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https://www.readbyqxmd.com/read/28646084/a-novel-mechanism-linked-to-cell-density-largely-controls-cell-division-in-synechocystis
#1
Alberto A Esteves-Ferreira, Masami Inaba, Toshihiro Obata, Antoine Fort, Gerard Fleming, Wagner L Araújo, Alisdair R Fernie, Ronan Sulpice
Many studies have investigated the various genetic and environmental factors regulating cyanobacterial growth. Here, we investigated the growth and metabolism of Synechocystis sp. PCC 6803, under different nitrogen sources, light intensities and CO2 concentrations. Cells grown on urea showed the highest growth rates. However, for all the conditions, the daily growth rates in batch cultures decreased steadily over time, and stationary phase was obtained with similar cell densities. Unexpectedly, metabolic and physiological analyses showed that growth rates during log phase were not primarily controlled by the availability of photoassimilates...
June 23, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28644996/neural-correlates-of-psychotic-like-experiences-during-spiritual-trance-state
#2
Alessandra Ghinato Mainieri, Julio Fernando Prieto Peres, Alexander Moreira-Almeida, Klaus Mathiak, Ute Habel, Nils Kohn
Recent studies indicate high levels of psychotic experiences in the general population. Here, we report a functional imaging study with 8 mentally healthy spiritual mediums and 8 matched controls. The mediums entered a mediumistic-trance state using a standardized manner by closing their eyes and actively seeking to ignore external and internal stimuli to achieve a 'state of emptiness'; in a control condition, they were instructed to re-enact the same mediumistic experience that they had during the mediumistic-trance condition but in a non-trance state (imaginative-trance)...
June 15, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28635593/the-protein-slr1143-is-an-active-diguanylate-cyclase-in-synechocystis-sp-pcc-6803-and-interacts-with-the-photoreceptor-cph2
#3
Veronika Angerer, Philipp Schwenk, Thomas Wallner, Volkhard Kaever, Andreas Hiltbrunner, Annegret Wilde
Cyclic-di-GMP is an ubiquitous second messenger in bacteria. Several c-di-GMP receptor proteins have been identified to date, and downstream signalling pathways are often mediated through protein-protein interactions. The photoreceptor Cph2 from the cyanobacterium Synechocystis sp. PCC 6803 comprises three domains related to c-di-GMP metabolism: two GGDEF and one EAL domain. It has been shown that the C-terminal GGDEF domain acts as blue-light triggered c-di-GMP producer thereby inhibiting motility of the cells in blue light...
June 21, 2017: Microbiology
https://www.readbyqxmd.com/read/28635130/prothrombin-complex-concentrate-for-emergent-reversal-of-warfarin-an-international-survey-of-hospital-protocols
#4
J Gorlin, S Kinney, M K Fung, A Tinmouth
For emergent warfarin reversal, four-factor prothrombin complex concentrates (4FPCCs) are recommended by many international guidelines. We surveyed international clinical sites including members of the Biomedical Excellence for Safer Transfusion (BEST) Collaborative. Most sites have emergent warfarin reversal protocols (53% use PCC, 25% use PCC+ plasma and 2% use plasma alone); however, variation between adjusted dosing and fixed dosing was observed.
June 21, 2017: Vox Sanguinis
https://www.readbyqxmd.com/read/28634584/effect-of-chitosan-edible-coating-on-the-biochemical-and-physical-characteristics-of-carp-fillet-cyprinus-carpio-stored-at-18%C3%A2-c
#5
Ana Gabriela Morachis-Valdez, Leobardo Manuel Gómez-Oliván, Imelda García-Argueta, María Dolores Hernández-Navarro, Daniel Díaz-Bandera, Octavio Dublán-García
The effect of an edible coating (EC) with 1.5% chitosan as an additive, on common carp (Cyprinus carpio) fillet, was determined evaluating the biochemical, physicochemical, textural, microbiological, and nutritional characteristics periodically during its storage in the freezer (-18°C), observing a decrease in the rate of biochemical reactions related to degradation (p < 0.05), hydroperoxides content (HPC) (0.8324 nM hydroperoxides/mg of protein versus 0.5540 nM/mg with regard to the EC sample), as well as protein carbonyl content (PCC) (0...
2017: International journal of food science
https://www.readbyqxmd.com/read/28626012/pharmacological-modulation-of-noradrenergic-arousal-circuitry-disrupts-functional-connectivity-of-the-locus-coeruleus-in-humans
#6
Andrew H Song, Aaron Kucyi, Vitaly Napadow, Emery N Brown, Marco L Loggia, Oluwaseun Akeju
State dependent activity of locus coeruleus (LC) neurons has long suggested a role for noradrenergic modulation of arousal. However, in vivo insights into noradrenergic arousal circuitry have been constrained by the fundamental inaccessibility of the human brain for invasive studies. Functional magnetic resonance imaging (fMRI) studies performed during site-specific pharmacological manipulations of arousal levels may be used to study brain arousal circuitry. Dexmedetomidine is an anesthetic that alters the level of arousal by selectively targeting α2 adrenergic receptors on LC neurons, resulting in reduced firing rate and norepinephrine release...
June 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28622477/an-examination-of-factors-affecting-the-length-of-stay-in-a-palliative-care-center
#7
Metin Dincer, Kadriye Kahveci, Cihan Doger
BACKGROUND: With the increase in elderly population, life-threatening chronic diseases are increasing, simultaneously increasing the need for palliative care centers (PCCs). OBJECTIVES: To evaluate the factors affecting the length of stay (LOS) and discharge of patients from a PCC. METHODS: A retrospective scan was made of the records of patients followed up in the PCC between January 2013 and March 2016. A record was made of patient age, gender, diagnosis, conditions/comorbidities, Glasgow Coma Scale, Karnofsky Performance Scale, LOS, prognosis (exitus or surviving), percutaneous endoscopic gastrostomy (PEG), tracheostomy, mechanical ventilator, nutrition (total parenteral nutrition [TPN] or enteral nutrition), and the results of cultures taken during stay in PCCs (blood, tracheal aspirate, urine, rectal swab, wound)...
June 16, 2017: Journal of Palliative Medicine
https://www.readbyqxmd.com/read/28620360/cytr-homolog-of-pectobacterium-carotovorum-subsp-carotovorum-controls-air-liquid-biofilm-formation-by-regulating-multiple-genes-involved-in-cellulose-production-c-di-gmp-signaling-motility-and-type-iii-secretion-system-in-response-to-nutritional-and-environmental
#8
M M Haque, M M H Oliver, Kamrun Nahar, Mohammad Z Alam, Hisae Hirata, Shinji Tsuyumu
Pectobacterium carotovorum subsp. carotovorum [Pcc (formerly Erwinia carotovora subsp. carotovora)] PC1 causes soft-rot disease in a wide variety of plant species by secreting multiple pathogenicity-related traits. In this study, regulatory mechanism of air-liquid (AL) biofilm formation was studied using a cytR homolog gene deletion mutant (ΔcytR) of Pcc PC1. Compared to the wild type (Pcc PC1), the ΔcytR mutant produced fragile and significantly (P < 0.001) lower amounts of AL biofilm on salt-optimized broth plus 2% glycerol (SOBG), yeast peptone dextrose adenine, and also on King's B at 27°C after 72 h incubation in static condition...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28618360/the-distribution-of-phosphorus-and-its-transformations-during-batch-growth-of-synechocystis
#9
Yun Zhou, Binh T Nguyen, Chen Zhou, Levi Straka, YenJung Sean Lai, Siqing Xia, Bruce E Rittmann
Phosphorus (P) is an essential nutrient that affects the growth and metabolism of microalgal biomass. Despite the obvious importance of P, the dynamics of how it is taken up and distributed in microalgae are largely undefined. In this study, we tracked the fate of P during batch growth of the cyanobacterium Synechocystis sp. PCC 6803. We determined the distribution of P in intracellular polymeric substances (IPS), extracellular polymeric substances (EPS), and soluble microbial products (SMP) for three initial ortho-phosphate concentrations...
June 9, 2017: Water Research
https://www.readbyqxmd.com/read/28616381/anosognosia-for-memory-deficits-in-mild-cognitive-impairment-insight-into-the-neural-mechanism-using-functional-and-molecular-imaging
#10
Patrizia Vannini, Bernard Hanseeuw, Catherine E Munro, Rebecca E Amariglio, Gad A Marshall, Dorene M Rentz, Alvaro Pascual-Leone, Keith A Johnson, Reisa A Sperling
Anosognosia, or loss of insight of memory deficits, is a common and striking symptom in Alzheimer's disease (AD). Previous findings in AD dementia patients suggest that anosognosia is due to both functional metabolic changes within cortical midline structures involved in self-referential processes, as well as functional disconnection between these regions. The present study aims to extend these findings by investigating the neural correlates of anosognosia in the prodromal stage of AD. Here, we used regional brain metabolism (resting state 18-F fluorodeoxyglucose positron emission tomography (FDG-PET)) to unravel the metabolic correlates of anosognosia in subjects with amnestic mild cognitive impairment (aMCI) and subsequently resting state functional magnetic resonance imaging (rs-fMRI) to investigate the intrinsic connectivity disruption between brain regions...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28615524/interleukin-15-stimulates-natural-killer-cell-mediated-killing-of-both-human-pancreatic-cancer-and-stellate-cells
#11
Jonas R M Van Audenaerde, Jorrit De Waele, Elly Marcq, Jinthe Van Loenhout, Eva Lion, Johan M J Van den Bergh, Ralf Jesenofsky, Atsushi Masamune, Geert Roeyen, Patrick Pauwels, Filip Lardon, Marc Peeters, Evelien L J Smits
Pancreatic ductal adenocarcinoma (PDAC) is the 4th leading cause of cancer-related death in Western countries with a 5-year survival rate below 5%. One of the hallmarks of this cancer is the strong desmoplastic reaction within the tumor microenvironment (TME), orchestrated by activated pancreatic stellate cells (PSC). This results in a functional and mechanical shield which causes resistance to conventional therapies. Aiming to overcome this resistance by tackling the stromal shield, we assessed for the first time the capacity of IL-15 stimulated natural killer (NK) cells to kill PSC and pancreatic cancer cells (PCC)...
May 25, 2017: Oncotarget
https://www.readbyqxmd.com/read/28612131/three-factor-versus-four-factor-prothrombin-complex-concentrate-for-the-emergent-management-of-warfarin-associated-intracranial-hemorrhage
#12
Daniel Fischer, Jeffrey Sorensen, Gabriel V Fontaine
BACKGROUND: Four-factor prothrombin complex concentrates (PCC) produce a more rapid and complete INR correction compared with 3-factor PCC in patients receiving warfarin. It is unknown if this improves clinical outcomes in the setting of intracranial hemorrhage (ICH). METHODS: This multicenter, retrospective cohort study included patients presenting with warfarin-associated ICH reversed with either 4- or 3-factor PCC. The primary outcome was in-hospital mortality...
June 13, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28607684/a-multifaceted-quality-improvement-programme-to-improve-acute-kidney-injury-care-and-outcomes-in-a-large-teaching-hospital
#13
Leonard Ebah, Prasanna Hanumapura, Deryn Waring, Rachael Challiner, Katharine Hayden, Jill Alexander, Robert Henney, Rachel Royston, Cassian Butterworth, Marc Vincent, Susan Heatley, Ged Terriere, Robert Pearson, Alastair Hutchison
Acute kidney injury (AKI) is now widely recognised as a serious health care issue, occurring in up to 25% of hospital in-patients, often with worsening of outcomes. There have been several reports of substandard care in AKI. This quality improvement (QI) programme aimed to improve AKI care and outcomes in a large teaching hospital. Areas of documented poor AKI care were identified and specific improvement activities implemented through sequential Plan-Do-Study-Act (PDSA) cycles. An electronic alert system (e-alert) for AKI was developed, a Priority Care Checklist (PCC) was tested with the aid of specialist nurses whilst targeted education activities were carried out and data on care processes and outcomes monitored...
2017: BMJ Quality Improvement Reports
https://www.readbyqxmd.com/read/28606207/utilizing-a-pediatric-disaster-coalition-model-to-increase-pediatric-critical-care-surge-capacity-in-new-york-city
#14
Michael Frogel, Avram Flamm, Mayer Sagy, Katharine Uraneck, Edward Conway, Michael Ushay, Bruce M Greenwald, Louisdon Pierre, Vikas Shah, Mohamed Gaffoor, Arthur Cooper, George Foltin
A mass casualty event can result in an overwhelming number of critically injured pediatric victims that exceeds the available capacity of pediatric critical care (PCC) units, both locally and regionally. To address these gaps, the New York City (NYC) Pediatric Disaster Coalition (PDC) was established. The PDC includes experts in emergency preparedness, critical care, surgery, and emergency medicine from 18 of 25 major NYC PCC-capable hospitals. A PCC surge committee created recommendations for making additional PCC beds available with an emphasis on space, staff, stuff (equipment), and systems...
June 13, 2017: Disaster Medicine and Public Health Preparedness
https://www.readbyqxmd.com/read/28605972/resting-state-connectivity-between-default-mode-network-and-insula-encodes-acute-migraine-headache
#15
Gianluca Coppola, Antonio Di Renzo, Emanuele Tinelli, Cherubino Di Lorenzo, Marco Scapeccia, Vincenzo Parisi, Mariano Serrao, Maurizio Evangelista, Anna Ambrosini, Claudio Colonnese, Jean Schoenen, Francesco Pierelli
Background Previous functional MRI studies have revealed that ongoing clinical pain in different chronic pain syndromes is directly correlated to the connectivity strength of the resting default mode network (DMN) with the insula. Here, we investigated seed-based resting state DMN-insula connectivity during acute migraine headaches. Methods Thirteen migraine without aura patients (MI) underwent 3 T MRI scans during the initial six hours of a spontaneous migraine attack, and were compared to a group of 19 healthy volunteers (HV)...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28605448/efficacy-of-peptide-receptor-radionuclide-therapy-prrt-for-functional-metastatic-paraganglioma-and-phaeochromocytoma
#16
Grace Kong, Simona Grozinsky-Glasberg, Michael S Hofman, Jason Callahan, Amichay Meirovitz, Ofra Maimon, David A Pattison, David J Gross, Rodney J Hicks
Purpose: Treatment options for unresectable Paraganglioma (PGL)/Phaeochromocytoma (PCC), especially with uncontrolled secondary hypertension (HTN) are limited. Preliminary studies with PRRT suggest efficacy but data on HTN control and survival are lacking. We assessed PRRT outcomes in such patients from 2 referral centres. Methods: 20 consecutive patients (M:F=13:7; 21-77y.o.) with high somatostatin receptor (SSTR) expression treated with 177Lu-DOTA-octreotate, 9 with radiosensitising chemotherapy, were retrospectively reviewed...
June 9, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28604569/use-of-four-factor-prothrombin-complex-concentrate-in-the-reversal-of-warfarin-induced-and-nonvitamin-k-antagonist-related-coagulopathy
#17
Hannah Young, Jeremy L Holzmacher, Richard Amdur, Stephen Gondek, Babak Sarani, Mary E Schroeder
: To evaluate the efficacy of international normalized ratio (INR) reversal using four-factor prothrombin complex concentrate (4F-PCC) in nonmedication-induced coagulopathy. We performed a single-site, retrospective cohort study of patients receiving off-label use of 4F-PCC. Cohorts included liver dysfunction if they had acute liver decompensation or cirrhosis without other causative factors of liver failure such as sepsis, coagulopathy of acute sepsis (CAS) if they had documentation of sepsis and no underlying liver disorder, known factor deficiencies, or medication-induced coagulopathy, or warfarin if they were taking warfarin...
June 9, 2017: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/28602483/a-hybrid-framework-for-reverse-engineering-of-robust-gene-regulatory-networks
#18
Mina Jafari, Behnam Ghavami, Vahid Sattari
The inference of Gene Regulatory Networks (GRNs) using gene expression data in order to detect the basic cellular processes is a key issue in biological systems. Inferring GRN correctly requires inferring predictor set accurately. In this paper, a fast and accurate predictor set inference framework which linearly combines some inference methods is proposed. The purpose of the combination of various methods is to increase the accuracy of inferred GRN. The proposed framework offers a linear weighted combination of Pearson Correlation Coefficient (PCC) and two different feature selection approaches, namely: Information Gain (IG) and ReliefF...
June 8, 2017: Artificial Intelligence in Medicine
https://www.readbyqxmd.com/read/28601005/the-isolated-twenty-three-residue-long-n-terminal-region-of-the-glutamine-synthetase-inactivating-factor-binds-to-its-target
#19
José L Neira, Francisco J Florencio, M Isabel Muro-Pastor
Glutamine synthetase (GS) catalyzes the ATP-dependent formation of glutamine from glutamate and ammonia. The activity of Synechocystis sp. PCC 6803 GS type I is regulated by protein-protein interactions with a 65-residue-long protein (IF7). IF7 binds initially to GS through residues at its N terminus. In this work, we studied the conformational preferences of the N-terminal region of IF7 (IF7pep, residues Ala7-Ala29), its binding to GS and its functional properties. Isolated IF7pep populated a nascent helix in aqueous solution...
June 1, 2017: Biophysical Chemistry
https://www.readbyqxmd.com/read/28600876/rerouting-of-carbon-flux-in-a-glycogen-mutant-of-cyanobacteria-assessed-via-isotopically-non-stationary-13-c-metabolic-flux-analysis
#20
John I Hendry, Charulata Prasannan, Fangfang Ma, K Benedikt Möllers, Damini Jaiswal, Madhuri Digmurti, Doug K Allen, Niels-Ulrik Frigaard, Santanu Dasgupta, Pramod P Wangikar
Cyanobacteria, which constitute a quantitatively dominant phylum, have attracted attention in biofuel applications due to favorable physiological characteristics, high photosynthetic efficiency and amenability to genetic manipulations. However, quantitative aspects of cyanobacterial metabolism have received limited attention. In the present study, we have performed isotopically non-stationary (13) C metabolic flux analysis (INST-(13) C-MFA) to analyze rerouting of carbon in a glycogen synthase deficient mutant strain (glgA-I glgA-II) of the model cyanobacterium Synechococcus sp...
June 10, 2017: Biotechnology and Bioengineering
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