Selenoprotein K Is Essential for the Migration and Phagocytosis of Immature Dendritic Cells.

Selenoprotein K Is Essential for the Migration and Phagocytosis of Immature Dendritic Cells.
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硒蛋白 K 对于未成熟树突状细胞的迁移和吞噬作用至关重要

DOI:
10.3390/antiox11071264
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发表时间:
2022-06-27
期刊:
Antioxidants (Basel, Switzerland)
影响因子:
--
通讯作者:
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其他
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硒蛋白 K (SELENOK) 是一种内质网应激 (ERS) 调节蛋白,是钙 (Ca2+) 流介导的 T 细胞和中性粒细胞迁移以及巨噬细胞和小胶质细胞迁移和吞噬作用所必需的。然而,SELENOK对树突状细胞(DCs)(包括未成熟DCs(imDCs)和成熟DCs(mDCs))免疫功能的调节作用仍不清楚。本研究利用SELENOK敲除小鼠制备的imDC来评估SELENOK对imDC迁移和吞噬作用的影响。结果表明,ERS诱导的imDCs表型标记下调导致Ras同源基因家族成员A (RhoA)依赖性迁移减少,并增强Ca2+/CD205介导的吞噬作用。 SELENOK 缺乏诱导的硒蛋白 S (SELENOS) 上调减弱了 imDC 中的 ERS ​​水平。无论有或没有 ERS ​​条件,Ca2+ 水平的增加都会导致迁移增加和吞噬作用减少。迁移是 RhoA 依赖性的,Ca2+ 或 CD205 与调节 imDC 的吞噬作用相关。我们的研究发现 SELENOK 是 imDC 迁移和吞噬作用所必需的。
Selenoprotein K (SELENOK) is an endoplasmic reticulum stress (ERS)-regulated protein required for the calcium (Ca2+) flux-mediated migration of T cells and neutrophils, and the migration and phagocytosis of macrophages and microglia. However, the effect of SELENOK on the regulation of the immune function of dendritic cells (DCs), including immature DCs (imDCs) and mature DCs (mDCs), is still unclear. In this study, imDCs prepared from SELENOK knockout mice were used to evaluate the effect of SELENOK on the migration and phagocytosis of imDCs. The results showed that ERS-induced downregulation of imDCs phenotypic markers led to a reduction in Ras homolog gene family member A (RhoA)-dependent migration and enhanced Ca2+/CD205-mediated phagocytosis. SELENOK deficiency-induced upregulation of selenoprotein S (SELENOS) attenuated ERS levels in imDCs. An increase in Ca2+ levels resulted in increased migration and decreased phagocytosis with or without ERS conditions. The migration was RhoA-dependent, and Ca2+ or CD205 was associated with regulating phagocytosis in imDCs. Our study found that SELENOK is required for imDC migration and phagocytosis.
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