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Immune dysregulation

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https://www.readbyqxmd.com/read/29166585/brain-immunity-gut-big-links-between-pregnancy-and-autism
#1
Myka L Estes, A Kimberley McAllister
Although dysregulation of brain, immune, and gut physiology during pregnancy have each been implicated in neuropsychiatric disorders, whether and how these presumably distinct systems are linked to cause disease is unclear. Kim et al. (2017) and Shin Yim et al. (2017) identify a pathway to explain how these aspects of our physiology are deeply and inextricably connected.
November 21, 2017: Immunity
https://www.readbyqxmd.com/read/29163546/glucose-6-phosphatase-catalytic-subunit-3-g6pc3-deficiency-associated-with-autoinflammatory-complications
#2
Anoop Mistry, Thomas Scambler, David Parry, Mark Wood, Gabriela Barcenas-Morales, Clive Carter, Rainer Doffinger, Sinisa Savic
G6PC3 deficiency typically causes severe congenital neutropenia, associated with susceptibility to infections, cardiac and urogenital abnormalities. However, here we describe two boys of Pakistani origin who were found to have G6PC3 deficiency due to c.130 C>T mutation, but who have clinical phenotypes that are typical for a systemic autoinflammatory syndrome. The index case presented with combination of unexplained fevers, severe mucosal ulcers, abdominal symptoms, and inflammatory arthritis. He eventually fully responded to anti-TNF therapy...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29163542/effects-of-food-additives-on-immune-cells-as-contributors-to-body-weight-gain-and-immune-mediated-metabolic-dysregulation
#3
REVIEW
Heitor A Paula Neto, Priscila Ausina, Lilian S Gomez, João G B Leandro, Patricia Zancan, Mauro Sola-Penna
Food additives are compounds used in order to improve food palatability, texture, and shelf life. Despite a significant effort to assure safety of use, toxicological analysis of these substances, generally, rely on their direct toxicity to target organs (liver and kidney) or their genotoxic effects. Much less attention is paid to the effects of these compounds on cells of the immune system. This is of relevance given that metabolic dysregulation and obesity have a strong immune-mediated component. Obese individuals present a state of chronic low-grade inflammation that contributes to the establishment of insulin resistance and other metabolic abnormalities known as the metabolic syndrome...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29163465/b-cell-activating-factor-and-the-b-cell-compartment-in-hiv-siv-infection
#4
REVIEW
Gwenoline Borhis, Maria Trovato, Nada Chaoul, Hany M Ibrahim, Yolande Richard
With the goal to design effective HIV vaccines, intensive studies focused on broadly neutralizing antibodies, which arise in a fraction of HIV-infected people. Apart from identifying new vulnerability sites in the viral envelope proteins, these studies have shown that a fraction of these antibodies are produced by self/poly-reactive B-cells. These findings prompted us to revisit the B-cell differentiation and selection process during HIV/SIV infection and to consider B-cells as active players possibly shaping the helper T-cell program within germinal centers (GCs)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29163443/parasite-derived-proteins-for-the-treatment-of-allergies-and-autoimmune-diseases
#5
REVIEW
Zhenyu Wu, Lifu Wang, Yanlai Tang, Xi Sun
The morbidity associated with atopic diseases and immune dysregulation disorders such as asthma, food allergies, multiple sclerosis, atopic dermatitis, type 1 diabetes mellitus, and inflammatory bowel disease has been increasing all around the world over the past few decades. Although the roles of non-biological environmental factors and genetic factors in the etiopathology have been particularly emphasized, they do not fully explain the increase; for example, genetic factors in a population change very gradually...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29163428/hhv-6a-6b-infection-of-nk-cells-modulates-the-expression-of-mirnas-and-transcription-factors-potentially-associated-to-impaired-nk-activity
#6
Roberta Rizzo, Irene Soffritti, Maria D'Accolti, Daria Bortolotti, Dario Di Luca, Elisabetta Caselli
Natural killer (NK) cells have a critical role in controlling virus infections, and viruses have evolved several mechanisms to escape NK cell functions. In particular, Human herpesvirus 6 (HHV-6) is associated with diseases characterized by immune dysregulation and has been reported to infect NK cells. We recently found that HHV-6 in vitro infection of human thyroid follicular epithelial cells and T-lymphocytes modulates several miRNAs associated with alterations in immune response. Since miRNAs are key regulators of many immune pathways, including NK cell functions, we aimed to study the impact of HHV-6A and -6B in vitro infection on the intracellular mediators correlated to NK cell function...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29163354/diabetes-and-sepsis-risk-recurrence-and-ruination
#7
REVIEW
Lynn M Frydrych, Fatemeh Fattahi, Katherine He, Peter A Ward, Matthew J Delano
Sepsis develops when an infection surpasses local tissue containment. A series of dysregulated physiological responses are generated, leading to organ dysfunction and a 10% mortality risk. When patients with sepsis demonstrate elevated serum lactates and require vasopressor therapy to maintain adequate blood pressure in the absence of hypovolemia, they are in septic shock with an in-hospital mortality rate >40%. With improvements in intensive care treatment strategies, overall sepsis mortality has diminished to ~20% at 30 days; however, mortality continues to steadily climb after recovery from the acute event...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29162741/nuclear-hyaluronidase-2-drives-alternative-splicing-of-cd44-pre-mrna-to-determine-profibrotic-or-antifibrotic-cell-phenotype
#8
Adam C Midgley, Sebastian Oltean, Vincent Hascall, Emma L Woods, Robert Steadman, Aled O Phillips, Soma Meran
The cell surface protein CD44 is involved in diverse physiological processes, and its aberrant function is linked to various pathologies such as cancer, immune dysregulation, and fibrosis. The diversity of CD44 biological activity is partly conferred by the generation of distinct CD44 isoforms through alternative splicing. We identified an unexpected function for the ubiquitous hyaluronan-degrading enzyme, hyaluronidase 2 (HYAL2), as a regulator of CD44 splicing. Standard CD44 is associated with fibrotic disease, and its production is promoted through serine-arginine-rich (SR) protein-mediated exon exclusion...
November 21, 2017: Science Signaling
https://www.readbyqxmd.com/read/29161079/a-new-frontier-in-immunometabolism-cholesterol-in-lung-health-and-disease
#9
Michael B Fessler
The lung has a unique relationship to cholesterol that is shaped by its singular physiology. On the one hand, the lungs receive the full cardiac output and have a predominant dependence on plasma lipoprotein uptake for their cholesterol supply. On the other hand, surfactant lipids, including cholesterol, are continually susceptible to oxidation owing to direct environmental exposure and must be cleared or recycled because of the very narrow biophysical mandates placed upon surfactant lipid composition. Interestingly, increased lipid-laden macrophage "foam cells" have been noted in a wide range of human lung pathologies...
November 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29161075/metabolic-dysregulation-systemic-inflammation-and-pediatric-obesity-related-asthma
#10
Deepa Rastogi, Fernando Holguin
Obesity-related asthma is a distinct pediatric asthma phenotype. It is associated with higher disease burden, lower pulmonary function, and suboptimal response to current asthma medications. Recent studies have made inroads into elucidating its pathophysiology. Systemic immune responses in obese children with asthma are skewed to a nonatopic T-helper cell type 1 (Th1) pattern that correlates with pulmonary function deficits. The prevalence of metabolic dysregulation is also higher among obese children with asthma than among normal-weight children with asthma...
November 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29160910/epithelial-disruptions-but-not-immune-cell-invasion-induced-secretory-dysfunction-following-innate-immune-activation-in-a-novel-model-of-acute-salivary-gland-injury
#11
Abeer Shaalan, Guy Carpenter, Gordon Proctor
BACKGROUND: Salivary gland (SG) injurious agents are all translated into loss of salivation (xerostomia). An association has been established between activation of innate immunity and salivary gland injury and dysfunction. However, it remains unclear how the secretory epithelia respond by halting saliva production. METHODS: C57BL/6 submandibular glands (SMGs) were acutely challenged using a single dose of the innate immune stimulant: polyinosinic-polycytidylic acid (poly (I:C))...
November 21, 2017: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/29158051/the-regulation-of-foxo1-and-its-role-in-disease-progression
#12
REVIEW
Ya-Qi Xing, Ang Li, Yang Yang, Xiao-Xia Li, Li-Nan Zhang, Hui-Cai Guo
Cell proliferation, apoptosis, autophagy, oxidative stress and metabolic dysregulation are the basis of many diseases. Forkhead box transcription factor O1 (FOXO1) changes in response to cellular stimulation and maintains tissue homeostasis during the above-mentioned physiological and pathological processes. Substantial evidences indicate that FOXO1's function depends on the modulation of downstream targets such as apoptosis- and autophagy-associated genes, anti-oxidative stress enzymes, cell cycle arrest genes, and metabolic and immune regulators...
November 17, 2017: Life Sciences
https://www.readbyqxmd.com/read/29156530/microrna-373-facilitates-hsv-1-replication-through-suppression-of-type-i-ifn-response-by-targeting-irf1
#13
Yiting Xie, Songlin He, Jinhua Wang
Herpes simplex virus type 1 (HSV-1) had led to kinds of clinical disorders and became an important cause of morbidity and mortality worldwide, such as herpetic gingivostomatitis in children. Previous studies reported that HSV-1 infection is common and has evolved a variety of mechanisms to evade the immune system, such as dysregulation of miRNAs. However, reports concerning the role of miRNA in HSV-1infection are limited. Here, we report that a host microRNA, miR-373, was significantly upregulated by HSV-1 infection in Hela cells and patients with herpetic gingivostomatitis and it facilitated HSV-1 replication in vitro...
November 15, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29155256/role-of-toll-like-receptors-in-inflammatory-bowel-disease
#14
REVIEW
Nastaran Kordjazy, Arvin Haj-Mirzaian, Arya Haj-Mirzaian, Mohammad Mojtaba Rohani, Erwin W Gelfand, Nima Rezaei, Amir Hossein Abdolghaffari
Inflammatory bowel disease (IBD) is the chronic inflammation of the gastrointestinal tract. Recently, studies of the interplay between the adaptive and innate immune responses have provided a better understanding of the immunopathogenesis of inflammatory disorders such as IBD, as well as identification of novel targets for more potent interventions. Toll-like receptors (TLRs) are a class of proteins that play a significant role in the innate immune system and are involved in inflammatory processes. Activation of TLR signal transduction pathways lead to the induction of numerous genes that function in host defense, including those for inflammatory cytokines, chemokines, and antigen presenting molecules...
November 16, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29154144/multi-platform-omics-analysis-of-human-ebola-virus-disease-pathogenesis
#15
Amie J Eisfeld, Peter J Halfmann, Jason P Wendler, Jennifer E Kyle, Kristin E Burnum-Johnson, Zuleyma Peralta, Tadashi Maemura, Kevin B Walters, Tokiko Watanabe, Satoshi Fukuyama, Makoto Yamashita, Jon M Jacobs, Young-Mo Kim, Cameron P Casey, Kelly G Stratton, Bobbie-Jo M Webb-Robertson, Marina A Gritsenko, Matthew E Monroe, Karl K Weitz, Anil K Shukla, Mingyuan Tian, Gabriele Neumann, Jennifer L Reed, Harm van Bakel, Thomas O Metz, Richard D Smith, Katrina M Waters, Alhaji N'jai, Foday Sahr, Yoshihiro Kawaoka
The pathogenesis of human Ebola virus disease (EVD) is complex. EVD is characterized by high levels of virus replication and dissemination, dysregulated immune responses, extensive virus- and host-mediated tissue damage, and disordered coagulation. To clarify how host responses contribute to EVD pathophysiology, we performed multi-platform 'omics analysis of peripheral blood mononuclear cells and plasma from EVD patients. Our results indicate that EVD molecular signatures overlap with those of sepsis, imply that pancreatic enzymes contribute to tissue damage in fatal EVD, and suggest that Ebola virus infection may induce aberrant neutrophils whose activity could explain hallmarks of fatal EVD...
November 15, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/29153601/neurodegenerative-diseases-the-immunological-perspective
#16
REVIEW
Monica Molteni, Carlo Rossetti
Increasing evidence supports the notion that the neurodegenerative process occurring in Alzheimer's disease (AD), Parkinson's disease (PD) and Amyotrophic Lateral Sclerosis (ALS) does not only imply the neuronal compartment but also involves a strong interaction with the immunological cells of the Central Nervous System (CNS), primarily microglia. Starting from the observation that the neurodegenerative disorders are frequent in elderly individuals, who have an immunological background that possibly favors this process, it is evident that a dysregulation of innate immune response triggered by misfolded and aggregated proteins, or by endogenous molecules released by injured neurons, directly contributes to disease pathogenesis and progression...
December 15, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/29153034/advances-in-maldi-mass-spectrometry-within-drug-discovery
#17
Dale S Cornett, Michael D Scholle
Inhibition of NK and effector T-cell functions and activation of regulatory cell populations are the main immunosuppressive effects of indoleamine-2,3-dioxygenase1 (IDO1). By converting tryptophan (Trp) into kynurenine (Kyn), IDO1 is involved in the immune response homeostasis, and its dysregulated expression is described in immune-related pathologies, as tumors that hijack it to evade immune destruction. Thereby, IDO1 inhibitors are being developed to stimulate antitumor immune responses. Existing and standard quantitation methods of IDO1 substrate and metabolite(s) are based on the total level of Trp and its metabolites determined by liquid chromatography tandem mass spectrometry analysis in human plasma, cerebrospinal fluid, and brain...
December 2017: SLAS Discovery
https://www.readbyqxmd.com/read/29152655/tgf%C3%A2-%C3%AE-1-expression-in-adults-with-non%C3%A2-traumatic-osteonecrosis-of-the-femoral-head
#18
Jun Tao, Bin Dong, Li-Xin Yang, Ke-Qing Xu, Shuai Ma, Jun Lu
Non-traumatic osteonecrosis of the femoral head (NONFH) is a common clinical osteoarthropathy. The present study aimed to investigate the association between transforming growth factor β1 (TGF‑β1) and NONFH. Femoral head specimens were collected from patients with NONFH. Patients with traumatic osteonecrosis served as the control. Hematoxylin and eosin (H&E) staining was used to visualize the bone tissue architecture. Immunohistochemistry and densitometry were performed to quantify TGF‑β1 expression in tissues...
October 19, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29150944/toll-like-receptor-signaling-pathway-as-a-potential-therapeutic-target-in-colorectal-cancer
#19
REVIEW
Reyhaneh Moradi-Marjaneh, Seyed Mahdi Hassanian, Hamid Fiuji, Saman Soleimanpour, Gordon A Ferns, Amir Avan, Majid Khazaei
Toll like receptor (TLR) signaling is involved in activating innate and adaptive immune responses and plays a critical role in inflammation-induced diseases such as colorectal cancer (CRC). Dysregulation of this signaling pathway can result in disturbance of epithelial layer hemostasis, chronic inflammatory, excessive repair responses and development of CRC. There is now substantial evidence for the benefit of targeting of this pathway in cancer treatment, and several agents have been approved, such as BCG (Bacillus Calmette Guérin), MPL (monophosphoryl lipid A) and imiquimod...
November 18, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29149942/mechanisms-of-organ-dysfunction-in-sepsis
#20
REVIEW
Rachel Pool, Hernando Gomez, John A Kellum
Sepsis-associated organ dysfunction involves multiple responses to inflammation, including endothelial and microvascular dysfunction, immune and autonomic dysregulation, and cellular metabolic reprogramming. The effect of targeting these mechanistic pathways on short- and long-term outcomes depends highly on the timing of therapeutic intervention. Furthermore, there is a need to understand the adaptive or maladaptive character of these mechanisms, to discover phase-specific biomarkers to guide therapy, and to conceptualize these mechanisms in terms of resistance and tolerance...
January 2018: Critical Care Clinics
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