成體神經幹細胞通過TNF-α受體信號通路響應全身炎症
作者:
小柯機器人發布時間:2020/11/19 11:12:15
西班牙瓦倫西亞大學Isabel Farias和Jose Manuel Morante-Redolat團隊在研究中取得進展。他們研究發現成體神經幹細胞(SCs)通過TNF-α受體信號通路響應全身炎症。相關論文發表在2020年11月17日出版的《細胞-幹細胞》雜誌上。
研究人員研發了一種多級策略來分析這些單神經SC(NSC)的狀態,以發現調節其靜態/激活水平的信號。研究表明狀態之間的過渡發生在體內,並且可以在培養細胞中觀察激活和始發態但非靜態的細胞。研究還顯示,外周誘導的炎症促進了由腫瘤壞死因子α(TNF-α)通過其受體TNF受體2(TNFR2)介導的致敏NSC(pNSCs)瞬時激活,並在TNF受體1中恢復了靜止(TNFR1)依賴的方式。該研究數據確定了促進NSC開啟的信號傳導途徑,並提出了新的概念,即SC可以響應系統環境。
據悉,SCs在細胞周期與尚且未知的靜態細胞之間轉換。已從室管膜下區(SEZ)獲得了靜態、始發態和激活態NSC的轉錄組,但尚不清楚這些狀態在穩態下的功能調節。
附:英文原文
Title: Adult Neural Stem Cells Are Alerted by Systemic Inflammation through TNF-α Receptor Signaling
Author: Germán Belenguer, Pere Duart-Abadia, Antonio Jordán-Pla, Ana Domingo-Muelas, Laura Blasco-Chamarro, Sacri R. Ferrón, Jose Manuel Morante-Redolat, Isabel Farias
Issue&Volume: 2020-11-17
Abstract: Adult stem cells (SCs) transit between the cell cycle and a poorly defined quiescentstate. Single neural SCs (NSCs) with quiescent, primed-for-activation, and activatedcell transcriptomes have been obtained from the subependymal zone (SEZ), but the functionalregulation of these states under homeostasis is not understood. Here, we develop amultilevel strategy to analyze these NSC states with the aim to uncover signals thatregulate their level of quiescence/activation. We show that transitions between statesoccur in vivo and that activated and primed, but not quiescent, states can be captured and studiedin culture. We also show that peripherally induced inflammation promotes a transientactivation of primed NSCs (pNSCs) mediated by tumor necrosis factor α (TNF-α) actingthrough its receptor, TNF receptor 2 (TNFR2), and a return to quiescence in a TNFreceptor 1 (TNFR1)-dependent manner. Our data identify a signaling pathway promotingNSC alertness and add to the emerging concept that SCs can respond to the systemicmilieu.
DOI: 10.1016/j.stem.2020.10.016
Source: https://www.cell.com/cell-stem-cell/fulltext/S1934-5909(20)30510-5