Search results for "Autoimmune"
showing 10 items of 648 documents
The chemiluminescence activity of peripheral blood mononuclear cells during acute experimental allergic encephalomyelitis
1987
The spontaneous chemiluminescence activity (CL-A) of peripheral mononuclear cells (MNC) was examined in Lewis rats with acute experimental allergic encephalomyelitis (EAE), compared to rats immunized with complete adjuvant (n = 11) and healthy animals (n = 16). In rats with EAE, CL-A increased sharply 8-9 days after immunization (3420 +/- 3124 counts/10 s, n = 16) at the time of flattening of the weight curve. This CL-A peak was compared to that of animals immunized with complete adjuvant: 765 +/- 441 counts/10 s (P = 0.01) and healthy rats: 450 +/- 172 counts/10 s (P = 0.0001). After this initial peak in EAE rats, CL-A decreased almost to normal values when animals lost weight (746 +/- 251…
Minimal manifestation status and prednisone withdrawal in the MGTX trial
2020
ObjectiveTo examine whether sustained minimal manifestation status (MMS) with complete withdrawal of prednisone is better achieved in thymectomized patients with myasthenia gravis (MG).MethodsThis study is a post hoc analysis of data from a randomized trial of thymectomy in MG (Thymectomy Trial in Non-Thymomatous Myasthenia Gravis Patients Receiving Prednisone Therapy [MGTX]). MGTX was a multicenter, randomized, rater-blinded 3-year trial that was followed by a voluntary 2-year extension for patients with acetylcholine receptor (AChR) antibody–positive MG without thymoma. Patients were randomized 1:1 to thymectomy plus prednisone vs prednisone alone. Participants were age 18–65 years at enr…
Targeting transcription factor Stat4 uncovers a role for interleukin-18 in the pathogenesis of severe lupus nephritis in mice
2011
Polymorphisms in the transcription factor Stat4 gene have been implicated as risk factors for systemic lupus erythematosus. Although some polymorphisms have a strong association with autoantibodies and nephritis, their impact on pathophysiology is still unknown. To explore this further we used signal transducers and activators of transcription 4 (Stat4) knockout MRL/MpJ-Fas(lpr)/Fas(lpr) (MRL-Fas(lpr)) mice and found that they did not differ in survival or renal function from Stat4-intact MRL-Fas(lpr) mice. Circulating interleukin (IL)-18 levels, however, were elevated in Stat4-deficient compared to Stat4-intact mice, suggesting that this interleukin might contribute to the progression of l…
Expression of the multidrug resistance glycoprotein 170 in the peripheral blood lymphocytes of rheumatoid arthritis patients. The percentage of lymph…
1996
International audience; Abstract: The objective was to evaluate the expression of the multidrug resistance P-glycoprotein (P-gp) in peripheral blood lymphocytes (PBL) of patients with rheumatoid arthritis (RA). PBL from 68 RA patients and 44 controls were evaluated. RA patients had a mean disease duration of 10.7 yr, with a mean number of past resistances to DMARDs of 0.82, and were treated with NSAIDs (n = 34), DMARDs (n = 25) and prednisolone (n = 40). Fluorescence flow cytometry was used to assess P-gp membrane expression on PBL. In the RA group, the percentage of PBL expressing P-gp was higher in patients treated with prednisolone than in other patients [mean +/- S.D.: 10.7 +/- 15.8% vs…
Incidence and Clinical Implications of Autoimmune Thyroiditis in the Development of Acne in Young Patients
2021
Autoimmune thyroiditis (AIT) is on the rise among the population, and is frequently associated with patients with acne vulgaris, especially females aged between 18–55 years old. The connection between the two is not fully elucidated. In this study, 236 patients diagnosed with acne in the dermatological office of the private Pelican Hospital and in few private dermatological offices from Oradea, Romania, during January 2018–December 2020, aged between 12 and 55 years old, were endocrinologically investigated to determine AIT and its influence on the severity of the acne. The values for the thyroid antibodies and thyroid-stimulating hormone (TSH) were determined for all of the subjects. The f…
COVID-19 Vaccine and Death: Causality Algorithm According to the WHO Eligibility Diagnosis
2021
The current challenge worldwide is the administration of anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccines. Even if rarely, severe vascular adverse reactions temporally related to vaccine administration have induced diffidence in the population at large. In particular, researchers worldwide are focusing on the so-called “thrombosis and thrombocytopenia after COVID-19 vaccination”. This study aims to establish a practical workflow to define the relationship between adverse events following immunization (AEFI) and COVID-19 vaccination, following the basic framework of the World Health Organization (WHO). Post-mortem investigation plays a pivotal role to support this c…
Ruolo delle heat shock proteins nella patogenesi della miastenia gravis
2010
Myasthenia Gravis (MG) is an autoimmune disorder of the neuromuscolar junction mediated by specific antibodies to the nicotinic acetylcholine receptors. Several clinical and experimental studies have confirmed that the HSPs are involved in the process of regulation of some autoimmune disorders such as arthritis, diabetes, atherosclerosis and multiple sclerosis. The involvement of HSPs within different autoimmune disorders allows to hypothesize their presence in the pathogenesis of the MG, i.e. as suggested by the existence of a cross-reactivity among the antigenic epitopes of Hsp60 and AChR. Moreover, since a cross-reactivity between human and bacterial epitopes of Hsp60 has also been descr…
The Role of Exosomes Derived From Mesenchymal Stromal Cells in Dermatology
2021
This study has been funded by the Carlos III Health Institute of Spain through the PI13/02576 and PI17/02083 projects [cofunded by European Regional Development Fund "A way to make Europe" and Andalusian Regional Government Finance (SAS PI-0458-2016)]. The work of MQ-V was supported by a predoctoral fellowship (BOE 22/10/2019) from the Spanish Ministry of Science, Innovation and Universities. This study is part of her doctoral research in the Biomedicine program at the University of Granada.
T-bet as a possible therapeutic target in autoimmune disease
2002
The prominent role of pro-inflammatory cytokines produced by T helper-1 (T(H1)) cells in regulating autoimmune responses in vitro and in vivo has been demonstrated. Recent observations of T cell polarisation by regulatory transcription factors--especially T-bet (T-box expressed in T cells)--raise the question of their influence in controlling autoimmune diseases. Here, the authors summarise recent observations of the role of T-bet in controlling chronic inflammatory and autoimmune diseases and discuss the implications of these findings for future therapeutic approaches.
Correlation of renal tubular epithelial cell-derived interleukin-18 up-regulation with disease activity in MRL-Faslpr mice with autoimmune lupus neph…
2002
Objective MRL-Faslpr mice spontaneously develop an autoimmune disease that mimics systemic lupus erythematosus in humans. Infiltrating T cells expressing interferon-γ (IFNγ) are responsible for the autoimmune kidney destruction in MRL-Faslpr mice, and interleukin-18 (IL-18) released by mononuclear phagocytes stimulates T cells to produce the IFNγ. Since MRL-Faslpr T cells are characterized by an overexpression of the IL-18 receptor accessory chain, we sought to determine the impact of IL-18 on the progression of lupus nephritis in MRL-Faslpr mice. Methods IL-18 expression in sera and kidney tissues from MRL-Faslpr mice was determined by enzyme-linked immunosorbent assay (ELISA), reverse tra…