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Blood-vessel mimicking structures by stereolithographic fabrication of small porous tubes using cytocompatible polyacrylate elastomers, biofunctionalization and endothelialization

  • Blood vessel reconstruction is still an elusive goal for the development of in vitro models as well as artificial vascular grafts. In this study, we used a novel photo curable cytocompatible polyacrylate material (PA) for freeform generation of synthetic vessels. We applied stereolithography for the fabrication of arbitrary 3D tubular structures with total dimensions in the centimeter range, 300 µm wall thickness, inner diameters of 1 to 2 mm and defined pores with a constant diameter of approximately 100 µm or 200 µm. We established a rinsing protocol to remove remaining cytotoxic substances from the photo-cured PA and applied thio-modified heparin and RGDC-peptides to functionalize the PA surface for enhanced endothelial cell adhesion. A rotating seeding procedure was introduced to ensure homogenous endothelial monolayer formation at the inner luminal tube wall. We showed that endothelial cells stayed viable and adherent and aligned along the medium flow under fluid-flow conditions comparable to native capillaries. The combined technology approach comprising of freeform additive manufacturing (AM), biomimetic design, cytocompatible materials which are applicable to AM, and biofunctionalization of AM constructs has been introduced as BioRap® technology by the authors.

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Metadaten
Name:Kluger, Petra
URN:urn:nbn:de:bsz:rt2-opus4-13369
DOI:https://doi.org/10.3390/jfb7020011
ISSN:2079-4983
eISSN:2079-4983
Erschienen in:Journal of functional biomaterials
Publisher:MDPI
Place of publication:Basel
Document Type:Article
Language:English
Year of Publication:2016
Tag:artificial blood vessel; biofunctionalization; endothelialization; small branched and porous tubes; stereolithography; thio-modified heparin
Volume:7
Issue:2
Pagenumber:18
First Page:1
Last Page:18
Dewey Decimal Classification:570 Biowissenschaften, Biologie
Open Access:Ja
Licence (German):License Logo  Creative Commons - Namensnennung