PGA), respectively. PicoGreen assay was selected for cell (560pZIPv.neo) quantification since the background noise would not affect readings for cell numbers over 3,000 cells/cm(2), while the background reading was too high for MTT and Methylene Blue (MB). MB at 0.5% (w/v) was, however, deemed suitable for visualising cell morphology on the membranes. Furthermore ATM buffer was suitable for the PicoGreen assay, which allows the same samples to be used for quantification of alkaline phosphatase activity.
authors.affiliation: Department of Chemical Engineering, Centre for Regenerative Medicine, University of Bath, Claverton Down, Bath BA2 7AY, UK. M.J.Ellis@bath.ac.uk
authors.forename: Marianne J
authors.initials: MJ
authors.lastname: Ellis
authors.forename: Richard
authors.initials: R
authors.lastname: Forsey
authors.forename: Julian B
authors.initials: JB
authors.lastname: Chaudhuri
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D018929:Cell Culture Techniques / Q000379:methods*; D002460:Cell Line; D049109:Cell Proliferation; D019344:Lactic Acid / Q000737:chemistry*; D008422:Materials Testing; D008567:Membranes, Artificial; D010006:Osteoblasts / Q000166:cytology* / Q000502:physiology*; D011100:Polyglycolic Acid / Q000737:chemistry*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D023822:Tissue Engineering / Q000379:methods*
chemical_list: D001672:Biocompatible Materials; D008567:Membranes, Artificial; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid