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Dixon D, Landree EN, Gomillion CT. 3D-Printed Demineralized Bone Matrix-Based Conductive Scaffolds Combined with Electrical Stimulation for Bone Tissue Engineering Applications. ACS APPLIED BIO MATERIALS 2024; 7:4366-4378. [PMID: 38905196 PMCID: PMC11253088 DOI: 10.1021/acsabm.4c00236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 05/31/2024] [Accepted: 06/10/2024] [Indexed: 06/23/2024]
Abstract
Bone is remodeled through a dynamic process facilitated by biophysical cues that support cellular signaling. In healthy bone, signaling pathways are regulated by cells and the extracellular matrix and transmitted via electrical synapses. To this end, combining electrical stimulation (ES) with conductive scaffolding is a promising approach for repairing damaged bone tissue. Therefore, "smart" biomaterials that can provide multifunctionality and facilitate the transfer of electrical cues directly to cells have become increasingly more studied in bone tissue engineering. Herein, 3D-printed electrically conductive composite scaffolds consisting of demineralized bone matrix (DBM) and polycaprolactone (PCL), in combination with ES, for bone regeneration were evaluated for the first time. The conductive composite scaffolds were fabricated and characterized by evaluating mechanical, surface, and electrical properties. The DBM/PCL composites exhibited a higher compressive modulus (107.2 MPa) than that of pristine PCL (62.02 MPa), as well as improved surface properties (i.e., roughness). Scaffold electrical properties were also tuned, with sheet resistance values as low as 4.77 × 105 Ω/sq for our experimental coating of the highest dilution (i.e., 20%). Furthermore, the biocompatibility and osteogenic potential of the conductive composite scaffolds were tested using human mesenchymal stromal cells (hMSCs) both with and without exogenous ES (100 mV/mm for 5 min/day four times/week). In conjunction with ES, the osteogenic differentiation of hMSCs grown on conductive DBM/PCL composite scaffolds was significantly enhanced when compared to those cultured on PCL-only and nonconductive DBM/PCL control scaffolds, as determined through xylenol orange mineral staining and osteogenic protein analysis. Overall, these promising results suggest the potential of this approach for the development of biomimetic hybrid scaffolds for bone tissue engineering applications.
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Affiliation(s)
- Damion
T. Dixon
- School
of Environmental, Civil, Agricultural and Mechanical Engineering,
College of Engineering, University of Georgia, Athens, Georgia 30602, United States
| | - Erika N. Landree
- School
of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia 30602, United States
| | - Cheryl T. Gomillion
- School
of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia 30602, United States
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2
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Lisjak M, Iaconcig A, Guarnaccia C, Vicidomini A, Moretti L, Collaud F, Ronzitti G, Zentilin L, Muro AF. Lethality rescue and long-term amelioration of a citrullinemia type I mouse model by neonatal gene-targeting combined to SaCRISPR-Cas9. Mol Ther Methods Clin Dev 2023; 31:101103. [PMID: 37744006 PMCID: PMC10514469 DOI: 10.1016/j.omtm.2023.08.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 08/25/2023] [Indexed: 09/26/2023]
Abstract
Citrullinemia type I is a rare autosomal-recessive disorder caused by deficiency of argininosuccinate synthetase (ASS1). The clinical presentation includes the acute neonatal form, characterized by ammonia and citrulline accumulation in blood, which may lead to encephalopathy, coma, and death, and the milder late-onset form. Current treatments are unsatisfactory, and the only curative treatment is liver transplantation. We permanently modified the hepatocyte genome in lethal citrullinemia mice (Ass1fold/fold) by inserting the ASS1 cDNA into the albumin locus through the delivery of two AAV8 vectors carrying the donor DNA and the CRISPR-Cas9 platform. The neonatal treatment completely rescued mortality ensuring survival up to 5 months of age, with plasma citrulline levels significantly decreased, while plasma ammonia levels remained unchanged. In contrast, neonatal treatment with a liver-directed non-integrative AAV8-AAT-hASS1 vector failed to improve disease parameters. To model late-onset citrullinemia, we dosed postnatal day (P) 30 juvenile animals using the integrative approach, resulting in lifespan improvement and a minor reduction in disease markers. Conversely, treatment with the non-integrative vector completely rescued mortality, reducing plasma ammonia and citrulline to wild-type values. In summary, the integrative approach in neonates is effective, although further improvements are required to fully correct the phenotype. Non-integrative gene therapy application to juvenile mice ensures a stable and very efficient therapeutic effect.
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Affiliation(s)
- Michela Lisjak
- International Centre for Genetic Engineering and Biotechnology, 34149 Trieste, Italy
| | - Alessandra Iaconcig
- International Centre for Genetic Engineering and Biotechnology, 34149 Trieste, Italy
| | - Corrado Guarnaccia
- International Centre for Genetic Engineering and Biotechnology, 34149 Trieste, Italy
| | - Antonio Vicidomini
- International Centre for Genetic Engineering and Biotechnology, 34149 Trieste, Italy
| | - Laura Moretti
- International Centre for Genetic Engineering and Biotechnology, 34149 Trieste, Italy
| | - Fanny Collaud
- Généthon, 91000 Évry, France
- Université Paris-Saclay, Université d’Évry, Inserm, Généthon, Integrare Research Unit UMR_S951, 91000 Évry, France
| | - Giuseppe Ronzitti
- Généthon, 91000 Évry, France
- Université Paris-Saclay, Université d’Évry, Inserm, Généthon, Integrare Research Unit UMR_S951, 91000 Évry, France
| | - Lorena Zentilin
- International Centre for Genetic Engineering and Biotechnology, 34149 Trieste, Italy
| | - Andrés F. Muro
- International Centre for Genetic Engineering and Biotechnology, 34149 Trieste, Italy
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Bielfeldt M, Budde-Sagert K, Weis N, Buenning M, Staehlke S, Zimmermann J, Arbeiter N, Mobini S, González MU, Rebl H, Uhrmacher A, van Rienen U, Nebe B. Discrimination between the effects of pulsed electrical stimulation and electrochemically conditioned medium on human osteoblasts. J Biol Eng 2023; 17:71. [PMID: 37996914 PMCID: PMC10668359 DOI: 10.1186/s13036-023-00393-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 11/14/2023] [Indexed: 11/25/2023] Open
Abstract
BACKGROUND Electrical stimulation is used for enhanced bone fracture healing. Electrochemical processes occur during the electrical stimulation at the electrodes and influence cellular reactions. Our approach aimed to distinguish between electrochemical and electric field effects on osteoblast-like MG-63 cells. We applied 20 Hz biphasic pulses via platinum electrodes for 2 h. The electrical stimulation of the cell culture medium and subsequent application to cells was compared to directly stimulated cells. The electric field distribution was predicted using a digital twin. RESULTS Cyclic voltammetry and electrochemical impedance spectroscopy revealed partial electrolysis at the electrodes, which was confirmed by increased concentrations of hydrogen peroxide in the medium. While both direct stimulation and AC-conditioned medium decreased cell adhesion and spreading, only the direct stimulation enhanced the intracellular calcium ions and reactive oxygen species. CONCLUSION The electrochemical by-product hydrogen peroxide is not the main contributor to the cellular effects of electrical stimulation. However, undesired effects like decreased adhesion are mediated through electrochemical products in stimulated medium. Detailed characterisation and monitoring of the stimulation set up and electrochemical reactions are necessary to find safe electrical stimulation protocols.
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Affiliation(s)
- Meike Bielfeldt
- Institute for Cell Biology, Rostock University Medical Center, 18057, Rostock, Germany.
| | - Kai Budde-Sagert
- Institute of Communications Engineering, University of Rostock, 18051, Rostock, Germany
- Institute for Visual and Analytic Computing, University of Rostock, 18051, Rostock, Germany
| | - Nikolai Weis
- Institute for Cell Biology, Rostock University Medical Center, 18057, Rostock, Germany
| | - Maren Buenning
- Institute for Cell Biology, Rostock University Medical Center, 18057, Rostock, Germany
| | - Susanne Staehlke
- Institute for Cell Biology, Rostock University Medical Center, 18057, Rostock, Germany
| | - Julius Zimmermann
- Institute of General Electrical Engineering, University of Rostock, 18051, Rostock, Germany
| | - Nils Arbeiter
- Institute of General Electrical Engineering, University of Rostock, 18051, Rostock, Germany
| | - Sahba Mobini
- Instituto de Micro y Nanotecnología, IMN-CNM, CSIC (CEI UAM+CSIC), Isaac Newton 8, E-28760 Tres Cantos, Madrid, Spain
| | - María Ujué González
- Instituto de Micro y Nanotecnología, IMN-CNM, CSIC (CEI UAM+CSIC), Isaac Newton 8, E-28760 Tres Cantos, Madrid, Spain
| | - Henrike Rebl
- Institute for Cell Biology, Rostock University Medical Center, 18057, Rostock, Germany
| | - Adelinde Uhrmacher
- Institute for Visual and Analytic Computing, University of Rostock, 18051, Rostock, Germany
- Interdisciplinary Faculty, University of Rostock, 18051, Rostock, Germany
| | - Ursula van Rienen
- Institute of General Electrical Engineering, University of Rostock, 18051, Rostock, Germany
- Interdisciplinary Faculty, University of Rostock, 18051, Rostock, Germany
| | - Barbara Nebe
- Institute for Cell Biology, Rostock University Medical Center, 18057, Rostock, Germany
- Interdisciplinary Faculty, University of Rostock, 18051, Rostock, Germany
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Lin W, Zhou Z, Chen Z, Xu K, Wu C, Duan X, Dong L, Chen Z, Weng W, Cheng K. Accelerated Bone Regeneration on the Metal Surface through Controllable Surface Potential. ACS APPLIED MATERIALS & INTERFACES 2023; 15:46493-46503. [PMID: 37729066 DOI: 10.1021/acsami.3c08796] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
Surface potential is rarely investigated as an independent factor in influencing tissue regeneration on the metal surface. In this work, the surface potential on the titanium (Ti) surface was designed to be tailored and adjusted independently, which arises from the ferroelectricity and piezoelectricity of poled poly(vinylidene fluoride-trifluoroethylene) (PVTF). Notably, it is found that such controllable surface potential on the metal surface significantly promotes osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) in vitro as well as bone regeneration in vivo. In addition, the intracellular calcium ion (Ca2+) concentration measurement further proves that such controllable surface potential on the metal surface could activate the transmembrane calcium channels and allow the influx of extracellular Ca2+ into the cytoplasm. That might be the reason for improved osteogenic differentiation of BMSCs and bone regeneration. These findings reveal the potential of the metal surface with improved bioactivity for stimulation of osteogenesis and show great prospects for fabricable implantable medical devices with adjustable surface potential.
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Affiliation(s)
- Weiming Lin
- School of Materials Science and Engineering, Center of Rehabilitation Biomedical Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, Peoples R China
| | - Zhiyuan Zhou
- School of Materials Science and Engineering, Center of Rehabilitation Biomedical Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, Peoples R China
| | - Zhuoneng Chen
- Department of Gastroenterology, Zhejiang University School of Medicine, Affiliated Hospital 1, Hangzhou 310003, Peoples R China
| | - Kaicheng Xu
- Department of Orthopedics, Zhejiang University School of Medicine, Affiliated Hospital 2, Hangzhou 310009, Peoples R China
| | - Chengwei Wu
- School of Materials Science and Engineering, Center of Rehabilitation Biomedical Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, Peoples R China
| | - Xiyue Duan
- School of Materials Science and Engineering, Center of Rehabilitation Biomedical Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, Peoples R China
| | - Lingqing Dong
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Province Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, Peoples R China
| | - Zuobing Chen
- Department of Rehabilitation Medicine, Zhejiang University School of Medicine, Affiliated Hospital 1, Hangzhou 310003, Peoples R China
| | - Wenjian Weng
- School of Materials Science and Engineering, Center of Rehabilitation Biomedical Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, Peoples R China
| | - Kui Cheng
- School of Materials Science and Engineering, Center of Rehabilitation Biomedical Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, Peoples R China
- Department of Rehabilitation Medicine, Zhejiang University School of Medicine, Affiliated Hospital 1, Hangzhou 310003, Peoples R China
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Maurmann N, França FS, Girón J, Pranke P. Cell Electrospinning: a Review of Materials and Methodologies for Biofabrication. Adv Biol (Weinh) 2023; 7:e2300058. [PMID: 37271854 DOI: 10.1002/adbi.202300058] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 04/22/2023] [Indexed: 06/06/2023]
Abstract
The process of electrohydrodynamic living cell microencapsulation inside a scaffold during the electrospinning (ES) process is called cell electrospinning (CE). Several studies demonstrate the feasibility of using cell electrospinning for biomedical applications, allowing for the direct biofabrication of living cells to be encapsulated in fibers for the formation of active biological scaffolds. In this review, a comprehensive overview of the materials and methodologies used in cell electrospinning, as well as their biomedical application in tissue engineering, is provided. Cell ES represents an innovative technique for automated application in regenerative medicine.
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Affiliation(s)
- Natasha Maurmann
- Hematology and Stem Cell Laboratory, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Ipiranga 2752/304G, Porto Alegre, 90.610-000, Brazil
| | - Fernanda S França
- Hematology and Stem Cell Laboratory, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Ipiranga 2752/304G, Porto Alegre, 90.610-000, Brazil
| | - Juliana Girón
- Center for Information Technology Renato Archer, Rodovia Dom Pedro I (SP-65), Km 143,6, Amarais, Campinas, SP, 13069-901, Brazil
| | - Patricia Pranke
- Hematology and Stem Cell Laboratory, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Ipiranga 2752/304G, Porto Alegre, 90.610-000, Brazil
- Stem Cell Research Institute, Rua dos Andradas, 1464/133, Porto Alegre, 90.020-010, Brazil
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Hu ZC, Lu JQ, Zhang TW, Liang HF, Yuan H, Su DH, Ding W, Lian RX, Ge YX, Liang B, Dong J, Zhou XG, Jiang LB. Piezoresistive MXene/Silk fibroin nanocomposite hydrogel for accelerating bone regeneration by Re-establishing electrical microenvironment. Bioact Mater 2023; 22:1-17. [PMID: 36203961 PMCID: PMC9513113 DOI: 10.1016/j.bioactmat.2022.08.025] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 08/22/2022] [Accepted: 08/25/2022] [Indexed: 11/18/2022] Open
Abstract
The electrical microenvironment plays an important role in bone repair. However, the underlying mechanism by which electrical stimulation (ES) promotes bone regeneration remains unclear, limiting the design of bone microenvironment–specific electroactive materials. Herein, by simple co-incubation in aqueous suspensions at physiological temperatures, biocompatible regenerated silk fibroin (RSF) is found to assemble into nanofibrils with a β-sheet structure on MXene nanosheets, which has been reported to inhibit the restacking and oxidation of MXene. An electroactive hydrogel based on RSF and bioencapsulated MXene is thus prepared to promote efficient bone regeneration. This MXene/RSF hydrogel also acts as a piezoresistive pressure transducer, which can potentially be utilized to monitor the electrophysiological microenvironment. RNA sequencing is performed to explore the underlying mechanisms, which can activate Ca2+/CALM signaling in favor of the direct osteogenesis process. ES is found to facilitate indirect osteogenesis by promoting the polarization of M2 macrophages, as well as stimulating the neogenesis and migration of endotheliocytes. Consistent improvements in bone regeneration and angiogenesis are observed with MXene/RSF hydrogels under ES in vivo. Collectively, the MXene/RSF hydrogel provides a distinctive and promising strategy for promoting direct osteogenesis, regulating immune microenvironment and neovascularization under ES, leading to re-establish electrical microenvironment for bone regeneration. MXene nanosheets could direct the selective growth of silk nanofibrils. Prepared MXene/RSF hydrogel exhibited good conductivity and sensing ability. The electroactive hydrogel could promote osteogenic differentiation of BMSCs by activating the Ca2+/CALM signaling pathway. The conductive system created an osteoblast–macrophage–endotheliocyte virtuous circle for bone microenvironment.
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7
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Dixon DT, Gomillion CT. 3D-Printed conductive polymeric scaffolds with direct current electrical stimulation for enhanced bone regeneration. J Biomed Mater Res B Appl Biomater 2023; 111:1351-1364. [PMID: 36825765 DOI: 10.1002/jbm.b.35239] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 12/13/2022] [Accepted: 02/10/2023] [Indexed: 02/25/2023]
Abstract
Various methods have been used to treat bone defects caused by genetic disorders, injury, or disease. Yet, there is still great need to develop alternative approaches to repair damaged bone tissue. Bones naturally exhibit piezoelectric potential, or the ability to convert mechanical stresses into electrical impulses. This phenomenon has been utilized clinically to enhance bone regeneration in conjunction with electrical stimulation (ES) therapies; however, oftentimes with critical-sized bone defects, the bioelectric potential at the site of injury is compromised, resulting in less desirable outcomes. In the present study, the potential of a 3D-printed conductive polymer blend to enhance bone formation through restoration of the bioelectrical microenvironment was evaluated. A commercially available 3D printer was used to create circular, thin-film scaffolds consisting of either polylactide (PLA) or a conductive PLA (CPLA) composite. Preosteoblast cells were seeded onto the scaffolds and subjected to direct current ES via a purpose-built cell culture chamber. It was found that CPLA scaffolds had no adverse effects on cell viability, proliferation or differentiation when compared with control scaffolds. The addition of ES, however, resulted in a significant increase in the expression of osteocalcin, a protein indicative of osteoblast maturation, after 14 days of culture. Furthermore, xylenol orange staining also showed the presence of increased mineralized calcium nodules in cultures undergoing stimulation. This study demonstrates the potential for low-cost, conductive scaffolding materials to support cell viability and enhance in vitro mineralization in conjunction with ES.
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Affiliation(s)
- Damion T Dixon
- School of Environmental, Civil, Agricultural and Mechanical Engineering, College of Engineering, University of Georgia, Athens, Georgia, USA
| | - Cheryl T Gomillion
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia, USA
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8
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Reversing the imbalance in bone homeostasis via sustained release of SIRT-1 agonist to promote bone healing under osteoporotic condition. Bioact Mater 2023; 19:429-443. [PMID: 35574058 PMCID: PMC9079176 DOI: 10.1016/j.bioactmat.2022.04.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 04/14/2022] [Accepted: 04/15/2022] [Indexed: 12/12/2022] Open
Abstract
The imbalance of bone homeostasis is the root cause of osteoporosis. However current therapeutic approaches mainly focus on either anabolic or catabolic pathways, which often fail to turn the imbalanced bone metabolism around. Herein we reported that a SIRT-1 agonist mediated molecular therapeutic strategy to reverse the imbalance in bone homeostasis by simultaneously regulating osteogenesis and osteoclastogenesis via locally sustained release of SRT2104 from mineral coated acellular matrix microparticles. Immobilization of SRT2104 on mineral coating (MAM/SRT) harnessing their electrostatic interactions resulted in sustained release of SIRT-1 agonist for over 30 days. MAM/SRT not only enhanced osteogenic differentiation and mineralization, but also attenuated the formation and function of excessive osteoclasts via integrating multiple vital upstream signals (β-catenin, FoxOs, Runx2, NFATc1, etc.) in vitro. Osteoporosis animal model also validated that it accelerated osteoporotic bone healing and improved osseointegration of the surrounding bone. Overall, our work proposes a promising strategy to treat osteoporotic bone defects by reversing the imbalance in bone homeostasis using designated small molecule drug delivery systems. A mineral coated acellular matrix microcarriers sustainably release SIRT2104 more than 30 days. This drug delivery system regulates osteogenesis and osteoclastogenesis. It can accelerate osteoporotic bone healing by reversing the imbalance in bone homeostasis.
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9
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Baek S, Park H, Igci FD, Lee D. Electrical Stimulation of Human Adipose-Derived Mesenchymal Stem Cells on O2 Plasma-Treated ITO Glass Promotes Osteogenic Differentiation. Int J Mol Sci 2022; 23:ijms232012490. [PMID: 36293347 PMCID: PMC9604346 DOI: 10.3390/ijms232012490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/11/2022] [Accepted: 10/12/2022] [Indexed: 11/16/2022] Open
Abstract
Electrical signals represent an essential form of cellular communication. For decades, electrical stimulation has been used effectively in clinical practice to enhance bone healing. However, the detailed mechanisms between electrical stimulation and bone healing are not well understood. In addition, there have been many difficulties in setting up a stable and efficient electrical stimulation system within the in vitro environment. Therefore, various conductive materials and electrical stimulation methods have been tested to establish an effective electrical stimulation system. Through these systems, many studies have been conducted on the effects of electrical stimulation on bone healing and osteogenic differentiation. However, previous studies were limited by the use of opaque conductive materials that obscure the cells; fluorescent observations and staining are known to be two of the critical methods to confirm the states of the cells. Indium tin oxide (ITO) glass is known to have excellent transparency and conductivity, but it is challenging to cultivate cells due to low cell adhesion characteristics. Therefore, we used O2 plasma treatment to increase the hydrophilicity and wettability of ITO glass. This enhanced cell affinity to the glass, providing a stable surface for the cells to attach. Then, electrical stimulation was applied with an amplitude range of 10 to 200 µA at a frequency of 10 Hz. Our results demonstrated that the osteogenic differentiation efficiency was maximized under the amplitude conditions of 10 µA and 50 µA. Accordingly, the results of our study suggest the development of an excellent platform in the field of biological research as a good tool to elucidate various mechanisms of cell bioactivity under electrical conditions.
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Affiliation(s)
- Seungho Baek
- PCL Inc., 128, Beobwon-ro, Songpa-gu, Seoul 08510, Korea
| | - Heekyung Park
- Department of Biomedical Engineering, School of Integrative Engineering, Chung-Ang University, 221 Heukseok-Dong, Dongjak-gu, Seoul 06974, Korea
| | - Fatma Dilara Igci
- Department of Biomedical Engineering, School of Integrative Engineering, Chung-Ang University, 221 Heukseok-Dong, Dongjak-gu, Seoul 06974, Korea
| | - Donghyun Lee
- PCL Inc., 128, Beobwon-ro, Songpa-gu, Seoul 08510, Korea
- Correspondence:
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Wang P, Zhou X, Lv C, Wang Y, Wang Z, Wang L, Zhu Y, Guo M, Zhang P. Modulating the surface potential of microspheres by phase transition in strontium doped barium titanate to restore the electric microenvironment for bone regeneration. Front Bioeng Biotechnol 2022; 10:988300. [PMID: 36110316 PMCID: PMC9468715 DOI: 10.3389/fbioe.2022.988300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 08/08/2022] [Indexed: 11/13/2022] Open
Abstract
The endogenous electrical potential generated by native bone and periosteum plays a key role in maintaining bone mass and quality. Inspired by the electrical properties of bone, different negative surface potentials are built on microspheres to restore electric microenvironment for powerful bone regeneration, which was prepared by the combination of strontium-doped barium titanate (Sr-BTO) nanoparticles and poly (lactic-co-glycolic acid) (PLGA) with high electrostatic voltage field (HEV). The surface potential was modulated through regulating the phase composition of nanoparticles in microspheres by the doping amount of strontium ion (Sr2+). As a result, the 0.1Sr-BTO/PLGA group shows the lowest surface potential and its relative permittivity is closer to natural bone. As expected, the 0.1Sr-BTO/PLGA microspheres performed cytocompatibility, osteogenic activity in vitro and enhance bone regeneration in vivo. Furthermore, the potential mechanism of Sr-BTO/PLGA microspheres to promote osteogenic differentiation was further explored. The lower surface potential generated on Sr-BTO/PLGA microspheres regulates cell membrane potential and leads to an increase in the intracellular calcium ion (Ca2+) concentration, which could activate the Calcineurin (CaN)/Nuclear factor of activated T-cells (NFAT) signaling pathway to promote osteogenic differentiation. This study established an effective method to modulate the surface potential, which provides a prospective exploration for electrical stimulation therapy. The 0.1Sr-BTO/PLGA microsphere with lower surface potential and bone-matched dielectric constant is expected to have great potential in the field of bone regeneration.
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Affiliation(s)
- Peng Wang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, China
| | - Xiaosong Zhou
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, China
| | - Caili Lv
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, China
| | - Yu Wang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
| | - Zongliang Wang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
| | - Liqiang Wang
- Department of Ophthalmology, Third Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Yongzhan Zhu
- 8th Department of Orthopaedics, Foshan Hospital of Traditional Chinese Medicine, Foshan, China
| | - Min Guo
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
- *Correspondence: Peibiao Zhang, ; Min Guo,
| | - Peibiao Zhang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, China
- *Correspondence: Peibiao Zhang, ; Min Guo,
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11
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Surface engineering of 3D-printed scaffolds with minerals and a pro-angiogenic factor for vascularized bone regeneration. Acta Biomater 2022; 140:730-744. [PMID: 34896633 DOI: 10.1016/j.actbio.2021.12.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 11/19/2021] [Accepted: 12/05/2021] [Indexed: 11/22/2022]
Abstract
Scaffolds functionalized with biomolecules have been developed for bone regeneration but inducing the regeneration of complex structured bone with neovessels remains a challenge. For this study, we developed three-dimensional printed scaffolds with bioactive surfaces coated with minerals and platelet-derived growth factor. The minerals were homogeneously deposited on the surface of the scaffold using 0.01 M NaHCO3 with epigallocatechin gallate in simulated body fluid solution (M2). The M2 scaffold demonstrated enhanced mineral coating amount per scaffold with a greater compressive modulus than the others which used different concentration of NaHCO3. Then, we immobilized PDGF on the mineralized scaffold (M2/P), which enhanced the osteogenic differentiation of human adipose derived stem cells in vitro and promoted the secretion of pro-angiogenic factors. Cells cultured in M2/P showed remarkable ratio of osteocalcin- and osteopontin-positive nuclei, and M2/P-derived medium induced endothelial cells to form tubule structures. Finally, the implanted M2/P scaffolds onto mouse calvarial defects had regenerated bone in 80.8 ± 9.8% of the defect area with the arterioles were formed, after 8 weeks. In summary, our scaffold, which composed of minerals and pro-angiogenic growth factor, could be used therapeutically to improve the regeneration of bone with a highly vascularized structure. STATEMENT OF SIGNIFICANCE: Surface engineered scaffolds have been developed for bone regeneration but inducing the volumetric regeneration of bone with neovessels remains a challenge. In here, we developed 3D printed scaffolds with bioactive surfaces coated with bio-minerals and platelet-derived growth factors. We proved that the 0.01 M NaHCO3 with polyphenol in simulated body fluid solution enhanced the deposition of bio-minerals and even distribution on the surface of scaffold. The in vitro studies demonstrated that the attached cells on the bioactive surface showed the enhanced osteogenic differentiation and secretion of pro-angiogenic factors. Finally, the scaffold with bioactive surface not only improved the regenerated volume of bone tissues but also increased neovessel formation after in vivo implantation onto mouse calvarial defect.
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Khaw JS, Xue R, Cassidy NJ, Cartmell SH. Electrical stimulation of titanium to promote stem cell orientation, elongation and osteogenesis. Acta Biomater 2022; 139:204-217. [PMID: 34390847 DOI: 10.1016/j.actbio.2021.08.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 07/06/2021] [Accepted: 08/06/2021] [Indexed: 11/29/2022]
Abstract
Electrical stimulation of cells allows exogenous electric signals as stimuli to manipulate cell growth, preferential orientation and bone remodelling. In this study, commercially pure titanium discs were utilised in combination with a custom-built bioreactor to investigate the cellular responses of human mesenchymal stem cells via in-vitro functional assays. Finite element analysis revealed the homogeneous delivery of electric field in the bioreactor chamber with no detection of current density fluctuation in the proposed model. The custom-built bioreactor with capacitive stimulation delivery system features long-term stimulation with homogeneous electric field, biocompatible, sterilisable, scalable design and cost-effective in the manufacturing process. Using a continuous stimulation regime of 100 and 200 mV/mm on cp Ti discs, viability tests revealed up to an approximately 5-fold increase of cell proliferation rate as compared to non-stimulated controls. The human mesenchymal stem cells showed more elongated and differentiated morphology under this regime, with evidence of nuclear elongation and cytoskeletal orientation perpendicular to the direction of electric field. The continuous stimulation did not cause pH fluctuations and hydrogen peroxide production caused by Faradic reactions, signifying the suitability for long-term toxic free stimulation as opposed to the commonly used direct stimulation regime. An approximate of 4-fold increase in alkaline phosphatase production and approximately 9-fold increase of calcium deposition were observed on 200 mV/mm exposed samples relative to non-stimulated controls. It is worth noting that early stem cell differentiation and matrix production were observed under the said electric field even without the presence of chemical inductive growth factors. STATEMENT OF SIGNIFICANCE: This manuscript presents a study on combining pure titanium (primarily preferred as medical implant materials) and electrical stimulation in a purpose-built bioreactor with capacitive stimulation delivery system. A continuous capacitive stimulation regime on titanium disc has resulted in enhanced stem cell orientation, nuclei elongation, proliferation and differentiation as compared to non-stimulated controls. We believe that this manuscript creates a paradigm for future studies on the evolution of healthcare treatments in the area of targeted therapy on implantable and wearable medical devices through tailored innovative electrical stimulation approach, thereby influencing therapeutic conductive and electroactive biomaterials research prospects and development.
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Affiliation(s)
- Juan Shong Khaw
- The Henry Royce Institute, Royce Hub Building, The University of Manchester, Manchester M13 9PL, UK
| | - Ruikang Xue
- The Henry Royce Institute, Royce Hub Building, The University of Manchester, Manchester M13 9PL, UK
| | - Nigel J Cassidy
- Civil Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Sarah H Cartmell
- The Henry Royce Institute, Royce Hub Building, The University of Manchester, Manchester M13 9PL, UK.
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Yan L, Kageyama T, Zhang B, Yamashita S, Molino PJ, Wallace GG, Fukuda J. Electrical stimulation to human dermal papilla cells for hair regenerative medicine. J Biosci Bioeng 2022; 133:281-290. [PMID: 35034849 DOI: 10.1016/j.jbiosc.2021.12.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/17/2021] [Accepted: 12/06/2021] [Indexed: 12/16/2022]
Abstract
Hair follicle dermal papilla cells (DPCs) are specialized mesenchymal cells that play pivotal roles in hair formation, growth, and cycles, and they are considered as a cell source in hair regenerative medicine. Rodent dermal papilla cells have been shown to induce de novo hair follicle generation in the skin of recipients following transplantation, suggesting that dermal papilla cells can reprogram epidermal microenvironments. However, human DPCs (hDPCs) lose their ability to generate de novo hair follicles under conventional culture methods. We investigated the effects of electrical stimulation (ES) on hDPCs to restore the depressed trichogenic activity. We demonstrated that ES with a polypyrrole (PPy)-modified electrode upregulated trichogenic gene expression in hDPCs in vitro, and the activated cells when transplanted into mice generated double the number of hairs compared to that without the ES. Using specific inhibitors, we revealed that the mechanisms behind the electrical activation are associated with voltage-gated ion channels. Further, ES can be adapted for hDPCs from a patient with androgenic alopecia. Thus, this approach is potentially beneficial in preparing hDPCs for hair regenerative medicine.
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Affiliation(s)
- Lei Yan
- Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Tatsuto Kageyama
- Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan; Kanagawa Institute of Industrial Science and Technology, 3-25-22 Tonomachi, Kawasaki, Kanagawa 210-0821, Japan
| | - Binbin Zhang
- Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan; Kanagawa Institute of Industrial Science and Technology, 3-25-22 Tonomachi, Kawasaki, Kanagawa 210-0821, Japan
| | - Seiya Yamashita
- Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Paul J Molino
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Gordon G Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Junji Fukuda
- Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan; Kanagawa Institute of Industrial Science and Technology, 3-25-22 Tonomachi, Kawasaki, Kanagawa 210-0821, Japan.
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A Collagen-Conducting Polymer Composite with Enhanced Chondrogenic Potential. Cell Mol Bioeng 2021; 14:501-512. [PMID: 34777607 DOI: 10.1007/s12195-021-00702-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 08/31/2021] [Indexed: 10/20/2022] Open
Abstract
Introduction Conducting polymers (CPs) have demonstrated promise for promoting tissue repair, yet their ability to facilitate cartilage regeneration has yet to be thoroughly investigated. Integrating CPs into common scaffolds for tissue regeneration, such as collagen, would enable mechanistic studies on the potential for CPs to promote cartilage repair. Here, we combine absorbable collagen sponges (ACS) with the CP PEDOT-S and show that the PEDOT-S-collagen composite (PEDOT-ACS) has enhanced chondrogenic potential compared to the collagen sponge alone. Methods PEDOT-S was incorporated through a simple incubation process. Changes to scaffold topography, elastic modulus, swelling ratio, and surface charge were measured to analyze how PEDOT-S affected the material properties of the scaffold. Changes in rat bone marrow mesenchymal stem cell (rBMSC) functionality were assessed with cell viability and glycosaminoglycan production assays. Results Macrostructure and microstructure of the scaffold remained largely unaffected by PEDOT-S modification, as observed through SEM images and quantification of scaffold porosity. Zeta potential, swelling ratio, and dry elastic modulus of the collagen scaffold were significantly changed by the incorporation of PEDOT-S. Seeding cells on PEDOT-ACS improved cell viability and enhanced glycosaminoglycan production. Conclusion We demonstrate a practical approach to generate PEDOT-S composites with comparable physical properties to pristine collagen scaffolds. We show that PEDOT-ACS can influence cell functionality and serve as a promising model system for mechanistic investigations on the roles of bioelectronic signaling in the repair of cartilage and other tissue types.
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Liu Z, Wan X, Wang ZL, Li L. Electroactive Biomaterials and Systems for Cell Fate Determination and Tissue Regeneration: Design and Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2007429. [PMID: 34117803 DOI: 10.1002/adma.202007429] [Citation(s) in RCA: 119] [Impact Index Per Article: 39.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/19/2020] [Indexed: 06/12/2023]
Abstract
During natural tissue regeneration, tissue microenvironment and stem cell niche including cell-cell interaction, soluble factors, and extracellular matrix (ECM) provide a train of biochemical and biophysical cues for modulation of cell behaviors and tissue functions. Design of functional biomaterials to mimic the tissue/cell microenvironment have great potentials for tissue regeneration applications. Recently, electroactive biomaterials have drawn increasing attentions not only as scaffolds for cell adhesion and structural support, but also as modulators to regulate cell/tissue behaviors and function, especially for electrically excitable cells and tissues. More importantly, electrostimulation can further modulate a myriad of biological processes, from cell cycle, migration, proliferation and differentiation to neural conduction, muscle contraction, embryogenesis, and tissue regeneration. In this review, endogenous bioelectricity and piezoelectricity are introduced. Then, design rationale of electroactive biomaterials is discussed for imitating dynamic cell microenvironment, as well as their mediated electrostimulation and the applying pathways. Recent advances in electroactive biomaterials are systematically overviewed for modulation of stem cell fate and tissue regeneration, mainly including nerve regeneration, bone tissue engineering, and cardiac tissue engineering. Finally, the significance for simulating the native tissue microenvironment is emphasized and the open challenges and future perspectives of electroactive biomaterials are concluded.
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Affiliation(s)
- Zhirong Liu
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xingyi Wan
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zhong Lin Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA
| | - Linlin Li
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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Light-induced osteogenic differentiation of BMSCs with graphene/TiO 2 composite coating on Ti implant. Colloids Surf B Biointerfaces 2021; 207:111996. [PMID: 34298411 DOI: 10.1016/j.colsurfb.2021.111996] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/10/2021] [Accepted: 07/18/2021] [Indexed: 11/23/2022]
Abstract
Light-induced surface potential have been demonstrated as an effective bone marrow mesenchymal stem cells (BMSCs) osteogenic differentiation regulator. However, traditional bone repair implants almost were weak or no light-responsive. Fortunately, surface modification was a feasible strategy to realize its light functionalization for bone implants. Herein, a graphene oxide (GO)/titanium dioxide (TiO2) nanodots composite coating on the surface of titanium (Ti) implant was constructed, and GO was reduced to reduced graphene oxide (rGO) with the method of UV-assisted photocatalytic reduction. After rGO deposited on the surface of TiO2, a heterojunction formed at the interface of rGO and TiO2. With visible light illumination, positive charges accumulated on the surface of rGO/TiO2 film, and performed as a positive surface potential change. The light-induced surface potential which was generated under proper light intensity is harmless to the cell adhesion and proliferation behavior, but presented a good BMSCs osteogenic differentiation promoting effect, and the activation of the voltage-gated calcium channels through surface potential and the promotion of the adsorption of osteogenic growth factors could be the reason. This work given a new insight of the modification for Ti implant with a light-induced surface potential, and shows potential application for bone regeneration on the clinical practice through light stimulation.
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Das P, Hore A, Ghosh A, Datta P. Bone tissue engineering construct fabricated using a cell electrospinning technique with polyglutamic acid biopolymer. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02612-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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18
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Wang Q, Wu M, Xu X, Ding C, Luo J, Li J. Direct Current Stimulation for Improved Osteogenesis of MC3T3 Cells Using Mineralized Conductive Polyaniline. ACS Biomater Sci Eng 2021; 7:852-861. [PMID: 33715374 DOI: 10.1021/acsbiomaterials.9b01821] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Hydroxyapatites (HAPs) are usually coated on the surface of an implant to improve the osseointegration with defect bone tissue. Besides, conducting polymers have the advantages of good conductivity, reasonable biocompatibility, and easy of modification, which endow them applicable to electrical stimulation therapy. However, it still remains a great challenge to fabricate hybrid coating combing HAP with conducting polymer on implant surface efficiently. In this work, phytic acid-doped polyaniline (PANI) were successfully synthesized on medical titanium (Ti) sheets. By virtue of the abundant anodic phosphoric groups of phytic acid, HAP nanocrystals were biomineralized on PANI. The PANI-HAP hybrid layer exhibits good cell compatibility with MC3T3 cells. More importantly, HAP nanocrystals and PANI operate synergistically on cell proliferation and osteogenesis through electrical stimulation. Alkaline phosphatase activity and extracellular calcium contents of cells on PANI-HAP display 3-fold and 2.6-fold increases, compared with bare Ti sheets, respectively. The valid integration of mineralization and electrical stimulation in this work renders an efficient strategy for implant coating, which might have potential applications in bone-related defects.
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Affiliation(s)
- Quanxin Wang
- College of Polymer Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China.,College of Chemistry and Environmental Protection Engineering, Southwest University for Nationalities, No. 16 South Section 4, Yihuan Road, Chengdu 610041, China
| | - Mingzhen Wu
- College of Polymer Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Xiaoyang Xu
- College of Polymer Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Chunmei Ding
- College of Polymer Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Jianbin Luo
- College of Chemistry and Environmental Protection Engineering, Southwest University for Nationalities, No. 16 South Section 4, Yihuan Road, Chengdu 610041, China
| | - Jianshu Li
- College of Polymer Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
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Wang P, Hao L, Wang Z, Wang Y, Guo M, Zhang P. Gadolinium-Doped BTO-Functionalized Nanocomposites with Enhanced MRI and X-ray Dual Imaging to Simulate the Electrical Properties of Bone. ACS APPLIED MATERIALS & INTERFACES 2020; 12:49464-49479. [PMID: 33090759 DOI: 10.1021/acsami.0c15837] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Physicochemical properties of biomaterials play a regulatory role in osteoblast proliferation and differentiation. Inspired by the electrical properties of natural bone, the electroactive composites applied to osteogenesis have gradually become the hotspot of research. In this work, an electroactive biocomposite of poly(lactic-co-glycolic acid) mixed with gadolinium-doped barium titanate nanoparticles (Gd-BTO NPs) was investigated to establish the structure-activity relationship between electrical property, especially surface potential, and osteogenic activity. Furthermore, the potential mechanism was also explored. The results showed that the introduction of Gd-BTO NPs was more conducive to improve the elastic modulus and beneficial to utilize MRI and X-ray dual imaging. The electrical characteristics of composites indicate that the introduction of Gd-BTO NPs can effectively improve the electrical properties of materials including dielectricity, piezoelectricity, and surface potential. Moreover, adjusting the amount of gadolinium doping could optimize electrical activity and enhance MRI compatibility. The surface potential of 0.2Gd-BTO/PLGA could reach -58.2 to -60.9 mV at pH values from 7 to 9. Functional studies on cells revealed that the negative surface potential of poled Gd-BTO/PLGA enhanced cell attachment and osteogenic differentiation significantly. Furthermore, the negative surface potential could induce intracellular Ca2+ ion concentration oscillation and improve osteogenic differentiation via the calcineurin/NFAT signal pathway. These findings suggest that electroactive Gd-BTO/PLGA nanocomposites may have huge potential for bone regeneration and be expected to have wide applications in the field of bone tissue engineering.
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Affiliation(s)
- Peng Wang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, P. R. China
| | - Lili Hao
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, P. R. China
| | - Zongliang Wang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China
| | - Yu Wang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China
| | - Min Guo
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China
| | - Peibiao Zhang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, P. R. China
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Maharjan B, Kaliannagounder VK, Jang SR, Awasthi GP, Bhattarai DP, Choukrani G, Park CH, Kim CS. In-situ polymerized polypyrrole nanoparticles immobilized poly(ε-caprolactone) electrospun conductive scaffolds for bone tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 114:111056. [DOI: 10.1016/j.msec.2020.111056] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 04/10/2020] [Accepted: 05/04/2020] [Indexed: 12/28/2022]
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21
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Oliveira KMC, Leppik L, Keswani K, Rajeev S, Bhavsar MB, Henrich D, Barker JH. Electrical Stimulation Decreases Dental Pulp Stem Cell Osteo-/Odontogenic Differentiation. Biores Open Access 2020; 9:162-173. [PMID: 32642331 PMCID: PMC7337168 DOI: 10.1089/biores.2020.0002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2020] [Indexed: 12/11/2022] Open
Abstract
Dental pulp stem cells (DPSCs) have great potential for use in tissue engineering (TE)-based dental treatments. Electrical stimulation (EStim) has been shown to influence cellular functions that could play an important role in the success of TE treatments. Despite many recent studies focused on DPSCs, few have investigated the effect EStim has on these cells. The aim of this research was to investigate the effects of direct current (DC) EStim on osteo-/odontogenic differentiation of DPSCs. To do so cells were isolated from male Sprague Dawley rats (7-8 weeks old), and phenotype characterization and multilineage differentiation analysis were conducted to verify their "stemness." Different voltages of DC EStim were administrated 1 h/day for 7 days, and the effect of EStim on DPSC osteo-/odontogenic differentiation was assessed by measuring calcium and collagen deposition, alkaline phosphatase (ALP) activity, and expression of osteo- and odontogenic marker genes at days 7 and 14 of culture. We found that while 10 and 50 mV/mm of EStim had no effect on cell number or metabolic activity, 100 mV/mm caused a significant reduction in cell number, and 150 mV/mm resulted in cell death. Despite increased gene expression of osteo-/odontogenic gene markers, Osteocalcin, RunX2, BSP, and DMP1, at day 7 in EStim treated cells, 50 mV/mm of EStim decreased collagen deposition and ALP activity at both time points, and calcium deposition was found to be lower at day 14. In conclusion, under the conditions tested, EStim appears to impair DPSC osteo-/odontogenic differentiation. Additional studies are needed to further characterize and understand the mechanisms involved in DPSC response to EStim, with an eye toward its potential use in TE-based dental treatments.
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Affiliation(s)
| | - Liudmila Leppik
- Frankfurt Initiative for Regenerative Medicine, J.W. Goethe-University, Frankfurt/Main, Germany
| | - Khyati Keswani
- Frankfurt Initiative for Regenerative Medicine, J.W. Goethe-University, Frankfurt/Main, Germany
| | - Sreeraj Rajeev
- Frankfurt Initiative for Regenerative Medicine, J.W. Goethe-University, Frankfurt/Main, Germany
| | - Mit B. Bhavsar
- Frankfurt Initiative for Regenerative Medicine, J.W. Goethe-University, Frankfurt/Main, Germany
| | - Dirk Henrich
- Department of Trauma-, Hand- and Reconstructive Surgery, J.W. Goethe-University, Frankfurt/Main, Germany
| | - John H. Barker
- Frankfurt Initiative for Regenerative Medicine, J.W. Goethe-University, Frankfurt/Main, Germany
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Leppik L, Oliveira KMC, Bhavsar MB, Barker JH. Electrical stimulation in bone tissue engineering treatments. Eur J Trauma Emerg Surg 2020; 46:231-244. [PMID: 32078704 PMCID: PMC7113220 DOI: 10.1007/s00068-020-01324-1] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 02/04/2020] [Indexed: 12/20/2022]
Abstract
Electrical stimulation (EStim) has been shown to promote bone healing and regeneration both in animal experiments and clinical treatments. Therefore, incorporating EStim into promising new bone tissue engineering (BTE) therapies is a logical next step. The goal of current BTE research is to develop combinations of cells, scaffolds, and chemical and physical stimuli that optimize treatment outcomes. Recent studies demonstrating EStim's positive osteogenic effects at the cellular and molecular level provide intriguing clues to the underlying mechanisms by which it promotes bone healing. In this review, we discuss results of recent in vitro and in vivo research focused on using EStim to promote bone healing and regeneration and consider possible strategies for its application to improve outcomes in BTE treatments. Technical aspects of exposing cells and tissues to EStim in in vitro and in vivo model systems are also discussed.
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Affiliation(s)
- Liudmila Leppik
- Frankfurt Initiative for Regenerative Medicine, Experimental Orthopedics and Trauma Surgery, J.W. Goethe University, Frankfurt/Main, Germany.
| | - Karla Mychellyne Costa Oliveira
- Frankfurt Initiative for Regenerative Medicine, Experimental Orthopedics and Trauma Surgery, J.W. Goethe University, Frankfurt/Main, Germany
| | - Mit Balvantray Bhavsar
- Frankfurt Initiative for Regenerative Medicine, Experimental Orthopedics and Trauma Surgery, J.W. Goethe University, Frankfurt/Main, Germany
| | - John Howard Barker
- Frankfurt Initiative for Regenerative Medicine, Experimental Orthopedics and Trauma Surgery, J.W. Goethe University, Frankfurt/Main, Germany
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Angulo-Pineda C, Srirussamee K, Palma P, Fuenzalida VM, Cartmell SH, Palza H. Electroactive 3D Printed Scaffolds Based on Percolated Composites of Polycaprolactone With Thermally Reduced Graphene Oxide for Antibacterial and Tissue Engineering Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E428. [PMID: 32121237 PMCID: PMC7152842 DOI: 10.3390/nano10030428] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 02/14/2020] [Accepted: 02/20/2020] [Indexed: 02/07/2023]
Abstract
Applying electrical stimulation (ES) could affect different cellular mechanisms, thereby producing a bactericidal effect and an increase in human cell viability. Despite its relevance, this bioelectric effect has been barely reported in percolated conductive biopolymers. In this context, electroactive polycaprolactone (PCL) scaffolds with conductive Thermally Reduced Graphene Oxide (TrGO) nanoparticles were obtained by a 3D printing method. Under direct current (DC) along the percolated scaffolds, a strong antibacterial effect was observed, which completely eradicated S. aureus on the surface of scaffolds. Notably, the same ES regime also produced a four-fold increase in the viability of human mesenchymal stem cells attached to the 3D conductive PCL/TrGO scaffold compared with the pure PCL scaffold. These results have widened the design of novel electroactive composite polymers that could both eliminate the bacteria adhered to the scaffold and increase human cell viability, which have great potential in tissue engineering applications.
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Affiliation(s)
- Carolina Angulo-Pineda
- Department of Chemical Engineering and Biotechnology and Materials, University of Chile, Santiago 8370456, Chile
- Millenium Nuclei in Soft Smart Mechanical Metamaterials, Universidad de Chile, Santiago 8370456, Chile
| | - Kasama Srirussamee
- Department of Biomedical Engineering, Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang (KMITL), Bangkok 10520, Thailand;
| | - Patricia Palma
- Department of Pathology and Oral Medicine, University of Chile, Santiago 8380492, Chile;
| | | | - Sarah H. Cartmell
- Department of Materials, The University of Manchester, Manchester M13 9PL, UK;
| | - Humberto Palza
- Department of Chemical Engineering and Biotechnology and Materials, University of Chile, Santiago 8370456, Chile
- Millenium Nuclei in Soft Smart Mechanical Metamaterials, Universidad de Chile, Santiago 8370456, Chile
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Prasopthum A, Deng Z, Khan IM, Yin Z, Guo B, Yang J. Three dimensional printed degradable and conductive polymer scaffolds promote chondrogenic differentiation of chondroprogenitor cells. Biomater Sci 2020; 8:4287-4298. [DOI: 10.1039/d0bm00621a] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We report a conductive and biodegradable 3D printed polymer scaffold that promotes chondrogenic differentiation of chondroprogenitor cells. The conductive material consists of tetraniline-b-polycaprolactone-b-tetraaniline and polycaprolactone.
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Affiliation(s)
- Aruna Prasopthum
- School of Pharmacy
- University of Nottingham
- Nottingham
- UK
- School of Pharmacy
| | - Zexing Deng
- Frontier Institute of Science and Technology
- and Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research
- College of Stomatology
- Xi'an Jiaotong University
- China
| | - Ilyas M. Khan
- Centre of Nanohealth
- Swansea University Medical School
- Swansea
- UK
| | - Zhanhai Yin
- Department of Orthopaedics
- The First Affiliated Hospital of Xi'an Jiaotong University
- Xi'an
- China
| | - Baolin Guo
- Frontier Institute of Science and Technology
- and Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research
- College of Stomatology
- Xi'an Jiaotong University
- China
| | - Jing Yang
- School of Pharmacy
- University of Nottingham
- Nottingham
- UK
- Biodiscovery Institute
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25
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Electric Phenomenon: A Disregarded Tool in Tissue Engineering and Regenerative Medicine. Trends Biotechnol 2020; 38:24-49. [DOI: 10.1016/j.tibtech.2019.07.002] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 07/01/2019] [Accepted: 07/02/2019] [Indexed: 02/08/2023]
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Long X, Wang X, Yao L, Lin S, Zhang J, Weng W, Cheng K, Wang H, Lin J. Graphene/Si-Promoted Osteogenic Differentiation of BMSCs through Light Illumination. ACS APPLIED MATERIALS & INTERFACES 2019; 11:43857-43864. [PMID: 31692325 DOI: 10.1021/acsami.9b14679] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Graphene (Gr) presents promising applications in regulating the osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs). Light illumination is regarded as a spatiotemporally controllable, easily applicable, and noninvasive mean to modulate material responses. Herein, Gr-transferred silicon (Gr/Si) with a Schottky junction is utilized to evaluate the visible-light-promoted osteogenic differentiation of BMSCs. Under light illumination, light-induced charges, owing to the formation of the Schottky junction at the interface of Gr and Si, accumulated on the surface and then changed the surface potential of Gr/Si. The Schottky junction and surface potential at the interface of Gr and Si was measured by photovoltaic test and scanning Kelvin probe microscopy. Alkaline phosphatase (ALP) activity and quantitative real-time polymerase chain reaction (PCR) measurement showed that such variations of surface improved the osteogenic differentiation of BMSCs, and the activation of the voltage-gated calcium channels through surface potential and accumulation of cytosolic Ca2+ could be the reason. Moreover, X-ray photoelectron spectroscopy characterization showed that surface charge could also affect BMSCs differentiation through the promotion or inhibition of the adsorption of osteogenic growth factors. Such light-promoted osteogenic differentiation of BMSCs on Gr/Si may have huge potential for biomedical materials or devices for bone regeneration application.
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Affiliation(s)
- Xiaojun Long
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications , Zhejiang University , Hangzhou 310027 , China
| | - Xiaozhao Wang
- Zhejiang University-University of Edinburgh Institute & School of Basic Medicine , Zhejiang University School of Medicine , Hangzhou 314400 , China
| | - Lili Yao
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications , Zhejiang University , Hangzhou 310027 , China
| | - Suya Lin
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications , Zhejiang University , Hangzhou 310027 , China
| | - Jiamin Zhang
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications , Zhejiang University , Hangzhou 310027 , China
| | - Wenjian Weng
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications , Zhejiang University , Hangzhou 310027 , China
| | - Kui Cheng
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications , Zhejiang University , Hangzhou 310027 , China
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Electroactive composite scaffold with locally expressed osteoinductive factor for synergistic bone repair upon electrical stimulation. Biomaterials 2019; 230:119617. [PMID: 31771859 DOI: 10.1016/j.biomaterials.2019.119617] [Citation(s) in RCA: 110] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Revised: 10/30/2019] [Accepted: 11/10/2019] [Indexed: 02/05/2023]
Abstract
Tissue engineering is a promising strategy for the repair of large-scale bone defects, in which scaffolds and growth factors are two critical issues influencing the efficacy of bone regeneration. Unfortunately, the broad application of growth factors is limited by their poor stability in the scaffolds. In the present study, the strictly controlled expression of human bone morphogenetic protein-4 (hBMP-4) in the presence of doxycycline is achieved by adding an hBMP-4 gene fragment into a non-viral artificial restructuring plasmid vector (pSTAR) to form the pSTAR-hBMP-4 plasmid (phBMP-4). Furthermore, the controlled release of phBMP-4 is obtained with an electroactive tissue engineering scaffold, generated by combining a triblock copolymer of poly(l-lactic acid)-block-aniline pentamer-block-poly(l-lactic acid) (PLA-AP) with poly(lactic-co-glycolic acid)/hydroxyapatite (PLGA/HA). This PLGA/HA/PLA-AP/phBMP-4 composite scaffold, with controlled gene release and Dox-regulated gene expression upon electrical stimulation, operating synergistically, exhibits an improved cell proliferation ability, enhanced osteogenesis differentiation in vitro, and effective bone healing in vivo in a rabbit radial defect model. Taking these results together, the proposed smart PLGA/HA/PLA-AP/phBMP-4 scaffold lays a solid theoretical and experimental basis for future applications of such multi-functional materials in bone tissue engineering to help patients in need.
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Li J, Liu X, Crook JM, Wallace GG. Electrical stimulation-induced osteogenesis of human adipose derived stem cells using a conductive graphene-cellulose scaffold. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 107:110312. [PMID: 31761174 DOI: 10.1016/j.msec.2019.110312] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 08/20/2019] [Accepted: 10/12/2019] [Indexed: 12/29/2022]
Abstract
The versatile properties of graphene-based materials are enabling various tissue regeneration, towards meeting an ever increasing demand for replacement tissues due to injury through trauma and disease. In particular, an innate ability for graphene to promote osteogenic differentiation of stem cells, combined with the potential to enhance the biological activity of cells through electrical stimulation (ES) using graphene, supports its use for osteoinduction or reconstruction. In this paper, we describe a miniaturized graphene-cellulose (G-C) scaffold-based device that incorporates electroactive G-C 'paper' within a polystyrene chamber for concomitant cell culture and ES. The G-C electrodes possessed lower impedance and higher charge injection capacity than gold (Au) electrodes, with high stability. By coupling ES with previously reported properties of the G-C scaffolds, we have advanced the platform for improved adipose derived stem cell (ADSC) support and osteogenic differentiation. We anticipate using the G-C scaffold-based ES device for in vitro modelling of osteogenic induction, bone tissue engineering and in vivo bone regeneration towards new therapeutic strategies for bone injury and disease. Furthermore, the device could reasonably be used for ES and culture of other cell types and engineering other tissues.
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Affiliation(s)
- Jianfeng Li
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, University of Wollongong, NSW, 2500, Australia
| | - Xiao Liu
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, University of Wollongong, NSW, 2500, Australia.
| | - Jeremy M Crook
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, University of Wollongong, NSW, 2500, Australia; Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, New South Wales, 2522, Australia; Department of Surgery, St Vincent's Hospital, The University of Melbourne, Fitzroy, Victoria, 3065, Australia.
| | - Gordon G Wallace
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, University of Wollongong, NSW, 2500, Australia.
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Zhou T, Yan L, Xie C, Li P, Jiang L, Fang J, Zhao C, Ren F, Wang K, Wang Y, Zhang H, Guo T, Lu X. A Mussel-Inspired Persistent ROS-Scavenging, Electroactive, and Osteoinductive Scaffold Based on Electrochemical-Driven In Situ Nanoassembly. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1805440. [PMID: 31106983 DOI: 10.1002/smll.201805440] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 04/24/2019] [Indexed: 06/09/2023]
Abstract
Conductive polymers are promising for bone regeneration because they can regulate cell behavior through electrical stimulation; moreover, they are antioxidative agents that can be used to protect cells and tissues from damage originating from reactive oxygen species (ROS). However, conductive polymers lack affinity to cells and osteoinductivity, which limits their application in tissue engineering. Herein, an electroactive, cell affinitive, persistent ROS-scavenging, and osteoinductive porous Ti scaffold is prepared by the on-surface in situ assembly of a polypyrrole-polydopamine-hydroxyapatite (PPy-PDA-HA) film through a layer-by-layer pulse electrodeposition (LBL-PED) method. During LBL-PED, the PPy-PDA nanoparticles (NPs) and HA NPs are in situ synthesized and uniformly coated on a porous scaffold from inside to outside. PDA is entangled with and doped into PPy to enhance the ROS scavenging rate of the scaffold and realize repeatable, efficient ROS scavenging over a long period of time. HA and electrical stimulation synergistically promote osteogenic cell differentiation on PPy-PDA-HA films. Ultimately, the PPy-PDA-HA porous scaffold provides excellent bone regeneration through the synergistic effects of electroactivity, cell affinity, and antioxidative activity of the PPy-PDA NPs and the osteoinductivity of HA NPs. This study provides a new strategy for functionalizing porous scaffolds that show great promise as implants for tissue regeneration.
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Affiliation(s)
- Ting Zhou
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Liwei Yan
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Chaoming Xie
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Pengfei Li
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Lili Jiang
- Key Laboratory of Fluid and Power Machinery of Ministry of Education, Center for Advanced Materials and Energy, School of Materials Science and Engineering, Xihua University, Chengdu, 610039, China
| | - Ju Fang
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
| | - Cancan Zhao
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
| | - Fuzeng Ren
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
| | - Kefeng Wang
- National Engineering Research Center for Biomaterials, Genome Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Yingbo Wang
- College of Chemical Engineering, Xinjiang Normal University, 102 Xinyi Road, Urumqi, Xinjiang, 830054, China
| | - Hongping Zhang
- Engineering Research Center of Biomass Materials, Ministry of Education, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, China
| | - Tailin Guo
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Xiong Lu
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
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30
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Sato M, Asano T, Hosomichi J, Ono T, Nakata T. Optogenetic manipulation of intracellular calcium by BACCS promotes differentiation of MC3T3-E1 cells. Biochem Biophys Res Commun 2018; 506:716-722. [PMID: 30376992 DOI: 10.1016/j.bbrc.2018.10.107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 10/17/2018] [Indexed: 10/28/2022]
Abstract
Bone remodeling is maintained through the balance between bone formation by osteoblasts and bone resorption by osteoclasts. Previous studies suggested that intracellular Ca2+ signaling plays an important role in the differentiation of osteoblasts; however, the molecular mechanism of Ca2+ signaling in the differentiation of osteoblasts remains unclear. To elucidate the effect of Ca2+ signaling in osteoblasts, we employed an optogenetic tool, blue light-activated Ca2+ channel switch (BACCS). BACCS was used to spatiotemporally control intracellular Ca2+ with blue light stimulation. MC3T3-E1 cells, which have been used as a model of differentiation from preosteoblast to osteoblast, were promoted to differentiate by BACCS expression and rhythmical blue light stimulation. The results indicated that intracellular Ca2+ change from the outside of the cells can regulate signaling for differentiation of MC3T3-E1 cells. Our findings provide evidence that Ca2+ could cause osteoblast differentiation.
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Affiliation(s)
- Moe Sato
- Department of Orthodontic Science, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan; Department of Cell Biology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan; The Center for Brain Integration Research (CBIR), Tokyo Medical and Dental University, Tokyo, 113-8510, Japan
| | - Toshifumi Asano
- Department of Cell Biology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan; The Center for Brain Integration Research (CBIR), Tokyo Medical and Dental University, Tokyo, 113-8510, Japan
| | - Jun Hosomichi
- Department of Orthodontic Science, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan
| | - Takashi Ono
- Department of Orthodontic Science, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan
| | - Takao Nakata
- Department of Cell Biology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan; The Center for Brain Integration Research (CBIR), Tokyo Medical and Dental University, Tokyo, 113-8510, Japan.
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31
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Hu W, Chen T, Tsao C, Cheng Y. The effects of substrate‐mediated electrical stimulation on the promotion of osteogenic differentiation and its optimization. J Biomed Mater Res B Appl Biomater 2018; 107:1607-1619. [DOI: 10.1002/jbm.b.34253] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 08/29/2018] [Accepted: 09/08/2018] [Indexed: 01/09/2023]
Affiliation(s)
- Wei‐Wen Hu
- Department of Chemical and Materials EngineeringNational Central University Zhongli District, Taoyuan City Taiwan
- Center for Biocellular EngineeringNational Central University Zhongli District, Taoyuan City Taiwan
| | - Tun‐Chi Chen
- Department of Chemical and Materials EngineeringNational Central University Zhongli District, Taoyuan City Taiwan
| | - Chia‐Wen Tsao
- Center for Biocellular EngineeringNational Central University Zhongli District, Taoyuan City Taiwan
- Department of Mechanical EngineeringNational Central University Zhongli District, Taoyuan City Taiwan
| | - Yu‐Che Cheng
- Center for Biocellular EngineeringNational Central University Zhongli District, Taoyuan City Taiwan
- School of MedicineFu Jen Catholic University New Taipei City Taiwan
- Proteomics Laboratory, Department of Medical ResearchCathay General Hospital Taipei Taiwan
- Department of Biomedical Sciences and EngineeringNational Central University Zhongli Taiwan
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32
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Li P, Zhang S, Li K, Wang J, Liu M, Gu X, Fan Y. The promoting effect on pre-osteoblast growth under electrical and magnetic double stimulation based on PEDOT/Fe 3O 4/PLGA magnetic-conductive bi-functional scaffolds. J Mater Chem B 2018; 6:4952-4962. [PMID: 32255068 DOI: 10.1039/c8tb00985f] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electrical stimulation (ES) and magnetic stimulation (MS) can promote bone tissue formation in vivo. Loading ES and MS simultaneously would be very beneficial for bone tissue construction in vitro or in vivo. Magnetic-conductive bi-functional scaffolds which are favorable for the transfer of ES and MS, could further facilitate bone cell/tissue growth. Poly(3,4-ethylenedioxythiophene) (PEDOT)/Fe3O4/polylactic acid-co-glycolic acid (PLGA) magnetic-conductive bi-functional fibrous scaffolds were prepared through in situ polymerization of EDOT on Fe3O4/PLGA fibers. MC3T3-E1 pre-osteoblasts were incubated on the PEDOT/Fe3O4/PLGA fibrous scaffolds and were stimulated by electrical, magnetic and electrical-magnetic signals respectively to detect the impact of different stimulation on cell viability. The measured results show that the scaffolds possess good conductivity and superparamagnetic responsiveness. Furthermore, both electrical and magnetic stimulation promoted cell proliferation and magnetic stimulation could induce cell alignment arrangement. Meanwhile, under electrical-magnetic double stimulation, cell viability was much higher than for cells under single electrical or magnetic stimulation. The growth promoting effects of PEDOT/Fe3O4/PLGA fibrous scaffolds under electrical-magnetic double stimulation has great practical potential for bone tissue engineering.
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Affiliation(s)
- Ping Li
- School of Biological Science and Medical Engineering, Beihang University, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing 100083, China.
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Eischen-Loges M, Oliveira KMC, Bhavsar MB, Barker JH, Leppik L. Pretreating mesenchymal stem cells with electrical stimulation causes sustained long-lasting pro-osteogenic effects. PeerJ 2018; 6:e4959. [PMID: 29910982 PMCID: PMC6001709 DOI: 10.7717/peerj.4959] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Accepted: 05/22/2018] [Indexed: 02/06/2023] Open
Abstract
Background Electrical stimulation (ES) has a long history of successful use in the clinical treatment of refractory, non-healing bone fractures and has recently been proposed as an adjunct to bone tissue-engineering treatments to optimize their therapeutic potential. This idea emerged from ES’s demonstrated positive effects on stem cell migration, proliferation, differentiation and adherence to scaffolds, all cell behaviors recognized to be advantageous in Bone Tissue Engineering (BTE). In previous in vitro experiments we demonstrated that direct current ES, administered daily, accelerates Mesenchymal Stem Cell (MSC) osteogenic differentiation. In the present study, we sought to define the optimal ES regimen for maximizing this pro-osteogenic effect. Methods Rat bone marrow-derived MSC were exposed to 100 mV/mm, 1 hr/day for three, seven, and 14 days, then osteogenic differentiation was assessed at Day 14 of culture by measuring collagen production, calcium deposition, alkaline phosphatase activity and osteogenic marker gene expression. Results We found that exposing MSC to ES for three days had minimal effect, while seven and 14 days resulted in increased osteogenic differentiation, as indicated by significant increases in collagen and calcium deposits, and expression of osteogenic marker genes Col1a1, Osteopontin, Osterix and Calmodulin. We also found that cells treated with ES for seven days, maintained this pro-osteogenic activity long (for at least seven days) after discontinuing ES exposure. Discussion This study showed that while three days of ES is insufficient to solicit pro-osteogenic effects, seven and 14 days significantly increases osteogenic differentiation. Importantly, we found that cells treated with ES for only seven days, maintained this pro-osteogenic activity long after discontinuing ES exposure. This sustained positive osteogenic effect is likely due to the enhanced expression of RunX2 and Calmodulin we observed. This prolonged positive osteogenic effect, long after discontinuing ES treatment, if incorporated into BTE treatment protocols, could potentially improve outcomes and in doing so help BTE achieve its full therapeutic potential.
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Affiliation(s)
- Maria Eischen-Loges
- Frankfurt Initiative for Regenerative Medicine, Johann Wolfgang Goethe Universität Frankfurt am Main, Frankfurt am Main, Hessen, Germany
| | - Karla M C Oliveira
- Frankfurt Initiative for Regenerative Medicine, Johann Wolfgang Goethe Universität Frankfurt am Main, Frankfurt am Main, Hessen, Germany
| | - Mit B Bhavsar
- Frankfurt Initiative for Regenerative Medicine, Johann Wolfgang Goethe Universität Frankfurt am Main, Frankfurt am Main, Hessen, Germany
| | - John H Barker
- Frankfurt Initiative for Regenerative Medicine, Johann Wolfgang Goethe Universität Frankfurt am Main, Frankfurt am Main, Hessen, Germany
| | - Liudmila Leppik
- Frankfurt Initiative for Regenerative Medicine, Johann Wolfgang Goethe Universität Frankfurt am Main, Frankfurt am Main, Hessen, Germany
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Liu Z, Dong L, Cheng K, Luo Z, Weng W. Charge injection based electrical stimulation on polypyrrole planar electrodes to regulate cellular osteogenic differentiation. RSC Adv 2018; 8:18470-18479. [PMID: 35541122 PMCID: PMC9080618 DOI: 10.1039/c8ra02601g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 05/13/2018] [Indexed: 01/08/2023] Open
Abstract
This study reveals that the Qinj on electrodes is a more significant factor than applied voltage for electrical stimulation to regulate cellular osteogenic differentiation, and the charge injection capacity can be tuned by thickness of Ppy.
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Affiliation(s)
- Zongguang Liu
- School of Materials Science and Engineering
- State Key Laboratory of Silicon Materials
- Zhejiang University
- Hangzhou 310027
- China
| | - Lingqing Dong
- School of Materials Science and Engineering
- State Key Laboratory of Silicon Materials
- Zhejiang University
- Hangzhou 310027
- China
| | - Kui Cheng
- School of Materials Science and Engineering
- State Key Laboratory of Silicon Materials
- Zhejiang University
- Hangzhou 310027
- China
| | - Zhongkuan Luo
- Zhejiang-California International NanoSystems Institute
- Hangzhou 310058
- China
| | - Wenjian Weng
- School of Materials Science and Engineering
- State Key Laboratory of Silicon Materials
- Zhejiang University
- Hangzhou 310027
- China
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