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Innate immunity

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https://www.readbyqxmd.com/read/28927255/innate-immune-response-of-bovine-mammary-epithelial-cells-to-mycoplasma-bovis
#1
Satoshi Gondaira, Hidetoshi Higuchi, Hidetomo Iwano, Koji Nishi, Takanori Nebu, Keiichi Nakajima, Hajime Nagahata
Mycoplasma species are contagious bacteria and Mycoplasma bovis mastitis is a serious productivity problem on dairy farms. Bovine mammary epithelial cells (bMEC) play an important role in the elimination of pathogens, but the effect of M. bovis on bMEC has not been fully clarified. To better understand the immune response against intramammary infection by M. bovis, we used microarray analysis to examine and profile mRNA expression in bMEC after stimulation with M. bovis. We also compared the effects of M. bovis, Staphylococcus aureus and Escherichia coli on immune-related mRNA expression in bMEC...
September 20, 2017: Journal of Veterinary Science
https://www.readbyqxmd.com/read/28927243/early-endometriosis-in-females-is-directed-by-immune-mediated-estrogen-receptor-alpha-and-il6-cross-talk
#2
Katherine A Burns, Seddon Y Thomas, Katherine J Hamilton, Steven L Young, Donald N Cook, Kenneth S Korach
Endometriosis is a gynecological disease that negatively affects the health of 1 in 10 women. While more information is known about late stage disease, the early initiation of endometriosis and lesion development is poorly understood. Herein, we use a uterine tissue transfer mouse model of endometriosis to examine early disease development and its dependence on estradiol (E2) and estrogen receptor a (ERα) within 72 h of disease initiation. Using wild type and ERα knockout mice as hosts or donors, we find significant infiltration of neutrophils and macrophages into the peritoneal cavity...
September 11, 2017: Endocrinology
https://www.readbyqxmd.com/read/28927136/low-risk-population-among-patients-with-tumor-node-metastasis-stage-iii-iv-oral-squamous-cell-carcinoma
#3
Tohru Ikeda, Sachiko Seki, Mutsunori Fujiwara, Masaaki Matsuura, Yuu Ozaki-Honda, Shuichi Fujita, Hisazumi Ikeda, Masahiro Umeda, Izumi Asahina
A novel system auxiliary to the Union for International Cancer Control classification may allow the prognosis of patients with malignant tumors at similar stages to be predicted, as currently this is challenging. The present study generated a novel system to predict populations at low risk among patients with stage III/IV oral squamous cell carcinoma (OSCC). A total of 41 patients who were diagnosed at stages III/IV OSCC and underwent surgical tumor resection were analyzed. Band-like or follicular lymphocyte infiltration, intraepithelial micro-abscess formation and natural killer (NK) cell infiltration were histopathologically evaluated...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28926774/concurrent-administration-effect-of-antibiotic-and-anti-inflammatory-drugs-on-the-immunotoxicity-of-bacterial-endotoxins
#4
Azza M El Amir, Dalia G Tanious, Hanaa A Mansour
Pseudomonas aeruginosa (P. aeruginosa) is a gram-negative bacterium that causes a variety of diseases in compromised hosts. Bacterial endotoxins such as lipopolysaccharide (LPS) are the major outer surface membrane components that are present in almost all gram-negative bacteria and act as extremely strong stimulators of innate immunity and inflammation of the airway. This study was undertaken to determine the effect of combined administration of Gentamicin (GENT) as an antibiotic and Dexamethasone (DEXA) as an anti-inflammatory drug on some immunological and histological parameters...
September 16, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28926759/instructed-subsets-or-agile-swarms-how-t-helper-cells-may-adaptively-counter-uncertainty-with-variability-and-plasticity
#5
REVIEW
Edward C Schrom, Andrea L Graham
Over recent years, extensive phenotypic variability and plasticity have been revealed among the T-helper cells of the mammalian adaptive immune system, even within clonal lineages of identical antigen specificity. This challenges the conventional view that T-helper cells assort into functionally distinct subsets following differential instruction by the innate immune system. We argue that the adaptive value of coping with uncertainty can reconcile the 'instructed subset' framework with T-helper variability and plasticity...
September 16, 2017: Current Opinion in Genetics & Development
https://www.readbyqxmd.com/read/28926584/transcriptome-analysis-reveals-molecular-anthelmintic-effects-of-procyanidins-in-c-elegans
#6
Verena Spiegler, Andreas Hensel, Jochen Seggewiß, Milena Lubisch, Eva Liebau
Worldwide, more than 1 billion people are affected by infestations with soil-transmitted helminths and also in veterinary medicine helminthiases are a severe threat to livestock due to emerging resistances against the common anthelmintics. Proanthocyanidins have been increasingly investigated for their anthelmintic properties, however, except for an interaction with certain proteins of the nematodes, not much is known about their mode of action. To investigate the anthelmintic activity on a molecular level, a transcriptome analysis was performed in Caenorhabditis elegans after treatment with purified and fully characterized oligomeric procyanidins (OPC)...
2017: PloS One
https://www.readbyqxmd.com/read/28926540/corrigendum-s100-alarmin-induced-innate-immune-programming-protects-newborn-infants-from-sepsis
#7
Thomas Ulas, Sabine Pirr, Beate Fehlhaber, Marie S Bickes, Torsten G Loof, Thomas Vogl, Lara Mellinger, Anna S Heinemann, Johanna Burgmann, Jennifer Schöning, Sabine Schreek, Sandra Pfeifer, Friederike Reuner, Lena Völlger, Martin Stanulla, Maren von Köckritz-Blickwede, Shirin Glander, Katarzyna Barczyk-Kahlert, Constantin S von Kaisenberg, Judith Friesenhagen, Lena Fischer-Riepe, Stefanie Zenker, Joachim L Schultze, Johannes Roth, Dorothee Viemann
No abstract text is available yet for this article.
September 19, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28926431/epigenetic-regulation-of-dendritic-cell-development-and-function
#8
Yuanyuan Tian, Lijun Meng, Yi Zhang
The immune system is characterized by the generation of structurally and functionally heterogeneous immune cells that constitute complex innate and adaptive immunity. This heterogeneity of immune cells results from changes in the expression of genes without altering DNA sequence. To achieve this heterogeneity, immune cells orchestrate the expression and functional status of transcription factor (TF) networks, which can be broadly categorized into 3 classes: pioneer TFs that facilitate initial commitment and differentiation of hematopoietic cells, subset-specific TFs that promote the generation of selected cell lineages, and immune-signaling TFs that regulate specialized function in differentiated cells...
September 2017: Cancer Journal
https://www.readbyqxmd.com/read/28926399/natural-killer-cells-in-hiv-1-infection-and-therapy
#9
Joanna Mikulak, Ferdinando Oriolo, Elisa Zaghi, Clara Di Vito, Domenico Mavilio
: Natural killer (NK) cells are important effectors of innate immunity playing a key role in the eradication and clearance of viral infections. Over the recent years, several studies have shown that HIV-1 pathologically changes NK cell homeostasis and hampers their antiviral effector functions. Moreover, high levels of chronic HIV-1 viremia markedly impair those NK cell regulatory features that normally regulate the cross-talks between innate and adaptive immune responses. These pathogenic events take place early in the infection and are associated with a pathologic redistribution of NK cell subsets that includes the expansion of anergic CD56 NK cells with an aberrant repertoire of activating and inhibitory receptors...
September 18, 2017: AIDS
https://www.readbyqxmd.com/read/28926127/recall-features-and-allorecognition-in-innate-immunity
#10
REVIEW
Hirofumi Uehara, Koichiro Minami, Markus Quante, Yeqi Nian, Timm Heinbokel, Haruhito Azuma, Abdala El Khal, Stefan G Tullius
Alloimmunity traditionally distinguishes short-lived, rapid and non-specific innate immune responses from adaptive immune responses that are characterized by a highly specific response initiated in a delayed fashion. Key players of innate immunity such as natural killer (NK) cells and macrophages present the first-line defense of immunity. The concept of unspecific responses in innate immunity has recently been challenged. The discovery of pattern recognition receptors (PRRs) has demonstrated that innate immune cells respond in a semi-specific fashion through the recognition of pathogen-associated molecular patterns (PAMPs) representing conserved molecular structures shared by large groups of microorganisms...
September 19, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28925980/changes-in-fatty-acid-composition-of-human-milk-in-response-to-cold-like-symptoms-in-the-lactating-mother-and-infant
#11
Andrew S Gardner, Ibrahim A Rahman, Ching T Lai, Anna Hepworth, Naomi Trengove, Peter E Hartmann, Donna T Geddes
Infants rely on their innate immune systems to protect them from infection. Human milk (HM) contains fatty acids (FAs) and monoacylglycerols that are known to exhibit antiviral and antibacterial properties in vitro. The specific fat content of HM may potentially affect the efficacy of this antimicrobial activity. This preliminary study investigates whether the proportions of FA in HM change in response to infections, leading to cold-like symptoms in the mother or infant. Milk samples were obtained from mothers (n = 26) when they and their infants were healthy, and when mother, infant, or both suffered cold-like symptoms...
September 19, 2017: Nutrients
https://www.readbyqxmd.com/read/28925907/atrial-fibrillation-ablation-increases-inflammation-chemokine-modulation-suppresses-activation-of-leukocytes-isolated-after-ablation
#12
Alexandra Lucas, Mohammad Al-Ani, Sriram Ambadapadi, Jordan R Yaron, Donghang Zheng, Adisson Fortunel, Maia Doroton-Guevara, Liying Liu, Sufi Morshed, Jay Fricker, William Miles, Matthew McKillop
AIMS: Atrial fibrillation (AF) ablation is associated with increased circulating markers of inflammation. Innate immune, or inflammation, pathways up-regulate mononuclear cell responses and may increase risk for recurrent arrhythmia. Chemokines and serine protease coagulation pathways both activate innate immune responses. Here, we measured inflammatory markers in peripheral blood samples from patients after cryoballoon and/or radiofrequency pulmonary vein isolation and assessed the capacity for inhibition of chemokine and serine protease pathways to block cell activation...
September 18, 2017: Cardiovascular & Hematological Disorders Drug Targets
https://www.readbyqxmd.com/read/28925389/ptsd-blood-transcriptome-mega-analysis-shared-inflammatory-pathways-across-biological-sex-and-modes-of-trauma
#13
Michael S Breen, Daniel S Tylee, Adam X Maihofer, Thomas C Neylan, Divya Mehta, Elisabeth Binder, Sharon D Chandler, Jonathan L Hess, William S Kremen, Victoria B Risbrough, Christopher H Woelk, Dewleen G Baker, Caroline M Nievergelt, Ming T Tsuang, Joseph D Buxbaum, Stephen J Glatt
Transcriptome-wide screens of peripheral blood during the onset and development of posttraumatic stress disorder (PTSD) indicate widespread immune dysregulation. However, little is known as to whether biological sex and the type of traumatic event influence shared or distinct biological pathways in PTSD. We performed a combined analysis of five independent PTSD blood transcriptome studies covering seven types of trauma in 229 PTSD and 311 comparison individuals to synthesize the extant data. Analyses by trauma type revealed a clear pattern of PTSD gene expression signatures distinguishing interpersonal (IP)-related traumas from combat-related traumas...
September 19, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28925385/fine-tuning-type-i-ifn-signaling-a-new-chapter-in-the-ifn-saga
#14
Hideyuki Yanai, Tadatsugu Taniguchi
Type I interferon (IFN) signaling is critical for intracellular antimicrobial programmes, affecting both innate and adaptive immune responses. The paper recently published in Cell demonstrates a new regulatory mechanism of the type I IFN signaling pathway by histone-lysine N-methyltransferase SETD2.
September 19, 2017: Cell Research
https://www.readbyqxmd.com/read/28925029/loss-of-gas6-and-axl-signaling-results-in-extensive-axonal-damage-motor-deficits-prolonged-neuroinflammation-and-less-remyelination-following-cuprizone-exposure
#15
Alex K Ray, Juwen C DuBois, Ross C Gruber, Hillary M Guzik, Maria E Gulinello, Geoffrey Perumal, Cedric Raine, Lauren Kozakiewicz, Julie Williamson, Bridget Shafit-Zagardo
The TAM (Tyro3, Axl, and MerTK) family of receptor tyrosine kinases (RTKs) and their ligands, Gas6 and ProS1, are important for innate immune responses and central nervous system (CNS) homeostasis. While only Gas6 directly activates Axl, ProS1 activation of Tyro3/MerTK can indirectly activate Axl through receptor heterodimerization. Therefore, we generated Gas6(-/-) Axl(-/-) double knockout (DKO) mice to specifically examine the contribution of this signaling axis while retaining ProS1 signaling through Tyro3 and MerTK...
September 19, 2017: Glia
https://www.readbyqxmd.com/read/28924833/rho-inhibiting-c2in-c3-fusion-toxin-inhibits-chemotactic-recruitment-of-human-monocytes-ex-vivo-and-in-mice-in-vivo
#16
Tobias Martin, Amelie Möglich, Ina Felix, Christina Förtsch, Anne Rittlinger, Annette Palmer, Stephanie Denk, Julian Schneider, Lena Notbohm, Mona Vogel, Hartmut Geiger, Stephan Paschke, Markus Huber-Lang, Holger Barth
Bacterial protein toxins became valuable molecular tools for the targeted modulation of cell functions in experimental pharmacology and attractive therapeutics because of their potent and specific mode of action in human cells. C2IN-C3lim, a recombinant fusion toxin (~50 kDa) of the Rho-inhibiting C3lim from Clostridium (C.) limosum and a non-toxic portion of the C. botulinum C2 toxin (C2IN), is selectively internalized into the cytosol of monocytic cells where C3lim specifically ADP-ribosylates Rho A and -B, thereby inhibiting Rho-mediated signaling...
September 18, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28924581/data-on-the-effects-of-eif6-downmodulation-on-the-proportions-of-innate-and-adaptive-immune-system-cell-subpopulations-and-on-thymocyte-maturation
#17
Nicola Manfrini, Sara Ricciardi, Annarita Miluzio, Maya Fedeli, Alessandra Scagliola, Simone Gallo, Thure Adler, Dirk H Busch, Valerie Gailus-Durner, Helmut Fuchs, Martin Hrabě de Angelis, Stefano Biffo
The data described in this article are related to "High levels of eukaryotic Initiation Factor 6 (eIF6) are required for immune system homeostasis and for steering the glycolytic flux of TCR-stimulated CD4(+) T cells in both mice and humans" (Manfrini et al., in press) [1]. eIF6 is a translation initiation factor required for ribosomal biogenesis (Sanvito et al., 1999) [2] and for proper translational initiation (Gallo and Manfrini, 2015; Miluzio et al., 2016) [3], [4] whose protein abundance requires tight regulation...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28924265/asthma-and-innate-immunity-current-perspective
#18
Waqas Afzal
No abstract text is available yet for this article.
September 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28924041/irak4-kinase-activity-controls-toll-like-receptor-induced-inflammation-through-the-transcription-factor-irf5-in-primary-human-monocytes
#19
Leah Cushing, Aaron Winkler, Scott A Jelinsky, Katherine Lee, Wouter Korver, Rachael Hawtin, Vikram R Rao, Margaret Fleming, Lih-Ling Lin
Interleukin-1 receptor associated kinase 4 (IRAK4) plays a critical role in innate immune signaling by Toll-like receptors (TLRs), and loss of IRAK4 activity in mice and humans increases susceptibility to bacterial infections and causes defects in TLR and IL1 ligand sensing. However, the mechanism by which IRAK4 activity regulates the production of downstream inflammatory cytokines is unclear. Using transcriptomic and biochemical analyses of human monocytes treated with a highly potent and selective inhibitor of IRAK4, we show that IRAK4 kinase activity controls the activation of the transcription factor IRF5, a transcription factor implicated in the pathogenesis of multiple autoimmune diseases...
September 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28923926/host-modification-of-a-bacterial-quorum-sensing-signal-induces-a-phenotypic-switch-in-bacterial-symbionts
#20
Cleo Pietschke, Christian Treitz, Sylvain Forêt, Annika Schultze, Sven Künzel, Andreas Tholey, Thomas C G Bosch, Sebastian Fraune
Bacterial communities colonize epithelial surfaces of most animals. Several factors, including the innate immune system, mucus composition, and diet, have been identified as determinants of host-associated bacterial communities. Here we show that the early branching metazoan Hydra is able to modify bacterial quorum-sensing signals. We identified a eukaryotic mechanism that enables Hydra to specifically modify long-chain 3-oxo-homoserine lactones into their 3-hydroxy-HSL counterparts. Expression data revealed that Hydra's main bacterial colonizer, Curvibacter sp...
September 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
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