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Subject = cartilage;
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Displaying Results 1 - 25 of 33 on page 1 of 2
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Adipose mesenchymal stromal cell-based therapy for severe osteoarthritis of the knee: a phase i dose-escalation trial
(2018)
Pers, Yves-Marie; Rackwitz, Lars; Ferreira, Rosanna; Pullig, Oliver; Delfour, Christoph...
Adipose mesenchymal stromal cell-based therapy for severe osteoarthritis of the knee: a phase i dose-escalation trial
(2018)
Pers, Yves-Marie; Rackwitz, Lars; Ferreira, Rosanna; Pullig, Oliver; Delfour, Christophe; Barry, Frank; Sensebe, Luc; Casteilla, Louis; Fleury, Sandrine; Bourin, Philippe; Noël, Danièle; Canovas, François; Cyteval, Catherine; Lisignoli, Gina; Schrauth, Joachim; Haddad, Daniel; Domergue, Sophie; Noeth, Ulrich; Jorgensen, Christian; ,
Abstract:
Osteoarthritis (OA) is the most widespread musculoskeletal disorder in adults. It leads to cartilage damage associated with subchondral bone changes and synovial inflammation, causing pain and disability. The present study aimed at evaluating the safety of a dose-escalation protocol of intra-articular injected adipose-derived stromal cells (ASCs) in patients with knee OA, as well as clinical efficacy as secondary endpoint. A bicentric, uncontrolled, open phase I clinical trial was conducted in France and Germany with regulatory agency approval for ASC expansion procedure in both countries. From April 2012 to December 2013, 18 consecutive patients with symptomatic and severe knee OA were treated with a single intra-articular injection of autologous ASCs. The study design consisted of three consecutive cohorts (six patients each) with dose escalation: low dose (2 x 10(6) cells), medium dose (10 x 10(6)), and high dose (50 x 10(6)). The primary outcome parameter was safety evaluated by...
http://hdl.handle.net/10379/13455
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Allogeneic cell therapy for osteoarthritis
(2016)
Lohan, Paul
Allogeneic cell therapy for osteoarthritis
(2016)
Lohan, Paul
Abstract:
Osteoarthritis is a debilitating multi-factorial joint disease which currently has no cure. Due to the significant immune cell mediated component in this disease a therapy which can modulate this inflammation and promote cartilage healing is urgently required. An allogeneic cell therapy could be particularly beneficial in OA. One such allogeneic cell is the mesenchymal stem cell (MSC). MSC, in addition to their chondrogenic differentiation capacity, possess potent immunomodulatory capabilities in the undifferentiated state. The first part of this work focused on the immune properties of allogeneic MSC after differentiation to a chondrogenic lineage. The work found that after chondrogenic differentiation MSC upregulate immunogenic cell surface molecules such as MHCI, MHCII, CD80 and CD86 and are functionally more immunogenic in vitro. Additionally these cells were found to lose their ability to modulate allogeneic lymphocyte proliferation in in vitro co-culture assays, possibly due ...
http://hdl.handle.net/10379/5772
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Cell-free multi-layered collagen-based scaffolds demonstrate layer specific regeneration of functional osteochondral tissue in caprine joints
(2018)
Levingstone, Tanya J.; Ramesh, Ashwanth; Brady, Robert T.; Brama, Pieter A.J.; Kearney,...
Cell-free multi-layered collagen-based scaffolds demonstrate layer specific regeneration of functional osteochondral tissue in caprine joints
(2018)
Levingstone, Tanya J.; Ramesh, Ashwanth; Brady, Robert T.; Brama, Pieter A.J.; Kearney, Clodagh; Gleeson, John P.; O'Brien, Fergal J.
http://hdl.handle.net/10379/12433
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Cell-free multi-layered collagen-based scaffolds demonstrate layer specific regeneration of functional osteochondral tissue in caprine joints.
(2016)
Levingstone, Tanya J; Ramesh, Ashwanth; Brady, Robert T; Brama, Pieter AJ; Kearney, Clo...
Cell-free multi-layered collagen-based scaffolds demonstrate layer specific regeneration of functional osteochondral tissue in caprine joints.
(2016)
Levingstone, Tanya J; Ramesh, Ashwanth; Brady, Robert T; Brama, Pieter AJ; Kearney, Clodagh; Gleeson, John P; O'Brien, Fergal
Abstract:
<p>The original article is available at www.sciencedirect.com</p>
<p>Developing repair strategies for osteochondral tissue presents complex challenges due to its interfacial nature and complex zonal structure, consisting of subchondral bone, intermediate calcified cartilage and the superficial cartilage regions. In this study, the long term ability of a multi-layered biomimetic collagen-based scaffold to repair osteochondral defects is investigated in a large animal model: namely critical sized lateral trochlear ridge (TR) and medial femoral condyle (MC) defects in the caprine stifle joint. The study thus presents the first data in a clinically applicable large animal model. Scaffold fixation and early integration was demonstrated at 2 weeks post implantation. Macroscopic analysis demonstrated improved healing in the multi-layered scaffold group compared to empty defects and a market approved synthetic polymer osteochondral scaffold groups at 6 and 12 months po...
https://epubs.rcsi.ie/anatart/93
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Composition-function relations of cartilaginous tissues engineered from chondrocytes and mesenchymal stem cells isolated from bone marrow and infrapatellar fat pad
(2011)
KELLY, DANIEL; BUCKLEY, CONOR; VINARDELL, TATIANA
Composition-function relations of cartilaginous tissues engineered from chondrocytes and mesenchymal stem cells isolated from bone marrow and infrapatellar fat pad
(2011)
KELLY, DANIEL; BUCKLEY, CONOR; VINARDELL, TATIANA
Abstract:
The objective of this study was to determine the functional properties of cartilaginous tissues generated by porcine MSCs isolated from different tissue sources, and to compare these properties to those derived from chondrocytes (CC). MSCs were isolated from bone marrow (BM) and infrapatellar fat pad (FP), while CC were harvested from the articular surface of the femoro-patellar joint. Culture-expanded CC and MSCs were encapsulated in agarose hydrogels and cultured in the presence of TGF-?3. Samples were analysed biomechanically, biochemically and histologically at day 0, day 21 and day 42. After 42 days in free swelling culture, mean GAG content was 1.50 % w/w in CC seeded constructs, compared to 0.95 % w/w in FP and 0.43 % w/w in BM seeded constructs. Total collagen accumulation was highest in FP constructs. DNA content increased with time for all the groups. The mechanical functionality of cartilaginous tissues engineered using CCs was superior to that generated from either sourc...
http://hdl.handle.net/2262/60816
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Computational investigation of in situ chondrocyte deformation and actin cytoskeleton remodelling under physiological loading
(2016)
Dowling, Enda P.; Ronan, William; McGarry, J. Patrick
Computational investigation of in situ chondrocyte deformation and actin cytoskeleton remodelling under physiological loading
(2016)
Dowling, Enda P.; Ronan, William; McGarry, J. Patrick
Abstract:
Previous experimental studies have determined local strain fields for both healthy and degenerate cartilage tissue during mechanical loading. However, the biomechanical response of chondrocytes in situ, in particular the response of the actin cytoskeleton to physiological loading conditions, is poorly understood. In the current study a three-dimensional (3-D) representative volume element (RVE) for cartilage tissue is created, comprising a chondrocyte surrounded by a pericellular matrix and embedded in an extracellular matrix. A 3-D active modelling framework incorporating actin cytoskeleton remodelling and contractility is implemented to predict the biomechanical behaviour of chondrocytes. Physiological and abnormal strain fields, based on the experimental study of Wong and Sah (J. Orthop. Res. 2010; 28: 1554-1561), are applied to the RVE. Simulations demonstrate that the presence of a focal defect significantly affects cellular deformation, increases the stress experienced by the ...
http://hdl.handle.net/10379/5938
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Effect of a degraded core on the mechanical behaviour of tissue-engineered cartilage constructs: a poro-elastic finite element analysis
(2004)
KELLY, DANIEL; PRENDERGAST, PATRICK JOHN
Effect of a degraded core on the mechanical behaviour of tissue-engineered cartilage constructs: a poro-elastic finite element analysis
(2004)
KELLY, DANIEL; PRENDERGAST, PATRICK JOHN
Abstract:
peer-reviewed
The structure and functionality of tissue-engineered cartilage is determined by the tissue culture conditions and mechanical conditioning during growth. The quality of tissue-engineered cartilage can be evaluated using tests such as the confined compression test. Tissue-engineered cartilage constructs usually consist of an outer layer of cartilage and an inner core of either undeveloped cartilage or degrading scaffold material. A biphasic poro-elastic finite element model was used to demonstrate how such a core influences the reaction force-time curve obtained from a confined compression test. The finite element model predicted that higher volumes of degraded scaffold in the inner core would reduce the aggregate modulus calculated from the confined compression test and raised the estimate of tissue permeability. The predicted aggregate modulus reduced from 0.135 MPa, for a homogenous construct, to 0.068 MPa, for a construct that was only 70% cartilaginous. It was...
http://hdl.handle.net/2262/29047
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Feasibility of mesenchmyal stem cells as modulators of inflammation and as a cellular model to study cartilage damage in osteoarthritis
(2020)
Raman, Swarna
Feasibility of mesenchmyal stem cells as modulators of inflammation and as a cellular model to study cartilage damage in osteoarthritis
(2020)
Raman, Swarna
Abstract:
Osteoarthritis (OA) is the most common degenerative condition affecting whole joints and causing pain and cartilage degeneration, particularly in the elderly population. Inflammation of the synovium is now recognised as an important clinical feature initiating and promoting disease progression. Activated macrophages and T lymphocytes infiltrating the OA synovial lining mediate inflammatory responses such as production of pro-inflammatory cytokines, which can induce destructive processes in the cartilage. In addition to this danger signals like alarmins, released as an immune response, further lead to production of soluble mediators that could accelerate cartilage matrix degradation resulting in altered chondrocyte behaviour and hypertrophy. Mesenchymal stem cells (MSCs) have been considered as an attractive option for OA cell therapy. However, inflammation induced catabolic factors are also known to negatively impact cartilage engineering strategies, perhaps inhibiting the use of th...
http://hdl.handle.net/10379/15874
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Glyoxal cross-linking of solubilized extracellular matrix to produce highly porous, elastic, and chondro-permissive scaffolds for orthopedic tissue engineering
(2019)
Buckley, Conor; Dunne, Aisling; Kelly, Daniel
Glyoxal cross-linking of solubilized extracellular matrix to produce highly porous, elastic, and chondro-permissive scaffolds for orthopedic tissue engineering
(2019)
Buckley, Conor; Dunne, Aisling; Kelly, Daniel
Abstract:
Extracellular matrix (ECM)-derived implants hold great promise for tissue repair, but new strategies are required to produce efficiently decellularized scaffolds with the necessary porosity and mechanical properties to facilitate regeneration. In this study, we demonstrate that it is possible to produce highly porous, elastic, articular cartilage (AC) ECM-derived scaffolds that are efficiently decellularized, nonimmunogenic, and chondro-permissive. Pepsin solubilized porcine AC was cross-linked with glyoxal, lyophilized and then subjected to dehydrothermal treatment. The resulting scaffolds were predominantly collagenous in nature, with the majority of sulphated glycosaminoglycan (sGAG) and DNA removed during scaffold fabrication. Four scaffold variants were produced to examine the effect of both ECM (10 or 20 mg/mL) and glyoxal (5 or 10 mM) concentration on the mechanical and biological properties of the resulting construct. When seeded with human infrapatellar fat pad-derived stro...
http://hdl.handle.net/2262/91271
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Human osteoarthritic synovium impacts chondrogenic differentiation of mesenchymal stem cells via macrophage polarisation state
(2018)
Fahy, N.; de Vries-van Melle, M.L.; Lehmann, J.; Wei, W.; Grotenhuis, N.; Farrell, E.; ...
Human osteoarthritic synovium impacts chondrogenic differentiation of mesenchymal stem cells via macrophage polarisation state
(2018)
Fahy, N.; de Vries-van Melle, M.L.; Lehmann, J.; Wei, W.; Grotenhuis, N.; Farrell, E.; van der Kraan, P.M.; Murphy, J.M.; Bastiaansen-Jenniskens, Y.M.; van Osch, G.J.V.M.
http://hdl.handle.net/10379/11395
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Hypoxia activates the PTHrP – Zfp521 – MEF2C pathway to attenuate hypertrophy in mesenchymal stem cell derived cartilage
(2016)
Browe, David
Hypoxia activates the PTHrP – Zfp521 – MEF2C pathway to attenuate hypertrophy in mesenchymal stem cell derived cartilage
(2016)
Browe, David
Abstract:
The treatment of cartilage defects remains an unmet medical need as the current treatment options are currently sub-optimal as the most common treatment options; microfracture and autologous chondrocyte implantation (ACI) result in repair tissue consisting of predominantly fibro-cartilage rather than hyaline cartilage. Due to the ability of mesenchymal stem cells (MSCs) to differentiate along the cartilage lineage, MSCs have been touted as a cellular source to regenerate damaged cartilage. However, a number of prevailing concerns for such a treatment remain. Generally, administration of MSCs into a cartilage defect results in poor regeneration of the damaged cartilage, with most clinical trials reporting that as with microfracture and ACI, the repaired cartilage consists of fibro-cartilage rather than hyaline cartilage. Methods that improve the chondrogenic potential of transplanted MSCs in vivo may be advantageous. In addition, the proclivity of MSC-derived cartilage to undergo hyp...
http://hdl.handle.net/10379/5719
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Immunomodulation by interleukin-10 overexpressing mesenchymal stem cells for cartilage repair in osteoarthritis
(2015)
Fahy, Niamh
Immunomodulation by interleukin-10 overexpressing mesenchymal stem cells for cartilage repair in osteoarthritis
(2015)
Fahy, Niamh
Abstract:
Although osteoarthritis (OA) is typically characterised by the loss or damage to articular cartilage, inflammation of the synovial membrane is now recognised as a prevalent feature believed to contribute to both symptoms and disease progression. Macrophages localised to the synovial lining are primary mediators of inflammation in the joint, responsible for the production of pro-inflammatory cytokines which can induce destructive processes in neighbouring cartilage. Furthermore, T lymphocytes have been identified as the most abundant infiltrating immune cells present in OA synovium. The release of pro-inflammatory cytokines as well as soluble mediators produced by inflamed synovium may accelerate cartilage matrix degradation. Furthermore, osteoarthritic synovium may inhibit the chondrogenic differentiation of Mesenchymal Stem Cells (MSCs) in cell replacement strategies for the treatment of OA. In light of the increasing evidence highlighting the role of inflammation in driving OA pro...
http://hdl.handle.net/10379/5039
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Implantation of hyaluronic acid hydrogel prevents the pain phenotype in a rat model of intervertebral disc injury
(2018)
Mohd Isa, Isma Liza; Abbah, Sunny A.; Kilcoyne, Michelle; Sakai, Daisuke; Dockery, Pete...
Implantation of hyaluronic acid hydrogel prevents the pain phenotype in a rat model of intervertebral disc injury
(2018)
Mohd Isa, Isma Liza; Abbah, Sunny A.; Kilcoyne, Michelle; Sakai, Daisuke; Dockery, Peter; Finn, David P.; Pandit, Abhay
Abstract:
Painful intervertebral disc degeneration is mediated by inflammation that modulates glycosylation and induces hyperinnervation and sensory sensitization, which result in discogenic pain. Hyaluronic acid (HA) used as a therapeutic biomaterial can reduce inflammation and pain, but the effects ofHA therapy on glycosylation and pain associated with disc degeneration have not been previously determined. We describe a novel rat model of pain induced by intervertebral disc injury, with validation of the pain phenotype by morphine treatment. Using this model, we assessed the efficacy of HA hydrogel for the alleviation of pain, demonstrating that it reduced nociceptive behavior, an effect associated with down-regulation of nociception markers and inhibition of hyperinnervation. Furthermore, HA hydrogel altered glycosylation and modulated key inflammatory and regulatory signaling pathways, resulting in attenuation of inflammation and regulation of matrix components. Our results suggest that H...
http://hdl.handle.net/10379/12046
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Integrating non-viral gene therapy and 3D bioprinting for bone, cartilage and osteochondral tissue engineering
(2018)
GONZALEZ FERNANDEZ, TOMAS
Integrating non-viral gene therapy and 3D bioprinting for bone, cartilage and osteochondral tissue engineering
(2018)
GONZALEZ FERNANDEZ, TOMAS
Abstract:
The repair of osteochondral defects, affecting both the articular cartilage and the underlying subchondral bone, is key for the effective recovery of joint homeostasis and the prevention of further cartilage degeneration and the onset of osteoarthritis (OA). Although important advances have been made in the field of tissue engineering to regenerate these injuries, the traditional approaches based on the formation of homogenous tissues fail to recapitulate the spatial complexity of the osteochondral unit. The objective of this thesis was to engineer a multiphasic tissue suitable for osteochondral defect regeneration by combining 3D bioprinting and non-viral gene delivery to spatially regulate the differentiation of mesenchymal stem cells (MSCs). Realising this objective first required (1) optimisation of the non-viral gene delivery vector, (2) the identification of suitable therapeutic gene combinations to direct MSC differentiation and (3) the development of printable biomaterials,...
http://hdl.handle.net/2262/82502
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Intra-extrafibrillar mixture formulation of soft charged tissues
(1999)
Huyghe, Jacques M.
Intra-extrafibrillar mixture formulation of soft charged tissues
(1999)
Huyghe, Jacques M.
Abstract:
The volume of the intrafibrillar water space - i.e. the water contained inside the collagen fibers - is a key parameter that is relevant to concepts of connective tissue structure and function. Because existing theories of finite deformation of cartilaginous tissues do not distinguish between intra- and extrafibrillar water, we derive a chemo-electro-mechanical formulation of quasi-static finite deformation including such distinctions. The model features a porous solid saturated with two fluid compartments, in which an arbitrary number of solutes are dissolved. Each fluid compartment has its own fixed charge density. Incompressible deformation is assumed. Each fluid compartment is assumed to be locally electroneutral. Balance laws are derived for each constituent and for the mixture as a whole. A Lagrangian form of the second law of thermodynamics for incompressible porous media is used to derive the constitutive restrictions of the medium. The material properties are shown to be co...
http://hdl.handle.net/10344/7161
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Isolation and phenotypic characterisation of stem cells from late stage osteoarthritic mesenchymal tissues
(2018)
Labusca, Luminita; Zugun-Eloae, Florin; Shaw, Georgina; Botez, Paul; Barry, Frank; Mash...
Isolation and phenotypic characterisation of stem cells from late stage osteoarthritic mesenchymal tissues
(2018)
Labusca, Luminita; Zugun-Eloae, Florin; Shaw, Georgina; Botez, Paul; Barry, Frank; Mashayekhi, Kaveh
Abstract:
Introduction: Osteoarthritis (OA) represents an increasing health issue worldwide. Regenerative medicine (RM) has raised the hope for introducing revolutionary therapies in clinical practice. Detection of autologus cell sources can improve accessibility to RM strategies. Objectives: To assess the presence and biological potential of mesehchymal stem cells in three tissues (subchondral bone, synovial layer, periarticular adipose tissue) in late stages osteoarthritic patients. Material and Methods: Samples were collected from subjects undergoing total knee replacement (TKR). MSCs were isolated and cultured in complete alpha MEM with beta FGF. Cell morphology and growth potential was assessed. Flow cytometry was used for detection of several relevant cell surface markers. Quantitative and qualitative assessment of differentiation potential towards three mesenchymal lineages (osteogenesis adipogenesis chondrogenesis) was performed. Time lapse life cell imaging of nondiferentiated cells ...
http://hdl.handle.net/10379/12350
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Multi-layered collagen-based scaffolds for osteochondral defect repair in rabbits.
(2016)
Levingstone, Tanya J; Thompson, Emmet; Matsiko, Amos; Schepens, Alexander; Gleeson, Joh...
Multi-layered collagen-based scaffolds for osteochondral defect repair in rabbits.
(2016)
Levingstone, Tanya J; Thompson, Emmet; Matsiko, Amos; Schepens, Alexander; Gleeson, John Patrick; O'Brien, Fergal
Abstract:
<p>The original article is available at www.sciencedirect.com</p>
<p>INTRODUCTION: Identification of a suitable treatment for osteochondral repair presents a major challenge due to existing limitations and an urgent clinical need remains for an off-the-shelf, low cost, one-step approach. A biomimetic approach, where the biomaterial itself encourages cellular infiltration from the underlying bone marrow and provides physical and chemical cues to direct these cells to regenerate the damaged tissue, provides a potential solution. To meet this need, a multi-layer collagen-based osteochondral defect repair scaffold has been developed in our group.</p> <p>AIM: The objective of this study was to assess the in vivo response to this scaffold and determine its ability to direct regenerative responses in each layer in order to repair osteochondral tissue in a critical-sized defect in a rabbit knee.</p> <p>METHODS: Multi-layer scaffolds, consisting ...
https://epubs.rcsi.ie/anatart/94
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Repair of large osteochondritis dissecans lesions using a novel multilayered tissue engineered construct in an equine athlete.
(2016)
Stack, J David; Levingstone, Tanya J; Lalor, William; Sanders, Ruth; Kearney, Clodagh; ...
Repair of large osteochondritis dissecans lesions using a novel multilayered tissue engineered construct in an equine athlete.
(2016)
Stack, J David; Levingstone, Tanya J; Lalor, William; Sanders, Ruth; Kearney, Clodagh; O'Brien, Fergal; David, Florent
Abstract:
<p><strong><em>"This is the pre-peer reviewed version of the following article: Stack JD, Levingstone TJ, Lalor W, Sanders R, Kearney C, O'Brien FJ, David F. Repair of large osteochondritis dissecans lesions using a novel multilayered tissue engineered construct in an equine athlete. Journal of Tissue Engineering and Regenerative Medicine. 2017;11(10)2785-2795.</em></strong> <strong><em>which has been published in final form at </em></strong>DOI: <a href="https://dx.doi.org/10.1002/term.2173">10.1002/term.2173</a> <strong><em>This article may be used for non-commercial purposes in accordance with</em></strong><strong><em> </em></strong><strong><em><a href="http://olabout.wiley.com/WileyCDA/Section/id-828039.html#terms">Wiley Terms and Conditions for Self-Archiving</a>."</em></strong></p>
<...
https://epubs.rcsi.ie/anatart/95
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Scaffold-based delivery of nucleic acid therapeutics for enhanced bone and cartilage repair
(2019)
Kelly, Domhnall C.; Raftery, Rosanne M.; Curtin, Caroline M.; O'Driscoll, Caitríon...
Scaffold-based delivery of nucleic acid therapeutics for enhanced bone and cartilage repair
(2019)
Kelly, Domhnall C.; Raftery, Rosanne M.; Curtin, Caroline M.; O'Driscoll, Caitríona M.; O'Brien, Fergal J.
Abstract:
Recent advances in tissue engineering have made progress toward the development of biomaterials capable of the delivery of growth factors, such as bone morphogenetic proteins, in order to promote enhanced tissue repair. However, controlling the release of these growth factors on demand and within the desired localized area is a significant challenge and the associated high costs and side effects of uncontrolled delivery have proven increasingly problematic in clinical orthopedics. Gene therapy may be a valuable tool to avoid the limitations of local delivery of growth factors. Following a series of setbacks in the 1990s, the field of gene therapy is now seeing improvements in safety and efficacy resulting in substantial clinical progress and a resurgence in confidence. Biomaterial scaffold‐mediated gene therapy provides a template for cell infiltration and tissue formation while promoting transfection of cells to engineer therapeutic proteins in a sustained but ultimately transient ...
http://hdl.handle.net/10468/8408
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Strategies for Articular Cartilage Repair; Mesenchymal Stem Cell-Based Targeting of the Joint Niche
(2015)
Ansboro, Sharon
Strategies for Articular Cartilage Repair; Mesenchymal Stem Cell-Based Targeting of the Joint Niche
(2015)
Ansboro, Sharon
Abstract:
Osteoarthritis (OA) is a degenerative disease characterized by loss of articular cartilage, synovial inflammation and bone remodelling. Due to the low cellularity and avascular nature of articular cartilage it does not spontaneously repair. Mesenchymal stem cells (MSCs) are a potential therapeutic for cartilage regeneration, with delivery of MSCs shown to slow the progression of cartilage degradation. Yet our understanding of the mechanism of action remains unclear. Further to this, loss of transplanted cells from the desired site remains a key biological obstacle. It is now recognised that the synovial joint environment contains tissue-specific progenitor cells, activation of which would signify an additional treatment approach by initiating an endogenous repair programme. Given that biomaterials, such as microspheres have been used as model delivery system to enhance MSC differentiation and also recruit endogenous cells for repair, the first aim was to investigate the use of Hya...
http://hdl.handle.net/10379/5018
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Strategies for improved targeting of therapeutic cells: implications for tissue repair
(2018)
Ansboro, S; ,; Greiser, U; Barry, F; Murphy, M
Strategies for improved targeting of therapeutic cells: implications for tissue repair
(2018)
Ansboro, S; ,; Greiser, U; Barry, F; Murphy, M
Abstract:
Multipotent mesenchymal stem cells (MSCs) have been suggested as a suitable cell source for cell-based treatments for diseases such as osteoarthritis due to their ability to differentiate towards chondrogenic and osteogenic lineages. MSCs can be obtained from a variety of tissue sources, are scalable for mass-production and immuno-privileged enabling their use for allogeneic cell therapy. However, recent pre-clinical studies and clinical trials point to the necessity of increasing engraftment and efficacy of MSCs. This review explores how cell surface modification of the cells can improve homing of MSCs and summarises the use of nanoparticles to enable gene delivery by stem cells as well as facilitate in vivo imaging. The use of advanced biomaterials and how they can be applied to reduce the overall dose of MSCs during therapeutic interventions while achieving optimal targeting efficiency of cells to the diseased sites are addressed. Particular attention is paid to methods that impr...
http://hdl.handle.net/10379/10259
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The anatomical basis for a novel classification of osteoarthritis and allied disorders
(2018)
McGonagle, Dennis; Tan, Ai Lyn; Carey, John; Benjamin, Michael
The anatomical basis for a novel classification of osteoarthritis and allied disorders
(2018)
McGonagle, Dennis; Tan, Ai Lyn; Carey, John; Benjamin, Michael
Abstract:
Osteoarthritis (OA) has historically been classified as 'primary' where no discernible cause was evident and 'secondary' where a triggering factor was apparent. Irrespective of the triggering events, late-stage OA is usually characterized by articular cartilage attrition and consequently the anatomical basis for disease has been viewed in terms of cartilage. However, the widespread application of magnetic resonance imaging in early OA has confirmed several different anatomical abnormalities within diseased joints. A key observation has been that several types of primary or idiopathic OA show ligament-related pathology at the time of clinical presentation, so these categories of disease are no longer idiopathic - at least from the anatomical perspective. There is also ample evidence for OA initiation in other structures including menisci and bones in addition to articular cartilage. Therefore, a new classification for OA is proposed, which is based on the anatomic...
http://hdl.handle.net/10379/12789
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The benefits and limitations of animal models for translational research in cartilage repair.
(2016)
Moran, Conor J; Ramesh, Ashwanth; Brama, Pieter AJ; O'Byrne, John M; O'Brien,...
The benefits and limitations of animal models for translational research in cartilage repair.
(2016)
Moran, Conor J; Ramesh, Ashwanth; Brama, Pieter AJ; O'Byrne, John M; O'Brien, Fergal J; Levingstone, Tanya J
Abstract:
<p>This article is also available at <a href="https://jeo-esska.springeropen.com/articles/10.1186/s40634-015-0037-x">https://jeo-esska.springeropen.com/articles/10.1186/s40634-015-0037-x</a></p>
<p>Much research is currently ongoing into new therapies for cartilage defect repair with new biomaterials frequently appearing which purport to have significant regenerative capacity. These biomaterials may be classified as medical devices, and as such must undergo rigorous testing before they are implanted in humans. A large part of this testing involves in vitro trials and biomechanical testing. However, in order to bridge the gap between the lab and the clinic, in vivo preclinical trials are required, and usually demanded by regulatory approval bodies. This review examines the in vivo models in current use for cartilage defect repair testing and the relevance of each in the context of generated results and applicability to bringing the device ...
https://epubs.rcsi.ie/anatart/91
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The development of novel collagen-glycosaminoglycan scaffold for in vitro mesenchymal stem cell chondrogenesis
(2012)
Matsiko, Amos
The development of novel collagen-glycosaminoglycan scaffold for in vitro mesenchymal stem cell chondrogenesis
(2012)
Matsiko, Amos
Abstract:
<p>Articular cartilage is an incredibly tough tissue owing to its ability to withstand repetitive compressive stress throughout an individual’s lifetime. Conversely, its single greatest limitation is the inability to heal even the most minor injuries (Newman, 1998). Due to the absence of a blood supply, articular cartilage responds to damage poorly (Nelson et al., 2010; Bora et al., 1987). Consequently, this predisposes the joint to articular cartilage degeneration. The repair of damaged tissue using conventional therapies and approaches has been elusive thus far. However, the use of tissue engineered biomaterials has shown promise in cartilage defect repair.In this context, the aim of this thesis was to develop a collagen-glycosaminoglycan (CG) scaffold with optimised intrinsic physico-chemical properties that might induce mesenchymal stem cell (MSC) differentiation towards a chondrogenic lineage in vitro. In addition, the effect of environmental factors such as oxygen tensio...
https://epubs.rcsi.ie/phdtheses/77
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The Effect of Group Composition and Mineral Supplementation during Rearing on Measures of Cartilage Condition and Bone Mineral Density in Replacement Gilts
(2020)
Hartnett, Phoebe; Boyle, Laura; Younge, Bridget; O'Driscoll, Keelin
The Effect of Group Composition and Mineral Supplementation during Rearing on Measures of Cartilage Condition and Bone Mineral Density in Replacement Gilts
(2020)
Hartnett, Phoebe; Boyle, Laura; Younge, Bridget; O'Driscoll, Keelin
Abstract:
Lameness is a major cause of poor longevity and poor welfare in replacement gilts. The problem is exacerbated by inappropriate housing and diet during the rearing period. Replacement gilts are often reared with male finisher pigs destined for slaughter. If they are not castrated, they perform high levels of potentially injurious sexual and aggressive behaviour. Furthermore, finisher pig diets are not designed to meet the needs of developing gilts and may not supply the necessary minerals to support good limb health. The objective of this study was to evaluate the effect of supplementing the diet of replacement gilts with copper, zinc and manganese and separating them from males during the rearing period on locomotory ability, bone mineral density and cartilage lesion scores. A 2 × 2 factorial design experiment investigated the effect of female-only or mixed-sex rearing, with or without supplementary minerals (Copper, Zinc and Manganese). In total, 384 maternal line gilts were assign...
http://hdl.handle.net/11019/1977
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