Publications by authors named "Paul Hyland"

In the public transport industry, travellers' perceived satisfaction is a key element in understanding their evaluation of, and loyalty to ridership. Despite its notable importance, studies of customer satisfaction are under-represented in the literature, and most previous studies are based on survey data collected from a single city only. This does not allow a comparison across different transport systems.

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Background: In 2015, the Tabbot Foundation launched a nationwide direct-to-patient telemedicine service to enable women to obtain medical abortion without visiting an abortion provider.

Aims: We aimed to describe results from the first 18 months of this service.

Materials And Methods: To have an abortion through the Foundation, a woman obtained screening tests locally and had a telephone consultation with a Foundation doctor.

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Background: The research literature has documented age-related increases in genetic damage, including oxidative DNA damage, in human T lymphocytes, in vitro and ex vivo. Such damage has the potential to interfere with the ability of the T cells to proliferate at times when they need to, such as when antigen challenged. The consequence of this could be a sub-optimal immune response in vivo.

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Background: Poly(ADP-ribosyl)ation is a posttranslational modification of nuclear proteins catalysed by poly(ADP-ribose) polymerases (PARPs), using NAD+ as a substrate. Activation of PARP-1 is in immediate response to DNA damage generated by endogenous and exogenous damaging agents. It has been implicated in several crucial cellular processes including DNA repair and maintenance of genomic stability, which are both intimately linked with the ageing process.

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T cells undergo rapid clonal expansion upon antigenic stimulation to produce an effective immune response. Any defect in the DNA mismatch repair (MMR) system may have a detrimental effect on T cell proliferation. This study employed an in vitro model of human CD4+T cell ageing to investigate MMR capacity at various stages of T cell lifespan.

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Oxidative DNA damage has been suggested to contribute to the decline in T cell clone (TCC) function with increased age in vitro. To test this hypothesis the effect of a reduced oxygen tension culture system (6% O(2)) on TCCs was examined. Specifically, the effects of the altered culture conditions on DNA damage levels, in vitro lifespan and proliferative capacity were assessed in five independently derived human CD4+ TCCs.

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DNA damage has been shown to increase with age in lymphocytes of healthy humans and in human CD4+ T cell clones. Such genetic damage, if unrepaired, may have a detrimental effect on lymphocyte-mediated immune responses. This study investigated DNA excision repair capacity of human CD4+ T cell clones as a function of age in vitro.

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Palliative care is a complex environment in which teams of healthcare professionals are constantly challenged to match the configuration of care delivery to suit the dynamics of the patient's bio-medical, social and spiritual situations as they change during the end-of-life process. In such an environment these teams need to engage in ongoing interaction between different professional disciplines, incremental improvement in care delivery, learning and radical innovation. This is aimed at combining operational effectiveness, strategic flexibility, exploitation and exploration, in a way that ensures the best possible care for the patient.

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Polymorphism of the human leukocyte antigen has been implicated in a number of autoimmune disorders including ageing. In the course of the present study, no association of the human leukocyte antigen (HLA)-A1, B8, DR3 haplotype with a male Irish aged population, as previously reported, was observed. Two polymorphic nucleotides in the TNF cluster (G-308A TNF-alpha and G+252A TNF-beta), associated with increased TNF-alpha production, were shown to be in tight linkage disequilibrium with the class I and II HLA loci, generating HLA haplotypes with extended linkage disequilibrium.

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The results of previous work from our laboratories have suggested that free radical damage to T cells as they age may contribute to the age-related decline in the T cell-mediated immune response. The aims of this investigation were to assess the efficiency of in vivo antioxidant capacity through determining the antioxidant capacity of plasma using the ferric reducing ability of plasma assay, and to assess the levels and types of DNA damage (as a measure of in vivo antioxidant efficiency) using the alkaline comet assay and two enzymatic modifications of the comet assay, in peripheral blood mononuclear cells (PBMCs) from nonagenarian subjects drawn from the Swedish NONA Immune Study. The results obtained were compared with those from middle-aged (40-60 years) controls to identify potential anti-immunosenescent effects of in vivo antioxidants.

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An age-related increase of DNA damage/mutation has been previously reported in human lymphocytes. The high copy number and mutation rate make the mtDNA genome an ideal candidate for assessing damage and to act as a potential biomarker of ageing. In the present study, two assays were developed to evaluate the level of mtDNA(4977) and the accumulation of point mutations with age.

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