PGE2-EP4在小鼠动脉管的发育编程中的新角色:对血管成熟和功能的影响
Michael T Yarboro1, Naoko Boatwright2, Deanna C Sekulich2
1Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, United States.
American journal of physiology. Heart and circulatory physiology
|August 11, 2023
概括
前列腺素E2受体EP4对于动脉管的发育和关闭至关重要. 破坏EP4信号传输导致不成熟的动脉管道,导致出生后持续的穿透性.
科学领域:
- 心血管生理学心血管生理学
- 发展生物学 发展生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 动脉管 (DA) 对于胎儿的血液循环至关重要,需要前列腺素E2 (PGE2) 通过EP4受体传递信号以获得通透性.
- 在子宫中受损的PGE2-EP4信号异常导致出生后的专利DA (PDA),这表明EP4.的发育作用.
研究的目的:
- 通过EP4敲击小鼠和药理方法,研究EP4信号在DA发育和功能中的作用.
- 确定EP4影响DA关闭的特定发展窗口和机制.
主要方法:
- 使用了EP4淘汰赛小鼠和急性和慢性药理学EP4对抗.
- 进行表达分析,抑制剂研究和肌形图,以评估DA功能和收缩性.
- 分析了DA成熟度标志物和氧化 (NO) 灵敏度.
主要成果:
- EP4是从怀孕中期到预产期的DA中的主要EP受体,介导血管扩张.
- 慢性EP4对抗性重现了淘汰现型,揭示了EP4刺激的关键发育窗口.
- EP4敲击的DA表现出受损的收缩能力,改变的信号,不完整的发展和中断的重塑,这是一个不成熟的血管的特征.
结论:
- 怀孕晚期的EP4信号对于建立功能期DA和确保其产后闭合至关重要.
- 破坏EP4信号会导致一个不成熟的DA与受损的关闭机制.
- 这些发现为婴儿在怀孕期间接触NSAID的PDA背后的机制提供了洞察力.
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