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- 2019
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Tidskriftsartikel (refereegranskat)
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- Bermon, Stephane, et al.
(författare)
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Consensus Statement Immunonutrition and Exercise.
- 2017
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Ingår i: Exercise immunology review. - 1077-5552. ; 23, s. 8-50
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Forskningsöversikt (refereegranskat)abstract
- In this consensus statement on immunonutrition and exercise, a panel of knowledgeable contributors from across the globe provides a consensus of updated science, including the background, the aspects for which a consensus actually exists, the controversies and, when possible, suggested directions for future research.
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| 4. |
- Blösch, Günter, et al.
(författare)
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Twenty-three unsolved problems in hydrology (UPH) - a community perspective
- 2019
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Ingår i: Hydrological Sciences Journal. - : Informa UK Limited. - 0262-6667 .- 2150-3435. ; 64:10, s. 1141-1158
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Tidskriftsartikel (refereegranskat)abstract
- This paper is the outcome of a community initiative to identify major unsolved scientific problems in hydrology motivated by a need for stronger harmonisation of research efforts. The procedure involved a public consultation through online media, followed by two workshops through which a large number of potential science questions were collated, prioritised, and synthesised. In spite of the diversity of the participants (230 scientists in total), the process revealed much about community priorities and the state of our science: a preference for continuity in research questions rather than radical departures or redirections from past and current work. Questions remain focused on the process-based understanding of hydrological variability and causality at all space and time scales. Increased attention to environmental change drives a new emphasis on understanding how change propagates across interfaces within the hydrological system and across disciplinary boundaries. In particular, the expansion of the human footprint raises a new set of questions related to human interactions with nature and water cycle feedbacks in the context of complex water management problems. We hope that this reflection and synthesis of the 23 unsolved problems in hydrology will help guide research efforts for some years to come.
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| 5. |
- Ebrahimi-Fakhari, Darius, et al.
(författare)
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Defining the clinical, molecular and imaging spectrum of adaptor protein complex 4-associated hereditary spastic paraplegia
- 2020
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Ingår i: Brain. - OXFORD ENGLAND : Oxford University Press (OUP). - 0006-8950 .- 1460-2156. ; 143:10, s. 2929-2944
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Tidskriftsartikel (refereegranskat)abstract
- Bi-allelic loss-of-function variants in genes that encode subunits of the adaptor protein complex 4 (AP-4) lead to prototypical yet poorly understood forms of childhood-onset and complex hereditary spastic paraplegia: SPG47 (AP4B1), SPG50 (AP4M1), SPG51 (AP4E1) and SPG52 (AP4S1). Here, we report a detailed cross-sectional analysis of clinical, imaging and molecular data of 156 patients from 101 families. Enrolled patients were of diverse ethnic backgrounds and covered a wide age range (1.0-49.3 years). While the mean age at symptom onset was 0.8 +/- 0.6 years [standard deviation (SD), range 0.2-5.0], the mean age at diagnosis was 10.2 +/- 8.5 years (SD, range 0.1-46.3). We define a set of core features: early-onset developmental delay with delayed motor milestones and significant speech delay (50% non-verbal); intellectual disability in the moderate to severe range; mild hypotonia in infancy followed by spastic diplegia (mean age: 8.4 +/- 5.1 years, SD) and later tetraplegia (mean age: 16.1 +/- 9.8 years, SD); postnatal microcephaly (83%); foot deformities (69%); and epilepsy (66%) that is intractable in a subset. At last follow-up, 36% ambulated with assistance (mean age: 8.9 +/- 6.4 years, SD) and 54% were wheelchair-dependent (mean age: 13.4 +/- 9.8 years, SD). Episodes of stereotypic laughing, possibly consistent with a pseudobulbar affect, were found in 56% of patients. Key features on neuroimaging include a thin corpus callosum (90%), ventriculomegaly (65%) often with colpocephaly, and periventricular white-matter signal abnormalities (68%). Iron deposition and polymicrogyria were found in a subset of patients. AP4B1-associated SPG47 and AP4M1-associated SPG50 accounted for the majority of cases. About two-thirds of patients were born to consanguineous parents, and 82% carried homozygous variants. Over 70 unique variants were present, the majority of which are frameshift or nonsense mutations. To track disease progression across the age spectrum, we defined the relationship between disease severity as measured by several rating scales and disease duration. We found that the presence of epilepsy, which manifested before the age of 3 years in the majority of patients, was associated with worse motor outcomes. Exploring genotype-phenotype correlations, we found that disease severity and major phenotypes were equally distributed among the four subtypes, establishing that SPG47, SPG50, SPG51 and SPG52 share a common phenotype, an 'AP-4 deficiency syndrome'. By delineating the core clinical, imaging, and molecular features of AP-4-associated hereditary spastic paraplegia across the age spectrum our results will facilitate early diagnosis, enable counselling and anticipatory guidance of affected families and help define endpoints for future interventional trials.
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| 7. |
- Gleeson, Michael, 1971, et al.
(författare)
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The interactions of Na, NO, and H2O on the graphite (0001) surface
- 2003
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Ingår i: Journal of Chemical Physics. - 1089-7690 .- 0021-9606. ; 119:13, s. 6753-6767
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Tidskriftsartikel (refereegranskat)abstract
- The reactions of Na and NO on the (0001) surface of graphite and the influence of coadsorbed water on these reactions have been studied by thermal desorption spectroscopy. The products of the NO+Na reactions are dependent on the partial concentrations in the initial coadsorbed layer. For NO:Na dose ratios less than 1:1, N2 formation is dominant. For higher NO doses, this is superseded by N2O formation. In all cases sodium is oxidized by the NO. This leads to carbonate formation, which subsequently decomposes to release CO2 and CO. The addition of H2O at low coverages to the Na+NO system complicates the reactions. It results in ammonia formation by two independent mechanisms. The formation of NH3 is strongly dependent on the water dose. In addition to generating NH3, coadsorbed water alters the sodium oxidation pathway resulting in an enhanced formation of CO2 at certain coverages. Large H2O coverages block the NO reaction pathways by forming an inert "hypermetalated" hydroxide overlayer. The surface composition of this hydroxide is of the type Na2OH or Na3OH. Decomposition of this overlayer results in the desorption of a significant fraction of stable Na2OH molecules.
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| 8. |
- Hanstock, Helen, 1989-
(författare)
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Tear Secretory IgA: A Noninvasive Biomarker of Mucosal Immune Competence
- 2016
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Since early studies investigated the influence of exercise on salivary secretory IgA(SIgA) in the 1980s, there has been demand for non-invasive biomarkers capableof monitoring the immune response to exercise, training and stress, and provideinsight into whether such stressors may influence susceptibility to URTI. In spiteof >30 years of research and ~200 original articles investigating a multitude ofcandidate markers, this tool remains elusive. Transmission of URTIs has beendemonstrated via the nasal and ocular mucosae, so maintainence of a strong‘first line of defence’ at mucosal surfaces is likely important for host defence. Tearfluid has been recently highlighted as a non-invasive medium for assessment ofhydration status (through determination of tear osmolarity) and blood glucoseconcentrations (via glucose-sensing contact lenses). Prompted by the searchfor viable non-invasive immune biomarkers, this thesis set out to explore thepotential of tear SIgA to assess immune status. First, in a prospective monitoringstudy, we demonstrated that tear SIgA secretion falls ~50% during the weekbefore experiencing upper respiratory symptoms (URS), with a 30% reductionin tear SIgA secretion conferring a six-fold increased chance of experiencing URSin the following week. Next, we undertook three studies to explore the influenceof everyday stressors on tear SIgA secretion. Both a two-hour bout of moderateintensityexercise and two-minutes of acute psychological stress caused animmediate ~50% decrease in tear SIgA concentration. The observations fromthe first study suggest that these reductions are of sufficient magnitude totemporarily compromise host defence, in line with the ‘open window’ theory.Dehydration, on the other hand, did not influence tear SIgA secretion. Thesestudies provide the first experimental evidence that tear SIgA has potentialas a non-invasive marker of mucosal immune competence that is sensitive toeveryday stressors and has utility to assess common cold risk.
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| 10. |
- Schwellnus, Martin, et al.
(författare)
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How much is too much? (Part 2) International Olympic Committee consensus statement on load in sport and risk of illness
- 2016
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Ingår i: British Journal of Sports Medicine. - : BMJ PUBLISHING GROUP. - 0306-3674 .- 1473-0480. ; 50:17, s. 1043-1052
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Tidskriftsartikel (refereegranskat)abstract
- The modern-day athlete participating in elite sports is exposed to high training loads and increasingly saturated competition calendar. Emerging evidence indicates that inappropriate load management is a significant risk factor for acute illness and the overtraining syndrome. The IOC convened an expert group to review the scientific evidence for the relationship of loadincluding rapid changes in training and competition load, competition calendar congestion, psychological load and traveland health outcomes in sport. This paper summarises the results linking load to risk of illness and overtraining in athletes, and provides athletes, coaches and support staff with practical guidelines for appropriate load management to reduce the risk of illness and overtraining in sport. These include guidelines for prescription of training and competition load, as well as for monitoring of training, competition and psychological load, athlete well-being and illness. In the process, urgent research priorities were identified.
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