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https://www.readbyqxmd.com/read/29471538/novel-roles-of-ascorbate-in-plants-induction-of-cytosolic-ca2-signals-and-efflux-from-cells-via-anion-channels
#1
M Makavitskaya, D Svistunenko, I Navaselsky, P Hryvusevich, V Mackievic, C Rabadanova, E Tyutereva, V Samokhina, D Straltsova, A Sokolik, O Voitsekhovskaja, V Demidchik
Ascorbate is not often considered as a signalling molecule in plants. This study demonstrates that, in Arabidopsis roots, exogenous L-ascorbic acid triggers a transient increase of the cytosolic free calcium activity ([Ca2+]cyt.) that is central to plant signalling. Exogenous copper and iron stimulates the ascorbate-induced [Ca2+]cyt. elevation while cation channel blockers, free radical scavengers, low extracellular [Ca2+], transition metal chelators and removal of the cell wall inhibit this reaction. These data show that apoplastic redox-active transition metals are involved in the ascorbate-induced [Ca2+]cyt...
February 17, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29471361/microbial-community-composition-along-a-50-000-year-lacustrine-sediment-sequence
#2
Aurèle Vuillemin, Daniel Ariztegui, Fabian Horn, Jens Kallmeyer, William D Orsi
For decades, microbial community composition in subseafloor sediments has been the focus of extensive studies. In deep lacustrine sediments however, the taxonomic composition of microbial communities remains undercharacterized. Greater knowledge on microbial diversity in lacustrine sediments would improve our understanding of how environmental factors, and resulting selective pressures, shape subsurface biospheres in marine and freshwater sediments. Using high-throughput sequencing of 16S rRNA genes across high resolution climate intervals covering the last 50,000 years in Laguna Potrok Aike, Argentina, we identified changes in microbial populations in response to both past environmental conditions and geochemical changes of the sediment during burial...
February 20, 2018: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/29471299/the-effect-of-allium-cepa-extract-on-lung-oxidant-antioxidant-and-immunological-biomarkers-in-ovalbumin-sensitized-rats
#3
Narges Marefati, Naeima Eftekhar, Mahsa Kaveh, Javad Boskabadi, Farimah Beheshti, Mohammad Hossein Boskabady
OBJECTIVES: To evaluate the effects of Allium cepa (A. cepa) on levels of oxidants, antioxidants and immunological markers in the broncho-alveolar lavage fluids in sensitized rats. MATERIALS AND METHODS: Oxidant-antioxidant markers and cytokines in BALF of control rats treated with saline (group C), ovalbumin-sensitized rats (group S), rats treated with 1.25 μg/ mL dexamethasone and three doses (35, 70 and 140 mg/kg/day) of A. cepa extract (S+AC) were investigated...
February 22, 2018: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
https://www.readbyqxmd.com/read/29471211/exogenous-nanosilica-improves-germination-and-growth-of-cucumber-by-maintaining-k-na-ratio-under-elevated-na-stress
#4
Abdullah Alsaeedi, Hassan El-Ramady, Tarek Alshaal, Mohamed El-Garawani, Nevien Elhawat, Awadh Al-Otaibi
The current work was aimed to elucidate the role of engineered nanosilica (SiNPs) particles to mitigate the damaging impacts of Na+ -derived salinity on cucumber (Cucumis sativus) Beit Alpha variety by conducting in vitro experiments applying various Na+ concentrations i.e. 0, 1000, 2000, 3000, 4000 and 5000 mg L-1 . By treating seeds and seedlings, respectively, of cucumber with SiNPs (0, 100, 200 and 300 ppm) and subsequent determination some germination and vegetative parameters as well as chemical analysis of seedlings, we verified that SiNPs succeeded to alleviate the detrimental effects of high Na+ salinity by increasing germination parameters and vegetative growth of cucumber seedlings...
February 9, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29471072/neuroreflex-control-of-cardiovascular-function-is-impaired-after-acute-poisoning-with-chlorpyrifos-an-organophosphorus-insecticide-possible-short-and-long-term-clinical-implications
#5
Alexandre F Cunha, Igor S A Felippe, Nilson C Ferreira-Junior, Leonardo B M Resstel, Daniela A M Guimarães, Vanessa Beijamini, Julian F R Paton, Karla N Sampaio
Although it is well-established that severe poisoning by organophosphorus (OP) compounds strongly affects the cardiorespiratory system, the effects of sub-lethal exposure to these compounds on the neural control of cardiovascular function are poorly explored. The aim of this study was to evaluate the effects of acute sub-lethal exposure to chlorpyrifos (CPF), a commonly used OP insecticide, on three basic reflex mechanisms involved in blood pressure regulation, the peripheral chemoreflex, the baroreflex and the Bezold-Jarisch reflex...
February 19, 2018: Toxicology
https://www.readbyqxmd.com/read/29470767/the-effects-of-tramadol-administration-on-hippocampal-cell-apoptosis-learning-and-memory-in-adult-rats-and-neuroprotective-effects-of-crocin
#6
Farideh Baghishani, Abbas Mohammadipour, Hossain Hosseinzadeh, Mahmoud Hosseini, Alireza Ebrahimzadeh-Bideskan
Tramadol, a frequently used pain reliever drug, present neurotoxic effects associated to cognitive dysfunction. Moreover, crocin has been reported to have neuroprotective effects. The aim of this study was to assess crocin's capacity to protect learning, and memory abilities on tramadol-treated rats. A total of 35 rats were divided into five groups: Control, Saline, tramadol (50 mg/kg), tramadol + crocin(30 mg/kg), crocin groups and treated orally for 28 consecutive days. Morris water maze (MWM) and passive avoidance (PA) tests were done, followed by dissection of the rat's brains for toluidine blue and TUNEL staining...
February 22, 2018: Metabolic Brain Disease
https://www.readbyqxmd.com/read/29470608/bacterial-communities-inhabiting-the-sponge-biemna-fortis-sediment-and-water-in-marine-lakes-and-the-open-sea
#7
Daniel F R Cleary, Ana R M Polónia, Nicole J de Voogd
Marine lakes are small bodies of landlocked seawater that are isolated from the open sea and have been shown to house numerous rare and unique taxa. The environmental conditions of the lakes are also characterised by lower pH and salinity and higher temperatures than generally found in the open sea. In the present study, we used a 16S rRNA gene barcoded pyrosequencing approach and a predictive metagenomic approach (PICRUSt) to examine bacterial composition and function in three distinct biotopes (sediment, water and the sponge species Biemna fortis) in three habitats (two marine lakes and the open sea) of the Berau reef system, Indonesia...
February 22, 2018: Microbial Ecology
https://www.readbyqxmd.com/read/29470516/evaluation-of-diagnostic-methods-for-the-detection-of-intestinal-schistosomiasis-in-endemic-areas-with-low-parasite-loads-saline-gradient-helmintex-kato-katz-and-rapid-urine-test
#8
Warllem Junio Oliveira, Fernanda do Carmo Magalhães, Andressa Mariana Saldanha Elias, Vanessa Normandio de Castro, Vivian Favero, Catieli Gobetti Lindholz, Áureo Almeida Oliveira, Fernando Sergio Barbosa, Frederico Gil, Maria Aparecida Gomes, Carlos Graeff-Teixeira, Martin Johannes Enk, Paulo Marcos Zech Coelho, Mariângela Carneiro, Deborah Aparecida Negrão-Corrêa, Stefan Michael Geiger
BACKGROUND: In some tropical countries, such as Brazil, schistosomiasis control programs have led to a significant reduction in the prevalence and parasite burden of endemic populations. In this setting, the Kato-Katz technique, as the standard diagnostic method for the diagnosis of Schistosoma mansoni infections, which involves the analysis of two slides from one fecal sample, loses its sensitivity. As a result, a significant number of infected individuals are not detected. The objective of this study was to perform extensive parasitological testing of up to three fecal samples and include a rapid urine test (POC-CCA) in a moderate prevalence area in Northern Minas Gerais, Brazil, and evaluate the performance of each test separately and in combination...
February 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29469962/apremilast-alters-behavioral-responses-to-ethanol-in-mice-i-reduced-ethanol-consumption-and-preference
#9
Yuri A Blednov, Adriana J Da Costa, Tamara Tarbox, Olga Ponomareva, Robert O Messing, R Adron Harris
BACKGROUND: Phosphodiesterase type 4 (PDE4) inhibitors produce widespread anti-inflammatory effects and reduce ethanol consumption in several rodent models. These drugs are potential treatments for several diseases, including central nervous system disorders, but clinical use is limited by their emetic activity. Apremilast is a selective PDE4 inhibitor with fewer gastrointestinal side effects that is FDA approved for the treatment of psoriasis. METHODS: We measured the acute and chronic effects of apremilast on ethanol consumption in male and female C57BL/6J mice using the continuous and intermittent 24-h two-bottle choice drinking models...
February 22, 2018: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/29469347/-mri-findings-of-cerebral-schistosomiasis-in-acute-stage%C3%AF-establishment-of-experimental-model-of-acute-cerebral-schistosomiasis-with-rabbits
#10
Ge Yu-Xi, Zhang Lian-He, Yan Gen, Zhang Jian-Feng, Pan Yong-Ming, Xuan Ying-Hua
OBJECTIVE: To establish an experimental model of acute cerebral schistosomiasis japonica and explore the MRI manifestations of acute cerebral schistosomiasis. METHODS: Rabbits were divided into 3 groups with 10 rabbits in each group. The rabbits in the experimental group were directly injected with suspension fluid of Schistosoma japonicum eggs (0.9 mg, 1 ml) by the cranial drilling method, those in the negative control group were given saline (1 ml) by the same method above-mentioned, and those in the blank control group were not given any treatment...
June 26, 2017: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
https://www.readbyqxmd.com/read/29468839/the-iron-stress-activated-rna-1-isar1-coordinates-osmotic-acclimation-and-iron-starvation-responses-in-the-cyanobacterium-synechocystis-sp-pcc-6803
#11
Henriette Rübsam, Friedrich Kirsch, Viktoria Reimann, Alexander Erban, Joachim Kopka, Martin Hagemann, Wolfgang R Hess, Stephan Klähn
In nature, microorganisms are exposed to multiple stress factors in parallel. Here, we investigated the response of the model cyanobacterium Synechocystis sp. PCC 6803 to simultaneous iron limitation and osmotic stresses. Iron is a major limiting factor for bacterial and phytoplankton growth in most environments. Thus, bacterial iron homeostasis is tightly regulated. In Synechocystis, it is mediated mainly by the transcriptional regulator FurA and the iron-stress activated RNA 1 (IsaR1). IsaR1 is an important riboregulator that affects the acclimation of the photosynthetic apparatus to iron starvation in multiple ways...
February 22, 2018: Environmental Microbiology
https://www.readbyqxmd.com/read/29468642/sensory-distribution-of-the-lateral-femoral-cutaneous-nerve-block-a-randomised-blinded-trial
#12
M Nersesjan, D Hägi-Pedersen, J H Andersen, O Mathiesen, J B Dahl, L Broeng, K H Thybo
BACKGROUND: The lateral femoral cutaneous nerve (LFCN) block may be used for post-operative pain management in patients undergoing total hip arthroplasty. The aim of this trial was to investigate the sensory coverage of the posterior and the lateral incision lines and the involvement of the femoral nerve after an LFCN block. METHODS: The study was a randomised, blinded trial in 20 healthy volunteers. All subjects received a bilateral LFCN block randomised to 8 ml ropivacaine on the right side and 8 ml isotonic saline on the left side, or vice versa...
February 21, 2018: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/29468612/selenium-enriched-saccharomyces-cerevisiae-reduces-the-progression-of-colorectal-cancer
#13
Jamileh Abedi, Maedeh Vakili Saatloo, Vahid Nejati, Rahim Hobbenaghi, Amir Tukmechi, Yousef Nami, Ahmad Yari Khosroushahi
Colorectal cancer is one of the most common causes of mortality in the world while malnutrition is responsible for one third of the problem. Selenium has been recommended for prevention of colorectal cancer. The present study was conducted to investigate the effect of selenium-enriched Saccharomyces cerevisiae in reducing colorectal cancer progression in rats. Five groups of 170-200-g weight rats (n = 40) including healthy and cancer controls, Saccharomyces cerevisiae, selenium, and selenium-enriched Saccharomyces cerevisiae-treated groups were examined...
February 21, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29468508/ultrasound-guided-bilateral-superficial-cervical-block-and-preemptive-single-dose-oral-tizanidine-for-post-thyroidectomy-pain-a-randomized-controlled-double-blind-study
#14
Ali Ahiskalioglu, Ahmet Murat Yayik, Elif Oral Ahiskalioglu, Aysenur Dostbil, Omer Doymus, Erdem Karadeniz, Muhammet Ali Ari, Furkan Sengoz, Haci Ahmet Alici, Erkan Cem Celik
PURPOSES: The postoperative analgesic effect of tizanidine has not yet been evaluated sufficiently. The role of bilateral superficial cervical plexus block (BSCPB) for postoperative analgesia after thyroidectomy remains questionable. We aimed to evaluate the analgesic effect of combined use of BSCPB and a single-dose oral tizanidine in patients undergoing elective thyroid surgery. METHODS: Sixty patients undergoing thyroidectomy were randomized into 3 groups. The control group (Group C, n = 20) received BSCPB with 0...
February 21, 2018: Journal of Anesthesia
https://www.readbyqxmd.com/read/29468307/understanding-the-antimicrobial-properties-activity-of-an-11-residue-lys-homopeptide-by-alanine-and-proline-scan
#15
P Carvajal-Rondanelli, M Aróstica, C A Álvarez, C Ojeda, F Albericio, L F Aguilar, S H Marshall, F Guzmán
Previous work demonstrated that lysine homopeptides adopt a polyproline II (PPII) structure. Lysine homopeptides with odd number of residues, especially with 11 residues (K11), were capable of inhibiting the growth of a broader spectrum of bacteria than those with an even number. Confocal studies also determined that K11 was able to localize exclusively in the bacterial membrane, leading to cell death. In this work, the mechanism of action of this peptide was further analyzed focused on examining the structural changes in bacterial membrane induced by K11, and in K11 itself when interacting with bacterial membrane lipids...
February 21, 2018: Amino Acids
https://www.readbyqxmd.com/read/29468048/a-novel-sperm-adaptation-to-evolutionary-constraints-on-reproduction-pre-ejaculatory-sperm-activation-in-the-beach-spawning-capelin-osmeridae
#16
José Beirão, Jason A Lewis, Brendan F Wringe, Craig F Purchase
Reproduction of external fertilizing vertebrates is typically constrained to either fresh or salt water, not both. For all studied amphibians and fishes, this constraint includes immotile sperm that are activated after ejaculation only by the specific chemistry of the fertilizing medium in which the species evolved (fresh, brackish, or salt water). No amphibians can reproduce in the sea. Although diadromous fishes may migrate between salt and fresh water, they are shackled to their natal environment for spawning in part because of sperm activation...
February 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29467778/effects-of-inundation-nutrient-availability-and-plant-species-diversity-on-fine-root-mass-and-morphology-across-a-saltmarsh-flooding-gradient
#17
Regine Redelstein, Thomas Dinter, Dietrich Hertel, Christoph Leuschner
Saltmarsh plants are exposed to multiple stresses including tidal inundation, salinity, wave action and sediment anoxia, which require specific root system adaptations to secure sufficient resource capture and firm anchorage in a temporary toxic environment. It is well known that many saltmarsh species develop large below-ground biomass (roots and rhizomes) but relations between fine roots, in particular, and the abiotic conditions in salt marshes are widely unknown. We studied fine root mass (<2 mm in diameter), fine root depth distribution and fine root morphology in three typical communities ( Spartina anglica -dominated pioneer zone, Atriplex portulacoides -dominated lower marsh, Elytrigia atherica -dominated upper marsh) across elevational gradients in two tidal salt marshes of the German North Sea coast [a mostly sandy marsh on a barrier island (Spiekeroog), and a silty-clayey marsh on the mainland coast (Westerhever)]...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29467772/genetic-and-genomic-tools-to-asssist-sugar-beet-improvement-the-value-of-the-crop-wild-relatives
#18
Filipa Monteiro, Lothar Frese, Sílvia Castro, Maria C Duarte, Octávio S Paulo, João Loureiro, Maria M Romeiras
Sugar beet ( Beta vulgaris L. ssp. vulgaris ) is one of the most important European crops for both food and sugar production. Crop improvement has been developed to enhance productivity, sugar content or other breeder's desirable traits. The introgression of traits from Crop Wild Relatives (CWR) has been done essentially for lessening biotic stresses constraints, namely using Beta and Patellifolia species which exhibit disease resistance characteristics. Several studies have addressed crop-to-wild gene flow, yet, for breeding programs genetic variability associated with agronomically important traits remains unexplored regarding abiotic factors...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29467733/diversity-of-rare-and-abundant-prokaryotic-phylotypes-in-the-prony-hydrothermal-field-and-comparison-with-other-serpentinite-hosted-ecosystems
#19
Eléonore Frouin, Méline Bes, Bernard Ollivier, Marianne Quéméneur, Anne Postec, Didier Debroas, Fabrice Armougom, Gaël Erauso
The Bay of Prony, South of New Caledonia, represents a unique serpentinite-hosted hydrothermal field due to its coastal situation. It harbors both submarine and intertidal active sites, discharging hydrogen- and methane-rich alkaline fluids of low salinity and mild temperature through porous carbonate edifices. In this study, we have extensively investigated the bacterial and archaeal communities inhabiting the hydrothermal chimneys from one intertidal and three submarine sites by 16S rRNA gene amplicon sequencing...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29467649/tolerance-and-tachyphylaxis-to-head-twitches-induced-by-the-5-ht2a-agonist-25cn-nboh-in-mice
#20
Tobias Buchborn, Taylor Lyons, Thomas Knöpfel
The serotonin (5-HT) 2A receptor is the primary molecular target of serotonergic hallucinogens, which trigger large-scale perturbations of the cortex. Our understanding of how 5-HT2A activation may cause the effects of hallucinogens has been hampered by the receptor unselectivity of most of the drugs of this class. Here we used 25CN-NBOH (N-(2-hydroxybenzyl)-2,5-dimethoxy-4-cyanophenylethylamine), a newly developed selective 5-HT2A agonist, and tested it with regard to the head-twitch-response (HTR) model of 5-HT2A activity and effects on locomotion...
2018: Frontiers in Pharmacology
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