首页> 外文期刊>Clinical immunology: The official journal of the Clinical Immunology Society >In vitro expanded human CD4+CD25+ regulatory T cells suppress effector T cell proliferation.
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In vitro expanded human CD4+CD25+ regulatory T cells suppress effector T cell proliferation.

机译:体外扩增的人CD4 + CD25 +调节性T细胞抑制效应T细胞增殖。

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Regulatory T cells (Tregs) have been shown to be critical in the balance between autoimmunity and tolerance and have been implicated in several human autoimmune diseases. However, the small number of Tregs in peripheral blood limits their therapeutic potential. Therefore, we developed a protocol that would allow for the expansion of Tregs while retaining their suppressive activity. We isolated CD4+CD25 hi cells from human peripheral blood and expanded them in vitro in the presence of anti-CD3 and anti-CD28 magnetic Xcytetrade markDynabeads(R) and high concentrations of exogenous Interleukin (IL)-2. Tregs were effectively expanded up to 200-fold while maintaining surface expression of CD25 and other markers of Tregs: CD62L, HLA-DR, CCR6, and FOXP3. The expanded Tregs suppressed proliferation and cytokine secretion of responder PBMCs in co-cultures stimulated with anti-CD3 or alloantigen. Treg expansion is a critical first step before consideration of Tregs as a therapeutic intervention in patients with autoimmune or graft-versus-host disease.
机译:调节性T细胞(Tregs)已被证明在自身免疫和耐受性之间的平衡中至关重要,并与多种人类自身免疫性疾病有关。然而,外周血中少量的Treg限制了其治疗潜力。因此,我们开发了一种协议,该协议将允许Tregs扩展同时保留其抑制活性。我们从人外周血中分离了CD4 + CD25 hi细胞,并在存在抗CD3和抗CD28磁性Xcytetrade markDynabeads(R)和高浓度外源性白介素(IL)-2的情况下在体外扩增了它们。 Tregs有效扩增至200倍,同时保持CD25和其他Tregs标志物的表面表达:CD62L,HLA-DR,CCR6和FOXP3。在抗CD3或同种抗原刺激的共培养物中,扩增的Treg抑制了应答性PBMC的增殖和细胞因子分泌。在考虑将Tregs作为自身免疫或移植物抗宿主病患者的治疗手段之前,Treg的扩增是关键的第一步。

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