Počet záznamů: 1  

Antigen Loading (e.g., Glutamic Acid Decarboxylase 65) of Tolerogenic DCs (toIDCs) Reduces Their Capacity to Prevent Diabetes in the Non-Obese Diabetes (NOD)-Severe Combined Immunodeficiency Model of Adoptive Cotransfer of Diabetes As Well As in NOD Mice

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    0489545 - MBU-M 2019 RIV CH eng J - Článek v odborném periodiku
    Funda, David P. - Goliáš, Jaroslav - Hudcovic, Tomáš - Kozáková, Hana - Špíšek, R. - Palová-Jelínková, L.
    Antigen Loading (e.g., Glutamic Acid Decarboxylase 65) of Tolerogenic DCs (toIDCs) Reduces Their Capacity to Prevent Diabetes in the Non-Obese Diabetes (NOD)-Severe Combined Immunodeficiency Model of Adoptive Cotransfer of Diabetes As Well As in NOD Mice.
    Frontiers in Immunology. Roč. 9, FEB 16 (2018), č. článku 290. ISSN 1664-3224
    Grant CEP: GA ČR GA15-24487S
    Institucionální podpora: RVO:61388971
    Klíčová slova: type 1 diabetes * cell therapy * autoantigen
    Kód oboru RIV: EE - Mikrobiologie, virologie
    Obor OECD: Microbiology
    Impakt faktor: 4.716, rok: 2018

    Tolerogenic DCs (tolDCs) are being researched as a promising intervention strategy also in autoimmune diseases including type 1 diabetes (T1D). T1D is a T-cell-mediated, organ-specific disease with several well-defined and rather specific autoantigens, i.e., proinsulin, insulin, glutamic acid decarboxylase 65 (GAD65), that have been used in animal as well as human intervention trials in attempts to achieve a more efficient, specific immunotherapy. In this study, we have tested tolerogenic DCs for their effectiveness to prevent adoptive transfer of diabetes by diabetogenic splenocytes into non-obese diabetes (NOD)-severe combined immunodeficiency (NOD-SCID) recipients. While i.p. application of tolDCs prepared from bone marrow of prediabetic NOD mice by vitamin D2 and dexamethasone significantly reduced diabetes transfer into the NOD-SCID females, this effect was completely abolished when tolDCs were loaded with the mouse recombinant GAD65, but also with a control protein-ovalbumin (OVA). The effect was not dependent on the presence of serum in the tolDC culture. Similar results were observed in NOD mice. Removal of possible bystander antigen-presenting cells within the diabetogenic splenocytes by negative magnetic sorting of T cells did not alter this surprising effect. Tolerogenic DCs loaded with an immunodominant mouse GAD65 peptide also displayed diminished diabetes-preventive effect. Tolerogenic DCs were characterized by surface maturation markers (CD40, CD80, CD86, MHC II) and the lipopolysaccharide stability test. Data from alloreactive T cell proliferation and cytokine induction assays (IFN-gamma) did not reveal the differences observed in the diabetes incidence. Migration of tolDCs, tolDCs-GAD65 and tolDCs-OVA to spleen, mesenteric-and pancreatic lymph nodes displayed similar, mucosal pattern with highest accumulation in pancreatic lymph nodes present up to 9 days after the i.p. application.
    Trvalý link: http://hdl.handle.net/11104/0283938