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https://www.readbyqxmd.com/read/29786859/synergistic-effects-of-abiotic-stresses-in-plants-a-case-study-of-nitrogen-limitation-and-saturating-light-intensity-in-arabidopsis-thaliana
#1
Itay Cohen, Tal Rapaport, Vered Chalifa-Caspi, Shimon Rachmilevitch
Under natural conditions, plants are regularly exposed to combinations of stress factors. A common example is the conjunction between nitrogen (N) deficiency and excess light. The combined effect of stress factors is often ignored in studies using controlled conditions, possibly resulting in misleading conclusions. To address this issue, the current study examined the physiological behavior of Arabidopsis thaliana under the effect of varying nitrogen levels and light intensities. The joint influence of low N and excess light had an adverse effect on plant growth, chlorophyll and anthocyanin concentrations, photochemical capacity, and the abundance of proteins involved in carbon assimilation and anti-oxidative metabolism...
May 22, 2018: Physiologia Plantarum
https://www.readbyqxmd.com/read/29786465/trunk-stability-enabled-by-non-invasive-spinal-electrical-stimulation-after-spinal-cord-injury
#2
Mrinal Rath, Albert H Vette, Shyamsundar Ramasubramaniam, Kun Li, Joel Burdick, Victor Reggie Edgerton, Yury Gerasimenko, Dimitry Sayenko
Electrical neuromodulation of spinal networks improves the control of movement of the paralyzed limbs after spinal cord injury (SCI). However, the potential of non-invasive spinal stimulation to facilitate postural trunk control during sitting in humans with SCI has not been investigated. We hypothesized that transcutaneous electrical stimulation of the lumbosacral enlargement can improve trunk posture. Eight participants with non-progressive SCI, C3-T9, AIS A or C, performed different motor tasks during sitting...
May 22, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29786038/a-predictive-model-for-estimation-risk-of-proliferative-lupus-nephritis
#3
Dong-Ni Chen, Li Fan, Yu-Xi Wu, Qian Zhou, Wei Chen, Xue-Qing Yu
Background: Lupus nephritis (LN) is classified by renal biopsy into proliferative and nonproliferative forms, with distinct prognoses, but renal biopsy is not available for every LN patient. The present study aimed to establish an alternate tool by building a predictive model to evaluate the probability of proliferative LN. Methods: In this retrospective cohort with biopsy-proven LN, 382 patients in development cohort, 193 in internal validation cohort, and 164 newly diagnosed patients in external validation cohort were selected...
June 5, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29785590/clinical-application-of-a-minimally-invasive-cement-augmentable-schanz-screw-rod-system-to-treat-pelvic-ring-fractures
#4
Paul Schmitz, Florian Baumann, Yves P Acklin, Boyko Gueorguiev, Michael Nerlich, Stephan Grechenig, Michael Bernd Müller
PURPOSE: The purpose of this study is to analyze the results using the USS fracture MIS system (DePuy Synthes) to treat instable pelvic ring fractures. As its outstanding feature, it is the only Schanz screw and rod system at present that combines angular stability, perforation/fenestration of the screws for cement-augmentation, a variable screw length, and a large screw diameter. MATERIALS AND METHODS: Retrospective investigation of 134 pelvic ring fractures treated in 2012-2013...
May 21, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29785418/regioselective-ortho-functionalization-of-bromofluorenecarbaldehydes-using-tmpmgcl%C3%A2-licl
#5
Dominik Göbel, Nils Clamor, Boris J Nachtsheim
A highly regioselective functionalization of 7-bromofluorene-2-carbaldehydes, potent organic chromophores, in position C3 using a mild ortho-metallation strategy (DoM) with TMPMgCl·LiCl has been developed. This approach allows the preparation of highly functionalized fluorene derivatives by conversion of the in situ generated metalated species with various electrophiles giving a fast access to novel organic phosphorescent dyes.
May 22, 2018: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29785189/the-investigation-of-the-effect-and-mechanism-of-sophora-moorcroftiana-alkaloids-in-combination-with-albendazole-on-echinococcosis-in-an-experimental-rats-model
#6
Fabin Zhang, Chunhui Hu, Shilei Cheng, Shulin Wang, Bin Li, Deping Cao, Haining Fan, Ruchong Pan, Mei Yang, Yanhui Xu
Echinococcosis is a worldwide anthropozoonosis which is highly endemic over large animal husbandry areas in northwestern China. The current clinical therapeutic medicine against echinococcosis is albendazole, although it caused serious side effects in patients. The component in traditional Chinese herb medicine, Sophora moorcroftiana alkaloids (SA), is thought to be a potential drug to treat echinococcosis. In order to explore the effect and mechanism of SA treatment against echinococcosis, we established animal echinococcosis model and treated rats with albendazole alone, alkaloids alone, and combined therapy...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29784982/the-palaeoecological-context-of-the-oldowan-acheulean-in-southern-africa
#7
Michaela Ecker, James S Brink, Lloyd Rossouw, Michael Chazan, Liora K Horwitz, Julia A Lee-Thorp
The influence of climatic and environmental change on human evolution in the Pleistocene epoch is understood largely from extensive East African stable isotope records. These records show increasing proportions of C4 plants in the Early Pleistocene. We know far less about the expansion of C4 grasses at higher latitudes, which were also occupied by early Homo but are more marginal for C4 plants. Here we show that both C3 and C4 grasses and prolonged wetlands remained major components of Early Pleistocene environments in the central interior of southern Africa, based on enamel stable carbon and oxygen isotope data and associated faunal abundance and phytolith evidence from the site of Wonderwerk Cave...
May 21, 2018: Nature Ecology & Evolution
https://www.readbyqxmd.com/read/29784857/cytosolic-delivery-of-multi-domain-cargos-by-the-n-terminus-of-pasteurella-multocida-toxin
#8
Nathan C Clemons, Yuka Bannai, Elizabeth E Haywood, Yiting Xu, James D Buschbach, Mengfei Ho, Brenda A Wilson
The zoonotic pathogen Pasteurella multocida produces a 146-kDa modular toxin (PMT) that enters host cells and manipulates intracellular signaling through action on its Gα-protein targets. The N-terminus of PMT (PMT-N) mediates cellular uptake through receptor-mediated endocytosis, followed by delivery of the C-terminal catalytic domain from acidic endosomes into the cytosol. The putative native cargo of PMT consists of a 710-residue polypeptide of three distinct modular subdomains (C1-C2-C3), where C1 contains a membrane localization domain (MLD), C2 has as-of-yet undefined function, and C3 catalyzes deamidation of a specific active-site glutamine residue in Gα-protein targets...
May 21, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29784613/cryoglobulinemic-glomerulonephritis-associated-with-nodal-and-renal-infiltration-by-t-cell-lymphoma-of-t-follicular-helper-phenotype-a-case-report
#9
Jennifer Li, Marille Umakanathan, Chow Heok P'ng, Winny Varikatt, Fiona Kwok, Ming-Wei Lin, Mirna Vucak-Dzumhur
We present a unique case of cryoglobulinemic glomerulonephritis associated with nodal and renal infiltration by T-cell lymphoma of T-follicular helper phenotype. The patient presented with transient neurologic symptoms, severe nephritic syndrome with nephrotic-range proteinuria, and acute kidney injury. He had elevated double-stranded DNA levels, low complement levels, detectable cryoglobulin, and detectable immunoglobulin M (IgM) paraprotein. The kidney biopsy showed cryoglobulinemic glomerulonephritis with a membranoproliferative pattern and diffuse interstitial infiltrates on light microscopy; IgM, C3 but weak IgG, C1q, and negative C4d staining on immunofluorescence; and deposits with organized substructures on electron microscopy...
May 18, 2018: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/29783013/multiple-hereditary-exostoses-with-tetraparesis-due-to-cervical-spine-osteochondroma
#10
Ali Akhaddar, Mohamed Zyani, Issam Rharrassi
This is a case report about a 34-year-old man with hereditary multiple exostoses presented with gradual tetraparesis. Neuroimaging evaluation revealed an important posterior spinal cord compression by a C3 bony formation. Following posterior microsurgical decompression, the patient recovered nearly completely. Histopathological examination of the intraspinal lesion confirmed the diagnosis of benign osteochondroma. The patient returned to a normal life without evidence of recurrence at 2-year follow-up.
May 18, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29782306/urticarial-lesions-in-a-pregnant-woman
#11
Sergio Santos-Alarcón, Cesar Benavente-Villegas, Isabel García-Briz, Magdalena Moneva-Léniz, Celia Sanchis-Sánchez, Almudena Mateu-Puchades
Dear Editor, Gestational pemphigoid (GP) is a rare autoimmune bullous dermatosis in pregnancy. GP usually occurs during the second or third month of pregnancy. It clinically manifests as the development of either early-onset urticarial lesions or late-onset subepidermal blisters that may linger for weeks or even months. Herein we report the case of a 45-year-old woman with the distinctive clinical onset of GP. A forty-five-year-old woman, gravida I, para 0, at 27 weeks gestation, was referred for evaluation to our Department with an extensive pruritic eruption that had developed over the previous 7 days...
April 2018: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/29781609/enhancement-and-analysis-of-human-anti-aflatoxin-b1-afb1-scfv-antibody-ligand-interaction-using-chain-shuffling
#12
Kuntalee Rangnoi, Kiattawee Choowongkomon, Richard O'Kennedy, Florian Rüker, Montarop Yamabhai
A human anti-aflatoxin B1 (AFB1) scFv antibody (yAFB1-c3), selected from a naïve human phage-displayed scFv library, was used as a template for improving and analysis of antibody-ligand interactions using the chain-shuffling technique. The variable heavy and variable light (VH/VL) shuffled library was constructed from the VH of 25 pre-selected clones recombined with the VL of yAFB1-c3 and vice versa. Affinity selection from these library demonstrated that the VH domain played an important role in the binding of scFv to free AFB1...
May 21, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29781266/total-synthesis-of-laingolide-b-stereoisomers-and-assignment-of-absolute-configuration
#13
Chengsen Cui, Wei-Min Dai
Total synthesis of (-)-(2 R,9 S)- and (+)-(2 S,9 S)-stereoisomers of laingolide B has been accomplished by using sequential ring-closing metathesis (RCM) and alkene isomerization to construct the macrocyclic trans- N-methyl enamide moiety. The Myers alkylation was used to secure the C2 stereochemistry of the two RCM precursors from a common (9 S)-C3-C9 alkyl iodide. The absolute configuration of laingolide B has been assigned as (2 S,9 R) by comparison of the optical rotation data.
May 21, 2018: Organic Letters
https://www.readbyqxmd.com/read/29780508/identifying-key-descriptors-in-surface-binding-interplay-of-surface-anchoring-and-intermolecular-interactions-for-carboxylates-on-au-110
#14
Christopher R O'Connor, Fanny Hiebel, Wei Chen, Efthimios Kaxiras, Robert J Madix, Cynthia M Friend
The relative stability of carboxylates on Au(110) was investigated as part of a comprehensive study of adsorbate binding on Group IB metals that can be used to predict and understand how to control reactivity in heterogeneous catalysis. The binding efficacy of carboxylates is only weakly dependent on alkyl chain length for relatively short-chain molecules, as demonstrated using quantitative temperature-programmed reaction spectroscopy. Corresponding density functional theory (DFT) calculations demonstrated that the bidentate anchoring geometry is rigid and restricts the amount of additional stabilization through adsorbate-surface van der Waals (vdW) interactions which control stability for alkoxides...
April 21, 2018: Chemical Science
https://www.readbyqxmd.com/read/29780055/postoperative-neck-symptoms-of-posterior-approach-for-cervical-compressive-myelopathy-expansive-open-door-laminoplasty-vs-segmental-partial-laminectomy
#15
Koji Otani, Masumi Iwabuchi, Katsuhiko Sato, Shinichi Konno, Shinichi Kikuchi
BACKGROUND: Laminoplasty is widely accepted as a standard treatment of cervical compressive myelopathy. However, due to the risk of postoperative complications such as neck symptoms, segmental partial laminectomy (SPL) is performed instead, which results in fewer postoperative symptoms. The aim of this study was to describe the difference in the incidence and severity of postoperative neck symptoms between traditional C3-C7 expansive open-door laminoplasty (ELAP) and SPL. METHODS: A retrospective and comparative study was performed regarding neck complications following the two surgical procedures...
May 18, 2018: Fukushima Journal of Medical Science
https://www.readbyqxmd.com/read/29779382/specific-stereoisomeric-conformations-determine-the-drug-potency-of-cladosporin-scaffold-against-malarial-parasite
#16
Pronay Das, Palak Babbar, Nipun Malhotra, Manmohan Sharma, Gorakhnath R Jachak, Rajesh G Gonnade, Dhanasekaran Shanmugam, Karl Harlos, Manickam Yogavel, Amit Sharma, D Srinivasa Reddy
The dependence of drug potency on diastereomeric configurations is a key facet. Using a novel general divergent synthetic route for a three-chiral centre anti-malarial natural product cladosporin, we built its complete library of stereoisomers (cladologs) and assessed their inhibitory potential using parasite-, enzyme- and structure-based assays. We show that potency is manifest via tetrahyropyran ring conformations that are housed in the ribose binding pocket of parasite lysyl tRNA synthetase (KRS). Strikingly, drug potency between top and worst enantiomers varied 500-fold, and structures of KRS-cladolog complexes reveal that alterations at C3 and C10 are detrimental to drug potency where changes at C3 are sensed by rotameric flipping of Glutamate332...
May 21, 2018: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29778932/dynamics-of-paralytic-shellfish-toxins-and-their-metabolites-during-timecourse-exposure-of-scallops-chlamys-farreri-and-mussels-mytilus-galloprovincialis-to-alexandrium-pacificum
#17
Jiangbing Qiu, Fanping Meng, Ling Ding, Yijia Che, Pearse McCarron, Daniel G Beach, Aifeng Li
New C-11 hydroxyl metabolites of paralytic shellfish toxins (PSTs) have been reported in shellfish. To gain further information on these metabolites, as well as the potential for formation of phase-II metabolites and acyl esters of PSTs, bivalves were fed with the PSTs-producing dinoflagellate Alexandrium pacificum (strain ATHK). Through independent experiments, scallops (Chlamys farreri) were fed for 9 days and mussels (Mytilus galloprovincialis) for 5 days plus an additional 5 days of depuration, with representative samples taken throughout...
May 16, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29778797/discovery-of-potent-%C3%AE-glucosidase-inhibitor-flavonols-insights-into-mechanism-of-action-through-inhibition-kinetics-and-docking-simulations
#18
Didem Şöhretoğlu, Suat Sari, Burak Barut, Arzu Özel
Beside other pharmaceutical benefits, flavonoids are known for their potent α-glucosidase inhibition. In the present study, we investigated α-glucosidase inhibitory effects of structurally related 11 flavonols, among which quercetin-3-O-(3″-O-galloyl)-β-galactopyranoside (8) and quercetin 3-O-(6″-O-galloyl)-β-glucopyranoside (9) showed significant inhibition compared to the positive control, acarbose, with IC50 values of 0.97 ± 0.02 and 1.35 ± 0.06 µM, respectively. It was found that while sugar substitution to C3-OH of C ring reduced the α-glucosidase inhibitory effect, galloyl substitution to these sugar units increased it...
May 17, 2018: Bioorganic Chemistry
https://www.readbyqxmd.com/read/29778608/technical-success-and-long-term-results-with-excluder-c3-endoprosthesis-in-narrow-aortic-biforcations-first-italian-multicentre-experience
#19
Gian Franco Veraldi, Luca Mezzetto, Filippo Vaccher, Lorenzo Scorsone, Stefano Bonvini, Igor Raunig, Valentina Wassermann, Sebastiano Tasselli
PURPOSE: This study aims at evaluating technical success and long-term results using Gore Excluder/C3 endoprosthesis in patients with narrow aortic bifurcation (NAB, inner-inner aortic diameter <18mm). METHODS: Clinical and anatomical data were collected retrospectively from patients treated in two high-volume Italian vascular centres between 2005 and 2017. A total of 1325 EVAR procedures were performed: 195 involved Excluder/C3 Gore endoprosthesis. 141 patients had a regular aortic bifurcation (RAB, maximum inner-inner diameter ≥ 18mm), while 54 presented NAB (< 18mm)...
May 17, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29778480/relationship-between-herd-size-and-measures-of-animal-welfare-on-dairy-cattle-farms-with-freestall-housing-in-germany
#20
Daniel Gieseke, Christian Lambertz, Matthias Gauly
The objective of this study was to examine the association of herd size with animal welfare in dairy cattle herds. Therefore, 80 conventional dairy cattle farms were classified by the number of cows into 4 herd size classes, C1 (<100 cows), C2 (100-299 cows), C3 (300-499 cows), and C4 (≥500 cows), and assessed using multiple animal-based measures of the Welfare Quality Assessment protocol for dairy cattle. Data were recorded from April 2014 to September 2016 by an experienced single assessor in Northern Germany...
May 16, 2018: Journal of Dairy Science
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