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

AbstractPurposeThe 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.MethodsSplenic CD4 T cells of NZB mice were isolated and stimulated by co-culture of T cells with individual band 3 peptides. IL-10 production was measured by enzyme-linked immunosorbent assay and proliferative response of CD4 T cells was estimated by incorporation of [3H] thymidine assay. NZB mice were given either PBS, or peptides 25 (241 –251) and 29 (282–296) or both peptides intranasally on three occasions at 2-day intervals. The mice were bled at 6, 10 and 18 weeks after peptide inhalation, and the number of RBC auto-antibodies was measured by DELAT and hematocrit values were assessed.ResultsPeptides 25 (241 –251) and 29 (282–296) induced the highest IL-10 production by CD4 T cells. These peptides also inhibited the peak T cell prol...
Source: Autoimmunity Highlights - Category: Allergy & Immunology Source Type: research

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Authors: Fousekis FS, Mitselos IV, Christodoulou DK Abstract Hepatitis E virus (HEV) is a significant health problem with approximately 20 million individuals infected annually. HEV infection has been associated with a wide spectrum of extrahepatic manifestations, including neurological, hematological and renal disorders. Guillain-Barré syndrome and neuralgic amyotrophy are the most frequent neurological manifestations. In addition, HEV infection has been observed with other neurological diseases, such as encephalitis, myelitis and Bell's palsy. Hematologic manifestations include anemia due to glucose-6-phos...
Source: Clinical and molecular hepatology - Category: Gastroenterology Tags: Clin Mol Hepatol Source Type: research
Thymic tumors are rare diseases with an incidence of 0.15 cases per 100,000 person-years. They can be associated with a variety of other syndromes, such as Myasthenia Gravis or autoimmune disorders. Among them, pure red cell aplasia is a hemato-pathological condition characterized by anemia, reticulocytopenia and erythroid cell hypoplasia of bone marrow. Here, we reported a case of a 62-year-old female with a long history of neurologic symptoms due to Myasthenia Gravis. She was diagnosed with thymoma, with mediastinal mass and pleural thickening.
Source: Transfusion and Apheresis Science - Category: Hematology Authors: Source Type: research
CONCLUSIONS: We observed that AIHA and thrombocytopaenia were associated with severe lupus, affecting major organs and causing end organ damage. Thus, they may be considered as prognostic markers. Furthermore, AIHA and especially thrombocytopaenia may also be a marker for a subgroup of lupus patients who have or may develop APS. PMID: 31558101 [PubMed - as supplied by publisher]
Source: Lupus - Category: Rheumatology Authors: Tags: Lupus Source Type: research
Bone Marrow Transplantation, Published online: 25 September 2019; doi:10.1038/s41409-019-0680-4Autoimmune cytopenias (AIC) following allogeneic haematopoietic stem cell transplant for acquired aplastic anaemia: a joint study of the Autoimmune Diseases and Severe Aplastic Anaemia Working Parties (ADWP/SAAWP) of the European Society for Blood and Marrow Transplantation (EBMT)
Source: Bone Marrow Transplantation - Category: Hematology Authors: Source Type: research
Autoimmune hemolytic anemia (AIHA) occurs more frequently than other autoimmune hematological diseases (AHDs) after allogeneic hematopoietic stem cell transplantation. Haploidentical donors and chronic graft vs host disease are risk factors for AIHA and corticosteroids combined with cyclosporine A are superior to corticosteroids as initial treatment for AIHA. AIHA does not contribute to increase treatment ‐related mortality and could reduce the malignant diseases relapse and increase disease‐free survival. AbstractTo investigate the incidence and risk factors as well as prognosis of autoimmune hemolytic anemia (AIHA) f...
Source: Cancer Medicine - Category: Cancer & Oncology Authors: Tags: ORIGINAL RESEARCH Source Type: research
DISCUSSION: We found high rates of response to steroids, with very prolonged treatments that cause side effects and corticoid dependence in a third of patients. The combination of steroids with rituximab in the first line, could be indicated in patients with low levels of haemoglobin and serological type IgG+C. The high relapse rates make necessary the development of randomised studies with new drugs or the combination with existing ones, which allow longer response times and with fewer side effects. PMID: 31488259 [PubMed - as supplied by publisher]
Source: Medicina Clinica - Category: General Medicine Tags: Med Clin (Barc) Source Type: research
Conclusions: Rituximab is both safe and effective for the treatment of acquired angioedema with C1-inhibitor deficiency, ANCA-associated vasculitis, autoimmune hemolytic anemia, Behçet’s disease, bullous pemphigoid, Castleman’s disease, cryoglobulinemia, Goodpasture’s disease, IgG4-related disease, immune thrombocytopenia, juvenile idiopathic arthritis, membraneous nephropathy, relapsing-remitting multiple sclerosis, myasthenia gravis, nephrotic syndrome, neuromyelitis optica, pemphigus, rheumatoid arthritis, spondyloarthropathy, and systemic sclerosis. Conversely, rituximab failed to show an effec...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
In this study, we present the case of a 45-year-old patient, male, who was diagnosed with ES associated with active SLE. The patient was admitted to the emergency room presenting severe hemolytic anemia and onset of thrombocytopenia. He was treated with intravenous corticosteroid therapy, followed by azathioprine.RESUMEN El s índrome de Evans (SE) es una enfermedad autoinmune rara de etiología desconocida; ocurre cuando hay combinación de anemia hemolítica autoinmune (AHAI) con trombocitopenia, acompañada o no de neutropenia inmune. Ese síndrome es un tipo variable especial de AHAI...
Source: Jornal Brasileiro de Patologia e Medicina Laboratorial - Category: Pathology Source Type: research
CONCLUSION: Low-dose rituximab has good efficacy and safety in the treatment of hematologic abnormalities in patients with connective tissue disease.
. PMID: 31426902 [PubMed - as supplied by publisher]
Source: International Journal of Clinical Pharmacology and Therapeutics - Category: Drugs & Pharmacology Tags: Int J Clin Pharmacol Ther Source Type: research
Autoimmune cytopenias (AIC) such as immune thrombocytopenia or autoimmune hemolytic anemia are claimed to be essentially driven by a dysregulated immune system. Using next-generation immunosequencing we profiled 59 T and B cell repertoires (TRB and IGH) of 25 newly diagnosed patients with primary or secondary (lymphoma-associated) AIC to test the hypothesis if these patients present a disease-specific immunological signature that could reveal pathophysiological clues and eventually be exploited as blood-based biomarker. Global TRB and IGH repertoire metrics as well as VJ gene usage distribution showed uniform characteris...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
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