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Interleukin 21 and its receptor are involved in NK cell expansion and regulation of lymphocyte function

机译:白细胞介素21及其受体参与NK细胞的扩增和淋巴细胞功能的调节

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Cytokines are important in the regulation of haematopoiesis and immune responses, and can influence lymphocyte development Here we have identified a class Ⅰ cytokine receptor that is selectively expressed in lymphoid tissues and is capable of signal transduction. The full-length receptor was expressed in BaF3 cells, which created a functional assay for ligand detection and cloning. Conditioned media from activated human CD3~+ T cells supported proliferation of the assay cell line. We constructed a complementary DNA expression library from activated human CD3~+ T cells, and identified a cytokine with a four-helix-bundle structure using functional cloning. This cytokine is most closely related to IL2 and IL15, and has been designated IL21 with the receptor designated IL21 R. In vitro assays suggest that IL21 has a role in the proliferation and maturation of natural killer (NK) cell populations from bone marrow, in the proliferation of mature B-cell populations co-stimulated with anti-CD40, and in the proliferation of T cells co-stimulated with anti-CD3.
机译:细胞因子在调节造血和免疫反应中很重要,并且可以影响淋巴细胞的发育。在这里,我们已经确定了一种在淋巴细胞组织中选择性表达并能够进行信号转导的Ⅰ类细胞因子受体。全长受体在BaF3细胞中表达,这为配体检测和克隆创造了功能性检测方法。来自活化的人CD3 + T细胞的条件培养基支持测定细胞系的增殖。我们从活化的人CD3〜+ T细胞构建了一个互补的DNA表达文库,并使用功能性克隆技术鉴定了具有四螺旋束结构的细胞因子。该细胞因子与IL2和IL15最密切相关,已被命名为IL21,其受体被命名为IL21R。体外试验表明,IL21在骨髓中自然杀伤(NK)细胞群体的增殖和成熟中具有重要作用。与抗CD40共同刺激的成熟B细胞群体的增殖,以及与抗CD3共同刺激的T细胞的增殖。

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