期刊
BLOOD
卷 137, 期 11, 页码 1517-1526出版社
AMER SOC HEMATOLOGY
DOI: 10.1182/blood.2020005407
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资金
- German Federal Ministry of Education and Research (Bundesministerium fur Bildung und Forschung) [01EO1003]
- German Research Foundation (Deutsche Forschungsmeinschaft) [BE 3685/4-1]
The cells and mechanisms involved in blood clot resorption are only partially known, with regulatory T cells playing a crucial role in regulating thrombolysis by controlling monocytes. The matricellular protein SPARC is shown to enhance monocyte activity and is crucial for blood clot resorption. Expanding Tregs within a therapeutic window can accelerate clot resorption.
The cells and mechanisms involved in blood clot resorption are only partially known. We show that regulatory T cells (Tregs) accumulate in venous blood clots and regulate thrombolysis by controlling the recruitment, differentiation and matrix metalloproteinase (MMP) activity of monocytes. We describe a clot Treg population that forms the matricellular acid- and cysteine-rich protein SPARC (secreted protein acidic and rich in cysteine) and show that SPARC enhances monocyte MMP activity and that SPARC(+) Tregs are crucial for blood clot resorption. By comparing different treatment times, we define a therapeutic window of Treg expansion that accelerates clot resorption.
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