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- W3027884998 abstract "Tissue regeneration often requires the use of biocompatible resorbable scaffolds to support the ingrowth of cells from neighboring tissues into a localized tissue defect. Such scaffolds must possess surface molecular cues that stimulate cells to populate the device, the first necessary condition for the formation of a healthy tissue. Chitosan is a natural polymer that has long been tested in biomedical applications because of its high biocompatibility, which can be further increased by modifying its formulation, e.g. adding D-(+) raffinose. We used this formulation in an ad hoc designed 3D printer to create regularly ordered scaffolds, which we then enriched with type IV collagen, an isoform of collagen that is exclusively found in basement membranes. Human epithelial A549 cells were then seeded on control scaffolds or on scaffolds coated with collagen, which was precipitated, or on scaffolds first collagenized and then exposed to either UVB or UVC radiation. Observations by the transmission light microscope, confocal microscope after staining with calcein-AM/propidium iodide, and by environmental scanning electron microscope revealed that collagen-enriched UV-treated scaffolds promoted the attachment of a higher number of cells, which covered a more extensive area of the scaffold, as also confirmed by alamar blue viability assay. Together these data confirm that coating 3D-printed scaffolds made of D-(+) raffinose-modified chitosan with type IV collagen and exposing them to UV light sensibly increases the cell compatibility of scaffolds, making them a better candidate to serve as a tool for the regeneration of epithelia." @default.
- W3027884998 created "2020-05-29" @default.
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- W3027884998 date "2020-08-28" @default.
- W3027884998 modified "2023-09-25" @default.
- W3027884998 title "3D-printed chitosan scaffolds modified with D-(+) raffinose and enriched with type IV collagen to improve epithelial cell colonization" @default.
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- W3027884998 doi "https://doi.org/10.1088/1748-605x/ab9552" @default.
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