Saito Takahito, Yano Michihiro, Ohki Yutaro, Tomura Michio, Nakano Naoko
Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba 278-0022, Japan; and.
Department of Pharmaceutical Sciences, Osaka Ohtani University, Osaka 584-8541, Japan.
J Immunol. 2017 Jul 1;199(1):62-71. doi: 10.4049/jimmunol.1600848. Epub 2017 May 31.
Epidermal γδ T cells that reside in the front line of the skin play a pivotal role in stress immune surveillance. However, it is not clear whether these cells are involved in further induction of immune responses after they are activated in dysregulated epidermis. In this study, we found that activated γδ T cells expressed occludin and migrated into draining lymph nodes in an occludin-dependent manner. Epidermal γδ T cells in occludin-deficient mice exhibited impairments in morphology changes and motility, although they expressed activation markers at levels comparable to those in wild-type cells. Occludin deficiency weakened the induction of allergen-induced contact hypersensitivity, primarily as the result of the impaired migration of epidermal γδ T cells. Thus, occludin expression by epidermal γδ T cells upon activation in response to epidermal stress allows them to move, which could be important for augmentation of immune responses via collaboration with other cells.
驻留在皮肤前线的表皮γδ T细胞在应激免疫监视中起关键作用。然而,尚不清楚这些细胞在失调的表皮中被激活后是否参与免疫反应的进一步诱导。在本研究中,我们发现活化的γδ T细胞表达闭合蛋白,并以闭合蛋白依赖的方式迁移至引流淋巴结。闭合蛋白缺陷小鼠的表皮γδ T细胞在形态变化和运动能力方面表现出缺陷,尽管它们表达的活化标志物水平与野生型细胞相当。闭合蛋白缺陷削弱了变应原诱导的接触性超敏反应的诱导,主要是由于表皮γδ T细胞迁移受损所致。因此,表皮γδ T细胞在响应表皮应激而被激活时表达闭合蛋白,使其能够移动,这对于通过与其他细胞协作增强免疫反应可能很重要。
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