Abstract:
:Stereolithography-assisted fabrication of hydrogels of carboxybetaine methacrylamide (CBMAA) and a α,ω-methacrylate poly(d,l-lactide-block-ethylene glycol-block- d,l-lactide) (MA-PDLLA-PEG-PDLLA-MA) telechelic triblock macromer is presented. This technique allows printing complex structures with gyroid interconnected porosity possessing extremely high specific area. Hydrogels are characterized by infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and laser scanning confocal microscopy (LSCM). The copolymerization with zwitterionic comonomer leads hydrogels with high equilibrium water content (EWC), up to 700% while maintaining mechanical robustness. The introduction of carboxybetaine yields excellent resistance to nonspecific protein adsorption while providing a facile way for specific biofunctionalization with a model protein, fluorescein isothiocyanate labeled bovine serum albumin (BSA). The homogeneous protein immobilization across the hydrogel pores prove the accessibility to the innermost pore volumes. The remarkably low protein adsorption combined with the interconnected nature of the porosity allowing fast diffusion of nutrient and waste product and the mimicry of bone trabecular, makes the hydrogels presented here highly attractive for tissue engineering.
journal_name
Macromol Bioscijournal_title
Macromolecular bioscienceauthors
Kostina NY,Blanquer S,Pop-Georgievski O,Rahimi K,Dittrich B,Höcherl A,Michálek J,Grijpma DW,Rodriguez-Emmenegger Cdoi
10.1002/mabi.201800403subject
Has Abstractpub_date
2019-04-01 00:00:00pages
e1800403issue
4eissn
1616-5187issn
1616-5195journal_volume
19pub_type
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