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https://www.readbyqxmd.com/read/29031214/land-use-regression-models-for-the-oxidative-potential-of-fine-particles-pm2-5-in-five-european-areas
#1
John Gulliver, David Morley, Chrissi Dunster, Adrienne McCrea, Erik van Nunen, Ming-Yi Tsai, Nicoltae Probst-Hensch, Marloes Eeftens, Medea Imboden, Regina Ducret-Stich, Alessio Naccarati, Claudia Galassi, Andrea Ranzi, Mark Nieuwenhuijsen, Ariadna Curto, David Donaire-Gonzalez, Marta Cirach, Roel Vermeulen, Paolo Vineis, Gerard Hoek, Frank J Kelly
Oxidative potential (OP) of particulate matter (PM) is proposed as a biologically-relevant exposure metric for studies of air pollution and health. We aimed to evaluate the spatial variability of the OP of measured PM2.5 using ascorbate (AA) and (reduced) glutathione (GSH), and develop land use regression (LUR) models to explain this spatial variability. We estimated annual average values (m(-3)) of OP(AA) and OP(GSH) for five areas (Basel, CH; Catalonia, ES; London-Oxford, UK (no OP(GSH)); the Netherlands; and Turin, IT) using PM2...
October 12, 2017: Environmental Research
https://www.readbyqxmd.com/read/28902124/guanylate-cyclase-c-activation-shapes-the-intestinal-microbiota-in-patients-with-familial-diarrhea-and-increased-susceptibility-for-crohn-s-disease
#2
Rune R Tronstad, Martin Kummen, Kristian Holm, Hilde L von Volkmann, Jarl A Anmarkrud, Marte L Høivik, Bjørn Moum, Odd H Gilja, Trygve Hausken, John Baines, Tom H Karlsen, Torunn Fiskerstrand, Johannes R Hov
BACKGROUND: With 25% prevalence of Crohn's disease, Familial GUCY2C diarrhea syndrome (FGDS) is a monogenic disorder potentially suited to study initiating factors in inflammatory bowel disease (IBD). We aimed to characterize the impact of an activating GUCY2C mutation on the gut microbiota in patients with FGDS controlling for Crohn's disease status and to determine whether changes share features with those observed in unrelated patients with IBD. METHODS: Bacterial DNA from fecal samples collected from patients with FGDS (N = 20), healthy relatives (N = 11), unrelated healthy individuals (N = 263), and IBD controls (N = 46) was subjected to sequencing of the V3-V4 region of the 16S rRNA gene to determine gut microbiota composition...
October 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28816579/application-of-the-distance-based-f-test-in-an-mgwas-investigating-%C3%AE-diversity-of-intestinal-microbiota-identifies-variants-in-slc9a8-nhe8-and-3-other-loci
#3
Malte C Rühlemann, Frauke Degenhardt, Louise B Thingholm, Jun Wang, Jurgita Skiecevičienė, Philipp Rausch, Johannes R Hov, Wolfgang Lieb, Tom H Karlsen, Matthias Laudes, John F Baines, Femke-Anouska Heinsen, Andre Franke
Factors shaping the human intestinal microbiota range from environmental influences, like smoking and exercise, over dietary patterns and disease to the host's genetic variation. Recently, we could show in a microbiome genome-wide association study (mGWAS) targeting genetic variation influencing the β diversity of gut microbial communities, that approximately 10% of the overall gut microbiome variation can be explained by host genetics. Here, we report on the application of a new method for genotype-β-diversity association testing, the distance-based F (DBF) test...
August 17, 2017: Gut Microbes
https://www.readbyqxmd.com/read/28766306/interpretation-of-brain-ct-scans-in-the-field-by-critical-care-physicians-in-a-mobile-stroke-unit
#4
Maren Ranhoff Hov, Erik Zakariassen, Thomas Lindner, Terje Nome, Kristi G Bache, Jo Røislien, Jostein Gleditsch, Volker Solyga, David Russell, Christian G Lund
BACKGROUND AND PURPOSE: In acute stroke, thromboembolism or spontaneous hemorrhage abruptly reduces blood flow to a part of the brain. To limit necrosis, rapid radiological identification of the pathological mechanism must be conducted to allow the initiation of targeted treatment. The aim of the Norwegian Acute Stroke Prehospital Project is to determine if anesthesiologists, trained in prehospital critical care, may accurately assess cerebral computed tomography (CT) scans in a mobile stroke unit (MSU)...
July 27, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28761687/systemic-sclerosis-is-associated-with-specific-alterations-in-gastrointestinal-microbiota-in-two-independent-cohorts
#5
Elizabeth R Volkmann, Anna-Maria Hoffmann-Vold, Yu-Ling Chang, Jonathan P Jacobs, Kirsten Tillisch, Emeran A Mayer, Philip J Clements, Johannes R Hov, Martin Kummen, Øyvind Midtvedt, Venu Lagishetty, Lin Chang, Jennifer S Labus, Øyvind Molberg, Jonathan Braun
OBJECTIVE: To compare faecal microbial composition in patients with systemic sclerosis (SSc) from 2 independent cohorts with controls and to determine whether certain genera are associated with SSc-gastrointestinal tract (GIT) symptoms. DESIGN: Adult patients with SSc from the University of California, Los Angeles (UCLA) and Oslo University Hospital (OUH) and healthy controls participated in this study (1:1:1). All participants provided stool specimens for 16S rRNA sequencing...
2017: BMJ Open Gastroenterology
https://www.readbyqxmd.com/read/28695657/hla-haplotypes-in-primary-sclerosing-cholangitis-patients-of-admixed-and-non-european-ancestry
#6
E K K Henriksen, M K Viken, M Wittig, K Holm, T Folseraas, S Mucha, E Melum, J R Hov, K N Lazaridis, B D Juran, O Chazouillères, M Färkkilä, D N Gotthardt, P Invernizzi, M Carbone, G M Hirschfield, S M Rushbrook, E Goode, C Y Ponsioen, R K Weersma, B Eksteen, K K Yimam, S C Gordon, D Goldberg, L Yu, C L Bowlus, A Franke, B A Lie, T H Karlsen
Primary sclerosing cholangitis (PSC) is strongly associated with several human leukocyte antigen (HLA) haplotypes. Due to extensive linkage disequilibrium and multiple polymorphic candidate genes in the HLA complex, identifying the alleles responsible for these associations has proven difficult. We aimed to evaluate whether studying populations of admixed or non-European descent could help in defining the causative HLA alleles. When assessing haplotypes carrying HLA-DRB1*13:01 (hypothesized to specifically increase the susceptibility to chronic cholangitis), we observed that every haplotype in the Scandinavian PSC population carried HLA-DQB1*06:03...
July 11, 2017: HLA
https://www.readbyqxmd.com/read/28694130/bowel-damage-in-patients-with-long-term-crohn-s-disease-assessed-by-magnetic-resonance-enterography-and-the-l%C3%A3-mann-index
#7
Aida Kapic Lunder, Jørgen Jahnsen, Linda Tøften Bakstad, Arne Borthne, Johannes Roksund Hov, Morten Vatn, Anne Negård
BACKGROUND & AIMS: Magnetic resonance enterography (MRE) is used to evaluate the extent and complications of Crohn's disease (CD). MRE results are used in calculation of the Lémann index (LI) score, which quantifies bowel damage. The long-term outcomes of CD are uncertain; we aimed to assess bowel disease and damage in patients with CD for 20 years using MRE and the LI. METHODS: We performed a follow-up analysis of a population-based cohort of 237 patients in southeastern Norway diagnosed with CD from 1990 to 1993...
July 8, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28688889/increased-secondary-primary-bile-acid-ratio-in-chronic-heart-failure
#8
Cristiane C K Mayerhofer, Thor Ueland, Kaspar Broch, Royce P Vincent, Gemma F Cross, Christen P Dahl, Pål Aukrust, Lars Gullestad, Johannes R Hov, Marius Trøseid
OBJECTIVE: Bile acids (BAs) are now recognized as signaling molecules and emerging evidence suggests that BAs affect cardiovascular function. The gut microbiota has recently been linked to the severity of heart failure (HF), and microbial metabolism has a major impact on BA homeostasis. We aimed to investigate the pattern of BAs, and particularly microbiota-transformed (secondary) BAs, in patients with chronic HF. METHODS AND RESULTS: This was a prospective, observational, single-center study including 142 patients with chronic HF and 20 age- and sex-matched healthy control subjects...
July 5, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/28684524/citywide-effects-of-high-occupancy-vehicle-restrictions-evidence-from-three-in-one-in-jakarta
#9
Rema Hanna, Gabriel Kreindler, Benjamin A Olken
Widespread use of single-occupancy cars often leads to traffic congestion. Using anonymized traffic speed data from Android phones collected through Google Maps, we investigated whether high-occupancy vehicle (HOV) policies can combat congestion. We studied Jakarta's "three-in-one" policy, which required all private cars on two major roads to carry at least three passengers during peak hours. After the policy was abruptly abandoned in April 2016, delays rose from 2.1 to 3.1 minutes per kilometer (min/km) in the morning peak and from 2...
July 7, 2017: Science
https://www.readbyqxmd.com/read/28683838/a-novel-ultra-high-throughput-16s-rrna-gene-amplicon-sequencing-library-preparation-method-for-the-illumina-hiseq-platform
#10
Eric J de Muinck, Pål Trosvik, Gregor D Gilfillan, Johannes R Hov, Arvind Y M Sundaram
BACKGROUND: Advances in sequencing technologies and bioinformatics have made the analysis of microbial communities almost routine. Nonetheless, the need remains to improve on the techniques used for gathering such data, including increasing throughput while lowering cost and benchmarking the techniques so that potential sources of bias can be better characterized. METHODS: We present a triple-index amplicon sequencing strategy to sequence large numbers of samples at significantly lower c ost and in a shorter timeframe compared to existing methods...
July 6, 2017: Microbiome
https://www.readbyqxmd.com/read/28655229/mekanisk-trombektomi-ved-hjerneinfarkt-%C3%A2-%C3%A2-den-prehospitale-fasen-er-avgj%C3%A3-rende
#11
Maren Ranhoff Hov, Hans Morten Lossius, Christian Georg Lund
No abstract text is available yet for this article.
June 27, 2017: Tidsskrift for Den Norske Lægeforening: Tidsskrift for Praktisk Medicin, Ny Række
https://www.readbyqxmd.com/read/28645263/microbiota-dependent-metabolite-and-cardiovascular-disease-marker-trimethylamine-n-oxide-tmao-is-associated-with-monocyte-activation-but-not-platelet-function-in-untreated-hiv-infection
#12
Judith M Haissman, Anna K Haugaard, Sisse R Ostrowski, Rolf K Berge, Johannes R Hov, Marius Trøseid, Susanne D Nielsen
BACKGROUND: HIV infection is associated with increased risk of cardiovascular disease beyond that explained by traditional risk factors. Altered gut microbiota, microbial translocation, and immune activation have been proposed as potential triggers. The microbiota-dependent metabolite trimethylamine-N-oxide (TMAO) predicts myocardial infarction (MI) in the general population and has recently been shown to induce platelet hyperreactivity. In the present study, we investigated if TMAO was associated with platelet function, microbial translocation, and immune activation in both untreated and combination anti-retroviral therapy (cART) HIV infection...
June 23, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28588885/elevated-trimethylamine-n-oxide-tmao-is-associated-with-poor-prognosis-in-primary-sclerosing-cholangitis-patients-with-normal-liver-function
#13
Martin Kummen, Mette Vesterhus, Marius Trøseid, Bjørn Moum, Asbjørn Svardal, Kirsten Muri Boberg, Pål Aukrust, Tom Hemming Karlsen, Rolf Kristian Berge, Johannes Roksund Hov
BACKGROUND: Trimethylamine-N-oxide (TMAO) is produced in the liver from trimethylamine, which is exclusively generated by gut bacteria. OBJECTIVE: The objective of this article is to investigate the relationship between TMAO and primary sclerosing cholangitis (PSC) and its clinical characteristics. METHODS: Serum TMAO was measured in 305 PSC patients, 90 ulcerative colitis patients and 99 healthy controls. RESULTS: In PSC patients with normal liver function (n = 197), TMAO was higher in patients reaching liver transplantation or death during follow-up than those who did not, with an optimal TMAO cut-off of 4...
June 2017: United European Gastroenterology Journal
https://www.readbyqxmd.com/read/28561881/reference-limits-for-chromogranin-a-cyfra-21-1-ca-125-ca-19-9-and-carcinoembryonic-antigen-in-patients-with-chronic-kidney-disease
#14
Gustav Mikkelsen, Arne Åsberg, Maria E Hultström, Knut Aasarød, Gunhild G Hov
BACKGROUND: Patients with chronic kidney disease (CKD) may have increased plasma concentrations of some tumor markers even when no cancer is present. Previous studies have indicated that plasma concentrations of chromogranin A (CGA), cytokeratin 19 fragments (CYFRA 21-1), cancer antigen 125 (CA 125), cancer antigen 19-9 (CA 19-9) and carcinoembryonic antigen (CEA) are higher in patients with CKD but without cancer, than in healthy individuals, and this can make interpretation of results more complicated...
May 27, 2017: International Journal of Biological Markers
https://www.readbyqxmd.com/read/28378853/serum-metabolomic-profiling-highlights-pathways-associated-with-liver-fat-content-in-a-general-population-sample
#15
M Koch, S Freitag-Wolf, S Schlesinger, J Borggrefe, J R Hov, M K Jensen, J Pick, M R P Markus, T Höpfner, G Jacobs, S Siegert, A Artati, G Kastenmüller, W Römisch-Margl, J Adamski, T Illig, M Nothnagel, T H Karlsen, S Schreiber, A Franke, M Krawczak, U Nöthlings, W Lieb
BACKGROUND/OBJECTIVES: Fatty liver disease (FLD) is an important intermediate trait along the cardiometabolic disease spectrum and strongly associates with type 2 diabetes. Knowledge of biological pathways implicated in FLD is limited. An untargeted metabolomic approach might unravel novel pathways related to FLD. SUBJECTS/METHODS: In a population-based sample (n=555) from Northern Germany, liver fat content was quantified as liver signal intensity using magnetic resonance imaging...
August 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28346795/understanding-the-emission-impacts-of-high-occupancy-vehicle-hov-to-high-occupancy-toll-hot-lane-conversions-experience-from-atlanta-georgia
#16
Yanzhi Ann Xu, Haobing Liu, Michael O Rodgers, Angshuman Guin, Michael Hunter, Adnan Sheikh, Randall Guensler
Converting a congested high-occupancy vehicle (HOV) lane into a high-occupancy toll (HOT) lane is a viable option for improving travel time reliability for carpools and buses that use the managed lane. However, the emission impacts of HOV-to-HOT conversions are not well understood. The lack of emission impact quantification for HOT conversions creates a policy challenge for agencies making transportation funding choices. The goal of this paper is to evaluate the case study of before-and-after changes in vehicle emissions for the Atlanta, Georgia, I-85 HOV/HOT lane conversion project, implemented in October 2011...
August 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28267887/enhanced-liver-fibrosis-test-predicts-transplant-free-survival-in-primary-sclerosing-cholangitis-a-multi-centre-study
#17
Elisabeth M G de Vries, Martti Färkkilä, Piotr Milkiewicz, Johannes R Hov, Bertus Eksteen, Douglas Thorburn, Olivier Chazouillères, Albert Pares, Ståle Nygård, Odd H Gilja, Ewa Wunsch, Pietro Invernizzi, Marco Carbone, Francesca Bernuzzi, Kirsten M Boberg, Helge Røsjø, William Rosenberg, Ulrich H Beuers, Cyriel Y Ponsioen, Tom H Karlsen, Mette Vesterhus
BACKGROUND & AIMS: Biomarkers reflecting disease activity and prognosis in primary sclerosing cholangitis (PSC) have not been firmly established. Enhanced liver fibrosis (ELF) test was previously reported to predict outcome in PSC. We aimed to validate the prognostic utility of ELF test in an independent, multi-centre, retrospective PSC study population. METHODS: We collected serum samples from PSC patients from seven countries. We estimated rates of transplant-free survival by the Kaplan-Meier method, used Cox proportional hazards regression to explore the association between ELF test and clinical outcome and determined prognostic performance of ELF test by computing the area under the receiver operating characteristic (AUC-ROC) curve...
October 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28245880/pre-hospital-ct-diagnosis-of-subarachnoid-hemorrhage
#18
Maren Ranhoff Hov, Annette Ryen, Katrine Finsnes, Janne Storflor, Thomas Lindner, Jostein Gleditsch, Christian Georg Lund
BACKGROUND: Subarachnoid hemorrhage (SAH) is associated with higher mortality in the acute phase than other stroke types. There is a particular risk of early and devastating re-bleeding. Patients therefore need urgent assessment in a neurosurgical department, and the shorter the time from symptom onset to diagnosis the better. CASE PRESENTATION: The Norwegian Acute Stroke Pre-hospital Project (NASPP) has developed a Mobile Stroke Unit (MSU) model, which is staffed with anesthesiologists also trained in pre-hospital clinical assessment of acute stroke patients and interpretation of computerized tomography (CT)...
February 28, 2017: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
https://www.readbyqxmd.com/read/28161472/novel-serum-and-bile-protein-markers-predict-primary-sclerosing-cholangitis-disease-severity-and-prognosis
#19
Mette Vesterhus, Anders Holm, Johannes Roksund Hov, Ståle Nygård, Erik Schrumpf, Espen Melum, Liv Wenche Thorbjørnsen, Vemund Paulsen, Knut Lundin, Inge Dale, Odd Helge Gilja, Serge J L B Zweers, Morten Vatn, Frank G Schaap, Peter L M Jansen, Thor Ueland, Helge Røsjø, Bjørn Moum, Cyriel Y Ponsioen, Kirsten Muri Boberg, Martti Färkkilä, Tom H Karlsen, Fridtjof Lund-Johansen
BACKGROUND & AIMS: Prognostic biomarkers are lacking in primary sclerosing cholangitis, hampering patient care and the development of therapy. We aimed to identify novel protein biomarkers of disease severity and prognosis in primary sclerosing cholangitis (PSC). METHODS: Using a bead-based array targeting 63 proteins, we profiled a derivation panel of Norwegian endoscopic retrograde cholangiography bile samples (55 PSC, 20 disease controls) and a Finnish validation panel (34 PSC, 10 disease controls)...
June 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28030369/intestinal-microbiota-in-primary-sclerosing-cholangitis
#20
Johannes R Hov, Martin Kummen
PURPOSE OF REVIEW: Alterations of the gut-liver axis have been linked to the pathogenesis of primary sclerosing cholangitis (PSC) since the disease was first described. The purpose of this review is to discuss multiple recent studies on the intestinal microbiota in human PSC and experimental models of this disease. RECENT FINDINGS: Data are available from eight cross-sectional studies of human PSC, which include a variable number of patients (n = 11-85), material (mucosal or fecal), and microbiota profiling methodology...
March 2017: Current Opinion in Gastroenterology
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