Non-canonical NFKB signaling endows suppressive function through FOXP3-dependent regulatory T cell program.

Non-canonical NFKB signaling endows suppressive function through FOXP3-dependent regulatory T cell program.
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DOI:
10.1016/j.heliyon.2023.e22911
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发表时间:
2023-12
期刊:
影响因子:
4
通讯作者:
Manome, Yoshinobu
Manome, Yoshinobu
中科院分区:
综合性期刊4区
文献类型:
--
作者:
Sato, Yohei;Osada, Erika;Manome, Yoshinobu

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调节性 T 细胞 (Treg) 在调节人类和小鼠的适应性免疫反应中发挥着核心作用。激活 B 细胞 (NFKB) 信号传导的非经典核因子“κ-轻链增强子”在人类 Tregs 中的精确生物学作用尚未完全阐明。为了深入了解这一过程,使用 CRISPR/Cas9 对 Treg 样细胞系 (MT-2) 进行了基因改造。有趣的是,NFKB2 敲除的 MT-2 细胞表现出 FOXP3 的下调,而 NFKB1 敲除则没有。此外,在 NFKB2 敲除的 MT-2 细胞中,FOXP3 依赖性分子的 mRNA 表达显着降低。为了更好地了解 NFKB 信号传导的功能作用,使用 CRISPR/Cas9 对人类初级 Tregs 的 NFKB1/NFKB2 基因座进行了基因编辑。与 MT-2 细胞类似,NFKB2 敲除的人类 Tregs 的 FOXP3 表达显着降低。此外,与野生型和 NFKB1 敲除的 Tregs 相比,NFKB2 敲除的人类 Tregs 表现出 FOXP3 依赖性分子的下调和抑制功能的减弱。这些发现表明,非经典 NFKB 信号传导通过 FOXP3 依赖性调节性 T 细胞程序维持人类 Treg 中的 Treg 样表型和抑制功能。
Regulatory T cells (Tregs) play a central role in modulating adaptive immune responses in humans and mice. The precise biological role of non-canonical nuclear factor ‘κ-light-chain-enhancer’ of activated B cells (NFKB) signaling in human Tregs has yet to be fully elucidated. To gain insight into this process, a Treg-like cell line (MT-2) was genetically modified using CRISPR/Cas9. Interestingly, NFKB2 knockout MT-2 cells exhibited downregulation of FOXP3, while NFKB1 knockout did not. Additionally, mRNA expression of FOXP3-dependent molecules was significantly reduced in NFKB2 knockout MT-2 cells. To better understand the functional role of the NFKB signaling, the NFKB1/NFKB2 loci of human primary Tregs were genetically edited using CRISPR/Cas9. Similar to MT-2 cells, NFKB2 knockout human Tregs displayed significantly reduced FOXP3 expression. Furthermore, NFKB2 knockout human Tregs showed downregulation of FOXP3-dependent molecules and a diminished suppressive function compared to wild-type and NFKB1 knockout Tregs. These findings indicate that non-canonical NFKB signaling maintains a Treg-like phenotype and suppressive function in human Tregs through the FOXP3-dependent regulatory T cell program.
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