Surface IgA and Fc-alpha receptors on human alveolar macrophages from normal subjects and from patients with sarcoidosis.

Surface IgA and Fc-alpha receptors on human alveolar macrophages from normal subjects and from patients with sarcoidosis.
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正常受试者和结节病患者的人肺泡巨噬细胞上的表面 IgA 和 Fc-α 受体。

DOI:
10.1164/ajrccm/139.3.740
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发表时间:
1989
期刊:
The American review of respiratory disease
影响因子:
--
通讯作者:
J. Vaerman
J. Vaerman
中科院分区:
--
文献类型:
--
作者:
Y. Sibille;B. Châtelain;P. Staquet;W. Merrill;D. Delacroix;J. Vaerman

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通过支气管肺泡灌洗(BAL)获得的人肺泡巨噬细胞(AM)被发现在其表面上具有嗜细胞性伊加和Fc α受体(Fc α R)。嗜细胞性伊加属于IgA1亚类,但未被占据的受体可以被IgA1或IgA2分子饱和。虽然聚合物和单体形式都可以附着,但聚合物的结合力约为聚合物的5倍。嗜细胞性伊加和Fc α R对胰蛋白酶敏感,并在AM培养18 h后消失。未经治疗的肺结节病患者AM中嗜细胞性伊加增加,但类固醇治疗患者AM中未观察到。在正常人和激素治疗的结节病患者中,BAL中伊加水平和AM中嗜细胞伊加的百分比之间存在显著相关性。然而,在未经治疗的患者中没有观察到这种关系。这些数据表明多种因素可能调节AM表面的IgA受体。肺部发生的炎症事件可以改变受体表达,并且可能在某些肺部疾病的免疫生理病理学中具有重要意义。
Human alveolar macrophages (AM) obtained by bronchoalveolar lavage (BAL) were found to bear cytophilic IgA and Fc alpha-receptors (Fc alpha R) on their surface. The cytophilic IgA belongs to the IgA1 subclass, but unoccupied receptors can be saturated with either IgA1 or IgA2 molecules. Although both polymeric and monomeric forms could attach, binding was about 5-fold greater for the polymers. Both cytophilic IgA and Fc alpha R are sensitive to trypsin and disappear after 18 h of AM culture. An increase in cytophilic IgA was observed on AM from untreated patients with pulmonary sarcoidosis, but not on AM from steroid-treated patients. A significant correlation was found between IgA levels in BAL and the percentage of AM with cytophilic IgA in normal subjects and in steroid-treated sarcoid patients. However, no such relationship was seen among untreated patients. These data suggest that multiple factors may modulate AM surface receptors for IgA. Inflammatory events occurring in the lungs could alter receptor expression and perhaps be of significance in the immunophysiopathology of certain pulmonary diseases.
免疫干扰素增强人粒细胞的功能特性:Fc 受体的作用以及淋巴毒素、肿瘤坏死因子和粒细胞-巨噬细胞集落刺激因子的作用。
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影响因子: --
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发表时间: 1983
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DOI: --
发表时间: 1985
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
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发表时间: 1981
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影响因子: --
作者:
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