中國科學家解析人類巨核細胞的發育過程
作者:
小柯機器人發布時間:2020/12/21 13:39:58
近日,中國醫學科學院周家喜、劉兵、石莉紅等研究人員合作解析人類巨核細胞的發育過程。這一研究成果於2020年12月18日在線發表在《細胞—幹細胞》雜誌上。
通過使用來自卵黃囊(YS)和胎兒肝(FL)的人類早期巨核細胞(MK)單細胞RNA測序,研究人員表徵了早期巨核細胞生成的轉錄組、細胞異質性和發育軌跡。在YS和FL中,研究人員發現異質MK亞群具有獨特的發育途徑和基因表達模式,可以反映早期的功能分化。有趣的是,研究人員在體內鑑定了一個CD42b+CD14+MK亞群,該亞群顯示出免疫反應相關基因的高表達,並且也可以在體外從人類胚胎幹細胞(hESC)中產生。此外,研究人員將THBS1鑑定為MK傾向的胚胎內皮細胞早期標記。總體而言,這項研究為解剖早期人類巨核細胞生成的分子和細胞程序提供了重要的見識和寶貴的資源。
據了解,儘管人們對胚胎免疫發育的了解日益加深,但稀有的早期MK仍然研究不足。
附:英文原文
Title: Decoding Human Megakaryocyte Development
Author: Hongtao Wang, Jian He, Changlu Xu, Xiaoyuan Chen, Hua Yang, Shujuan Shi, Cuicui Liu, Yang Zeng, Dan Wu, Zhijie Bai, Mengge Wang, Yuqi Wen, Pei Su, Meijuan Xia, Baiming Huang, Chunyu Ma, Lihong Bian, Yu Lan, Tao Cheng, Lihong Shi, Bing Liu, Jiaxi Zhou
Issue&Volume: 2020-12-18
Abstract: Despite our growing understanding of embryonic immune development, rare early megakaryocytes(MKs) remain relatively understudied. Here we used single-cell RNA sequencing of humanMKs from embryonic yolk sac (YS) and fetal liver (FL) to characterize the transcriptome,cellular heterogeneity, and developmental trajectories of early megakaryopoiesis.In the YS and FL, we found heterogeneous MK subpopulations with distinct developmentalroutes and patterns of gene expression that could reflect early functional specialization.Intriguingly, we identified a subpopulation of CD42b+CD14+ MKs in vivo that exhibit high expression of genes associated with immune responses and can alsobe derived from human embryonic stem cells (hESCs) in vitro. Furthermore, we identified THBS1 as an early marker for MK-biased embryonic endothelialcells. Overall, we provide important insights and invaluable resources for dissectionof the molecular and cellular programs underlying early human megakaryopoiesis.
DOI: 10.1016/j.stem.2020.11.006
Source: https://www.cell.com/cell-stem-cell/fulltext/S1934-5909(20)30544-0