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https://www.readbyqxmd.com/read/29777430/the-artificial-humic-substance-hs1500-does-not-inhibit-photosynthesis-of-the-green-alga-desmodesmus-armatus-in-vivo-but-interacts-with-the-photosynthetic-apparatus-of-isolated-spinach-thylakoids-in-vitro
#1
Matthias Gilbert, Hanno Bährs, Christian E W Steinberg, Christian Wilhelm
Humic substances (HSs) can influence the growth and composition of freshwater phytoplankton assemblage. Since HSs contain many phenolic and quinonic moieties and cause growth reductions in eco-physiological field experiments, HSs are considered photosystem II herbicides. To test this specific mode of action in vivo and in vitro, respectively, we used intact cells of the green alga Desmodesmus armatus, as well as thylakoids isolated from spinach (Spinacia oleracea) as a model system for the green algal chloroplast...
May 18, 2018: Photosynthesis Research
https://www.readbyqxmd.com/read/29774027/clinical-remission-of-sight-threatening-non-infectious-uveitis-is-characterized-by-an-upregulation-of-peripheral-t-regulatory-cell-polarized-towards-t-bet-and-tigit
#2
Rose M Gilbert, Xiaozhe Zhang, Robert D Sampson, Michael R Ehrenstein, Dao X Nguyen, Mahid Chaudhry, Charles Mein, Nadiya Mahmud, Grazyna Galatowicz, Oren Tomkins-Netzer, Virginia L Calder, Sue Lightman
Background: Non-infectious uveitis can cause chronic relapsing and remitting ocular inflammation, which may require high dose systemic immunosuppression to prevent severe sight loss. It has been classically described as an autoimmune disease, mediated by pro-inflammatory Th1 and Th17 T-cell subsets. Studies suggest that natural immunosuppressive CD4+ CD25+ FoxP3+ T-regulatory cells (Tregs) are involved in resolution of inflammation and may be involved in the maintenance of clinical remission...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29773370/rheological-and-structural-properties-of-complex-arabinoxylans-from-plantago-ovata-seed-mucilage-under-non-gelled-conditions
#3
Long Yu, Gleb E Yakubov, Marta Martínez-Sanz, Elliot P Gilbert, Jason R Stokes
Two gel-forming arabinoxylan (AX) fractions with very similar linkage composition and molecular weight distributions have been isolated from Plantago ovata seed mucilage. Both isolated fractions have distinct gel properties attributed to differences in intermolecular hydrogen bonding. This study probes the effect of hydrogen bonding on molecular interactions of P. ovata AX fractions under non-gelled conditions achieved using a mild hydrogen bonding inhibitor, 0.2 M KOH. Chain conformation, relaxation dynamics and interactions between AX molecules are investigated using a combination of rheological techniques and small angle X-ray and neutron scattering...
August 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29771812/a-method-for-functional-task-alignment-analysis-of-an-arthrocentesis-simulator
#4
Reid A Adams, Gregory E Gilbert, Lisa A Buckley, Rodolfo Nino Fong, I Carmen Fuentealba, Erika L Little
INTRODUCTION: During simulation-based education, simulators are subjected to procedures composed of a variety of tasks and processes. Simulators should functionally represent a patient in response to the physical action of these tasks. The aim of this work was to describe a method for determining whether a simulator does or does not have sufficient functional task alignment (FTA) to be used in a simulation. METHODS: Potential performance checklist items were gathered from published arthrocentesis guidelines and aggregated into a performance checklist using Lawshe's method...
May 16, 2018: Simulation in Healthcare: Journal of the Society for Simulation in Healthcare
https://www.readbyqxmd.com/read/29771386/immunotherapy-in-cns-cancers-the-role-of-immune-cell-trafficking
#5
Nivedita M Ratnam, Mark R Gilbert, Amber J Giles
Glioblastoma (GBM) is a highly malignant CNS tumor with very poor survival despite intervention with conventional therapeutic strategies. Although the CNS is separated from the immune system by the blood-brain barrier (BBB) and the blood-cerebrospinal fluid barrier (BCSFB), emerging evidence of immune surveillance and the selective infiltration of GBMs by immune suppressive cells indicates that there is breakdown or compromise of these physical barriers. This in turn offers hope that immunotherapy can be applied to specifically target and reduce tumor burden...
May 15, 2018: Neuro-oncology
https://www.readbyqxmd.com/read/29771242/generalisation-of-gilbert-damping-and-magnetic-inertia-parameter-as-a-series-of-higher-order-relativistic-terms
#6
Ritwik Mondal, Marco Berritta, Peter Oppeneer
The phenomenological Landau-Lifshitz-Gilbert (LLG) equation of motion remains as the cornerstone of contemporary magnetisation dynamics studies, wherein the Gilbert damping parameter has been attributed to first-order relativistic effects. To include magnetic inertial effects the LLG equation has previously been extended with a supplemental inertia term and the arising inertial dynamics has been related to second-order relativistic effects. Here we start from the relativistic Dirac equation and, performing a Foldy-Wouthuysen transformation, derive a generalised Pauli spin Hamiltonian that contains relativistic correction terms to any higher order...
May 17, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29771007/dichlorophenylacrylonitriles-as-ahr-ligands-displaying-selective-breast-cancer-cytotoxicity-in-vitro
#7
Jennifer R Baker, Jayne Gilbert, Stefan Paula, Xiao Zhu, Jennette A Sakoff, Adam McCluskey
Knoevenagel condensation of 3,4-dichloro- and 2,6-dichloro- phenylacetonitriles gave a library of dichlorophenylacrylonitriles. Our leads 5 and 6 displayed 0.56±0.03 and 0.127±0.04 μM growth inhibition (GI₅₀) and 260-fold selectivity for the MCF-7 breast cancer cell line. A 2,6-dichlorophenyl moiety saw a 10-fold potency loss; additional nitrogen moieties (-NO₂) enhanced activity (26 and 27), with the corresponding -NH₂ analogues (29 and 30) more potent. Despite this, both 29 (2.8±0.03 μM) and 30 (2...
May 17, 2018: ChemMedChem
https://www.readbyqxmd.com/read/29770996/prenatal-diagnosis-of-holoprosencephaly
#8
Youssef A Kousa, Adré J du Plessis, Gilbert Vezina
Holoprosencephaly is a spectrum of congenital defects of forebrain development characterized by incomplete separation of the cerebral hemispheres. In vivo diagnosis can be established with prenatal brain imaging and disease severity correlates with extent of abnormally developed brain tissue. Advances in magnetic resonance imaging (MRI) over the past 25 years and their application to the fetus have enabled diagnosis of holoprosencephaly in utero. Here, we report on the prenatal diagnosis of holoprosencephaly using MRI as part of a diagnostic and management evaluation at a tertiary and quaternary referral center...
May 17, 2018: American Journal of Medical Genetics. Part C, Seminars in Medical Genetics
https://www.readbyqxmd.com/read/29770342/fibular-collateral-ligament-varus-stress-radiographic-analysis-using-3-different-clinical-techniques
#9
Patrick W Kane, Mark E Cinque, Gilbert Moatshe, Jorge Chahla, Nicholas N DePhillipo, Matthew T Provencher, Robert F LaPrade
Background: Fibular collateral ligament (FCL) tears are challenging to diagnose. Left untreated, FCL tears lead to residual ligament instability and increased joint loading on the medial compartment of the knee. Additionally, when a concomitant anterior cruciate ligament (ACL) reconstruction is performed, increased forces on reconstruction grafts occur, which may lead to premature graft failure. Stress radiographs constitute a reliable and validated technique for the objective assessment of a complete grade III FCL tear...
May 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29769287/the-protective-role-of-macrophage-migration-inhibitory-factor-in-acute-kidney-injury-after-cardiac-surgery
#10
Christian Stoppe, Luisa Averdunk, Andreas Goetzenich, Josefin Soppert, Arnaud Marlier, Sandra Kraemer, Jil Vieten, Mark Coburn, Ana Kowark, Bong-Song Kim, Gernot Marx, Steffen Rex, Akinobu Ochi, Lin Leng, Gilbert Moeckel, Andreas Linkermann, Omar El Bounkari, Alexander Zarbock, Jürgen Bernhagen, Sonja Djudjaj, Richard Bucala, Peter Boor
Acute kidney injury (AKI) represents the most frequent complication after cardiac surgery. Macrophage migration inhibitory factor (MIF) is a stress-regulating cytokine that was shown to protect the heart from myocardial ischemia-reperfusion injury, but its role in the pathogenesis of AKI remains unknown. In an observational study, serum and urinary MIF was quantified in 60 patients scheduled for elective conventional cardiac surgery with the use of cardiopulmonary bypass. Cardiac surgery triggered an increase in MIF serum concentrations, and patients with high circulating MIF (>median) 12 hours after surgery had a significantly reduced risk of developing AKI (relative risk reduction, 72...
May 16, 2018: Science Translational Medicine
https://www.readbyqxmd.com/read/29768287/ultrasound-computed-tomography-and-magnetic-resonance-imaging-in-a-patient-with-medullary-cystic-kidney-disease
#11
Gilbert Whang, Hisham Tchelepi
Among the renal cystic diseases that result in end-stage renal disease, an important hereditary cause is medullary cystic kidney disease, which affects adults in an autosomal dominant pattern. It is characterized by progressive renal failure, tubulointerstitial fibrosis, and formation of small cysts in the renal medulla and corticomedullary junction. While the appearance of medullary/corticomedullary cysts may not be pathognomonic for medullary cystic kidney disease, encountering a patient with renal failure and medullary/corticomedullary cysts should prompt further investigation, given the implication of having the disease...
May 15, 2018: Ultrasound Quarterly
https://www.readbyqxmd.com/read/29767449/outcomes-of-intradetrusor-onabotulinum-toxin-a-injection-in-patients-with-parkinson-s-disease
#12
Gregory Vurture, Benoit Peyronnet, Andrew Feigin, Milton C Biagioni, Rebecca Gilbert, Nirit Rosenblum, Steven Frucht, Alessandro Di Rocco, Victor W Nitti, Benjamin M Brucker
OBJECTIVE: To assess the safety and efficacy of intradetrusor onabotulinum toxin A injections for the treatment of overactive bladder (OAB) in patients with Parkinson's disease (PD). METHODS: All PD patients who underwent intradetrusor injections of onabotulinum toxin A (BoNT-A) for storage symptoms between 2010 and 2017 were included in a retrospective study. A 100 U dose of BoNT-A (Botox®, Allergan Irvine, CA) was used for the first injection in all patients...
May 16, 2018: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/29767308/differentiating-pseudoprogression-from-true-progression-analysis-of-radiographic-biologic-and-clinical-clues-in-gbm
#13
Lindsay S Rowe, John A Butman, Megan Mackey, Joanna H Shih, Theresa Cooley-Zgela, Holly Ning, Mark R Gilbert, DeeDee K Smart, Kevin Camphausen, Andra V Krauze
INTRODUCTION: Pseudoprogression (PsP) is a diagnostic dilemma in glioblastoma (GBM) after chemoradiotherapy (CRT). Magnetic resonance imaging (MRI) features may fail to distinguish PsP from early true progression (eTP), however clinical findings may aid in their distinction. METHODS: Sixty-seven patients received CRT for GBM between 2003 and 2016, and had pre- and post-treatment imaging suitable for retrospective evaluation using RANO criteria. Patients with signs of progression within the first 12-weeks post-radiation (P-12) were selected...
May 16, 2018: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29765941/nano-and-micro-patterned-s-h-and-x-pdms-for-cell-based-applications-comparison-of-wettability-roughness-and-cell-derived-parameters
#14
Marina Scharin-Mehlmann, Aaron Häring, Mathias Rommel, Tobias Dirnecker, Oliver Friedrich, Lothar Frey, Daniel F Gilbert
Polydimethylsiloxane (PDMS) is a promising biomaterial for generating artificial extracellular matrix (ECM) like patterned topographies, yet its hydrophobic nature limits its applicability to cell-based approaches. Although plasma treatment can enhance the wettability of PDMS, the surface is known to recover its hydrophobicity within a few hours after exposure to air. To investigate the capability of a novel PDMS-type (X-PDMS) for in vitro based assessment of physiological cell properties, we designed and fabricated plane as well as nano- and micrometer-scaled pillar-patterned growth substrates using the elastomer types S-, H- and X-PDMS, which were fabricated from commercially available components...
2018: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/29765626/a-focused-library-synthesis-and-cytotoxicity-of-quinones-derived-from-the-natural-product-bolinaquinone
#15
Azadeh Ghods, Jayne Gilbert, Jennifer R Baker, Cecilia C Russell, Jennette A Sakoff, Adam McCluskey
Bolinaquinone is a natural product that is a structurally complex, cytotoxic sesquiterpene quinone. A scaffold simplification and focused library approach using a microwave-assisted Suzuki coupling gave 32 bolinaquinone analogues with good-to-excellent cytotoxicity profiles. Mono-arylbenzoquinones, Library A , were preferentially toxic towards BE2-C (neuroblastoma) cells with growth inhibition (GI50 ) values of 4-12 µM; only the 3,4-dimethoxyphenyl 23 and 3-biphenyl 28 variants were broad-spectrum active-HT29 (colon carcinoma), U87 and SJ-G2 (glioblastoma), MCF-7 (breast carcinoma), A2780 (ovarian carcinoma), H460 (lung carcinoma), A431 (skin carcinoma), Du145 (prostate carcinoma), BE2-C (neuroblastoma), MIA (pancreatic carcinoma) and SMA (spontaneous murine astrocytoma)...
April 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29765361/biodiversity-of-environmental-leptospira-improving-identification-and-revisiting-the-diagnosis
#16
Roman Thibeaux, Dominique Girault, Emilie Bierque, Marie-Estelle Soupé-Gilbert, Anna Rettinger, Anthony Douyère, Michael Meyer, Gregorio Iraola, Mathieu Picardeau, Cyrille Goarant
Leptospirosis is an important environmental disease and a major threat to human health causing at least 1 million clinical infections annually. There has recently been a growing interest in understanding the environmental lifestyle of Leptospira . However, Leptospira isolation from complex environmental samples is difficult and time-consuming and few tools are available to identify Leptospira isolates at the species level. Here, we propose a polyphasic isolation and identification scheme, which might prove useful to recover and identify environmental isolates and select those to be submitted to whole-genome sequencing...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29763560/on-the-mechanism-of-ti-catalyzed-oxidative-nitrene-transfer-in-2-2-1-pyrrole-synthesis-from-alkynes-and-azobenzene
#17
Zachary W Davis-Gilbert, Xuelan Wen, Jason D Goodpaster, Ian A Tonks
A combined computational and experimental study on the mechanism of Ti-catalyzed formal [2+2+1] pyrrole synthesis from alkynes and aryl diazenes is reported. This reaction proceeds through a formally Ti(II)/Ti(IV) redox catalytic cycle as determined by natural bond orbital (NBO) and intrinsic bond orbital (IBO) analysis. Kinetic analysis of the reaction of internal alkynes with azobenzene reveals a complex equilibria involving Ti=NPh monomer/dimer equilibrium, Ti=NPh + alkyne [2+2] cycloaddition equilibrium, along with azobenzene and pyridine inhibition equilibria prior to rate determining 2nd alkyne insertion...
May 15, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29763433/injury-and-death-during-the-isis-occupation-of-mosul-and-its-liberation-results-from-a-40-cluster-household-survey
#18
Riyadh Lafta, Maha A Al-Nuaimi, Gilbert Burnham
BACKGROUND: Measurement of mortality and injury in conflict situations presents many challenges compared with stable situations. However, providing information is important to assess the impact of conflict on populations and to estimate humanitarian needs, both in the immediate and longer term. Mosul, Iraq's second largest city, was overrun by fighters of the Islamic State of Iraq and Syria (ISIS) on June 4, 2014. In this study, we conducted household surveys to measure reported deaths, injuries, and kidnappings in Mosul, Iraq, both during the occupation of the city by fighters of ISIS and the months of Iraqi military action known as the liberation...
May 2018: PLoS Medicine
https://www.readbyqxmd.com/read/29762127/electrospun-fiber-surface-nanotopography-influences-astrocyte-mediated-neurite-outgrowth
#19
Christopher D Johnson, Anthony R D'Amato, Devan L Puhl, Douglas M Wich, Amanda Vespermann, Ryan J Gilbert
Aligned, electrospun fiber scaffolds provide topographical guidance for regenerating neurons and glia after central nervous system injury. To date, no study has explored how fiber surface nanotopography affects astrocyte response to fibrous scaffolds. Astrocytes play important roles in the glial scar, the blood brain barrier, and in maintaining homeostasis in the central nervous system. In this study, electrospun poly L-lactic acid fibers were engineered with smooth, pitted, or divoted surface nanotopography...
May 15, 2018: Biomedical Materials
https://www.readbyqxmd.com/read/29761597/the-mycobacterium-tuberculosis-complex-has-a-pathway-for-the-biosynthesis-of-4-formamido-4-6-dideoxy-d-glucose
#20
Haley A Brown, Evgeny Vinogradov, Michel Gilbert, Hazel M Holden
Recent studies have demonstrated that the O-antigens of some pathogenic bacteria such as Brucella abortus, Francisella tularensis, and Campylobacter jejuni contain quite unusual N-formylated sugars (3-formamido-3,6-dideoxy-d-glucose or 4-formamido-4,6-dideoxy-d-glucose). Typically, four enzymes are required for the formation of such sugars: a thymidylyltransferase, a 4,6-dehydratase, a pyridoxal 5'-phosphate or PLP-dependent aminotransferase, and an N-formyltransferase. To date, there have been no published reports of N-formylated sugars associated with Mycobacterium tuberculosis...
May 15, 2018: Protein Science: a Publication of the Protein Society
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