生物技术进展 ›› 2025, Vol. 15 ›› Issue (4): 702-710.DOI: 10.19586/j.2095-2341.2025.0009

• 研究论文 • 上一篇    

小鼠胚胎主动脉-性腺-中肾区与成年骨髓巨核细胞的分子特征分析

蔡怡霏1,2(), 马叶子1,2, 夏美娟1,2, 刘翠翠1,2, 王洪涛1,2, 周家喜1,2()   

  1. 1.中国医学科学院血液病医院(中国医学科学院血液学研究所),血液与健康全国重点实验室,国家血液系统疾病临床医学研究中心,细胞生态海河实验室,天津 300020
    2.天津医学健康研究院,天津 301600
  • 收稿日期:2025-02-01 接受日期:2025-03-19 出版日期:2025-07-25 发布日期:2025-09-08
  • 通讯作者: 周家喜
  • 作者简介:蔡怡霏 E-mail: caiyifei@ihcams.ac.cn
  • 基金资助:
    国家自然面上基金项目(32271161);天津市科技计划项目-科技重大专项与工程(24ZXZSSS00080);中国医学科学院医学与健康科技创新工程项目(2021-I2M-1-073);细胞生态海河实验室“揭榜挂帅”项目(22HHXBSS00031)

Analysis of Molecular Characteristics of Megakaryocytes Between Embryonic Aorta-gonad-mesonephros and Adult Bone Marrow

Yifei CAI1,2(), Yezi MA1,2, Meijuan XIA1,2, Cuicui LIU1,2, Hongtao WANG1,2, Jiaxi ZHOU1,2()   

  1. 1.State Key Laboratory of Experimental Hematology,National Clinical Research Center for Blood Diseases,Haihe Laboratory of Cell Ecosystem,Institute of Hematology & Blood Diseases Hospital,Chinese Academy of Medical Sciences & Peking Union Medical College,Tianjin 300020,China
    2.Tianjin Institutes of Health Science,Tianjin 301600,China
  • Received:2025-02-01 Accepted:2025-03-19 Online:2025-07-25 Published:2025-09-08
  • Contact: Jiaxi ZHOU

摘要:

巨核细胞是主要存在于成年骨髓中、以产生血小板为主要功能的一类细胞,除此之外,成年期骨髓巨核细胞还具有维持造血干细胞(hematopoietic stem cells, HSC)稳态的作用。近年来研究发现,主动脉-性腺-中肾区(aorta-gonad-mesonephros, AGM)中也存在巨核细胞,并且其参与调控造血干细胞前体(pre-HSC)的产生及成熟。AGM区是最早产生HSC的部位,而骨髓是成年期HSC定居和造血的主要位点,巨核细胞是否在这2个位点通过不同的分子机制调控HSC的发育和功能尚不明确。基于近期报道的小鼠胚胎期AGM区巨核细胞及成年骨髓巨核细胞的单细胞转录组数据,对二者的整体分子特征以及调控HSC生物学过程相关的分子特征进行了对比分析。结果发现,小鼠AGM区巨核细胞与成年期骨髓巨核细胞的分子特征存在较大差异。其中,AGM区巨核细胞高表达细胞增殖、循环系统发育、干细胞发育及分化等分子特征;而成年骨髓巨核细胞高表达免疫反应、外界刺激应答、止凝血、细胞通讯等分子特征。此外,AGM区巨核细胞与成年骨髓巨核细胞高表达不同的与HSC调控相关的分子。研究结果提示,AGM区巨核细胞和成年期骨髓巨核细胞可能通过不同的功能分子调控HSC的发育及功能,可为研究胚胎期和成年期巨核细胞的功能差异及其分子机制提供理论依据。

关键词: 巨核细胞, 主动脉-性腺-中肾区, 骨髓, 造血干细胞, 单细胞转录组测序

Abstract:

Megakaryocytes are a type of cell primarily present in adult bone marrow, with the main function of producing platelets. In addition, adult bone marrow megakaryocytes also play a role in maintaining the homeostasis of hematopoietic stem cells (HSCs). Recent studies have revealed that megakaryocytes also exist in the aorta-gonad-mesonephros (AGM) region and are involved in regulating the generation and maturation of hematopoietic stem cell precursors (pre-HSCs). The AGM region is the earliest site for HSC production, while the bone marrow is the main site for HSC colonization and hematopoiesis in adulthood. However, it remains unclear whether megakaryocytes regulate HSC development and function through distinct molecular mechanisms at these two sites. Based on recently reported single-cell transcriptome data of megakaryocytes from the AGM region in mouse embryos and from adult bone marrow, we performed a comparative analysis of their overall molecular characteristics and the molecular features associated with regulating HSC biological processes. The results showed significant differences in molecular characteristics between AGM region megakaryocytes and adult bone marrow megakaryocytes in mice. Specifically, AGM region megakaryocytes highly expressed molecular features related to cell proliferation, circulatory system development, stem cell development, and differentiation; in contrast, adult bone marrow megakaryocytes highly expressed molecular features associated with immune response, response to external stimuli, hemostasis and coagulation, and cell communication. Furthermore, AGM region megakaryocytes and adult bone marrow megakaryocytes highly expressed different HSC regulation-related molecules. These findings suggested that megakaryocytes in the AGM region and adult bone marrow may regulate HSC development and function through distinct functional molecules, providing a theoretical basis for investigating the functional differences between embryonic and adult megakaryocytes and their underlying molecular mechanisms.

Key words: megakaryocytes, aorta-gonad-mesonephros, bone marrow, hematopoietic stem cells, single-cell transcrriptome

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