Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/23665

TitleBiocompatibility evaluation of ionic- and photo-crosslinked methacrylated gellan gum hydrogels: in vitro and In vivo study
Author(s)Silva-Correia, Joana
Zavan, B.
Vindigni, V.
Silva, Tiago H.
Oliveira, Joaquim M.
Abatangelo, G.
Reis, R. L.
KeywordsBiocompatibility
Hydrogels
In vitro
In vivo
Methacrylated gellan gum
Issue date2013
PublisherWiley
JournalAdvanced Healthcare Materials
Abstract(s)In this study, the stability and biocompatibility of methacrylated gellan gum hydrogels, obtained either by ionic- (iGG-MA) or photo-crosslinking (phGGMA), were evaluated in vitro and in vivo. Size exclusion chromatography analysis of the methacrylated gellan gum (GG-MA) powder revealed that molecular weight is lower as compared to the non-modifi ed material, i.e., low acyl gellan gum. The water uptake and swelling of iGG-MA and phGGMA hydrogels were investigated in phosphate-buffered saline solution (pH 7.4). The biocompatibility of the hydrogels was fi rstly evaluated by producing cell-laden hydrogels. The in vitro cells encapsulation study showed that lung fi broblast cells (L929 cells) and human intervertebral disc (hIVD) cells are viable when cultured within both hydrogels, up to 21 days of culturing. The iGG-MA and phGG-MA hydrogels were also subcutaneously implanted in Lewis rats for 10 and 18 days. Tissue response to the hydrogels implantation was determined by histological analysis (haematoxylin-eosin staining). A thin fi brous capsule was observed around the implanted hydrogels. No necrosis, calcifi cation, and acute infl ammatory reaction were observed. The results presented in this study demonstrate that iGG-MA and phGG-MA hydrogels are stable in vitro and in vivo, support L929 and hIVD cells’ encapsulation and viability, and were found to be well-tolerated and non-toxic in vivo.
TypeArticle
URIhttp://hdl.handle.net/1822/23665
DOI10.1002/adhm.201200256
ISSN2192-2659
Publisher versionhttp://onlinelibrary.wiley.com/doi/10.1002/adhm.201200256/abstract
Peer-Reviewedyes
AccessOpen access
Appears in Collections:3B’s - Artigos em revistas/Papers in scientific journals

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