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https://www.readbyqxmd.com/read/28550872/hiatal-and-paraesophageal-hernia-repair-in-pediatric-patients
#1
Erin M Garvey, Daniel J Ostlie
Hiatal and paraesophageal hernia (HH/PEH) can be congenital, resulting from embryologic abnormalities/genetic predisposition, or acquired, most commonly after gastroesophageal surgery such as fundoplication. Minimizing circumferential esophageal dissection at the time of Nissen fundoplication has been shown to decrease the risk of acquired HH/PEH from 36.5% to 12.2%. Gastrointestinal, respiratory, and constitutional symptoms, including anemia and failure to thrive, are common with high rates of associated gastroesophageal reflux...
April 2017: Seminars in Pediatric Surgery
https://www.readbyqxmd.com/read/28550871/gastroesophageal-reflux
#2
Bethany J Slater, Steven S Rothenberg
Gastroesophageal reflux disease (GERD) is a very common condition and affects approximately 7-20% of the pediatric population. Symptoms from pathological GERD include regurgitation, irritability when feeding, respiratory problems, and substernal pain. Treatment typically starts with dietary modifications and postural changes. Antireflux medications may then be added. Indications for operative management in the pediatric population include failure of medical therapy with poor weight gain or failure to thrive, continued respiratory symptoms, and complications such as esophagitis...
April 2017: Seminars in Pediatric Surgery
https://www.readbyqxmd.com/read/28550297/reef-building-corals-thrive-within-hot-acidified-and-deoxygenated-waters
#3
Emma F Camp, Matthew R Nitschke, Riccardo Rodolfo-Metalpa, Fanny Houlbreque, Stephanie G Gardner, David J Smith, Marco Zampighi, David J Suggett
Coral reefs are deteriorating under climate change as oceans continue to warm and acidify and thermal anomalies grow in frequency and intensity. In vitro experiments are widely used to forecast reef-building coral health into the future, but often fail to account for the complex ecological and biogeochemical interactions that govern reefs. Consequently, observations from coral communities under naturally occurring extremes have become central for improved predictions of future reef form and function. Here, we present a semi-enclosed lagoon system in New Caledonia characterised by diel fluctuations of hot-deoxygenated water coupled with tidally driven persistently low pH, relative to neighbouring reefs...
May 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28547584/characterization-of-a-newly-isolated-freshwater-eustigmatophyte-alga-capable-of-utilizing-far-red-light-as-its-sole-light-source
#4
Benjamin M Wolf, Dariusz M Niedzwiedzki, Nikki Cecil M Magdaong, Robyn Roth, Ursula Goodenough, Robert E Blankenship
Oxygenic phototrophs typically utilize visible light (400-700 nm) to drive photosynthesis. However, a large fraction of the energy in sunlight is contained in the far-red region, which encompasses light beyond 700 nm. In nature, certain niche environments contain high levels of this far-red light due to filtering by other phototrophs, and in these environments, organisms with photosynthetic antenna systems adapted to absorbing far-red light are able to thrive. We used selective far-red light conditions to isolate such organisms in environmental samples...
May 25, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28543918/gut-microbiota-of-the-pine-weevil-degrades-conifer-diterpenes-and-increases-insect-fitness
#5
Aileen Berasategui, Hassan Salem, Christian Paetz, Maricel Santoro, Jonathan Gershenzon, Martin Kaltenpoth, Axel Schmdit
The pine weevil (Hylobius abietis), a major pest of conifer forests throughout Europe, feeds on the bark and cambium, tissues rich in terpenoid resins that are toxic to many insect herbivores. Here we report the ability of the pine weevil gut microbiota to degrade the diterpene acids of Norway spruce. The diterpene acid levels present in ingested bark were substantially reduced on passage through the pine weevil gut. This reduction was significantly less upon antibiotic treatment, and supplementing the diet with gut suspensions from untreated insects restored the ability to degrade diterpenes...
May 21, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28542310/geographic-distribution-of-angiostrongylus-cantonensis-in-wild-rats-rattus-rattus-and-terrestrial-snails-in-florida-usa
#6
Heather D Stockdale Walden, John D Slapcinsky, Shannon Roff, Jorge Mendieta Calle, Zakia Diaz Goodwin, Jere Stern, Rachel Corlett, Julia Conway, Antoinette McIntosh
The parasitic nematode Angiostrongylus cantonensis is a major cause of eosinophilic meningitis in humans, and has been documented in other incidental hosts such as birds, horses, dogs and non-human primates. It is endemic in Hawaii, and there have been sporadic reports in the southern continental United States. This parasite uses rats as definitive hosts and snails as intermediate hosts. In this study, we collected potential definitive and intermediate hosts throughout Florida to ascertain the geographic distribution in the state: Rats, environmental rat fecal samples, and snails were collected from 18 counties throughout the state...
2017: PloS One
https://www.readbyqxmd.com/read/28540675/viral-micrornas-host-micrornas-regulating-viruses-and-bacterial-microrna-like-rnas
#7
Sara-Elizabeth Cardin, Glen M Borchert
As masters of genome-wide regulation, miRNAs represent a key component in the complex architecture of cellular processes. Over the last decade, it has become increasingly apparent that miRNAs have many important roles in the development of disease and cancer. Recently, however, their role in viral and bacterial gene regulation as well as host gene regulation during disease progression has become a field of interest. Due to their small size, miRNAs are the ideal mechanism for bacteria and viruses that have limited room in their genomes, as a single miRNA can target up to ~30 genes...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28540258/horizontally-acquired-biosynthesis-genes-boost-coxiella-burnetii-s-physiology
#8
Abraham S Moses, Jess A Millar, Matteo Bonazzi, Paul A Beare, Rahul Raghavan
Coxiella burnetii, the etiologic agent of acute Q fever and chronic endocarditis, has a unique biphasic life cycle, which includes a metabolically active intracellular form that occupies a large lysosome-derived acidic vacuole. C. burnetii is the only bacterium known to thrive within such an hostile intracellular niche, and this ability is fundamental to its pathogenicity; however, very little is known about genes that facilitate Coxiella's intracellular growth. Recent studies indicate that C. burnetii evolved from a tick-associated ancestor and that the metabolic capabilities of C...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28538514/long-term-outcome-of-4-patients-with-transcobalamin-deficiency-caused-by-2-novel-tcn2-mutations
#9
Marwan Nashabat, Gustavo Maegawa, Peter H Nissen, Ebba Nexo, Hussain Al-Shamrani, Mohammed Al-Owain, Majid Alfadhel
Cobalamin (vitamin B12 [Cbl]) is an essential cofactor for many biochemical pathways. Transcobalamin (TC) is required to internalize Cbl into the cells through membrane receptor-mediated endocytosis. Cbl is then processed in the cytoplasm and mitochondria by complementation factors leading to its active metabolites; methylcobalamin and 5-deoxyadenosyl-cobalamin. Deficiency of TC results in an elevation in methylmalonic acid and homocysteine. Patients usually present with macrocytic anemia, pancytopenia, failure to thrive, gastrointestinal symptoms, and neurological dysfunction...
May 22, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28535136/eosinophilic-esophagitis-in-a-kitten
#10
Julie Pera, Douglas Palma, Taryn A Donovan
A 4 mo old intact male kitten was presented for chronic regurgitation and failure to thrive after weaning to dry food. Esophageal dilatation and severe diffuse proliferative lesions of the esophageal mucosa were found via radiography and esophagoscopy, respectively. Histopathologic examination revealed severe, chronic, diffuse, hyperplastic eosinophilic and mastocytic esophagitis. Eosinophilic infiltrates were prominent, with a mean of 29.8 eosinophils per high power field, supportive of eosinophilic esophagitis (EoE)...
May 23, 2017: Journal of the American Animal Hospital Association
https://www.readbyqxmd.com/read/28534879/epibionts-dominate-metabolic-functional-potential-of-trichodesmium-colonies-from-the-oligotrophic-ocean
#11
Kyle R Frischkorn, Mónica Rouco, Benjamin A S Van Mooy, Sonya T Dyhrman
Trichodesmium is a genus of marine diazotrophic colonial cyanobacteria that exerts a profound influence on global biogeochemistry, by injecting 'new' nitrogen into the low nutrient systems where it occurs. Colonies of Trichodesmium ubiquitously contain a diverse assemblage of epibiotic microorganisms, constituting a microbiome on the Trichodesmium host. Metagenome sequences from Trichodesmium colonies were analyzed along a resource gradient in the western North Atlantic to examine microbiome community structure, functional diversity and metabolic contributions to the holobiont...
May 23, 2017: ISME Journal
https://www.readbyqxmd.com/read/28533950/are-invasive-populations-characterized-by-a-broader-diet-than-native-populations
#12
Julien Courant, Solveig Vogt, Raquel Marques, John Measey, Jean Secondi, Rui Rebelo, André De Villiers, Flora Ihlow, Charlotte De Busschere, Thierry Backeljau, Dennis Rödder, Anthony Herrel
BACKGROUND: Invasive species are among the most significant threats to biodiversity. The diet of invasive animal populations is a crucial factor that must be considered in the context of biological invasions. A broad dietary spectrum is a frequently cited characteristic of invasive species, allowing them to thrive in a wide range of environments. Therefore, empirical studies comparing diet in invasive and native populations are necessary to understand dietary requirements, dietary flexibility, and the associated impacts of invasive species...
2017: PeerJ
https://www.readbyqxmd.com/read/28533412/extraordinarily-rapid-speciation-in-a-marine-fish
#13
Paolo Momigliano, Henri Jokinen, Antoine Fraimout, Ann-Britt Florin, Alf Norkko, Juha Merilä
Divergent selection may initiate ecological speciation extremely rapidly. How often and at what pace ecological speciation proceeds to yield strong reproductive isolation is more uncertain. Here, we document a case of extraordinarily rapid speciation associated with ecological selection in the postglacial Baltic Sea. European flounders (Platichthys flesus) in the Baltic exhibit two contrasting reproductive behaviors: pelagic and demersal spawning. Demersal spawning enables flounders to thrive in the low salinity of the Northern Baltic, where eggs cannot achieve neutral buoyancy...
May 22, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28531792/an-evaluation-of-the-sustainability-of-onsite-wastewater-treatment-systems-for-nutrient-management
#14
Nancy Diaz-Elsayed, Xiaofan Xu, Maraida Balaguer-Barbosa, Qiong Zhang
The impairment of water bodies from nutrient pollution is a challenging environmental problem that could lead to high eutrophic conditions, fish kills, and human illness, while negatively impacting industries that rely on thriving water bodies. Onsite wastewater treatment systems (OWTSs) are a major source of nutrients, however no prior studies have conducted a holistic sustainability assessment of OWTSs that considers their ability to manage nutrients at the household-level in the United States. The aim of this study is therefore to evaluate the environmental and economic impacts of conventional and advanced OWTSs with respect to their ability to remove total nitrogen (TN)...
May 5, 2017: Water Research
https://www.readbyqxmd.com/read/28531204/messinian-age-and-savannah-environment-of-the-possible-hominin-graecopithecus-from-europe
#15
Madelaine Böhme, Nikolai Spassov, Martin Ebner, Denis Geraads, Latinka Hristova, Uwe Kirscher, Sabine Kötter, Ulf Linnemann, Jérôme Prieto, Socrates Roussiakis, George Theodorou, Gregor Uhlig, Michael Winklhofer
Dating fossil hominids and reconstructing their environments is critically important for understanding human evolution. Here we date the potentially oldest hominin, Graecopithecus freybergi from Europe and constrain the environmental conditions under which it thrived. For the Graecopithecus-bearing Pikermi Formation of Attica/Greece, a saline aeolian dust deposit of North African (Sahara) provenance, we obtain an age of 7.37-7.11 Ma, which is coeval with a dramatic cooling in the Mediterranean region at the Tortonian-Messinian transition...
2017: PloS One
https://www.readbyqxmd.com/read/28530879/fear-not-htm-will-thrive-even-as-it-grows
#16
Kenneth E Maddock
No abstract text is available yet for this article.
May 2017: Biomedical Instrumentation & Technology
https://www.readbyqxmd.com/read/28528673/acid-sensing-ion-channel-pharmacology-past-present-and-future-%C3%A2
#17
Lachlan D Rash
pH is one of the most strictly controlled parameters in mammalian physiology. An extracellular pH of ~7.4 is crucial for normal physiological processes, and perturbations to this have profound effects on cell function. Acidic microenvironments occur in many physiological and pathological conditions, including inflammation, bone remodeling, ischemia, trauma, and intense synaptic activity. Cells exposed to these conditions respond in different ways, from tumor cells that thrive to neurons that are either suppressed or hyperactivated, often fatally...
2017: Advances in Pharmacology
https://www.readbyqxmd.com/read/28528652/nutritional-immunity-and-fungal-pathogenesis-the-struggle-for-micronutrients-at-the-host-pathogen-interface
#18
Dhara Malavia, Aaron Crawford, Duncan Wilson
All living organisms require certain micronutrients such as iron, zinc, manganese and copper for cellular function and growth. For human pathogens however, the maintenance of metal ion homeostasis is particularly challenging. This is because the mammalian host actively enforces extremes of micronutrient availability on potential microbial invaders-processes collectively termed nutritional immunity. The role of iron sequestration in controlling microbial infections is well established and, more recently, the importance of other metals including zinc, manganese and copper has been recognised...
2017: Advances in Microbial Physiology
https://www.readbyqxmd.com/read/28527583/molecular-characterization-of-aspergillus-fumigatus-tcsc-a-characteristic-type-iii-hybrid-histidine-kinase-of-filamentous-fungi-harboring-six-hamp-domains
#19
Anja Spadinger, Frank Ebel
The type III hybrid histidine kinase (HHK) TcsC enables the pathogenic mold Aspergillus fumigatus to thrive under hyperosmotic conditions. It is, moreover, of particular interest, since it is the target of certain antifungal agents, such as fludioxonil. This study was aimed at a functional characterization of the domains that constitute the sensing and the kinase module of TcsC. The sensing module consists of six HAMP domains, an architecture that is commonly found in type III HHKs of filamentous fungi. To dissect the functional role of the individual domains, we have analyzed a set of truncated derivatives of TcsC with respect to their impact on fungal growth and their ability to respond to hyperosmotic stress and fludioxonil...
May 11, 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/28526118/effects-of-elevated-nutrients-and-co2-emission-scenarios-on-three-coral-reef-macroalgae
#20
Dorothea Bender-Champ, Guillermo Diaz-Pulido, Sophie Dove
Coral reef macroalgae are expected to thrive in the future under conditions that are deleterious to the health of reef-building corals. Here we examined how macroalgae would be affected by exposure to future CO2 emission scenarios (pCO2 and temperature), enriched nutrients and combinations of both. The species tested, Laurencia intricata (Rhodophyta), Turbinaria ornata and Chnoospora implexa (both Phaeophyceae), have active carbon-concentrating mechanisms but responded differently to the treatments. L. intricata showed high mortality under nutrient enriched RCP4...
May 2017: Harmful Algae
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