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Single platelet and megakaryocyte morpho-dynamics uncovered by multicolor reporter mouse strains in vitro and in vivo.
Haematologica ( IF 8.2 ) Pub Date : 2021-09-16 , DOI: 10.3324/haematol.2021.278896
Leo Nicolai 1 , Rainer Kaiser 1 , Raphael Escaig 1 , Marie-Louise Hoffknecht 1 , Afra Anjum 1 , Alexander Leunig 1 , Joachim Pircher 1 , Andreas Ehrlich 2 , Michael Lorenz 2 , Hellen Ishikawa-Ankerhold 2 , William C Aird 3 , Steffen Massberg 1 , Florian Gaertner 4
Affiliation  

Visualizing cell behavior and effector function on a single cell level has been crucial for understanding key aspects of mammalian biology. Due to their small size, large number and rapid recruitment into thrombi, there is a lack of data on fate and behavior of individual platelets in thrombosis and hemostasis. Here we report the use of platelet lineage restricted multi-color reporter mouse strains to delineate platelet function on a single cell level. We show that genetic labeling allows for single platelet and megakaryocyte tracking and morphological analysis in vivo and in vitro, while not affecting lineage functions. Using Credriven Confetti expression, we provide insights into temporal gene expression patterns as well as spatial clustering of megakaryocytes in the bone marrow. In the vasculature, shape analysis of activated platelets recruited to thrombi identifies ubiquitous filopodia formation with no evidence of lamellipodia formation. Single cell tracking in complex thrombi reveals prominent myosin-dependent motility of platelets and highlights thrombus formation as a highly dynamic process amenable to modification and intervention of the acto-myosin cytoskeleton. Platelet function assays combining flow cytrometry, as well as in vivo, ex vivo and in vitro imaging show unaltered platelet functions of multicolor reporter mice compared to WT controls. In conclusion, platelet lineage multicolor reporter mice prove useful in furthering our understanding of platelet and megakaryocyte biology on a single cell level.

中文翻译:

体外和体内多色报告小鼠品系揭示的单血小板和巨核细胞形态动力学。

在单个细胞水平上可视化细胞行为和效应器功能对于理解哺乳动物生物学的关键方面至关重要。由于它们体积小、数量多且快速募集到血栓中,因此缺乏关于单个血小板在血栓形成和止血中的命运和行为的数据。在这里,我们报告了使用血小板谱系受限的多色报告小鼠品系来描述单细胞水平上的血小板功能。我们表明,基因标记允许在体内和体外进行单个血小板和巨核细胞的跟踪和形态分析,同时不影响谱系功能。使用 Credriven Confetti 表达,我们提供了对时间基因表达模式以及骨髓中巨核细胞空间聚类的见解。在脉管系统中,招募到血栓的活化血小板的形状分析确定了普遍存在的丝状伪足形成,没有片状伪足形成的证据。复杂血栓中的单细胞追踪揭示了血小板的显着肌球蛋白依赖性运动,并强调血栓形成是一个高度动态的过程,可以修改和干预肌动蛋白细胞骨架。结合流式细胞术以及体内、离体和体外成像的血小板功能测定显示,与 WT 对照相比,多色报告小鼠的血小板功能未改变。总之,血小板谱系多色报告小鼠证明有助于进一步了解单细胞水平上的血小板和巨核细胞生物学。复杂血栓中的单细胞追踪揭示了血小板的显着肌球蛋白依赖性运动,并强调血栓形成是一个高度动态的过程,可以修改和干预肌动蛋白细胞骨架。结合流式细胞术以及体内、离体和体外成像的血小板功能测定显示,与 WT 对照相比,多色报告小鼠的血小板功能未改变。总之,血小板谱系多色报告小鼠证明有助于进一步了解单细胞水平上的血小板和巨核细胞生物学。复杂血栓中的单细胞追踪揭示了血小板的显着肌球蛋白依赖性运动,并强调血栓形成是一个高度动态的过程,可以修改和干预肌动蛋白细胞骨架。结合流式细胞术以及体内、离体和体外成像的血小板功能测定显示,与 WT 对照相比,多色报告小鼠的血小板功能未改变。总之,血小板谱系多色报告小鼠证明有助于进一步了解单细胞水平上的血小板和巨核细胞生物学。与 WT 对照相比,离体和体外成像显示多色报告小鼠的血小板功能未改变。总之,血小板谱系多色报告小鼠证明有助于进一步了解单细胞水平上的血小板和巨核细胞生物学。与 WT 对照相比,离体和体外成像显示多色报告小鼠的血小板功能未改变。总之,血小板谱系多色报告小鼠证明有助于进一步了解单细胞水平上的血小板和巨核细胞生物学。
更新日期:2021-09-16
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