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Ryan Rosenberry, Susie Chung, Michael D Nelson
Exercise represents a major hemodynamic stress that demands a highly coordinated neurovascular response in order to match oxygen delivery to metabolic demand. Reactive hyperemia (in response to a brief period of tissue ischemia) is an independent predictor of cardiovascular events and provides important insight into vascular health and vasodilatory capacity. Skeletal muscle oxidative capacity is equally important in health and disease, as it determines the energy supply for myocellular processes. Here, we describe a simple, non-invasive approach using near-infrared spectroscopy to assess each of these major clinical endpoints (reactive hyperemia, neurovascular coupling, and muscle oxidative capacity) during a single clinic or laboratory visit...
February 20, 2018: Journal of Visualized Experiments: JoVE
Wyatt E Lanik, Lily Xu, Cliff J Luke, Elise Z Hu, Pranjal Agrawal, Victoria S Liu, Rajesh Kumar, Alexa M Bolock, Congrong Ma, Misty Good
Human small intestinal enteroids are derived from the crypts and when grown in a stem cell niche contain all of the epithelial cell types. The ability to establish human enteroid ex vivo culture systems are important to model intestinal pathophysiology and to study the particular cellular responses involved. In recent years, enteroids from mice and humans are being cultured, passaged, and banked away for future use in several laboratories across the world. This enteroid platform can be used to test the effects of various treatments and drugs and what effects are exerted on different cell types in the intestine...
February 15, 2018: Journal of Visualized Experiments: JoVE
Joseph B DeShields, Rachel A Bomberger, James W Woodhall, David L Wheeler, Natalia Moroz, Dennis A Johnson, Kiwamu Tanaka
On-site diagnosis of plant diseases can be a useful tool for growers for timely decisions enabling the earlier implementation of disease management strategies that reduce the impact of the disease. Presently in many diagnostic laboratories, the polymerase chain reaction (PCR), particularly real-time PCR, is considered the most sensitive and accurate method for plant pathogen detection. However, laboratory-based PCRs typically require expensive laboratory equipment and skilled personnel. In this study, soil-borne pathogens of potato are used to demonstrate the potential for on-site molecular detection...
February 23, 2018: Journal of Visualized Experiments: JoVE
Tara Nietzold, Bradley M West, Michael Stuckelberger, Barry Lai, Stefan Vogt, Mariana I Bertoni
The quantification of X-ray fluorescence (XRF) microscopy maps by fitting the raw spectra to a known standard is crucial for evaluating chemical composition and elemental distribution within a material. Synchrotron-based XRF has become an integral characterization technique for a variety of research topics, particularly due to its non-destructive nature and its high sensitivity. Today, synchrotrons can acquire fluorescence data at spatial resolutions well below a micron, allowing for the evaluation of compositional variations at the nanoscale...
February 17, 2018: Journal of Visualized Experiments: JoVE
Calliandra Maria de-Souza-Silva, Fernanda Guilhelmelli, Daniel Zamith-Miranda, Marco Antônio de Oliveira, Joshua Daniel Nosanchuk, Ildinete Silva-Pereira, Patrícia Albuquerque
Fungal infections have become an important medical condition in the last decades, but the number of available antifungal drugs is limited. In this scenario, the search for new antifungal drugs is necessary. The protocol reported here details a method to screen peptides for their antifungal properties. It is based on the broth microdilution susceptibility test from the Clinical and Laboratory Standards Institute (CLSI) M27-A3 guidelines with modifications to suit the research of antimicrobial peptides as potential new antifungals...
February 14, 2018: Journal of Visualized Experiments: JoVE
Shaden Jobran, Randa Kattan, Jamal Shamaa, Hiyam Marzouqa, Musa Hindiyeh
BACKGROUND: Human adenoviruses have an important role in paediatric respiratory tract infections. They are estimated to cause 2-5% of the overall respiratory tract infections and 4-10% of all pneumonias. The aim of this study was to evaluate the clinical presentation and effect of adenoviral infection on the management of infected infants. METHODS: Data were collected from the medical records of patients infected with adenovirus and admitted to Caritas Baby Hospital...
February 21, 2018: Lancet
Jennifer F Buckman, Evgeny G Vaschillo, Maria Fonoberova, Igor Mezić, Marsha E Bates
OBJECTIVE: It has been nearly 15 years since Kazdin and Nock published methodological and research recommendations for understanding mechanisms of change in child and adolescent therapy. Their arguments and enthusiasm for research on mechanisms of behavior change (MOBCs) resonated across disciplines and disorders, as it shined a light on the crucial importance of understanding how and for whom treatments instigate behavior change and how therapeutic mechanisms might be extended to "situations and settings of everyday life...
March 2018: Journal of Studies on Alcohol and Drugs
Sandra N Bulens, Sarah H Yi, Maroya S Walters, Jesse T Jacob, Chris Bower, Jessica Reno, Lucy Wilson, Elisabeth Vaeth, Wendy Bamberg, Sarah J Janelle, Ruth Lynfield, Paula Snippes Vagnone, Kristin Shaw, Marion Kainer, Daniel Muleta, Jacqueline Mounsey, Ghinwa Dumyati, Cathleen Concannon, Zintars Beldavs, P Maureen Cassidy, Erin C Phipps, Nicole Kenslow, Emily B Hancock, Alexander J Kallen
In healthcare settings, Acinetobacter spp. bacteria commonly demonstrate antimicrobial resistance, making them a major treatment challenge. Nearly half of Acinetobacter organisms from clinical cultures in the United States are nonsusceptible to carbapenem antimicrobial drugs. During 2012-2015, we conducted laboratory- and population-based surveillance in selected metropolitan areas in Colorado, Georgia, Maryland, Minnesota, New Mexico, New York, Oregon, and Tennessee to determine the incidence of carbapenem-nonsusceptible A...
April 2018: Emerging Infectious Diseases
L Renee Ruhaak, Gege Xu, Qiongyu Li, Elisha Goonatilleke, Carlito B Lebrilla
Glycomic and glycoproteomic analyses involve the characterization of oligosaccharides (glycans) conjugated to proteins. Glycans are produced through a complicated nontemplate driven process involving the competition of enzymes that extend the nascent chain. The large diversity of structures, the variations in polarity of the individual saccharide residues, and the poor ionization efficiencies of glycans all conspire to make the analysis arguably much more difficult than any other biopolymer. Furthermore, the large number of glycoforms associated with a specific protein site makes it more difficult to characterize than any post-translational modification...
March 19, 2018: Chemical Reviews
Kate Basley, Dave Goulson
Arable field margins are often sown with wildflowers to encourage pollinators and other beneficial or desirable insects such as bees and butterflies. Concern has been raised that these margins may be contaminated with systemic pesticides such as neonicotinoids used on the adjacent crop, and that this may negatively impact beneficial insects. The use of neonicotinoids has been linked to butterfly declines, and species such as the common blue butterfly ( Polyommatus icarus) that feed upon legumes commonly sown in arable field margins, may be exposed to such toxins...
March 19, 2018: Environmental Science & Technology
Tokio Higaki, Shintaro Yamazaki, Yusuke Mitsuka, Masaru Aoki, Nao Yoshida, Yutaka Midorikawa, Hisashi Nakayama, Tadatoshi Takayama
To clarify whether high transient elevation of serum transaminase predicts severe complications and is related to the ischemic area on CT. Postoperative laboratory data and ischemia area on CT were analyzed on the basis of the presence of high transaminase elevation (aspartate aminotransferase (AST) > 1,000 IU/L within postoperative day (POD) 2 after liver resection. In the high elevation group, volume of ischemic areas was assessed by CT on POD2. The 538 patients were divided into a high transaminase group (n = 51) and a control group (n = 487)...
2018: Bioscience Trends
Fumika Ichino, Hidemasa Bono, Takeru Nakazato, Atsushi Toyoda, Asao Fujiyama, Kikuo Iwabuchi, Ryoichi Sato, Hiroko Tabunoki
Human intestinal absorption is estimated using a human colon carcinoma cell line (Caco-2) cells from human colorectal adenocarcinoma, intestinal perfusion, or a mammalian model. These current evaluation systems are limited in their ability to estimate human intestinal absorption. In addition, in vivo evaluation systems using laboratory animals such as mice and rats entail animal ethics problems, and it is difficult to screen compounds on a large scale at the drug discovery stage. Thus, we propose the use of Bombyx mori larvae for evaluation of intestinal absorption of compounds as an alternative system in this study...
2018: Drug Discoveries & Therapeutics
Emine Çamtosun, Zeynep Şıklar, Merih Berberoğlu
OBJECTIVES: Continuation of GH treatment in adolescents with severe childhood onset Idiopathic Growth Hormone Deficiency (IGHD) during the transition period, irrespective of achievement of final height is still debatable.We aimed to investigate the metabolic profile, BMD and body composition of the patients with isolated childhood onset GHD in whom GH treatments were terminated after they reached their final height, prospectively six months after the cessation of therapy. METHODS: Twelve patients, 6 of which with peak GH <5 ng/mL (Permanent GHD, Group 1), and 6 of which with peak GH >5 ng/mL (Transient GHD, Group 2) after insulin stimulation test were evaluated for anthropometric and laboratory parameters including fasting blood glucose (FBG), fasting insulin (FI), lipid profile, BMD, body composition measurements, and 24 hours ambulatory blood pressure monitoring before (baseline) and at six months after discontinuation of GH...
March 19, 2018: Journal of Clinical Research in Pediatric Endocrinology
László Márk, Mária Nagy, Győző Dani, Csaba Baranyai, Marianna Borbély, András Katona, Zoltán Jambrik
INTRODUCTION: The actual guidelines of cardiovascular prevention lay special emphasis on the lipid-lowering therapy of patients suffering from acute coronary syndrome (ACS). AIM: To evaluate the occurrence of high-intensity statin therapy, recommended by guidelines, at discharge in a Hungarian county hospital with hemodynamic laboratory in patients who underwent percutaneous intervention, furthermore the LDL-cholesterol (LDL-C) levels and goal attainment rate in the first year...
March 2018: Orvosi Hetilap
E Savi, S Peveri, C Cavaliere, S Masieri, M Montagni
The introduction of highly purified natural and recombinant single allergenic molecules represented an important improvement in the diagnosis of IgE sensitization. The identification of specific IgE against cross-reacting molecules such as profilin, lipid transfer proteins, calcium binding proteins or against “genuine molecules”, represents an added value and allows to distinguish between true and false polysensitization. In vitro tests add information to recognize patients with sensitization to genuine molecules that cause allergic diseases and to evaluate in childhood the spreading of sensitization for each molecule in order to choose the best treatment and to identify the ideal patient for allergen immunotherapy...
January 2018: Journal of Biological Regulators and Homeostatic Agents
Charalampos Seretis, Panagiota Kaisari, Kasun Wanigasooriya, Umar Shariff, Haney Youssef
PURPOSE: Malnutrition results in a significant increase in postoperative morbidity and mortality after abdominal surgery. Apart from the anthropometric assessments, malnutrition can be also assessed using laboratory scores, with the most widely used being Onodera's Prognostic Nutritional Index (PNI). The purpose of our study was to assess if the presence of malnutrition as calculated by the Onodera's PNI was associated with higher postoperative morbidity after elective colorectal cancer resection...
January 2018: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
Antonio López-Uceda, Adela P Galvín, Jesús Ayuso, José Ramón Jiménez, Tom Vanwalleghem, Adolfo Peña
Extensive green roofs are urban construction systems that provide thermal regulation and sound proofing for the buildings involved, in addition to providing an urban heat island mitigation or water retention. On the other hand, policies towards reduction of energy consumption, a circular economy and sustainability are core in the European Union. Motivated by this, an experimental study was carried out to evaluate the environmental risk assessment according to release levels of polluting elements on leachates of different green roof substrate mixtures based on recycled aggregates from construction and demolition waste through (i) the performance in laboratory of two procedures: compliance and percolation tests and (ii) an upscaled experimental leaching test for long-term on-site prediction...
March 19, 2018: Environmental Science and Pollution Research International
Xuefeng Wu, Hongli Yao, Qing Liu, Zhi Zheng, Lili Cao, Dongdong Mu, Hualin Wang, Shaotong Jiang, Xingjiang Li
The acetic acid bacterium Acetobacter pasteurianus plays an important role in acetic acid fermentation, which involves oxidation of ethanol to acetic acid through the ethanol respiratory chain under specific conditions. In order to obtain more suitable bacteria for the acetic acid industry, A. pasteurianus JST-S screened in this laboratory was compared with A. pasteurianus CICC 20001, a current industrial strain in China, to determine optimal fermentation parameters under different environmental stresses. The maximum total acid content of A...
March 19, 2018: Applied Biochemistry and Biotechnology
Hee Kyung Yang, Ki Won Moon, Min Jung Ji, Sang Beom Han, Jeong-Min Hwang
Purpose: To report a case of primary antiphospholipid syndrome presenting with isolated homonymous superior quadrantanopsia. Observations: A 50-year-old Korean man presented with subjective visual disturbance for 1 month. Visual field testing showed a right homonymous superior quadrantanopsia. Brain magnetic resonance imaging (MRI) revealed an old infarct in his left occipital lobe and multiple lesions in other areas of the brain. Laboratory tests showed a marked increase in serum anti-β2 glycoprotein I antibody, which remained elevated after 12 weeks...
June 2018: American Journal of Ophthalmology Case Reports
Xiao Yi
Biological functions - studied by molecular, systems and behavioral biology - are referred to as proximate mechanisms. Why and how they have emerged from the course of evolution are referred to as ultimate mechanisms. Despite the conceptual and technical schism between the disciplines that focus on each, studies from one side can benefit the other. Experimental evolution is an emerging field at the crossroads of functional and evolutionary biology. Herein microorganisms and mammalian cell lines evolve in well-controlled laboratory environments over multiple generations...
December 2017: Synthetic and Systems Biotechnology
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