301
|
Electrically stimulated osteogenesis on Ti-PPy/PLGA constructs prepared by laser-assisted processes. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 55:61-9. [DOI: 10.1016/j.msec.2015.05.059] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 03/24/2015] [Accepted: 05/18/2015] [Indexed: 01/14/2023]
|
302
|
Saigal R, Cimetta E, Tandon N, Zhou J, Langer R, Young M, Vunjak-Novakovic G, Redenti S. Electrical stimulation via a biocompatible conductive polymer directs retinal progenitor cell differentiation. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2015; 2013:1627-31. [PMID: 24110015 DOI: 10.1109/embc.2013.6609828] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The goal of this study was to simulate in vitro the spontaneous electrical wave activity associated with retinal development and investigate if such biometrically designed signals can enhance differentiation of mouse retinal progenitor cells (mRPC). To this end, we cultured cells on an electroconductive transplantable polymer, polypyrrole (PPy) and measured gene expression and morphology of the cells. Custom-made 8-well cell culture chambers were designed to accommodate PPy deposited onto indium tin oxide-coated (ITO) glass slides, with precise control of the PPy film thickness. mRPCs were isolated from post-natal day 1 (P1) green fluorescent protein positive (GFP+) mice, expanded, seeded onto PPY films, allowed to adhere for 24 hours, and then subjected to electrical stimulation (100 µA pulse trains, 5 s in duration, once per minute) for 4 days. Cultured cells and non-stimulated controls were processed for immunostaining and confocal analysis, and for RNA extraction and quantitative PCR. Stimulated cells expressed significantly higher levels of the early photoreceptor marker cone-rod homebox (CRX, the earliest known marker of photoreceptor identity), and protein kinase-C (PKC), and significantly lower levels of the glial fibrillary acidic protein (GFAP). Consistently, stimulated cells developed pronounced neuronal morphologies with significantly longer dendritic processes and larger cell bodies than non-stimulated controls. Taken together, the experimental evidence shows that the application of an electrical stimulation designed based on retinal development can be implemented to direct and enhance retinal differentiation of mRPCs, suggesting a role for biomimetic electrical stimulation in directing progenitor cells toward neural fates.
Collapse
|
303
|
Ribeiro J, Pereira T, Caseiro AR, Armada-da-Silva P, Pires I, Prada J, Amorim I, Amado S, França M, Gonçalves C, Lopes MA, Santos JD, Silva DM, Geuna S, Luís AL, Maurício AC. Evaluation of biodegradable electric conductive tube-guides and mesenchymal stem cells. World J Stem Cells 2015; 7:956-975. [PMID: 26240682 PMCID: PMC4515438 DOI: 10.4252/wjsc.v7.i6.956] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 03/19/2015] [Accepted: 05/06/2015] [Indexed: 02/06/2023] Open
Abstract
AIM: To study the therapeutic effect of three tube-guides with electrical conductivity associated to mesenchymal stem cells (MSCs) on neuro-muscular regeneration after neurotmesis.
METHODS: Rats with 10-mm gap nerve injury were tested using polyvinyl alcohol (PVA), PVA-carbon nanotubes (CNTs) and MSCs, and PVA-polypyrrole (PPy). The regenerated nerves and tibialis anterior muscles were processed for stereological studies after 20 wk. The functional recovery was assessed serially for gait biomechanical analysis, by extensor postural thrust, sciatic functional index and static sciatic functional index (SSI), and by withdrawal reflex latency (WRL). In vitro studies included cytocompatibility, flow cytometry, reverse transcriptase polymerase chain reaction and karyotype analysis of the MSCs. Histopathology of lung, liver, kidneys, and regional lymph nodes ensured the biomaterials biocompatibility.
RESULTS: SSI remained negative throughout and independently from treatment. Differences between treted groups in the severity of changes in WRL existed, showing a faster regeneration for PVA-CNTs-MSCs (P < 0.05). At toe-off, less acute ankle joint angles were seen for PVA-CNTs-MSCs group (P = 0.051) suggesting improved ankle muscles function during the push off phase of the gait cycle. In PVA-PPy and PVA-CNTs groups, there was a 25% and 42% increase of average fiber area and a 13% and 21% increase of the “minimal Feret’s diameter” respectively. Stereological analysis disclosed a significantly (P < 0.05) increased myelin thickness (M), ratio myelin thickness/axon diameter (M/d) and ratio axon diameter/fiber diameter (d/D; g-ratio) in PVA-CNT-MSCs group (P < 0.05).
CONCLUSION: Results revealed that treatment with MSCs and PVA-CNTs tube-guides induced better nerve fiber regeneration. Functional and kinematics analysis revealed positive synergistic effects brought by MSCs and PVA-CNTs. The PVA-CNTs and PVA-PPy are promising scaffolds with electric conductive properties, bio- and cytocompatible that might prevent the secondary neurogenic muscular atrophy by improving the reestablishment of the neuro-muscular junction.
Collapse
|
304
|
Hardy JG, Villancio-Wolter MK, Sukhavasi RC, Mouser DJ, Aguilar D, Geissler SA, Kaplan DL, Schmidt CE. Electrical Stimulation of Human Mesenchymal Stem Cells on Conductive Nanofibers Enhances their Differentiation toward Osteogenic Outcomes. Macromol Rapid Commun 2015; 36:1884-1890. [PMID: 26147073 DOI: 10.1002/marc.201500233] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 05/07/2015] [Indexed: 12/19/2022]
Abstract
Tissue scaffolds allowing the behavior of the cells that reside within them to be controlled are of particular interest for tissue engineering. Herein, the preparation of conductive fiber-based bone tissue scaffolds (nonwoven mats of electrospun polycaprolactone with an interpenetrating network of polypyrrole and polystyrenesulfonate) is described that enable the electrical stimulation of human mesenchymal stem cells to enhance their differentiation toward osteogenic outcomes.
Collapse
Affiliation(s)
- John G Hardy
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, 32611, USA.,Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA.,Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA
| | - Maria K Villancio-Wolter
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, 32611, USA
| | - Rushi C Sukhavasi
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - David J Mouser
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - David Aguilar
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Sydney A Geissler
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, 32611, USA.,Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA
| | - Christine E Schmidt
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, 32611, USA.,Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| |
Collapse
|
305
|
Alvarez-Mejia L, Morales J, Cruz GJ, Olayo MG, Olayo R, Díaz-Ruíz A, Ríos C, Mondragón-Lozano R, Sánchez-Torres S, Morales-Guadarrama A, Fabela-Sánchez O, Salgado-Ceballos H. Functional recovery in spinal cord injured rats using polypyrrole/iodine implants and treadmill training. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:209. [PMID: 26169188 DOI: 10.1007/s10856-015-5541-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 07/03/2015] [Indexed: 06/04/2023]
Abstract
Currently, there is no universally accepted treatment for traumatic spinal cord injury (TSCI), a pathology that can cause paraplegia or quadriplegia. Due to the complexity of TSCI, more than one therapeutic strategy may be necessary to regain lost functions. Therefore, the present study proposes the use of implants of mesoparticles (MPs) of polypyrrole/iodine (PPy/I) synthesized by plasma for neuroprotection promotion and functional recovery in combination with treadmill training (TT) for neuroplasticity promotion and maintenance of muscle tone. PPy/I films were synthesized by plasma and pulverized to obtain MPs. Rats with a TSCI produced by the NYU impactor were divided into four groups: Vehicle (saline solution); MPs (PPy/I implant); Vehicle-TT (saline solution + TT); and MPs-TT (PPy/I implant + TT). The vehicle or MPs (30 μL) were injected into the lesion site 48 h after a TSCI. Four days later, TT was carried out 5 days a week for 2 months. Functional recovery was evaluated weekly using the BBB motor scale for 9 weeks and tissue protection using histological and morphometric analysis thereafter. Although the MPs of PPy/I increased nerve tissue preservation (P = 0.03) and promoted functional recovery (P = 0.015), combination with TT did not produce better neuroprotection, but significantly improved functional results (P = 0.000) when comparing with the vehicle group. So, use these therapeutic strategies by separately could stimulate specific mechanisms of neuroprotection and neuroregeneration, but when using together they could mainly potentiate different mechanisms of neuronal plasticity in the preserved spinal cord tissue after a TSCI and produce a significant functional recovery. The implant of mesoparticles of polypyrrole/iodine into the injured spinal cord displayed good integration into the nervous tissue without a response of rejection, as well as an increased in the amount of preserved tissue and a better functional recovery than the group without transplant after a traumatic spinal cord injury by contusion in rats. The relevance of the present results is that polypyrrole/iodine implants were synthesized by plasma instead by conventional chemical or electrochemical methods. Synthesis by plasma modifies physicochemical properties of polypyrrole/iodine implants, which can be responsible of the histological response and functional results. Furthermore, no additional molecules or trophic factors or cells were added to the implant for obtain such results. Even more, when the implant was used together with physical rehabilitation, better functional recovery was obtained than that observed when these strategies were used by separately.
Collapse
Affiliation(s)
- Laura Alvarez-Mejia
- Department of Electric Engineering, Universidad Autónoma Metropolitana Iztapalapa, Apdo. Postal 55-534, CP 09340, Mexico, DF, Mexico
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
306
|
Yu X, Tang X, Gohil SV, Laurencin CT. Biomaterials for Bone Regenerative Engineering. Adv Healthc Mater 2015; 4:1268-85. [PMID: 25846250 PMCID: PMC4507442 DOI: 10.1002/adhm.201400760] [Citation(s) in RCA: 208] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Revised: 02/21/2015] [Indexed: 01/08/2023]
Abstract
Strategies for bone tissue regeneration have been continuously evolving for the last 25 years since the introduction of the "tissue engineering" concept. The convergence of the life, physical, and engineering sciences has brought in several advanced technologies available to tissue engineers and scientists. This resulted in the creation of a new multidisciplinary field termed as "regenerative engineering". In this article, the role of biomaterials in bone regenerative engineering is systematically reviewed to elucidate the new design criteria for the next generation of biomaterials for bone regenerative engineering. The exemplary design of biomaterials harnessing various materials characteristics towards successful bone defect repair and regeneration is highlighted. Particular attention is given to the attempts of incorporating advanced materials science, stem cell technologies, and developmental biology into biomaterials design to engineer and develop the next generation bone grafts.
Collapse
Affiliation(s)
- Xiaohua Yu
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- The Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, CT 06030, USA
| | - Xiaoyan Tang
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06268
| | - Shalini V. Gohil
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, CT 06030, USA
| | - Cato T. Laurencin
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- The Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06268, USA
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06268
| |
Collapse
|
307
|
Hardy JG, Geissler SA, Aguilar D, Villancio-Wolter MK, Mouser DJ, Sukhavasi RC, Cornelison RC, Tien LW, Preda RC, Hayden RS, Chow JK, Nguy L, Kaplan DL, Schmidt CE. Instructive Conductive 3D Silk Foam-Based Bone Tissue Scaffolds Enable Electrical Stimulation of Stem Cells for Enhanced Osteogenic Differentiation. Macromol Biosci 2015; 15:1490-6. [PMID: 26033953 DOI: 10.1002/mabi.201500171] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 05/06/2015] [Indexed: 11/11/2022]
Abstract
Stimuli-responsive materials enabling the behavior of the cells that reside within them to be controlled are vital for the development of instructive tissue scaffolds for tissue engineering. Herein, we describe the preparation of conductive silk foam-based bone tissue scaffolds that enable the electrical stimulation of human mesenchymal stem cells (HMSCs) to enhance their differentiation toward osteogenic outcomes.
Collapse
Affiliation(s)
- John G Hardy
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, 32611, USA. .,Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA. .,Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155, USA.
| | - Sydney A Geissler
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, 32611, USA.,Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - David Aguilar
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Maria K Villancio-Wolter
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, 32611, USA
| | - David J Mouser
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Rushi C Sukhavasi
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - R Chase Cornelison
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, 32611, USA.,Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Lee W Tien
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155, USA
| | - R Carmen Preda
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155, USA
| | - Rebecca S Hayden
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155, USA
| | - Jacqueline K Chow
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Lindsey Nguy
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155, USA.
| | - Christine E Schmidt
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, 32611, USA. .,Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA.
| |
Collapse
|
308
|
Lee JH, Jeon WY, Kim HH, Lee EJ, Kim HW. Electrical stimulation by enzymatic biofuel cell to promote proliferation, migration and differentiation of muscle precursor cells. Biomaterials 2015; 53:358-69. [DOI: 10.1016/j.biomaterials.2015.02.062] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 02/11/2015] [Accepted: 02/13/2015] [Indexed: 12/27/2022]
|
309
|
Thompson DM, Koppes AN, Hardy JG, Schmidt CE. Electrical stimuli in the central nervous system microenvironment. Annu Rev Biomed Eng 2015; 16:397-430. [PMID: 25014787 DOI: 10.1146/annurev-bioeng-121813-120655] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Electrical stimulation to manipulate the central nervous system (CNS) has been applied as early as the 1750s to produce visual sensations of light. Deep brain stimulation (DBS), cochlear implants, visual prosthetics, and functional electrical stimulation (FES) are being applied in the clinic to treat a wide array of neurological diseases, disorders, and injuries. This review describes the history of electrical stimulation of the CNS microenvironment; recent advances in electrical stimulation of the CNS, including DBS to treat essential tremor, Parkinson's disease, and depression; FES for the treatment of spinal cord injuries; and alternative electrical devices to restore vision and hearing via neuroprosthetics (retinal and cochlear implants). It also discusses the role of electrical cues during development and following injury and, importantly, manipulation of these endogenous cues to support regeneration of neural tissue.
Collapse
Affiliation(s)
- Deanna M Thompson
- Department of Biomedical Engineering and Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York 12180;
| | | | | | | |
Collapse
|
310
|
Fabrication and characterization of conductive chitosan/gelatin-based scaffolds for nerve tissue engineering. Int J Biol Macromol 2015; 74:360-6. [PMID: 25553968 DOI: 10.1016/j.ijbiomac.2014.12.014] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 11/28/2014] [Accepted: 12/03/2014] [Indexed: 01/02/2023]
|
311
|
Wang Y, Rouabhia M, Lavertu D, Zhang Z. Pulsed electrical stimulation modulates fibroblasts' behaviour through the Smad signalling pathway. J Tissue Eng Regen Med 2015; 11:1110-1121. [PMID: 25712595 DOI: 10.1002/term.2014] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 12/11/2014] [Accepted: 01/15/2015] [Indexed: 01/14/2023]
Abstract
The aim of this study was to investigate the healing characteristics and the underlying signalling pathway of human dermal fibroblasts under the influence of pulsed electrical stimulation (PES). Primary human dermal fibroblasts were seeded on polypyrrole-coated polyester fabrics and subjected to four different PES protocols. The parameters of the rectangular pulse included potential intensity (50 and 100 mV/mm) and stimulation time (pulse width 300 s within a period of 600 s, and pulse width 10 s within a period of 1200 s). Our study revealed that PES moderately improved the ability of the cells to migrate in association with a statistically significant (p < 0.05) increase of FGF2 secretion by the PES-exposed fibroblasts. These exposed fibroblasts were able to contract collagen gel matrix up to 48 h and this collagen gel contraction paralleled an increase in α-SMA mRNA expression and protein production from the PES-exposed fibroblasts. Interestingly, the effect of PES on the human fibroblasts involved the Smad signalling pathway, as we observed higher levels of phosphorylated Smad2 and Smad3 in the stimulated groups compared to the control groups. Overall, this study demonstrated that PES modulates fibroblast activities through the Smad signalling pathway, thus providing new mechanistic insights related to the use of PES to promote wound healing in humans. Copyright © 2015 John Wiley & Sons, Ltd.
Collapse
Affiliation(s)
- Yongliang Wang
- Groupe de Recherche en Écologie Buccale, Faculté de Médecine Dentaire, Université Laval, Québec, QC, Canada.,Axe Médecine régénératrice, Centre de Recherche du CHU de Québec, Département de Chirurgie, Faculté de Médecine, Université Laval, QC, Canada
| | - Mahmoud Rouabhia
- Groupe de Recherche en Écologie Buccale, Faculté de Médecine Dentaire, Université Laval, Québec, QC, Canada
| | - Denis Lavertu
- Département de Chirurgie Plastique, Hôpital Saint-François d'Assise, Québec, Canada
| | - Ze Zhang
- Axe Médecine régénératrice, Centre de Recherche du CHU de Québec, Département de Chirurgie, Faculté de Médecine, Université Laval, QC, Canada
| |
Collapse
|
312
|
|
313
|
Efficacy of supermacroporous poly(ethylene glycol)–gelatin cryogel matrix for soft tissue engineering applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 47:298-312. [DOI: 10.1016/j.msec.2014.11.031] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 10/11/2014] [Accepted: 11/08/2014] [Indexed: 02/07/2023]
|
314
|
Ribeiro C, Correia DM, Ribeiro S, Sencadas V, Botelho G, Lanceros‐Méndez S. Piezoelectric poly(vinylidene fluoride) microstructure and poling state in active tissue engineering. Eng Life Sci 2015. [DOI: 10.1002/elsc.201400144] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Clarisse Ribeiro
- Centro/Departamento de FísicaUniversidade do Minho Campus de Gualtar Braga Portugal
- INL—International Iberian Nanotechnology Laboratory Braga Portugal
| | - Daniela M. Correia
- Centro/Departamento de FísicaUniversidade do Minho Campus de Gualtar Braga Portugal
- Centro/Departamento de QuímicaUniversidade do Minho Campus de Gualtar Braga Portugal
| | - Sylvie Ribeiro
- Centro/Departamento de FísicaUniversidade do Minho Campus de Gualtar Braga Portugal
| | - Vítor Sencadas
- Centro/Departamento de FísicaUniversidade do Minho Campus de Gualtar Braga Portugal
- Escola Superior de TecnologiaInstituto, Politécnico do Cávado e do Ave Campus do IPCA Barcelos Portugal
| | - Gabriela Botelho
- Centro/Departamento de QuímicaUniversidade do Minho Campus de Gualtar Braga Portugal
| | - Senentxu Lanceros‐Méndez
- Centro/Departamento de FísicaUniversidade do Minho Campus de Gualtar Braga Portugal
- INL—International Iberian Nanotechnology Laboratory Braga Portugal
| |
Collapse
|
315
|
Shah K, Vasileva D, Karadaghy A, Zustiak SP. Development and characterization of polyethylene glycol–carbon nanotube hydrogel composite. J Mater Chem B 2015; 3:7950-7962. [DOI: 10.1039/c5tb01047k] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polyethylene–glycol–carbon nanotube composite was developed where carbon nanotubes altered the hydrogel mechanical and physical properties and aided neuronal cell viability.
Collapse
Affiliation(s)
- K. Shah
- Department of Biomedical Engineering
- Saint Louis University
- St Louis
- USA
| | - D. Vasileva
- Department of Biomedical Engineering
- Saint Louis University
- St Louis
- USA
| | - A. Karadaghy
- Department of Biomedical Engineering
- Saint Louis University
- St Louis
- USA
| | - S. P. Zustiak
- Department of Biomedical Engineering
- Saint Louis University
- St Louis
- USA
| |
Collapse
|
316
|
Neuro-muscular Regeneration Using Scaffolds with Mesenchymal Stem Cells (MSCs) Isolated from Human Umbilical Cord Wharton's Jelly: Functional and Morphological Analysis Using Rat Sciatic Nerve Neurotmesis Injury Model. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.proeng.2015.07.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
317
|
Kaur G, Adhikari R, Cass P, Bown M, Gunatillake P. Electrically conductive polymers and composites for biomedical applications. RSC Adv 2015. [DOI: 10.1039/c5ra01851j] [Citation(s) in RCA: 510] [Impact Index Per Article: 56.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
This paper provides a review of the recent advances made in the field of electroactive polymers and composites for biomedical applications.
Collapse
Affiliation(s)
- Gagan Kaur
- CSIRO Manufacturing Flagship
- Clayton
- Australia
| | | | - Peter Cass
- CSIRO Manufacturing Flagship
- Clayton
- Australia
| | - Mark Bown
- CSIRO Manufacturing Flagship
- Clayton
- Australia
| | | |
Collapse
|
318
|
Hardy JG, Hernandez DS, Cummings DM, Edwards FA, Shear JB, Schmidt CE. Multiphoton microfabrication of conducting polymer-based biomaterials. J Mater Chem B 2015; 3:5001-5004. [DOI: 10.1039/c5tb00104h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multiphoton microfabrication was used to prepare CP-based materials for drug delivery and stimulating tissues.
Collapse
Affiliation(s)
- John. G. Hardy
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin
- USA
- J. Crayton Pruitt Family Department of Biomedical Engineering
| | | | - Damian M. Cummings
- Department of Neuroscience, Physiology and Pharmacology
- University College London
- London
- UK
| | - Frances A. Edwards
- Department of Neuroscience, Physiology and Pharmacology
- University College London
- London
- UK
| | - Jason B. Shear
- Department of Chemistry
- The University of Texas at Austin
- Austin
- USA
| | - Christine E. Schmidt
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin
- USA
- J. Crayton Pruitt Family Department of Biomedical Engineering
| |
Collapse
|
319
|
Borah R, Kumar A, Das MK, Ramteke A. Surface functionalization-induced enhancement in surface properties and biocompatibility of polyaniline nanofibers. RSC Adv 2015. [DOI: 10.1039/c5ra01809a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Surface functionalization by glutaraldehyde effectively enhanced hydrophilicity of polyaniline nanofibers (PNFs) rendering them with improved biocompatibility as revealed by MTT assay and membrane stability test.
Collapse
Affiliation(s)
- Rajiv Borah
- Materials Research Laboratory
- Department of Physics
- Tezpur University
- Tezpur-784028
- India
| | - Ashok Kumar
- Materials Research Laboratory
- Department of Physics
- Tezpur University
- Tezpur-784028
- India
| | - Monoj Kumar Das
- Cancer Genetics and Chemoprevention Research Group
- Department of Molecular Biology and Biotechnology
- Tezpur University
- Tezpur-784028
- India
| | - Anand Ramteke
- Cancer Genetics and Chemoprevention Research Group
- Department of Molecular Biology and Biotechnology
- Tezpur University
- Tezpur-784028
- India
| |
Collapse
|
320
|
Khan F, Tanaka M, Ahmad SR. Fabrication of polymeric biomaterials: a strategy for tissue engineering and medical devices. J Mater Chem B 2015; 3:8224-8249. [DOI: 10.1039/c5tb01370d] [Citation(s) in RCA: 153] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Fabrication of biomaterials scaffolds using various methods and techniques is discussed, utilising biocompatible, biodegradable and stimuli-responsive polymers and their composites. This review covers the lithography and printing techniques, self-organisation and self-assembly methods for 3D structural scaffolds generation, and smart hydrogels, for tissue regeneration and medical devices.
Collapse
Affiliation(s)
- Ferdous Khan
- Senior Polymer Chemist
- ECOSE-Biopolymer
- Knauf Insulation Limited
- St. Helens
- UK
| | - Masaru Tanaka
- Biomaterials Science Group
- Department of Biochemical Engineering
- Graduate School of Science and Engineering
- Yamagata University
- Yonezawa
| | - Sheikh Rafi Ahmad
- Centre for Applied Laser Spectroscopy
- CDS
- DEAS
- Cranfield University
- Swindon
| |
Collapse
|
321
|
Anderson M, Shelke NB, Manoukian OS, Yu X, McCullough LD, Kumbar SG. Peripheral Nerve Regeneration Strategies: Electrically Stimulating Polymer Based Nerve Growth Conduits. Crit Rev Biomed Eng 2015; 43:131-59. [PMID: 27278739 PMCID: PMC5266796 DOI: 10.1615/critrevbiomedeng.2015014015] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Treatment of large peripheral nerve damages ranges from the use of an autologous nerve graft to a synthetic nerve growth conduit. Biological grafts, in spite of many merits, show several limitations in terms of availability and donor site morbidity, and outcomes are suboptimal due to fascicle mismatch, scarring, and fibrosis. Tissue engineered nerve graft substitutes utilize polymeric conduits in conjunction with cues both chemical and physical, cells alone and or in combination. The chemical and physical cues delivered through polymeric conduits play an important role and drive tissue regeneration. Electrical stimulation (ES) has been applied toward the repair and regeneration of various tissues such as muscle, tendon, nerve, and articular tissue both in laboratory and clinical settings. The underlying mechanisms that regulate cellular activities such as cell adhesion, proliferation, cell migration, protein production, and tissue regeneration following ES is not fully understood. Polymeric constructs that can carry the electrical stimulation along the length of the scaffold have been developed and characterized for possible nerve regeneration applications. We discuss the use of electrically conductive polymers and associated cell interaction, biocompatibility, tissue regeneration, and recent basic research for nerve regeneration. In conclusion, a multifunctional combinatorial device comprised of biomaterial, structural, functional, cellular, and molecular aspects may be the best way forward for effective peripheral nerve regeneration.
Collapse
Affiliation(s)
- Matthew Anderson
- Department of Orthopaedic Surgery, UConn Health, Farmington, CT
- Institute for Regenerative Engineering, UConn Health, Farmington, CT
- Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, UConn Health, Farmington, CT
| | - Namdev B. Shelke
- Department of Orthopaedic Surgery, UConn Health, Farmington, CT
- Institute for Regenerative Engineering, UConn Health, Farmington, CT
- Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, UConn Health, Farmington, CT
| | - Ohan S. Manoukian
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT
| | - Xiaojun Yu
- Department of Chemistry, Chemical Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, NJ
| | | | - Sangamesh G. Kumbar
- Department of Orthopaedic Surgery, UConn Health, Farmington, CT
- Institute for Regenerative Engineering, UConn Health, Farmington, CT
- Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, UConn Health, Farmington, CT
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT
| |
Collapse
|
322
|
Jin G, Li K. The electrically conductive scaffold as the skeleton of stem cell niche in regenerative medicine. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 45:671-81. [DOI: 10.1016/j.msec.2014.06.004] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 04/18/2014] [Accepted: 06/09/2014] [Indexed: 12/13/2022]
|
323
|
Shadi L, Karimi M, Entezami AA. Preparation of electroactive nanofibers of star-shaped polycaprolactone/polyaniline blends. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3430-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
324
|
Synthesis, characterization and antioxidant activity of a novel electroactive and biodegradable polyurethane for cardiac tissue engineering application. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 44:24-37. [DOI: 10.1016/j.msec.2014.07.061] [Citation(s) in RCA: 106] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2014] [Revised: 07/08/2014] [Accepted: 07/25/2014] [Indexed: 02/01/2023]
|
325
|
Landers J, Turner JT, Heden G, Carlson AL, Bennett NK, Moghe PV, Neimark AV. Carbon nanotube composites as multifunctional substrates for in situ actuation of differentiation of human neural stem cells. Adv Healthc Mater 2014; 3:1745-52. [PMID: 24753391 DOI: 10.1002/adhm.201400042] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Revised: 03/17/2014] [Indexed: 12/23/2022]
Affiliation(s)
- John Landers
- Department of Chemical and Biochemical Engineering; Rutgers University; 98 Brett Rd Piscataway NJ 08854 USA
| | - Jeffrey T. Turner
- Department of Chemical and Biochemical Engineering; Rutgers University; 98 Brett Rd Piscataway NJ 08854 USA
- Department of Biomedical Engineering; Rutgers University; 599 Taylor Road Piscataway NJ 08854 USA
| | - Greg Heden
- Department of Chemical and Biochemical Engineering; Rutgers University; 98 Brett Rd Piscataway NJ 08854 USA
| | - Aaron L. Carlson
- Department of Chemical and Biochemical Engineering; Rutgers University; 98 Brett Rd Piscataway NJ 08854 USA
- Department of Biomedical Engineering; Rutgers University; 599 Taylor Road Piscataway NJ 08854 USA
| | - Neal K. Bennett
- Department of Chemical and Biochemical Engineering; Rutgers University; 98 Brett Rd Piscataway NJ 08854 USA
- Department of Biomedical Engineering; Rutgers University; 599 Taylor Road Piscataway NJ 08854 USA
| | - Prabhas V. Moghe
- Department of Chemical and Biochemical Engineering; Rutgers University; 98 Brett Rd Piscataway NJ 08854 USA
- Department of Biomedical Engineering; Rutgers University; 599 Taylor Road Piscataway NJ 08854 USA
| | - Alexander V. Neimark
- Department of Chemical and Biochemical Engineering; Rutgers University; 98 Brett Rd Piscataway NJ 08854 USA
| |
Collapse
|
326
|
Gattazzo F, De Maria C, Whulanza Y, Taverni G, Ahluwalia A, Vozzi G. Realisation and characterization of conductive hollow fibers for neuronal tissue engineering. J Biomed Mater Res B Appl Biomater 2014; 103:1107-19. [DOI: 10.1002/jbm.b.33297] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 08/16/2014] [Accepted: 09/12/2014] [Indexed: 12/13/2022]
Affiliation(s)
- Francesca Gattazzo
- Research Center “E. Piaggio,” University of Pisa; Largo Lucio Lazzarino 1 Pisa 56122 Italy
- Department of Molecular Medicine; University of Padova; Padova 35131 Italy
| | - Carmelo De Maria
- Research Center “E. Piaggio,” University of Pisa; Largo Lucio Lazzarino 1 Pisa 56122 Italy
- Department of Ingegneria dell'Informazione; University of Pisa; Via G. Caruso 16 Pisa 56122 Italy
| | - Yudan Whulanza
- Research Center “E. Piaggio,” University of Pisa; Largo Lucio Lazzarino 1 Pisa 56122 Italy
| | - Gemma Taverni
- Research Center “E. Piaggio,” University of Pisa; Largo Lucio Lazzarino 1 Pisa 56122 Italy
| | - Arti Ahluwalia
- Research Center “E. Piaggio,” University of Pisa; Largo Lucio Lazzarino 1 Pisa 56122 Italy
- Department of Ingegneria dell'Informazione; University of Pisa; Via G. Caruso 16 Pisa 56122 Italy
| | - Giovanni Vozzi
- Research Center “E. Piaggio,” University of Pisa; Largo Lucio Lazzarino 1 Pisa 56122 Italy
- Department of Ingegneria dell'Informazione; University of Pisa; Via G. Caruso 16 Pisa 56122 Italy
| |
Collapse
|
327
|
Zhang L, Li Y, Li L, Guo B, Ma PX. Non-cytotoxic conductive carboxymethyl-chitosan/aniline pentamer hydrogels. REACT FUNCT POLYM 2014. [DOI: 10.1016/j.reactfunctpolym.2014.06.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
328
|
Large enhancement in neurite outgrowth on a cell membrane-mimicking conducting polymer. Nat Commun 2014; 5:4523. [DOI: 10.1038/ncomms5523] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 06/25/2014] [Indexed: 01/24/2023] Open
|
329
|
Carriers in cell-based therapies for neurological disorders. Int J Mol Sci 2014; 15:10669-723. [PMID: 24933636 PMCID: PMC4100175 DOI: 10.3390/ijms150610669] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 05/19/2014] [Accepted: 05/30/2014] [Indexed: 02/07/2023] Open
Abstract
There is a pressing need for long-term neuroprotective and neuroregenerative therapies to promote full function recovery of injuries in the human nervous system resulting from trauma, stroke or degenerative diseases. Although cell-based therapies are promising in supporting repair and regeneration, direct introduction to the injury site is plagued by problems such as low transplanted cell survival rate, limited graft integration, immunorejection, and tumor formation. Neural tissue engineering offers an integrative and multifaceted approach to tackle these complex neurological disorders. Synergistic therapeutic effects can be obtained from combining customized biomaterial scaffolds with cell-based therapies. Current scaffold-facilitated cell transplantation strategies aim to achieve structural and functional rescue via offering a three-dimensional permissive and instructive environment for sustainable neuroactive factor production for prolonged periods and/or cell replacement at the target site. In this review, we intend to highlight important considerations in biomaterial selection and to review major biodegradable or non-biodegradable scaffolds used for cell transplantation to the central and peripheral nervous system in preclinical and clinical trials. Expanded knowledge in biomaterial properties and their prolonged interaction with transplanted and host cells have greatly expanded the possibilities for designing suitable carrier systems and the potential of cell therapies in the nervous system.
Collapse
|
330
|
Balint R, Cassidy NJ, Cartmell SH. Conductive polymers: towards a smart biomaterial for tissue engineering. Acta Biomater 2014; 10:2341-53. [PMID: 24556448 DOI: 10.1016/j.actbio.2014.02.015] [Citation(s) in RCA: 871] [Impact Index Per Article: 87.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Revised: 02/07/2014] [Accepted: 02/10/2014] [Indexed: 01/03/2023]
Abstract
Developing stimulus-responsive biomaterials with easy-to-tailor properties is a highly desired goal of the tissue engineering community. A novel type of electroactive biomaterial, the conductive polymer, promises to become one such material. Conductive polymers are already used in fuel cells, computer displays and microsurgical tools, and are now finding applications in the field of biomaterials. These versatile polymers can be synthesised alone, as hydrogels, combined into composites or electrospun into microfibres. They can be created to be biocompatible and biodegradable. Their physical properties can easily be optimized for a specific application through binding biologically important molecules into the polymer using one of the many available methods for their functionalization. Their conductive nature allows cells or tissue cultured upon them to be stimulated, the polymers' own physical properties to be influenced post-synthesis and the drugs bound in them released, through the application of an electrical signal. It is thus little wonder that these polymers are becoming very important materials for biosensors, neural implants, drug delivery devices and tissue engineering scaffolds. Focusing mainly on polypyrrole, polyaniline and poly(3,4-ethylenedioxythiophene), we review conductive polymers from the perspective of tissue engineering. The basic properties of conductive polymers, their chemical and electrochemical synthesis, the phenomena underlying their conductivity and the ways to tailor their properties (functionalization, composites, etc.) are discussed.
Collapse
|
331
|
Gu X, Ding F, Williams DF. Neural tissue engineering options for peripheral nerve regeneration. Biomaterials 2014; 35:6143-56. [PMID: 24818883 DOI: 10.1016/j.biomaterials.2014.04.064] [Citation(s) in RCA: 406] [Impact Index Per Article: 40.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Accepted: 04/16/2014] [Indexed: 12/19/2022]
Abstract
Tissue engineered nerve grafts (TENGs) have emerged as a potential alternative to autologous nerve grafts, the gold standard for peripheral nerve repair. Typically, TENGs are composed of a biomaterial-based template that incorporates biochemical cues. A number of TENGs have been used experimentally to bridge long peripheral nerve gaps in various animal models, where the desired outcome is nerve tissue regeneration and functional recovery. So far, the translation of TENGs to the clinic for use in humans has met with a certain degree of success. In order to optimize the TENG design and further approach the matching of TENGs with autologous nerve grafts, many new cues, beyond the traditional ones, will have to be integrated into TENGs. Furthermore, there is a strong requirement for monitoring the real-time dynamic information related to the construction of TENGs. The aim of this opinion paper is to specifically and critically describe the latest advances in the field of neural tissue engineering for peripheral nerve regeneration. Here we delineate new attempts in the design of template (or scaffold) materials, especially in the context of biocompatibility, the choice and handling of support cells, and growth factor release systems. We further discuss the significance of RNAi for peripheral nerve regeneration, anticipate the potential application of RNAi reagents for TENGs, and speculate on the possible contributions of additional elements, including angiogenesis, electrical stimulation, molecular inflammatory mediators, bioactive peptides, antioxidant reagents, and cultured biological constructs, to TENGs. Finally, we consider that a diverse array of physicochemical and biological cues must be orchestrated within a TENG to create a self-consistent coordinated system with a close proximity to the regenerative microenvironment of the peripheral nervous system.
Collapse
Affiliation(s)
- Xiaosong Gu
- Jiangsu Key Laboratory of Neuroregeneration, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, JS 226001, China.
| | - Fei Ding
- Jiangsu Key Laboratory of Neuroregeneration, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, JS 226001, China
| | - David F Williams
- Wake Forest Institute of Regenerative Medicine, Winston-Salem, NC, USA.
| |
Collapse
|
332
|
Conjugated polyelectrolyte materials for promoting progenitor cell growth without serum. Sci Rep 2014; 3:1702. [PMID: 23609105 PMCID: PMC3633151 DOI: 10.1038/srep01702] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Accepted: 04/08/2013] [Indexed: 11/10/2022] Open
Abstract
The discovery of new active biomaterials for promoting progenitor cell growth and differentiation in serum-free medium is still proving more challenging for the clinical treatments of degenerative diseases. In this work, a conjugated polyelectrolyte, polythiophene derivative (PMNT), was discovered to significantly drive the cell cycle progression from G1 to S and G2 phases and thus efficiently promote the cell growth without the need of serum. Furthermore, the fluorescent characteristic of PMNT makes it simultaneously able to trace its cellular uptake and localization by cell imaging. cDNA microarray study shows that PMNT can greatly regulate genes related to cell growth or differentiation. To the best of our knowledge, this is the first example of cell growth or differentiation promotion by polyelectrolyte material without the need of serum, thereby providing an important demonstration of degenerative biomaterial discovery through polymer design.
Collapse
|
333
|
|
334
|
Sirivisoot S, Pareta R, Harrison BS. Protocol and cell responses in three-dimensional conductive collagen gel scaffolds with conductive polymer nanofibres for tissue regeneration. Interface Focus 2014; 4:20130050. [PMID: 24501678 PMCID: PMC3886315 DOI: 10.1098/rsfs.2013.0050] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
It has been established that nerves and skeletal muscles respond and communicate via electrical signals. In regenerative medicine, there is current emphasis on using conductive nanomaterials to enhance electrical conduction through tissue-engineered scaffolds to increase cell differentiation and tissue regeneration. We investigated the role of chemically synthesized polyaniline (PANI) and poly(3,4-ethylenedioxythiophene) (PEDOT) conductive polymer nanofibres for conductive gels. To mimic a naturally derived extracellular matrix for cell growth, type I collagen gels were reconstituted with conductive polymer nanofibres and cells. Cell viability and proliferation of PC-12 cells and human skeletal muscle cells on these three-dimensional conductive collagen gels were evaluated in vitro. PANI and PEDOT nanofibres were found to be cytocompatible with both cell types and the best results (i.e. cell growth and gel electrical conductivity) were obtained with a low concentration (0.5 wt%) of PANI. After 7 days of culture in the conductive gels, the densities of both cell types were similar and comparable to collagen positive controls. Moreover, PC-12 cells were found to differentiate in the conductive hydrogels without the addition of nerve growth factor or electrical stimulation better than collagen control. Importantly, electrical conductivity of the three-dimensional gel scaffolds increased by more than 400% compared with control. The increased conductivity and injectability of the cell-laden collagen gels to injury sites in order to create an electrically conductive extracellular matrix makes these biomaterials very conducive for the regeneration of tissues.
Collapse
Affiliation(s)
- Sirinrath Sirivisoot
- Biological Engineering Program, Faculty of Engineering, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand
| | | | - Benjamin S. Harrison
- Wake Forest Institute for Regenerative Medicine, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA
| |
Collapse
|
335
|
Some biocompatibility aspects of conducting polymer polypyrrole evaluated with bone marrow-derived stem cells. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2013.06.030] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
336
|
|
337
|
Groothuis J, Ramsey NF, Ramakers GM, van der Plasse G. Physiological Challenges for Intracortical Electrodes. Brain Stimul 2014; 7:1-6. [DOI: 10.1016/j.brs.2013.07.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 07/01/2013] [Accepted: 07/08/2013] [Indexed: 02/08/2023] Open
|
338
|
Hu WW, Hsu YT, Cheng YC, Li C, Ruaan RC, Chien CC, Chung CA, Tsao CW. Electrical stimulation to promote osteogenesis using conductive polypyrrole films. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 37:28-36. [PMID: 24582219 DOI: 10.1016/j.msec.2013.12.019] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 11/08/2013] [Accepted: 12/06/2013] [Indexed: 01/06/2023]
Abstract
In this study, we developed an electrical cell culture and monitoring device. Polypyrrole (PPy) films with different resistances were fabricated as conductive surfaces to investigate the effect of substrate-mediated electrical stimulation. The physical and chemical properties of the devices, as well as their biocompatibilities, were thoroughly evaluated. These PPy films had a dark but transparent appearance, on which the surface cells could be easily observed. After treating with the osteogenic medium, rat bone marrow stromal cells cultured on the PPy films differentiated into osteoblasts. The cells grown on the PPy films had up-regulated osteogenic markers, and an alkaline phosphatase activity assay showed that the PPy films accelerated cell differentiation. Alizarin red staining and calcium analysis suggested that the PPy films promoted osteogenesis. Finally, PPy films were subjected to a constant electric field to elucidate the effect of electrical stimulation on osteogenesis. Compared with the untreated group, electrical stimulation improved calcium deposition in the extracellular matrix. Furthermore, PPy films with lower resistances allowed larger currents to stimulate the surface cells, which resulted in higher levels of mineralization. Overall, these results indicated that this system exhibited superior electroactivity with controllable electrical resistance and that it can be coated directly to produce medical devices with a transparent appearance, which should be beneficial for research on electrical stimulation for tissue regeneration.
Collapse
Affiliation(s)
- Wei-Wen Hu
- Department of Chemical and Materials Engineering, National Central University, Jhongli City, Taiwan.
| | - Yi-Ting Hsu
- Department of Chemical and Materials Engineering, National Central University, Jhongli City, Taiwan
| | - Yu-Che Cheng
- Institute of Biomedical Engineering, National Central University, Jhongli, Taiwan; Department of Medical Research, Cathay General Hospital, Taipei, Taiwan
| | - Chuan Li
- Department of Mechanical Engineering, National Central University, Jhongli, Taiwan
| | - Ruoh-Chyu Ruaan
- Department of Chemical and Materials Engineering, National Central University, Jhongli City, Taiwan; Institute of Biomedical Engineering, National Central University, Jhongli, Taiwan
| | - Chih-Cheng Chien
- Department of Medical Research, Cathay General Hospital, Taipei, Taiwan; School of Medicine, Fu Jen Catholic University, Taipei, Taiwan; Department of Anesthesiology, Sijhih Cathay General Hospital, Sijhih City, Taipei, Taiwan
| | - Chih-Ang Chung
- Department of Mechanical Engineering, National Central University, Jhongli, Taiwan
| | - Chia-Wen Tsao
- Department of Mechanical Engineering, National Central University, Jhongli, Taiwan
| |
Collapse
|
339
|
Li N, Zhang Q, Gao S, Song Q, Huang R, Wang L, Liu L, Dai J, Tang M, Cheng G. Three-dimensional graphene foam as a biocompatible and conductive scaffold for neural stem cells. Sci Rep 2013; 3:1604. [PMID: 23549373 PMCID: PMC3615386 DOI: 10.1038/srep01604] [Citation(s) in RCA: 367] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Accepted: 03/15/2013] [Indexed: 12/22/2022] Open
Abstract
Neural stem cell (NSC) based therapy provides a promising approach for neural regeneration. For the success of NSC clinical application, a scaffold is required to provide three-dimensional (3D) cell growth microenvironments and appropriate synergistic cell guidance cues. Here, we report the first utilization of graphene foam, a 3D porous structure, as a novel scaffold for NSCs in vitro. It was found that three-dimensional graphene foams (3D-GFs) can not only support NSC growth, but also keep cell at an active proliferation state with upregulation of Ki67 expression than that of two-dimensional graphene films. Meanwhile, phenotypic analysis indicated that 3D-GFs can enhance the NSC differentiation towards astrocytes and especially neurons. Furthermore, a good electrical coupling of 3D-GFs with differentiated NSCs for efficient electrical stimulation was observed. Our findings implicate 3D-GFs could offer a powerful platform for NSC research, neural tissue engineering and neural prostheses.
Collapse
Affiliation(s)
- Ning Li
- Suzhou Key Laboratory of Nanobiomedicine & Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, P. R. China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
340
|
Ag D, Seleci M, Bongartz R, Can M, Yurteri S, Cianga I, Stahl F, Timur S, Scheper T, Yagci Y. From invisible structures of SWCNTs toward fluorescent and targeting architectures for cell imaging. Biomacromolecules 2013; 14:3532-41. [PMID: 23987303 DOI: 10.1021/bm400862m] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Single-walled carbon nanotubes (SWNTs) are unique nanostructures used as cargo systems for variety of diagnostic and therapeutic agents. For taking advantage of these structures in biological processes, they should be visible. Therefore, fluorescence labeling of SWCNTs with various probes is a significant issue. Herein, we demonstrate a simple approach for cell specific imaging and diagnosis by combining SWCNTs with a copolymer poly(para-phenylene) (PPP) containing polystyrene (PSt) and poly(ε-caprolactone) (PCL) side chains (PPP-g-PSt-PCL). In this approach PPP-g-PSt-PCL is noncovalently attached on carboxyl functional SWCNTs. The obtained fluorescent probe is bound to folic acid (FA) for targeted imaging of folate receptor (FR) positive HeLa cells. In vitro studies demonstrate that this conjugate can specifically bind to HeLa cells and indicate great potential for targeting and imaging studies.
Collapse
Affiliation(s)
- Didem Ag
- Department of Biochemistry, Faculty of Science, Ege University , 35100 Bornova-Izmir, Turkey
| | | | | | | | | | | | | | | | | | | |
Collapse
|
341
|
Thrivikraman G, Mallik PK, Basu B. Substrate conductivity dependent modulation of cell proliferation and differentiation in vitro. Biomaterials 2013; 34:7073-85. [DOI: 10.1016/j.biomaterials.2013.05.076] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Accepted: 05/29/2013] [Indexed: 11/26/2022]
|
342
|
|
343
|
Bagherzadeh R, Latifi M, Kong L. Three-dimensional pore structure analysis of polycaprolactone nano-microfibrous scaffolds using theoretical and experimental approaches. J Biomed Mater Res A 2013; 102:903-10. [PMID: 23554325 DOI: 10.1002/jbm.a.34736] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Accepted: 03/07/2013] [Indexed: 12/25/2022]
Abstract
In this article the pore structure and porosity parameters of polycaprolactone (PCL) nano-microfibrous scaffolds are investigated using a predicting theoretical model and a nondestructive evaluation approach based on confocal laser scanning microscopy (CLSM) and three-dimensional image analysis. Different fibrous scaffolds with different fiber diameters produced by electrospinning process and their 3D-pore structure were evaluated theoretically and also compared to results of CLSM and capillary flow porometery methods. The effect of polymer concentration on the pore structure of scaffolds was also investigated. The results showed that, the introduced approach not only can measure the pore size distribution of nanofibrous scaffolds, but also can measure pore interconnectivity of fibrous scaffolds. Furthermore, the results showed that increasing the fiber diameter resulted from increasing the polymer concentration in solvent can effectively increase the pore dimensions within the scaffold structure.
Collapse
Affiliation(s)
- Roohollah Bagherzadeh
- ATMT Research Institute, Textile Engineering Department, Amirkabir University of Technology, Tehran, Iran; Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC 3216, Australia
| | | | | |
Collapse
|
344
|
Lee JY. Electrically Conducting Polymer-Based Nanofibrous Scaffolds for Tissue Engineering Applications. POLYM REV 2013. [DOI: 10.1080/15583724.2013.806544] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
345
|
Nateghi MR, Dehghan S, Shateri-Khalilabad M. A Facile Route for Fabrication of Conductive Hydrophobic Textile Materials Using N-octyl/N-perfluorohexyl Substituted Polypyrrole. INT J POLYM MATER PO 2013. [DOI: 10.1080/00914037.2013.769167] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
346
|
|
347
|
Yue Z, Moulton SE, Cook M, O'Leary S, Wallace GG. Controlled delivery for neuro-bionic devices. Adv Drug Deliv Rev 2013; 65:559-69. [PMID: 22705546 DOI: 10.1016/j.addr.2012.06.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Revised: 05/16/2012] [Accepted: 06/08/2012] [Indexed: 12/19/2022]
Abstract
Implantable electrodes interface with the human body for a range of therapeutic as well as diagnostic applications. Here we provide an overview of controlled delivery strategies used in neuro-bionics. Controlled delivery of bioactive molecules has been used to minimise reactive cellular and tissue responses and/or promote nerve preservation and neurite outgrowth toward the implanted electrode. These effects are integral to establishing a chronically stable and effective electrode-neural communication. Drug-eluting bioactive coatings, organic conductive polymers, or integrated microfabricated drug delivery channels are strategies commonly used.
Collapse
|
348
|
Bagherzadeh R, Najar SS, Latifi M, Tehran MA, Kong L. A theoretical analysis and prediction of pore size and pore size distribution in electrospun multilayer nanofibrous materials. J Biomed Mater Res A 2013; 101:2107-17. [PMID: 23426993 DOI: 10.1002/jbm.a.34487] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Revised: 10/02/2012] [Accepted: 10/08/2012] [Indexed: 12/26/2022]
Abstract
Electrospinning process can fabricate nanomaterials with unique nanostructures for potential biomedical and environmental applications. However, the prediction and, consequently, the control of the porous structure of these materials has been impractical due to the complexity of the electrospinning process. In this research, a theoretical model for characterizing the porous structure of the electrospun nanofibrous network has been developed by combining the stochastic and stereological probability approaches. From consideration of number of fiber-to-fiber contacts in an electrospun nanofibrous assembly, geometrical and statistical theory relating morphological and structural parameters of the network to the characteristic dimensions of interfibers pores is provided. It has been shown that these properties are strongly influenced by the fiber diameter, porosity, and thickness of assembly. It is also demonstrated that at a given network porosity, increasing fiber diameter and thickness of the network reduces the characteristic dimensions of pores. It is also discussed that the role of fiber diameter and number of the layer in the assembly is dominant in controlling the pore size distribution of the networks. The theory has been validated experimentally and results compared with the existing theory to predict the pore size distribution of nanofiber mats. It is believed that the presented theory for estimation of pore size distribution is more realistic and useful for further studies of multilayer random nanofibrous assemblies.
Collapse
Affiliation(s)
- Roohollah Bagherzadeh
- Textile Engineering Department, ATMT Research Institute, Amirkabir University of Technology, Tehran, Iran.
| | | | | | | | | |
Collapse
|
349
|
Vishnoi T, Kumar A. Conducting cryogel scaffold as a potential biomaterial for cell stimulation and proliferation. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:447-459. [PMID: 23124526 DOI: 10.1007/s10856-012-4795-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 10/15/2012] [Indexed: 06/01/2023]
Abstract
The aim of the study was to demonstrate the potential of the cryogelation technique for the synthesis of the conducting cryogel scaffolds which would encompass the advantages of the cryogel matrix, like the mechanical strength and interconnected porous network as well as the conductive properties of the incorporated conducting polymeric material, polypyrrole. The cryogels were synthesized using different combinations of oxidizing agents and surfactants like, sodium dodecyl sulfate (SDS)/ammonium persulfate (APS), SDS/iron chloride (FeCl(3)), cetyl trimethyl ammonium bromide (CTAB)/APS, and CTAB/FeCl(3). The synthesized gels were characterized by scanning electron microscopic analysis for morphology, Fourier transform infrared spectroscopy for analyzing the presence of the polypyrrole (0.5-4 %) as nano-fillers in the gel. It was observed that the presence of these nano-fillers increased the swelling ratio by approximately 50 %. The synthesized conducting cryogels displayed high stress bearing capacity without being deformed as analysed by rheological measurements. The degradation studies showed 12-15 % degradation in 4 weeks time. In vitro studies with conducting and non-conducting cryogel scaffold were carried out to optimize the stimulation conditions for the two cell lines, neuro2a and cardiac muscle C2C12. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay showed approximately 25 and 15 % increase in the cell proliferation rate for neuro2a and C2C12 cell line, respectively. This was observed at a specific voltage of 100 mV and 2 V, for a specified duration of 2 h and 1 min, respectively for the conducting scaffold as compared to the control. This can play an important role in tissue engineering applications for cell lines where acquiring a high cell number and functionality is desired.
Collapse
Affiliation(s)
- Tanushree Vishnoi
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, 208016, UP, India
| | | |
Collapse
|
350
|
Muller D, Silva J, Rambo C, Barra G, Dourado F, Gama F. Neuronal cells’ behavior on polypyrrole coated bacterial nanocellulose three-dimensional (3D) scaffolds. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2013; 24:1368-77. [DOI: 10.1080/09205063.2012.761058] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- D. Muller
- a Department of Biological Engineering , Centre of Biological Engineering, IBB-Institute for Biotechnology and Bioengineering, University of Minho, Campus de Gualtar , Braga , 4710-057 , Portugal
- b Department of Mechanical Engineering , Federal University of Santa Catarina , Florianópolis , 88040-900 , Brazil
| | - J.P. Silva
- a Department of Biological Engineering , Centre of Biological Engineering, IBB-Institute for Biotechnology and Bioengineering, University of Minho, Campus de Gualtar , Braga , 4710-057 , Portugal
| | - C.R. Rambo
- c Department of Electrical Engineering , Federal University of Santa Catarina , Florianópolis , 88040-900 , Brazil
| | - G.M.O. Barra
- b Department of Mechanical Engineering , Federal University of Santa Catarina , Florianópolis , 88040-900 , Brazil
| | - F. Dourado
- a Department of Biological Engineering , Centre of Biological Engineering, IBB-Institute for Biotechnology and Bioengineering, University of Minho, Campus de Gualtar , Braga , 4710-057 , Portugal
| | - F.M. Gama
- a Department of Biological Engineering , Centre of Biological Engineering, IBB-Institute for Biotechnology and Bioengineering, University of Minho, Campus de Gualtar , Braga , 4710-057 , Portugal
| |
Collapse
|