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https://www.readbyqxmd.com/read/29150838/gi-530159-a-novel-selective-mechano-sensitive-k2p-channel-opener-reduces-rat-dorsal-root-ganglion-drg-neuron-excitability
#1
Alexandre J C Loucif, Pierre-Philippe Saintot, Jia Liu, Brett M Antonio, Shannon G Zellmer, Katrina Yoger, Emma L Veale, Anna Wilbrey, Kiyoyuki Omoto, Lishuang Cao, Alex Gutteridge, Neil A Castle, Edward B Stevens, Alistair Mathie
BACKGROUND AND PURPOSE: TREK two pore domain potassium channels play a critical role in regulating the excitability of somatosensory nociceptive neurons and are important mediators of pain perception. An understanding of the roles of TREK channels in pain perception and, indeed, in other pathophysiological conditions, has been severely hampered by the lack of potent and/or selective activators and inhibitors. In this study we describe a new, selective opener of TREK channels, GI-530159 (4,4'-(Hexafluoroisopropylidene)bis(p-phenyleneoxy)dianiline)...
November 18, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29150743/differential-response-of-neural-cells-to-trauma-induced-swelling-in-vitro
#2
A R Jayakumar, M Taherian, K S Panickar, N Shamaladevi, M E Rodriguez, B G Price, M D Norenberg
Brain edema and the associated increase in intracranial pressure are major consequences of traumatic brain injury (TBI) that accounts for most early deaths after TBI. We recently showed that acute severe trauma to cultured astrocytes results in cell swelling. We further examined whether trauma induces cell swelling in neurons and microglia. We found that severe trauma also caused cell swelling in cultured neurons, whereas no swelling was observed in microglia. While severe trauma caused cell swelling in both astrocytes and neurons, mild trauma to astrocytes, neurons, and microglia failed to cell swelling...
November 17, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/29150372/duration-of-group-a-streptococcus-pcr-positivity-following-antibiotic-treatment-of-pharyngitis
#3
Jason H Homme, Corryn S Greenwood, Lisa B Cronk, Lisa M Nyre, James R Uhl, Amy L Weaver, Robin Patel
BACKGROUND: Polymerase chain reaction (PCR) has high sensitivity and specificity for detection of group A streptococcus (GAS) in throat swabs and is routinely used for GAS pharyngitis diagnosis at our institution. Herein we defined the natural history of throat swab GAS PCR and culture positivity during and following treatment of GAS pharyngitis. METHODS: Fifty children with a PCR positive GAS throat swab were recruited for participation. Four additional throat swabs were collected over 2 weeks following the initial positive PCR result (during and following a standard course of antibiotic therapy) and tested for GAS using rapid real-time PCR and culture...
October 12, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29150282/artesunate-quercetin-luteolin-dual-drug-nanofacilitated-synergistic-treatment-for-malaria-a-plausible-approach-to-overcome-artemisinin-combination-therapy-resistance
#4
Nethravathi Puttappa, Raman Suresh Kumar, Karthik Yamjala
Malaria is one of the major global health challenge with 300 million new cases annually. The best regimen for treating Plasmodium falciparum induced malaria is based on artemisinin and its derivatives which were prescribed as artemisinin combination therapy (ACT). These are highly effective drugs resulting in rapid clearance of parasites even in severe P. falciparum induced malaria patients. However, from the past few years parasites resistant to ACT's have begun to emerge in various parts of the world such as Cambodia and Greater Mekong Subregion...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29150184/-glutamate-dehydrogenase-its-diagnostic-value-in-clostridioides-difficile-diarrhea
#5
Daniela Vaustat, Raquel Rollet
Clostridioides difficile is the main etiological agent of diarrhea associated with health care, it produces toxins and glutamate dehydrogenase (GDH), an enzyme that is highly conserved in this species. Rapid diagnosis and effective treatment produce prompt improvement of the patient and subsequent control of the microorganism spread. There are several techniques whose results are interpreted in the context of algorithms. However, the optimal diagnostic method is yet unknown. The performance of GDH as a screening test for the diagnosis of C...
November 14, 2017: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/29149549/workflow-for-target-oriented-parametrization-of-an-enhanced-mechanistic-cell-culture-model
#6
Sophia Ulonska, Paul Kroll, Jens Fricke, Christoph Clemens, Raphael Voges, Markus Michael Müller, Christoph Herwig
The goal of this study was to develop a macroscopic mechanistic model describing growth and production within fed-batch cultivations of CHO cells. The model should be used for process characterization as well as for process monitoring including real-time parameter adaptations. The model proved to be able to describe a data-set of 40 processes differing in clones, scales and process conditions with a normalized root mean square error of approximately 10%. However, due to limited parameter identifiability and limited knowledge about physiologically meaningful parameter values, a broad range of parameters could describe the data with similar quality...
November 17, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/29149169/the-role-of-allee-effect-in-modelling-post-resection-recurrence-of-glioblastoma
#7
Zoltan Neufeld, William von Witt, Dora Lakatos, Jiaming Wang, Balazs Hegedus, Andras Czirok
Resection of the bulk of a tumour often cannot eliminate all cancer cells, due to their infiltration into the surrounding healthy tissue. This may lead to recurrence of the tumour at a later time. We use a reaction-diffusion equation based model of tumour growth to investigate how the invasion front is delayed by resection, and how this depends on the density and behaviour of the remaining cancer cells. We show that the delay time is highly sensitive to qualitative details of the proliferation dynamics of the cancer cell population...
November 17, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/29148073/adaptation-and-validation-of-the-voices-sf-questionnaire-for-evaluation-of-end-of-life-care-in-sweden
#8
Anna O'Sullivan, Joakim Öhlen, Anette Alvariza, Cecilia Håkanson
OBJECTIVES: Instruments for evaluating end-of-life care by voicing experiences of family members have previously been lacking in Sweden. The objective of this study was therefore to adapt and validate the VOICES (SF) questionnaire to evaluate quality of end-of-life care in Sweden. The VOICES (SF) [Views of Informal Carers - Evaluation of Services (Short form)] is a questionnaire about bereaved relatives' experiences of care in the last three months of life of a deceased family member...
November 17, 2017: Scandinavian Journal of Caring Sciences
https://www.readbyqxmd.com/read/29146910/an-unexpected-protein-interaction-promotes-drug-resistance-in-leukemia
#9
Aaron Pitre, Yubin Ge, Wenwei Lin, Yao Wang, Yu Fukuda, Jamshid Temirov, Aaron H Phillips, Jennifer L Peters, Yiping Fan, Jing Ma, Amanda Nourse, Chandrima Sinha, Hai Lin, Richard Kriwacki, James R Downing, Tanja A Gruber, Victoria E Centonze, Anjaparavanda P Naren, Taosheng Chen, John D Schuetz
The overall survival of patients with acute myeloid leukemia (AML) is poor and identification of new disease-related therapeutic targets remains a major goal for this disease. Here we show that expression of MPP1, a PDZ-domain-containing protein, highly correlated with ABCC4 in AML, is associated with worse overall survival in AML. Murine hematopoietic progenitor cells overexpressing MPP1 acquired the ability to serially replate in methylcellulose culture, a property crucially dependent upon ABCC4. The highly conserved PDZ-binding motif of ABCC4 is required for ABCC4 and MPP1 to form a protein complex, which increased ABCC4 membrane localization and retention, to enhance drug resistance...
November 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/29146619/urinary-neutrophil-gelatinase-associated-lipocalin-for-the-diagnosis-of-urinary-tract-infections
#10
Tamar R Lubell, Jonathan M Barasch, Katherine Xu, Maria Ieni, Keven I Cabrera, Peter S Dayan
OBJECTIVES: To determine the accuracy of the novel biomarker urinary neutrophil gelatinase-associated lipocalin (uNGAL) to diagnose urinary tract infections (UTIs) in febrile infants and young children. METHODS: Prospective cross-sectional study of febrile infants <3 months ( ≥ 38.0°C) and children 3 to 24 months (≥ 39.0°C) evaluated for UTIs. uNGAL levels, urinalysis, Gram-stain and culture were obtained. UTI was defined by colony counts. RESULTS: Of 260 patients, 35 (13...
November 16, 2017: Pediatrics
https://www.readbyqxmd.com/read/29146504/minocycline-protects-developing-brain-against-ethanol-induced-damage
#11
Xin Wang, Kai Zhang, Fanmuyi Yang, Zhenhua Ren, Mei Xu, Jacqueline A Frank, Zun-Ji Ke, Jia Luo
Fetal alcohol spectrum disorders (FASD) are caused by ethanol exposure during the pregnancy and is the leading cause of mental retardation. Ethanol exposure during the development results in the loss of neurons in the developing brain, which may underlie many neurobehavioral deficits associated with FASD. It is important to understand the mechanisms underlying ethanol-induced neuronal loss and develop appropriate therapeutic strategies. One of the potential mechanisms involves neuroimmune activation. Using a third trimester equivalent mouse model of ethanol exposure, we demonstrated that ethanol induced a wide-spread neuroapoptosis, microglial activation, and neuroinflammation in C57BL/6 mice...
November 14, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29146425/unprecedented-sensitivity-of-the-planar-yeast-estrogen-screen-by-using-a-spray-on-technology
#12
Andreas Schoenborn, Pascal Schmid, Sarah Bräm, Georg Reifferscheid, Marina Ohlig, Sebastian Buchinger
The planar yeast estrogen screen (p-YES) can serve as a highly valuable and sensitive screening tool for the detection of estrogenic compounds in various sample matrices such as water and wastewater, personal care products and foodstuff. The method combines the separation of sample constituents by thin layer chromatography with the direct detection of estrogenic compounds on the surface of the HPTLC-plate. The previous protocol using the immersion of a normal phase silica HPTLC-plate in a cell suspension for bio-autography resulted in blurred signals due to the accelerated diffusion of compounds on the wet surface of the HPTLC-plate...
November 7, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29146399/label-free-discrimination-analysis-of-de-differentiated-vascular-smooth-muscle-cells-mesenchymal-stem-cells-and-their-vascular-and-osteogenic-progeny-using-vibrational-spectroscopy
#13
Claire Molony, Jennifer McIntyre, Adrian Maguire, Roya Hakimjavadi, Denise Burtenshaw, Gillian Casey, Mariana Di Luca, Bryan Hennelly, Hugh J Byrne, Paul A Cahill
The accumulation of vascular smooth muscle (SMC)-like cells and stem cell-derived myogenic and osteogenic progeny contributes significantly to arteriosclerotic disease. This study established whether label-free vibrational spectroscopy can discriminate de-differentiated 'synthetic' SMCs from undifferentiated stem cells and their myogenic and osteogenic progeny in vitro, compared with conventional immunocytochemical and genetic analyses. TGF-β1- and Jagged1-induced myogenic differentiation of CD44(+)mesenchymal stem cells was confirmed in vitro by immunocytochemical analysis of specific SMC differentiation marker expression (α-actin, calponin and myosin heavy chain 11), an epigenetic histone mark (H3K4me2) at the myosin heavy chain 11 locus, promoter transactivation and mRNA transcript levels...
November 13, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29145897/it-does-matter-where-you-come-from-mothers-experiences-of-childbirth-in-midwife-obstetric-units-tshwane-south-africa
#14
Sarie J Oosthuizen, Anne-Marie Bergh, Robert C Pattinson, Jackie Grimbeek
BACKGROUND: Health professionals are striving to improve respectful care for women, but they fall short in the domains of effective communication, respectful and dignified care and emotional support during labour. This study aimed to determine women's experiences of childbirth with a view to improving respectful clinical care practices in low-risk, midwife-led obstetric units in the Tshwane District Health District, South Africa. METHODS: A survey covering all midwife-led units in the district was conducted among 653 new mothers...
November 16, 2017: Reproductive Health
https://www.readbyqxmd.com/read/29145858/cognitive-appraisal-of-exposure-to-specific-types-of-trauma-a-study-of-gender-differences
#15
Dana-Cristina Herta, Bogdan Nemes, Doina Cozman
BACKGROUND: The role of gender in posttraumatic cognitions has increasingly been approached. The current study comparatively evaluates posttraumatic cognitions in men and women exposed to specific nonsexual trauma (motor vehicle accidents, work - related accidents, burns). METHODS: Posttraumatic cognitions and posttraumatic stress symptoms were comparatively assessed in 53 men and 37 women treated in 3 Romanian primary care units after specific accidental trauma...
November 16, 2017: BMC Women's Health
https://www.readbyqxmd.com/read/29145770/camptothecin-prodrug-nanomicelle-based-on-a-boronate-ester-linked-diblock-copolymer-as-the-carrier-of-doxorubicin-with-enhanced-cellular-uptake
#16
Ya Gao, Yi Xiao, Shiyuan Liu, Jiahui Yu
A novel pH-sensitive polymeric prodrug of camptothecin (CPT) by polymerizing γ-camptothecin-glutamate N-carboxyanhydride (Glu (CPT)-NCA) on boronate ester-linked poly (ethyleneglycol) (PEG) directly via the amine-initiated ring open polymerization (ROP) has been developed. The resulting amphiphilic prodrug (mPEG-BC-PGluCPT) could self-assemble into nanoparticles and encapsulate doxorubicin (Dox) simultaneously in aqueous solution for dual-drug delivery. The formation of polymeric prodrug micelles (mPEG-BC@PGluCPT) was confirmed by the measurements of critical aggregation concentration (CAC), particle size, and morphology observations...
November 17, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29145514/why-patients-with-thbd-c-1611c-a-p-cys537x-nonsense-mutation-have-high-levels-of-soluble-thrombomodulin
#17
Yohann Jourdy, Nathalie Enjolras, Sandra Le Quellec, Jean Claude Bordet, Claude Négrier, Christine Vinciguerra, Yesim Dargaud
BACKGROUND: Recently our group has described a new autosomal dominant bleeding disorder characterized by very high plasma levels of soluble thrombomodulin (TM). The THBD c.1611C>A (p.Cys537X) mutation in heterozygous state was found in the propositus. This mutation leads to the synthesis of a truncated TM which has lost the last three amino-acids of the transmembrane domain and the cytoplasmic tail. OBJECTIVE: We investigated the mechanism responsible for TM shedding in endothelial cells with THBD c...
2017: PloS One
https://www.readbyqxmd.com/read/29145424/levosimendan-protects-human-hepatocytes-from-ischemia-reperfusion-injury
#18
Stefanie N Brunner, Nicolai V Bogert, Andreas A Schnitzbauer, Eva Juengel, Anton Moritz, Isabella Werner, Angela Kornberger, Andres Beiras-Fernandez
BACKGROUND: Ischemia-reperfusion injury (IRI) is a major challenge in liver transplantation. The mitochondrial pathway plays a pivotal role in hepatic IRI. Levosimendan, a calcium channel sensitizer, was shown to attenuate apoptosis after IRI in animal livers. The aim of this study was to investigate the effect of levosimendan on apoptosis in human hepatocytes. METHODS: Primary human hepatocytes were either exposed to hypoxia or cultured under normoxic conditions...
2017: PloS One
https://www.readbyqxmd.com/read/29144965/role-of-serum-1-3%C3%AE-d-glucan-assay-in-early-diagnosis-of-invasive-fungal-infections-in-a-neonatal-intensive-care-unit
#19
Abd Elazeez Shabaan, Lobna Mahmoud Elbaz, Wafaa M El-Emshaty, Basma Shouman
OBJECTIVES: To study the microbiological pattern of late onset neonatal sepsis cultures and to assess the diagnostic performance of serum (1,3)-β-d-glucan level for early diagnosis of invasive fungemia in high-risk infants admitted to a neonatal intensive care unit. METHODS: A prospective multicenter clinical trial conducted on infants at high risk for invasive fungal infections, with suspected late onset sepsis, admitted to a neonatal intensive care unit at Mansoura University Children's Hospital and Mansoura General Hospital between March 2014 and February 2016...
November 13, 2017: Jornal de Pediatria
https://www.readbyqxmd.com/read/29143113/percutaneous-ct-guided-sacroiliac-joint-sampling-for-infection-aspiration-biopsy-and-technique
#20
David Knipp, F Joseph Simeone, Sandra B Nelson, Ambrose J Huang, Connie Y Chang
OBJECTIVE: To evaluate methods of CT-guided sacroiliac joint sampling in patients with suspected infection. MATERIALS AND METHODS: All CT-guided sacroiliac joint sampling procedures for suspected infection were reviewed for sampling type (aspiration, lavage aspiration, biopsy), microbiology results, and clinical and imaging follow-up. The primary gold standard was anatomic pathology. If pathology was not available, then positive blood culture with the same organism as SIJ sampling, imaging and clinical follow-up, or clinical follow-up only were used...
November 15, 2017: Skeletal Radiology
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