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https://www.readbyqxmd.com/read/29223100/activation-of-anti-oxidant-nrf2-signaling-by-enone-analogues-of-curcumin
#1
Lorraine M Deck, Lucy A Hunsaker, Thomas A Vander Jagt, Lisa J Whalen, Robert E Royer, David L Vander Jagt
Inflammation and oxidative stress are common in many chronic diseases. Targeting signaling pathways that contribute to these conditions may have therapeutic potential. The transcription factor Nrf2 is a major regulator of phase II detoxification and anti-oxidant genes as well as anti-inflammatory and neuroprotective genes. Nrf2 is widespread in the CNS and is recognized as an important regulator of brain inflammation. The natural product curcumin exhibits numerous biological activities including ability to induce the expression of Nrf2-dependent phase II and anti-oxidant enzymes...
November 21, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29222974/cold-atmospheric-plasma-cap-a-novel-physicochemical-source-induces-neural-differentiation-through-cross-talk-between-the-specific-rons-cascade-and-trk-ras-erk-signaling-pathway
#2
Ja-Young Jang, Young June Hong, Junsup Lim, Jin Sung Choi, Eun Ha Choi, Seongman Kang, Hyangshuk Rhim
Plasma, formed by ionization of gas molecules or atoms, is the most abundant form of matter and consists of highly reactive physicochemical species. In the physics and chemistry fields, plasma has been extensively studied; however, the exact action mechanisms of plasma on biological systems, including cells and humans, are not well known. Recent evidence suggests that cold atmospheric plasma (CAP), which refers to plasma used in the biomedical field, may regulate diverse cellular processes, including neural differentiation...
November 30, 2017: Biomaterials
https://www.readbyqxmd.com/read/29222887/relationship-between-umami-taste-acuity-with-sweet-or-bitter-taste-acuity-and-food-selection-in-japanese-women-university-students
#3
Masaru Kubota, Chikako Toda, Ayako Nagai-Moriyama
BACKGROUND AND OBJECTIVES: Although there are many studies on the umami receptor and its signaling pathway, literature on the effect of umami taste acuity on dietary choices in healthy subjects is limited. The current study aims to clarify the relationship between umami taste acuity with sweet or bitter taste acuity, food preference and intake. METHODS AND STUDY DESIGN: Forty-two healthy Japanese female university students were enrolled. The acuity for umami, sweet, and bitter tastes was evaluated using the filter-paper disc method...
2018: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29222871/myelin-extracellular-leaflet-compaction-requires-apolipoprotein-d-membrane-management-to-optimize-lysosomal-dependent-recycling-and-glycocalyx-removal
#4
Nadia García-Mateo, Raquel Pascua-Maestro, Alberto Pérez-Castellanos, Concepción Lillo, Diego Sanchez, Maria D Ganfornina
To compact the extracellular sides of myelin, an important transition must take place: from membrane sliding, while building the wraps, to membrane adhesion and water exclusion. Removal of the negatively charged glycocalyx becomes the limiting factor in such transition. What is required to initiate this membrane-zipping process? Knocking-out the Lipocalin Apolipoprotein D (ApoD), essential for lysosomal functional integrity in glial cells, results in a specific defect in myelin extracellular leaflet compaction in peripheral and central nervous system, which results in reduced conduction velocity and suboptimal behavioral outputs: motor learning is compromised...
December 9, 2017: Glia
https://www.readbyqxmd.com/read/29222817/diverse-inhibitory-and-excitatory-mechanisms-shape-temporal-tuning-in-transient-off-alpha-ganglion-cells-in-the-rabbit-retina
#5
Benjamin L Murphy-Baum, W Rowland Taylor
The twenty to thirty types of ganglion cell in the mammalian retina represent parallel signalling pathways that convey different information to the brain. Alpha ganglion cells are selective for high temporal frequencies in visual inputs, which makes them particularly sensitive to rapid motion. Although alpha ganglion cells have been studied in several species, the synaptic basis for their selective temporal tuning remains unclear. Here, we analyse excitatory synaptic inputs to transient OFF alpha ganglion cells (t-OFF α GCs) in the rabbit retina...
December 8, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/29222769/neurotrophic-factors-an-overview
#6
Stephen D Skaper
The neurotrophins are a family of closely related proteins that were first identified as survival factors for sympathetic and sensory neurons and have since been shown to control a number of aspects of survival, development, and function of neurons in both the central and peripheral nervous systems. Limiting quantities of neurotrophins during development control the numbers of surviving neurons to ensure a match between neurons and the requirement for a suitable density of target innervation. Biological effects of each of the four mammalian neurotrophins are mediated through activation of one or more of the three members of the tropomyosin-related kinase (Trk) family of receptor tyrosine kinases (TrkA, TrkB, and TrkC)...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29222758/differential-proteomics-based-on-2d-difference-in-gel-electrophoresis-and-tandem-mass-spectrometry-for-the-elucidation-of-biological-processes-in-antibiotic-producer-bacterial-strains
#7
Giuseppe Gallo, Andrea Scaloni
Proteomics based on 2D-Difference In Gel Electrophoresis (2D-DIGE) coupled with mass spectrometry (MS) procedures can be considered a "gold standard" to determine quantitatively and comparatively protein abundances in cell extracts from different biological sources/conditions according to a gel-based approach. In particular, 2D-DIGE is used for protein specie separation, detection, and relative quantification, whenever tandem MS is used to obtain peptide sequence information that is managed according to bioinformatic procedures to identify the differentially represented protein species...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29222744/activation-of-intestinal-gr-fxr-and-ppar%C3%AE-ugt-signaling-exacerbates-ibuprofen-induced-enteropathy-in-mice
#8
Zhiqiang Lu, Yuanfu Lu, Xue Wang, Fangyu Wang, Youcai Zhang
Nonsteroidal anti-inflammatory drugs (NSAIDs)-induced small intestinal injury (enteropathy) occurs in about two-thirds of regular NSAID users. To date, there is no proven-effective treatment for NSAID enteropathy, and its underlying mechanism remains obscure. The present study showed that glucocorticoids are an important determinant of NSAID enteropathy. High dose dexamethasone (DEX, 75 mg/kg) markedly exacerbated the acute toxicity of ibuprofen (IBU, 200 mg/kg) in the small intestine of mice, which was not due to the pregnane-X-receptor pathway...
December 8, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/29222519/virtual-screening-for-inhibitors-of-the-human-tslp-tslpr-interaction
#9
Dries Van Rompaey, Kenneth Verstraete, Frank Peelman, Savvas N Savvides, Koen Augustyns, Pieter Van Der Veken, Hans De Winter
The pro-inflammatory cytokine thymic stromal lymphopoietin (TSLP) plays a pivotal role in the pathophysiology of various allergy disorders that are mediated by type 2 helper T cell (Th2) responses, such as asthma and atopic dermatitis. TSLP forms a ternary complex with the TSLP receptor (TSLPR) and the interleukin-7-receptor subunit alpha (IL-7Rα), thereby activating a signaling cascade that culminates in the release of pro-inflammatory mediators. In this study, we conducted an in silico characterization of the TSLP:TSLPR complex to investigate the drugability of this complex...
December 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29222517/input-dependent-regulation-of-excitability-controls-dendritic-maturation-in-somatosensory-thalamocortical-neurons
#10
Laura Frangeul, Vassilis Kehayas, Jose V Sanchez-Mut, Sabine Fièvre, K Krishna-K, Gabrielle Pouchelon, Ludovic Telley, Camilla Bellone, Anthony Holtmaat, Johannes Gräff, Jeffrey D Macklis, Denis Jabaudon
Input from the sensory organs is required to pattern neurons into topographical maps during development. Dendritic complexity critically determines this patterning process; yet, how signals from the periphery act to control dendritic maturation is unclear. Here, using genetic and surgical manipulations of sensory input in mouse somatosensory thalamocortical neurons, we show that membrane excitability is a critical component of dendritic development. Using a combination of genetic approaches, we find that ablation of N-methyl-D-aspartate (NMDA) receptors during postnatal development leads to epigenetic repression of Kv1...
December 8, 2017: Nature Communications
https://www.readbyqxmd.com/read/29222513/biotrophy-necrotrophy-switch-in-pathogen-evoke-differential-response-in-resistant-and-susceptible-sesame-involving-multiple-signaling-pathways-at-different-phases
#11
Supriyo Chowdhury, Arpita Basu, Surekha Kundu
Infection stages of charcoal rot fungus Macrophomina phaseolina in sesame revealed for the first time a transition from biotrophy via BNS (biotrophy-to-necrotrophy switch) to necrotrophy as confirmed by transcriptional studies. Microscopy using normal and GFP-expressing pathogen showed typical constricted thick intercellular bitrophic hyphae which gave rise to thin intracellular necrotrophic hyphae during BNS and this stage was delayed in a resistant host. Results also show that as the pathogen switched its strategy of infection, the host tailored its defense strategy to meet the changing situation...
December 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29222481/hypoxia-inducible-factor-prolyl-4-hydroxylase-1-is-a-convergent-point-in-the-reciprocal-negative-regulation-of-nf-%C3%AE%C2%BAb-and-p53-signaling-pathways
#12
Karim Ullah, Ann-Helen Rosendahl, Valerio Izzi, Ulrich Bergmann, Taina Pihlajaniemi, Joni M Mäki, Johanna Myllyharju
Hypoxia-inducible factor 1α (HIF1α) induces the expression of several hundred genes in hypoxia aiming at restoration of oxygen homeostasis. HIF prolyl-4-hydroxylases (HIF-P4Hs) regulate the stability of HIF1α in an oxygen-dependent manner. Hypoxia is a common feature in inflammation and cancer and the HIF pathway is closely linked with the inflammatory NF-κB and tumor suppressor p53 pathways. Here we show that genetic inactivation or chemical inhibition of HIF-P4H-1 leads to downregulation of proinflammatory genes, while proapoptotic genes are upregulated...
December 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29222469/hippocampal-oxytocin-receptors-are-necessary-for-discrimination-of-social-stimuli
#13
Tara Raam, Kathleen M McAvoy, Antoine Besnard, Alexa Veenema, Amar Sahay
Oxytocin receptor (Oxtr) signaling in neural circuits mediating discrimination of social stimuli and affiliation or avoidance behavior is thought to guide social recognition. Remarkably, the physiological functions of Oxtrs in the hippocampus are not known. Here we demonstrate using genetic and pharmacological approaches that Oxtrs in the anterior dentate gyrus (aDG) and anterior CA2/CA3 (aCA2/CA3) of mice are necessary for discrimination of social, but not non-social, stimuli. Further, Oxtrs in aCA2/CA3 neurons recruit a population-based coding mechanism to mediate social stimuli discrimination...
December 8, 2017: Nature Communications
https://www.readbyqxmd.com/read/29222397/indoxyl-sulfate-upregulates-liver-p-glycoprotein-expression-and-activity-through-aryl-hydrocarbon-receptor-signaling
#14
Tacy Santana Machado, Stéphane Poitevin, Pascale Paul, Nathalie McKay, Noémie Jourde-Chiche, Tristan Legris, Annick Mouly-Bandini, Françoise Dignat-George, Philippe Brunet, Rosalinde Masereeuw, Stéphane Burtey, Claire Cerini
In patients with CKD, not only renal but also, nonrenal clearance of drugs is altered. Uremic toxins could modify the expression and/or activity of drug transporters in the liver. We tested whether the uremic toxin indoxyl sulfate (IS), an endogenous ligand of the transcription factor aryl hydrocarbon receptor, could change the expression of the following liver transporters involved in drug clearance: SLC10A1, SLC22A1, SLC22A7, SLC47A1, SLCO1B1, SLCO1B3, SLCO2B1, ABCB1, ABCB11, ABCC2, ABCC3, ABCC4, ABCC6, and ABCG2 We showed that IS increases the expression and activity of the efflux transporter P-glycoprotein (P-gp) encoded by ABCB1 in human hepatoma cells (HepG2) without modifying the expression of the other transporters...
December 8, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29222391/the-g-protein-coupled-receptor-gpr161-regulates-forelimb-formation-limb-patterning-and-skeletal-morphogenesis-in-a-primary-cilium-dependent-manner
#15
Sun-Hee Hwang, Kevin A White, Bandarigoda Nipunika Somatilaka, John M Shelton, James A Richardson, Saikat Mukhopadhyay
The role of basal suppression of Sonic hedgehog (Shh) pathway and its interaction with Indian hedgehog (Ihh) signaling during limb/skeletal morphogenesis is not well understood. The orphan G-protein-coupled receptor, Gpr161 localizes to primary cilia, and functions as a negative regulator of Shh signaling by promoting Gli transcriptional repressor versus activator formation. Here, we show that forelimb buds are not formed in Gpr161 knockout mice embryos despite establishment of prospective limb fields. Limb-specific deletion of Gpr161 resulted in prematurely expanded Shh signaling and ectopic Shh-dependent patterning defects to cause polysyndactyly...
December 8, 2017: Development
https://www.readbyqxmd.com/read/29222348/insulin-degrading-enzyme-contributes-to-the-pathology-in-a-mixed-model-of-type-2-diabetes-and-alzheimer-s-disease
#16
Huajie Li, Jian Wu, Linfeng Zhu, Luolin Sha, Song Yang, Jiang Wei, Lei Ji, Xiaochun Tang, Keshi Mao, Liping Cao, Ning Wei, Wei Xie, Zhilong Yang
Insulin degrading enzyme (IDE) is believed to act as a junction point of type 2 diabetes (T2D) and Alzheimer's disease (AD), however, the underlying mechanism was not completely clear yet. Transgenic APPSwe/PS1 mice were used as the AD model and were treated with streptozocin/streptozotocin (STZ) to develop a mixed mice model presenting both AD and T2D. Morris Water Maze (MWM) and recognition task were performed to trace the cognitive function. The detection of fasting plasma glucose (FPG) and plasma insulin concentration, and Oral Glucose Tolerance Test (OGTT) were used to trace the metabolism evolution...
December 8, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/29222344/trip6-inhibits-hippo-signaling-in-response-to-tension-at-adherens-junctions
#17
Shubham Dutta, Sebastian Mana-Capelli, Murugan Paramasivam, Ishani Dasgupta, Heather Cirka, Kris Billiar, Dannel McCollum
The transcriptional co-activator YAP controls cell proliferation, survival, and tissue regeneration in response to changes in the mechanical environment. It is not known how mechanical stimuli such as tension are sensed and how the signal is transduced to control YAP activity. Here, we show that the LIM domain protein TRIP6 acts as part of a mechanotransduction pathway at adherens junctions to promote YAP activity by inhibiting the LATS1/2 kinases. Previous studies showed that vinculin at adherens junctions becomes activated by mechanical tension...
December 8, 2017: EMBO Reports
https://www.readbyqxmd.com/read/29222335/single-cell-transcriptome-sequencing-reveals-that-cell-division-cycle-5-like-protein-is-essential-for-porcine-oocyte-maturation
#18
Xiao-Man Liu, Yan-Kui Wang, Yun-Hua Liu, Xiao-Xia Yu, Pei-Chao Wang, Xuan Li, Zhi-Qiang Du, Cai-Xia Yang
The brilliant cresyl blue (BCB) test is used in both basic biological research and assisted reproduction to identify oocytes likely to be developmentally competent. However, the underlying molecular mechanism targeted by the BCB test is still unclear. To explore this question, we first confirmed that BCB-positive porcine oocytes had higher rates of meiotic maturation, better rates of cleavage and development into blastocysts, and lower death rates. Subsequent single-cell transcriptome sequencing on porcine germinal vesicle (GV)-stage oocytes identified 155 genes that were significantly differentially expressed between BCB-negative and BCB-positive oocytes...
December 8, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29222328/fructose-and-glucose-regulate-mammalian-target-of-rapamycin-complex-1-and-can-activate-lipogenic-gene-expression-via-distinct-pathways
#19
Yue Hu, Ivana Semova, Xiaowei Sun, Hong Kang, Satyapal Chahar, Anthony N Hollenberg, David Masson, Matthew D Hirschey, Ji Miao, Sudha B Biddinger
Though calorically equivalent to glucose, fructose appears to be more lipogenic, leading to dyslipidemia, fatty liver disease, cardiovascular disease, and diabetes. To better understand how fructose induces lipogenesis, we compared the effects of fructose and glucose on the mTORC1 signaling node, a central regulator of lipogenesis. We found that fructose acutely and transiently suppressed mTORC1 signaling in vitro and in vivo. The constitutive activation of mTORC1 reduced hepatic lipogenic gene expression and produced hypotriglyceridemia after one week of fructose feeding...
December 8, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29222305/biology-of-cns-lymphoma-and-the-potential-of-novel-agents
#20
REVIEW
James L Rubenstein
Primary and secondary CNS lymphomas are aggressive brain tumors that pose an immense challenge to define in terms of molecular pathogenesis, as well as to effectively treat. During the past 10 years improvements in survival have been achieved with the implementation of anti-CD20 immunotherapy and optimization of dose-intensive consolidation strategies. The applications of whole-exome sequencing, comparative genomic hybridization, transcriptional profiling, and examination of the tumor microenvironment, particularly in the context of clinical investigation, provide insights that create a roadmap for the development and implementation of novel targeted agents for this disease...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
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