人胸腺来源的效应调节性Tregs 的免疫抑制依赖于葡萄糖/乳酸驱动的脂肪酸合成。
Immune suppression by human thymus-derived effector Tregs relies on glucose/lactate-fueled fatty acid synthesis.
发表日期:2024 Aug 23
作者:
Sander de Kivit, Mark Mensink, Sarantos Kostidis, Rico J E Derks, Esther A Zaal, Marieke Heijink, Lotte J Verleng, Evert de Vries, Ellen Schrama, Niek Blomberg, Celia R Berkers, Martin Giera, Jannie Borst
来源:
Cellular & Molecular Immunology
摘要:
调节性 T 细胞 (Treg) 抑制促炎性常规 T 细胞 (Tconv) 反应。由于脂质影响细胞信号传导和功能,我们比较了 CD4 胸腺来源的 (t)Treg 和 Tconv 的脂质组成。脂质组学揭示了 Tconv 中的中性脂质和 tTreg 中的磷脂的组成型富集。 TNFR2 共同刺激的效应 tTreg 和 Tconv 都是糖酵解的,但只有 tTreg 中糖酵解和三羧酸 (TCA) 循环与脂肪酸 (FA) 合成 (FAS) 的增强相关,并得到相关基因表达的支持。 tTreg 中的 FA 链比 Tconv 中的更长且更不饱和。与 Tconv 相比,tTreg 有效地使用乳酸或葡萄糖进行 FAS,并依赖此过程进行增殖。 FASN 和 SCD1 是负责 FAS 和 FA 去饱和的酶,被证明对于 tTreg 抑制 Tconv 的能力至关重要。这些数据阐明了效应 tTregs 如何在葡萄糖水平有限但乳酸水平丰富的发炎或癌变组织中茁壮成长。版权所有 © 2024 作者。由爱思唯尔公司出版。保留所有权利。
Regulatory T cells (Tregs) suppress pro-inflammatory conventional T cell (Tconv) responses. As lipids impact cell signaling and function, we compare the lipid composition of CD4+ thymus-derived (t)Tregs and Tconvs. Lipidomics reveal constitutive enrichment of neutral lipids in Tconvs and phospholipids in tTregs. TNFR2-co-stimulated effector tTregs and Tconvs are both glycolytic, but only in tTregs are glycolysis and the tricarboxylic acid (TCA) cycle linked to a boost in fatty acid (FA) synthesis (FAS), supported by relevant gene expression. FA chains in tTregs are longer and more unsaturated than in Tconvs. In contrast to Tconvs, tTregs effectively use either lactate or glucose for FAS and rely on this process for proliferation. FASN and SCD1, enzymes responsible for FAS and FA desaturation, prove essential for the ability of tTregs to suppress Tconvs. These data illuminate how effector tTregs can thrive in inflamed or cancerous tissues with limiting glucose but abundant lactate levels.Copyright © 2024 The Author(s). Published by Elsevier Inc. All rights reserved.