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https://www.readbyqxmd.com/read/28430999/repurposing-quantiferon-for-detection-of-neutralizing-ifn-%C3%AE-autoantibodies-in-patients-with-nontuberculous-mycobacterial-infections
#1
Isabelle Suárez, Clara Lehmann, Henning Gruell, Jessica Graeb, Matthias Kochanek, Gerd Fätkenheuer, Georg Plum, Annelies van Wengen, Esther van de Vosse, Pia Hartmann, Leif G Hanitsch, Jan Rybniker
Nontuberculous mycobacterial (NTM) infections due to autoantibodies targeting IFN-γ are an emerging medical problem. However, case finding is hampered due to highly complex diagnostic procedures not available in routine laboratories. We show that QuantiFERON assays can be exploited as a simple screening tool that may facilitate adequate and timely treatment.
April 20, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28429225/design-of-chemical-conjugate-for-targeted-therapy-of-multiple-sclerosis-based-of-constant-fragment-of-human-antibody-heavy-chain-and-peptoid-analog-of-autoantigen-mog35-55
#2
Y A Lomakin, A V Stepanov, D S Balabashin, N A Ponomarenko, I V Smirnov, A A Belogurov
Elimination of B cells producing autoantibodies to neuroantigens is considered as beneficial in the treatment of multiple sclerosis. Myelin oligodendrocyte glycoprotein (MOG) is a significant autoantigen in multiple sclerosis. It was shown that MOG-like peptoid AMogP3 can bind autoantibodies produced by pathological lymphocytes. We propose a structure of an innovative drug for targeted elimination of the pool of autoreactive B cells responsible for multiple sclerosis pathogenesis; this compound is a complex of peptoid AMogP3 with Fc fragment of human immunoglobulin...
April 21, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28429118/-how-frequent-are-poor-prognostic-markers-in-rheumatoid-arthritis-an-estimate-based-on-three-epidemiologic-cohorts
#3
K Albrecht, A Richter, Y Meissner, D Huscher, L Baganz, K Thiele, M Schneider, A Strangfeld, A Zink
BACKGROUND: Unfavorable prognostic factors-high disease activity, early erosions, and autoantibodies-should be considered when making treatment decisions in rheumatoid arthritis (RA). There are little data on the frequency of individual poor prognostic factors among RA patients in daily care. METHODS: Disease activity (Disease Activity Score, DAS28), erosions, antibodies against citrullinated peptides or rheumatoid factor (ACPA/RF+), previous treatment failure, inflammation markers, and functional disability (FFbH < 70) were defined as prognostic factors...
April 20, 2017: Zeitschrift Für Rheumatologie
https://www.readbyqxmd.com/read/28428630/hinge-deleted-igg4-blocker-therapy-for-acetylcholine-receptor-myasthenia-gravis-in-rhesus-monkeys
#4
Mario Losen, Aran F Labrijn, Vivianne H van Kranen-Mastenbroek, Maarten L Janmaat, Krista G Haanstra, Frank J Beurskens, Tom Vink, Margreet Jonker, Bert A 't Hart, Marina Mané-Damas, Peter C Molenaar, Pilar Martinez-Martinez, Eline van der Esch, Janine Schuurman, Marc H de Baets, Paul W H I Parren
Autoantibodies against ion channels are the cause of numerous neurologic autoimmune disorders. Frequently, such pathogenic autoantibodies have a restricted epitope-specificity. In such cases, competing antibody formats devoid of pathogenic effector functions (blocker antibodies) have the potential to treat disease by displacing autoantibodies from their target. Here, we have used a model of the neuromuscular autoimmune disease myasthenia gravis in rhesus monkeys (Macaca mulatta) to test the therapeutic potential of a new blocker antibody: MG was induced by passive transfer of pathogenic acetylcholine receptor-specific monoclonal antibody IgG1-637...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28428323/insulitis-in-autoantibody-positive-pancreatic-donor-with-history-of-gestational-diabetes-mellitus
#5
Jessica Jackson, Amanda Posgai, Martha Campbell-Thompson, Irina Kusmartseva
No abstract text is available yet for this article.
May 2017: Diabetes Care
https://www.readbyqxmd.com/read/28428120/pathogenesis-of-immune-thrombocytopenia
#6
REVIEW
Sylvain Audia, Matthieu Mahévas, Maxime Samson, Bertrand Godeau, Bernard Bonnotte
Immune thrombocytopenia (ITP) is a rare autoimmune disease due to an abnormal T cell response, notably supported by splenic T follicular helper cells, that stimulates the proliferation and differentiation of autoreactive B cells. The antiplatelet autoantibodies they produce facilitate platelet phagocytosis by macrophages, essentially in the spleen. Macrophages contribute to the perpetuation of the auto-immune response as the main antigen-presenting cell during ITP. CD8(+) T cells also participate to thrombocytopenia by increasing platelet apoptosis...
April 17, 2017: Autoimmunity Reviews
https://www.readbyqxmd.com/read/28427776/autoantibody-biomarkers-for-the-detection-of-serous-ovarian-cancer
#7
Benjamin A Katchman, Diego Chowell, Garrick Wallstrom, Allison F Vitonis, Joshua LaBaer, Daniel W Cramer, Karen S Anderson
Objective The purpose of this study was to identify a panel of novel serum tumor antigen-associated autoantibody (TAAb) biomarkers for the diagnosis of high-grade serous ovarian cancer. METHODS: To detect TAAb we probed high-density programmable protein microarrays (NAPPA) containing 10,247 antigens with sera from patients with serous ovarian cancer (n=30 cases/30 healthy controls) and measured bound IgG. We identified 735 promising tumor antigens and evaluated these with an independent set of serous ovarian cancer sera (n=30 cases/30 benign disease controls/30 healthy controls)...
April 17, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28426042/antibodies-to-h2a-and-h2b-histones-from-the-sera-of-hiv-infected-patients-catalyze-site-specific-degradation-of-these-histones
#8
Svetlana V Baranova, Pavel S Dmitrienok, Nikita V Ivanisenko, Valentina N Buneva, Georgy A Nevinsky
Histones and their post-translational modifications have key roles in chromatin remodeling and gene transcription. Besides intranuclear functions, histones act as damage-associated molecules when they are released into the extracellular space. Administration of histones to animals leads to systemic inflammatory and toxic responses. Autoantibodies with enzymatic activities (abzymes) are distinctive features of some autoimmune and viral diseases. Electrophoretically homogeneous IgGs containing no canonical enzymes were isolated from the sera of HIV-infected patients by chromatography on several affinity sorbents including anti-histone Sepharose...
April 20, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28425751/development-of-red-blood-cell-autoantibodies-following-treatment-with-checkpoint-inhibitors-a-new-class-of-anti-neoplastic-immunotherapeutic-agents-associated-with-immune-dysregulation
#9
Laura L Cooling, John Sherbeck, Jonathon C Mowers, Sheri L Hugan
Ipilimumab, nivolumab, and pembrolizumab represent a new class of immunotherapeutic drugs for treating patients with advanced cancer. Known as checkpoint inhibitors, these drugs act to upregulate the cellular and humoral immune response to tumor antigens by inhibiting T-cell autoregulation. As a consequence, they can be associated with immune-related adverse events (irAEs) due to loss of self-tolerance, including rare cases of immune-related cytopenias. We performed a retrospective clinical chart review, including serologic, hematology, and chemistry laboratory results, of two patients who developed red blood cell (RBC) autoantibodies during treatment with a checkpoint inhibitor...
January 2017: Immunohematology
https://www.readbyqxmd.com/read/28425620/periarticular-bone-loss-in-arthritis-is-induced-by-autoantibodies-against-citrullinated-vimentin
#10
Cecilia Engdahl, Holger Bang, Katharina Dietel, Stefanie C Lang, Ulrike Harre, Georg Schett
Periarticular bone loss is a long known but yet insufficiently understood phenomenon in patients with rheumatoid arthritis. This study investigated whether autoimmunity against citrullinated proteins is causally involved in triggering periarticular bone loss. Periarticular bone loss was studied in the standard antigen induced arthritis (AIA) mouse model with methylated bovine serum albumin (mBSA) as well as modified model with mutated citrullinated vimentin (MCV) alone or in combination with mBSA. Periarticular bone loss, subchondral osteoclastogenesis as well as local expression of cytokines, osteoclast genes and PAD enzymes were assessed after arthritis induction...
April 20, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28425076/monoclonal-gammopathy-of-renal-significance-mgrs-the-characteristics-and-significance-of-a-new-meta-entity
#11
REVIEW
Mariana Ciocchini, Jorge Arbelbide, Carlos G Musso
Monoclonal gammopathy of renal significance (MGRS) is a new nosological group of entities (meta-entity) defined in 2012, whose pathogenesis depends on monoclonal immunoglobulins (Ig) secreted by low-grade lymphoproliferative disorders, which belong to M-protein-related diseases. Renal damage is the result of monoclonal Ig deposit or its activity as autoantibodies, which can compromise any nephronal area. MGRS does not include kidney diseases produced by high-grade lymphoproliferative disorders as well as those whose pathogenesis are independent of monoclonal Ig (such as drug toxicity or metabolic disorders)...
April 19, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28424819/plasma-micrornas-characterising-patients-with-immune-thrombocytopenic-purpura
#12
Bin Zuo, Juping Zhai, Lifang You, Yunxiao Zhao, Jianfeng Yang, Zhen Weng, Lan Dai, Qingyu Wu, Changgeng Ruan, Yang He
Altered microRNA (miRNA) expression has been reported in patients with immune thrombocytopenic purpura (ITP). However, the detailed expression profiling of cell-free circulating miRNAs in ITP patients has not been fully investigated. In this study, we aimed to examine plasma miRNAs in ITP patients and evaluate their diagnostic values. Plasma samples from 74 ITP patients and 58 healthy controls were obtained and allocated into discovery, validation, and therapy-response sets. Initial screen with a miRNA microarray assay identified 23 miRNAs with different levels between ITP patients and healthy controls (>1...
April 20, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28424695/b-cell-tolerance-to-deiminated-histones-in-balb-c-c57bl-6-and-autoimmune-prone-mouse-strains
#13
Nishant Dwivedi, Annica Hedberg, Ying Yi Zheng, Indira Neeli, Minoru Satoh, Laurence Morel, Ole Petter Rekvig, Marko Radic
Deimination, a posttranslational modification of arginine to citrulline carried out by peptidylarginine deiminases, may compromise tolerance of self-antigens. Patients with connective tissue autoimmunity, particularly rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), or Felty's syndrome, present with autoantibodies to deiminated histones (dH), which thus form a category of antibodies to citrullinated protein antigens (ACPA). In general, ACPA are a sensitive diagnostic for RA and may form in response to the release of nuclear chromatin (DNA plus dH) from granulocytes, usually referred to as neutrophil extracellular traps...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28424685/analysis-of-linear-antibody-epitopes-on-factor-h-and-cfhr1-using-sera-of-patients-with-autoimmune-atypical-hemolytic-uremic-syndrome
#14
Eszter Trojnár, Mihály Józsi, Katalin Uray, Dorottya Csuka, Ágnes Szilágyi, Danko Milosevic, Vesna D Stojanović, Brankica Spasojević, Krisztina Rusai, Thomas Müller, Klaus Arbeiter, Kata Kelen, Attila J Szabó, György S Reusz, Satu Hyvärinen, T Sakari Jokiranta, Zoltán Prohászka
INTRODUCTION: In autoimmune atypical hemolytic uremic syndrome (aHUS), the complement regulator factor H (FH) is blocked by FH autoantibodies, while 90% of the patients carry a homozygous deletion of its homolog complement FH-related protein 1 (CFHR1). The functional consequence of FH-blockade is widely established; however, the molecular basis of autoantibody binding and the role of CFHR1 deficiency in disease pathogenesis are still unknown. We performed epitope mapping of FH to provide structural insight in the autoantibody recruitment on FH and potentially CFHR1...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28422826/idiopathic-hypoparathyroidism-with-extensive-intracranial-calcification-in-children-first-report-from-saudi-arabia
#15
Naglaa M Kamal, Hamed A Alghamdi, Abdulrahman A Halabi, Ayman A Bakkar, Ali Algarni, Abdullah Alharbi, Abdulla A Alharthi, Rawan A Alharbi, Laila M Sherief
RATIONALE: Pediatric idiopathic hypoparathyroidism with extensive intracranial calcifications outside the basal ganglia (BG) is extremely rare with less than 10 cases worldwide. PATIENT CONCERNS: An 11-year-old Saudi male child presented with tetany with otherwise normal neurological and other body system examination diagnoses severe hypocalcemia for differential diagnosis. INTERVENTIONS: Further investigations revealed hyperphosphatemia and undetectable serum intact parathyroid hormone...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28421864/selfie-autoimmunity
#16
Haseeb Ahsan
The immune system provides protection to tissues damaged by infectious microrganisms or physical damage. In autoimmune diseases, the immune system recognizes and attacks its own tissues i.e., self-destruction. Various agents such as genetic factors and environmental triggers are thought to play a major role in the development of autoimmune diseases. A common feature of all autoimmune diseases is the presence of autoantibodies and inflammation, including mononuclear phagocytes, autoreactive T lymphocytes and autoantibody producing B cells (plasma cells)...
April 19, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28421817/sequential-gm-csf-inhalation-after-whole-lung-lavage-for-pulmonary-alveolar-proteinosis-a-report-of-five-intractable-cases
#17
Shinya Ohkouchi, Keiichi Akasaka, Toshio Ichiwata, Shu Hisata, Hideya Iijima, Toshinori Takada, Hiroki Tsukada, Hideaki Nakayama, Jun-Ichi Machiya, Toshiya Irokawa, Hiromasa Ogawa, Yoko Shibata, Masakazu Ichinose, Masahito Ebina, Toshihiro Nukiwa, Hajime Kurosawa, Koh Nakata, Ryushi Tazawa
Autoimmune pulmonary alveolar proteinosis (aPAP) is a rare disease characterized by the excessive accumulation of surfactant proteins within the alveolar spaces and by higher titers of autoantibodies to granulocyte/macrophage colony stimulating factor (GM-CSF) in the serum and bronchoalveolar lavage fluid (BALF). The antibodies inhibit the maturation and phagocytosis of alveolar macrophages (AMs). Although the standard therapy for aPAP has been whole-lung lavage (WLL), this procedure is invasive and needs to be repeated for several years...
April 19, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28421431/detection-of-autoantibodies-to-potentially-amyloidogenic-protein-gamma-synuclein-in-the-serum-of-patients-with-amyotrophic-lateral-sclerosis-and-cerebral-circulatory-disorders
#18
A Yu Roman, E A Kovrazhkina, O D Razinskaya, M S Kukharsky, A V Maltsev, R K Ovchinnikov, O A Lytkina, A P Smirnov, A A Moskovtsev, Yu V Borodina, A P Surguchov, A A Ustyugov, N N Ninkina, V I Skvortsova
In this study, we analyzed serum for the presence of antibodies to gamma-synuclein in patients with amyotrophic lateral sclerosis (ALS) compared to the control group of patients with other neurological diseases and healthy control donors. As a result, antibodies against gamma-synuclein are not an ALS-specific feature and have been identified in patients with ALS as well as in the control group patients. Patients with the impaired cerebral circulation showed increased incidence of autoantibodies to gamma-synuclein, yet the difference lacks statistical representativeness due to limited sample size...
January 2017: Doklady. Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28420054/the-prevalence-and-determinants-of-anti-dfs70-autoantibodies-in-an-international-inception-cohort-of-systemic-lupus-erythematosus-patients
#19
M Y Choi, A E Clarke, Y St Pierre, J G Hanly, M B Urowitz, J Romero-Diaz, C Gordon, S-C Bae, S Bernatsky, D J Wallace, J T Merrill, D A Isenberg, A Rahman, E M Ginzler, M Petri, I N Bruce, M A Dooley, P Fortin, D D Gladman, J Sanchez-Guerrero, K Steinsson, R Ramsey-Goldman, M A Khamashta, C Aranow, G S Alarcón, S Manzi, O Nived, A A Zoma, R F van Vollenhoven, M Ramos-Casals, G Ruiz-Irastorza, S S Lim, K C Kalunian, M Inanc, D L Kamen, C A Peschken, S Jacobsen, A Askanase, J Buyon, M Mahler, M J Fritzler
Autoantibodies to dense fine speckles 70 (DFS70) are purported to rule out the diagnosis of SLE when they occur in the absence of other SLE-related autoantibodies. This study is the first to report the prevalence of anti-DFS70 in an early, multinational inception SLE cohort and examine demographic, clinical, and autoantibody associations. Patients were enrolled in the Systemic Lupus International Collaborating Clinics (SLICC) inception cohort within 15 months of diagnosis. The association between anti-DFS70 and multiple parameters in 1137 patients was assessed using univariate and multivariate logistic regression...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/28420047/organ-damage-accrual-and-distribution-in-systemic-lupus-erythematosus-patients-followed-up-for-more-than-10-years
#20
M Taraborelli, I Cavazzana, N Martinazzi, M Grazia Lazzaroni, M Fredi, L Andreoli, F Franceschini, A Tincani
Objective The aim of this study was to determine the prevalence, predictors and progression of organ damage in a monocentric cohort of systemic lupus erythematosus patients with a long follow-up. Organ damage was assessed by the Systemic Lupus International Collaborating Clinics Damage Index one year after diagnosis and every five years. Disease activity was measured by the systemic lupus erythematosus disease activity index (SLEDAI)-2K at the beginning of the follow-up. Univariate and multivariable analyses were used to detect items associated with damage...
January 1, 2017: Lupus
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