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https://www.readbyqxmd.com/read/28644900/suppression-of-chikungunya-virus-replication-and-differential-innate-responses-of-human-peripheral-blood-mononuclear-cells-during-co-infection-with-dengue-virus
#1
Mariana Ruiz Silva, José A Aguilar Briseño, Vinit Upasani, Heidi van der Ende-Metselaar, Jolanda M Smit, Izabela A Rodenhuis-Zybert
Dengue and chikungunya are viral diseases transmitted to humans by infected Aedes spp. mosquitoes. With an estimated 390 million infected people per year dengue virus (DENV) currently causes the most prevalent arboviral disease. During the last decade chikungunya virus (CHIKV) has caused large outbreaks and has expanded its territory causing millions of cases in Asia, Africa and America. The viruses share a common mosquito vector and during the acute phase cause similar flu-like symptoms that can proceed to more severe or debilitating symptoms...
June 23, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28643294/-saccharomyces-boulardii-cncm-i-745-influences-the-gut-associated-immune-system
#2
Heike Stier, Stephan C Bischoff
BACKGROUND: The impact of the intestinal microbiome is increasing steadily with regard to the immune function und the defense against pathogens. The medicinal yeast Saccharomyces boulardii CNCM I-745 (S. boulardii) has been used as probiotic for the prevention and treatment of infectious diarrhea since more than 50 years. Meta-analyses confirm the clinical efficacy of S. boulardii to treat diarrhea of various origins in children and adults. METHOD: This review article summarizes experimental studies on molecular and immunological mechanisms which explain the proven clinical efficacy of S...
June 2017: MMW Fortschritte der Medizin
https://www.readbyqxmd.com/read/28643204/host-factors-in-coronavirus-replication
#3
Adriaan H de Wilde, Eric J Snijder, Marjolein Kikkert, Martijn J van Hemert
Coronaviruses are pathogens with a serious impact on human and animal health. They mostly cause enteric or respiratory disease, which can be severe and life threatening, e.g., in the case of the zoonotic coronaviruses causing severe acute respiratory syndrome (SARS) and Middle East Respiratory Syndrome (MERS) in humans. Despite the economic and societal impact of such coronavirus infections, and the likelihood of future outbreaks of additional pathogenic coronaviruses, our options to prevent or treat coronavirus infections remain very limited...
June 23, 2017: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/28643186/current-progress-in-host-innate-and-adaptive-immunity-against-hepatitis-c-virus-infection
#4
REVIEW
Jijing Shi, Yuanyuan Li, Wenxian Chang, Xuexiu Zhang, Fu-Sheng Wang
Hepatitis C virus (HCV) infects more than 170 million people worldwide and is the main cause of chronic hepatitis, liver cirrhosis and hepatocellular carcinoma. Although the newly developed direct-acting antivirals (DAAs) have transformed the treatment of HCV infection, controlling HCV infection on a global scale remains a challenge because of the high cost, low resistance barrier of DAAs and lack of HCV vaccine. The host immune responses associated with HCV infection, especially HCV-specific T cellular immunity, determine the outcome of HCV infection: either acute or chronic infection...
June 22, 2017: Hepatology International
https://www.readbyqxmd.com/read/28642776/regulation-involved-in-colonization-of-intercellular-spaces-of-host-plants-in-ralstonia-solanacearum
#5
REVIEW
Yasufumi Hikichi, Yuka Mori, Shiho Ishikawa, Kazusa Hayashi, Kouhei Ohnishi, Akinori Kiba, Kenji Kai
A soil-borne bacterium Ralstonia solanacearum invading plant roots first colonizes the intercellular spaces of the root, and eventually enters xylem vessels, where it replicates at high levels leading to wilting symptoms. After invasion into intercellular spaces, R. solanacearum strain OE1-1 attaches to host cells and expression of the hrp genes encoding components of the type III secretion system (T3SS). OE1-1 then constructs T3SS and secrets effectors into host cells, inducing expression of the host gene encoding phosphatidic acid phosphatase...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28642716/effects-of-acute-hypoxia-and-reoxygenation-on-physiological-and-immune-responses-and-redox-balance-of-wuchang-bream-megalobrama-amblycephala-yih-1955
#6
Nan Chen, Meng Wu, Guo-Pan Tang, Hui-Juan Wang, Chun-Xiao Huang, Xin-Jie Wu, Yan He, Bao Zhang, Cui-Hong Huang, Hong Liu, Wei-Min Wang, Huan-Ling Wang
To study Megalobrama amblycephala adaption to water hypoxia, the changes in physiological levels, innate immune responses, redox balance of M.amblycephala during hypoxia were investigated in the present study. When M. amblycephala were exposed to different dissolved oxygen (DO) including control (DO: 5.5 mg/L) and acute hypoxia (DO: 3.5 and 1.0 mg/L, respectively), hemoglobin (Hb), methemoglobin (MetHb), glucose, Na(+), succinatedehydrogenase (SDH), lactate, interferon alpha (IFNα), and lysozyme (LYZ), except hepatic glycogen and albumin gradually increased with the decrease of DO level...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28642703/different-regulation-of-interleukin-1-production-and-activity-in-monocytes-and-macrophages-innate-memory-as-an-endogenous-mechanism-of-il-1-inhibition
#7
Mariusz P Madej, Elfi Töpfer, Diana Boraschi, Paola Italiani
Production and activity of interleukin (IL)-1β are kept under strict control in our body, because of its powerful inflammation-promoting capacity. Control of IL-1β production and activity allows IL-1 to exert its defensive activities without causing extensive tissue damage. Monocytes are the major producers of IL-1β during inflammation, but they are also able to produce significant amounts of IL-1 inhibitors such as IL-1Ra and the soluble form of the decoy receptor IL-1R2, in an auto-regulatory feedback loop...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28642689/integrating-neural-circuits-controlling-female-sexual-behavior
#8
REVIEW
Paul E Micevych, Robert L Meisel
The hypothalamus is most often associated with innate behaviors such as is hunger, thirst and sex. While the expression of these behaviors important for survival of the individual or the species is nested within the hypothalamus, the desire (i.e., motivation) for them is centered within the mesolimbic reward circuitry. In this review, we will use female sexual behavior as a model to examine the interaction of these circuits. We will examine the evidence for a hypothalamic circuit that regulates consummatory aspects of reproductive behavior, i...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28642299/dysfunctional-neutrophil-effector-organelle-mobilisation-and-microbicidal-protein-release-in-alcohol-related-cirrhosis
#9
Thomas Henry Tranah, Godhev K Manakkat Vijay, Jennifer M Ryan, Robin Daniel Abeles, Paul Kevin Middleton, Debbie Lindsay Shawcross
BACKGROUND AND AIMS: Patients with alcohol-related cirrhosis (ALD) are prone to infection. Circulating neutrophils in ALD are dysfunctional and predict development of sepsis, organ dysfunction and survival. Neutrophil granules are important effector organelles containing a toxic array of microbicidal proteins, whose controlled release is required to kill micro-organisms whilst minimising inflammation and damage to host tissue. We investigated the role of these granular responses in contributing to immune disarray in ALD...
June 22, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28642294/mhc-class-ii-invariant-chain-peptide-or-gamma-delta-t-cell-depletion-ameliorates-experimental-preeclampsia
#10
Piyali Chatterjee, Valorie L Chiasson, Geetha Seerangan, Eugene De Guzman, Moheb Milad, Kelsey R Bounds, Olga Gasheva, Richard P Tobin, Mohamad Hatahet, Shelley Kopriva, Kathleen A Jones, M Karen Newell-Rogers, Brett Mitchell
Excessive innate immune system activation and inflammation during pregnancy can lead to organ injury and dysfunction and preeclampsia; however, the molecular mechanisms involved are unknown.  We tested the hypothesis that Toll-like receptor activation induces MHC class II invariant chain peptide (CLIP) expression on immune cells, makes them pro-inflammatory, and are necessary to cause preeclampsia-like features in mice.  Treatment with VG1177, a competitive antagonist peptide for CLIP in the groove of MHC class II, was able to both prevent and treat preeclampsia-like features in mice...
June 22, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28642280/granulocytes-as-modulators-of-dendritic-cell-function
#11
REVIEW
Annelot Breedveld, Tom Groot Kormelink, Marjolein van Egmond, Esther de Jong
Effector T cell development is directly driven by APCs, in particular, by antigen-primed dendritic cells (DCs). Depending on the pathogenic stimulus and the microenvironment, DCs induce proliferation and polarization of naive CD4(+) T cells into different effector subsets, such as Th1, Th2, Th17, or regulatory T cells (Tregs). During inflammation, DCs are found in close proximity to other innate immune cells, including all granulocyte subtypes, which potentially influence the immunomodulatory capacities of DCs...
June 22, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28642032/apoptosis-and-necroptosis-as-host-defense-strategies-to-prevent-viral-infection
#12
REVIEW
Megan H Orzalli, Jonathan C Kagan
Antiviral transcriptional responses and regulated cell death are crucial components of the host response to virus infection. However, in contrast to the signaling pathways that promote antiviral transcription, those that initiate cell death following virus infection are less understood. Several recent studies have identified pattern recognition receptors (PRRs) of the mammalian innate immune system that activate cell death pathways. These same receptors also have established roles in the induction of antiviral gene expression...
June 19, 2017: Trends in Cell Biology
https://www.readbyqxmd.com/read/28641918/resistance-of-mice-to-leptospira-infection-and-correlation-with-chemokine-response
#13
R H Domingos, E B Pavanel, E Nakajima, L Schons-Fonseca, R M A Da Costa, M De Franco, E Carvalho, P L Ho, E A Martins, J B Da Silva
Leptospirosis is globally widespread neglected disease, affecting most mammalian species. Clinical signs can be confused with other diseases which make the diagnosis and treatment difficult. Chemokines and cytokines are known for their role in the inflammatory and immune response to infections. The profile determination of chemokines' expressions in the course of infection may elucidate the defense mechanisms of the host and support the search for effective treatment strategies. We investigated the mechanisms of innate immunity through the comparison of chemokines induced during infection with L...
May 26, 2017: Immunobiology
https://www.readbyqxmd.com/read/28639277/serum-derived-transfer-factor-stimulates-the-innate-immune-system-to-improve-survival-traits-in-high-risk-pathogen-scenarios
#14
Bridget V Willeford, Trudy Shapiro-Dunlap, Kenneth O Willeford
Preclinical Research Transfer Factors (TFs) are low molecular weight (<5,000 daltons) biological response mediators. In the present study, a serum derived TF improved the ability of the recipient animal to survive high-risk infectious challenges (salmonellosis and canine parvoviral enteritis (CPV)) by altering the host's cytokine response profile. Mice mortally challenged with 5,000 colony-forming units of Salmonella experienced a group mortality of 73% while mice treated with a single 5 mg dose of the TF demonstrated a significant decrease in morbidity (7%, p ≤ 0...
June 22, 2017: Drug Development Research
https://www.readbyqxmd.com/read/28639176/combined-or-individual-effects-of-dietary-probiotic-pedicoccus-acidilactici-and-nucleotide-on-growth-performance-intestinal-microbiota-hemato-biochemical-parameters-and-innate-immune-response-in-goldfish-carassius-auratus
#15
Nooshin Mehdinejad, Mohammad Reza Imanpour, Valiollah Jafari
This study investigated the effect of dietary supplementation of probiotic Pedicoccus acidilactici and nucleotide (separately or combined) on growth performance, intestinal microbiota, hemato-immunological parameters, and immunity response in goldfish (Carassius auratus). Fish (average weight 5-6 g) were acclimatized and divided into eight experimental diets supplemented with P. acidilactici of different concentrations (0.1, 0.2, and 0.3% diet) and nucleotides (0 and 0.5% diet) for 6 months. Fish fed with experimental diets showed significant differences in terms of final weight, weight gain, feed conversion ratio, daily growth rate, and condition factor when compared to control diet (P < 0...
June 21, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28638380/candida-albicans-yeast-pseudohyphal-and-hyphal-morphogenesis-differentially-affects-immune-recognition
#16
Liliane Mukaremera, Keunsook K Lee, Hector M Mora-Montes, Neil A R Gow
Candida albicans is a human opportunist pathogen that can grow as yeast, pseudohyphae, or true hyphae in vitro and in vivo, depending on environmental conditions. Reversible cellular morphogenesis is an important virulence factor that facilitates invasion of host tissues, escape from phagocytes, and dissemination in the blood stream. The innate immune system is the first line of defense against C. albicans infections and is influenced by recognition of wall components that vary in composition in different morphological forms...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28637899/dietary-salt-exacerbates-experimental-colitis
#17
Alan L Tubbs, Bo Liu, Troy D Rogers, R Balfour Sartor, Edward A Miao
The Western diet is characterized by high protein, sugar, fat, and low fiber intake, and is widely believed to contribute to the incidence and pathogenesis of inflammatory bowel disease (IBD). However, high sodium chloride salt content, a defining feature of processed foods, has not been considered as a possible environmental factor that might drive IBD. We set out to bridge this gap. We examined murine models of colitis on either a high salt diet (HSD) or a low salt diet. We demonstrate that an HSD exacerbates inflammatory pathology in the IL-10-deficient murine model of colitis relative to mice fed a low salt diet...
June 21, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28637878/cd4-t-cell-and-nk-cell-interplay-key-to-regression-of-mhc-class-i-low-tumors-upon-tlr7-8-agonist-therapy
#18
Elien M Doorduijn, Marjolein Sluijter, Daniela C Salvatori, Serenella Silvestri, Saskia Maas, Ramon Arens, Ferry Ossendorp, Sjoerd H van der Burg, Thorbald van Hall
One of the next challenges in cancer immunotherapy is the resistance of tumors to T cell-based treatments through loss of MHC class I. Here, we show that under these circumstances, the Toll-like receptor (TLR)-7/8 ligand imiquimod, but not the TLR3 ligand poly I:C or TLR9 ligand CpG, mediated an effective antitumor response. The rejection of these immune-escaped cancers was mediated by NK cells and CD4(+) T cells, whereas activated CD8(+) T cells were dispensable. Application of the innate immune stimulator at a distant site activated NK cells and thereby elicited tumor-specific T-cell responses in tumor-bearing mice...
June 21, 2017: Cancer Immunology Research
https://www.readbyqxmd.com/read/28637750/interplay-of-pa-x-and-ns1-proteins-in-replication-and-pathogenesis-of-a-temperature-sensitive-2009-pandemic-h1n1-influenza-a-virus
#19
Aitor Nogales, Laura Rodriguez, Marta L DeDiego, David J Topham, Luis Martínez-Sobrido
Influenza A viruses (IAVs) cause seasonal epidemics and occasional pandemics, representing a serious public health concern. It has been described that one mechanism used by some IAV strains to escape the host innate immune responses and modulate virus pathogenicity involves the ability of PA-X and NS1 proteins to inhibit the host protein synthesis in infected cells. It was reported that for the 2009 pandemic H1N1 IAV (pH1N1) only the PA-X protein has this inhibiting capability while the NS1 protein did not...
June 21, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28637738/the-reanimation-low-immune-status-markers-realism-project-a-protocol-for-broad-characterisation-and-follow-up-of-injury-induced-immunosuppression-in-intensive-care-unit-icu-critically-ill-patients
#20
Mary-Luz Rol, Fabienne Venet, Thomas Rimmele, Virginie Moucadel, Pierre Cortez, Laurence Quemeneur, David Gardiner, Andrew Griffiths, Alexandre Pachot, Julien Textoris, Guillaume Monneret
INTRODUCTION: The host response to septic shock is dynamic and complex. A sepsis-induced immunosuppression phase has recently been acknowledged and linked to bad outcomes and increased healthcare costs. Moreover, a marked suppression of the immune response has also been partially described in patients hospitalized in intensive care unit (ICU) for severe trauma or burns. It has been hypothesized that immune monitoring could enable identification of patients who might most benefit from novel, adjunctive immune-stimulating therapies...
June 21, 2017: BMJ Open
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