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Tolerance induction

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https://www.readbyqxmd.com/read/28724262/phytohormones-and-induction-of-plant-stress-tolerance-and-defense-genes-by-seed-and-foliar-inoculation-with-azospirillum-brasilense-cells-and-metabolites-promote-maize-growth
#1
Josiane Fukami, Francisco Javier Ollero, Manuel Megías, Mariangela Hungria
Azospirillum spp. are plant-growth-promoting bacteria used worldwide as inoculants for a variety of crops. Among the beneficial mechanisms associated with Azospirillum inoculation, emphasis has been given to the biological nitrogen fixation process and to the synthesis of phytohormones. In Brazil, the application of inoculants containing A. brasilense strains Ab-V5 and Ab-V6 to cereals is exponentially growing and in this study we investigated the effects of maize inoculation with these two strains applied on seeds or by leaf spray at the V2...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28721361/role-of-endoplasmic-reticulum-stress-in-learning-and-memory-impairment-and-alzheimer-s-disease-like-neuropathology-in-the-ps19-and-app-swe-mouse-models-of-tauopathy-and-amyloidosis
#2
Denise Isabelle Briggs, Erwin Defensor, Pooneh Memar Ardestani, Bitna Yi, Michelle Halpain, Guy Seabrook, Mehrdad Shamloo
Emerging evidence suggests that endoplasmic reticulum (ER) stress may be involved in the pathogenesis of Alzheimer's disease (AD). Recently, pharmacological modulation of the eukaryotic translation initiation factor-2 (eIF2α) pathway was achieved using an integrated stress response inhibitor (ISRIB). While members of this signaling cascade have been suggested as potential therapeutic targets for neurodegeneration, the biological significance of this pathway has not been comprehensively assessed in animal models of AD...
July 2017: ENeuro
https://www.readbyqxmd.com/read/28720705/conceptual-framework-of-the-eco-physiological-phases-of-insect-diapause-development-justified-by-transcriptomic-profiling
#3
Vladimír Koštál, Tomáš Štětina, Rodolphe Poupardin, Jaroslava Korbelová, Alexander William Bruce
Insects often overcome unfavorable seasons in a hormonally regulated state of diapause during which their activity ceases, development is arrested, metabolic rate is suppressed, and tolerance of environmental stress is bolstered. Diapausing insects pass through a stereotypic succession of eco-physiological phases termed "diapause development." The phasing is varied in the literature, and the whole concept is sometimes criticized as being too artificial. Here we present the results of transcriptional profiling using custom microarrays representing 1,042 genes in the drosophilid fly, Chymomyza costata Fully grown, third-instar larvae programmed for diapause by a photoperiodic (short-day) signal were assayed as they traversed the diapause developmental program...
July 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28719593/long-term-treatment-of-eosinophilic-esophagitis-with-swallowed-topical-corticosteroids-development-and-evaluation-of-a-therapeutic-concept
#4
Thomas Greuter, Christian Bussmann, Ekaterina Safroneeva, Alain M Schoepfer, Luc Biedermann, Stephan R Vavricka, Alex Straumann
OBJECTIVES: Swallowed topical corticosteroids (STCs) are efficacious in inducing and presumably maintaining remission in patients with active eosinophilic esophagitis (EoE). Hitherto, it has not been evaluated whether long-lasting remission can be achieved, and whether treatment can be stopped once patients have achieved this remission. METHODS: Since 2007, EoE patients included into a large database at the Swiss EoE Clinics were put on STCs as induction/maintenance therapy...
July 18, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28718885/virulence-determines-beneficial-trade-offs-in-the-response-of-virus-infected-plants-to-drought-via-induction-of-salicylic-acid
#5
Emmanuel Aguilar, Carmen Cutrona, Francisco J Del Toro, José G Vallarino, Sonia Osorio, María Luisa Pérez-Bueno, Matilde Barón, Bong-Nam Chung, Tomás Canto, Francisco Tenllado
It has been hypothesized that plants can get beneficial trade-offs from viral infections when grown under drought conditions. However, experimental support for a positive correlation between virus-induced drought tolerance and increased host fitness is scarce. We investigated whether increased virulence exhibited by the synergistic interaction involving Potato virus X (PVX) and Plum pox virus (PPV) improves tolerance to drought and host fitness in Nicotiana benthamiana and Arabidopsis thaliana. Infection by the pair PPV/PVX and by PPV expressing the virulence protein P25 of PVX conferred an enhanced drought-tolerant phenotype compared to single infections with either PPV or PVX...
July 18, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28718698/pegging-down-risk-factors-for-peg-asparaginase-hepatotoxicity-in-patients-with-acute-lymphoblastic-leukemia-%C3%A2
#6
Caitlin R Rausch, Bernard L Marini, Lydia L Benitez, Allison Elias, Patrick W Burke, Dale Bixby, Anthony J Perissinotti
Asparaginase is commonly de-emphasized/omitted in adult acute lymphoblastic leukemia regimens due to poor tolerability, including hepatotoxicity (HTX). Adult patients (n = 100) given induction therapy containing pegylated asparaginase (PEG) from January 2008 to February 2016 were evaluated for HTX. Sixteen patients met criteria for HTX (direct bilirubin >3 g/dL). A multivariable model identified body surface area >2m(2) (OR 7.40; 95% CI: 1.73-31.61, p = .007), albumin <3 mg/dL (OR 4.62; 95% CI: 1...
July 18, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28718632/systematic-approaches-to-efficiently-produce-2-3-butanediol-in-a-marine-cyanobacterium
#7
Nicole E Nozzi, Anna E Case, Austin L Carroll, Shota Atsumi
Cyanobacteria have attracted significant interest as a platform for renewable production of fuel and feedstock chemicals from abundant atmospheric carbon dioxide by way of photosynthesis. While great strides have been made in developing this technology in freshwater cyanobacteria, logistical issues remain in scale-up. Use of the cyanobacterium Synechococcus sp. PCC 7002 (7002) as a chemical production chassis could address a number of these issues given the higher tolerance to salt, light, and heat as well as the fast growth rate of 7002 in comparison to traditional model cyanobacteria such as Synechococcus elongatus PCC 7942 and Synechocystis sp...
July 18, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28714868/interval-dosing-with-the-hdac-inhibitor-vorinostat-effectively-reverses-hiv-latency
#8
Nancie M Archin, Jennifer L Kirchherr, Julia Am Sung, Genevieve Clutton, Katherine Sholtis, Yinyan Xu, Brigitte Allard, Erin Stuelke, Angela D Kashuba, Joann D Kuruc, Joseph Eron, Cynthia L Gay, Nilu Goonetilleke, David M Margolis
BACKGROUND: The histone deacetylase (HDAC) inhibitor vorinostat (VOR) can increase HIV RNA expression in vivo within resting CD4+ T cells of aviremic HIV+ individuals. However, while studies of VOR or other HDAC inhibitors have reported reversal of latency, none has demonstrated clearance of latent infection. We sought to identify the optimal dosing of VOR for effective serial reversal of HIV latency. METHODS: In a study of 16 HIV-infected, aviremic individuals, we measured resting CD4+ T cell-associated HIV RNA ex vivo and in vivo following a single exposure to VOR, and then in vivo after a pair of doses separated by 48 or 72 hours, and finally following a series of 10 doses given at 72-hour intervals...
July 17, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28706973/splenocyte-infusion-and-whole-body-irradiation-for-induction-of-peripheral-tolerance-in-porcine-lung-transplantation-modifications-of-the-preconditioning-regime-for-improved-clinical-feasibility
#9
Katharina Jansson, Karla Dreckmann, Wiebke Sommer, Murat Avsar, Jawad Salman, Thierry Siemeni, Ann-Kathrin Knöfel, Linda Pauksch, Jens Gottlieb, Jörg Frühauf, Martin Werner, Danny Jonigk, Martin Strüber, Axel Haverich, Gregor Warnecke
BACKGROUND: Preoperative low-dose whole-body irradiation (IRR) with 1.5 and 7 Gy thymic IRR of the recipient, combined with a perioperative donor splenocyte infusion lead to reliable donor specific peripheral tolerance in our allogeneic porcine lung transplantation model. To reduce the toxicity of this preconditioning regime, modifications of the IRR protocol and their impact on allograft survival were assessed. METHODS: Left-sided single lung transplantation from major histocompatibility complex and sex mismatched donors was performed in 14 adult female minipigs...
July 2017: Transplantation Direct
https://www.readbyqxmd.com/read/28706529/bacillus-licheniformis-sa03-confers-increased-saline-alkaline-tolerance-in-chrysanthemum-plants-by-induction-of-abscisic-acid-accumulation
#10
Cheng Zhou, Lin Zhu, Yue Xie, Feiyue Li, Xin Xiao, Zhongyou Ma, Jianfei Wang
Soil saline-alkalization is a major abiotic stress that leads to low iron (Fe) availability and high toxicity of sodium ions (Na(+)) for plants. It has recently been shown that plant growth promoting rhizobacteria (PGPR) can enhance the ability of plants to tolerate multiple abiotic stresses such as drought, salinity, and nutrient deficiency. However, the possible involvement of PGPR in improving saline-alkaline tolerance of plants and the underlying mechanisms remain largely unknown. In this study, we investigated the effects of Bacillus licheniformis (strain SA03) on the growth of Chrysanthemum plants under saline-alkaline conditions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28704477/comparative-phenotypic-and-functional-analysis-of-migratory-dendritic-cell-subsets-from-human-oral-mucosa-and-skin
#11
Ilona Jennifer Kosten, Rieneke van de Ven, Maria Thon, Susan Gibbs, Tanja D de Gruijl
Antigen exposure to oral mucosa is generally thought to lead to immune tolerance induction. However, very little is known about the subset composition and function of dendritic cells (DC) migrating from human oral mucosa. Here we show that migratory DC from healthy human gingival explants consist of the same phenotypic subsets in the same frequency distribution as DC migrating from human skin. The gingival CD1a+ Langerhans cell and interstitial DC subsets lacked CXCR4 expression in contrast to their cutaneous counterparts, pointing to different migration mechanisms, consistent with previous observations in constructed skin and gingival equivalents...
2017: PloS One
https://www.readbyqxmd.com/read/28702017/acetic-acid-causes-endoplasmic-reticulum-stress-and-induces-the-unfolded-protein-response-in-saccharomyces-cerevisiae
#12
Nozomi Kawazoe, Yukio Kimata, Shingo Izawa
Since acetic acid inhibits the growth and fermentation ability of Saccharomyces cerevisiae, it is one of the practical hindrances to the efficient production of bioethanol from a lignocellulosic biomass. Although extensive information is available on yeast response to acetic acid stress, the involvement of endoplasmic reticulum (ER) and unfolded protein response (UPR) has not been addressed. We herein demonstrated that acetic acid causes ER stress and induces the UPR. The accumulation of misfolded proteins in the ER and activation of Ire1p and Hac1p, an ER-stress sensor and ER stress-responsive transcription factor, respectively, were induced by a treatment with acetic acid stress (>0...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28701016/tolerance-induction-of-horse-allergy-by-horse-contact-with-curly-horses
#13
W Mitlehner, H C Mitlehner
A horse allergic rider completed 60 riding lessons on Curly Horses within six months. This rider has become clinically tolerant to normal horse breeds within this time. This case may indicate that riding and brushing ABCR Curly Horses after 60 riding hours facilitates tolerance induction. Our data indicate that this could be a valid alternative to the common recommendation to strictly avoid horse riding.
July 2017: Pneumologie
https://www.readbyqxmd.com/read/28700815/mesenchymal-stem-cells-and-their-immunosuppressive-role-in-transplantation-tolerance
#14
REVIEW
Pamina Contreras-Kallens, Claudia Terraza, Karina Oyarce, Tania Gajardo, Mauricio Campos-Mora, María Teresa Barroilhet, Carla Álvarez, Ricardo Fuentes, Fernando Figueroa, Maroun Khoury, Karina Pino-Lagos
Since they were first described, mesenchymal stem cells (MSCs) have been shown to have important effector mechanisms and the potential for use in cell therapy. A great deal of research has been focused on unveiling how MSCs contribute to anti-inflammatory responses, including describing several cell populations involved and identifying soluble and other effector molecules. In this review, we discuss some of the contemporary evidence for use of MSCs in the field of immune tolerance, with a special emphasis on transplantation...
July 12, 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28699225/intensive-consolidation-with-g-csf-support-tolerability-safety-reduced-hospitalization-and-efficacy-in-aml-patients-%C3%A2-60-years
#15
Wolfgang R Sperr, Susanne Herndlhofer, Karoline Gleixner, Michael Girschikofsky, Ansgar Weltermann, Sigrid Machherndl-Spandl, Thamer Sliwa, Rainer Poehnl, Veronika Buxhofer-Ausch, Karin Strecker, Gregor Hoermann, Paul Knoebl, Ulrich Jaeger, Klaus Geissler, Michael Kundi, Peter Valent
The aim of this study was to evaluate the efficacy and feasibility of intensified consolidation therapy employing fludarabine and ARA-C in cycle 1 and intermediate-dose ARA-C (IDAC) in cycles 2 through 4, in elderly acute myeloid leukemia (AML) patients and to analyze the effects of pegfilgrastim on the duration of neutropenia, overall toxicity, and hospitalisation-time during consolidation in these patients. Thirty nine elderly patients with de novo AML (median age 69.9 years) who achieved complete remission (CR) after induction-chemotherapy were analyzed...
July 11, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28697651/mucosal-immune-system-of-the-gastrointestinal-tract-maintaining-balance-between-the-good-and-the-bad
#16
Bani Ahluwalia, Maria K Magnusson, Lena Öhman
The gastrointestinal tract (GI tract) is a unique organ inhabited by a range of commensal microbes, while also being exposed to an overwhelming load of antigens in the form of dietary antigens on a daily basis. The GI tract has dual roles in the body, in that it performs digestion and uptake of nutrients while also carrying out the complex and important task of maintaining immune homeostasis, i.e., keeping the balance between the good and the bad. It is equally important that we protect ourselves from reacting against the good, meaning that we stay tolerant to harmless food, commensal bacteria and self-antigens, as well as react with force against the bad, meaning induction of immune responses against harmful microorganisms...
July 12, 2017: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/28696966/defining-a-ventilation-strategy-for-flexible-bronchoscopy-on-mechanically-ventilated-patients-in-the-medical-intensive-care-unit
#17
Yonatan Y Greenstein, Eric Shakespeare, Peter Doelken, Paul H Mayo
BACKGROUND: Flexible bronchoscopy (FB) in intubated patients on mechanical ventilation increases airway resistance. During FB, two ventilatory strategies are possible: maintaining tidal volume (VT) while maintaining baseline CO2 or allowing reduction of VT. The former strategy carries risk of hyperinflation due to expiratory flow limitation with FB. The aim of the authors was too study end expiratory lung volume (EELV) during FB of intubated subjects while limiting VT. METHODS: We studied 16 subjects who were intubated on mechanical ventilation and required FB...
July 2017: Journal of Bronchology & Interventional Pulmonology
https://www.readbyqxmd.com/read/28696300/acetylcholine-producing-nk-cells-attenuate-cns-inflammation-via-modulation-of-infiltrating-monocytes-macrophages
#18
Wei Jiang, Daojing Li, Ranran Han, Chao Zhang, Wei-Na Jin, Kristofer Wood, Qiang Liu, Fu-Dong Shi, Junwei Hao
The nonneural cholinergic system of immune cells is pivotal for the maintenance of immunological homeostasis. Here we demonstrate the expression of choline acetyltransferase (ChAT) and cholinergic enzymes in murine natural killer (NK) cells. The capacity for acetylcholine synthesis by NK cells increased markedly under inflammatory conditions such as experimental autoimmune encephalomyelitis (EAE), in which ChAT expression escalated along with the maturation of NK cells. ChAT(+) and ChAT(-) NK cells displayed distinctive features in terms of cytotoxicity and chemokine/cytokine production...
July 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28694031/in-vivo-induction-of-regulatory-t-cells-promotes-allergen-tolerance-and-suppresses-allergic-contact-dermatitis
#19
Stephen C Balmert, Cara Donahue, John R Vu, Geza Erdos, Louis D Falo, Steven R Little
Allergic contact dermatitis (ACD) is a common T-cell mediated inflammatory skin condition, characterized by an intensely pruritic rash at the site of contact with allergens like poison ivy or nickel. Current clinical treatments use topical corticosteroids, which broadly and transiently suppress inflammation and symptoms of ACD, but fail to address the underlying immune dysfunction. Here, we present an alternative therapeutic approach that teaches the immune system to tolerate contact allergens by expanding populations of naturally suppressive allergen-specific regulatory T cells (Tregs)...
July 8, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28689860/the-expression-pattern-of-hsp70-plays-a-critical-role-in-thermal-tolerance-of-marine-demersal-fish-multilevel-responses-of-paralichthys-olivaceus-and-its-hybrids-p-%C3%A2-olivaceus-%C3%A2-%C3%A2-%C3%A3-p-%C3%A2-dentatus-%C3%A2-to-chronic-and-acute-heat-stress
#20
Yifan Liu, Daoyuan Ma, Chunyan Zhao, Zhizhong Xiao, Shihong Xu, Yongshuang Xiao, Yanfeng Wang, Qinghua Liu, Jun Li
Ocean warming has multifaceted impacts on marine organisms. This study investigated the different responses of Paralichthys olivaceus and the hybrids (P. olivaceus ♀ × P. dentatus ♂) to chronic and acute heat stress. By comparing their survival, behavioural and histological changes, we found that the hybrids possess a better thermal tolerance with a higher cumulative survival rate (CSR), relatively fewer behavioural changes and less gill damage. Moreover, we analysed the relationship between thermal tolerance and the hsp70 expression pattern and found that thermal tolerant species (the hybrids) exhibited higher threshold induction temperature, shorter durations, stronger magnitudes and a delay in hsp70 expression...
June 23, 2017: Marine Environmental Research
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