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https://www.readbyqxmd.com/read/28302706/acclimatization-of-the-systemic-microcirculation-to-alveolar-hypoxia-is-mediated-by-inos-dependent-increased-nitric-oxide-availability
#1
Alfred J Casillan, Jie Chao, John G Wood, Norberto C Gonzalez
Rats breathing 10% O2 show a rapid and widespread systemic microvascular inflammation that results from nitric oxide (NO) depletion secondary to increased reactive O2 species (ROS) generation. The inflammation eventually resolves and the microcirculation becomes resistant to more severe hypoxia. These experiments were directed to determine the mechanisms underlying this microvascular acclimatization process. Intravital microscopy of the mesentery showed that after three weeks of hypoxia (PB ~380 Torr, inspired PO2 ~ 68-70 Torr) rats showed no evidence of inflammation; however, treatment with the inducible NO synthase (iNOS) inhibitor L-N(6)-(1-Iminoethyl) lysine dihydrochloride (L-NIL) led to ROS generation, leukocyte-endothelial adherence and emigration, and increased vascular permeability...
March 16, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28302107/readmission-and-mortality-in-patients-discharged-with-a-diagnosis-of-medical-observation-and-evaluation-z03-codes-from-an-acute-admission-unit-in-denmark-a-prospective-cohort-study
#2
Kåre Melchior Hansen, Henrik Nielsen, Betina Vest-Hansen, Anders Møllekær, Reimar Wernich Thomsen, Ole Mølgaard, Hans Kirkegaard, Elisabeth Svensson
BACKGROUND: We assessed the 30-day risk of readmission and mortality among patients receiving an International Classification of Diseases 10th edition diagnosis of medical observation and evaluation (Z03*) following admission to an acute medical admission unit (AMAU), stratified on any further specification of diagnosis during hospital stay. METHODS: We used Central Denmark's (Midt)-Electronic Patient Journal to identify patients with a Z03*-diagnosis among patients admitted to the AMAU, Aarhus University Hospital Nørrebrogade from April 2012 to March 2013, and noted any specification of diagnosis...
March 16, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28300147/emigration-dynamics-of-cockroaches-under-different-disturbance-regimes-do-not-depend-on-individual-personalities
#3
I Planas-Sitjà, M O Laurent Salazar, G Sempo, J L Deneubourg
Group-level properties, such as collective movements or decisions, can be considered an outcome of the interplay between individual behavior and social interactions. However, the respective influences of individual preferences and social interactions are not evident. In this research, we study the implications of behavioral variability on the migration dynamics of a group of gregarious insects (Periplaneta americana) subjected to two different disturbance regimes (one without disturbances and another one with high frequency of disturbances)...
March 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28296989/premature-mortality-among-patients-recently-discharged-from-their-first-inpatient-psychiatric-treatment
#4
Florian Walter, Matthew J Carr, Pearl L H Mok, Aske Astrup, Sussie Antonsen, Carsten B Pedersen, Jenny Shaw, Roger T Webb
Importance: Nationwide cohorts provide sufficient statistical power for examining premature, cause-specific mortality in patients recently discharged from inpatient psychiatric services. Objective: To investigate premature mortality in a nationwide cohort of patients recently discharged from inpatient psychiatric treatment at ages 15 to 44 years. Design, Setting, and Participants: This single-cohort design included all persons born in Denmark (N = 1 683 385) between January 1, 1967, and December 31, 1996...
March 15, 2017: JAMA Psychiatry
https://www.readbyqxmd.com/read/28293817/cd4-memory-t-cells-retain-surface-expression-of-cd31-independently-of-thymic-function-in-patients-with-lymphoproliferative-disorders-following-autologous-hematopoietic-stem-cell-transplantation
#5
Egor V Batorov, Marina A Tikhonova, Irina V Kryuchkova, Vera V Sergeevicheva, Svetlana A Sizikova, Galina Y Ushakova, Dariya S Batorova, Andrey V Gilevich, Alexander A Ostanin, Ekaterina Y Shevela, Elena R Chernykh
High-dose chemotherapy with autologous hematopoietic stem-cell transplantation (AHSCT) causes severe and long-lasting immunodeficiency in patients with lymphoproliferative disorders. The thymus begins to restore the T-cell repertoire approximately from the sixth month post-transplant. We assessed the dynamics of post-transplant recovery of CD4(+)CD45RA(+)CD31(+) T cells, "recent thymic emigrants" (RTEs), and a poorly described subtype of CD4(+)CD45RA(-)CD31(+) T cells in 90 patients with lymphoproliferative disorders following high-dose chemotherapy with AHSCT...
March 14, 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/28290773/the-hiv-care-cascade-and-sub-analysis-of-those-linked-to-but-not-retained-in-care-the-experience-from-a-tertiary-hiv-referral-service-in-dublin-ireland
#6
P McGettrick, B Ghavami-Kia, W Tinago, A Macken, J O'Halloran, J S Lambert, G Sheehan, P W G Mallon
BACKGROUND: The HIV Care Cascade model can be used to measure how clinical services align with United Nations' (UN) HIV treatment targets. Previous models have highlighted sequential losses at each step of the Cascade with a significant proportion being not retained in care (NRIC). OBJECTIVE: We aimed to assess the feasibility of meeting the UN targets and assess factors associated with, and calculate the true proportion of those, NRIC. METHODS: All people living with HIV who were linked to our service, one of three specialist HIV care providers in Dublin Ireland, from its establishment in 1993 to 1 December 2014, were included in the cohort and were categorized as linked to care, retained in care (RIC), on antiretroviral therapy (on ART), virally suppressed (HIV RNA <40copies/ml), and NRIC...
March 14, 2017: HIV Clinical Trials
https://www.readbyqxmd.com/read/28288406/early-adversity-and-risk-for-moderate-to-severe-unipolar-depressive-disorder-in-adolescence-and-adulthood-a-register-based-study-of-978-647-individuals
#7
Signe Kirk Dahl, Janne Tidselbak Larsen, Liselotte Petersen, Mads Bonde Ubbesen, Preben Bo Mortensen, Trine Munk-Olsen, Katherine Louise Musliner
BACKGROUND: Early adversity is a known risk factor for unipolar depression. We examined the impact of 9 types of early adversity on risk for moderate to severe unipolar depression in adolescence or adulthood, and evaluated whether these effects were moderated by gender and adversity timing. METHODS: We conducted a prospective, population-based cohort study using Danish national registers. The sample included all individuals born in Denmark between 1980 and 1998 (N=978,647)...
March 7, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28285995/deep-time-convergence-in-rove-beetle-symbionts-of-army-ants
#8
Munetoshi Maruyama, Joseph Parker
Recent adaptive radiations provide striking examples of convergence [1-4], but the predictability of evolution over much deeper timescales is controversial, with a scarcity of ancient clades exhibiting repetitive patterns of phenotypic evolution [5, 6]. Army ants are ecologically dominant arthropod predators of the world's tropics, with large nomadic colonies housing diverse communities of socially parasitic myrmecophiles [7]. Remarkable among these are many species of rove beetle (Staphylinidae) that exhibit ant-mimicking "myrmecoid" body forms and are behaviorally accepted into their aggressive hosts' societies: emigrating with colonies and inhabiting temporary nest bivouacs, grooming and feeding with workers, but also consuming the brood [8-11]...
March 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28284971/analysis-of-clinical-and-immunologic-phenotype-in-a-large-cohort-of-children-and-adults-with-cartilage-hair-hypoplasia
#9
Svetlana Kostjukovits, Paula Klemetti, Helena Valta, Timi Martelius, Luigi D Notarangelo, Mikko Seppänen, Mervi Taskinen, Outi Mäkitie
In our cohort of individuals with cartilage-hair hypoplasia 1) over 25% of patients manifest clinical combined immunodeficiency and they have lower CD3+, CD8+ and recent thymic emigrant counts; 2) specific antibody deficiency may exist; 3) low IgG2 levels associate with severe varicella.
March 8, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28281185/sex-and-age-as-determinants-of-rat-t-cell-phenotypic-characteristics-influence-of-peripubertal-gonadectomy
#10
Nevena Arsenović-Ranin, Duško Kosec, Ivan Pilipović, Mirjana Nacka-Aleksić, Biljana Bufan, Zorica Stojić-Vukanić, Gordana Leposavić
The study examined the influence of age, sex and peripubertal gonadectomy on a set of T-cell phenotypic parameters. Rats of both sexes were gonadectomised at the age of 1 month and peripheral blood and spleen T lymphocytes from non-gonadectomised and gonadectomised 3- and 11-month-old rats were examined for the expression of differentiation/activation (CD90/CD45RC) and immunoregulatory markers. Peripheral blood T lymphocytes from non-gonadectomised rats showed age-dependent sexual dimorphisms in (1) total count (lower in female than male 11-month-old rats); (2) CD4+:CD8 + cell ratio (higher in female than male rats of both ages); (3) the proportion of recent thymic emigrants in CD8 + T cells (lower in female than male 3-month-old rats) and (4) the proportions of mature naïve and memory/activated cells (irrespective of age, the proportion of naïve cells was higher, whereas that of memory/activated cells was lower in females)...
March 9, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28281090/against-cursory-treatments-in-ethics-of-medical-migration-from-underserved-countries
#11
Yusuf Yuksekdag
In a recent paper, Mpofu, Sen Gupta, and Hays (2016) attempt to outline the obligations of recruiting high-income countries (HICs) and would-be emigrant health workers (HWs) to tackle the effects of mass exodus of health workers from underserved regions. They reconstruct (i) Rawlsian and Kantian global justice approaches to argue for moral obligations of HICs and (ii) an individual justice approach to point to non-enforceable social responsibilities of HWs to assist their compatriots. This critical commentary demonstrates that the argumentation within their individual justice approach is problematic on the basis of three reasons: (1) their discussion under-theorizes and undervalues individual rights and more specifically the right to exit, (2) their argumentation in the latter part, even if problematically, does rather point to moral obligations in lieu of social responsibilities of HWs, and (3) they overlook many other important freedoms, interests, and values pertinent to the issue of retention...
March 9, 2017: Journal of Bioethical Inquiry
https://www.readbyqxmd.com/read/28280571/a-full-lifespan-model-of-vertebrate-lens-growth
#12
Hrvoje Šikić, Yanrong Shi, Snježana Lubura, Steven Bassnett
The mathematical determinants of vertebrate organ growth have yet to be elucidated fully. Here, we utilized empirical measurements and a dynamic branching process-based model to examine the growth of a simple organ system, the mouse lens, from E14.5 until the end of life. Our stochastic model used difference equations to model immigration and emigration between zones of the lens epithelium and included some deterministic elements, such as cellular footprint area. We found that the epithelial cell cycle was shortened significantly in the embryo, facilitating the rapid growth that marks early lens development...
January 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28273769/infection-related-health-care-utilization-among-people-with-and-without-multiple-sclerosis
#13
José Ma Wijnands, Elaine Kingwell, Feng Zhu, Yinshan Zhao, John D Fisk, Charity Evans, Ruth Ann Marrie, Helen Tremlett
BACKGROUND: Little is known about infection risk in multiple sclerosis (MS). OBJECTIVE: We examined infection-related health care utilization in people with and without MS. METHODS: Using population-based health administrative data from British Columbia, Canada, people with MS were followed from their first demyelinating claim (1996-2013) until death, emigration, or study end (2013). Infection-related hospital, physician, and prescription data of MS cases were compared with sex-, age-, and geographically matched controls using adjusted regression models...
December 1, 2016: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28267831/associations-between-early-implant-failure-patient-age-and-patient-mortality-a-15-year-follow-up-study-on-2-566-patients-treated-with-implant-supported-prostheses-in-the-edentulous-jaw
#14
Torsten Jemt, Mats Nilsson, Malin Olsson, Victoria Franke Stenport
PURPOSE: The aim of this study was to report the distribution of patients with early implant failures after implant treatment in the edentulous jaw with regard to age at surgery and association with patient mortality over a 15-year period. MATERIALS AND METHODS: All consecutively treated patients treated in the edentulous jaw at a single specialist clinic from 1986 to 1997 were included and followed up for 1 year for implant failures and for 15 years with regard to patient mortality...
March 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28264065/maternal-cancer-and-congenital-anomalies-in-children-a-danish-nationwide-cohort-study
#15
Natalie C Momen, Andreas Ernst, Linn Håkonsen Arendt, Jørn Olsen, Jiong Li, Mika Gissler, Finn Rasmussen, Cecilia Høst Ramlau-Hansen
Several studies on pregnancy-associated cancers have suggested an association with congenital anomalies in offspring. Previous studies have included maternal cancers diagnosed up to 2 years after pregnancy; however, long latency periods of some cancers mean that cancers diagnosed many years postpartum might have been present during pregnancy in a preclinical state. This paper considers the association between maternal cancers diagnosed from 2 years prior to pregnancy until the mother reaches 50 years of age, and congenital anomalies, as diagnosed at birth or within the first year of life...
2017: PloS One
https://www.readbyqxmd.com/read/28251801/origin-of-enriched-regulatory-t-cells-in-patients-receiving-combined-kidney-bone-marrow-transplantation-to-induce-transplantation-tolerance
#16
Ben Sprangers, Susan DeWolf, Thomas M Savage, Tatsuaki Morokata, Aleksandar Obradovic, Samuel A LoCascio, Brittany Shonts, Julien Zuber, Sai Ping Lau, Ravi Shah, Heather Morris, Valeria Steshenko, Emmanuel Zorn, Frederic I Preffer, Sven Olek, David M Dombkowski, Laurence A Turka, Robert Colvin, Robert Winchester, Tatsuo Kawai, Megan Sykes
We examined tolerance mechanisms in patients receiving HLA-mismatched combined kidney and bone marrow transplantation (CKBMT) that led to transient chimerism under a previously-published non-myeloablative conditioning regimen (Immune Tolerance Network study ITN036). Polychromatic flow cytometry (FCM) and high throughput sequencing of TCRβ hypervariable regions of DNA from peripheral blood T regulatory cells (Tregs) and CD4 non-Tregs revealed marked early enrichment of regulatory T cells (CD3(+) CD4(+) CD25(high) CD127(low) Foxp3(+) ) in blood that resulted from peripheral proliferation (Ki67(+) ), possibly new thymic emigration (CD31(+) ) and, in one tolerant subject, conversion from non-Tregs...
March 1, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28240678/stories-of-an-emigrant-physician-what-it-has-been-like-to-practice-in-canada-compared-with-the-united-states
#17
Lawrence R Robinson
No abstract text is available yet for this article.
February 24, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28240306/spatial-complexity-enhances-predictability-in-food-webs
#18
Akihiko Mougi
The prediction of an ecosystem's response to an environmental disturbance or the artificial control of ecosystems is a challenging task in ecology. Ecological theory predicts that disturbances frequently result in unexpected responses between interacting species due to the many indirect interactions within a complex community. However, such indeterminacy appears to be unusual in nature. Here using a meta-community food web, I show that spatiality is key to resolving this disparity. A moderate level of spatial coupling strength between habitats due to species migration increases the possibility of expected responses to press perturbation or predictability...
February 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28225789/non-melanoma-skin-cancer-and-risk-of-alzheimer-s-disease-and-all-cause-dementia
#19
Sigrun A J Schmidt, Anne G Ording, Erzsébet Horváth-Puhó, Henrik T Sørensen, Victor W Henderson
Cancer patients may be at decreased risk of Alzheimer's disease. This hypothesis is best developed for non-melanoma skin cancer (NMSC), but supportive epidemiological data are sparse. We therefore conducted a nationwide cohort study of the association between NMSC and Alzheimer's disease (main outcome) and all-cause dementia. Using Danish medical databases, we identified adults diagnosed with NMSC between 1 January 1980 and 30 November 2013 (n = 216,221) and a comparison cohort of five individuals matched to each NMSC patient by sex and birth year (n = 1,081,097)...
2017: PloS One
https://www.readbyqxmd.com/read/28224293/health-without-care-vulnerability-medical-brain-drain-and-health-worker-responsibilities-in-underserved-contexts
#20
Yusuf Yuksekdag
There is a consensus that the effects of medical brain drain, especially in the Sub-Saharan African countries, ought to be perceived as more than a simple misfortune. Temporary restrictions on the emigration of health workers from the region is one of the already existing policy measures to tackle the issue-while such a restrictive measure brings about the need for quite a justificatory work. A recent normative contribution to the debate by Gillian Brock provides a fruitful starting point. In the first step of her defence of emigration restrictions, Brock provides three reasons why skilled workers themselves would hold responsibilities to assist with respect to vital needs of their compatriots...
February 21, 2017: Health Care Analysis: HCA: Journal of Health Philosophy and Policy
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