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https://www.readbyqxmd.com/read/28650985/chronic-trichuris-muris-infection-causes-neoplastic-change-in-the-intestine-and-exacerbates-tumour-formation-in-apc-min-mice
#1
Kelly S Hayes, Laura J Cliffe, Alison J Bancroft, Simon P Forman, Seona Thompson, Cath Booth, Richard K Grencis
Incidences of infection-related cancers are on the rise in developing countries where the prevalence of intestinal nematode worm infections are also high. Trichuris muris (T. muris) is a murine gut-dwelling nematode that is the direct model for human T. trichiura, one of the major soil-transmitted helminth infections of humans. In order to assess whether chronic infection with T. muris does indeed influence the development of cancer hallmarks, both wild type mice and colon cancer model (APC min/+) mice were infected with this parasite...
June 26, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28650921/effect-of-continuity-of-care-on-drug-drug-interactions
#2
Jiun-Yu Guo, Yiing-Jenq Chou, Christy Pu
BACKGROUND: Drug-drug interaction (DDI) is a critical concern in health care systems because it is directly associated with patient outcomes and is generally preventable. However, few studies have been conducted on whether poor continuity of care (COC) is a determinant of DDIs and whether this effect varies by level of comorbidity. Patients with higher comorbidity normally require more complex treatment regimens than other patients, and hence their COC is more critical for ensuring the accuracy of their medication information...
June 23, 2017: Medical Care
https://www.readbyqxmd.com/read/28650915/the-brainstem-network-controlling-blood-pressure-an-important-role-for-pressor-sites-in-the-caudal-medulla-and-cervical-spinal-cord
#3
Michael G Z Ghali
: Although medullary control of blood pressure (BP) has been extensively studied, the contribution of critical regions, such as pressor sites in the caudal medulla and upper cervical spinal cord and the lateral tegmental field, remains controversial and underappreciated. A series of pressor sites caudal to the caudal ventrolateral medulla (CVLM), including the caudal pressor area (CPA) and medullocervical pressor area, play an important role in control of BP. Activation and inhibition of these sites elicits pressor and depressor responses, respectively...
June 24, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28650656/cytotoxic-and-mutagenic-properties-of-c3-epimeric-lesions-of-2-deoxyribonucleosides-in-escherichia-coli-cells
#4
Pengcheng Wang, Nicholas J Amato, Yinsheng Wang
Reactive oxygen species (ROS), resulting from endogenous metabolism and/or environmental exposure, can induce damage to the 2-deoxyribose moiety in DNA. Specifically, a hydrogen atom from each of the five carbon atoms in 2-deoxyribose can be abstracted by hydroxyl radical, and improper chemical repair of the ensuing radicals formed at the C1', C3', and C4' positions can lead to the stereochemical inversion at these carbons to yield epimeric 2-deoxyribose lesions. Although single-nucleobase lesions induced by ROS have been well characterized, few studies have been conducted to examine the biological consequences of the C3'-epimeric lesions of 2'-deoxynucleosides, i...
June 26, 2017: Biochemistry
https://www.readbyqxmd.com/read/28650639/on-site-determination-and-monitoring-of-real-time-fluence-delivery-for-an-operating-uv-reactor-based-on-a-true-fluence-rate-detector
#5
Mengkai Li, Wentao Li, Zhimin Qiang, Ernest R Blatchley
At present, on-site fluence (distribution) determination and monitoring of an operating UV system represents a considerable challenge. The recently developed micro-fluorescent silica detector (MFSD) is able to measure the approximate true fluence rate (FR) at a fixed position in a UV reactor that can be compared with a FR model directly. Hence it has provided a connection between model calculation and real-time fluence determination. In this study, an on-site determination and monitoring method of fluence delivery for an operating UV reactor was developed...
June 26, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28650574/injection-of-microporous-annealing-particle-map-hydrogels-in-the-stroke-cavity-reduces-gliosis-and-inflammation-and-promotes-npc-migration-to-the-lesion
#6
Lina R Nih, Elias Sideris, S Thomas Carmichael, Tatiana Segura
With the number of deaths due to stroke decreasing, more individuals are forced to live with crippling disability resulting from the stroke. To date, no therapeutics exist after the first 4.5 h after the stroke onset, aside from rest and physical therapy. Following stroke, a large influx of astrocytes and microglia releasing proinflammatory cytokines leads to dramatic inflammation and glial scar formation, affecting brain tissue's ability to repair itself. Pathological conditions, such as a stroke, trigger neural progenitor cells (NPCs) proliferation and migration toward the damaged site...
June 26, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28650433/the-evening-complex-coordinates-environmental-and-endogenous-signals-in-arabidopsis
#7
Daphne Ezer, Jae-Hoon Jung, Hui Lan, Surojit Biswas, Laura Gregoire, Mathew S Box, Varodom Charoensawan, Sandra Cortijo, Xuelei Lai, Dorothee Stöckle, Chloe Zubieta, Katja E Jaeger, Philip A Wigge
Plants maximize their fitness by adjusting their growth and development in response to signals such as light and temperature. The circadian clock provides a mechanism for plants to anticipate events such as sunrise and adjust their transcriptional programmes. However, the underlying mechanisms by which plants coordinate environmental signals with endogenous pathways are not fully understood. Using RNA-sequencing and chromatin immunoprecipitation sequencing experiments, we show that the evening complex (EC) of the circadian clock plays a major role in directly coordinating the expression of hundreds of key regulators of photosynthesis, the circadian clock, phytohormone signalling, growth and response to the environment...
June 26, 2017: Nature Plants
https://www.readbyqxmd.com/read/28650341/two-rheumatoid-arthritis-specific-autoantigens-correlate-microbial-immunity-with-autoimmune-responses-in-joints
#8
Annalisa Pianta, Sheila L Arvikar, Klemen Strle, Elise E Drouin, Qi Wang, Catherine E Costello, Allen C Steere
In rheumatoid arthritis (RA), immunological triggers at mucosal sites, such as the gut microbiota, may promote autoimmunity that affects joints. Here, we used discovery-based proteomics to detect HLA-DR-presented peptides in synovia or peripheral blood mononuclear cells and identified 2 autoantigens, N-acetylglucosamine-6-sulfatase (GNS) and filamin A (FLNA), as targets of T and B cell responses in 52% and 56% of RA patients, respectively. Both GNS and FLNA were highly expressed in synovia. GNS appeared to be citrullinated, and GNS antibody values correlated with anti-citrullinated protein antibody (ACPA) levels...
June 26, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28650175/bioactive-peptide-natural-products-as-lead-structures-for-medicinal-use
#9
Tam Dang, Roderich D Süssmuth
The need for new drugs for the treatment of various diseases is enormous. From the previous century until the present, numerous peptide and peptide-derived natural products have been isolated from bacteria and fungi. Hence, microorganisms play a pivotal role as sources for novel drugs with an emphasis on anti-infective agents. Various disciplines from biology, chemistry, and medicine are involved in early stages of the search for peptide natural products including taxonomy, microbiology, bioanalytics, bioinformatics, and medicinal chemistry...
June 26, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28649619/variable-frequency-of-lrrk2-variants-in-the-latin-american-research-consortium-on-the-genetics-of-parkinson-s-disease-large-pd-a-case-of-ancestry
#10
Mario Cornejo-Olivas, Luis Torres, Mario R Velit-Salazar, Miguel Inca-Martinez, Pilar Mazzetti, Carlos Cosentino, Federico Micheli, Claudia Perandones, Elena Dieguez, Victor Raggio, Vitor Tumas, Vanderci Borges, Henrique B Ferraz, Carlos R M Rieder, Artur Shumacher-Schuh, Carlos Velez-Pardo, Marlene Jimenez-Del-Rio, Francisco Lopera, Jorge Chang-Castello, Brennie Andreé-Munoz, Sarah Waldherr, Dora Yearout, Cyrus P Zabetian, Ignacio F Mata
Mutations in Leucine-Rich Repeat Kinase 2 (LRRK2), primarily located in codons G2019 and R1441, represent the most common genetic cause of Parkinson's disease in European-derived populations. However, little is known about the frequency of these mutations in Latin American populations. In addition, a prior study suggested that a LRRK2 polymorphism (p.Q1111H) specific to Latino and Amerindian populations might be a risk factor for Parkinson's disease, but this finding requires replication. We screened 1734 Parkinson's disease patients and 1097 controls enrolled in the Latin American Research Consortium on the Genetics of Parkinson's disease (LARGE-PD), which includes sites in Argentina, Brazil, Colombia, Ecuador, Peru, and Uruguay...
2017: NPJ Parkinson's Disease
https://www.readbyqxmd.com/read/28649353/genetic-identification-of-source-and-likely-vector-of-a-widespread-marine-invader
#11
Stacy A Krueger-Hadfield, Nicole M Kollars, Allan E Strand, James E Byers, Sarah J Shainker, Ryuta Terada, Thomas W Greig, Mareike Hammann, David C Murray, Florian Weinberger, Erik E Sotka
The identification of native sources and vectors of introduced species informs their ecological and evolutionary history and may guide policies that seek to prevent future introductions. Population genetics provides a powerful set of tools to identify origins and vectors. However, these tools can mislead when the native range is poorly sampled or few molecular markers are used. Here, we traced the introduction of the Asian seaweed Gracilaria vermiculophylla (Rhodophyta) into estuaries in coastal western North America, the eastern United States, Europe, and northwestern Africa by genotyping more than 2,500 thalli from 37 native and 53 non-native sites at mitochondrial cox1 and 10 nuclear microsatellite loci...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28649323/individual-based-analysis-of-hair-corticosterone-reveals-factors-influencing-chronic-stress-in-the-american-pika
#12
Matthew D Waterhouse, Bryson Sjodin, Chris Ray, Liesl Erb, Jennifer Wilkening, Michael A Russello
Glucocorticoids are often measured in wildlife to assess physiological responses to environmental or ecological stress. Hair, blood, saliva, or fecal samples are generally used depending on the timescale of the stress response being investigated and species-specific considerations. Here, we report the first use of hair samples to measure long-term corticosterone levels in the climate-sensitive American pika (Ochotona princeps). We validated an immunoassay-based measurement of corticosterone extracted from hair samples and compared corticosterone estimates obtained from plasma, hair, and fecal samples of nine pikas...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28649243/distinct-blood-and-visceral-adipose-tissue-regulatory-t-cell-and-innate-lymphocyte-profiles-characterize-obesity-and-colorectal-cancer
#13
Gloria Donninelli, Manuela Del Cornò, Marina Pierdominici, Beatrice Scazzocchio, Rosaria Varì, Barbara Varano, Ilenia Pacella, Silvia Piconese, Vincenzo Barnaba, Massimo D'Archivio, Roberta Masella, Lucia Conti, Sandra Gessani
Visceral adipose tissue (VAT) is a main site where metabolic and immunologic processes interplay to regulate, at local and systemic level, the inflammatory status and immune response. Obesity-associated inflammation and immune dysfunctions are inextricably linked to tumor but, in spite of intense efforts, the mechanisms underpinning this association remain elusive. In this report, we characterized the profile of VAT-associated and circulating innate lymphocyte and regulatory T (Treg) cell subsets underlying inflammatory conditions, such as obesity and colorectal cancer (CRC)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28648659/enterochromaffin-cells-are-gut-chemosensors-that-couple-to-sensory-neural-pathways
#14
Nicholas W Bellono, James R Bayrer, Duncan B Leitch, Joel Castro, Chuchu Zhang, Tracey A O'Donnell, Stuart M Brierley, Holly A Ingraham, David Julius
Dietary, microbial, and inflammatory factors modulate the gut-brain axis and influence physiological processes ranging from metabolism to cognition. The gut epithelium is a principal site for detecting such agents, but precisely how it communicates with neural elements is poorly understood. Serotonergic enterochromaffin (EC) cells are proposed to fulfill this role by acting as chemosensors, but understanding how these rare and unique cell types transduce chemosensory information to the nervous system has been hampered by their paucity and inaccessibility to single-cell measurements...
June 21, 2017: Cell
https://www.readbyqxmd.com/read/28648568/application-of-machine-learning-classification-for-structural-brain-mri-in-mood-disorders-critical-review-from-a-clinical-perspective
#15
REVIEW
Yong-Ku Kim, Kyoung-Sae Na
Mood disorders are a highly prevalent group of mental disorders causing substantial socioeconomic burden. There are various methodological approaches for identifying the underlying mechanisms of the etiology, symptomatology, and therapeutics of mood disorders; however, neuroimaging studies have provided the most direct evidence for mood disorder neural substrates by visualizing the brains of living individuals. The prefrontal cortex, hippocampus, amygdala, thalamus, ventral striatum, and corpus callosum are associated with depression and bipolar disorder...
June 22, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28648313/cost-of-osteoporotic-fractures-in-singapore
#16
Charmaine Shuyu Ng, Tang Ching Lau, Yu Ko
OBJECTIVES: To estimate the 3-month direct and indirect costs associated with osteoporotic fractures from both the hospital's and patient's perspectives in Singapore and to compare the cost between acute and prevalent osteoporotic fractures. METHODS: Resource use and expenditure data were collected using interviewer-administered questionnaires at baseline and at a 3-month follow-up between July 2013 and January 2014. Estimated osteoporotic fracture-related costs included hospitalizations, accident and emergency room visits, outpatient physician visits, laboratory tests, medications, transportation, health care and community services, special equipment and home/car modifications, and productivity loss...
May 2017: Value in Health Regional Issues
https://www.readbyqxmd.com/read/28647474/antiviral-profiling-of-the-capsid-assembly-modulator-bay41-4109-on-full-length-hbv-genotype-a-h-clinical-isolates-and-core-site-directed-mutants-in-vitro
#17
Jan Martin Berke, Ying Tan, Thierry Verbinnen, Pascale Dehertogh, Karen Vergauwen, Ann Vos, Oliver Lenz, Frederik Pauwels
The HBV core protein represents an attractive target for new antiviral therapies due to its multiple functions within the viral life-cycle. Here, we report the antiviral activity of the capsid assembly modulator (CAM) BAY41-4109 and two nucleos(t)ide analogues (NAs) on a diverse panel of 54 HBV clinical isolates from genotype (GT) A-H and assessed the impact of core amino acid (aa) substitutions using site-directed mutants (SDMs). The median EC50 values of BAY41-4109 across genotypes ranged from 26 nM in GT G to 215 nM in GT F irrespective of the presence of NA resistance mutations compared to 43 nM for the GT D reference construct...
June 21, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28647465/french-registry-on-acute-st-elevation-and-non-st-elevation-myocardial-infarction-2015-fast-mi-2015-design-and-baseline-data
#18
Loïc Belle, Guillaume Cayla, Yves Cottin, Pierre Coste, Khalife Khalife, Jean-Noël Labèque, Bruno Farah, Thibaut Perret, Patrick Goldstein, Pierre-Yves Gueugniaud, François Braun, Jacques Gauthier, Martine Gilard, Jean-Yves Le Heuzey, Nicolas Naccache, Elodie Drouet, Vincent Bataille, Jean Ferrières, Etienne Puymirat, François Schiele, Tabassome Simon, Nicolas Danchin
BACKGROUND: The FAST-MI programme, consisting of 1-month surveys of patients admitted to hospital for acute myocardial infarction (AMI) in France, has run since 2005. AIM: To gather data on the characteristics, management and outcomes of patients hospitalized for AMI at the end of 2015 in France and to provide comparisons with the previous surveys. METHODS: Consecutive adults with ST-segment elevation myocardial infarction (STEMI) or non-ST-segment-elevation myocardial infarction (NSTEMI) with symptom onset≤48hours were included over a 1-month period, with a possible extension of recruitment for 1 additional month...
June 21, 2017: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/28647366/crystal-structure-of-the-crenarchaeal-exoiii-ap-endonuclease-sisexoiii-reveals-a-conserved-disulfide-bond-endowing-the-protein-with-thermostability
#19
Zhou Yan, Zenglin Yuan, Jinfeng Ni, Lichuan Gu, Yulong Shen
AP endonuclease recognizes and cleaves apurinic/apyrimidinic (AP) sites and plays a critical role in base excision repair. Many ExoIII and EndoIV family AP endonucleases have been characterized both biochemically and structurally in Eukaryote and Bacteria. However, relatively fewer have been studied in Euryarchaeota and there is no such report on an AP endonuclease from Crenarchaeota. Here we report, for the first time, the crystal structure of a crenarchaeal ExoIII AP endonuclease, SisExoIII, from Sulfolobus islandicus REY15A...
June 21, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28647296/multiple-stressors-including-contaminant-exposure-and-parasite-infection-predict-spleen-mass-and-energy-expenditure-in-breeding-ring-billed-gulls
#20
Sarah C Marteinson, David J Marcogliese, Jonathan Verreault
Daily energy expenditure (DEE) in animals is influenced by many factors although the impact of stressors remains largely unknown. The objective of this study was to determine how multiple physiological stressors (parasite infection and contaminant exposure) and natural challenges (energy-demanding activities and weather conditions) may affect DEE in nesting ring-billed gulls (Larus delawarensis) exposed to high concentrations of persistent organic contaminants (POPs). Physical activity, temperature, gastrointestinal parasitic worm abundance, relative spleen mass, plasma thyroid hormone levels and liver concentrations of POPs were determined; field metabolic rate (FMR) was used as a measure of DEE...
June 21, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
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