过度表达SARAF会损害新生儿血小板中由血栓诱导的Ca2+平静
Alejandro Berna-Erro1, Maria P Granados2, Raul Teruel-Montoya3
1Department of Physiology (PHYCELL Group), University of Extremadura, Caceres, Spain.
British journal of haematology
|December 8, 2023
概括
新生儿血小板显示 (Ca2+) 调节受损,导致低血诱导的聚合. 这与储量和摄入量发生变化有关,特别是在早产新生儿中.
科学领域:
- 血液学 血液学 血液学
- 细胞生物学 细胞生物学
- 新生儿生理学 新生儿生理学
背景情况:
- 新生儿血小板对血 (Thr) 的反应减少,影响Thr诱导的聚合,特别是在早产婴儿中.
- 损伤的 (Ca2+) 恒温是新生儿血小板的一个已知的问题,但其潜在机制仍然不清楚.
研究的目的:
- 调查新生儿血小板中Ca2+稳态受损的原因.
- 阐明新生儿血小板中缺陷的Ca2+调动和流入背后的分子机制.
主要方法:
- 在新生儿,母亲和对照血小板中对Thr的反应中比较了Ca2+调动和流入.
- 通过使用 PAR-1 激动剂 (SFLLRN) 和 SERCA3 抑制来研究 Ca2+ 调动.
- 分析了STIM1,SARAF,PDCD61/ALG2的相互作用和SARAF的无处不在.
- 在对Thr.的反应中评估了pannexin 1的透性.
主要成果:
- 与对照人群相比,新生儿血小板显示Ca2+调动和Thr刺激的流入减少.
- 新生儿血小板中的SARAF过度表达增加了STIM1/SARAF相互作用和延长了SARAF半衰期.
- 与对照组不同,新生儿血小板中的Thr并没有增强Pannexin 1通道的透性.
结论:
- 新生儿血小板有改变的细胞内Ca2+储存和有缺陷的Ca2+进入机制.
- 不调节的Ca2+稳态,涉及SARAF和pannexin 1,有助于新生儿的血小板聚合受损.
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