Injectable gellan-gum/hydroxyapatite-based bilayered hydrogel composites for osteochondral tissue regeneration
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/56299 |
Resumo: | Multilayer systems capable of simultaneous dual tissue formation are crucial for regeneration of the osteochondral (OC) unit. Despite the tremendous effort in the field there is still no widely accepted system that stands out in terms of superior OC regeneration. Herein, we developed bilayered hydrogel composites (BHC) combining two structurally stratified layers fabricated from naturally derived and synthetic polymers, gellan-gum (GG) and hydroxyapatite (HAp), respectively. Two formulations were made from either low acyl GG (LAGG) alone or in combination with high acyl GG (HAGG) for the cartilage-like layer. Four bone-like layers were made of LAGG incorporating different ratios of hydroxyapatite (HAp). BHC were assembled in one single construct resulting in eight distinct bilayered constructs. Architectural observations by stereomicroscope and micro-CT (μ-CT) demonstrated a connected stratified structure with good ceramic dispersion within the bone-like layer. Swelling and degradation tests as well mechanical analyse showed a stable viscoelastic construct under dynamic forces. In-vitro studies by encapsulating rabbit's chondrocytes and osteoblasts in the respective layers showed the cytocompatibility of the BHC. Further studies comprising subcutaneous implantation in mice displayed a weak immune response after four weeks. OC orthotopic defects in the rabbit's knee were created and injected with the acellular BHC. OC tissue was regenerated four weeks after implantation as confirmed by cartilaginous and bony tissue formation assessed by histologic staining and μ-CT analysis. The successful fabrication of injectable BHC and their in-vitro and in-vivo performance may be seen as advanced engineered platforms to treat the challenging OC defects. |
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Injectable gellan-gum/hydroxyapatite-based bilayered hydrogel composites for osteochondral tissue regenerationbilayered hydrogel compositesGellan-gumhydroxyapatiteInjectable biomaterialsorthotopic knee modelOsteochondral regenerationScience & TechnologyMultilayer systems capable of simultaneous dual tissue formation are crucial for regeneration of the osteochondral (OC) unit. Despite the tremendous effort in the field there is still no widely accepted system that stands out in terms of superior OC regeneration. Herein, we developed bilayered hydrogel composites (BHC) combining two structurally stratified layers fabricated from naturally derived and synthetic polymers, gellan-gum (GG) and hydroxyapatite (HAp), respectively. Two formulations were made from either low acyl GG (LAGG) alone or in combination with high acyl GG (HAGG) for the cartilage-like layer. Four bone-like layers were made of LAGG incorporating different ratios of hydroxyapatite (HAp). BHC were assembled in one single construct resulting in eight distinct bilayered constructs. Architectural observations by stereomicroscope and micro-CT (μ-CT) demonstrated a connected stratified structure with good ceramic dispersion within the bone-like layer. Swelling and degradation tests as well mechanical analyse showed a stable viscoelastic construct under dynamic forces. In-vitro studies by encapsulating rabbit's chondrocytes and osteoblasts in the respective layers showed the cytocompatibility of the BHC. Further studies comprising subcutaneous implantation in mice displayed a weak immune response after four weeks. OC orthotopic defects in the rabbit's knee were created and injected with the acellular BHC. OC tissue was regenerated four weeks after implantation as confirmed by cartilaginous and bony tissue formation assessed by histologic staining and μ-CT analysis. The successful fabrication of injectable BHC and their in-vitro and in-vivo performance may be seen as advanced engineered platforms to treat the challenging OC defects.This material is based on works supported by the Portuguese Foundation for Science and Technology (FCT) under the OsteoCart project (PTDC/CTM-BPC/115977/2009) and for the M-ERA-NET/0001/2014 project. The authors are grateful to Teresa Oliveira for the assistance with histological studies. DR Pereira acknowledges the FCT for the individual grant (SFRH/BD/81356/2011) and JM Oliveira also thanks the FCT for the funds provided under the program Investigator FTC 2012 and 2015 (IF/00423/2012 and IF/01285/2015).info:eu-repo/semantics/publishedVersionElsevierUniversidade do MinhoPereira, D. R.Canadas, R. F.Silva-Correia, J.da Silva Morais, A.Oliveira, M. B.Dias, I. R.Mano, J. F.Marques, A. P.Reis, R. L.Oliveira, J. M.2018-072018-07-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/56299engPereira D. R., Canadas R. F., Silva-Correia J., da Silva Morais A., Oliveira M. B., Dias I. R., Mano J. F., Marques A. P., Reis R. L., Oliveira J. M. Injectable gellan-gum/hydroxyapatite-based bilayered hydrogel composites for osteochondral tissue regeneration, Applied Materials Today, Vol. 12, pp. 309-321, doi:10.1016/j.apmt.2018.06.005, 20182352-940710.1016/j.apmt.2018.06.005https://www.sciencedirect.com/science/article/pii/S2352940718301616info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-05-11T07:13:04Zoai:repositorium.sdum.uminho.pt:1822/56299Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-11T07:13:04Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Injectable gellan-gum/hydroxyapatite-based bilayered hydrogel composites for osteochondral tissue regeneration |
title |
Injectable gellan-gum/hydroxyapatite-based bilayered hydrogel composites for osteochondral tissue regeneration |
spellingShingle |
Injectable gellan-gum/hydroxyapatite-based bilayered hydrogel composites for osteochondral tissue regeneration Pereira, D. R. bilayered hydrogel composites Gellan-gum hydroxyapatite Injectable biomaterials orthotopic knee model Osteochondral regeneration Science & Technology |
title_short |
Injectable gellan-gum/hydroxyapatite-based bilayered hydrogel composites for osteochondral tissue regeneration |
title_full |
Injectable gellan-gum/hydroxyapatite-based bilayered hydrogel composites for osteochondral tissue regeneration |
title_fullStr |
Injectable gellan-gum/hydroxyapatite-based bilayered hydrogel composites for osteochondral tissue regeneration |
title_full_unstemmed |
Injectable gellan-gum/hydroxyapatite-based bilayered hydrogel composites for osteochondral tissue regeneration |
title_sort |
Injectable gellan-gum/hydroxyapatite-based bilayered hydrogel composites for osteochondral tissue regeneration |
author |
Pereira, D. R. |
author_facet |
Pereira, D. R. Canadas, R. F. Silva-Correia, J. da Silva Morais, A. Oliveira, M. B. Dias, I. R. Mano, J. F. Marques, A. P. Reis, R. L. Oliveira, J. M. |
author_role |
author |
author2 |
Canadas, R. F. Silva-Correia, J. da Silva Morais, A. Oliveira, M. B. Dias, I. R. Mano, J. F. Marques, A. P. Reis, R. L. Oliveira, J. M. |
author2_role |
author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Pereira, D. R. Canadas, R. F. Silva-Correia, J. da Silva Morais, A. Oliveira, M. B. Dias, I. R. Mano, J. F. Marques, A. P. Reis, R. L. Oliveira, J. M. |
dc.subject.por.fl_str_mv |
bilayered hydrogel composites Gellan-gum hydroxyapatite Injectable biomaterials orthotopic knee model Osteochondral regeneration Science & Technology |
topic |
bilayered hydrogel composites Gellan-gum hydroxyapatite Injectable biomaterials orthotopic knee model Osteochondral regeneration Science & Technology |
description |
Multilayer systems capable of simultaneous dual tissue formation are crucial for regeneration of the osteochondral (OC) unit. Despite the tremendous effort in the field there is still no widely accepted system that stands out in terms of superior OC regeneration. Herein, we developed bilayered hydrogel composites (BHC) combining two structurally stratified layers fabricated from naturally derived and synthetic polymers, gellan-gum (GG) and hydroxyapatite (HAp), respectively. Two formulations were made from either low acyl GG (LAGG) alone or in combination with high acyl GG (HAGG) for the cartilage-like layer. Four bone-like layers were made of LAGG incorporating different ratios of hydroxyapatite (HAp). BHC were assembled in one single construct resulting in eight distinct bilayered constructs. Architectural observations by stereomicroscope and micro-CT (μ-CT) demonstrated a connected stratified structure with good ceramic dispersion within the bone-like layer. Swelling and degradation tests as well mechanical analyse showed a stable viscoelastic construct under dynamic forces. In-vitro studies by encapsulating rabbit's chondrocytes and osteoblasts in the respective layers showed the cytocompatibility of the BHC. Further studies comprising subcutaneous implantation in mice displayed a weak immune response after four weeks. OC orthotopic defects in the rabbit's knee were created and injected with the acellular BHC. OC tissue was regenerated four weeks after implantation as confirmed by cartilaginous and bony tissue formation assessed by histologic staining and μ-CT analysis. The successful fabrication of injectable BHC and their in-vitro and in-vivo performance may be seen as advanced engineered platforms to treat the challenging OC defects. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-07 2018-07-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/56299 |
url |
http://hdl.handle.net/1822/56299 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Pereira D. R., Canadas R. F., Silva-Correia J., da Silva Morais A., Oliveira M. B., Dias I. R., Mano J. F., Marques A. P., Reis R. L., Oliveira J. M. Injectable gellan-gum/hydroxyapatite-based bilayered hydrogel composites for osteochondral tissue regeneration, Applied Materials Today, Vol. 12, pp. 309-321, doi:10.1016/j.apmt.2018.06.005, 2018 2352-9407 10.1016/j.apmt.2018.06.005 https://www.sciencedirect.com/science/article/pii/S2352940718301616 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
mluisa.alvim@gmail.com |
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