Direct stimulation of ADCC by cloned gamma interferon is not ablated by glucocorticoids: studies using a human monocyte-like cell line (U-937).

Direct stimulation of ADCC by cloned gamma interferon is not ablated by glucocorticoids: studies using a human monocyte-like cell line (U-937).
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克隆γ干扰素对 ADCC 的直接刺激不会被糖皮质激素消除:使用人单核细胞样细胞系 (U-937) 进行的研究。

DOI:
10.1016/0161-5890(84)90132-9
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发表时间:
1984
影响因子:
3.6
通讯作者:
Fanger,MW
Fanger,MW
中科院分区:
医学3区
文献类型:
--
作者:
Shen,L;Guyre,PM;Fanger,MW

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我们已经使用巨噬细胞样细胞系U-937证明了重组免疫干扰素(γ-干扰素)在没有其他细胞类型的情况下直接作用于单核巨噬细胞,从而增加Fc受体位点和抗体依赖的细胞毒性。U-937与2%富含γ-干扰素的培养上清或10U/ml的纯重组γ-干扰素孵育18小时后,Fc受体的结合比放射标记或荧光标记的免疫球蛋白和细胞荧光法增加7倍。同时测量鸡红细胞的ADCC显示增加了7倍。这种Fc受体和功能的增强不会被糖皮质激素地塞米松的免疫抑制浓度所阻断。γ-干扰素对巨噬细胞表面受体和效应器功能的影响表明,它是免疫传出肢体的重要介体。此外,我们的研究发现,生理水平的糖皮质激素不会阻止单核巨噬细胞的激活,这支持了我们的观点,即糖皮质激素对γ-干扰素产生细胞的作用是免疫抑制的结果。这似乎是开发避免类固醇诱导的免疫抑制的潜在策略时的一个重要考虑因素。
We have used the macrophage-like cell line U-937 to demonstrate that recombinant gamma (immune) interferon (γ-IFN) acts directly on the mononuclear phagocyte in the absence of other cell types to increase Fc receptor sites and antibody-dependent cellular cytotoxicity (ADCC). Incubation of U-937 for 18hr with 2% γ-IFN-rich supernatant, or with 10 U/ml of pure recombinant γ-IFN, resulted in a seven-fold increase in Fc receptors as measured by the binding of radiolabeled IgG or fluoresceinated IgG and cytofluorography. Simultaneous measurement of ADCC for chick erythrocytes showed a seven-fold increase. This augmentation of Fc receptors and function was not ablated by an immunosuppressive concn of the glucocorticoid dexamethasone. The potent effects of γ-IFN both on surface receptors and effector functions of macrophages suggest that it is an important mediator in the efferent limb of immunity. Moreover, our findings that physiologic levels of glucocorticoids do not block activation of the mononuclear phagocyte support our view that glucocorticoids are immunosuppressive as a result of their action on γ-IFN-producing cells. This would seem an important consideration in the development of potential strategies for obviating steroid-induced immunosuppression.
人类早幼粒细胞白血病细胞系的 Fc 受体:通过葡萄球菌蛋白 A-IgG1 复合物的结合定义的两种类型受体的证据。
DOI: --
发表时间: 1980
影响因子: 4.4
作者:
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通讯作者: G. Crabtree
DOI: 10.1084/jem.147.2.593
发表时间: 1978-02-01
影响因子: 15.3
作者:
Hamburg, S I;Manejias, R E;Rabinovitch, M
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糖皮质激素诱导的 T 细胞生长因子产生抑制
DOI: 10.4049/jimmunol.123.4.1632
发表时间: 1979
期刊: The Journal of Immunology
影响因子: --
作者:
S. Gillis;G. Crabtree;Kendall A. Smith
通讯作者: Kendall A. Smith
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DOI: 10.1073/pnas.78.1.519
发表时间: 1981
影响因子: 11.1
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DOI: 10.1038/295150a0
发表时间: 1982-01-01
期刊: NATURE
影响因子: 64.8
作者:
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通讯作者: ASKONAS, BA