title: Biomimetic macroporous hydrogel scaffolds in a high-throughput screening format for cell-based assays.
abstract: Macroporous hydrogels (MHs) hold great promise as scaffolds in tissue engineering and cell-based assays. In this study, the possibility of combination of three-dimensional (3D) cell culture with a miniaturized screening format was demonstrated on human colon cancer HCT116, human acute myeloid leukemia KG-1 cells, and embryonic fibroblasts cultured on MHs (12.5 mm x 7.1 mm I.D.) in a 96-minicolumn plate format. MHs were prepared by cryogelation technique and functionalized by coating with type I collagen and by copolymerization with agmatine-based mimetic of cell adhesive peptide RGD (abRGDm). Cancer cells formed multicellular aggregates while fibroblasts formed adhesions on abRGDm-containing and collagen-MHs but not on plain MHs, as was demonstrated by scanning electron microscopy. HCT116 and KG-1 cells grown as aggregates were more resistant to the treatment with cis-diaminedichloroplatinum (II) (cisplatin) and cytosine 1-beta-D-arabinofuranoside (Ara-C), respectively, during the first 18-24 h of incubation, than single cells grown on unmodified MH. HCT116 cells grown as 2D cultures in conventional 96-well tissue culture plates were 1.5- to 3.5-fold more sensitive to the treatment with 70 microM cisplatin than cells in 3D cultures in functionalized MHs. Further development of the described experimental system including matching of a specific cell type with appropriate extracellular matrix (ECM) components and 3D cocultures on ECM-modified MHs may provide a realistic in vitro experimental model for high-throughput toxicity tests.
authors.affiliation: Protista Biotechnology AB, IDEON, Lund, Sweden.
authors.forename: Maria B
authors.initials: MB
authors.lastname: Dainiak
authors.forename: Irina N
authors.initials: IN
authors.lastname: Savina
authors.forename: Isabella
authors.initials: I
authors.lastname: Musolino
authors.forename: Ashok
authors.initials: A
authors.lastname: Kumar
authors.forename: Bo
authors.initials: B
authors.lastname: Mattiasson
authors.forename: Igor Yu
authors.initials: IY
authors.lastname: Galaev
mesh_terms: D017209:Apoptosis / Q000187:drug effects; D001672:Biocompatible Materials / Q000737:chemistry*; D002448:Cell Adhesion; D018929:Cell Culture Techniques / Q000379:methods; D049109:Cell Proliferation; D002478:Cells, Cultured; D002945:Cisplatin / Q000494:pharmacology; D005347:Fibroblasts / Q000166:cytology / Q000187:drug effects; D006801:Humans; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000138:chemical synthesis / Q000737:chemistry*; D016062:Porosity; D013499:Surface Properties
chemical_list: D001672:Biocompatible Materials; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D002945:Cisplatin