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Ng P, Pinho AR, Gomes MC, Demidov Y, Krakor E, Grume D, Herb M, Lê K, Mano J, Mathur S, Maleki H. Fabrication of Antibacterial, Osteo-Inductor 3D Printed Aerogel-Based Scaffolds by Incorporation of Drug Laden Hollow Mesoporous Silica Microparticles into the Self-Assembled Silk Fibroin Biopolymer. Macromol Biosci 2022; 22:e2100442. [PMID: 35029037 DOI: 10.1002/mabi.202100442] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 12/22/2021] [Indexed: 02/06/2023]
Abstract
In this study, the novel biomimetic aerogel-based composite scaffolds through a synergistic combination of wet chemical synthesis and advanced engineering approaches have successfully designed. To this aim, initially the photo-crosslinkable methacrylated silk fibroin (SF-MA) biopolymer and methacrylated hollow mesoporous silica microcapsules (HMSC-MA) as the main constituents of the novel composite aerogels were synthesized. Afterward, by incorporation of drug-loaded HMSC-MA into the self-assembled SF-MA, printable gel-based composite inks are developed. By exploiting micro-extrusion-based three-dimensional (3D) printing, SF-MA-HMSC composite gels are printed by careful controlling their viscosity to provide a means to control the shape fidelity of the resulted printed gel constructs. The developed scaffold has shown a multitude of interesting biophysical and biological performances. Namely, thanks to the photo-crosslinking of the gel components during the 3D printing, the scaffolds become mechanically more stable than the pristine SF scaffolds. Also, freeze-casting the printed constructs generates further interconnectivity in the printed pore struts resulting in the scaffolds with hierarchically organized porosities necessary for cell infiltration and growth. Importantly, HMSC incorporated scaffolds promote antibacterial drug delivery, cellular ingrowth and proliferation, promoting osteoblastic differentiation by inducing the expression of osteogenic markers and matrix mineralization. Finally, the osteoconductive, -inductive, and anti-infective composite aerogels are expected to act as excellent bone implanting materials with an extra feature of local and sustained release of drug for efficient therapy of bone-related diseases.
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Affiliation(s)
- Philipp Ng
- Institute of Inorganic Chemistry, Department of Chemistry, University of Cologne, Greinstraße 6, 50939, Cologne, Germany
| | - Ana Rita Pinho
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
| | - Maria C Gomes
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
| | - Yan Demidov
- Institute of Inorganic Chemistry, Department of Chemistry, University of Cologne, Greinstraße 6, 50939, Cologne, Germany
| | - Eva Krakor
- Institute of Inorganic Chemistry, Department of Chemistry, University of Cologne, Greinstraße 6, 50939, Cologne, Germany
| | - Daniela Grume
- Institute for Medical Microbiology, Immunology and Hygiene, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50935, Cologne, Germany
| | - Marc Herb
- Institute for Medical Microbiology, Immunology and Hygiene, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50935, Cologne, Germany
| | - Khan Lê
- Institute of Inorganic Chemistry, Department of Chemistry, University of Cologne, Greinstraße 6, 50939, Cologne, Germany
| | - João Mano
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
| | - Sanjay Mathur
- Institute of Inorganic Chemistry, Department of Chemistry, University of Cologne, Greinstraße 6, 50939, Cologne, Germany
| | - Hajar Maleki
- Institute of Inorganic Chemistry, Department of Chemistry, University of Cologne, Greinstraße 6, 50939, Cologne, Germany
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Mouriño V, Vidotto R, Cattalini J, Boccaccini A. Enhancing biological activity of bioactive glass scaffolds by inorganic ion delivery for bone tissue engineering. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2019. [DOI: 10.1016/j.cobme.2019.02.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Sun J, Wu T, Fan Q, Hu Q, Shi B. Comparative study of hydroxyapatite, fluor-hydroxyapatite and Si-substituted hydroxyapatite nanoparticles on osteogenic, osteoclastic and antibacterial ability. RSC Adv 2019; 9:16106-16118. [PMID: 35521374 PMCID: PMC9064369 DOI: 10.1039/c9ra00839j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 03/21/2019] [Indexed: 12/30/2022] Open
Abstract
This study compared the effects of hydroxyapatite (HA), fluor-hydroxyapatite (FHA) and Si-substituted hydroxyapatite (SiHA) on osteogenic differentiation, osteoclastic activity and antibacterial properties. HA, FHA and SiHA were prepared via a sol-gel reaction and characterized by scanning electron microscopic analysis (SEM), transmission electron microscopic analysis (TEM), and X-ray photoelectron spectrometry. Cell proliferation was evaluated using an MTT assay and cytoskeletal morphology was observed by fluorescence microscopy. Osteogenic differentiation was evaluated using alkaline phosphatase activity and Alizarin red staining. Quantitative real-time PCR was used to evaluate the mRNA expression of runt-related transcription factor 2 (Runx2) and osteopontin (OPN). New bone formation was tested using μCT, haematoxylin and eosin staining and TRAP staining. The antibacterial actions against Porphyromonas gingivalis (P. g) were evaluated through plate counting and live-dead bacterial staining. The results demonstrated that HA, FHA and SiHA can promote proliferation of bone mesenchymal stem cells (BMSCs). ALP activity in FHA extract with a concentration of 625 μg mL-1 was the highest after 14 days osteogenic induction; similar results were observed for Runx2 and OPN mRNA expression. HA, FHA and SiHA decreased trabecular space in bone defects, but FHA reduced osteoclastic activity and inhibited P. g growth. In conclusion, FHA can promote osteogenic activity, reduce osteoclastic activity and enhance antibacterial effects.
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Affiliation(s)
- Jing Sun
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University Wuhan 430079 CN China
| | - Tao Wu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University Wuhan 430079 CN China
| | - Qihang Fan
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University Wuhan 430079 CN China
| | - Qing Hu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University Wuhan 430079 CN China
| | - Bin Shi
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University Wuhan 430079 CN China
- Department of Dental Implantology, School and Hospital of Stomatology, Wuhan University China
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Yang X, Li Y, Liu X, Huang Q, Zhang R, Feng Q. Incorporation of silica nanoparticles to PLGA electrospun fibers for osteogenic differentiation of human osteoblast-like cells. Regen Biomater 2018; 5:229-238. [PMID: 30094062 PMCID: PMC6077779 DOI: 10.1093/rb/rby014] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 05/14/2018] [Accepted: 05/16/2018] [Indexed: 12/13/2022] Open
Abstract
The development of bone tissue engineering scaffolds still remains a challenging field, although various biomaterials have been developed for this purpose. Electrospinning is a promising approach to fabricate nanofibers with an interconnected porous structure, which can support cell adhesion, guide cell proliferation and regulate cell differentiation. The aim of this study is to fabricate composite fibers composed of poly(lactic-co-glycolic acid) (PLGA) and silica nanoparticles (NPs) via electrospinning and investigate the effect of PLGA/SiO2 composite fibers on the cellular response of osteoblast-like cells (SaOS-2 cells). SEM and EDX analysis showed that silica NPs were homogenously dispersed in the composite fibers. The mechanical behavior of the fibers showed that silica NPs acted as reinforcements at concentrations of 2.5 and 5 mg/ml. The incorporation of silica NPs led to enhancement of cell attachment and spreading on PLGA/SiO2 composite fibers. SaOS-2 cells cultured on PLGA/SiO2 composite fibers exhibited increased alkaline phosphatase activity, collagen secretion and bone nodules formation. The bone nodules formation of SaOS-2 cells increased along with the amount of incorporated silica NPs. The present findings indicate that PLGA/SiO2 composite fibers can stimulate osteogenic differentiation of SaOS-2 cells and may be a promising candidate scaffold for bone tissue engineering.
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Affiliation(s)
- Xing Yang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Yuanyuan Li
- Department of Stomatology, Shengli Oilfield Central Hospital, Dongying, China
| | - Xujie Liu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
- Graduate School at Shenzhen, Tsinghua University, Shenzhen, China
| | - Qianli Huang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China
| | - Ranran Zhang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Qingling Feng
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
- Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, China
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Dicalcium Silicate Induced Proinflammatory Responses through TLR2-Mediated NF- κB and JNK Pathways in the Murine RAW 264.7 Macrophage Cell Line. Mediators Inflamm 2018; 2018:8167932. [PMID: 29853794 PMCID: PMC5954956 DOI: 10.1155/2018/8167932] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 03/08/2018] [Indexed: 11/21/2022] Open
Abstract
Proinflammatory responses are important aspects of the immune response to biomaterials, which may cause peri-implantitis and implant shedding. The purpose of this study was to test the cytotoxicity and proinflammatory effects of dicalcium silicate particles on RAW 264.7 macrophages and to investigate the proinflammatory response mechanism induced by C2S and tricalcium phosphate (TCP). C2S and TCP particles were characterized using scanning electron microscopy (SEM), energy spectrum analysis (EDS) and X-ray diffraction (XRD). Cytotoxicity and apoptosis assays with C2S and TCP in the murine RAW 264.7 cell line were tested using the cell counting kit-8 (CCK-8) assay and flow cytometry (FCM). The detection results showed that C2S and TCP particles had no obvious toxicity in RAW 264.7 cells and did not cause obvious apoptosis, although they both caused an oxidative stress response by producing ROS when the concentrations were at 100 μg/mL. C2S particles are likely to induce a proinflammatory response by inducing high TLR2, TNF-α mRNA, TNF-α proinflammatory cytokine, p-IκB, and p-JNK1 + JNK2 + JNK3 expression levels. When we added siRNA-TLR2-1, a significant reduction was observed. These findings support the theory that C2S particles induce proinflammatory responses through the TLR2-mediated NF-κB and JNK pathways in the murine RAW 264.7 macrophage cell line.
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Nikpour P, Salimi-Kenari H, Fahimipour F, Rabiee SM, Imani M, Dashtimoghadam E, Tayebi L. Dextran hydrogels incorporated with bioactive glass-ceramic: Nanocomposite scaffolds for bone tissue engineering. Carbohydr Polym 2018; 190:281-294. [DOI: 10.1016/j.carbpol.2018.02.083] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 02/13/2018] [Accepted: 02/26/2018] [Indexed: 12/22/2022]
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7
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Wu Z, Xu Y, Li H. Synergetic stimulation of nanostructure and chemistry cues on behaviors of fibroblasts and endothelial cells. Colloids Surf B Biointerfaces 2017; 160:500-509. [DOI: 10.1016/j.colsurfb.2017.10.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 09/15/2017] [Accepted: 10/01/2017] [Indexed: 12/11/2022]
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Haro Durand LA, Vargas GE, Vera-Mesones R, Baldi A, Zago MP, Fanovich MA, Boccaccini AR, Gorustovich A. In Vitro Human Umbilical Vein Endothelial Cells Response to Ionic Dissolution Products from Lithium-Containing 45S5 Bioactive Glass. MATERIALS (BASEL, SWITZERLAND) 2017; 10:E740. [PMID: 28773103 PMCID: PMC5551783 DOI: 10.3390/ma10070740] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 06/24/2017] [Accepted: 06/29/2017] [Indexed: 12/27/2022]
Abstract
Since lithium (Li⁺) plays roles in angiogenesis, the localized and controlled release of Li⁺ ions from bioactive glasses (BGs) represents a promising alternative therapy for the regeneration and repair of tissues with a high degree of vascularization. Here, microparticles from a base 45S5 BG composition containing (wt %) 45% SiO₂, 24.5% Na₂O, 24.5% CaO, and 6% P₂O₅, in which Na₂O was partially substituted by 5% Li₂O (45S5.5Li), were obtained. The results demonstrate that human umbilical vein endothelial cells (HUVECs) have greater migratory and proliferative response and ability to form tubules in vitro after stimulation with the ionic dissolution products (IDPs) of the 45S5.5Li BG. The results also show the activation of the canonical Wnt/β-catenin pathway and the increase in expression of proangiogenic cytokines insulin like growth factor 1 (IGF1) and transforming growth factor beta (TGFβ). We conclude that the IDPs of 45S5.5Li BG would act as useful inorganic agents to improve tissue repair and regeneration, ultimately stimulating HUVECs behavior in the absence of exogenous growth factors.
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Affiliation(s)
- Luis A Haro Durand
- Department of Pathology and Molecular Pharmacology, IByME-CONICET, C1428ADN Buenos Aires, Argentina.
| | - Gabriela E Vargas
- Department of Developmental Biology, National University of Salta, A4408FVY Salta, Argentina.
| | - Rosa Vera-Mesones
- Department of Developmental Biology, National University of Salta, A4408FVY Salta, Argentina.
| | - Alberto Baldi
- Department of Pathology and Molecular Pharmacology, IByME-CONICET, C1428ADN Buenos Aires, Argentina.
| | - María P Zago
- Institute of Experimental Pathology, IPE-CONICET, A4408FVY Salta, Argentina.
| | - María A Fanovich
- Research Institute for Materials Science and Technology, INTEMA-CONICET, B7608FDQ Mar del Plata, Argentina.
| | - Aldo R Boccaccini
- Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany.
| | - Alejandro Gorustovich
- Interdisciplinary Materials Group-IESIING-UCASAL, INTECIN UBA-CONICET, A4400EDD Salta, Argentina.
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Yang X, Li Y, Liu X, Huang Q, He W, Zhang R, Feng Q, Benayahu D. The stimulatory effect of silica nanoparticles on osteogenic differentiation of human mesenchymal stem cells. ACTA ACUST UNITED AC 2016; 12:015001. [PMID: 27910816 DOI: 10.1088/1748-605x/12/1/015001] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Silica-based materials with favourable biocompatibility are generally considered as excellent candidates for applications in biomedical fields. However, previous researches mainly focused on the safety of silica-based materials, their effects on osteogenic differentiation of human mesenchymal stem cells (hMSCs) still need further investigations. In this study, core-shell fluorescent silica nanoparticles (silica NPs) with three different sizes (S1 ~ 50 nm, S2 ~ 200 nm, S3 ~ 400 nm, respectively) were prepared according to the Stöber method. The silica NPs with different sizes did not affect the cell viability (even up to a concentration of 500 µg ml-1), showing size- and dose-independent cytocompatibility of silica NPs on hMSCs. Uptake of silica NPs significantly enhanced the activity of alkaline phosphatase (ALP) and the formation of bone-like nodules of hMSCs after osteogenic induction. At the concentration of 10 µg ml-1, after treating hMSCs with larger sized silica NPs (S2 and S3), higher ALP activity of hMSCs was measured and larger sized bone-like nodules were formed by hMSCs compared with that treated with smaller sized silica NPs (S1).The enhanced osteogenic potential of hMSCs treated with silica NPs may be attributed to the Si released from silica NPs due to the lysosomal degradation inside hMSCs. These results demonstrate the stimulatory effect of silica NPs on osteogenic differentiation of hMSCs and the application potential of silica NPs in bone tissue engineering.
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Affiliation(s)
- Xing Yang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
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Chen L, Zhang Y, Liu J, Wei L, Song B, Shao L. Exposure of the murine RAW 264.7 macrophage cell line to dicalcium silicate coating: assessment of cytotoxicity and pro-inflammatory effects. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:59. [PMID: 26800690 DOI: 10.1007/s10856-016-5668-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 01/08/2016] [Indexed: 06/05/2023]
Abstract
Inflammatory effects are significant elements of the immune response to biomaterials. Previously, we reported inflammatory effects in response to dicalcium silicate (Ca2SiO4, C2S) particles. However, the immunological effects of C2S coatings have not been studied. C2S often used as coatings materials in orthopedic and dentistry applications. It may have different effect from C2S particles. Further, it remains unclear whether C2S coating is equally biocompatible as 45S5 coating. The aim of this study was to test the cytotoxicity and pro-inflammatory effects of C2S coating on RAW 264.7 macrophages. C2S and 45S5 coatings were characterized using scanning electron microscopy (SEM), atomic force microscopy (AFM), energy dispersive analysis (EDS) and X-ray diffraction (XRD). inductively coupled plasma optical emission spectroscopy (ICP-OES) was used to detect ionic concentrations after soaking coated discs in medium. The cytotoxicity of C2S and 45S5 coatings against RAW 264.7 macrophages was measured using the LDH Cytotoxicity Assay Kit, Cell Counting Kit-8 (CCK-8) assays and flow cytometry for apoptosis assays. The gene and protein expression of TNF-α, IL-6 and IL-1β were detected using RT-q PCR and ELISA, respectively. The tested coating materials are not cytotoxic to macrophages. The C2S-coated surface stimulated macrophages to express pro-inflammatory mediators, such as TNF-α, IL-6 and IL-1β, and C2S coating caused less IL-6 but greater IL-1β production than the 45S5 coating. C2S coating have no cytotoxicity when directly cultured with macrophages. C2S and 45S5 coatings both have the potential to induce pro-inflammatory effects, and the biocompatibility of C2S is similar to that of 45S5.
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Affiliation(s)
- Liangjiao Chen
- Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou, 510140, People's Republic of China
| | - Yanli Zhang
- Department of Stomatology, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Road, Guangzhou, 510515, People's Republic of China
| | - Jia Liu
- Department of Stomatology, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Road, Guangzhou, 510515, People's Republic of China
| | - Limin Wei
- Department of Stomatology, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Road, Guangzhou, 510515, People's Republic of China
| | - Bin Song
- Department of Stomatology, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Road, Guangzhou, 510515, People's Republic of China
| | - Longquan Shao
- Department of Stomatology, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Road, Guangzhou, 510515, People's Republic of China.
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Liangjiao C, Ping Z, Ruoyu L, Yanli Z, Ting S, Yanjun L, Longquan S. Potential proinflammatory and osteogenic effects of dicalcium silicate particles in vitro. J Mech Behav Biomed Mater 2014; 44:10-22. [PMID: 25594366 DOI: 10.1016/j.jmbbm.2014.12.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Revised: 12/09/2014] [Accepted: 12/10/2014] [Indexed: 12/29/2022]
Abstract
BACKGROUND Due to their biocompatibility and bioactivity, dicalcium silicate (C2S) and hydroxyapatite (HA) are used as coating materials for prosthetic orthopedic and dental implants or as bone substitute materials to fill bone defects. However, prostheses and bone substitutes can release particles that trigger an immune response in the recipient. The immunological effects of C2S particles have not yet been studied. OBJECTIVE The aim of this study was to determine the cytotoxic effects of C2S particles on primary human monocytes, a human monocyte cell line (THP-1) and an osteoblast-like cell line (MG-63). The proinflammatory effects of C2S particles on THP-1 were also detected. Moreover, the osteogenic effects of C2S and HA on MG-63 cells were investigated. METHODS Characterization of C2S and HA was performed using scanning electron microscopy (SEM), energy dispersive analysis (EDS), X-ray diffraction (XRD), Brunner-Emmett-Teller (BET) measurements and laser diffraction. The cytotoxic effect of C2S on primary human monocytes as well as THP-1 and MG-63 cells was measured using Trypan blue assays, Cell Counting Kit-8 (CCK-8) assays and flow cytometry to detect apoptosis. THP-1 human monocytes with or without lipopolysaccharide (LPS) stimulation were exposed to C2S and HA for 6 and 24h. Thereafter, the mRNA expression and protein concentrations of MMP-2, MMP-9, TIMP-2, TIMP-1 and TNF-α were evaluated using real-time PCR and ELISA, respectively. RANKL and OPG mRNA expression levels in MG-63 cells were examined using real-time PCR. RESULTS No significant cytotoxicity was recorded when cells were directly cultured with C2S/HA particles. After THP-1 cells were cultured with C2S/HA for 24h, MMP-2, MMP-9 and TNF-α expression increased, whereas TIMP-2 and TIMP-1 expression decreased. Compared with HA, C2S slightly increased MMP-9 expression and slightly decreased TIMP-1 expression. The MMP: TIMP ratio increased in the C2S and HA groups; however, HA significantly increased the MMP-9: TIMP-1 ratio compared with C2S. Compared with HA, C2S caused less TNF-α production. C2S/HA did not modify the expression of proinflammatory mediators in LPS-stimulated cells. Furthermore, C2S/HA significantly increased OPG expression and slightly increased RANKL expression in MG-63 cells. C2S and HA decreased the RANKL: OPG ratio. CONCLUSION Our in vitro data suggest that C2S is relatively safe when directly cultured with cells. In addition, C2S may exert proinflammatory effects; however, compared with HA, C2S had fewer proinflammatory effects on THP-1. C2S and HA did not alter the LPS-induced production of proinflammatory mediators and had similar osteogenic effects on MG-63 cells.
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Affiliation(s)
- Chen Liangjiao
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Zhu Ping
- School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Liu Ruoyu
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Zhang Yanli
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Sun Ting
- The Medical Centre of Stomatology, the 1st Affiliated Hospital of Jinan University, Guangzhou 510630, China
| | - Liu Yanjun
- School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China.
| | - Shao Longquan
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
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Enzymatically Synthesized Inorganic Polymers as Morphogenetically Active Bone Scaffolds. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2014; 313:27-77. [DOI: 10.1016/b978-0-12-800177-6.00002-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Electrospun nanofibrous scaffolds of poly (L-lactic acid)-dicalcium silicate composite via ultrasonic-aging technique for bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 35:426-33. [PMID: 24411397 DOI: 10.1016/j.msec.2013.11.027] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 10/14/2013] [Accepted: 11/16/2013] [Indexed: 12/30/2022]
Abstract
Polymeric nanofibrous composite scaffolds incorporating bioglass and bioceramics have been increasingly promising for bone tissue engineering. In the present study, electrospun poly (l-lactic acid) (PLLA) scaffolds containing dicalcium silicate (C2S) nanoparticles (approximately 300 nm) were fabricated. Using a novel ultrasonic dispersion and aging method, uniform C2S nanoparticles were prepared and they were homogenously distributed in the PLLA nanofibers upon electrospinning. In vitro, the PLLA-C2S fibers induced the formation of HAp on the surface when immersed in simulated body fluid (SBF). During culture, the osteoblastic MC3T3-E1 cells adhered well on PLLA-C2S scaffolds, as evidenced by the well-defined actin stress fibers and well-spreading morphology. Further, compared to pure PLLA scaffolds without C2S, PLLA-C2S scaffolds markedly promoted the proliferation of MC3T3-E1 cells as well as their osteogenic differentiation, which was characterized by the enhanced alkaline phosphatase (ALP) activity. Together, findings from this study clearly demonstrated that PLLA-C2S composite scaffold may function as an ideal candidate for bone tissue engineering.
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Tanasawet S, Withyachumnarnkul B, Changsangfar C, Cummins SF, Sroyraya M, Sangsuwan P, Kitiyanant Y, Asuvapongpatana S, Weerachatyanukul W. Isolation of Organic Matrix Nacreous Proteins fromHaliotis diversicolorand Their Effect OnIn VitroOsteoinduction. MALACOLOGIA 2013. [DOI: 10.4002/040.056.0208] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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A simple dot-blot-Sirius red-based assay for collagen quantification. Anal Bioanal Chem 2013; 405:6863-71. [PMID: 23780225 DOI: 10.1007/s00216-013-7101-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 05/24/2013] [Accepted: 05/29/2013] [Indexed: 10/26/2022]
Abstract
The assessment of collagen content in tissues is important in biomedical research, since this protein is altered in numerous diseases. Hydroxyproline and Sirius red based assays are the most common methods for collagen quantification. However, these procedures have some pitfalls, such as the requirement of oxygen-free medium or expensive equipment and large sample size or being unsuitable for hydrolyzed collagen, respectively. Our objective was to develop a specific, versatile, and user-friendly quantitative method applicable to small tissue samples and extracts obtained from elastin purification, therefore, suitable for simultaneous quantification of elastin. This method is based on the binding of Sirius red to collagen present in a sample immobilized on a PVDF membrane, as in the dot-blot technique, and quantified by a scanner and image analysis software. Sample loading, Sirius red concentration, temperature and incubation time, type of standard substance, albumin interference, and quantification time are optimized. The method enabled the quantification of (1) intact collagen in several rat tissue homogenates, including small resistance-sized arteries, (2) partially hydrolyzed collagen obtained from NaOH extracts, compatible with elastin purification, and (3) for the detection of differences in collagen content between hypertensive and normotensive rats. We conclude that the developed technique can be widely used since it is versatile (quantifies intact and hydrolyzed collagen), requires small sample volumes, is user-friendly (low-cost, easy to use, minimum toxic materials, and reduced time of test), and is specific (minimal interference with serum albumin).
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Han P, Wu C, Xiao Y. The effect of silicate ions on proliferation, osteogenic differentiation and cell signalling pathways (WNT and SHH) of bone marrow stromal cells. Biomater Sci 2013; 1:379-392. [DOI: 10.1039/c2bm00108j] [Citation(s) in RCA: 182] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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