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Auto- Immunity Highlights

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https://www.readbyqxmd.com/read/28631225/definition-of-the-upper-reference-limit-for-thyroglobulin-antibodies-according-to-the-national-academy-of-clinical-biochemistry-guidelines-comparison-of-eleven-different-automated-methods
#1
F D'Aurizio, P Metus, A Ferrari, B Caruso, R Castello, D Villalta, A Steffan, K Gaspardo, F Pesente, N Bizzaro, E Tonutti, S Valverde, C Cosma, M Plebani, R Tozzoli
PURPOSE: In the last two decades, thyroglobulin autoantibodies (TgAb) measurement has progressively switched from marker of thyroid autoimmunity to test associated with thyroglobulin (Tg) to verify the presence or absence of TgAb interference in the follow-up of patients with differentiated thyroid cancer. Of note, TgAb measurement is cumbersome: despite standardization against the International Reference Preparation MRC 65/93, several studies demonstrated high inter-method variability and wide variation in limits of detection and in reference intervals...
December 2017: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/28455817/induction-of-il-10-cytokine-and-the-suppression-of-t-cell-proliferation-by-specific-peptides-from-red-cell-band-3-and-in-vivo-effects-of-these-peptides-on-autoimmune-hemolytic-anemia-in-nzb-mice
#2
Abdel-Rahman Youssef, Christopher J Elson
PURPOSE: The anion channel protein band 3 is the main target of the pathogenic red blood cells (RBC) autoantibodies in New Zealand black (NZB) mice. CD4 T cells from NZB mice with autoimmune hemolytic anemia respond to band 3. Previously, we have shown that IL-10 and peptides containing a dominant T cell epitope from red cell band 3 modulate autoimmune hemolytic anemia in NZB mice. Because of the immunoregulatory role of IL-10 in autoimmune diseases, we aim to identify individual band 3 peptides that induce high IL-10 production and simultaneously suppress CD4 T cell proliferation and to investigate the effect intranasal administration of IL-10 producing band 3 peptides on autoantibody responses of NZB mice...
December 2017: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/28455816/a-case-of-sarcoidosis-with-isolated-hepatosplenic-onset-and-development-of-inflammatory-bowel-disease-during-recovery-stage
#3
Moris Sangineto, Chiara Valentina Luglio, Patrizia Suppressa, Carlo Sabbà, Nicola Napoli
Sarcoidosis is a systemic disease characterized by an immune-mediated disorder, which leads to the development of non-caseating granulomas in the involved organs. More than 90% of patients with sarcoidosis present lungs and lymphatic system involvement at onset, while less than 10% has an isolated extrapulmonary localization. Here, we describe the case of an elderly patient with isolated hepato-splenic onset (multiple splenic lesions at imaging and cholestasis), and subsequent pulmonary involvement. The liver biopsy showed the presence of non-caseating granulomas, suggesting sarcoidosis...
December 2017: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/28341873/exploring-the-plasmatic-platelet-activating-factor-acetylhydrolase-activity-in-patients-with-anti-phospholipid-antibodies
#4
Martina Fabris, Adriana Cifù, Cinzia Pistis, Massimo Siega-Ducaton, Desrè Ethel Fontana, Roberta Giacomello, Elio Tonutti, Francesco Curcio
PURPOSE: To explore the role of plasmatic platelet-activating factor acetylhydrolase (PAF-AH), a marker of cardiovascular risk, in patients with anti-phospholipid antibodies (aPL). METHODS: PAF-AH activity was assessed in a series of 167 unselected patients screened for aPL in a context of thrombotic events, risk of thrombosis or obstetric complications and in 77 blood donors. RESULTS: 116/167 patients showed positive results for at least one aPL among IgG/IgM anti-prothrombin/phosphatidylserine (aPS/PT), anti-cardiolipin (aCL), anti-beta2-glycoprotein I (aβ2GPI) or lupus anticoagulant (LAC), while 51/167 patients resulted aPL-negative...
December 2017: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/28324325/the-universe-of-ana-testing-a-case-for-point-of-care-ana-testing
#5
Konstantin N Konstantinov, Robert L Rubin
Testing for total antinuclear antibodies (ANA) is a critical tool for diagnosis and management of autoimmune diseases at both the primary care and subspecialty settings. Repurposing of ANA from a test for lupus to a test for any autoimmune condition has driven the increase in ANA requests. Changes in ANA referral patterns include early or subclinical autoimmune disease detection in patients with low pre-test probability and use of negative ANA results to rule out underlying autoimmune disease. A positive result can lead to further diagnostic considerations...
December 2017: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/28315185/analysis-of-dfs70-pattern-and-impact-on-ana-screening-using-a-novel-hep-2-elite-dfs70-knockout-substrate
#6
Kishore Malyavantham, Lakshmanan Suresh
Indirect immunofluorescence (IIF) using human epithelial cell (HEp-2) substrate is a widely used and the recommended method for screening of antinuclear antibodies (ANA). Dense fine speckled (DFS70) pattern on HEp-2 has been widely reported in various healthy and disease groups. Interpretation of DFS70 pattern can be challenging on a conventional HEp-2 substrate due to its similarity to some of the disease associated patterns. The high prevalence of DFS70 autoantibodies in normal population, lack of association with a particular disease group and a general negative association with systemic and ANA associated autoimmune rheumatic diseases (SARD/AARD) necessitates the confirmation of DFS70 pattern...
December 2017: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/27921237/structure-and-activation-of-the-tsh-receptor-transmembrane-domain
#7
Ricardo Núñez Miguel, Jane Sanders, Jadwiga Furmaniak, Bernard Rees Smith
PURPOSE: The thyroid-stimulating hormone receptor (TSHR) is the target autoantigen for TSHR-stimulating autoantibodies in Graves' disease. The TSHR is composed of: a leucine-rich repeat domain (LRD), a hinge region or cleavage domain (CD) and a transmembrane domain (TMD). The binding arrangements between the TSHR LRD and the thyroid-stimulating autoantibody M22 or TSH have become available from the crystal structure of the TSHR LRD-M22 complex and a comparative model of the TSHR LRD in complex with TSH, respectively...
December 2017: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/27896669/detection-of-autoantibodies-to-dsf70-ledgfp75-in-mexican-hispanics-using-multiple-complementary-assay-platforms
#8
Mónica Vázquez-Del Mercado, Eduardo Gómez-Bañuelos, Rosa Elena Navarro-Hernández, Oscar Pizano-Martinez, Adan Saldaña-Millán, Efrain Chavarria-Avila, Lorena Gonzalez-Rosas, Lilia Andrade-Ortega, Miguel Angel Saavedra, Olga Lidia Vera-Lastra, Luis Javier Jara, Gabriel Medrano-Ramírez, Claudia Cruz-Reyes, Ignacio García-De la Torre, Marta Escarra-Senmarti, Lisiane Maria Enriconi-Dos Anjos, Anamika Basu, Roger Albesa, Michael Mahler, Carlos A Casiano
PURPOSE: Antinuclear autoantibodies (ANA) targeting the dense fine speckled antigen DFS70, also known as lens epithelium-derived growth factor p75 (LEDGF/p75), are attracting attention due to their low frequency in systemic rheumatic diseases but increased frequency in clinical laboratory referrals and healthy individuals (HI). These ANA specifically recognize the stress protein DFS70/LEDGFp75, implicated in cancer, HIV-AIDS, and inflammation. While their frequency has been investigated in various ethnic populations, there is little information on their frequency among Hispanics/Latinos...
December 2017: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/27858337/development-and-evaluation-of-a-standardized-elisa-for-the-determination-of-autoantibodies-against-cn-1a-mup44-nt5c1a-in-sporadic-inclusion-body-myositis
#9
Sabine L Kramp, Dmitry Karayev, Guo Shen, Allan L Metzger, Robert I Morris, Eugene Karayev, Yvonne Lam, Richard M Kazdan, Ger J M Pruijn, Sandra Saschenbrecker, Cornelia Dähnrich, Wolfgang Schlumberger
PURPOSE: Sporadic inclusion body myositis (sIBM) is an autoimmune degenerative disease of the muscle, with inflammatory infiltrates and inclusion vacuoles. Its pathogenesis is not fully understood and the diagnosis is hampered by its imprecise characteristics, at times indistinguishable from other idiopathic inflammatory myopathies such as polymyositis and dermatomyositis. The diagnosis may be assisted by the detection of autoantibodies targeting Mup44, a skeletal muscle antigen identified as cytosolic 5'-nucleotidase 1A (cN-1A, NT5C1A)...
December 2016: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/27844412/anti-rods-rings-autoantibody-seropositivity-does-not-affect-response-to-telaprevir-treatment-for-chronic-hepatitis-c-infection
#10
S John Calise, Nicola Bizzaro, Thuy Nguyen, Danila Bassetti, Brunetta Porcelli, Paolo Almi, Giuseppina Barberio, Giampaola Pesce, Minoru Satoh, Edward K L Chan
PURPOSE: Autoantibodies to intracellular 'rods and rings' structures (anti-rods/rings or anti-RR) are strongly associated with hepatitis C (HCV) patients treated with interferon-α/ribavirin (IFN/RBV) and are linked with non-responsiveness to IFN/RBV or relapse, especially in Italian patients. This is the first study to determine whether there is any correlation of anti-RR with non-responsiveness to IFN/RBV treatment in patients also treated with telaprevir (TPV), one of several new therapies for chronic HCV recently implemented...
December 2016: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/27663425/intraepithelial-lymphocytes-subsets-in-different-forms-of-celiac-disease
#11
M Sánchez-Castañon, B G Castro, M Toca, C Santacruz, M Arias-Loste, P Iruzubieta, J Crespo, Marcos López-Hoyos
AIM: The enumeration of intraepithelial lymphocytes subsets (total, γδ, and CD3(-) IELs) by flow cytometry (FCM), named as IEL lymphogram, constitutes a useful tool for celiac disease (CD) diagnosis. The aim of this study was to quantify IELs by FCM and their diagnostic value to differentiate active, silent and potential CD. METHODS: Prospective study of 60 active and 20 silent CD patients, and 161 controls in which duodenal biopsy and IEL quantification by FCM was performed...
December 2016: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/27629582/infections-as-a-cause-of-autoimmune-rheumatic-diseases
#12
REVIEW
Lazaros I Sakkas, Dimitrios P Bogdanos
Exogenous and endogenous environmental exposures and particularly infections may participate in the breakage of tolerance and the induction of autoimmunity in rheumatic diseases. Response to infections apparently occurs years before clinical manifestations and features of autoimmunity, such as autoantibodies, are detected years before clinical manifestations in autoimmune rheumatic diseases. In this review, we summarize the current evidence for a potential causal link between infectious agents and rheumatoid arthritis, systemic lupus erythematosus, systemic sclerosis, Sjogren's syndrome and ANCA-associated vasculitis...
December 2016: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/27605361/deciphering-the-role-of-dna-methylation-in-multiple-sclerosis-emerging-issues
#13
Maria Sokratous, Efthimios Dardiotis, Zisis Tsouris, Eleni Bellou, Amalia Michalopoulou, Vasileios Siokas, Stylianos Arseniou, Tzeni Stamati, Georgios Tsivgoulis, Dimitrios Bogdanos, Georgios M Hadjigeorgiou
Multiple sclerosis (MS) is an autoimmune inflammatory and neurodegenerative disease of the central nervous system that involves several not yet fully elucidated pathophysiologic mechanisms. There is increasing evidence that epigenetic modifications at level of DNA bases, histones, and micro-RNAs may confer risk for MS. DNA methylation seems to have a prominent role in the epigenetics of MS, as aberrant methylation in the promoter regions across genome may underlie several processes involved in the initiation and development of MS...
December 2016: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/27491295/reactive-oxygen-species-in-organ-specific-autoimmunity
#14
Giulia Di Dalmazi, Jason Hirshberg, Daniel Lyle, Joudeh B Freij, Patrizio Caturegli
Reactive oxygen species (ROS) have been extensively studied in the induction of inflammation and tissue damage, especially as it relates to aging. In more recent years, ROS have been implicated in the pathogenesis of autoimmune diseases. Here, ROS accumulation leads to apoptosis and autoantigen structural changes that result in novel specificities. ROS have been implicated not only in the initiation of the autoimmune response but also in its amplification and spreading to novel epitopes, through the unmasking of cryptic determinants...
December 2016: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/27473142/measurement-of-anti-dfs70-antibodies-in-patients-with-ana-associated-autoimmune-rheumatic-diseases-suspicion-is-cost-effective
#15
Simón Gundín, Juan Irure-Ventura, Esther Asensio, David Ramos, Michael Mahler, Victor Martínez-Taboada, Marcos López-Hoyos
The presence of antinuclear antibodies (ANA) is associated with a wide range of ANA-associated autoimmune rheumatic diseases (AARD). The most commonly method used for the detection of ANA is indirect immunofluorescence (IIF) on HEp-2 cells. This method is very sensitive but unspecific. As a consequence, ANA testing on HEp-2 substrates outside a proper clinical specialist framework may lead to inappropriate referrals to tertiary care specialists and, worst case inappropriate and potentially toxic therapy for the patient...
December 2016: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/27423928/the-ana-reflex-test-as-a-model-for-improving-clinical-appropriateness-in-autoimmune-diagnostics
#16
Elio Tonutti, Nicola Bizzaro, Gabriella Morozzi, Antonella Radice, Luigi Cinquanta, Danilo Villalta, Renato Tozzoli, Marilina Tampoia, Brunetta Porcelli, Martina Fabris, Ignazio Brusca, Maria Grazia Alessio, Giuseppina Barberio, Maria Concetta Sorrentino, Antonio Antico, Danila Bassetti, Desré Ethel Fontana, Tiziana Imbastaro, Daniela Visentini, Giampaola Pesce, Marcello Bagnasco
Reflex tests are widely used in clinical laboratories, for example, to diagnose thyroid disorders or in the follow-up of prostate cancer. Reflex tests for antinuclear antibodies (ANA) have recently gained attention as a way to improve appropriateness in the immunological diagnosis of autoimmune rheumatic diseases and avoid waste of resources. However, the ANA-reflex test is not as simple as other consolidated reflex tests (the TSH-reflex tests or the PSA-reflex tests) because of the intrinsic complexity of the ANA test performed by the indirect immunofluorescence method on cellular substrates...
December 2016: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/27395414/recognition-of-the-dense-fine-speckled-dfs-pattern-remains-challenging-results-from-an-international-internet-based-survey
#17
Chelsea Bentow, Marvin J Fritzler, Eckart Mummert, Michael Mahler
PURPOSE: The dense fine speckled (DFS) pattern as detected by indirect immunofluorescence (IIF) on HEp-2 cells has been associated with several inflammatory diseases but is most commonly observed in individuals that do not have an antinuclear antibody (ANA)-associated rheumatic disease and even in apparently healthy individuals. Consequently, the accurate identification and correct reporting of this IIF pattern is of utmost importance and accordingly has been recognized by several international study groups for the detection of ANA...
December 2016: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/27383232/an-unusual-association-of-three-autoimmune-disorders-celiac-disease-systemic-lupus-erythematosus-and-hashimoto-s-thyroiditis
#18
Viera Boccuti, Antonio Perrone, Alessia D'Introno, Anna Campobasso, Moris Sangineto, Carlo Sabbà
Autoimmune disorders are known to be more frequent in women and often associated each others, but it is rare to see multiple autoimmune diseases in a single patient. Recently, the concept of multiple autoimmune syndrome has been introduced to describe patients with at least three autoimmune diseases. We describe a case of a young man with a clinical history of psychiatric symptoms and celiac disease (CD) who was diagnosed to have other two autoimmune disorders: systemic lupus erythematosus (SLE) and Hashimoto's thyroiditis...
December 2016: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/26935316/the-relative-merits-of-therapies-being-developed-to-tackle-inappropriate-self-directed-complement-activation
#19
Samuel Antwi-Baffour, Ransford Kyeremeh, Jonathan Kofi Adjei, Claudia Aryeh, George Kpentey
The complement system is an enzyme cascade that helps defend against infection. Many complement proteins occur in serum as inactive enzyme precursors or reside on cell surfaces. Complement components have many biologic functions and their activation can eventually damage the plasma membranes of cells and some bacteria. Although a direct link between complement activation and autoimmune diseases has not been found, there is increasing evidence that complement activation significantly contributes to the pathogenesis of a large number of inflammatory diseases that may have autoimmune linkage...
December 2016: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/26878864/nailfold-videocapillaroscopy-and-serum-vegf-levels-in-scleroderma-are-associated-with-internal-organ-involvement
#20
Maria De Santis, Angela Ceribelli, Francesca Cavaciocchi, Chiara Crotti, Marco Massarotti, Laura Belloli, Bianca Marasini, Natasa Isailovic, Elena Generali, Carlo Selmi
PURPOSE: Nailfold videocapillaroscopy (NVC) identifies the microvascular hallmarks of systemic sclerosis (SSc) and vascular endothelial growth factor (VEGF) and may play a pivotal role in the associated vasculopathy. The aim of the present study was to compare NVC alterations with clinical subsets, internal organ involvement, and serum VEGF levels in a cohort of selected SSc cases. METHODS: We studied 44 patients with SSc who were evaluated within 3 months from enrollment by NVC, skin score, severity index, pulmonary function tests, carbon monoxide diffusing capacity (DLCO), echocardiography, pulmonary high-resolution computed tomography (HRCT), gastroesophageal (GE) endoscopy or manometry or X-ray, and serum autoantibodies...
December 2016: Auto- Immunity Highlights
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