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https://www.readbyqxmd.com/read/28102858/luminescent-immunoprecipitation-system-lips-for-detection-of-autoantibodies-against-atp4a-and-atp4b-subunits-of-gastric-proton-pump-h-k-atpase-in-atrophic-body-gastritis-patients
#1
Edith Lahner, Cristina Brigatti, Ilaria Marzinotto, Marilia Carabotti, Giulia Scalese, Howard W Davidson, Janet M Wenzlau, Emanuele Bosi, Lorenzo Piemonti, Bruno Annibale, Vito Lampasona
OBJECTIVES: Circulating autoantibodies targeting the H+/K+-ATPase proton pump of gastric parietal cells are considered markers of autoimmune gastritis, whose diagnostic accuracy in atrophic body gastritis, the pathological lesion of autoimmune gastritis, remains unknown. This study aimed to assess autoantibodies against ATP4A and ATP4B subunits of parietal cells H+, K+-ATPase in atrophic body gastritis patients and controls. METHODS: One-hundred and four cases with atrophic body gastritis and 205 controls were assessed for serological autoantibodies specific for ATP4A or ATP4B subunits using luminescent immunoprecipitation system (LIPS)...
January 19, 2017: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/28102430/innate-and-intrinsic-antiviral-immunity-in-drosophila
#2
REVIEW
Assel Mussabekova, Laurent Daeffler, Jean-Luc Imler
The fruit fly Drosophila melanogaster has been a valuable model to investigate the genetic mechanisms of innate immunity. Initially focused on the resistance to bacteria and fungi, these studies have been extended to include antiviral immunity over the last decade. Like all living organisms, insects are continually exposed to viruses and have developed efficient defense mechanisms. We review here our current understanding on antiviral host defense in fruit flies. A major antiviral defense in Drosophila is RNA interference, in particular the small interfering (si) RNA pathway...
January 19, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28102259/elements-of-cancer-immunity-and-the-cancer-immune-set-point
#3
Daniel S Chen, Ira Mellman
Immunotherapy is proving to be an effective therapeutic approach in a variety of cancers. But despite the clinical success of antibodies against the immune regulators CTLA4 and PD-L1/PD-1, only a subset of people exhibit durable responses, suggesting that a broader view of cancer immunity is required. Immunity is influenced by a complex set of tumour, host and environmental factors that govern the strength and timing of the anticancer response. Clinical studies are beginning to define these factors as immune profiles that can predict responses to immunotherapy...
January 18, 2017: Nature
https://www.readbyqxmd.com/read/28102054/extracellular-vesicles-a-key-mediator-to-link-environmental-microbiota-to-airway-immunity
#4
REVIEW
Youngwoo Choi, Hanki Park, Hae Sim Park, Yoon Keun Kim
Asthma is considered the hallmark of chronic airway inflammation, in which several inflammatory cells of the innate and adaptive immune system act together. The disease is thought to be caused by a combination of genetic and environmental factors; however, precise mechanisms for airway inflammation remain unclear. The human microbiota provides an increasingly favored explanation for inflammatory diseases; an altered microbiota composition has been shown to regulate immune responses. However, given the complexity of the microbiota, additional research is needed to elucidate its role in the development of disease...
March 2017: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/28102026/piperine-a-pungent-alkaloid-from-black-pepper-inhibits-b-lymphocyte-activation-and-effector-functions
#5
David A Soutar, Carolyn D Doucette, Robert S Liwski, David W Hoskin
Piperine has several well-documented anti-inflammatory properties; however, little is known regarding its effect on humoral immunity. In this study, we describe the immunosuppressive effect of piperine on B lymphocytes, which are integral to the humoral immune response. Mouse B cells were cultured in the absence or presence of non-cytotoxic concentrations (25, 50, and 100 μM) of piperine during T-dependent or T-independent stimulation. Piperine inhibited B cell proliferation by causing G0/G1 phase cell cycle arrest in association with reduced expression of cyclin D2 and D3...
January 19, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28101351/pro-inflammatory-effect-of-a-traditional-chinese-medicine-formula-with-potent-anti-cancer-activity-in-vitro-impedes-tumor-inhibitory-potential-in-vivo
#6
Lei Xia, Maksym Plachynta, Tangjingjun Liu, Xiao Xiao, Jialei Song, Xiaogang Li, Mu Zhang, Yao Yao, Heng Luo, Xiaojiang Hao, Yaacov Ben-David
Medicinal formulas are a part of the complex discipline of traditional Chinese medicine that has been used for centuries in China and East Asia. These formulas predominantly consist of the extracts isolated from herbal plants, animal parts and medicinal minerals. The present study aimed to investigate the impact of 150 formulas, used as non-prescription drugs in China, on the treatment of cancer. A formula was identified, C54, commonly used to treat sore throats, which exhibited marked growth inhibition in vitro, associated with cell cycle arrest and apoptosis...
December 2016: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28101144/histopathological-findings-in-systemic-sclerosis-related-myopathy-fibrosis-and-microangiopathy-with-lack-of-cellular-inflammation
#7
Claudio Corallo, Maurizio Cutolo, Nila Volpi, Daniela Franci, Margherita Aglianò, Antonio Montella, Chiara Chirico, Stefano Gonnelli, Ranuccio Nuti, Nicola Giordano
OBJECTIVES: The objective of this study was to identify specific histopathological features of skeletal muscle involvement in systemic sclerosis (SSc) patients. METHODS: A total of 35 out of 112 SSc-patients (32%, including 81% female and 68% diffuse scleroderma) presenting clinical, biological and electromyographic (EMG) features of muscle weakness, were included. Patients underwent vastus lateralis biopsy, assessed for individual pathologic features including fibrosis [type I collagen (Coll-I), transforming growth factor β (TGF-β)], microangiopathy [cluster of differentiation 31 (CD31), pro-angiogenic vascular endothelial growth factor A (VEGF-A), anti-angiogenic VEGF-A165b], immune/ inflammatory response [CD4, CD8, CD20, human leucocyte antigens ABC (HLA-ABC)], and membranolytic attack complex (MAC)...
January 2017: Therapeutic Advances in Musculoskeletal Disease
https://www.readbyqxmd.com/read/28100773/targeted-fc%C3%AE-r-mediated-clearance-by-a-biparatopic-bispecific-antibody
#8
Srinath Kasturirangan, G Jonah Rainey, Linda Xu, Xinwei Wang, Alyse Portnoff, Tracy Chen, Christine Fazenbaker, Helen Zhong, Jared Bee, Zhutian Zeng, Craig Jenne, Herren Wu, Changshou Gao
Soluble ligands have commonly been targeted by antibody therapeutics for cancers and other diseases. While monoclonal antibodies targeting such ligands can block their interactions with their cognate receptors, they can also significantly increase the half-life of their ligands by FcRn-mediated antibody recycling, thereby evading ligand renal clearance and requiring increasingly high antibody doses to neutralize the increasing pool of target. To overcome this issue, we generated a bispecific/biparatopic antibody (BiSAb) that targets two different epitopes on IL-6 to block IL-6 mediated signaling...
January 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28100610/the-measles-virus-receptor-slamf1-can-mediate-particle-endocytosis
#9
Daniel Gonçalves-Carneiro, Jane A McKeating, Dalan Bailey
: The signalling lymphocyte activation molecule F1 (SLAMF1) is both a microbial sensor and entry receptor for Measles virus (MeV). Herein, we describe a new role for SLAMF1 to mediate MeV endocytosis that is in contrast with the alternative, and generally accepted, model that MeV genome enters cells only after fusion at the cell surface. We demonstrated that MeV engagement of SLAMF1 induces dramatic but transient morphological changes, most prominently in the formation of membrane blebs, which were shown to co-localise with incoming viral particles, and rearrangement of the actin cytoskeleton in infected cells...
January 18, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28100240/reactivation-of-dormant-anti-tumor-immunity-a-clinical-perspective-of-therapeutic-immune-checkpoint-modulation
#10
REVIEW
Richard Greil, Evelyn Hutterer, Tanja Nicole Hartmann, Lisa Pleyer
In favor of their outgrowth, cancer cells must resist immune surveillance and edit the immune response. Cancer immunoediting is characterized by fundamental changes in the cellular composition and the inflammatory cytokine profiles in the microenvironment of the primary tumor and metastatic niches, with an ever increasing complexity of interactions between tumor cells and the immune system. Recent data suggest that genetic instability and immunoediting are not necessarily disparate processes. Increasing mutational load may be associated with multiple neoepitopes expressed by the tumor cells and thus increased chances for the immune system to recognize and combat these cells...
January 19, 2017: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/28099864/satb1-expression-governs-epigenetic-repression-of-pd-1-in-tumor-reactive-t-cells
#11
Tom L Stephen, Kyle K Payne, Ricardo A Chaurio, Michael J Allegrezza, Hengrui Zhu, Jairo Perez-Sanz, Alfredo Perales-Puchalt, Jenny M Nguyen, Ana E Vara-Ailor, Evgeniy B Eruslanov, Mark E Borowsky, Rugang Zhang, Terri M Laufer, Jose R Conejo-Garcia
Despite the importance of programmed cell death-1 (PD-1) in inhibiting T cell effector activity, the mechanisms regulating its expression remain poorly defined. We found that the chromatin organizer special AT-rich sequence-binding protein-1 (Satb1) restrains PD-1 expression induced upon T cell activation by recruiting a nucleosome remodeling deacetylase (NuRD) complex to Pdcd1 regulatory regions. Satb1 deficienct T cells exhibited a 40-fold increase in PD-1 expression. Tumor-derived transforming growth factor β (Tgf-β) decreased Satb1 expression through binding of Smad proteins to the Satb1 promoter...
January 17, 2017: Immunity
https://www.readbyqxmd.com/read/28099862/neutrophils-in-homeostasis-immunity-and-cancer
#12
REVIEW
José Ángel Nicolás-Ávila, José M Adrover, Andrés Hidalgo
Neutrophils were among the first leukocytes described and visualized by early immunologists. Prominent effector functions during infection and sterile inflammation classically placed them low in the immune tree as rapid, mindless aggressors with poor regulatory functions. This view is currently under reassessment as we uncover new aspects of their life cycle and identify transcriptional and phenotypic diversity that endows them with regulatory properties that extend beyond their lifetime in the circulation...
January 17, 2017: Immunity
https://www.readbyqxmd.com/read/28099860/follicular-dendritic-cell-activation-by-tlr-ligands-promotes-autoreactive-b-cell-responses
#13
Abhishek Das, Balthasar A Heesters, Allison Bialas, Joseph O'Flynn, Ian R Rifkin, Jordi Ochando, Nanette Mittereder, Gianluca Carlesso, Ronald Herbst, Michael C Carroll
A hallmark of autoimmunity in murine models of lupus is the formation of germinal centers (GCs) in lymphoid tissues where self-reactive B cells expand and differentiate. In the host response to foreign antigens, follicular dendritic cells (FDCs) maintain GCs through the uptake and cycling of complement-opsonized immune complexes. Here, we examined whether FDCs retain self-antigens and the impact of this process in autoantibody secretion in lupus. We found that FDCs took up and retained self-immune complexes composed of ribonucleotide proteins, autoantibody, and complement...
January 17, 2017: Immunity
https://www.readbyqxmd.com/read/28099492/priming-cross-protective-bovine-viral-diarrhea-virus-specific-immunity-using-live-vectored-mosaic-antigens
#14
Shehnaz Lokhandwala, Xin Fang, Suryakant D Waghela, Jocelyn Bray, Leo M Njongmeta, Andy Herring, Karim W Abdelsalam, Christopher Chase, Waithaka Mwangi
Bovine viral diarrhea virus (BVDV) plays a key role in bovine respiratory disease complex, which can lead to pneumonia, diarrhea and death of calves. Current vaccines are not very effective due, in part, to immunosuppressive traits and failure to induce broad protection. There are diverse BVDV strains and thus, current vaccines contain representative genotype 1 and 2 viruses (BVDV-1 & 2) to broaden coverage. BVDV modified live virus (MLV) vaccines are superior to killed virus vaccines, but they are susceptible to neutralization and complement-mediated destruction triggered by passively acquired antibodies, thus limiting their efficacy...
2017: PloS One
https://www.readbyqxmd.com/read/28099331/atorvastatin-induced-necrotizing-autoimmune-myositis-an-emerging-dominant-entity-in-patients-with-autoimmune-myositis-presenting-with-a-pure-polymyositis-phenotype
#15
Yves Troyanov, Océane Landon-Cardinal, Marvin J Fritzler, José Ferreira, Ira N Targoff, Eric Rich, Michelle Goulet, Jean-Richard Goulet, Josiane Bourré-Tessier, Yves Robitaille, Julie Drouin, Alexandra Albert, Jean-Luc Senécal
The general aim of this study was to evaluate the disease spectrum in patients presenting with a pure polymyositis (pPM) phenotype. Specific objectives were to characterize clinical features, autoantibodies (aAbs), and membrane attack complex (MAC) in muscle biopsies of patients with treatment-responsive, statin-exposed necrotizing autoimmune myositis (NAM). Patients from the Centre hospitalier de l'Université de Montréal autoimmune myositis (AIM) Cohort with a pPM phenotype, response to immunosuppression, and follow-up ≥3 years were included...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28098775/mammary-gland-involution-provides-a-unique-model-to-study-the-tgf-%C3%AE-cancer-paradox
#16
REVIEW
Qiuchen Guo, Courtney Betts, Nathan Pennock, Elizabeth Mitchell, Pepper Schedin
Transforming Growth Factor-β (TGF-β) signaling in cancer has been termed the "TGF-β paradox", acting as both a tumor suppresser and promoter. The complexity of TGF-β signaling within the tumor is context dependent, and greatly impacted by cellular crosstalk between TGF-β responsive cells in the microenvironment including adjacent epithelial, endothelial, mesenchymal, and hematopoietic cells. Here we utilize normal, weaning-induced mammary gland involution as a tissue microenvironment model to study the complexity of TGF-β function...
January 13, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/28097447/mannose-binding-lectin-mbl-codon-54-rs1800450-polymorphism-predisposes-towards-medium-vessel-vasculitis-in-patients-with-systemic-lupus-erythematosus
#17
Vir Singh Negi, Panneer Devaraju, Durga Prasanna Misra, Vikramraj K Jain, Jignesh Babulal Usdadiya, Paul T Antony, Reena Gulati
Systemic lupus erythematosus (SLE) is a systemic autoimmune disease with multiple etiological factors. Mannose-binding lectin (MBL) plays a key role in innate immunity by activating antibody-independent lectin complement pathway, opsonisation, phagocytosis, and immune complex (IC) clearance. Genetic polymorphisms in the promoter and coding regions of MBL gene affect the circulatory levels and biological activity of MBL. Defects in MBL can lead to defective opsonisation and, hence, hamper clearance of apoptotic debris, the persistence of which can drive autoantibody formation in lupus...
January 17, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28097080/immunoglobulin-m-nephropathy-in-a-patient-with-wilson-s-disease
#18
Zain Ul Abideen, Zoya Sajjad, Asna Haroon Khan, Nadira Mamoon, Muhammad Bilal, Khaja Hameeduddin Mujtaba Quadri
Immunoglobulin M nephropathy (IgMN) is characterized by the deposition of immunoglobulin M in a dominant distribution in the renal glomeruli. Primary immunoglobulin M nephropathy is diagnosed after consistent light microscopy (LM), immunofluorescence (IF), electron microscopy (EM) results, and exclusion of known systemic disorders causing immunoglobulin M deposition in the glomeruli. The secondary disease has been reported with a few conditions though it has never been reported with any primary disease of the liver...
December 13, 2016: Curēus
https://www.readbyqxmd.com/read/28096541/the-mucosal-immune-system-master-regulator-of-bidirectional-gut-brain-communications
#19
REVIEW
Nick Powell, Marjorie M Walker, Nicholas J Talley
Communication between the brain and gut is not one-way, but a bidirectional highway whereby reciprocal signals between the two organ systems are exchanged to coordinate function. The messengers of this complex dialogue include neural, metabolic, endocrine and immune mediators responsive to diverse environmental cues, including nutrients and components of the intestinal microbiota (microbiota-gut-brain axis). We are now starting to understand how perturbation of these systems affects transition between health and disease...
January 18, 2017: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28096486/phage-derived-protein-induces-increased-platelet-activation-and-is-associated-with-mortality-in-patients-with-invasive-pneumococcal-disease
#20
Rahajeng N Tunjungputri, Fredrick M Mobegi, Amelieke J Cremers, Christa E van der Gaast-de Jongh, Gerben Ferwerda, Jacques F Meis, Nel Roeleveld, Stephen D Bentley, Alexander S Pastura, Sacha A F T van Hijum, Andre J van der Ven, Quirijn de Mast, Aldert Zomer, Marien I de Jonge
: To improve our understanding about the severity of invasive pneumococcal disease (IPD), we investigated the association between the genotype of Streptococcus pneumoniae and disease outcomes for 349 bacteremic patients. A pneumococcal genome-wide association study (GWAS) demonstrated a strong correlation between 30-day mortality and the presence of the phage-derived gene pblB, encoding a platelet-binding protein whose effects on platelet activation were previously unknown. Platelets are increasingly recognized as key players of the innate immune system, and in sepsis, excessive platelet activation contributes to microvascular obstruction, tissue hypoperfusion, and finally multiorgan failure, leading to mortality...
January 17, 2017: MBio
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