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Emi Morita, Mikio Watanabe, Naoya Inoue, Hidemi Hashimoto, Emi Haga, Yoh Hidaka, Yoshinori Iwatani
Graves' disease (GD) and Hashimoto's disease (HD) are different pathological types of autoimmune thyroid diseases (AITDs). However, the epigenetic differences between these diseases have not been elucidated. DNA methylation is one of the primary epigenetic modifications that reflect environmental influences on gene expression. In this study, we evaluated the methylation status of six CpG sites in the TNFA promoter using pyrosequencing and analyzed the data in combination with functional polymorphisms (-1031 T/C and +123 C/T) in the TNFA gene to clarify the role of gene methylation on the prognosis of AITDs...
March 11, 2018: Autoimmunity
Lara A Aqrawi, Janicke Liaaen Jensen, Gunnvor Øijordsbakken, Ann-Kristin Ruus, Ståle Nygård, Marit Holden, Roland Jonsson, Hilde Kanli Galtung, Kathrine Skarstein
A characteristic feature of primary Sjögren's syndrome (pSS) is the destruction of salivary and lacrimal glands mediated by mononuclear cell infiltration. Adipocytes can also occupy a large portion of the salivary gland (SG) tissue area, although little is known about their significance in pSS. We have previously investigated adipose tissue infiltration in SG biopsies from pSS patients and non-SS sicca controls. Our findings indicated the distinct incidence of adipose tissue replacement in pSS patients, where adipocytes were detected in interleukin (IL) 6 rich regions...
March 5, 2018: Autoimmunity
Mariane Dos Santos, Priscila Tamar Poletti, Gaia Favero, Alessandra Stacchiotti, Francesca Bonomini, Carolina Caruccio Montanari, Silvia Regina Bona, Norma Possa Marroni, Rita Rezzani, Francisco Veríssimo Veronese
INTRODUCTION: Lupus nephritis (LN) is one of the most severe complications of systemic lupus erythematosus. As murine models of LN are valuable tools to better understand its pathophysiology and to search for new effective treatments, we investigated the effects of the bioflavonoid quercetin on pristane-induced LN mice through histomorphological analyses. METHODS: Immunofluorescence and biochemical assays were used to evaluate the expression of markers of inflammation (interleukin-6, IL-6; tumour necrosis factor-α, TNF-α), oxidative stress (catalase, CAT; superoxide dismutase 1, SOD1; thiobarbituric acid reactive substances, TBARS), apoptosis (Bax), and fibrosis (transforming growth factor-β1, TGF-β1)...
February 26, 2018: Autoimmunity
Chenggui Miao, Hao Yu, Jun Chang, Guoxue Zhang, Guoliang Zhou, Chuanlei Zhao
Our previous study showed that up-regulated DNA methyltransferase-1 (DNMT1) played an important role in the hypermethylation modification of SFRP4 in adjuvant-induced arthritis (AIA) rats. This work focused on the role of disordered miR-148b-3p in RA pathology and its corresponding regulatory targets. The expression of miR-148b-3p and DNMT1, and the effect of miR-148b-3p on the DNMT1 expression were determined by real-time qPCR, western blotting and double luciferase reporter genes. The role of miR-148b-3p on the SFRP4 expression, the canonical Wnt signaling and the pathology of AIA rats was investigated using real-time qPCR, western blotting and methylation-specific PCR (MSP)...
February 23, 2018: Autoimmunity
Karolina Stożek, Artur Bossowski, Katarzyna Ziora, Anna Bossowska, Małgorzata Mrugacz, Anna Noczyńska, Mieczysław Walczak, Elżbieta Petriczko, Beata Pyrżak, Anna Kucharska, Mieczysław Szalecki, Tanja Diana, George J Kahaly
INTRODUCTION: The diagnostic value of the level of TSH receptor antibodies (TSHR-Ab) in the population of children with autoimmune thyroid diseases (AITDs) is still unknown. The aim of this cross-sectional study was to investigate the prevalence of TSHR-Ab in a paediatric cohort with AITD and healthy controls. MATERIALS AND METHODS: A total of 240 serum samples were obtained from 205 patients with AITD, type 1 diabetes (T1D), juvenile arthritis (JA), and healthy controls (C)...
January 26, 2018: Autoimmunity
Sahar Sobhy Abd Elhalem, Nawal Zakaria Haggag, Nashwa Ahmed El-Shinnawy
Interleukin-9 (IL-9) has been shown to be upregulated in rheumatoid arthritis (RA). The exact role of IL-9 has not yet been effectively studied. Mesenchymal stem cells (MSCs) have shown a promising immunomodulatory role towards repairing cartilage and restoring joint function. One of the key problems influencing the therapeutic efficacy of stem cell therapy is the poor cell survival following transplantation. This is attributed to oxidative and inflammatory stresses at the injured sites. Hesperidin (Hsd), a flavanone present in citrus fruits, has been studied as potential therapeutic agents that have anti-oxidant and anti-inflammatory activities...
January 23, 2018: Autoimmunity
Katarzyna Lewandowska, Olga Ciepiela, Agnieszka Szypowska, Jan Wyhowski, Eliza Głodkowska-Mrówka, Katarzyna Popko, Magdalena Ostafin, Beata Pyrżak, Urszula Demkow
INTRODUCTION: Autoimmune diseases, such as celiac disease (CD) and diabetes mellitus type 1, tend to co-occur within the same patient. The prevalence of CD in diabetic children is higher than in the general population, and is estimated to be 0.6-16.4%. The diagnosis of CD is based on histopathological examination and serological testing, however, these methods are still imperfect and new diagnostic algorithms should be considered. AIM: The aim of the study was to assess the diagnostic value of serological tests detecting antibodies against deamidated gliadin peptide, endomysium, tissue transglutaminase, neo-epitope tissue transglutaminase and to identify HLA-related genetic predisposition to CD in patients with type 1 diabetes mellitus (DM1)...
January 19, 2018: Autoimmunity
Aleksandra Urban, Anna Borowska, Anna Felberg, Lambertus van den Heuvel, Grzegorz Stasiłojć, Elena Volokhina, Marcin Okrój
Complement convertases are enzymatic complexes, which play a critical role in propagation and amplification of the complement cascade. Under physiological conditions, convertases decay shortly after being formed in either spontaneous or inhibitor-driven process. Prolongation of their half-life by C3NeF autoantibodies that prevent convertase dissociation results in pathogenic condition often manifested by renal diseases. However, the diagnosis of convertase abnormalities is difficult due to the labile nature of these enzymes and low credibility of existing methods...
January 8, 2018: Autoimmunity
Feifei Huo, Dongbei Li, Bo Zhao, Yadong Luo, Bingjie Zhao, Xueyang Zou, Yi Li, Wei Yang
As a transcription factor, autoimmune regulator (Aire) participates in thymic negative selection and maintains immune tolerance mainly by regulating the ectopic expression of tissue-restricted antigens (TRAs) in medullary thymic epithelial cells (mTECs). Aire is also expressed in dendritic cells (DCs). DCs are professional antigen-presenting cells (APCs) that affect the differentiation of T cells toward distinct subpopulations and participate in the immune response and tolerance, thereby playing an important role in maintaining homeostasis...
January 3, 2018: Autoimmunity
Christine McDonald, Min Shen, Erin E Johnson, Amrita Kabi, Qingping Yao
Yao syndrome (YAOS) is a systemic autoinflammatory disease (SAID), formerly termed nucleotide-binding oligomerization domain-2 (NOD2)-associated autoinflammatory disease. Due to the recent identification of YAOS, the molecular mechanisms underlying its disease pathogenesis are unclear. With specific NOD2 variants as characteristic genotypic features of YAOS, our study examined NOD2 expression, transcript splicing, signaling pathway activation, and cytokine profiles in peripheral blood mononuclear cells (PBMCs) from 10 YAOS patients and six healthy individuals...
March 2018: Autoimmunity
Marie Lecouffe-Desprets, Caroline Hémont, Antoine Néel, Claire Toquet, Agathe Masseau, Mohamed Hamidou, Regis Josien, Jérôme C Martin
In this study, we aimed at evaluating the contribution of an extended myositis-related antibodies (Abs) determination by immunoblot to the diagnosis, classification, and prognosis of idiopathic inflammatory myositis (IIM). Medical records of all the patients (n = 237) with myositis-related Ab requests addressed to our department over a one-year period were retrospectively analyzed. Patients were classified as IIM, auto-immune disease (AID) other than IIM, and other diagnosis, and examined for their Ab profiles as determined by immunoblot...
March 2018: Autoimmunity
Rafaela Silva Guimarães Gonçalves, Michelly C Pereira, Andréa Tavares Dantas, Anderson Rodrigues de Almeida, Claudia Diniz Lopes Marques, Moacyr J B M Rego, Ivan R Pitta, Angela Luzia Branco Pinto Duarte, Maira Galdino R Pitta
Systemic sclerosis (SSc) is a multisystemic, complex, and rare disease of connective tissue, with high morbidity and mortality, and without specific treatment. The disease is characterized by three main principles: vascular disease, autoantibody production and inflammation, and fibrosis. Since it is well defined that SSc is characterized by elevated production of TGF-β, IL-6, and IL-1, all of them cytokines related to Th17 differentiation, the hypothesis is that this disease may be strongly related to a polarization of the immune response towards the Th17 pathway...
December 19, 2017: Autoimmunity
Ena Tokiyoshi, Mikio Watanabe, Naoya Inoue, Yoh Hidaka, Yoshinori Iwatani
The microRNA (miRNA) biogenesis pathway is regulated by specific proteins and enzymes, including Dicer, Drosha, DGCR8, Exportin 5 and the Argonaute (AGO) family. In this study, we investigated the AGO family, which is the primary component of RISC (RNA-induced silencing complex) and directly binds to microRNA. We examined the association of polymorphisms in AGO family genes with AGO expression and with the development and prognosis of autoimmune thyroid diseases. We genotyped AGO1 rs636832A/G, AGO2 rs7005286C/T, AGO2 rs11166985A/G and AGO2 rs2292779C/G polymorphisms in 184 Graves' disease (GD) patients, 195 Hashimoto's disease (HD) patients and 122 healthy volunteers using the polymerase chain reaction-restriction fragment length polymorphism method...
December 19, 2017: Autoimmunity
Jing Wang, Ping Cao, Yuan-Yuan Qi, Xue-Ping Chen, Li Ma, Rong-Rong Deng, Li-Li Zhang, Yu Zhao
OBJECTIVE: This study aims to evaluate the role of FEN1 E160D mutation in lupus nephritis (LN) patients with cell apoptosis dysfunction. METHODS: (1) Cell apoptosis was detected from 50 paraffin samples obtained from renal biopsies of patients with Class IV LN by TUNEL method and the relationship of the systemic lupus erythematosus disease activity index 2000 (SLEDAI 2000) and renal tissue cell apoptotic index (AI) was discussed. (2) FEN1 gene 61563142-61563342 containing E160D were analysed by extracting genomic DNA from peripheral blood collected from the above 50 LN patients and 25 patients with nephrectomy caused by renal trauma...
December 2017: Autoimmunity
S Ramírez-Pérez, U De la Cruz-Mosso, J Hernández-Bello, G E Martínez-Bonilla, M G Ramírez-Dueñas, A L Pereira-Suárez, I Parra Rojas, E Martínez-López, J Macías-Barragán, J F Muñoz-Valle
Rheumatoid arthritis (RA) is an autoimmune disease characterized by inflammation and pro-inflammatory cytokines production. IL-1Ra is an anti-inflammatory cytokine codified by IL1RN gene that blocks IL-1 signalling. A VNTR polymorphism of 86 bp in IL1RN gene has been associated with RA risk and regulation of IL-1Ra expression. In this study, we determined mRNA and protein expression of IL-1Ra in RA patients and control subjects (CS). This study included 85 RA patients classified according to the ACR/EULAR 2010 criteria and 67 CS...
December 2017: Autoimmunity
Urszula Skalska, Ewa Kuca-Warnawin, Anna Kornatka, Iwona Janicka, Urszula Musiałowicz, Tomasz Burakowski, Ewa Kontny
Adipose-derived mesenchymal stem cells (ASCs) have immunoregulatory properties, but their activity is dependent on signals provided by the local microenvironment. It is likely that highly inflammatory milieu of rheumatoid joint affects ASCs activity. To test this hypothesis, the function of rheumatoid ASCs derived from articular adipose tissue (AT-ASCs) and ASCs derived from subcutaneous adipose tissue (Sc-ASCs) has been analysed. Articular adipose tissue (infrapatellar fat pad) and subcutaneous adipose tissue (from the site of skin closure with sutures) were obtained from rheumatoid arthritis (RA) patients undergoing total knee joint replacement surgery...
December 2017: Autoimmunity
Yasuhiro Shimojima, Masayuki Matsuda, Wataru Ishii, Dai Kishida, Yoshiki Sekijima
The characteristics of T cell expression in peripheral blood have been previously described in dermatomyositis (DM) and polymyositis (PM); however, their intracellular signaling profiles remain unknown. The purpose of this study was to investigate the T-cell receptor (TCR)-mediated intracellular signaling in peripheral blood T cells in DM and PM. Peripheral blood T cells from 86 patients with DM (n = 57) and PM (n = 29) were used for experimental investigations. T-cell subtypes and TCR-induced phosphorylated zeta-chain-associated protein kinase 70 (pZAP70) were analyzed by flow cytometry...
December 2017: Autoimmunity
Zhihui Zhang, Yunpeng Shi, Kunmeng Yang, Rebecca Crew, Haifeng Wang, Yanfang Jiang
BACKGROUND: T follicular helper (TFH) cells and B cells are known to regulate humoral immune responses. This study is aimed at examining the putative contribution of different subsets of circulating of TFH cells and B cells to membranous nephropathy (MN). METHODS: A total of 45 MN patients and 19 healthy controls (HCs) were examined for the number of TFH cells and B cells by flow cytometry. The level of 24-h urinary protein and eGFR were calculated, and the level of serum cytokines was examined...
December 2017: Autoimmunity
Dante J Marciani
A promising treatment for T-cell-mediated autoimmune diseases is the induction of immune tolerance by modulating the immune response against self-antigens, an objective that may be achieved by vaccination. There are two main types of vaccines currently under development. The tolerogenic vaccines, composed of proteins formed by a cytokine fused to a self-antigen, which usually induce tolerance by eliminating the T-cells that are immune reactive against the self-antigen. The immunogenic vaccines, comprised of a self-antigen plus a sole Th2 adjuvant either free or conjugated, that alleviate autoimmunity by switching the immune response against the self-antigen, from a damaging pro-inflammatory Th1/Th17 to an anti-inflammatory Th2 immunity...
November 2017: Autoimmunity
Christos Liaskos, Emmanouela Marou, Theodora Simopoulou, Maria Barmakoudi, Georgios Efthymiou, Thomas Scheper, Wolfgang Meyer, Dimitrios P Bogdanos, Lazaros I Sakkas
BACKGROUND: Autoantibodies (autoAbs) help in diagnosis and predicting clinical phenotypes in systemic sclerosis (SSc). AIM OF THE STUDY: To determine the clinical utility of 13 SSc-related autoAbs in SSc patients. MATERIAL AND METHODS: A total of 131 consecutive patients with SSc (111 female, mean age 58.1 ± 14 years; 49 with diffused cutaneous SSc [dcSSc] and 82 with limited cutaneous SSc [lcSSc]) were analysed by a multiplex line immunoassay (Euroimmun) for autoantibodies (autoAbs) against 13 SSc-related antigens...
November 2017: Autoimmunity
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