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https://www.readbyqxmd.com/read/29668080/control-of-the-ethylene-signaling-pathway-prevents-plant-defenses-during-intracellular-accommodation-of-the-rhizobia
#1
Fathi Berrabah, Thierry Balliau, El Hosseyn Aït-Salem, Jeoffrey George, Michel Zivy, Pascal Ratet, Benjamin Gourion
Massive intracellular populations of symbiotic bacteria, referred to as rhizobia, are housed in legume root nodules. Little is known about the mechanisms preventing the development of defense in these organs although genes such as symCRK and DNF2 of the model legume Medicago truncatula are required for this control after rhizobial internalization in host nodule cells. Here we investigated the molecular basis of the symbiotic control of immunity. Proteomic analysis was performed to compare functional (wild-type) and defending nodules (symCRK)...
April 18, 2018: New Phytologist
https://www.readbyqxmd.com/read/29667662/camel-milk-attenuates-methotrexate-induced-kidney-injury-via-activation-of-pi3k-akt-enos-signaling-and-intervention-with-oxidative-aberrations
#2
Hany H Arab, Samir A Salama, Ibrahim A Maghrabi
Methotrexate (MTX) is a classical chemotherapeutic agent with nephrotoxicity as the most disturbing adverse effect. So far, its underlying molecular mechanisms, particularly PI3K/Akt/eNOS transduction, are inadequately explored. Several antioxidant modalities have been characterized to ameliorate MTX-induced renal injury. In this regard, Camel milk (CM) is a natural product with recognized antioxidant and anti-inflammatory features. Thus, the current study aimed to investigate the potential ameliorating effects of CM in MTX-induced kidney injury in rats...
April 18, 2018: Food & Function
https://www.readbyqxmd.com/read/29666611/genome-sequence-assembly-and-characterization-of-two-metschnikowia-fructicola-strains-used-as-biocontrol-agents-of-postharvest-diseases
#3
Edoardo Piombo, Noa Sela, Michael Wisniewski, Maria Hoffmann, Maria L Gullino, Marc W Allard, Elena Levin, Davide Spadaro, Samir Droby
The yeast Metschnikowia fructicola was reported as an efficient biological control agent of postharvest diseases of fruits and vegetables, and it is the bases of the commercial formulated product "Shemer." Several mechanisms of action by which M. fructicola inhibits postharvest pathogens were suggested including iron-binding compounds, induction of defense signaling genes, production of fungal cell wall degrading enzymes and relatively high amounts of superoxide anions. We assembled the whole genome sequence of two strains of M...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29666477/single-cell-analysis-of-pyroptosis-dynamics-reveals-conserved-gsdmd-mediated-subcellular-events-that-precede-plasma-membrane-rupture
#4
Nathalia M de Vasconcelos, Nina Van Opdenbosch, Hanne Van Gorp, Eef Parthoens, Mohamed Lamkanfi
Pyroptosis is rapidly emerging as a mechanism of anti-microbial host defense, and of extracellular release of the inflammasome-dependent cytokines interleukin (IL)-1β and IL-18, which contributes to autoinflammatory pathology. Caspases 1, 4, 5 and 11 trigger this regulated form of necrosis by cleaving the pyroptosis effector gasdermin D (GSDMD), causing its pore-forming amino-terminal domain to oligomerize and perforate the plasma membrane. However, the subcellular events that precede pyroptotic cell lysis are ill defined...
April 17, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29666281/pathogenic-effects-of-ifit2-and-interferon-%C3%AE-during-fatal-systemic-candida-albicans-infection
#5
Marcin Stawowczyk, Shamoon Naseem, Valeria Montoya, Darren P Baker, James Konopka, Nancy C Reich
A balanced immune response to infection is essential to prevent the pathology and tissue damage that can occur from an unregulated or hyperactive host defense. Interferons (IFNs) are critical mediators of the innate defense to infection, and in this study we evaluated the contribution of a specific gene coding for IFIT2 induced by type I IFNs in a murine model of disseminated Candida albicans Invasive candidiasis is a frequent challenge during immunosuppression or surgical medical interventions, and C. albicans is a common culprit that leads to high rates of mortality...
April 17, 2018: MBio
https://www.readbyqxmd.com/read/29664574/innate-immune-memory-an-evolutionary-perspective
#6
REVIEW
Benjamin Gourbal, Silvain Pinaud, Gerold J M Beckers, Jos W M Van Der Meer, Uwe Conrath, Mihai G Netea
Over the last decades, there was increasing evidence for the presence of innate immune memory in living organisms. In this review, we compare the innate immune memory of various organisms with a focus on phylogenetics. We discuss the acquisition and molecular basis of immune memory and we describe the innate immune memory paradigm and its role in host defense during evolution. The molecular characterization of innate immunological memory in diverse organisms and host-parasite systems reconciles mechanisms with phenomena and paves the way to molecular comprehension of innate immune memory...
May 2018: Immunological Reviews
https://www.readbyqxmd.com/read/29663622/the-role-of-defensive-symbionts-in-host-parasite-coevolution
#7
Christoph Vorburger, Steve J Perlman
Understanding the coevolution of hosts and parasites is a long-standing goal of evolutionary biology. There is a well-developed theoretical framework to describe the evolution of host-parasite interactions under the assumption of direct, two-species interactions, which can result in arms race dynamics or sustained genotype fluctuations driven by negative frequency dependence (Red Queen dynamics). However, many hosts rely on symbionts for defence against parasites. Whilst the ubiquity of defensive symbionts and their potential importance for disease control are increasingly recognized, there is still a gap in our understanding of how symbionts mediate or possibly take part in host-parasite coevolution...
April 16, 2018: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/29661863/-vibrio-cholerae-outer-membrane-vesicles-inhibit-bacteriophage-infection
#8
Tamara Reyes-Robles, Rebecca S Dillard, Lynne S Cairns, Cecilia A Silva-Valenzuela, Max Housman, Afsar Ali, Elizabeth R Wright, Andrew Camilli
Novel preventatives could help in efforts to limit Vibrio cholerae infection and the spread of cholera. Bacteriophage (or phage) treatment has been proposed to be an alternative intervention, given the rapid replication of virulent phages, prey specificity, and relative ease of finding new virulent phages. Phage tropism is dictated in part by the presence of phage receptors on the bacterial surface. While many phages that can kill V. cholerae have been isolated, whether this pathogen is able to defend itself by neutralizing phage binding is unknown...
April 16, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29661829/microrna-27b-modulates-inflammatory-response-and-apoptosis-during-mycobacterium-tuberculosis-infection
#9
Shuxin Liang, Zhigang Song, Yongyan Wu, Yuanpeng Gao, Mingqing Gao, Fayang Liu, Fengyu Wang, Yong Zhang
Mycobacterium tuberculosis poses a significant global health threat. MicroRNAs play an important role in regulating host anti-mycobacterial defense; however, their role in apoptosis-mediated mycobacterial elimination and inflammatory response remains unclear. In this study, we explored the role of microRNA-27b (miR-27b) in murine macrophage responses to M. tuberculosis infection. We uncovered that the TLR-2/MyD88/NF-κB signaling pathway induced the expression of miR-27b and miR-27b suppressed the production of proinflammatory factors and the activity of NF-κB, thereby avoiding an excessive inflammation during M...
April 16, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29661140/the-biochemical-composition-and-transcriptome-of-cotyledons-from-brassica-napus-lines-expressing-the-atgl3-transcription-factor-and-exhibiting-reduced-flea-beetle-feeding
#10
Margaret Gruber, Ushan Alahakoon, Ali Taheri, Nayidu Nagubushana, Rong Zhou, Banyar Aung, Andrew Sharpe, Abdelali Hannoufa, Peta Bonham-Smith, Dwayne D Hegedus D
BACKGROUND: Previously, transgenic trichome-bearing (hairy leaf) Brassica napus lines expressing either the Arabidopsis thaliana GL3 gene (line AtGL3+) [1] or the AtGL3 gene in combination with an RNAi construct to down-regulate TTG1 (line K-5-8) [2] were developed. The leaves of these lines exhibited altered insect feeding (flea beetle) and oviposition (diamondback moth) behaviour compared to the non-transgenic semi-glabrous leaves of B. napus cv. Westar. Interestingly, the cotyledons of these lines remained glabrous, but also showed reduced feeding by flea beetles...
April 16, 2018: BMC Plant Biology
https://www.readbyqxmd.com/read/29660436/in-vitro-study-of-doxorubicin-induced-oxidative-stress-in-spermatogonia-and-immature-sertoli-cells
#11
Amélie R Tremblay, Geraldine Delbes
Pediatric chemotherapy treatments can impair long-term male fertility. Unfortunately, no fertility preservation solution is available for pre-pubertal boys. Studies suggest that doxorubicin, used against pediatric cancers, induces oxidative stress in the testis. However, the targeted testicular cell types remain unknown. The goal of this study was to determine whether doxorubicin can induce oxidative stress in rat spermatogonia (GC-6Spg) and immature Sertoli (Ser-W3) cell lines, and to assess their protection by antioxidants...
April 13, 2018: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29658664/-primary-cilium-acts-as-an-oxygen-sensor-in-pc12-cells
#12
Yuhai Gao, Xinzhu Qi, Jian Zhou, Xin Wang, Keming Chen, Huiping Ma
<b>Objective:</b> To investigate the function of primary cilium as an oxygen sensor in PC12 cells. <b>Methods:</b> The PC12 cells were transfected with IFT88 siRNA. The nuclear translocation of hypoxia inducible factor-1α (HIF-1α), nuclear factor erythroid-2 related factor 2 (Nrf2), and ciliogenesis were observed by immunofluorescence staining; and the mRNA expressions of <i>HIF-1α, Nrf2</i>, vascular endothelial growth factor (<i>VEGF</i>) and superoxide dismutase (<i>SOD</i>) were detected by real-time RT-PCR...
May 25, 2017: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
https://www.readbyqxmd.com/read/29658500/-the-relationship-between-the-family-structure-and-characteristics-of-the-stress-reaction-in-adolescent-addicts
#13
A A Ovchinnikov, A N Sultanova, T Yu Sycheva, T N Mamedov
AIM: To study the relationship between the family structure and characteristics of the response to stress in adolescent addicts. MATERIAL AND METHODS: The study included 65 patients who used psychoactive substances and 42 healthy controls. A set of psychological methods was used. RESULTS AND CONCLUSION: In the group of adolescent addicts, a low result was revealed on the scale 'family cohesion'. A high level of development of such mechanisms of psychological defense as denial, suppression, repression, compensation, substitution, intellectualization and reactive education was diagnosed in both groups...
2018: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/29658272/arsenite-targets-the-ring-finger-domain-of-rbx1-e3-ubiquitin-ligase-to-inhibit-proteasome-mediated-degradation-of-nrf2
#14
Ji Jiang, Lok Ming Tam, Pengcheng Wang, Yinsheng Wang
Activation of the nuclear factor erythroid 2-related factor 2 (Nrf2) antioxidant response signaling pathway is a major mechanism for the cellular defense against oxidative stress. Arsenite, a widespread contaminant in drinking water, is known to induce oxidative stress and activate Nrf2-dependent signaling pathway through stabilization of Nrf2 protein by inhibiting its ubiquitination via the Cul3-Rbx1-Keap1 (cullin 3, RING-box 1, and Kelch-like ECH-associated protein 1) E3 ubiquitin ligase and its degradation by the 26S proteasome, though the underlying mechanism remains elusive...
April 16, 2018: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/29656802/impact-on-the-brain-of-the-inflammatory-response-to-surgery
#15
Sarah Saxena, Mervyn Maze
The brain is both the orchestrator as well as the target of the innate immune system's response to the aseptic trauma of surgery. When trauma-induced inflammation is not appropriately regulated persistent neuro-inflammation interferes with the synaptic plasticity that underlies the learning and memory aspects of cognition. The complications that ensue, include postoperative delirium (POD) and postoperative cognitive dysfunction (POCD) at two poles of a constellation that is now termed perioperative neurocognitive disorders...
April 12, 2018: La Presse Médicale
https://www.readbyqxmd.com/read/29656392/epigenetic-modifications-preserve-the-hyperaccumulator-noccaea-caerulescens-from-ni-geno-toxicity
#16
Mariolina Gullì, Laura Marchi, Rosaria Fragni, Annamaria Buschini, Giovanna Visioli
The Ni hyperaccumulator Noccaea caerulescens has adapted to live in a naturally stressed environment, evolving a complex pattern of traits to cope with adverse conditions. Evidence is accumulating regarding the important role of epigenetic modifications in regulating plant responses to stress. In this study, we present data from the natural "open-field" adaptation of the Ni hyperaccumulator N. caerulescens to serpentine soil and provide the first evidence of the involvement of epigenetic changes in response to the high Ni content present in plant leaves...
April 15, 2018: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/29656378/exopolysaccharides-from-lactobacillus-plantarum-induce-biochemical-and-physiological-alterations-in-tomato-plant-against-bacterial-spot
#17
Juliane Mendes Lemos Blainski, Argus Cesar da Rocha Neto, Eder Carlos Schimidt, José Afonso Voltolini, Márcio José Rossi, Robson Marcelo Di Piero
This study aimed to evaluate the effectiveness of exopolysaccharides (EPS) produced by Lactobacillus plantarum in controlling bacterial spot and eliciting defense mechanisms, and verify alterations in the tomato plant physiological responses. Tomato plants with five definitive leaves were sprayed with EPS, acibenzolar-S-methyl (ASM, positive control), or distilled water (negative control) and inoculated with Xanthomonas gardneri after 3 days. Local and systemic protection was evaluated 7, 15, and 21 days after inoculation...
April 14, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29656328/human-colostrum-action-against-giardia-lamblia-infection-influenced-by-hormones-and-advanced-maternal-age
#18
Queli Lisiane Castro Pereira, Cristiane de Castro Pernet Hara, Rubian Trindade Silva Fernandes, Danny Laura Gomes Fagundes, Aline do Carmo França-Botelho, Maria Aparecida Gomes, Eduardo Luzía França, Adenilda Cristina Honorio-França
Children are more susceptible to Giardia lamblia infection. Cells and hormones contained in human colostrum have an immunoprotective action against giardiasis, but the effects of advanced maternal age on these components are poorly understood. This study analyzed the colostrum of older women to determine melatonin and cortisol levels besides the participation of these hormones on the functional activity of phagocytes against G. lamblia. Colostrum samples were collected from younger (18 to 35 years old) and older (over 36 years old) lactating women...
April 14, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29656046/developmental-expression-profiles-and-thyroidal-regulation-of-cytokines-during-metamorphosis-in-the-amphibian-xenopus-laevis
#19
Melanie J Gallant, Natacha S Hogan
Early life-stages of amphibians rely on the innate immune system for defense against pathogens. While thyroid hormones (TH) are critical for metamorphosis and later development of the adaptive immune system, the role of TH in innate immune system development is less clear. An integral part of the innate immune response are pro-inflammatory cytokines - effector molecules that allow communication between components of the immune system. The objective of this study was to characterize the expression of key pro-inflammatory cytokines, tumor necrosis factor-α (TNFα), interleukin-1β (IL-1β) and interferon-γ (IFN-γ), throughout amphibian development and determine the impacts of thyroidal modulation on their expression...
April 12, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29655789/interleukin-enhanced-binding-factor-2-interacts-with-nlrp3-to-inhibit-the-nlrp3-inflammasome-activation
#20
Jing Jin, Aixin Li, Wenbiao Wang, Jianguo Wu
The activation of the NLRP3 inflammasome is a key process of host immune response that establishes the first line of defense against pathogen infections and cellular stresses, whereas excessive inflammasome activation may damage the hosts, and thus it must be precisely controlled. However, the mechanism underlying the repression of the NLRP3 inflammasome activation remains largely unknown. In this study, by establishing and using a reconstructed NLRP3 inflammasome activation system, we reveal that the NLRP3 inflammasome activation, pro-caspase-1 cleavage, and pro-interleukin-1β (pro-IL-1β) activation are repressed by the interleukin-enhanced binding factor 2 (ILF2)...
April 12, 2018: Biochemical and Biophysical Research Communications
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