Reprints Available Directly from the Publisher Photocopying Permitted by License Only Tingible Body Macrophages in Regulation of Germinal Center Reactions

Reprints Available Directly from the Publisher Photocopying Permitted by License Only Tingible Body Macrophages in Regulation of Germinal Center Reactions
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直接从出版商处获得重印 经许可仅允许复印 可着色体巨噬细胞在生发中心反应的调节中

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通讯作者:
A. Szakal
A. Szakal
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作者:
John P Smitha;Gregory F Burtonb;J. Tew;A. Szakal

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易染体巨噬细胞(Tingible body macrophages,TBM)长期以来被简单地认为是凋亡淋巴细胞的清道夫,其位于与抗原保留滤泡树突状细胞(antigen retaining follicular dendritic cells,FDC)非常接近的生发中心的独特微环境中。观察到TBM内吞FDC-iccosomal(免疫复合物包被体)抗原,提示TBM可能提呈该抗原并有助于调节生发中心反应。为了测试抗原呈递,将卵清蛋白(OVA)特异性TI杂交瘤3DO-54.8用作对携带OVA的TBM的应答者,所述杂交瘤在接受OVA的有效呈递时产生IL-2。结果表明,含OVA的TBM不能诱导IL-2的产生。此外,向IL-2诱导阳性对照(B细胞)中加入TBM不仅不能增加IL-2的产生,而且TBM显著(55-90%)降低了B细胞对IL-2的诱导。我们发现,与其他非淋巴中心淋巴结巨噬细胞相比,TBM富含前列腺素,并且向培养物中加入吲哚美辛可逆转TBM的抑制作用。在添加至阳性对照培养物之前,从富集制剂中耗尽TBM也消除了对IL-2产生的抑制作用。这些数据支持的概念,TBM,在独特的微环境的生发中心,可能是专门下调生发中心的反应。
Tingible body macrophages (TBM), long thought simply as scavengers of apoptotic lymphocytes, are located in the unique microenvironment of germinal centers in close proximity to antigen-retaining follicular dendritic cells (FDC). Observations that TBM endocytose FDC-iccosomal (immune-complex coated bodies) antigen suggested that TBM might present this antigen and help regulate the germinal center reaction. To test for antigen presentation, the ovalbumin (OVA)-specific TI hybridoma, 3DO-54.8, which produces IL-2 on receiving effective presentation of OVA, were used as responders to OVA-bearing TBM. Results showed that OVA-bearing TBM failed to induce IL-2 production. Furthermore, addition of TBM to IL-2-inducing positive controls (B cells) not only failed to augment IL-2 production, but rather TBM significantly (55-90%) reduced B-cell induction of IL-2. We found that TBM were rich in prostaglandin by comparison with other nongerminal center lymph node macrophages and that addition of indomethacin to the cultures reversed the inhibitory effect of TBM. Depletion of TBM from enriched preparations, prior to addition to positive control cultures, also abrogated the inhibitory effect on IL-2 production. These data support the concept that TBM, within the unique microenvironment of germinal centers, may be specialized to downregulate the germinal center reaction.
小鼠和人类初级和次级卵泡中细胞表达 T 细胞抗原。
DOI: 10.1007/978-1-4684-9066-4_104
发表时间: 1982
影响因子: --
作者:
Rouse,RV;Weissman,IL;Ledbetter,JA;Warnke,RA
通讯作者: Warnke,RA
DOI: --
发表时间: 1988
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Schad,VC;Phipps,RP
通讯作者: Phipps,RP
一种新颖的体内滤泡树突状细胞依赖性核小体介导的机制,用于将抗原递送至抗原加工细胞。
DOI: --
发表时间: 1988
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Szakal,AK;Kosco,MH;Tew,JG
通讯作者: Tew,JG
DOI: 10.4049/jimmunol.131.5.2254
发表时间: 1983-11
影响因子: 4.4
作者:
R. Coico;B. Bhogal;G. Thorbecke
通讯作者: R. Coico;B. Bhogal;G. Thorbecke
小鼠淋巴结生发中心含有选定的 T 细胞亚群——辅助表型。
DOI: --
发表时间: 1982
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Rouse,RV;Ledbetter,JA;Weissman,IL
通讯作者: Weissman,IL