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Enhancement of Biomimetic Enzymatic Mineralization of Gellan Gum Polysaccharide Hydrogels by Plant-Derived Gallotannins

TEL. Douglas, JK. Keppler, M. Vandrovcová, M. Plencner, J. Beranová, M. Feuereisen, BV. Parakhonskiy, Y. Svenskaya, V. Atkin, A. Ivanova, P. Ricquier, L. Balcaen, F. Vanhaecke, A. Schieber, L. Bačáková, AG. Skirtach

. 2020 ; 21 (7) : . [pub] 20200327

Language English Country Switzerland

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc21012776

Grant support
Postdoctoral Fellowships, travel grant Fonds Wetenschappelijk Onderzoek
17-00885S Czech science foundation
J.K.K. Deutsche Forschungsgemeinschaft
A.G.S. BOF (Bijzonder Onzderzoeksfonds) of Ghent University, Belgium

Mineralization of hydrogel biomaterials with calcium phosphate (CaP) is considered advantageous for bone regeneration. Mineralization can be both induced by the enzyme alkaline phosphatase (ALP) and promoted by calcium-binding biomolecules, such as plant-derived polyphenols. In this study, ALP-loaded gellan gum (GG) hydrogels were enriched with gallotannins, a subclass of polyphenols. Five preparations were compared, namely three tannic acids of differing molecular weight (MW), pentagalloyl glucose (PGG), and a gallotannin-rich extract from mango kernel (Mangifera indica L.). Certain gallotannin preparations promoted mineralization to a greater degree than others. The various gallotannin preparations bound differently to ALP and influenced the size of aggregates of ALP, which may be related to ability to promote mineralization. Human osteoblast-like Saos-2 cells grew in eluate from mineralized hydrogels. Gallotannin incorporation impeded cell growth on hydrogels and did not impart antibacterial activity. In conclusion, gallotannin incorporation aided mineralization but reduced cytocompatibility.

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$a Enhancement of Biomimetic Enzymatic Mineralization of Gellan Gum Polysaccharide Hydrogels by Plant-Derived Gallotannins / $c TEL. Douglas, JK. Keppler, M. Vandrovcová, M. Plencner, J. Beranová, M. Feuereisen, BV. Parakhonskiy, Y. Svenskaya, V. Atkin, A. Ivanova, P. Ricquier, L. Balcaen, F. Vanhaecke, A. Schieber, L. Bačáková, AG. Skirtach
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$a Mineralization of hydrogel biomaterials with calcium phosphate (CaP) is considered advantageous for bone regeneration. Mineralization can be both induced by the enzyme alkaline phosphatase (ALP) and promoted by calcium-binding biomolecules, such as plant-derived polyphenols. In this study, ALP-loaded gellan gum (GG) hydrogels were enriched with gallotannins, a subclass of polyphenols. Five preparations were compared, namely three tannic acids of differing molecular weight (MW), pentagalloyl glucose (PGG), and a gallotannin-rich extract from mango kernel (Mangifera indica L.). Certain gallotannin preparations promoted mineralization to a greater degree than others. The various gallotannin preparations bound differently to ALP and influenced the size of aggregates of ALP, which may be related to ability to promote mineralization. Human osteoblast-like Saos-2 cells grew in eluate from mineralized hydrogels. Gallotannin incorporation impeded cell growth on hydrogels and did not impart antibacterial activity. In conclusion, gallotannin incorporation aided mineralization but reduced cytocompatibility.
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$a Vandrovcová, Marta $u Department of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, 142 00 Prague, Czech Republic
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