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Autoantibody

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https://www.readbyqxmd.com/read/28454087/evaluation-of-autoantibody-signatures-in-meningioma-patients-using-human-proteome-arrays
#1
Shabarni Gupta, Shuvolina Mukherjee, Parvez Syed, Narendra Goud Pandala, Saket Choudhary, Vedita Anand Singh, Namrata Singh, Heng Zhu, Sridhar Epari, Santosh B Noronha, Aliasgar Moiyadi, Sanjeeva Srivastava
Meningiomas are one of the most common tumors of the Central nervous system (CNS). This study aims to identify the autoantibody biomarkers in meningiomas using high-density human proteome arrays (~17,000 full-length recombinant human proteins). Screening of sera from 15 unaffected healthy individuals, 10 individuals with meningioma grade I and 5 with meningioma grade II was performed. This comprehensive proteomics based investigation revealed the dysregulation of 489 and 104 proteins in grades I and II of meningioma, respectively, along with the enrichment of several signalling pathways, which might play a crucial role in the manifestation of the disease...
April 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28453702/a-phase-2-randomized-double-blind-placebo-%C3%A2-controlled-study-of-chemo-immunotherapy-combination-using-motolimod-with-pegylated-liposomal-doxorubicin-in-recurrent-or-persistent-ovarian-cancer-a-gynecologic-oncology-group-partners-study
#2
B J Monk, M F Brady, C Aghajanian, H A Lankes, T Rizack, J Leach, J M Fowler, R Higgins, P Hanjani, M Morgan, R Edwards, W Bradley, T Kolevska, P Foukas, E M Swisher, K S Anderson, R Gottardo, J K Bryan, M Newkirk, K L Manjarrez, R S Mannel, R M Hershberg, G Coukos
Background: A phase 2, randomized, placebo-controlled trial was conducted in women with recurrent epithelial ovarian carcinoma to evaluate the efficacy and safety of motolimod-a Toll-like receptor 8 (TLR8) agonist that stimulates robust innate immune responses-combined with pegylated liposomal doxorubicin (PLD), a chemotherapeutic that induces immunogenic cell death. Patients and methods: Women with ovarian, fallopian tube, or primary peritoneal carcinoma were randomized 1 : 1 to receive PLD in combination with blinded motolimod or placebo...
May 1, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28449401/chinese-consensus-on-the-diagnosis-and-management-of-autoimmune-hepatitis-2015-chinese-society-of-hepatology-chinese-society-of-gastroenterology-chinese-society-of-infectious-diseases
#3
Xiong Ma, De Kai Qiu
Autoimmune hepatitis (AIH) is the inflammation of liver parenchyma mediated by the autoimmune response targeting hepatocytes, and is characterized by positive serum autoantibodies, high levels of immunoglobulin G (IgG) and/or hypergammaglobulinemia, and interface hepatitis in liver histology.
April 27, 2017: Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28448609/six-autoantibodies-associated-with-autoimmune-encephalitis-are-not-detectable-in-the-cerebrospinal-fluid-of-suicide-attempters
#4
Johan Fernström, Åsa Westrin, Cécile Grudet, Lil Träskman-Bendz, Lena Brundin, Daniel Lindqvist
Previous findings suggest a link between neuroinflammatory processes and suicidality. Despite several lines of evidence supporting this link, including increased pro-inflammatory markers in blood-, cerebrospinal fluid (CSF)- and in post-mortem brain samples from suicidal individuals, the underlying mechanisms remain poorly understood. In this pilot study, we explored the possibility that autoimmune encephalopathies might be found among suicide attempters. We analysed the presence of six different autoantibodies (N-methyl-D-aspartate receptor, the α-amino-3-hydroxy-5-methyl-4-isoxazol-propionic acid receptor, the γ-amino-butyric acid B-receptor, the leucine-rich, glioma-inactivated 1, the contactin-associated protein-like 2, and the dipeptidyl-peptidase-like protein-6), all previously associated with psychopathology, in CSF samples from 29 unmedicated suicide attempters...
2017: PloS One
https://www.readbyqxmd.com/read/28447927/unexpected-positive-prospective-crossmatches-in-organ-transplant
#5
REVIEW
Judith Desoutter, Marie-Joelle Apithy, Nicolas Guillaume
Preformed donor-specific antibodies against human leukocyte antigen can induce antibody-mediated rejection after organ transplant. Hence, future transplant recipients undergo pretransplant screening for preformed antibodies (ie, virtual crossmatch). Subsequently, prospective (analytic) crossmatching is performed using conventional, complement-dependent cytotoxicity assays and/or flow cytometry-based methods. The present article reviews factors that must be considered when unexpected, positive, prospective crossmatches are observed...
April 27, 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28446514/autoimmune-polyendocrine-syndrome-type-1-in-an-indian-cohort-a-longitudinal-study
#6
Ghazala Zaidi, Vijayalakshmi Bhatia, Saroj Sahoo, Aditya Narayan Sarangi, Niharika Bharti, Li Zhang, Liping Yu, Daniel Eriksson, Sophie Bensing, Olle Kämpe, Nisha Bhavani, Surender K Yachha, Anil Bhansali, Alok Sachan, Vandana Jain, Nalini Shah, Rakesh Aggarwal, Amita Aggarwal, Muthuswany Srinivasan, Sarita Agarwal, Eesh Bhatia
OBJECTIVE: Autoimmune polyendocrine syndrome type 1 (APS 1) is a rare autosomal recessive disorder characterized by progressive organ-specific autoimmunity. There is scant information on APS1 in ethnic groups other than European Caucasians. We studied clinical aspects and autoimmune regulator (AIRE) gene mutations in a cohort of Indian APS1 patients. DESIGN: Twenty-three patients (19 families) from six referral centres in India, diagnosed between 1996-2016, were followed for [median (range)] 4 (0...
April 26, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28445760/determining-the-spatial-relationship-of%C3%A2-membrane-bound-aquaporin-4-autoantibodies-by-sted-nanoscopy
#7
John N Soltys, Stephanie A Meyer, Hannah Schumann, Emily A Gibson, Diego Restrepo, Jeffrey L Bennett
Determining the spatial relationship of individual proteins in dense assemblies remains a challenge for superresolution nanoscopy. The organization of aquaporin-4 (AQP4) into large plasma membrane assemblies provides an opportunity to image membrane-bound AQP4 antibodies (AQP4-IgG) and evaluate changes in their spatial distribution due to alterations in AQP4 isoform expression and AQP4-IgG epitope specificity. Using stimulated emission depletion nanoscopy, we imaged secondary antibody labeling of monoclonal AQP4-IgGs with differing epitope specificity bound to isolated tetramers (M1-AQP4) and large orthogonal arrays of AQP4 (M23-AQP4)...
April 25, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28444742/the-effect-of-rituximab-on-anti-platelet-autoantibody-levels-in-patients-with-immune-thrombocytopenia
#8
Donald M Arnold, John R Vrbensky, Nadia Karim, James W Smith, Yang Liu, Nikola Ivetic, John G Kelton, Ishac Nazy
Rituximab is an effective therapy resulting in a platelet count improvement in 60% of patients with immune thrombocytopenia (ITP). Rituximab depletes B cells; thus, a reduction in platelet autoantibody levels would be anticipated in patients who achieve a clinical response to this treatment. The objectives of this study were to determine whether rituximab was associated with a reduction in platelet autoantibody levels, and to correlate the loss of autoantibodies with the achievement of a treatment response...
April 25, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28444667/clinical-significance-of-antinuclear-and-antiextractable-nuclear-antigen-antibody-in-childhood-immune-thrombocytopenia
#9
Qihui Liu, Hongzhen Xu, Xianmin Guan, Yali Shen, Xianhao Wen, Yuxia Guo, Jie Yu, Yongchun Su
This study aims to determine the clinical significance of positive antinuclear/antiextractable nuclear antigen (ANA/A-ENA) antibody on manifestation and therapeutic response of childhood immune thrombocytopenia (ITP). Overall, 1,330 patients aged between 1 and 15.6 years diagnosed with primary ITP were retrospectively analyzed, excluding those with secondary ITP. Bleeding manifestations were recorded. All patients underwent autoantibody testing and follow-up for 32 months on average (range: 23-54 months). Steroid response was also assessed...
April 25, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/28443948/relapse-of-congenital-thrombotic-thrombocytopenic-purpura-after-spontaneous-remission-in-a-second-trimester-primigravida-case-report-and-review-of-the-literature
#10
Donavan de Souza Lúcio, Jacqueline Foelkel Pignatari, Marcelo Gil Cliquet, Henri Augusto Korkes
CONTEXT: Thrombotic microangiopathy syndrome or thrombotic thrombocytopenic purpura-hemolytic uremic syndrome (TTP-HUS) describes distinct diseases sharing common pathological features: microangiopathic hemolytic anemia and thrombocytopenia, without any other apparent cause. CASE REPORT: An 18-year-old second-trimester primigravida presented with a history of fifteen days of intense weakness, followed by diarrhea over the past six days. She reported having had low platelets since childhood, but said that she had never had bleeding or menstrual abnormalities...
April 20, 2017: São Paulo Medical Journal, Revista Paulista de Medicina
https://www.readbyqxmd.com/read/28443628/intestinal-microbiota-link-lymphopenia-to-murine-autoimmunity-via-pd-1-cxcr5-dim-b-helper-t-cell-induction
#11
Toshiki Eri, Kimito Kawahata, Takeyuki Kanzaki, Mitsuru Imamura, Kazuya Michishita, Lisa Akahira, Ei Bannai, Noritada Yoshikawa, Yasumasa Kimura, Takeshi Satoh, Satoshi Uematsu, Hirotoshi Tanaka, Kazuhiko Yamamoto
T cell lymphopenia results in peripheral homeostatic expansion to maintain the T cell immune system, which is termed lymphopenia-induced proliferation (LIP). LIP is a potential risk for expanding autoreactive clones to become pathogenic in human and murine autoimmune diseases. However, the ontogeny of T cells that induce autoantibody production by autoreactive B cells in LIP remains unclear. Transfer of CD4(+)CD25(-) conventional T (Tc) cells into T-cell-deficient athymic nude mice has been previously reported as a LIP-induced autoimmune model which develops organ-specific autoimmune diseases and systemic antinuclear antibodies (ANAs)...
April 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28442530/breach-of-autoreactive-b-cell-tolerance-by-post-translationally-modified-proteins
#12
Jacqueline S Dekkers, Marije K Verheul, Jeroen N Stoop, Bisheng Liu, Andreea Ioan-Facsinay, Peter A van Veelen, Arnoud H de Ru, George M C Janssen, Martin Hegen, Steve Rapecki, Tom W J Huizinga, Leendert A Trouw, René E M Toes
OBJECTIVES: Over 50% of patients with rheumatoid arthritis (RA) harbour a variety of anti-modified protein antibodies (AMPA) against different post-translationally modified (PTM) proteins, including anti-carbamylated protein (anti-CarP) antibodies. At present, it is unknown how AMPA are generated and how autoreactive B cell responses against PTM proteins are induced. Here we studied whether PTM foreign antigens can breach B cell tolerance towards PTM self-proteins. METHODS: Serum reactivity towards five carbamylated proteins was determined for 160 patients with RA and 40 healthy individuals...
April 25, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28441921/acquired-hemophilia-a-a-review-of-recent-data-and-new-therapeutic-options
#13
Massimo Franchini, Stefania Vaglio, Giuseppe Marano, Carlo Mengoli, Sara Gentili, Simonetta Pupella, Giancarlo Maria Liumbruno
OBJECTIVES: Acquired hemophilia A (AHA) is a rare, but potentially life-threatening, bleeding disorder caused by an autoantibody against factor VIII that interferes with its coagulant function. METHODS: We performed a narrative review focusing on the diagnostic aspects of AHA and on the current treatment strategies with particular regard to new data and therapeutic developments. RESULTS: The management of this severe hemorrhagic disorder is based on the control of bleeding with the use of bypassing agents and on the utilization of a variety of immunosuppressant agents with the goal of eliminating the autoantibody permanently...
April 25, 2017: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/28440223/structural-insights-into-the-molecular-mechanisms-of-myasthenia-gravis-and-their-therapeutic-implications
#14
Kaori Noridomi, Go Watanabe, Melissa N Hansen, Gye Won Han, Lin Chen
The nicotinic acetylcholine receptor (nAChR) is a major target of autoantibodies in myasthenia gravis (MG), an autoimmune disease that causes neuromuscular transmission dysfunction. Despite decades of research, the molecular mechanisms underlying MG have not been fully elucidated. Here, we present the crystal structure of the nAChR α1 subunit bound by the Fab fragment of mAb35, a reference monoclonal antibody that causes experimental MG and competes with ~65% of antibodies from MG patients. Our structures reveal for the first time the detailed molecular interactions between MG antibodies and a core region on nAChR α1...
April 25, 2017: ELife
https://www.readbyqxmd.com/read/28439640/the-elusive-role-of-b-lymphocytes-and-islet-autoantibodies-in-human-type-1-diabetes
#15
EDITORIAL
Stef J Bloem, Bart O Roep
The role of B lymphocytes in the pathogenesis of type 1 diabetes in humans is not entirely evident. These cells are presumed to be important, but this assumption is largely based on animal models of autoimmune diabetes, where compelling evidence for the contribution of both B lymphocytes and insulin-specific autoantibodies to this disease is in place. For humans, this is much less the case; the exact way in which B lymphocytes and/or autoantibodies may contribute to type 1 diabetes is not yet known but the possibilities include a pathogenic function ('fire'), or they may represent a surrogate of loss of immune tolerance to beta cells ('smoke') or, indeed, they could be a marker of an attempt at immune regulation ('ice water')...
April 24, 2017: Diabetologia
https://www.readbyqxmd.com/read/28439273/expansion-of-fasl-expressing-cd5-b-cells-in-type-1-diabetes-patients
#16
Ankit Saxena, Hideo Yagita, Thomas W Donner, Abdel Rahim A Hamad
Fas ligand drives insulitis in the non-obese diabetic mouse model of type 1 diabetes (T1D) and negatively regulates IL-10-producing (IL-10(pos)) CD5(+) B cells in pancreata. Relevance of these phenomena to the human disease is poorly understood. Here, using splenocytes from T1D, autoantibody (Ab(+)), and non-diabetic (ND) human subjects, we show that a subpopulation of CD5(+) B cells that is characterized by expression of FasL (FasL(hi)CD5(+)) was significantly elevated in T1D subjects, many of whom had significantly reduced frequency of IL-10(pos)CD5(+) B cells compared to Ab(+) subjects...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28439269/genome-wide-identification-of-target-genes-for-the-key-b-cell-transcription-factor-ets1
#17
Prontip Saelee, Alyssa Kearly, Stephen L Nutt, Lee Ann Garrett-Sinha
BACKGROUND: The transcription factor Ets1 is highly expressed in B lymphocytes. Loss of Ets1 leads to premature B cell differentiation into antibody-secreting cells (ASCs), secretion of autoantibodies, and development of autoimmune disease. Despite the importance of Ets1 in B cell biology, few Ets1 target genes are known in these cells. RESULTS: To obtain a more complete picture of the function of Ets1 in regulating B cell differentiation, we performed Ets1 ChIP-seq in primary mouse B cells to identify >10,000-binding sites, many of which were localized near genes that play important roles in B cell activation and differentiation...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28439062/a-rare-case-of-necrotizing-myopathy-and-fibrinous-and-organizing-pneumonia-with-anti-ej-antisynthetase-syndrome-and-ssa-antibodies
#18
Muhammad Kashif, Divya Arya, Masooma Niazi, Misbahuddin Khaja
BACKGROUND Idiopathic inflammatory myopathies are autoimmune disorders that can involve the skin, joints, muscles, and lungs. The most common of these disorders are dermatomyositis, polymyositis, overlap syndrome, and inclusion body myositis. Necrotizing autoimmune myopathy is an idiopathic inflammatory myopathy that is rarely associated with Sjögren's syndrome. The most common lung findings associated with anti-EJ antisynthetase syndrome are nonspecific interstitial pneumonia and usual interstitial pneumonia; this condition is rarely associated with fibrinous and organizing pneumonia...
April 25, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28438897/downregulation-of-mir-200a-3p-targeting-ctbp2-is-involved-in-the-hypoproduction-of-il-2-in-systemic-lupus-erythematosus-derived-t-cells
#19
Eri Katsuyama, Minglu Yan, Katsue Sunahori Watanabe, Syun Matsushima, Yuriko Yamamura, Sumie Hiramatsu, Keiji Ohashi, Haruki Watanabe, Takayuki Katsuyama, Sonia Zeggar, Nobuya Yoshida, Vaishali R Moulton, George C Tsokos, Ken-Ei Sada, Jun Wada
Systemic lupus erythematosus (SLE) damages multiple organs by producing various autoantibodies. In this study, we report that decreased microRNA (miR)-200a-3p causes IL-2 hypoproduction through zinc finger E-box binding homeobox (ZEB)1 and C-terminal binding protein 2 (CtBP2) in a lupus-prone mouse. First, we performed RNA sequencing to identify candidate microRNAs and mRNAs involved in the pathogenesis of SLE. We found that miR-200a-3p was significantly downregulated, whereas its putative targets, ZEB2 and CtBP2, were upregulated in CD4(+) T cells from MRL/lpr-Tnfrsf6(lpr) mice compared with C57BL/6J mice...
April 24, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28438465/isaacs-syndrome-with-caspr2-antibody-a-series-of-three-cases
#20
Jie Song, Sisi Jing, Chao Quan, Jun Lu, Xiangyang Qiao, Kai Qiao, Jiahong Lu, Jianying Xi, Chongbo Zhao
Isaacs syndrome is a form of peripheral nerve hyperexcitability, characterized by spontaneous muscle twitching and stiffness. Some patients are reported to be positive for CASPR2 antibody that may be one of the pathogenic autoantibodies in Isaacs syndrome. We reported a series of three patients with Isaacs syndrome, including their clinical features, electrophysiologic findings, laboratory parameters and therapeutic responses. All the three patients were positive for CASPR2 antibodies examined on transfected human embryonic kidney 293 cells by indirect immunofluorescence method...
April 21, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
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