The interactions of astrocytes and fibroblasts with defined pore structures in static and perfusion cultures

Sun, T., Donoghue, P.S., Higginson, J.R., Gadegaard, N. , Barnett, S.C. and Riehle, M.O. (2011) The interactions of astrocytes and fibroblasts with defined pore structures in static and perfusion cultures. Biomaterials, 32(8), pp. 2021-2031. (doi:10.1016/j.biomaterials.2010.11.046)

Sun, T., Donoghue, P.S., Higginson, J.R., Gadegaard, N. , Barnett, S.C. and Riehle, M.O. (2011) The interactions of astrocytes and fibroblasts with defined pore structures in static and perfusion cultures. Biomaterials, 32(8), pp. 2021-2031. (doi:10.1016/j.biomaterials.2010.11.046)

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Abstract

Open pores to maintain nutrient diffusion and waste removal after cell colonization are crucial for the successful application of constructs based on assembled membranes, in our case tubular scaffolds made of [var epsilon]-polycaprolactone (PCL), for use in tissue engineering. Due to the complex three-dimensional structure and large size of such scaffolds needed for transplantable tissues, it is difficult to investigate the cell-pore interactions in situ. Therefore miniaturized bioreactors inside Petri dishes (30ámm in diameter), containing porous PCL or poly-dimethylsiloxane (PDMS) membranes, were developed to allow the interactions of different cells with defined pores to be investigated in situ during both static and perfusion cultures. Investigation of two different cell types (fibroblasts and cortical astrocytes) and how they interact with a range of pores (100-350á[mu]m in diameter) for up to 50 days indicated that the cells either [`]covered' or [`]bridged' the pores. Three distinct behaviors were observed in the way cortical astrocytes interacted with pores, while fibroblasts were able to quickly bridge the pores based on consistent "joint efforts". Our studies demonstrate that the distinct pore sealing behaviors of both cell types were influenced by pore size, initial cell density and culture period, but not by medium perfusion within the range of shear forces investigated. These findings form important basic data about the usability of pores within scaffolds that could inform the design and fabrication of suitable scaffolds for various applications in tissue engineering

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Higginson, Dr Jennifer and Riehle, Dr Mathis and Barnett, Professor Susan and Sun, Dr Tao and Gadegaard, Professor Nikolaj and Donoghue, Dr Peter
Authors: Sun, T., Donoghue, P.S., Higginson, J.R., Gadegaard, N., Barnett, S.C., and Riehle, M.O.
College/School:College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation
College of Medical Veterinary and Life Sciences > Institute of Molecular Cell and Systems Biology
College of Science and Engineering > School of Engineering > Biomedical Engineering
Journal Name:Biomaterials
ISSN:0142-9612
ISSN (Online):1878-5905
Published Online:15 December 2010

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
481921Micro Engineered Constructs for CNS repairSusan BarnettBiotechnology and Biological Sciences Research Council (BBSRC)BB/G004706/1III -IMMUNOLOGY