ACKR3的激动性诱导与化学因子受体CXCR4的异构化,并减弱血小板功能
Valerie Dicenta-Baunach1, Zoi Laspa1, David Schaale1
1Department of Cardiology and Angiology, University Hospital Tübingen, Eberhard Karls University Tübingen, Tübingen, Germany.
血小板受体ACKR3和CXCR4形成异构体,其中ACKR3的激动性抑制了血小板激活. 这表明ACKR3激动剂可能在心血管疾病中具有治疗潜力.
科学领域:
- 心血管生物学 心血管生物学
- 血小板生理学 血小板生理学
- 接收器信号传输 接收器信号传输
背景情况:
- 血小板受体CXCR4和ACKR3与心血管疾病有关.
- 激活CXCR4会诱导血小板聚合,而激活ACKR3会抑制血小板聚合.
- 核细胞中的ACKR3/CXCR4异构调节CXCL12信号传递.
研究的目的:
- 研究血小板中ACKR3/CXCR4异构体的形成.
- 确定ACKR3/CXCR4异体化对血小板活动的功能影响.
主要方法:
- 接近结合试验 (PLA) 用于检测ACKR3/CXCR4异构体.
- 对依赖CXCL12的血小板聚合和ex vivo血栓形成的评估.
- 测量细胞内和Akt信号通路.
- 对周期性腺单酸盐 (cAMP) 水平的分析.
主要成果:
- 诱导ACKR3/CXCR4异构体形成的,是ACKR3的激素,而不是其他激素.
- ACKR3的激动性显著降低了依赖CXCL12的血小板聚合和血栓形成.
- ACKR3激动剂抑制了CXCL12诱导的细胞内和Akt信号的增加.
- ACKR3激动剂抵消了依赖CXCL12的血小板cAMP水平的下降.
结论:
- 血小板ACKR3/CXCR4异构体的形成是依赖ACKR3的.
- ACKR3的激素减轻CXCL12/CXCR4依赖的血小板激活,可能通过调节G蛋白信号传递.
- ACKR3激动剂在心血管疾病中显示出潜在的治疗应用.
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