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https://www.readbyqxmd.com/read/29339832/clock%C3%AE-19-mutation-modifies-the-manner-of-synchrony-among-oscillation-neurons-in-the-suprachiasmatic-nucleus
#1
Mitsugu Sujino, Takeshi Asakawa, Mamoru Nagano, Satoshi Koinuma, Koh-Hei Masumoto, Yasufumi Shigeyoshi
In mammals, the principal circadian oscillator exists in the hypothalamic suprachiasmatic nucleus (SCN). In the SCN, CLOCK works as an essential component of molecular circadian oscillation, and ClockΔ19 mutant mice show unique characteristics of circadian rhythms such as extended free running periods, amplitude attenuation, and high-magnitude phase-resetting responses. Here we investigated what modifications occur in the spatiotemporal organization of clock gene expression in the SCN of ClockΔ19 mutants...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29336572/-hg-scn-3-2-%C3%AE-l-2-an-efficient-secondary-building-unit-for-the-synthesis-of-2d-iron-ii-spin-crossover-coordination-polymers
#2
Daopeng Zhang, Francisco Javier Valverde-Muñoz, Carlos Bartual-Murgui, Lucía Piñeiro-López, M Carmen Muñoz, José Antonio Real
We report an unprecedented series of two-dimensional (2D) spin-crossover (SCO) heterobimetallic coordination polymers generically formulated as {FeII[(HgII(SCN)3)2](L)x}·Solv, where x = 2 for L = tvp (trans-(4,4'-vinylenedipyridine)) (1tvp), bpmh ((1E,2E)-1,2-bis(pyridin-4-ylmethylene)hydrazine) (1bpmh·nCH3OH; n = 0, 1), bpeh ((1E,2E)-1,2-bis(1-(pyridin-4-yl)ethylidene)hydrazine) (1bpeh·nH2O; n = 0, 1) and x = 2.33 for L = bpbz (1,4-bis(pyridin-4-yl)benzene) (1bpbz·nH2O; n = 0, 2/3). The results confirm that self-assembly of FeII, [HgII(SCN)4]2-, and ditopic rodlike bridging ligands L containing 4-pyridyl moieties favors the formation of linear [Fe(μ-L)]n2n+ chains and in situ generated binuclear units {[HgII(SCN)3]2(μ-L)}2-...
January 16, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29325350/-the-current-status-of-diagnosis-and-treatment-of-pancreatic-cystic-neoplasm-in-china-a-report-of-2-251-cases
#3
(no author information available yet)
Objective: To analyze the current status of diagnosis and treatment of pancreatic cystic neoplasm(PCN)in China. Methods: Clinical data of 2 251 PCN patients who underwent surgical resection from January 2006 to December 2016 in 16 institutions was retrospectively analyzed.Excel database was created which covered 132 fields of 7 fields: general information of patients, imaging findings, preoperative blood biochemical indexes, tumor markers, surgical related data, postoperative complications and pathology. Results: Of the 2 251 patients, the male to female ratio was 1...
January 1, 2018: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/29323893/modular-feiii8mii6-n-mii-pd-co-ni-cu-coordination-cages
#4
Sergio Sanz, Helen M O'Connor, Priyanka Comar, Amgalanbaatar Baldansuren, Mateusz B Pitak, Simon J Coles, Høgni Weihe, Nicholas F Chilton, Eric J L McInnes, Paul J Lusby, Stergios Piligkos, Euan K Brechin
The reaction of the simple metalloligand [FeIIIL3] [HL = 1-(4-pyridyl)butane-1,3-dione] with a variety of different MII salts results in the formation of a family of heterometallic cages of formulae [FeIII8PdII6L24]Cl12 (1), [FeIII8CuII6L24(H2O)4Br4]Br8 (2), [FeIII8CuII6L24(H2O)10](NO3)12 (3), [FeIII8NiII6L24(SCN)11Cl] (4), and [FeIII8CoII6L24(SCN)10(H2O)2]Cl2 (5). The metallic skeleton of each cage describes a cube in which the FeIII ions occupy the eight vertices and the MII ions lie at the center of the six faces...
January 11, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29321394/-chrono-nutrition-and-n-3-polyunsaturated-fatty-acid
#5
Shigenobu Shibata, Akiko Furutani
Circadian clock system has been widely maintained in many spices from prokaryote to mammals. "Circadian" means "approximately day" in Latin, thus circadian rhythm means about 24 hour rhythms. The earth revolves once every 24 hours, and our circadian system has been developed for adjusting to this 24 hour cycles, to get sun light information for getting their foods or for alive in birds or mammals. We have two different circadian systems so-called main oscillator located in the suprachiasmatic nucleus (SCN) of the hypothalamus, and local oscillator located in the various peripheral organ tissues such as liver, kidney and skeletal muscle...
2018: Nihon Yakurigaku Zasshi. Folia Pharmacologica Japonica
https://www.readbyqxmd.com/read/29318856/-effect-of-acupuncture-at-points-in-heel-vessel-for-circadian-clock-genes-of-period-1-and-period-2-mrnas-in-the-suprachiasmatic-nucleus-in-insomnia-rats
#6
Bao-Jun Guo, Si-Yi Yu, Zhi-Fu Shen, You-Ping Hu
OBJECTIVE: To investigate the influence and mechanism of acupuncture at the points in Heel Vessel for the circadian clock genes of Period (Per) 1 and Per 2 mRNAs in the suprachiasmatic nucleus (SCN) in insomnia rats. METHODS: Thirty male SD rats were randomly divided into blank, model, acupuncture groups, 10 rats in each group. Insomnia model was established by intraperitoneal injection of PCPA (suspension, 1 mL/100 g). Acupuncture at "Shenmai" (BL 62) and "Zhaohai" (KI 6) was used in the acupuncture group for continuous 7 days, 15 min/day and once daily...
December 25, 2017: Zhen Ci Yan Jiu, Acupuncture Research
https://www.readbyqxmd.com/read/29318587/new-perspectives-on-the-role-of-melatonin-in-human-sleep-circadian-rhythms-and-their-regulation
#7
REVIEW
N Zisapel
In mammals a central circadian clock, located in the suprachiasmatic nuclei (SCN) of the hypothalamus, tunes the innate circadian physiological rhythms to the ambient 24h light-dark cycle to invigorate and optimize the internal temporal order. The SCN-activated, light- inhibited production of melatonin conveys the message of darkness to the clock and induces night state in physiological function, e.g., sleep/wake blood pressure and metabolism. Clinically meaningful effects of melatonin treatment have been demonstrated in placebo-controlled trials in humans, particularly in disorders associated with diminished or misaligned melatonin rhythms, e...
January 10, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29316898/inhibition-of-p38-mapk-activity-leads-to-cell-type-specific-effects-on-the-molecular-circadian-clock-and-time-dependent-reduction-of-glioma-cell-invasiveness
#8
Charles S Goldsmith, Sam Moon Kim, Nirmala Karunarathna, Nichole Neuendorff, L Gerard Toussaint, David J Earnest, Deborah Bell-Pedersen
BACKGROUND: The circadian clock is the basis for biological time keeping in eukaryotic organisms. The clock mechanism relies on biochemical signaling pathways to detect environmental stimuli and to regulate the expression of clock-controlled genes throughout the body. MAPK signaling pathways function in both circadian input and output pathways in mammals depending on the tissue; however, little is known about the role of p38 MAPK, an established tumor suppressor, in the mammalian circadian system...
January 10, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29306125/simultaneous-nitrite-and-ammonium-production-in-an-autotrophic-partial-denitrification-and-ammonification-of-wastewaters-containing-thiocyanate
#9
Jianxin Pan, Chaohai Wei, Bingbing Fu, Jingde Ma, Sergei Preis, Haizhen Wu, Shuang Zhu
Various products are observed in biological oxidation and reduction of molecules containing elements of variable valence. The variability is caused by the diversity of microorganisms and their metabolic enzymes, which may develop into novel processes in wastewater treatment. The study aimed to develop a novel denitrification process forming nitrite and ammonium in wastewaters containing thiocyanate. High-efficiency nitrite and ammonium production was observed due to autotrophic partial denitrification and ammonification as a result of nitrate and thiocyanate removal...
December 20, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29305918/circadian-modification-network-of-a-core-clock-driver-bmal1-to-harmonize-physiology-from-brain-to-peripheral-tissues
#10
Teruya Tamaru, Ken Takamatsu
Circadian clocks dictate various physiological functions by brain SCN (a central clock) -orchestrating the temporal harmony of peripheral clocks of tissues/organs in the whole body, with adaptability to environments by resetting their timings. Dysfunction of this circadian adaptation system (CAS) occasionally causes/exacerbates diseases. CAS is based on cell-autonomous molecular clocks, which oscillate via a core transcriptional/translational feedback loop with clock genes/proteins, e.g., BMAL1: CLOCK circadian transcription driver and CRY1/2 and PER1/2 suppressors, and is modulated by various regulatory loops including clock protein modifications...
January 3, 2018: Neurochemistry International
https://www.readbyqxmd.com/read/29302650/enhanced-dissolution-of-ibuprofen-using-ionic-liquids-as-catanionic-hydrotropes
#11
T E Sintra, K Shimizu, S P M Ventura, S Shimizu, J N Canongia Lopes, J A P Coutinho
The therapeutic effectiveness of a drug largely depends on its bioavailability, and thus ultimately on its aqueous solubility. Hydrotropes are compounds able to enhance the solubility of hydrophobic substances in aqueous media and therefore are extensively used in the formulation of drugs and personal care products. Recently, some ionic liquids were shown to display a strong ability to enhance the solubility of biomolecules through hydrotropy. In this work, the impact of the ionic liquid chemical structures and their concentration on the solubility of ibuprofen was evaluated and compared with the performance of conventional hydrotropes...
January 5, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29301134/suprachiasmatic-nucleus-and-subordinate-brain-oscillators-clock-gene-desynchronization-by-neuroinflammation
#12
Leila Maria Guissoni Campos, Rogerio Leone Buchaim, Nathani Cristina da Silva, Caio Sergio Galina Spilla, Alessandre Hataka, Luciana Pinato
OBJECTIVE: The clock genes Period (per) 1 and 2 are essential components in the generation and adjustment of biological circadian rhythms by the suprachiasmatic nucleus (SCN). Both genes are also rhythmically present in extrahypothalamic areas such as the hippocampus and cerebellum, considered subordinate oscillators. Several pathological conditions alter rhythmic biological phenomena, but the mechanisms behind these changes involving the clock genes are not well defined. The current study investigated changes in PER1 and PER2 immunoreactivity in the SCN, hippocampus, and cerebellum in a neuroinflammation model...
January 5, 2018: Neuroimmunomodulation
https://www.readbyqxmd.com/read/29296734/gene-correction-of-hax1-reversed-kostmann-disease-phenotype-in-patient-specific-induced-pluripotent-stem-cells
#13
Erik Pittermann, Nico Lachmann, Glenn MacLean, Stephan Emmrich, Mania Ackermann, Gudrun Göhring, Brigitte Schlegelberger, Karl Welte, Axel Schambach, Dirk Heckl, Stuart H Orkin, Tobias Cantz, Jan-Henning Klusmann
Severe congenital neutropenia (SCN, Kostmann disease) is a heritable disorder characterized by a granulocytic maturation arrest. Biallelic mutations in HCLS1 associated protein X-1 (HAX1) are frequently detected in affected individuals, including those of the original pedigree described by Kostmann in 1956. To date, no faithful animal model has been established to study SCN mediated by HAX1 deficiency. Here we demonstrate defective neutrophilic differentiation and compensatory monocyte overproduction from patient-derived induced pluripotent stem cells (iPSCs) carrying the homozygous HAX1W44X nonsense mutation...
June 13, 2017: Blood Advances
https://www.readbyqxmd.com/read/29291493/89zr-for-antibody-labeling-and-in-vivo-studies-a-comparison-between-liquid-and-solid-target-production
#14
Gemma M Dias, Caterina F Ramogida, Julie Rousseau, Nicholas A Zacchia, Cornelia Hoehr, Paul Schaffer, Kuo-Shyan Lin, François Bénard
INTRODUCTION: Zirconium-89 (89Zr, t1/2=78.4h) liquid target (LT) production offers an approach to introduce this positron-emitting isotope to cyclotron centres without the need for a separate solid target (ST) production set up. We compared the production, purification, and antibody radiolabeling yields of 89Zr-(LT) and 89Zr-(ST), and assessed the feasibility of 89Zr-(LT) for preclinical PET/CT. METHODS: 89Zr-(ST) production was performed with an 89Y foil on a TR 19 cyclotron at 13...
November 16, 2017: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/29278313/interactions-between-psychosocial-stress-and-the-circadian-endogenous-clock
#15
REVIEW
Charlotte Helfrich-Förster
Animals are exposed to regular daily challenges in their environment as well as to unpredictable stressful events, so-called stressors. Both measures require adequate physiological responses that are controlled by the circadian system and the stress system. The two systems are highly linked with each other. The circadian system prepares the animal for the regular daily challenges by upregulating the stress system before the animal's activity phase every day. In addition, unpredicted environmental challenges upregulate the stress system independently of the circadian system...
December 2017: PsyCh Journal
https://www.readbyqxmd.com/read/29277253/simultaneous-determination-of-inorganic-anions-and-cations-by-supercritical-fluid-chromatography-using-evaporative-light-scattering-detection
#16
Catherine Foulon, Pauline Di Giulio, Marie Lecoeur
Supercritical fluid chromatography (SFC) is commonly used for the analysis of non-polar compounds, but remains poorly explored for the separation of polar and ionized molecules. In this paper, SFC has been investigated for the separation of 14 inorganic ions sampled in aqueous solutions. Four polar stationary phases were first screened using CO2-methanol-based mobile phases containing water or different acidic or basic additives, in order to select the most efficient conditions for the simultaneous retention of inorganic cations and anions and to favor their detection using evaporative light scattering detector (ELSD)...
December 18, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29274752/chronic-paroxetine-treatment-prevents-disruption-of-methamphetamine-sensitive-circadian-oscillator-in-a-transgenic-mouse-model-of-huntington-s-disease
#17
Koliane Ouk, Juliet Aungier, Marc Cuesta, A Jennifer Morton
Circadian abnormalities seen in Huntington's disease (HD) patients are recapitulated in several HD transgenic mouse models. In mice, alongside the master clock located in the suprachiasmatic nucleus (SCN), two other oscillators may influence circadian behaviour. These are the food-entrainable oscillator (FEO) and the methamphetamine-sensitive circadian oscillator (MASCO). SCN- and MASCO- (but not FEO-) driven rhythms are progressively disrupted in the R6/2 mouse model of HD. MASCO-driven rhythms are induced by chronic treatment with low dose of methamphetamine and characterised by an increase in period length to greater than 24 h...
December 21, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29274746/structural-covariance-networks-are-coupled-to-expression-of-genes-enriched-in-supragranular-layers-of-the-human-cortex
#18
Rafael Romero-Garcia, Kirstie J Whitaker, František Váša, Jakob Seidlitz, Maxwell Shinn, Peter Fonagy, Raymond J Dolan, Peter B Jones, Ian M Goodyer
Complex network topology is characteristic of many biological systems, including anatomical and functional brain networks (connectomes). Here, we first constructed a structural covariance network from MRI measures of cortical thickness on 296 healthy volunteers, aged 14-24 years. Next, we designed a new algorithm for matching sample locations from the Allen Brain Atlas to the nodes of the SCN. Subsequently we used this to define, transcriptomic brain networks by estimating gene co-expression between pairs of cortical regions...
December 21, 2017: NeuroImage
https://www.readbyqxmd.com/read/29259331/characterization-of-soybean-wrky-gene-family-and-identification-of-soybean-wrky-genes-that-promote-resistance-to-soybean-cyst-nematode
#19
Yan Yang, Yuan Zhou, Yingjun Chi, Baofang Fan, Zhixiang Chen
WRKY proteins are a superfamily of plant transcription factors with important roles in plants. WRKY proteins have been extensively analyzed in plant species including Arabidopsis and rice. Here we report characterization of soybean WRKY gene family and their functional analysis in resistance to soybean cyst nematode (SCN), the most important soybean pathogen. Through search of the soybean genome, we identified 174 genes encoding WRKY proteins that can be classified into seven groups as established in other plants...
December 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29259208/interaction-of-local-solidification-and-remelting-during-dendrite-coarsening-modeling-and-comparison-with-experiments
#20
Qingyu Zhang, Hui Fang, Hua Xue, Shiyan Pan, Markus Rettenmayr, Mingfang Zhu
The microstructural evolution of dendrite coarsening during isothermal holding is simulated using a quantitative cellular automaton (CA) model involving the mechanisms of both solidification and melting. The present model encompasses the essential aspects of thermodynamics and kinetics, particularly the evolution/influence of composition, temperature, and curvature, leading to valid simulations of simultaneous solidification and melting. Model validation is performed through a comparison of the CA simulations with analytical predictions for a liquid pool migrating in the mushy zone of a SCN-0...
December 19, 2017: Scientific Reports
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