转运蛋白配体 Ro5-4864 可调节 T 细胞介导的皮肤炎症反应。

IF 4.8 4区 医学 Q2 IMMUNOLOGY
Yuka Sendai, Kazuyoshi Takeda, Keisuke Ohta, Susumu Nakae, Kyotaro Koshika, Kei Kitamura, Makoto Higuchi, Tatsuya Ichinohe, Toshifumi Azuma, Ko Okumura, Tatsukuni Ohno
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引用次数: 0

摘要

转运蛋白(TSPO)是一种线粒体外膜蛋白,表达于多种免疫细胞,包括巨噬细胞、树突状细胞和 T 细胞,以及神经元和类固醇生成细胞。以往对 TSPO 配体的研究表明,TSPO 参与多种细胞功能,包括类固醇生成、免疫调节和细胞增殖。目前,有关 TSPO 或 TSPO 配体对 T 细胞介导的免疫反应的影响的报道有限。我们在此使用 2,4-二硝基-1-氟苯(DNFB)诱导的接触过敏(CH)模型研究了 TSPO/TSPO 配体参与 T 细胞反应的情况。在DNFB致敏过程中使用TSPO配体Ro5-4864可减少引流淋巴结中CD4+和CD8+T细胞的数量和活化状态,并减轻DNFB挑战后的皮肤炎症。将经过 Ro5-4864 处理的小鼠 DNFB 致敏 T 细胞收养转移到幼稚小鼠体内可抑制 DNFB 挑战后的 CH 反应。与对照组相比,Ro5-4864处理过的致敏T细胞在受到DNFB脉冲抗原递呈细胞刺激时显示出较低的增殖反应。Ro5-4864 还能抑制 T 细胞活化过程中的细胞增殖以及三磷酸腺苷和乳酸的产生。此外,Ro5-4864 对 T 细胞反应的抑制作用在 TSPO 缺陷细胞中保持不变。我们的研究结果表明,Ro5-4864 通过抑制能量代谢(至少通过糖酵解)来抑制 CH 反应,从而以独立于 TSPO 的方式降低 T 细胞的初级反应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ro5-4864, a translocator protein ligand, regulates T cell-mediated inflammatory responses in skin.

Translocator protein (TSPO) is a mitochondrial outer membrane protein expressed on a variety of immune cells, including macrophages, dendritic cells, and T cells, in addition to neurons and steroid-producing cells. Previous studies of TSPO ligands have suggested that TSPO is involved in multiple cellular functions, including steroidogenesis, immunomodulation, and cell proliferation. Currently, there are limited reports on the effects of TSPO or TSPO ligands on T cell-mediated immune responses. We here investigated the involvement of TSPO/TSPO ligand in T cell responses using a 2,4-dinitro-1-fluorobenzene (DNFB)-induced contact hypersensitivity (CH) model. Treatment with Ro5-4864, a TSPO ligand, during DNFB sensitization reduced the number and activation status of CD4+ and CD8+ T cells in draining lymph nodes and alleviated skin inflammation after DNFB challenge. Adoptive transfer of Ro5-4864-treated mouse-derived DNFB-sensitized T cells to naïve mice inhibited CH responses after DNFB challenge. Ro5-4864-treated sensitized T cells showed lower proliferative responses when stimulated with DNFB-pulsed antigen-presenting cells compared to control-treated sensitized T cells. Ro5-4864 also suppressed cell proliferation, as well as adenosine triphosphate and lactate production, during T cell activation. Moreover, the inhibitory effects of Ro5-4864 on T cell responses were conserved in TSPO-deficient cells. Our results suggest that Ro5-4864 inhibits CH responses by suppressing energy metabolism, at least via glycolysis, to reduce the T cell primary response in a TSPO-independent manner.

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来源期刊
International immunology
International immunology 医学-免疫学
CiteScore
9.30
自引率
2.30%
发文量
51
审稿时长
6-12 weeks
期刊介绍: International Immunology is an online only (from Jan 2018) journal that publishes basic research and clinical studies from all areas of immunology and includes research conducted in laboratories throughout the world.
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