漿細胞樣樹突狀細胞由Ly6D+淋巴祖細胞發育而來
作者:
小柯機器人發布時間:2019/7/28 18:34:14
新加坡A-STAR研究所的Florent Ginhoux研究組揭示了漿細胞樣樹突狀細胞由不同於髓系的Ly6D+淋巴祖細胞發育而來。該項研究成果發表在2019年7月出版的《自然—免疫學》上。
通過單細胞轉錄組學、質譜、體內細胞命運示蹤以及體外克隆分析等手段,研究人員發現,在單細胞層面,小鼠造血祖細胞向pDC譜系的分化發生在共同淋巴祖細胞的階段,這也就表明pDC和cDC譜系在分化早期就發生分支。研究人員進一步定義了pDC前體細胞階段的轉錄特徵,即存在於IL-7R+的共同淋巴祖細胞亞群中,並以Ly6D、IL-7R、CD81 和CD2作為pDC分化的關鍵標誌物,這些特徵將pDC的前體細胞區別於cDC的前體細胞。總而言之,這項工作表明,pDC在骨髓中由一群Ly6D和CD2高表達的淋巴祖細胞發育而來,並且不同於髓系來源的cDC的分化過程。
目前,樹突狀細胞(DC)被分為兩類,一種是常規DC(cDC),另一種是漿細胞樣DC(pDC)。
附:英文原文
Title: Plasmacytoid dendritic cells develop from Ly6D + lymphoid progenitors distinct from the myeloid lineage
Author: Regine J. Dress, Charles-Antoine Dutertre, Amir Giladi, Andreas Schlitzer, Ivy Low, Nurhidaya Binte Shadan, Alicia Tay, Josephine Lum, Muhammad Faris Bin Mohd Kairi, You Yi Hwang, Etienne Becht, Yang Cheng, Marion Chevrier, Anis Larbi, Evan W. Newell, Ido Amit, Jinmiao Chen, Florent Ginhoux
Issue&Volume: Volume 20 Issue 7, July 2019
Abstract: Dendritic cells (DC) are currently classified as conventional DCs (cDCs) and plasmacytoid DCs (pDCs). Through a combination of single-cell transcriptomic analysis, mass cytometry, in vivo fate mapping and in vitro clonal assays, here we show that, at the single-cell level, the priming of mouse hematopoietic progenitor cells toward the pDC lineage occurs at the common lymphoid progenitor stage, indicative of early divergence of the pDC and cDC lineages. We found the transcriptional signature of a pDC precursor stage, defined here, in the IL-7R+ common lymphoid progenitor population and identified Ly6D, IL-7R, CD81 and CD2 as key markers of pDC differentiation, which distinguish pDC precursors from cDC precursors. In conclusion, pDCs developed in the bone marrow from a Ly6DhiCD2hi lymphoid progenitor cell and differentiated independently of the myeloid cDC lineage.
DOI: 10.1038/s41590-019-0420-3
Source:https://www.nature.com/articles/s41590-019-0420-3