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https://www.readbyqxmd.com/read/28931212/temozolomide-resistant-human-brain-tumor-stem-cells-are-susceptible-to-recombinant-vesicular-stomatitis-virus-and-double-deleted-vaccinia-virus-in-vitro
#1
Bin Jiang, Xueqing Lun, Xiaoguang Hao, Yihua Wang, Xin Yin, Dezhang Huang, Wei He, Zhigang Wang
BACKGROUND: Malignant glioma still has a poor prognosis and remains incurable. Although temozolomide (TMZ) has demonstrated antitumor activity, its use recently has been halted because of some patients' resistance to this drug. New treatments are desperately needed. An oncolytic virus (virotherapy) is being developed as a novel cancer therapy. We have previously reported that recombinant Vesicular Stomatitis Virus (VSV-ΔM51) and double deleted Vaccinia Virus (vvDD) infected and killed glioma cell lines in vitro and prolonged survival in animal glioma models...
September 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28927239/tubulins-rhythms-and-cell-walls-in-poplar-leaves-it-s-all-in-the-timing
#2
Scott A Harding, Hao Hu, Batbayar Nyamdari, Liang-Jiao Xue, Radnaa Naran, Chung-Jui Tsai
Plant cell walls exhibit architectural and compositional changes throughout their development and in response to external cues. While tubulins are involved in cell wall biogenesis, much remains unknown about the scope of their involvement during the orchestration of this resource-demanding process. A transgenic approach coupled with cell wall compositional analysis, RNA-seq and mining of publicly available diurnal gene expression data was used to assess the involvement of tubulins in poplar leaf cell wall biogenesis...
September 12, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28926983/expression-of-the-grape-vasts19-gene-in-arabidopsis-improves-resistance-to-powdery-mildew-and-botrytis-cinerea-but-increases-susceptibility-to-pseudomonas-syringe-pv-tomato-dc3000
#3
Yaqiong Wang, Dejun Wang, Fan Wang, Li Huang, Xiaomin Tian, Steve van Nocker, Hua Gao, Xiping Wang
Stilbene synthase (STS) is a key enzyme that catalyzes the biosynthesis of resveratrol compounds and plays an important role in disease resistance. The molecular pathways linking STS with pathogen responses and their regulation are not known. We isolated an STS gene, VaSTS19, from a Chinese wild grape, Vitis amurensis Rupr. cv. "Tonghua-3", and transferred this gene to Arabidopsis. We then generated VaSTS19-expressing Arabidopsis lines and evaluated the functions of VaSTS19 in various pathogen stresses, including powdery mildew, B...
September 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28926102/in-situ-temperature-relationships-of-biochemical-and-stomatal-controls-of-photosynthesis-in-four-lowland-tropical-tree-species
#4
Martijn Slot, Klaus Winter
Net photosynthetic carbon uptake of Panamanian lowland tropical forest species is typically optimal at 30-32°C. The processes responsible for the decrease in photosynthesis at higher temperatures are not fully understood for tropical trees. We determined temperature responses of maximum rates of RuBP-carboxylation (VCMax ) and RuBP-regeneration (JMax ), stomatal conductance (Gs ) and respiration in the light (RLight ) in situ for four lowland tropical tree species in Panama. Gs had the lowest temperature optimum (TOpt ), similar to that of net photosynthesis, and photosynthesis became increasingly limited by stomatal conductance as temperature increased...
September 19, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28924726/overexpression-of-the-transcription-factor-nf-yc9-confers-abscisic-acid-hypersensitivity-in-arabidopsis
#5
Chao Bi, Yu Ma, Xiao-Fang Wang, Da-Peng Zhang
Nuclear factor Y (NF-Y) family proteins are involved in many developmental processes and responses to environmental cues in plants, but whether and how they regulate phytohormone abscisic acid (ABA) signaling need further studies. In the present study, we showed that over-expression of the NF-YC9 gene confers ABA hypersensitivity in both the early seedling growth and stomatal response, while down-regulation of NF-YC9 does not affect ABA response in these processes. We also showed that over-expression of the NF-YC9 gene confers salt and osmotic hypersensitivity in early seedling growth, which is likely to be directly associated with the ABA hypersensitivity...
September 18, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28922104/interleukin-2-interferon-gamma-gene-polymorphisms-in-recurrent-aphthous-stomatitis
#6
Shamsolmoulouk Najafi, Hila Yousefi, Mahsa Mohammadzadeh, Alireza Zare Bidoki, Elham Farhadi, Nima Rezaei
Recurrent aphthous stomatitis (RAS) is the most common oral ulcerative inflammatory disease with unknown etiology. IL-2 and IFN-γ are secreted by Th1 cells and the elevated levels of them have been reported in RAS. Single nucleotide polymorphisms (SNPs) of IL-2 and IFN-γ genes could alter the cytokine production. The aim of this study was to investigate frequencies of IL-2 and IFN-γ alleles and genotypes in a group of patients with minor-RAS (MiRAS). PCR-SSP method used to type genomic DNA of 64 Iranian patients with MiRAS for IL-2 gene (G -330 T) and (G +166 T) and IFN-γ gene at position UTR5644 (A/T)...
2017: Prague Medical Report
https://www.readbyqxmd.com/read/28918539/accelerating-vaccine-development-during-the-2013-2016-west-african-ebola-virus-disease-outbreak
#7
Elizabeth S Higgs, Sheri A Dubey, Beth A G Coller, Jakub K Simon, Laura Bollinger, Robert A Sorenson, Barthalomew Wilson, Martha C Nason, Lisa E Hensley
The Ebola virus disease outbreak that began in Western Africa in December 2013 was unprecedented in both scope and spread, and the global response was slower and less coherent than was optimal given the scale and pace of the epidemic. Past experience with limited localized outbreaks, lack of licensed medical countermeasures, reluctance by first responders to direct scarce resources to clinical research, community resistance to outside interventions, and lack of local infrastructure were among the factors delaying clinical research during the outbreak...
September 17, 2017: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/28916024/contact-stomatitis
#8
Mirtha Cifuentes, Parastoo Davari, Roy S Rogers
Contact stomatitis occurs in up to 10% of the population. Mechanical or chemical irritation, ill-fitting dentures, and dental fillings can induce irritant contact stomatitis. Type I hypersensitivity and type IV hypersensitivity to dental products and foods are frequently responsible for the allergic types of contact stomatitis. We review the causal agents of contact stomatitis, the differential diagnoses, diagnostic testing, and potential treatment.
September 2017: Clinics in Dermatology
https://www.readbyqxmd.com/read/28915459/relationships-of-co2-assimilation-rates-with-exposure-and-flux-based-o3-metrics-in-three-urban-tree-species
#9
Yansen Xu, Bo Shang, Xiangyang Yuan, Zhaozhong Feng, Vicent Calatayud
The relationships of CO2 assimilation under saturated-light conditions (Asat) with exposure- (AOTX, Accumulated Ozone exposure over a hourly Threshold of X ppb) and flux-based (PODY, Phytotoxic Ozone Dose over a hourly threshold Y nmol·m(-2)·s(-1)) O3 metrics was studied on three common urban trees, Fraxinus chinensis (FC), Platanus orientalis (PO) and Robinia pseudoacacia (RP). Parameterizations for a stomatal multiplicative model were proposed for the three species. RP was the species showing lower species-specific maximum stomatal conductance (gmax) and experiencing lower cumulative O3 uptake along the experiment, but in contrast it was the most sensitive to O3...
September 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28912595/analysis-of-vsv-pseudotype-virus-infection-mediated-by-rubella-virus-envelope-proteins
#10
Masafumi Sakata, Hideki Tani, Masaki Anraku, Michiyo Kataoka, Noriyo Nagata, Fumio Seki, Maino Tahara, Noriyuki Otsuki, Kiyoko Okamoto, Makoto Takeda, Yoshio Mori
Rubella virus (RV) generally causes a systemic infection in humans. Viral cell tropism is a key determinant of viral pathogenesis, but the tropism of RV is currently poorly understood. We analyzed various human cell lines and determined that RV only establishes an infection efficiently in particular non-immune cell lines. To establish an infection the host cells must be susceptible and permissible. To assess the susceptibility of individual cell lines, we generated a pseudotype vesicular stomatitis virus bearing RV envelope proteins (VSV-RV/CE2E1)...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28912331/complete-genome-sequences-of-two-vesicular-stomatitis-virus-isolates-collected-in-mexico
#11
Lauro Velazquez-Salinas, Pavel Isa, Steven J Pauszek, Luis L Rodriguez
We report two full-genome sequences of vesicular stomatitis New Jersey virus (VSNJV) obtained by Illumina next-generation sequencing of RNA isolated from epithelial suspensions of cattle naturally infected in Mexico. These genomes represent the first full-genome sequences of vesicular stomatitis New Jersey viruses circulating in Mexico deposited in the GenBank database.
September 14, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28904319/in-vivo-study-of-antifungal-effects-of-low-molecular-weight-chitosan-against-candida-albicans
#12
Zahra Atai, Mohammad Atai, Javid Amini, Negar Salehi
This study investigated the antifungal effects of low-molecular-weight chitosan solution on Candida albicans in denture stomatitis in comparison with nystatin suspension. This randomized, sing-leblind clinical trial included 40 patients diagnosed with denture stomatitis. Patients were divided into two groups, wherein one was treated with chitosan and the other with nystatin for 2 weeks. Changes in the erythematous area were recorded during and after treatment. A palatal smear was obtained for each patient before and after treatment to determine the number of blastospores and mycelia of C...
2017: Journal of Oral Science
https://www.readbyqxmd.com/read/28902955/regulation-of-citrus-responses-to-the-combined-action-of-drought-and-high-temperatures-depends-on-the-severity-of-water-deprivation
#13
Sara I Zandalinas, Damián Balfagón, Vicent Arbona, Aurelio Gómez-Cadenas
Plants grown in natural environment are regularly subjected to different combinations of abiotic stresses. Recent studies revealed that citrus plants subjected to a combination of severe drought and high temperatures displayed specific physiological, hormonal, molecular and metabolic responses. In the present study, we have performed a long-term experiment combining moderate drought and heat in Cleopatra mandarin to evaluate the impact of the stress-sequence, intensity and duration. Our results support previous observation of high sensitivity of Cleopatra mandarin to abiotic stresses that include high temperatures...
September 13, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28901663/antifungal-and-mechanical-properties-of-tissue-conditioner-containing-plant-derived-component-an-in-vitro-study
#14
Yoshihito Naito, Hiromichi Yumoto, Kiran Kumar Hs, Takashi Matsuo, Katsuhiko Hirota, Yoichiro Miyake, Kan Nagao, Yoritoki Tomotake, Ryo Jimbo, Tetsuo Ichikawa
PURPOSE: To evaluate the antifungal activity and mechanical properties of a novel antifungal tissue conditioner containing Juncus powder. MATERIALS AND METHODS: Juncus powder was mixed with GC tissue conditioner at concentrations of 2.5%, 5.0%, and 10.0% by mass. The cylindrical specimens of Juncus-mixed tissue conditioner (dimensions: 10 mm in diameter and 2 and 6 mm in height for antimicrobial and mechanical tests, respectively) were prepared. The specimens placed on the bottom of the 24-well tissue culture plate were cultured with Candida albicans CAD1 for 2 and 4 days...
September 13, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28899961/abscisic-acid-down-regulates-hydraulic-conductance-of-grapevine-leaves-in-isohydric-genotypes-only
#15
Aude Coupel-Ledru, Stephen Tyerman, Diane Masclef, Eric Lebon, Angélique Christophe, Everard J Edwards, Thierry Simonneau
Plants evolved different strategies to cope with water stress. While isohydric species maintain their midday leaf water potential (ΨM) under soil water deficit by closing their stomata, anisohydric species maintain higher stomatal aperture and exhibit substantial reductions in ΨM. It was hypothesized that isohydry is related to a locally higher sensitivity of stomata to the drought-hormone abscisic acid (ABA). Interestingly, recent lines of evidence in Arabidopsis suggested that stomatal responsiveness is also controlled by an ABA action on leaf water supply upstream from stomata...
September 12, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28899960/overexpression-of-ring-domain-e3-ligase-zmxerico1-confers-drought-tolerance-through-regulation-of-aba-homeostasis
#16
Norbert Brugiere, Wenjing Zhang, John Xu, Eric J Scolaro, Cheng Lu, Robel Y Kahsay, Rie Kise, Libby Trecker, Robert W Williams, Salim Hakimi, Xiping Niu, Renee Lafitte, Jeffrey E Habben
Drought stress is one of the main environmental problems encountered by crop growers. Reduction in arable land area and reduced water availability make it paramount to identify and develop strategies to allow crops to be more resilient in water limiting environments. The plant hormone abscisic acid (ABA) plays an important role in the plants' response to drought stress through its control of stomatal aperture and water transpiration; and transgenic modulation of ABA levels therefore represents an attractive avenue to improve the drought tolerance of crops...
September 12, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28899959/impaired-malate-and-fumarate-accumulation-due-the-mutation-of-tonoplast-dicarboxylate-transporter
#17
David B Medeiros, Kallyne Barros, Jessica As Barros, Rebeca P Omena-Garcia, Stéphanie Arrivault, Lilian Vincis Pereira Sanglard, Kelly C Detmann, Willian Batista Silva, Danilo M Daloso, Fabio DaMatta, Adriano Nunes-Nesi, Alisdair R Fernie, Wagner L Araújo
Malate is a central metabolite involved in a multiplicity of plant metabolic pathways, being associated with mitochondrial metabolism and playing significant roles in stomatal movements. Vacuolar malate transport has been characterized at the molecular level and is performed by at least one carrier protein and two channels in Arabidopsis vacuoles. The absence of the Arabidopsis thaliana tonoplast Dicarboxylate Transporter (tDT) in tdt knockout mutant was previously associated with an impaired accumulation of malate and fumarate in leaves...
September 12, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28898992/amphistomatic-leaf-surfaces-independently-regulate-gas-exchange-in-response-to-variations-in-evaporative-demand
#18
Freya Richardson, Timothy J Brodribb, Gregory J Jordan, David Whitehead
The occurrence of amphistomatic leaves (stomata on both surfaces) versus hypostomatic leaves (stomata limited to the lower or abaxial surface) has strong associations with environment. Amphistomy provides the advantage of higher conductance of CO2 for photosynthesis, however, unless the stomata on both leaf surfaces can be independently controlled in response to environmental cues, amphistomy may lead to inefficient gas exchange. While previous studies have found evidence that stomata can operate independently across and between surfaces of dorsiventral leaves, we investigate whether an independent stomatal response can be induced for isobilateral leaves by largely natural conditions...
July 1, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28898654/plant-cell-walls
#19
Herman Höfte, Aline Voxeur
Plants are able to generate large leaf surfaces that act as two-dimensional solar panels with a minimum investment in building material, thanks to a hydrostatic skeleton. This requires high intracellular pressures (up to 1 MPa), which depend on the presence of strong cell walls. The walls of growing cells (also called primary walls), are remarkably able to reconcile extreme tensile strength (up to 100 MPa) with the extensibility necessary for growth. All walled organisms are confronted with this dilemma - the need to balance strength and extensibility - and bacteria, fungi and plants have evolved independent solutions to cope...
September 11, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28895776/evaluation-of-analgesic-effect-and-absorption-of-buprenorphine-after-buccal-administration-in-cats-with-oral-disease
#20
Thaleia-Rengina Stathopoulou, Maria Kouki, Bruno H Pypendop, Atholl Johnston, Serafeim Papadimitriou, Ludovic Pelligand
Objectives The objective of this study was to evaluate the analgesic effect and absorption of buprenorphine after buccal administration in cats with oral disease. Methods Six adult client-owned cats with chronic gingivostomatitis (weighing 5.1 ± 1.1 kg) were recruited for a randomised, prospective, blinded, saline-controlled, crossover study. Pain scores, dental examination, stomatitis score and buccal pH measurement were conducted on day 1 under sedation in all cats. On day 2, animals were randomised into two groups and administered one of the two treatments buccally (group A received buprenorphine 0...
September 1, 2017: Journal of Feline Medicine and Surgery
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