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Displaying Results 1 - 25 of 80 on page 1 of 4
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2-(3-Chlorophenyl)-1-ferrocenylmethyl-1H-1,3-benzimidazole: an electroactive agent for anion sensor and malarial parasite studies
(2001)
Gallagher, John F.; Hanlon, Keith; Howarth, Joshua; Thomas, Jean-Luc
2-(3-Chlorophenyl)-1-ferrocenylmethyl-1H-1,3-benzimidazole: an electroactive agent for anion sensor and malarial parasite studies
(2001)
Gallagher, John F.; Hanlon, Keith; Howarth, Joshua; Thomas, Jean-Luc
Abstract:
The title compound, [Fe(C₅H₅)(C₁₉H₁₄ClN₂)], a model electroactive agent for anion sensor and malarial parasite studies, has Fe-C bond lengths in the range 2.020 (3)-2.0543 (18) Å. The Fe...Cg distances (Cg indicates a ring centroid) are essentially similar, with values of 1.6467 (10) and 1.6487 (11) Å for the substituted and unsubstituted cyclopentadienyl rings, respectively, with a linear Cg...Fe...Cg angle of 179.12 (7)°. The Fe-CCp-Csp³ angle is 128.43 (13)° and the Fe1-CCp-Csp³-NBz torsion angle 110.27 (17)° (Cp is cyclopentadienyl and Bz is benzimidazole). Weak C-H...Cl contacts form the only intermolecular interactions of significance.
http://doras.dcu.ie/156/
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A methylcellulose and collagen based temperature responsive hydrogel promotes encapsulated stem cell viability and proliferation in vitro
(2018)
Payne, Christina; Dolan, Eimear B.; O’Sullivan, Janice; Cryan, Sally-Ann; Kelly, Helena M.
A methylcellulose and collagen based temperature responsive hydrogel promotes encapsulated stem cell viability and proliferation in vitro
(2018)
Payne, Christina; Dolan, Eimear B.; O’Sullivan, Janice; Cryan, Sally-Ann; Kelly, Helena M.
Abstract:
With the number of stem cell-based therapies emerging on the increase, the need for novel and efficient delivery technologies to enable therapies to remain in damaged tissue and exert their therapeutic benefit for extended periods, has become a key requirement for their translation. Hydrogels, and in particular, thermoresponsive hydrogels, have the potential to act as such delivery systems. Thermoresponsive hydrogels, which are polymer solutions that transform into a gel upon a temperature increase, have a number of applications in the biomedical field due to their tendency to maintain a liquid state at room temperature, thereby enabling minimally invasive administration and a subsequent ability to form a robust gel upon heating to physiological temperature. However, various hurdles must be overcome to increase the clinical translation of hydrogels as a stem cell delivery system, with barriers including their low tensile strength and their inadequate support of cell viability and at...
http://hdl.handle.net/10379/13431
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A narrative exploration into the experiences of mothers living with HIV in Ireland.
(2014)
Proudfoot, Denise
A narrative exploration into the experiences of mothers living with HIV in Ireland.
(2014)
Proudfoot, Denise
Abstract:
Mothers living with HIV (MLH) are the focus of this narrative study. HIV is increasingly seen as a chronic illness because of medical advances in its treatment. Much research with HIV positive mothers is situated within the dominant biomedical discourse focusing more on outcome rather than experience and, while valuable, it fails to provide insight into their subjective experiences. In Ireland, women represent a third of the newly diagnosed HIV population (O’Donnell, Moran and Igoe 2013), many of whom have children, and migrant African-origin women represent a significant percentage of these new diagnoses. However, no research has examined contemporary maternal HIV experiences within an Irish context. This is an important fact considering the changing nature of HIV and that most HIV positive women are prescribed Highly active antiretroviral treatment (HAART) during their pregnancies and so give birth to HIV negative babies. This study explores the HIV maternal experience as the psyc...
http://doras.dcu.ie/20654/
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A remote access CT colonography training system
(2007)
Luauté, Vincent
A remote access CT colonography training system
(2007)
Luauté, Vincent
Abstract:
Computed tomography colonography (CTC) is emerging as an alternative to conventional colonoscopy (CC). However CTC is not yet in widespread use due in part to the lack of suitably trained radiologists. We have developed a novel remote access system to train radiologists for colorectal cancer screening using CTC. To ensure that radiologists can gain the relevant experience without the need for any specialist equipment or software, we opted for designing a system that is accessible via the Internet using a standard browser. The interface lets the user locate and characterise polyps with the help of appropriate tools such as windowing, polyp measurement, zooming and a 3-D view. Each user has an account in order to allow monitoring of their training. They can also run an automatic evaluation of their work based on gold standard information previously gathered from specialists. This thesis also describes an initial implementation exclusively made up of Java Servlets. The evaluation of th...
http://doras.dcu.ie/89/
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A study of symptom profile and clinical subtypes of delirium
(2012)
Meagher, David
A study of symptom profile and clinical subtypes of delirium
(2012)
Meagher, David
Abstract:
Delineating delirium phenomenology facilitates detection, understanding neuroanatomical endophenotypes, and patient management. This compendium reflects an integrated research plan executed over a five year period, employing detailed, standardized phenomenological assessments cross-sectionally and longitudinally. Motor activity studies were controlled and included both subjective and objective measures, aimed at identifying a new approach to defining this clinical subtype as a more pure motor disturbance. This work confirms delirium as a complex neuropsychiatric disorder involving widespread dysfunction of higher cortical centres that includes core disturbances of cognition, higher level thinking and circadian rhythms. Although delirium is characterised as a unitary syndrome, not all symptoms follow the same trajectory over the course of an episode; non-cognitive symptoms are more fluctuating. Attention is characteristically disproportionately impaired, relatively less fluctuating, ...
http://doras.dcu.ie/16621/
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Acoustic radiation force impulse imaging for aneurysms
(2009)
Tierney, Áine P.; Dumont, Douglas; Callanan, Anthony; McGloughlin, Timothy M.
Acoustic radiation force impulse imaging for aneurysms
(2009)
Tierney, Áine P.; Dumont, Douglas; Callanan, Anthony; McGloughlin, Timothy M.
Abstract:
A method for reliable, noninvasive estimation of Abdominal Aortic Aneurysms (AAA) wall mechanics may be a useful clinical tool for rupture prediction. An in vitro AAA model was developed from an excised porcine aorta, with elastase treatment. The AAA model behaviour was analysed using Acoustic Radiation Force Impulse (ARFI) imaging techniques to generate displacements in both aneurysmal and normal aortic tissue. The incremental modulus of the arteries was indicative of early collagen recruitment, typical in aneurysms due to elastin degradation. Opening angle measurement showed a four fold decrease from healthy aorta to AAA model. The mechanical changes that occur during aneurysm formation were found to be detectable using ARFI imaging.
http://hdl.handle.net/10344/2556
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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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Adolescents' embodied experiences of living with chronic kidney disease
(2020)
O Neill, Colleen
Adolescents' embodied experiences of living with chronic kidney disease
(2020)
O Neill, Colleen
Abstract:
Introduction: Chronic Kidney Disease (CKD) is an enduring and debilitating condition which can have significant physical, psychological and social consequences for anyone experiencing this disease. Navigating CKD in adolescence is particularly challenging; young people are simultaneously inhabiting bodies that are transforming through pubertal processes as well as trying to manage bodies that have been greatly changed by both disease and medical technologies. Inevitably, managing these processes of unpredictable body alteration has a profound influence on how adolescents experience, perceive and use their bodies in the world. However, there is limited research that examines the embodied experiences and perspectives of adolescents living with CKD. The aim of this study is to explore adolescents’ embodied experiences of living with chronic kidney disease Methods: This study employs a narrative inquiry research design incorporating arts-based methodology. Data were gathered using vis...
http://doras.dcu.ie/24984/
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An atypical and functionally diverse family of Kunitz-type cysteine/serine proteinase inhibitors secreted by the helminth parasite Fasciola hepatica.
(2020)
Smith, David; Cwiklinski, Krystyna; Jewhurst, Heather; Tikhonova, Irina G.; Dalton, Joh...
An atypical and functionally diverse family of Kunitz-type cysteine/serine proteinase inhibitors secreted by the helminth parasite Fasciola hepatica.
(2020)
Smith, David; Cwiklinski, Krystyna; Jewhurst, Heather; Tikhonova, Irina G.; Dalton, John P.
Abstract:
Fasciola hepatica is a global parasite of humans and their livestock. Regulation of parasite-secreted cathepsin L-like cysteine proteases associated with virulence is important to fine-tune parasite-host interaction. We uncovered a family of seven Kunitz-type (FhKT) inhibitors dispersed into five phylogenetic groups. The most highly expressed FhKT genes (group FhKT1) are secreted by the newly excysted juveniles (NEJs), the stage responsible for host infection. The FhKT1 inhibitors do not inhibit serine proteases but are potent inhibitors of parasite cathepsins L and host lysosomal cathepsin L, S and K cysteine proteases (inhibition constants¿
DS is funded by a Department for Employment and Learning (DEL), Northern Ireland grant. KC and JPD are funded by a European Research Council Advanced Grant (HELIVAC, 322725) and Science Foundation Ireland (SFI) Professorship grant (17/RP/5368). HJ, KC and JPD are members of the Horizon 2020-funded Consortium PARAGONE.
http://hdl.handle.net/10379/16350
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Anisamide-targeted gold nanoparticles for siRNA delivery in prostate cancer - synthesis, physicochemical characterisation and in vitro evaluation
(2016)
Fitzgerald, Kathleen A.; Rahme, Kamil; Guo, Jianfeng; Holmes, Justin D.; O'Driscol...
Anisamide-targeted gold nanoparticles for siRNA delivery in prostate cancer - synthesis, physicochemical characterisation and in vitro evaluation
(2016)
Fitzgerald, Kathleen A.; Rahme, Kamil; Guo, Jianfeng; Holmes, Justin D.; O'Driscoll, Caitríona M.
Abstract:
Metastatic prostate cancer is a leading cause of cancer-related death in men and current chemotherapies are largely inadequate in terms of efficacy and toxicity. Hence improved treatments are required. The application of siRNA as a cancer therapeutic holds great promise. However, translation of siRNA into the clinic is dependent on the availability of an effective delivery system. Gold nanoparticles (AuNPs) are known to be effective and non-toxic siRNA delivery agents. In this study, a stable gold nanosphere coated with poly(ethylenimine) (PEI) was prepared to yield PEI capped AuNPs (Au-PEI). The PEI was further conjugated with the targeting ligand anisamide (AA, is known to bind to the sigma receptor overexpressed on the surface of prostate cancer cells) to produce an anisamide-targeted nanoparticle (Au-PEI-AA). The resulting untargeted and targeted nanoparticles (Au-PEI and Au-PEI-AA respectively) were positively charged and efficiently complexed siRNA. Au-PEI-AA mediated siRNA up...
http://hdl.handle.net/10468/5286
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Ap1s3 mutations cause skin autoinflammation by disrupting keratinocyte autophagy and up-regulating il-36 production
(2018)
Mahil, Satveer K.; Twelves, Sophie; Farkas, Katalin; Setta-Kaffetzi, Niovi; Burden, A. ...
Ap1s3 mutations cause skin autoinflammation by disrupting keratinocyte autophagy and up-regulating il-36 production
(2018)
Mahil, Satveer K.; Twelves, Sophie; Farkas, Katalin; Setta-Kaffetzi, Niovi; Burden, A. David; Gach, Joanna E.; Irvine, Alan D.; Képíró, László; Mockenhaupt, Maja; Oon, Hazel H.; Pinner, Jason; Ranki, Annamari; Seyger, Marieke M.B.; Soler-Palacin, Pere; Storan, Eoin R.; Tan, Eugene S.; Valeyrie-Allanore, Laurence; Young, Helen S.; Trembath, Richard C.; Choon, Siew-Eng
Abstract:
Prominent skin involvement is a defining characteristic of autoinflammatory disorders caused by abnormal IL-1 signaling. However, the pathways and cell types that drive cutaneous autoinflammatory features remain poorly understood. We sought to address this issue by investigating the pathogenesis of pustular psoriasis, a model of autoinflammatory disorders with predominant cutaneous manifestations. We specifically characterized the impact of mutations affecting AP1S3, a disease gene previously identified by our group and validated here in a newly ascertained patient resource. We first showed that AP1S3 expression is distinctively elevated in keratinocytes. Because AP1S3 encodes a protein implicated in autophagosome formation, we next investigated the effects of gene silencing on this pathway. We found that AP1S3 knockout disrupts keratinocyte autophagy, causing abnormal accumulation of p62, an adaptor protein mediating NF-kappa B activation. We showed that as a consequence, AP1S3-def...
http://hdl.handle.net/10379/12592
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Applications of fluorescent biosensors for non-invasive glucose monitoring
(2016)
Bruen, Danielle; Delaney, Colm; Florea, Larisa; Diamond, Dermot
Applications of fluorescent biosensors for non-invasive glucose monitoring
(2016)
Bruen, Danielle; Delaney, Colm; Florea, Larisa; Diamond, Dermot
Abstract:
Diabetes is a widespread disease, whereby the body is incapable of regulating the metabolism of glucose1. As a result, this disorder leads to severe health effects such as blindness, kidney failure and stroke1-2, where monitoring glucose has proven to prevent some of these undesired side effects. Current monitoring methods for diabetes are either invasive or non-continuous, where Brooks et al have introduced contact lenses, on the cover of ACS Nanomaterials, as a sensing platform for noninvasive monitoring1. This highlights the need for a non-invasive, continuous glucose-monitoring device for personal use1. Lewis acidic boronic acids (BAs) are widely known for their strong but reversible interactions with diol-containing compounds like glucose1. This phenomenon has lead to the development and evolution of many fluorescent boronic acid derivatives, where the BA-sugar interaction can be monitored by changes in fluorescence1. In our group, a range of boronic acid derivatives have been ...
http://doras.dcu.ie/21264/
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Automated on-disc total RNA extraction from whole blood towards point-of-care for early-stage diagnostics
(2013)
Dimov, Nikolay; Gaughran, Jennifer; Clancy, Eoin; Barry, Thomas; Smith, J. Terry; Ducré...
Automated on-disc total RNA extraction from whole blood towards point-of-care for early-stage diagnostics
(2013)
Dimov, Nikolay; Gaughran, Jennifer; Clancy, Eoin; Barry, Thomas; Smith, J. Terry; Ducrée, Jens
Abstract:
We present a novel integrated, centrifugo-pneumatic micro-homogenizer (“μHomogenizer”) for automated sample preparation and total RNA extraction from whole blood. Using a Trizol based protocol, this novel μHomogenizer efficiently lyses whole blood spiked with E. coli, retains the organic-mixed fraction and yields the aqueous phase with the total RNA content. By the interplay of microfluidic design and a protocol of rotational frequencies, we concatenate (and parallelize) a sequence of five subsequent liquid handling operations that complete in less than 10 minutes. A comparison of the total nucleotide content yields similar performance as conventional, essentially manual off-disc sample preparation methods.
http://doras.dcu.ie/19031/
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Book review: South Africa pushed to the limit by Hein Marais
(2011)
Sheehan, Helena
Book review: South Africa pushed to the limit by Hein Marais
(2011)
Sheehan, Helena
http://doras.dcu.ie/16846/
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Boronic acid derivatives for sugar sensing
(2015)
Bruen, Danielle; Florea, Larisa; Diamond, Dermot
Boronic acid derivatives for sugar sensing
(2015)
Bruen, Danielle; Florea, Larisa; Diamond, Dermot
Abstract:
Several boronic acid (BA) derivatives, suitable for sugar sensing (see Figure), have been synthesised via a one-step nucleophilic substitution reaction from the appropriate quinoline starting materials and the benzylboronic acid derivative1. The quinoline moiety confers the fluorescent behaviour of these sensors through its associated conjugated framework. The BA moiety of the sensor is known for its strong interaction with diols and hence, the sugar sensing application1,2. On interacting with sugars (e.g. glucose, fructose and lactose) the fluorescence emission decreases with increasing sugar concentration1. The BA sensors reported previously in the literature (compounds 1, 2, 5 and 6, see Figure), have been found to be suitable for glucose sensing, in the ocular aqueous humour, in which the glucose range for a healthy person is 300-800 μM, increasing to 200-4000 μM for people with diabetes1. As a result, BA sensors have been investigated for glucose sensing when incorporated into ...
http://doras.dcu.ie/20707/
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Brain injury in the international multicenter randomized SafeBoosC phase II feasibility trial: cranial ultrasound and magnetic resonance imaging assessments
(2016)
Plomgaard, Anne M.; Hagmann, Cornelia; Alderliesten, Thomas; Austin, Topun; van Bel, Fr...
Brain injury in the international multicenter randomized SafeBoosC phase II feasibility trial: cranial ultrasound and magnetic resonance imaging assessments
(2016)
Plomgaard, Anne M.; Hagmann, Cornelia; Alderliesten, Thomas; Austin, Topun; van Bel, Frank; Claris, Olivier; Dempsey, Eugene M.; Franz, Axel; Fumagalli, Monica; Gluud, Christian; Greisen, Gorm; Hyttel-Sorensen, Simon; Lemmers, Petra; Pellicer, Adelina; Pichler, Gerhard; Benders, Manon
Abstract:
BACKGROUND: Abnormal cerebral perfusion during the first days of life in preterm infants is associated with higher grades of intraventricular hemorrhages and lower developmental score. In SafeBoosC II, we obtained a significant reduction of cerebral hypoxia by monitoring cerebral oxygenation in combination with a treatment guideline. Here, we describe (i) difference in brain injury between groups, (ii) feasibility of serial cranial ultrasound (cUS) and magnetic resonance imaging (MRI), (iii) local and central cUS assessment. METHODS: Hundred and sixty-six extremely preterm infants were included. cUS was scheduled for day 1, 4, 7, 14, and 35 and at term-equivalent age (TEA). cUS was assessed locally (unblinded) and centrally (blinded). MRI at TEA was assessed centrally (blinded). Brain injury classification: no, mild/moderate, or severe. RESULTS: Severe brain injury did not differ significantly between groups: cUS (experimental 10/80, control 18/77, P = 0.32) and MRI (5/46 vs. 3/38, ...
http://hdl.handle.net/10468/4599
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Cardiorespiratory fitness, physical activity, sedentary behaviour and vascular health in male adolescents
(2016)
Sheridan, Sinead
Cardiorespiratory fitness, physical activity, sedentary behaviour and vascular health in male adolescents
(2016)
Sheridan, Sinead
Abstract:
Study 1: A high cardiorespiratory fitness (CRF) level is positively associated with a more favorable cardiometabolic health profile in adolescents. Limited information exists on the relation between CRF and vascular health in healthy adolescents. The purpose of this study was to compare cardiovascular disease (CVD) risk factors and vascular health in healthy low fit (LF), moderate fit (MF) and high fit (HF) male adolescents. LF male adolescents had significantly poorer endothelial dependent dilation (EDD) and cardiovascular health profile and significantly higher carotid intima media thickness (cIMT) compared to both MF and LF. There was a significant positive relation between V̇O2max and EDD and a significant inverse association between V̇O2max and cIMT in healthy male adolescents. Study 2: The oxygen uptake efficiency slope (OUES) has been proposed as an objective and effort independent submaximal measure of CRF and may serve as an alternative to V̇O2max when assessing CRF in ...
http://doras.dcu.ie/21125/
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CD4 cell isolation from blood using finger-actuated on-chip magnetophoresis for rapid HIV/AIDS diagnostics
(2014)
Glynn, Macdara; Kinahan, David J.; Chung, Danielle; Ducrée, Jens
CD4 cell isolation from blood using finger-actuated on-chip magnetophoresis for rapid HIV/AIDS diagnostics
(2014)
Glynn, Macdara; Kinahan, David J.; Chung, Danielle; Ducrée, Jens
Abstract:
With timely diagnosis and correct treatment, people living with HIV/AIDS can consider the disease as a chronic rather than a terminal illness. Still, in regions were HIV is endemic, rapid diagnosis is a challenge due to the complexity of the instrumentation required, the poor infrastructure in these countries, as well as the technical expertise required to carry out the diagnosis. This paper presents a microfluidic chip based approach allowing semi-quantitative CD4+ cell coun¬ting on a cheap, rapid, highly portable and instrumentation-free Point-of-Care HIV diagnostic device. Flow is driven by finger-pressing a flexible reservoir, and the target cells are immobilized through magnetophoresis. The fluidic test completes within ca. 30 seconds of sample application to the chip.
http://doras.dcu.ie/19800/
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Characterisation of resident multipotent vascular stem cell derived smooth muscle cells in culture
(2015)
Kennedy, Eimear
Characterisation of resident multipotent vascular stem cell derived smooth muscle cells in culture
(2015)
Kennedy, Eimear
Abstract:
The origin of the vascular Smooth Muscle Cell (SMC) involved with vascular remodelling is very controversial. The theory that SMCs can dedifferentiate is long standing. However, in more recent years this idea has been challenged with the emergence of resident progenitor stem cells in the vascular wall. Here, a population of primary Multipotent Vascular Stem Cells (MVSCs) were isolated using explant culture from the medial layer of rat aortic tissue. MVSCs were characterised for multipotency based on expression of neural crest markers Sox10, Sox17 and glia cell marker S100β. The cells were also characterised for their mesenchymal stem cell (MSC) like properties through their ability to differentiate into adipocytes and osteocytes and expression of markers CD44 and CD29. In maintenance media, the cells displayed a SMA+/CNN+/SM-MHCII- phenotype. After TGFβ1 and PDGF-BB stimulation the cells presented a SMA+/CNN+/SM-MHCII+ phenotype demonstrating their transition to SMCs. A10 and A7r5 c...
http://doras.dcu.ie/20424/
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Co-design and user validation of a technology-enabled behaviour change intervention for individuals with cardiovascular disease: Preliminary findings
(2016)
Woods, Catherine; Walsh, Deirdre; Duff, Orlaith; Claes, Jomme; Buys, Roselien; Cornelis...
Co-design and user validation of a technology-enabled behaviour change intervention for individuals with cardiovascular disease: Preliminary findings
(2016)
Woods, Catherine; Walsh, Deirdre; Duff, Orlaith; Claes, Jomme; Buys, Roselien; Cornelissen, Véronique; Gallagher, Anne; Newton, Helen; McCaffrey, Noel; Casserly, Ivan; McAdam, Brendan; Moran, Kieran
Abstract:
Purpose: Cardiovascular disease (CVD) is the leading cause of premature death and disability in Europe. Effective exercise-based cardiac rehabilitation (CR) can improve mortality and morbidity rates, yet uptake of community-based CR is low (1). PATHway (Physical Activity Towards Health) is a technology-enabled lifestyle behaviour change intervention designed to enhance patient self-management of CVD through adherence to physical activity and other health behaviours. This paper explains the co-design and user validation process that is being employed for the development of the PATHway platform. Methods: CVD patients from a) hospital-based CR and b) community-based CR across two sites (Dublin, Ireland; Leuven, Belgium) are invited to participate in the study. To facilitate an iterative process, three separate rounds of semi-structured interviews, a total of twelve focus groups (4 groups x 3 rounds) are planned between February and April 2016. In round one interviews, participan...
http://doras.dcu.ie/21660/
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Co-design and user validation of the MedFit App: A focus group analysis
(2017)
Duff, Orlaith; Walsh, Deirdre; Furlong, Bróna; O'Connor, Noel E.; Moran, Kieran; W...
Co-design and user validation of the MedFit App: A focus group analysis
(2017)
Duff, Orlaith; Walsh, Deirdre; Furlong, Bróna; O'Connor, Noel E.; Moran, Kieran; Woods, Catherine
Abstract:
Background: This research details the development phase of the formative research process as part of the mHealth Development Evaluation Framework, used to develop a theoretically informed Android App, named MedFit. The overall aim of the app is to increase physical activity minutes of adults with cardiovascular disease (CVD). This research comes under the theme ‘Health and Wellbeing’, creating an alternative mode of cardiac rehabilitation. The focus of this abstract is the co-design and user validation of the MedFit app through focus group testing. Methods: Participants in the focus groups were recruited from the HeartSmart programme in MedEx. MedEx is an exercise rehabilitation programme for people with chronic illness run in Dublin City University (DCU). In total 26 people took part in the groups (65% male; mean age 648.2 years). There were five focus groups lasting approximately 1.5-2 hours in duration, with a max. of six people per group. The script was developed and informed ...
http://doras.dcu.ie/21867/
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Contact lenses for real-time colorimetric sensing of glucose
(2015)
Bruen, Danielle; Albatal, Rami; Florea, Larisa; Diamond, Dermot
Contact lenses for real-time colorimetric sensing of glucose
(2015)
Bruen, Danielle; Albatal, Rami; Florea, Larisa; Diamond, Dermot
Abstract:
Diabetes is a worldwide incurable disease1 known to have acute and chronic health affects2. This disease affects the cardiovascular and peripheral nervous systems, and the kidneys, also known to have fatal side affects1-3, including heart or kidney failure2. Monitoring physiological blood-glucose concentrations is a means of managing diabetes, however few monitoring methods currently exist1-3. ‘Finger-pricking’ is the most common method, although invasive and non-continuous. This method is inefficient because glucose concentrations are measured only at the time of sampling, meaning episodes of hypo- or hyperglycaemia can be missed2, for example while sleeping2. Invasively drawing blood is also an inconvenience to diabetics, due to their rather poor peripheral blood supply. While pricking a finger is quite painless, it requires compliance by affected patients, including children and the elderly3. The use of boronic acids (BAs) for sensing sugars is well-known, as these Lewis acids ha...
http://doras.dcu.ie/20768/
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Dendrigraft poly-L-lysine (d-PLL) coated gold nanoparticles in water for siRNA delivery to prostate cancer cells
(2018)
Rahme, Kamil; Minassian, G.; Ghanem, Esther; Souaid, Eddy; Guo, Jianfeng; O'Drisco...
Dendrigraft poly-L-lysine (d-PLL) coated gold nanoparticles in water for siRNA delivery to prostate cancer cells
(2018)
Rahme, Kamil; Minassian, G.; Ghanem, Esther; Souaid, Eddy; Guo, Jianfeng; O'Driscoll, Catriona M.; Holmes, Justin D.
Abstract:
Herein we describe a simple method for the synthesis of dendrigraft poly-L-lysine (d-PLL) coated different sizes gold nanoparticles in water (AuNPs-d-PLL) as potential to delivery vehicles of siRNA to PC-3 prostate cancer cells. AuNPs-d-PLL with diameters ranging between 50-120 nm have been synthesised in aqueous solutions using d-PLL (7 KD) as a capping ligand, and ascorbic acid as a reducing agent. The size of the resulting AuNPs was found to depend on several parameters (i.e. the concentrations of the gold salt, ascorbic d-PLL and temperature). The obtained AuNPs-d-PLL were characterized using UV-visible spectroscopy (UV-vis), Scanning Electron Microscopy (SEM), and Dynamic Light Scattering (DLS). The ability to PEGylate the AuNPs-d-PLL with SH-PEG-OCH3 and SH-PEG-Folate was demonstrated via DLS and zeta potential mesurements, their capacity to complex siRNA was verified (DLS, gel electrophoresis), and transfer of AuNPs-d-PLL-PEG-FA.siRNA to PC-3 cells was investigated.
http://hdl.handle.net/10468/9332
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Depressive symptoms and perceived general health as factors associated with 12-week attendance to a community based chronic illness rehabilitation programme: MedEx Wellness.
(2016)
O'Leary, Emer; McCaffrey, Noel; Doyle, Frank; Furlong, Bróna; Walsh, Deirdre; Wood...
Depressive symptoms and perceived general health as factors associated with 12-week attendance to a community based chronic illness rehabilitation programme: MedEx Wellness.
(2016)
O'Leary, Emer; McCaffrey, Noel; Doyle, Frank; Furlong, Bróna; Walsh, Deirdre; Woods, Catherine
Abstract:
Purpose: The presence of chronic illness has been consistently associated with depressive symptoms, and both are associated with decreased physical activity. This paper examines how level of depressive symptoms and perceived general health are associated with 12-week attendance at a CBCIR. Methods: Participants with established chronic illnesses referred to Med Ex via GPs and hospitals completed a MedEx questionnaire (Cronbach alpha >0.8 on all instruments) at induction. This instrument assessed perceived general health (1 item), presence of depressive symptoms (8 items), and self-reported days of 30 minutes of moderate to vigorous physical activity (days.30mins.MVPA; 2 items). Subsequently, attendance (defined as a visit to a MedEx class) was objectively monitored for 12 weeks. Results: 156 participants (M age=66.08+11.09, 54% Male) completed induction. 47% were classified as having no depressive symptoms, 30% had mild symptoms, while 23% had moderate, moderate to severe,...
http://doras.dcu.ie/21634/
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Developing an anatomical simulator for early stage usability testing of endovascular devices
(2016)
O'Sullivan, Kevin Jeremiah
Developing an anatomical simulator for early stage usability testing of endovascular devices
(2016)
O'Sullivan, Kevin Jeremiah
Abstract:
Adverse medical events resulting in serious harm occur in approx. 1-4% of all hospital admissions (Sarker and Vincent 2005). Endovascular devices encompasses a wide range of medical devices designed to treat diseases using a minimally invasive approach. These devices range from coronary stents to full aortic valve replacement and are delivered through the vascular system. Usability engineering is a sub specialty of ergonomics concerned with the development of devices that are fit for use (Kramme et al. 2011). Usability Testing (UT) of medical devices is an integral part of the regulatory requirements for device approval in both the United States and the European Union. UT champions the use of simulated use testing, particularly at the early stage and validation stage of the design process (FDA 2011). Simulated UT is a safe and ethical way of eliciting user needs, testing device prototypes, and validating design solutions in order to reduce the likelihood of an adverse event occurrin...
http://hdl.handle.net/10344/5238
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