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https://www.readbyqxmd.com/read/28921655/fast-dynamic-ventilation-mri-of-hyperpolarized-129-xe-using-spiral-imaging
#1
Ozkan Doganay, Tahreema N Matin, Anthony Mcintyre, Brian Burns, Rolf F Schulte, Fergus V Gleeson, Daniel Bulte
PURPOSE: To develop and optimize a rapid dynamic hyperpolarized (129) Xe ventilation (DXeV) MRI protocol and investigate the feasibility of capturing pulmonary signal-time curves in human lungs. THEORY AND METHODS: Spiral k-space trajectories were designed with the number of interleaves Nint  = 1, 2, 4, and 8 corresponding to voxel sizes of 8 mm, 5 mm, 4 mm, and 2.5 mm, respectively, for field of view = 15 cm. DXeV images were acquired from a gas-flow phantom to investigate the ability of Nint  = 1, 2, 4, and 8 to capture signal-time curves...
September 16, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28919059/rates-of-hippocampal-atrophy-and-presence-of-post-mortem-tdp-43-in-patients-with-alzheimer-s-disease-a-longitudinal-retrospective-study
#2
Keith A Josephs, Dennis W Dickson, Nirubol Tosakulwong, Stephen D Weigand, Melissa E Murray, Leonard Petrucelli, Amanda M Liesinger, Matthew L Senjem, Anthony J Spychalla, David S Knopman, Joseph E Parisi, Ronald C Petersen, Clifford R Jack, Jennifer L Whitwell
BACKGROUND: Post-mortem studies have not identified an association between β-amyloid or tau and rates of hippocampal atrophy in patients with Alzheimer's disease. TAR DNA binding protein 43 (TDP-43) is another protein linked to Alzheimer's disease. We aimed to investigate whether hippocampal TDP-43 is associated with increased rates of hippocampal atrophy. METHODS: In this longitudinal retrospective study, we analysed post-mortem brain tissue of all individuals with an Alzheimer's disease spectrum pathological diagnosis who had antemortem head MRI scans between Jan 1, 1999, and Dec 31, 2012, and who had been recruited into the Mayo Clinic Alzheimer's Disease Research Center, Mayo Clinic Alzheimer's Disease Patient Registry, or the Mayo Clinic Study of Aging...
September 11, 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28918207/the-association-between-cardiac-physiology-acquired-brain-injury-and-postnatal-brain-growth-in-critical-congenital-heart-disease
#3
Shabnam Peyvandi, Hosung Kim, Joanne Lau, A James Barkovich, Andrew Campbell, Steven Miller, Duan Xu, Patrick McQuillen
OBJECTIVE: To assess the trajectory of perioperative brain growth in relationship to cardiac diagnosis and acquired brain injuries. METHODS: This was a cohort study of term neonates with hypoplastic left heart syndrome (HLHS) and transposition of the great arteries (TGA). Subjects underwent magnetic resonance imaging of the brain pre- and postoperatively to determine the severity of brain injury and total and regional brain volumes by the use of automated morphometry...
August 24, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28917669/knowledge-driven-computational-modeling-in-alzheimer-s-research-current-state-and-future-trends
#4
Hugo Geerts, Martin Hofmann-Apitius, Thomas J Anastasio
Neurodegenerative diseases such as Alzheimer's disease (AD) follow a slowly progressing dysfunctional trajectory, with a large presymptomatic component and many comorbidities. Using preclinical models and large-scale omics studies ranging from genetics to imaging, a large number of processes that might be involved in AD pathology at different stages and levels have been identified. The sheer number of putative hypotheses makes it almost impossible to estimate their contribution to the clinical outcome and to develop a comprehensive view on the pathological processes driving the clinical phenotype...
September 14, 2017: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/28916632/tissue-sex-and-age-specific-dna-methylation-of-rat-glucocorticoid-receptor-gene-promoter-and-insulin-like-growth-factor-2-imprinting-control-region
#5
Ogechukwu Brenda Agba, Ludwig Lausser, Klaus Huse, Christoph Bergmeier, Niels Jahn, Marco Groth, Martin Bens, Arne Sahm, Maria Gall, Otto W Witte, Hans A Kestler, Matthias Schwab, Matthias Platzer
Tissue-, sex- and age-specific epigenetic modifications such as DNA methylation are largely unknown. Changes in DNA methylation of the glucocorticoid receptor gene (NR3C1) and imprinting control region (ICR) of IGF2 and H19 genes during the lifespan are particularly interesting since these genes are susceptible to epigenetic modifications by prenatal stress or malnutrition. They are important regulators of development and aging. Methylation changes of NR3C1 affect glucocorticoid receptor expression, which is associated with stress sensitivity and stress-related diseases predominantly occurring during aging...
September 15, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/28912923/lack-of-needs-assessment-in-cancer-survivorship-care-and-rehabilitation-in-hospitals-and-primary-care-settings
#6
Charlotte Handberg, Charlotte Maria Jensen, Thomas Maribo
BACKGROUND: Formalized and systematic assessment of survivorship care and rehabilitation needs is prerequisite for ensuring cancer patients sufficient help and support through their cancer trajectory. Patients are often uncertain as to how to express and address their survivorship care and rehabilitation needs, and little is known about specific, unmet needs and the plans necessary to meet them. There is a call for both ensuring survivorship care and rehabilitation for cancer patients in need and further for documenting the specific needs related to the cancer disease and its treatment...
October 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/28910509/the-experience-of-palliative-care-service-provision-for-people-with-non-malignant-respiratory-disease-and-their-family-carers-an-all-ireland-qualitative-study
#7
Clare Mc Veigh, Joanne Reid, Philip Larkin, Sam Porter, Peter Hudson
AIM: To explore specialist and generalist palliative care provision for people with non-malignant respiratory disease, in rural and urban areas in the North and Republic of Ireland. BACKGROUND: Globally, palliative care is recommended as an appropriate healthcare option for people with advanced non- malignant lung disease. Yet, there is limited evidence regarding the integration of palliative care for this client group. DESIGN: Qualitative study...
September 14, 2017: Journal of Advanced Nursing
https://www.readbyqxmd.com/read/28905390/validation-of-the-gatortail-method-for-accurate-sizing-of-pulmonary-vessels-from-3d-medical-images
#8
Walter G O'Dell, Anne K Gormaley, David A Prida
PURPOSE: Detailed characterization of changes in vessel size is crucial for the diagnosis and management of a variety of vascular diseases. Because clinical measurement of vessel size is typically dependent on the radiologist's subjective interpretation of the vessel borders, it is often prone to high inter- and intra-user variability. Automatic methods of vessel sizing have been developed for two-dimensional images but a fully three-dimensional (3D) method suitable for vessel sizing from volumetric X-ray computed tomography (CT) or magnetic resonance imaging has heretofore not been demonstrated and validated robustly...
September 14, 2017: Medical Physics
https://www.readbyqxmd.com/read/28904997/development-of-inflammatory-bowel-disease-is-linked-to-a-longitudinal-restructuring-of-the-gut-metagenome-in-mice
#9
Thomas Sharpton, Svetlana Lyalina, Julie Luong, Joey Pham, Emily M Deal, Courtney Armour, Christopher Gaulke, Shomyseh Sanjabi, Katherine S Pollard
The gut microbiome is linked to inflammatory bowel disease (IBD) severity and altered in late-stage disease. However, it is unclear how gut microbial communities change over the course of IBD development, especially in regard to function. To investigate microbiome-mediated disease mechanisms and discover early biomarkers of IBD, we conducted a longitudinal metagenomic investigation in an established mouse model of IBD, where damped transforming growth factor β (TGF-β) signaling in T cells leads to peripheral immune activation, weight loss, and severe colitis...
September 2017: MSystems
https://www.readbyqxmd.com/read/28899392/care-beyond-the-hospital-ward-understanding-the-socio-medical-trajectory-of-herpes-simplex-virus-encephalitis
#10
Jessie Cooper, Ciara Kierans, Sylviane Defres, Ava Easton, Rachel Kneen, Tom Solomon
BACKGROUND: Herpes simplex virus (HSV) encephalitis is a life-threatening infection of the brain, which has significant physical, cognitive and social consequences for survivors. Despite increasing recognition of the long-term effects of encephalitis, research and policy remains largely focused on its acute management, meaning there is little understanding of the difficulties people face after discharge from acute care. This paper aims to chart the problems and challenges which people encounter when they return home after treatment for HSV encephalitis...
September 12, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28892316/-epidemic-of-measles-in-the-verviers-area-belgium-management-and-precautions-at-the-reception-in-the-emergency-department
#11
A Hebert, O Louis, L Hankenne, P Michel
Measles is a highly contagious viral disease. Transmission occurs from person to person through direct contact or by aerosolization of pharyngeal secretions. In the area of Verviers (Belgium), we were confronted to a group of patients with measles, a public health event with local concentration. In our hospital institution, our case index dates back to the beginning of February 2017 and the follow-up of the cases indicates an upward trajectory. Sorting measures and isolations of potential patients, extensive screening and vaccinations were undertaken and coordinated from an internal management unit...
September 2017: Revue Médicale de Liège
https://www.readbyqxmd.com/read/28889075/epigenetic-clock-analysis-in-long-term-meditators
#12
Raphaëlle Chaix, Maria Jesús Alvarez-López, Maud Fagny, Laure Lemee, Béatrice Regnault, Richard J Davidson, Antoine Lutz, Perla Kaliman
In this paper, we examined whether meditation practice influences the epigenetic clock, a strong and reproducible biomarker of biological aging, which is accelerated by cumulative lifetime stress and with age-related chronic diseases. Using the Illumina 450K array platform, we analyzed the DNA methylome from blood cells of long-term meditators and meditation-naïve controls to estimate their Intrinsic Epigenetic Age Acceleration (IEAA), using Horvath's calculator. IEAA was similar in both groups. However, controls showed a different IEAA trajectory with aging than meditators: older controls (age≥52) had significantly higher IEAAs compared with younger controls (age <52), while meditators were protected from this epigenetic aging effect...
August 31, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28888646/disparity-in-the-nasopharyngeal-microbiota-between-healthy-cattle-on-feed-at-entry-processing-and-with-respiratory-disease
#13
Mohamed Zeineldin, James Lowe, Maria de Godoy, Nidia Maradiaga, Chelsey Ramirez, Mohamed Ghanem, Yassein Abd El-Raof, Brian Aldridge
Bovine respiratory disease (BRD) is one of the most serious causes of health and economic problems in the beef production industry, especially in recently weaned, intensely raised and newly transported feedlot cattle. While the importance of upper airway structure and function in the susceptibility of the lower respiratory tract to colonization with potential pathogens is well established, the role of the mucosal microbiota in respirtatory health is less well defined. The objective of this study was to characterize the nasopharyngeal microbiota of feedlot cattle at entry into a commercial feedlot, during initial management processing, and to compare the dynamics of change in these microbial communities between clinically healthy calves and those that develop BRD within the first month after entry...
September 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28887745/modeling-human-mortality-from-all-diseases-in-the-five-most-populated-countries-of-the-european-union
#14
Josef Dolejs
Age affects mortality from diseases differently than it affects mortality from external causes, such as accidents. Exclusion of the latter leads to the "all-diseases" category. The age trajectories of mortality from all diseases are studied in the five most populated countries of the EU, and the shape of these 156 age trajectories is investigated in detail. The arithmetic mean of ages where mortality reaches a minimal value is 8.47 years with a 95% confidence interval of [8.08, 8.85] years. Two simple deterministic models fit the age trajectories on the two sides of the mortality minimum...
September 8, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28887409/longitudinal-change-in-fasting-blood-glucose-and-myocardial-infarction-risk-in-a-population-without-diabetes
#15
Cheng Jin, Shuohua Chen, Anand Vaidya, Yuntao Wu, Zhijun Wu, Frank B Hu, Penny Kris-Etherton, Shouling Wu, Xiang Gao
OBJECTIVE: To examine the change in fasting blood glucose (FBG) during repeated assessments over time and its potential impact on the risk of developing myocardial infarction (MI). RESEARCH DESIGN AND METHODS: This prospective cohort study included 68,297 participants without diabetes (mean age 49 years) who were free of MI, stroke, and cancer prior to or in 2010 (baseline of the current analysis). FBG concentrations were measured in 2006, 2008, and 2010. The FBG trajectories during 2006-2010, the primary exposure of the current study, were identified by latent mixture modeling...
September 8, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28887294/impact-of-at-home-telemonitoring-on-health-services-expenditure-and-hospital-admissions-in-patients-with-chronic-conditions-before-and-after-control-intervention-analysis
#16
Branko Celler, Marlien Varnfield, Surya Nepal, Ross Sparks, Jane Li, Rajiv Jayasena
BACKGROUND: Telemonitoring is becoming increasingly important for the management of patients with chronic conditions, especially in countries with large distances such as Australia. However, despite large national investments in health information technology, little policy work has been undertaken in Australia in deploying telehealth in the home as a solution to the increasing demands and costs of managing chronic disease. OBJECTIVE: The objective of this trial was to evaluate the impact of introducing at-home telemonitoring to patients living with chronic conditions on health care expenditure, number of admissions to hospital, and length of stay (LOS)...
September 8, 2017: JMIR Medical Informatics
https://www.readbyqxmd.com/read/28887193/variability-in-self-rated-health-trajectories-from-adolescence-to-young-adulthood-by-demographic-factors
#17
Rebeccah Sokol, Susan Ennett, Nisha Gottfredson, Carolyn Halpern
Self-rated health (SRH) is a robust measure of general health status and an indicator of where and when to target disease prevention efforts-especially in adolescent populations when clinical endpoints are rare. This study's purpose was to model SRH trajectories from ages 13 to 31 and identify whether and when differences between demographic groups emerge. We employed a conditional latent growth model of SRH in December 2016 using a nationally representative sample of 11,512 adolescents from the National Longitudinal Study of Adolescent to Adult Health data collected in 1994-2008...
September 5, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28886015/freezing-during-tapping-tasks-in-patients-with-advanced-parkinson-s-disease-and-freezing-of-gait
#18
Arnaud Delval, Luc Defebvre, Céline Tard
INTRODUCTION: Parkinson's disease patients with freezing of gait also experience sudden motor blocks (freezing) during other repetitive motor tasks. We assessed the proportion of patients with advanced PD and freezing of gait who also displayed segmental "freezing" in tapping tasks. METHODS: Fifteen Parkinson's disease patients with freezing of gait were assessed. Freezing of gait was evaluated using a standardized gait trajectory with the usual triggers. Patients performed repetitive tapping movements (as described in the MDS-UPDRS task) with the hands or the feet in the presence or absence of a metronome set to 4 Hz...
2017: PloS One
https://www.readbyqxmd.com/read/28885953/expanding-the-understanding-of-risk-behavior-associated-with-homelessness-among-veterans
#19
Taylor Harris, Sara Kintzle, Suzanne Wenzel, Carl Andrew Castro
INTRODUCTION: To advance large-scale efforts to end veteran homelessness, an understanding of factors that contribute to housing insecurity is necessary. Common risk behaviors (e.g., substance use and risky sexual practices) are associated with lengthier experiences of homelessness among the general homeless population, but less understood among homeless veterans. Additionally, whether emerging risk behaviors among veterans (e.g., sensation seeking and aggression) are associated with lengthy homeless experiences is unknown...
September 2017: Military Medicine
https://www.readbyqxmd.com/read/28881207/pathway-from-poor-self-rated-health-to-mortality-explanatory-power-of-disease-diagnosis
#20
James Falconer, Amélie Quesnel-Vallée
Poor self-rated health has been consistently demonstrated as a reliable predictor for mortality, often exceeding the predictive power of other "objective" medical factors. Drawing from a theoretical framework for the cognitive processes underlying the self-assessment of health, this study seeks to test the knowledge mechanisms that moderate the predictive power of poor self-rated health. Using nationally-representative longitudinal data from the Canadian National Population Health Survey (NPHS) from 1994 to 2010, this study tests the effects of physician-diagnosed disease for the life course trajectory of self-rated health, and as a moderator for the power of poor self-rated health to predict proximate mortality...
August 14, 2017: Social Science & Medicine
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