Fabrication of gelatin methacrylate/nanohydroxyapatite microgel arrays for periodontal tissue regeneration

Xi Chen,1 Shizhu Bai,1 Bei Li,2 Huan Liu,1 Guofeng Wu,1 Sha Liu,3 Yimin Zhao1 1State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, 2State Key Laboratory of Military Stomatology a...

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Autores principales:	Chen X, Bai S, Li B, Liu H, Wu G, Liu S, Zhao Y
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2016
Materias:	periodontal ligament stem cells gelatin methacrylate nano-hydroxyapatite microgel array differentiation periodontal tissue regeneration Medicine (General) R5-920
Acceso en línea:	https://doaj.org/article/8844cebac281431482ac603ab71cabb2
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spelling	oai:doaj.org-article:8844cebac281431482ac603ab71cabb22021-12-02T02:41:36ZFabrication of gelatin methacrylate/nanohydroxyapatite microgel arrays for periodontal tissue regeneration1178-2013https://doaj.org/article/8844cebac281431482ac603ab71cabb22016-09-01T00:00:00Zhttps://www.dovepress.com/fabrication-of-gelatin-methacrylatenanohydroxyapatite-microgel-arrays--peer-reviewed-article-IJNhttps://doaj.org/toc/1178-2013Xi Chen,1 Shizhu Bai,1 Bei Li,2 Huan Liu,1 Guofeng Wu,1 Sha Liu,3 Yimin Zhao1 1State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, 2State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Oral Diseases, Center for Tissue Engineering, School of Stomatology, 3Department of Plastic and Reconstructive Surgery, Xijing Hospital, The Fourth Military Medical University, Shaanxi, People’s Republic of China Introduction: Periodontitis is a chronic infectious disease and is the major cause of tooth loss and other oral health issues around the world. Periodontal tissue regeneration has therefore always been the ultimate goal of dentists and researchers. Existing fabrication methods mainly focused on a top–down tissue engineering strategy in which several drawbacks remain, including low throughput and limited diffusion properties resulting from a large sample size. Gelatin methacrylate (GelMA) is a kind of photocrosslinkable and biocompatible hydrogel, with the capacities of enabling cell encapsulation and regeneration of functional tissues. Here, we developed a novel method to fabricate GelMA/nanohydroxylapatite (nHA) microgel arrays using a photocrosslinkable strategy. The viability, proliferation, and osteogenic differentiation and in vivo osteogenesis of human periodontal ligament stem cells (hPDLSCs) encapsulated in microgels were evaluated. The results suggested that such microgels provide great potential for periodontal tissue repair and regeneration. Methods: Microgel arrays were fabricated by blending different weight ratios of GelMA and nHA. hPDLSCs were encapsulated in GelMA/nHA microgels of various ratios for a systematic evaluation of cell viability, proliferation, and osteogenic differentiation. In vivo osteogenesis in nude mice was also studied. Results: The GelMA/nHA microgels exhibited appropriate microarchitecture, mechanical strength, and surface roughness, thus enabling cell adhesion and proliferation. Additionally, the GelMA/nHA microgels (10%/2% w/v) enhanced the osteogenic differentiation of hPDLSCs by elevating the expression levels of osteogenic biomarker genes, such as ALP, BSP, OCN, and RUNX2. In vivo ectopic transplantation results showed that GelMA/nHA microgels (10%/2% w/v) increased mineralized tissue formation with abundant vascularization, compared with the 1%, 3%, and the pure GelMA group. Conclusion: The GelMA/nHA microgels (10%/2% w/v) facilitated hPDLSCs viability, proliferation, and osteogenic differentiation in vitro and further promoted new bone formation in vivo, suggesting that the GelMA/nHA microgels (10%/2% w/v) provide great potential for periodontal tissue regeneration. Keywords: periodontal ligament stem cells, gelatin methacrylate, nanohydroxyapatite, microgel array, differentiation, periodontal tissue regenerationChen XBai SLi BLiu HWu GLiu SZhao YDove Medical Pressarticleperiodontal ligament stem cellsgelatin methacrylatenano-hydroxyapatitemicrogel arraydifferentiationperiodontal tissue regenerationMedicine (General)R5-920ENInternational Journal of Nanomedicine, Vol Volume 11, Pp 4707-4718 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	periodontal ligament stem cells gelatin methacrylate nano-hydroxyapatite microgel array differentiation periodontal tissue regeneration Medicine (General) R5-920
spellingShingle	periodontal ligament stem cells gelatin methacrylate nano-hydroxyapatite microgel array differentiation periodontal tissue regeneration Medicine (General) R5-920 Chen X Bai S Li B Liu H Wu G Liu S Zhao Y Fabrication of gelatin methacrylate/nanohydroxyapatite microgel arrays for periodontal tissue regeneration
description	Xi Chen,1 Shizhu Bai,1 Bei Li,2 Huan Liu,1 Guofeng Wu,1 Sha Liu,3 Yimin Zhao1 1State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, 2State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Oral Diseases, Center for Tissue Engineering, School of Stomatology, 3Department of Plastic and Reconstructive Surgery, Xijing Hospital, The Fourth Military Medical University, Shaanxi, People’s Republic of China Introduction: Periodontitis is a chronic infectious disease and is the major cause of tooth loss and other oral health issues around the world. Periodontal tissue regeneration has therefore always been the ultimate goal of dentists and researchers. Existing fabrication methods mainly focused on a top–down tissue engineering strategy in which several drawbacks remain, including low throughput and limited diffusion properties resulting from a large sample size. Gelatin methacrylate (GelMA) is a kind of photocrosslinkable and biocompatible hydrogel, with the capacities of enabling cell encapsulation and regeneration of functional tissues. Here, we developed a novel method to fabricate GelMA/nanohydroxylapatite (nHA) microgel arrays using a photocrosslinkable strategy. The viability, proliferation, and osteogenic differentiation and in vivo osteogenesis of human periodontal ligament stem cells (hPDLSCs) encapsulated in microgels were evaluated. The results suggested that such microgels provide great potential for periodontal tissue repair and regeneration. Methods: Microgel arrays were fabricated by blending different weight ratios of GelMA and nHA. hPDLSCs were encapsulated in GelMA/nHA microgels of various ratios for a systematic evaluation of cell viability, proliferation, and osteogenic differentiation. In vivo osteogenesis in nude mice was also studied. Results: The GelMA/nHA microgels exhibited appropriate microarchitecture, mechanical strength, and surface roughness, thus enabling cell adhesion and proliferation. Additionally, the GelMA/nHA microgels (10%/2% w/v) enhanced the osteogenic differentiation of hPDLSCs by elevating the expression levels of osteogenic biomarker genes, such as ALP, BSP, OCN, and RUNX2. In vivo ectopic transplantation results showed that GelMA/nHA microgels (10%/2% w/v) increased mineralized tissue formation with abundant vascularization, compared with the 1%, 3%, and the pure GelMA group. Conclusion: The GelMA/nHA microgels (10%/2% w/v) facilitated hPDLSCs viability, proliferation, and osteogenic differentiation in vitro and further promoted new bone formation in vivo, suggesting that the GelMA/nHA microgels (10%/2% w/v) provide great potential for periodontal tissue regeneration. Keywords: periodontal ligament stem cells, gelatin methacrylate, nanohydroxyapatite, microgel array, differentiation, periodontal tissue regeneration
format	article
author	Chen X Bai S Li B Liu H Wu G Liu S Zhao Y
author_facet	Chen X Bai S Li B Liu H Wu G Liu S Zhao Y
author_sort	Chen X
title	Fabrication of gelatin methacrylate/nanohydroxyapatite microgel arrays for periodontal tissue regeneration
title_short	Fabrication of gelatin methacrylate/nanohydroxyapatite microgel arrays for periodontal tissue regeneration
title_full	Fabrication of gelatin methacrylate/nanohydroxyapatite microgel arrays for periodontal tissue regeneration
title_fullStr	Fabrication of gelatin methacrylate/nanohydroxyapatite microgel arrays for periodontal tissue regeneration
title_full_unstemmed	Fabrication of gelatin methacrylate/nanohydroxyapatite microgel arrays for periodontal tissue regeneration
title_sort	fabrication of gelatin methacrylate/nanohydroxyapatite microgel arrays for periodontal tissue regeneration
publisher	Dove Medical Press
publishDate	2016
url	https://doaj.org/article/8844cebac281431482ac603ab71cabb2
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Fabrication of gelatin methacrylate/nanohydroxyapatite microgel arrays for periodontal tissue regeneration

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