1
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Vater C, Bräuer C, Grom S, Fecht T, Ahlfeld T, von Witzleben M, Placht AM, Schütz K, Schehl JM, Wolfram T, Reinauer F, Scharffenberg M, Wittenstein J, Hoess A, Heinemann S, Gelinsky M, Lauer G, Lode A. Poly(dl-lactide) Polymer Blended with Mineral Phases for Extrusion 3D Printing-Studies on Degradation and Biocompatibility. Polymers (Basel) 2024; 16:1254. [PMID: 38732723 PMCID: PMC11085512 DOI: 10.3390/polym16091254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/22/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024] Open
Abstract
A promising therapeutic option for the treatment of critical-size mandibular defects is the implantation of biodegradable, porous structures that are produced patient-specifically by using additive manufacturing techniques. In this work, degradable poly(DL-lactide) polymer (PDLLA) was blended with different mineral phases with the aim of buffering its acidic degradation products, which can cause inflammation and stimulate bone regeneration. Microparticles of CaCO3, SrCO3, tricalcium phosphates (α-TCP, β-TCP), or strontium-modified hydroxyapatite (SrHAp) were mixed with the polymer powder following processing the blends into scaffolds with the Arburg Plastic Freeforming 3D-printing method. An in vitro degradation study over 24 weeks revealed a buffer effect for all mineral phases, with the buffering capacity of CaCO3 and SrCO3 being the highest. Analysis of conductivity, swelling, microstructure, viscosity, and glass transition temperature evidenced that the mineral phases influence the degradation behavior of the scaffolds. Cytocompatibility of all polymer blends was proven in cell experiments with SaOS-2 cells. Patient-specific implants consisting of PDLLA + CaCO3, which were tested in a pilot in vivo study in a segmental mandibular defect in minipigs, exhibited strong swelling. Based on these results, an in vitro swelling prediction model was developed that simulates the conditions of anisotropic swelling after implantation.
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Affiliation(s)
- Corina Vater
- Centre for Translational Bone, Joint, and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine at Technische Universität Dresden, 01307 Dresden, Germany; (T.A.); (M.v.W.); (A.-M.P.); (K.S.); (M.G.)
| | - Christian Bräuer
- Department of Oral and Maxillofacial Surgery, University Hospital Carl Gustav Carus at Technische Universität Dresden, 01307 Dresden, Germany; (C.B.); (G.L.)
| | - Stefanie Grom
- KLS Martin SE & Co. KG, 78570 Mühlheim, Germany; (S.G.); (T.F.); (J.M.S.); (T.W.); (F.R.)
| | - Tatjana Fecht
- KLS Martin SE & Co. KG, 78570 Mühlheim, Germany; (S.G.); (T.F.); (J.M.S.); (T.W.); (F.R.)
| | - Tilman Ahlfeld
- Centre for Translational Bone, Joint, and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine at Technische Universität Dresden, 01307 Dresden, Germany; (T.A.); (M.v.W.); (A.-M.P.); (K.S.); (M.G.)
| | - Max von Witzleben
- Centre for Translational Bone, Joint, and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine at Technische Universität Dresden, 01307 Dresden, Germany; (T.A.); (M.v.W.); (A.-M.P.); (K.S.); (M.G.)
| | - Anna-Maria Placht
- Centre for Translational Bone, Joint, and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine at Technische Universität Dresden, 01307 Dresden, Germany; (T.A.); (M.v.W.); (A.-M.P.); (K.S.); (M.G.)
| | - Kathleen Schütz
- Centre for Translational Bone, Joint, and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine at Technische Universität Dresden, 01307 Dresden, Germany; (T.A.); (M.v.W.); (A.-M.P.); (K.S.); (M.G.)
| | - Jan Marc Schehl
- KLS Martin SE & Co. KG, 78570 Mühlheim, Germany; (S.G.); (T.F.); (J.M.S.); (T.W.); (F.R.)
| | - Tobias Wolfram
- KLS Martin SE & Co. KG, 78570 Mühlheim, Germany; (S.G.); (T.F.); (J.M.S.); (T.W.); (F.R.)
| | - Frank Reinauer
- KLS Martin SE & Co. KG, 78570 Mühlheim, Germany; (S.G.); (T.F.); (J.M.S.); (T.W.); (F.R.)
| | - Martin Scharffenberg
- Pulmonary Engineering Group, Department of Anesthesiology and Intensive Care Medicine, University Hospital Carl Gustav Carus at Technische Universität Dresden, 01307 Dresden, Germany; (M.S.); (J.W.)
| | - Jakob Wittenstein
- Pulmonary Engineering Group, Department of Anesthesiology and Intensive Care Medicine, University Hospital Carl Gustav Carus at Technische Universität Dresden, 01307 Dresden, Germany; (M.S.); (J.W.)
| | - Andreas Hoess
- INNOTERE GmbH, 01445 Radebeul, Germany; (A.H.); (S.H.)
| | | | - Michael Gelinsky
- Centre for Translational Bone, Joint, and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine at Technische Universität Dresden, 01307 Dresden, Germany; (T.A.); (M.v.W.); (A.-M.P.); (K.S.); (M.G.)
| | - Günter Lauer
- Department of Oral and Maxillofacial Surgery, University Hospital Carl Gustav Carus at Technische Universität Dresden, 01307 Dresden, Germany; (C.B.); (G.L.)
| | - Anja Lode
- Centre for Translational Bone, Joint, and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine at Technische Universität Dresden, 01307 Dresden, Germany; (T.A.); (M.v.W.); (A.-M.P.); (K.S.); (M.G.)
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2
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Ahlfeld T, Lode A, Placht AM, Fecht T, Wolfram T, Grom S, Hoess A, Vater C, Bräuer C, Heinemann S, Lauer G, Reinauer F, Gelinsky M. A comparative analysis of 3D printed scaffolds consisting of poly(lactic- co-glycolic) acid and different bioactive mineral fillers: aspects of degradation and cytocompatibility. Biomater Sci 2023; 11:5590-5604. [PMID: 37403758 DOI: 10.1039/d2bm02071h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2023]
Abstract
Their excellent mechanical properties, degradability and suitability for processing by 3D printing technologies make the thermoplastic polylactic acid and its derivatives favourable candidates for biomaterial-based bone regeneration therapies. In this study, we investigated whether bioactive mineral fillers, which are known to promote bone healing based on their dissolution products, can be integrated into a poly(L-lactic-co-glycolic) acid (PLLA-PGA) matrix and how key characteristics of degradation and cytocompatibility are influenced. The polymer powder was mixed with particles of CaCO3, SrCO3, strontium-modified hydroxyapatite (SrHAp) or tricalcium phosphates (α-TCP, β-TCP) in a mass ratio of 90 : 10; the resulting composite materials have been successfully processed into scaffolds by the additive manufacturing method Arburg Plastic Freeforming (APF). Degradation of the composite scaffolds was investigated in terms of dimensional change, bioactivity, ion (calcium, phosphate, strontium) release/uptake and pH development during long-term (70 days) incubation. The mineral fillers influenced the degradation behavior of the scaffolds to varying degrees, with the calcium phosphate phases showing a clear buffer effect and an acceptable dimensional increase. The amount of 10 wt% SrCO3 or SrHAp particles did not appear to be appropriate to release a sufficient amount of strontium ions to exert a biological effect in vitro. Cell culture experiments with the human osteosarcoma cell line SAOS-2 and human dental pulp stem cells (hDPSC) indicated the high cytocompatibility of the composites: For all material groups cell spreading and complete colonization of the scaffolds over the culture period of 14 days as well as an increase of the specific alkaline phosphatase activity, typical for osteogenic differentiation, were observed.
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Affiliation(s)
- Tilman Ahlfeld
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.
| | - Anja Lode
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.
| | - Anna-Maria Placht
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.
| | - Tatjana Fecht
- Karl Leibinger Medizintechnik GmbH & Co. KG (KLS Martin Group), Germany
| | - Tobias Wolfram
- Karl Leibinger Medizintechnik GmbH & Co. KG (KLS Martin Group), Germany
| | - Stefanie Grom
- Karl Leibinger Medizintechnik GmbH & Co. KG (KLS Martin Group), Germany
| | | | - Corina Vater
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.
| | - Christian Bräuer
- Department of Oral and Maxillofacial Surgery, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | | | - Günter Lauer
- Department of Oral and Maxillofacial Surgery, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Frank Reinauer
- Karl Leibinger Medizintechnik GmbH & Co. KG (KLS Martin Group), Germany
| | - Michael Gelinsky
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.
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3
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Umemoto S, Furusawa T, Unuma H, Tajika M, Sekino T. In vivo bioresorbability and bone formation ability of sintered highly pure calcium carbonate granules. Dent Mater J 2021; 40:1202-1207. [PMID: 34121021 DOI: 10.4012/dmj.2020-254] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Calcium carbonate-based bone substitutes derived from natural coral exoskeleton (aragonite) are resorbed and remodeled faster than calcium phosphate-based substitutes. However, coral species with structures appropriate for use as bone substitutes are very limited. Therefore, it is important to evaluate potential of artificial calcium carbonate ceramics as a bone substitute. In this study, calcium carbonate granules with various porosities and pore sizes were prepared by sintering a highly pure (>99.98%) calcium carbonate powder (calcite), and their resorption properties and bone formation abilities were examined in vivo for the first time. The sintered calcium carbonate was resorbed faster than β-tricalcium phosphate, which has a similar structure. However, sintered calcium carbonate did not promote new bone formation during long-term implantation. Furthermore, both resorption and new bone formation were affected by the pore structure. The optimal structures of the artificially sintered calcium carbonate bone substitute were also discussed.
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Affiliation(s)
- Shota Umemoto
- Shiraishi Central Laboratories Co., Ltd.,The Institute of Scientific and Industrial Research, Osaka University
| | - Toshitake Furusawa
- Tohoku Oral Implant Association.,Graduate School of Science and Engineering, Yamagata University
| | - Hidero Unuma
- Tohoku Oral Implant Association.,Graduate School of Science and Engineering, Yamagata University
| | | | - Tohru Sekino
- The Institute of Scientific and Industrial Research, Osaka University
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4
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Xu W, Zhao R, Wu T, Li G, Wei K, Wang L. Biodegradable calcium carbonate/mesoporous silica/poly(lactic-glycolic acid) microspheres scaffolds with osteogenesis ability for bone regeneration. RSC Adv 2021; 11:5055-5064. [PMID: 35424439 PMCID: PMC8694637 DOI: 10.1039/d0ra09958a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/18/2021] [Indexed: 11/21/2022] Open
Abstract
Sintered microsphere-based scaffolds provide a porous structure and high-resolution spatial organization control, show great potential for bone regeneration, mainly from biodegradable biomaterials including poly(lactic-glycolic acid) (PLGA). However, acidic monomer regeneration, mainly from biodegradable biomaterials including poly(lactic-glycolic acid) (PLGA). However, acidic monomers generated by PLGA degradation tend to cause tissue inflammation, which is the central issue of PLGA-based bone regeneration scaffolds development. In this work, calcium carbonate (CC)/hexagonal mesoporous silica (HMS)/PLGA sintered microsphere-based scaffolds were developed. The scaffolds possessed a three-dimensional (3D) network structure and 30–40% porosity. The degradation results indicated that CC/HMS/PLGA scaffolds could compensate for pH increased caused by PLGA acidic byproducts effectively. Degradation results showed that CC/HMS/PLGA scaffold could effectively compensate for the pH increase caused by PLGA acidic by-products. Composite CC additives can induce the increase of adhesive proteins in the environment, which is conducive to the adhesion of cells to scaffolds. Mesenchymal stem cells (MSCs) proliferation and osteogenic differentiation were evaluated by CCK-8 assay, alkaline phosphatase (ALP) activity, ALP staining, and Alizarin Red staining. The results showed that compared with HMS/PLGA scaffolds, the proliferation of MSCs cultured with CC/HMS/PLGA scaffolds was enhanced. When cultured on the CC/HMS/PLGA scaffolds, MSCs also showed significantly enhanced ALP activity and higher calcium secretion compared with the HMS/PLGA scaffolds. CC/HMS/PLGA sintered microsphere-based scaffolds provides an attractive strategy for bone repair and regeneration with better performance. Sintered microsphere-based scaffolds provide a porous structure and high-resolution spatial organization control, show great potential for bone regeneration, mainly from biodegradable biomaterials including poly(lactic-glycolic acid) (PLGA).![]()
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Affiliation(s)
- Weikang Xu
- Department of Scientific Research, National Engineering Research Center for Healthcare Devices, Guangdong Key Lab of Medical Electronic Instruments and Polymer Material Products, Guangdong Institute of Medical Instruments, Institute of Health Medicine, Guangdong Academy of Sciences No. 1307 Guangzhou Avenue Central, Tianhe District Guangzhou Guangdong 510500 China +86-757-87-02-35-80.,Guangdong Provincial Bioengineering Institute (Guangzhou Sugarcane Industry Research Institute), Guangdong Academy of Sciences Jianghai Avenue Central, Haizhu District Guangzhou Guangdong 510316 China.,National Engineering Research Center for Human Tissue Restoration and Function Reconstruction, South China University of Technology Wushan Road 381 Guangzhou Guangdong 510006 China +86-757-39-38-00-98
| | - Ruifang Zhao
- Department of Scientific Research, National Engineering Research Center for Healthcare Devices, Guangdong Key Lab of Medical Electronic Instruments and Polymer Material Products, Guangdong Institute of Medical Instruments, Institute of Health Medicine, Guangdong Academy of Sciences No. 1307 Guangzhou Avenue Central, Tianhe District Guangzhou Guangdong 510500 China +86-757-87-02-35-80
| | - Tingting Wu
- Department of Scientific Research, National Engineering Research Center for Healthcare Devices, Guangdong Key Lab of Medical Electronic Instruments and Polymer Material Products, Guangdong Institute of Medical Instruments, Institute of Health Medicine, Guangdong Academy of Sciences No. 1307 Guangzhou Avenue Central, Tianhe District Guangzhou Guangdong 510500 China +86-757-87-02-35-80
| | - Guixiang Li
- Department of Scientific Research, National Engineering Research Center for Healthcare Devices, Guangdong Key Lab of Medical Electronic Instruments and Polymer Material Products, Guangdong Institute of Medical Instruments, Institute of Health Medicine, Guangdong Academy of Sciences No. 1307 Guangzhou Avenue Central, Tianhe District Guangzhou Guangdong 510500 China +86-757-87-02-35-80
| | - Kun Wei
- National Engineering Research Center for Human Tissue Restoration and Function Reconstruction, South China University of Technology Wushan Road 381 Guangzhou Guangdong 510006 China +86-757-39-38-00-98
| | - Liyan Wang
- Department of Stomatology, Foshan Woman and Children's Hospital No. 11 Renmin Xi Road, Chancheng District Foshan Guangdong 528000 China +86-757-82-96-97-89
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5
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Kim D, Han TH, Hong SC, Park SJ, Lee YH, Kim H, Park M, Lee J. PLGA Microspheres with Alginate-Coated Large Pores for the Formulation of an Injectable Depot of Donepezil Hydrochloride. Pharmaceutics 2020; 12:E311. [PMID: 32244736 PMCID: PMC7238133 DOI: 10.3390/pharmaceutics12040311] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 03/27/2020] [Accepted: 03/30/2020] [Indexed: 11/25/2022] Open
Abstract
As the main symptom of Alzheimer's disease-related dementia is memory loss, patient compliance for donepezil hydrochloride (donepezil), administered as once-daily oral formulations, is poor. Thus, we aimed to design poly(lactic-co-glycolic acid) (PLGA) microspheres (MS) with alginate-coated large pores as an injectable depot of donepezil exhibiting sustained release over 2-3 weeks. The PLGA MS with large pores could provide large space for loading drugs with high loading capacity, and thereby sufficient amounts of drugs were considered to be delivered with minimal use of PLGA MS being injected. However, initial burst release of donepezil from the porous PLGA MS was observed. To reduce this initial burst release, the surface pores were closed with calcium alginate coating using a spray-ionotropic gelation method. The final pore-closed PLGA MS showed in vitro sustained release for approximately 3 weeks, and the initial burst release was remarkably decreased by the calcium alginate coating. In the prediction of plasma drug concentration profiles using convolution method, the mean residence time of the pore-closed PLGA MS was 2.7-fold longer than that of the porous PLGA MS. Therefore, our results reveal that our pore-closed PLGA MS formulation is a promising candidate for the treatment of dementia with high patient compliance.
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Affiliation(s)
| | | | | | | | | | | | | | - Jaehwi Lee
- College of Pharmacy, Chung-Ang University, Seoul 06974, Korea; (D.K.); (T.H.H.); (S.-C.H.); (S.J.P.); (Y.H.L.); (H.K.); (M.P.)
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6
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Cao X, Li W, Fan Y, Dong H. Effective Enzyme Coimmobilization and Synergistic Catalysis on Hierarchically Porous Inorganic/Organic Hybrid Microbeads Fabricated Via Droplet-Based Microfluidics. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201800106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xiaodong Cao
- Department of Biomedical Engineering; School of Materials Science and Engineering; South China University of Technology; Guangzhou 510006 China
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR); Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510641 China
| | - Wenxiu Li
- Department of Biomedical Engineering; School of Materials Science and Engineering; South China University of Technology; Guangzhou 510006 China
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR); Guangzhou 510006 China
| | - Yimei Fan
- Department of Biomedical Engineering; School of Materials Science and Engineering; South China University of Technology; Guangzhou 510006 China
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR); Guangzhou 510006 China
| | - Hua Dong
- Department of Biomedical Engineering; School of Materials Science and Engineering; South China University of Technology; Guangzhou 510006 China
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR); Guangzhou 510006 China
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7
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Hou J, Zhang F, Cheng D, Shi X, Cao X. Mineralization of a superficially porous microsphere scaffold via plasma modification. RSC Adv 2017. [DOI: 10.1039/c6ra25256g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel porous mineralization layers were obtained on scaffolds. The plasma process could enhance the bonding force between apatite and the substrate surface.
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Affiliation(s)
- Jie Hou
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
- National Engineering Research Centre for Tissue Restoration and Reconstruction
| | - Fen Zhang
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
- National Engineering Research Centre for Tissue Restoration and Reconstruction
| | - Delin Cheng
- Centre for Human Tissue and Organ Degeneration
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen 518055
- China
| | - Xuetao Shi
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
- National Engineering Research Centre for Tissue Restoration and Reconstruction
| | - Xiaodong Cao
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
- National Engineering Research Centre for Tissue Restoration and Reconstruction
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8
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Gao T, Cui W, Wang Z, Wang Y, Liu Y, Malliappan PS, Ito Y, Zhang P. Photo-immobilization of bone morphogenic protein 2 on PLGA/HA nanocomposites to enhance the osteogenesis of adipose-derived stem cells. RSC Adv 2016. [DOI: 10.1039/c5ra27914c] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Poly(lactide-co-glycolide) and nano-hydroxyapatite composites are surface-modified with BMP-2 via photo-reactive gelatin to make the composites exhibit excellent bioactivities for the adhesion, proliferation and osteogenic differentiation of ADSCs.
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Affiliation(s)
- Tianlin Gao
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Weiwei Cui
- School of Public Health
- Jilin University
- Changchun
- P. R. China
| | - Zongliang Wang
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Yu Wang
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Ya Liu
- School of Public Health
- Jilin University
- Changchun
- P. R. China
| | | | - Yoshihiro Ito
- Nano Medical Engineering Laboratory
- RIKEN
- Saitama 351-0198
- Japan
- Emergent Bioengineering Materials Research Team
| | - Peibiao Zhang
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
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9
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Kim Y, Kim H, Sah H. Methylamine acts as excellent chemical trigger to Harden emulsion droplets into spongy PLGA microspheres. RSC Adv 2016. [DOI: 10.1039/c6ra17576g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A unique approach using methylamine as a chemical trigger leads to the formation of sponge-like PLGA microspheres with extreme porosity.
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Affiliation(s)
- Yuyoung Kim
- College of Pharmacy
- Ewha Womans University
- Sedaemun-gu
- Republic of Korea
| | - Hansol Kim
- College of Pharmacy
- Ewha Womans University
- Sedaemun-gu
- Republic of Korea
| | - Hongkee Sah
- College of Pharmacy
- Ewha Womans University
- Sedaemun-gu
- Republic of Korea
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10
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Cheng D, Hou J, Hao L, Cao X, Gao H, Fu X, Wang Y. Bottom-up topography assembly into 3D porous scaffold to mediate cell activities. J Biomed Mater Res B Appl Biomater 2015; 104:1056-63. [DOI: 10.1002/jbm.b.33452] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 03/22/2015] [Accepted: 05/02/2015] [Indexed: 01/08/2023]
Affiliation(s)
- Delin Cheng
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510641 China
- National Engineering Research Center for Tissue Restoration and Reconstruction; Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510006 China
| | - Jie Hou
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510641 China
- National Engineering Research Center for Tissue Restoration and Reconstruction; Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510006 China
| | - Lijing Hao
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510641 China
- National Engineering Research Center for Tissue Restoration and Reconstruction; Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510006 China
| | - Xiaodong Cao
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510641 China
- National Engineering Research Center for Tissue Restoration and Reconstruction; Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510006 China
| | - Huichang Gao
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510641 China
- National Engineering Research Center for Tissue Restoration and Reconstruction; Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510006 China
| | - Xiaoling Fu
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510641 China
- National Engineering Research Center for Tissue Restoration and Reconstruction; Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510006 China
| | - Yingjun Wang
- School of Materials Science and Engineering; South China University of Technology; Guangzhou 510641 China
- National Engineering Research Center for Tissue Restoration and Reconstruction; Guangzhou 510006 China
- Guangdong Province Key Laboratory of Biomedical Engineering; South China University of Technology; Guangzhou 510006 China
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11
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Gagliardi M, Di Michele F, Mazzolai B, Bifone A. Chemical synthesis of a biodegradable PEGylated copolymer from ε-caprolactone and γ-valerolactone: evaluation of reaction and functional properties. JOURNAL OF POLYMER RESEARCH 2015. [DOI: 10.1007/s10965-015-0661-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Cheng D, Cao X, Gao H, Hou J, Li W, Hao L, Wang Y. Engineering poly(lactic-co-glycolic acid)/hydroxyapatite microspheres with diverse macropores patterns and the cellular responses. RSC Adv 2015. [DOI: 10.1039/c4ra15561k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Design macroporous topography on spherical substrates via a straightforward approach and investigate the corresponding cell responses.
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Affiliation(s)
- D. Cheng
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
- National Engineering Research Center for Tissue Restoration and Reconstruction
| | - X. Cao
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
- National Engineering Research Center for Tissue Restoration and Reconstruction
| | - H. Gao
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
- National Engineering Research Center for Tissue Restoration and Reconstruction
| | - J. Hou
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
- National Engineering Research Center for Tissue Restoration and Reconstruction
| | - W. Li
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
- National Engineering Research Center for Tissue Restoration and Reconstruction
| | - L. Hao
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
- National Engineering Research Center for Tissue Restoration and Reconstruction
| | - Y. Wang
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
- National Engineering Research Center for Tissue Restoration and Reconstruction
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Nie J, Wang Z, Zhang J, Yang L, Pang Y, Hu Q. High strength chitosan rod prepared via LiOH/urea solvent through centrifugation induced orientation processing. RSC Adv 2015. [DOI: 10.1039/c5ra07929b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
High strength chitosan rod prepared via LiOH/urea solvent utilizing the unique centrifugation induced orientation method.
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Affiliation(s)
- Jingyi Nie
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Zhengke Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Jiazhen Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Ling Yang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Yichuan Pang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Qiaoling Hu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
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14
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Fan JB, Song Y, Wang S, Jiang L, Zhu MQ, Guo X. A synergy effect between the hydrophilic PEG and rapid solvent evaporation induced formation of tunable porous microspheres from a triblock copolymer. RSC Adv 2014. [DOI: 10.1039/c3ra44197k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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15
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Cheng D, Cao X, Gao H, Ye X, Li W, Wang Y. Engineering PLGA doped PCL microspheres with a layered architecture and an island–sea topography. RSC Adv 2014. [DOI: 10.1039/c3ra45274c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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16
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Cheng D, Cao X, Gao H, Wang Y. Engineering poly(lactic-co-glycolic acid)/calcium carbonate microspheres with controllable topography and their cell response. J Mater Chem B 2013; 1:3322-3329. [DOI: 10.1039/c3tb20284d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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