成纖維細胞網狀細胞促進T細胞代謝與存活
作者:
小柯機器人發布時間:2019/10/22 16:14:05
美國丹娜法伯癌症研究所Shannon J. Turley、W. Nicholas Haining以及哈佛醫學院Arlene H. Sharpe等研究人員合作發現,成纖維細胞網狀細胞(FRC)通過表觀遺傳重塑促進T細胞的代謝與存活。相關論文在線發表於2019年10月21日的《自然—免疫學》。
研究人員發現,與FRC的接觸增強了細胞因子的產生,並通過白介素6在新激活的CD8陽性 T細胞中重塑了染色質的可及性。這些表觀遺傳學變化促進了代謝重編程,並通過差異轉錄因子的活性放大了生存途徑的活性。因此,FRC的調控顯著增強了病毒特異性CD8陽性T細胞在體內的持久性,並增強了它們向組織駐留記憶T細胞的分化。
這項研究表明,FRC的作用不僅限於限制T細胞擴增,它們還可以影響CD8陽性T細胞的命運和功能。
據介紹,淋巴結FRC通過釋放一氧化氮來響應活化T細胞的信號,這抑制T細胞增殖並限制了擴增的T細胞池的大小。與FRC的相互作用是否還支持活化的CD8 陽性T細胞的功能或分化尚不清楚。
附:英文原文
Title:Fibroblastic reticular cells enhance T cell metabolism and survival via epigenetic remodeling
Author:Flavian D. Brown, Debattama R. Sen, Martin W. LaFleur, Jernej Godec, Veronika Lukacs-Kornek, Frank A. Schildberg, Hye-Jung Kim, Kathleen B. Yates, Stéphane J. H. Ricoult, Kevin Bi, Justin D. Trombley, Varun N. Kapoor, Illana A. Stanley, Viviana Cremasco, Nika N. Danial, Brendan D. Manning, Arlene H. Sharpe, W. Nicholas Haining & Shannon J. Turley
Issue&Volume:21 October 2019
Abstract:
Lymph node fibroblastic reticular cells (FRCs) respond to signals from activated T cells by releasing nitric oxide, which inhibits T cell proliferation and restricts the size of the expanding T cell pool. Whether interactions with FRCs also support the function or differentiation of activated CD8+ T cells is not known. Here we report that encounters with FRCs enhanced cytokine production and remodeled chromatin accessibility in newly activated CD8+ T cells via interleukin-6. These epigenetic changes facilitated metabolic reprogramming and amplified the activity of pro-survival pathways through differential transcription factor activity. Accordingly, FRC conditioning significantly enhanced the persistence of virus-specific CD8+ T cells in vivo and augmented their differentiation into tissue-resident memory T cells. Our study demonstrates that FRCs play a role beyond restricting T cell expansion—they can also shape the fate and function of CD8+ T cells.
DOI:10.1038/s41590-019-0515-x