Enrichment of chitosan hydrogels with perfluorodecalin promotes gelation and stem cell vitality

Douglas, Timothy E. L. and Pilarek, Maciej and Kalaszczynska, Ilona and Senderek, Ilona and Skwarczynska, Agata and Cuijpers, Vincent M. J. I. and Modrzejewska, Zofia and Lewandowska-Szumiel, Malgorzata and Dubruel, Peter (2014) Enrichment of chitosan hydrogels with perfluorodecalin promotes gelation and stem cell vitality. Materials Letters, 128. pp. 79-84. ISSN 0167-577X

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Abstract

Thermosensitive injectable hydrogels for bone regeneration consisting of chitosan, sodium beta-glycerophosphate (Na-β-GP) and alkaline phosphatase (ALP) were enriched with oxygenated perfluorodecalin (PFD), a liquid hydrophobic perfluorochemical with high oxygen affinity, in order to improve cell growth on the hydrogels. Furthermore, influence of PFD concentration on hydrogel physicochemical properties relevant for bone regeneration, namely gelation speed, radiopacity and homogenicity, was investigated. Addtionally, ALP-mediated and non-ALP-mediated mineralization were evaluated by incubation in 0.1 M calcium glycerophosphate and simulated body fluid. 2% (w/v) chitosan hydrogels containing 2.5 mg/ml ALP were enriched with PFD at five concentrations, namely 0 (control), 0.069, 0.138, 0.207 and 0.276 ml/ml hydrogel, denoted A, B, C, D and E, respectively. Rheometrical investigations revealed that gelation speed increased with increasing PFD concentration. Micro-CT analysis revealed homogenicity of all sample groups except E and that radiopacity increased in the order B>C>A>D>E. ALP-mediated and non-ALP-mediated mineralization were not affected adversely by PFD. Growth of human adipose tissue-derived mesenchymal stem cells (ADSC) encapsulated in hydrogels was markedly higher in sample groups containing PFD, i.e. B–E. Hence, incorporation of oxygenated PFD can improve the suitability of hydrogels as bone regeneration materials.

Item Type:
Journal Article
Journal or Publication Title:
Materials Letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
132329
Deposited By:
Deposited On:
02 Apr 2019 09:10
Refereed?:
Yes
Published?:
Published
Last Modified:
07 Jan 2020 06:46