Postproduction Processing of Electrospun Fibres for Tissue Engineering

被引:31
作者
Bye, Frazer J. [1 ]
Wang, Linge [2 ]
Bullock, Anthony J. [1 ]
Blackwood, Keith A. [1 ]
Ryan, Anthony J. [3 ]
MacNeil, Sheila [1 ]
机构
[1] Univ Sheffield, Sheffield S10 2TN, S Yorkshire, England
[2] Univ Sheffield, Dept Biomed Sci, Sheffield S10 2TN, S Yorkshire, England
[3] Univ Sheffield, Dept Chem, Sheffield S10 2TN, S Yorkshire, England
来源
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS | 2012年 / 66期
基金
英国生物技术与生命科学研究理事会;
关键词
Bioengineering; Issue; 66; Materials Science; Biomedical Engineering; Tissue Engineering; Medicine; Chemistry; Electrospinning; bilayer; biaxial distension; heat and vapour annealing; mechanical testing; fibres; NANOFIBERS; SCAFFOLDS;
D O I
10.3791/4172
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Electrospinning is a commonly used and versatile method to produce scaffolds (often biodegradable) for 3D tissue engineering.(1, 2, 3) Many tissues in vivo undergo biaxial distension to varying extents such as skin, bladder, pelvic floor and even the hard palate as children grow. In producing scaffolds for these purposes there is a need to develop scaffolds of appropriate biomechanical properties (whether achieved without or with cells) and which are sterile for clinical use. The focus of this paper is not how to establish basic electrospinning parameters (as there is extensive literature on electrospinning) but on how to modify spun scaffolds post production to make them fit for tissue engineering purposes here thickness, mechanical properties and sterilisation (required for clinical use) are considered and we also describe how cells can be cultured on scaffolds and subjected to biaxial strain to condition them for specific applications. Electrospinning tends to produce thin sheets; as the electrospinning collector becomes coated with insulating fibres it becomes a poor conductor such that fibres no longer deposit on it. Hence we describe approaches to produce thicker structures by heat or vapour annealing increasing the strength of scaffolds but not necessarily the elasticity. Sequential spinning of scaffolds of different polymers to achieve complex scaffolds is also described. Sterilisation methodologies can adversely affect strength and elasticity of scaffolds. We compare three methods for their effects on the biomechanical properties on electrospun scaffolds of poly lactic-co-glycolic acid (PLGA). Imaging of cells on scaffolds and assessment of production of extracellular matrix (ECM) proteins by cells on scaffolds is described. Culturing cells on scaffolds in vitro can improve scaffold strength and elasticity but the tissue engineering literature shows that cells often fail to produce appropriate ECM when cultured under static conditions. There are few commercial systems available that allow one to culture cells on scaffolds under dynamic conditioning regimes - one example is the Bose Electroforce 3100 which can be used to exert a conditioning programme on cells in scaffolds held using mechanical grips within a media filled chamber.(4) An approach to a budget cell culture bioreactor for controlled distortion in 2 dimensions is described. We show that cells can be induced to produce elastin under these conditions. Finally assessment of the biomechanical properties of processed scaffolds cultured with or without cells is described.
引用
收藏
页数:8
相关论文
共 16 条
[1]   Development of biodegradable electrospun scaffolds for dermal replacement [J].
Blackwood, Keith A. ;
McKean, Rob ;
Canton, Irene ;
Freeman, Christine O. ;
Franklin, Kirsty L. ;
Cole, Daryl ;
Brook, Ian ;
Farthing, Paula ;
Rimmer, Stephen ;
Haycock, John W. ;
Ryan, Anthony J. ;
MacNeil, Sheila .
BIOMATERIALS, 2008, 29 (21) :3091-3104
[2]   Development of an lbuprofen-Releasing Biodegradable PLA/PGA Electrospun Scaffold for Tissue Regeneration [J].
Canton, Irene ;
Mckean, Robert ;
Charnley, Mirren ;
Blackwood, Keith A. ;
Fiorica, Calogero ;
Ryan, Anthony J. ;
MacNeil, Sheila .
BIOTECHNOLOGY AND BIOENGINEERING, 2010, 105 (02) :396-408
[3]   Controlled deposition of electrospun poly(ethylene oxide) fibers [J].
Deitzel, JM ;
Kleinmeyer, JD ;
Hirvonen, JK ;
Tan, NCB .
POLYMER, 2001, 42 (19) :8163-8170
[4]   Beaded nanofibers formed during electrospinning [J].
Fong, H ;
Chun, I ;
Reneker, DH .
POLYMER, 1999, 40 (16) :4585-4592
[5]   Controlling the fiber diameter during electrospinning [J].
Fridrikh, SV ;
Yu, JH ;
Brenner, MP ;
Rutledge, GC .
PHYSICAL REVIEW LETTERS, 2003, 90 (14) :4
[6]   Tissue engineering solutions for cleft palates [J].
Moreau, Jennifer L. ;
Caccamese, John F. ;
Coletti, Dominick P. ;
Sauk, John J. ;
Fisher, John P. .
JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY, 2007, 65 (12) :2503-2511
[7]   Guided Bone Regeneration: biological principle and therapeutic applications [J].
Retzepi, M. ;
Donos, N. .
CLINICAL ORAL IMPLANTS RESEARCH, 2010, 21 (06) :567-576
[8]   Developing biodegradable scaffolds for tissue engineering of the urethra [J].
Selim, Mohamed ;
Bullock, Anthony J. ;
Blackwood, Keith A. ;
Chapple, Christopher R. ;
MacNeil, Sheila .
BJU INTERNATIONAL, 2011, 107 (02) :296-302
[9]   Electro spinning: Applications in drug delivery and tissue engineering [J].
Sill, Travis J. ;
von Recum, Horst A. .
BIOMATERIALS, 2008, 29 (13) :1989-2006
[10]  
Sittichokechaiwut A, 2010, EUR CELLS MATER, V20, P45