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血胆酸升高与年轻Cyp2c70小鼠的心脏压力和炎症相吻合
Hilde D de Vries1,2, Tim R Eijgenraam3,4, Vincent W Bloks3
1Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
Pediatric research
|October 2, 2024
概括
生命早期高胆酸 (BAs) 会导致心脏压力和小鼠的炎症. Ursodeoxycholic 酸 (UDCA) 治疗使基因表达正常化,这表明它对 BA 诱导的心脏并发症有保护作用.
科学领域:
- 心血管生物学 心血管生物学
- 肝病学 肝病学是一种肝病学.
- 发展生物学 发展生物学
背景情况:
- 血胆酸 (BAs) 的升高与心脏异常有关,例如妊娠的肝内胆固醇和新生儿胆固醇.
- 新生儿胆固醇形成的肝外影响,特别是对心脏的影响,仍未得到充分研究.
- Cyp2c70-/-小鼠具有与人类相似的BA形状,并表现出新生儿胆固醇形成的特征,为研究BA效应提供了一个模型.
研究的目的:
- 在Cyp2c70-/-小鼠中研究循环胆汁酸 (BAs) 升高的急性心脏影响.
- 探索高血BA水平对心脏基因表达特征的影响.
- 评估 Ursodeoxycholic 酸 (UDCA) 在缓解 BA 诱导的心脏变化的潜力.
主要方法:
- 对3周大的Cyp2c70-/-小鼠的心脏进行了RNA测序.
- 心脏转录组在野生型,低BA Cyp2c70-/-,高BA Cyp2c70-/-和UDCA治疗的Cyp2c70-/-组之间进行了比较.
- 分析了基因表达数据,以确定差异表达的基因及其与血BA水平的相关性.
主要成果:
- 在Cyp2c70-/-小鼠的心脏中,1355个基因具有高与低血BA的差异表达,具有显著的炎症过程丰富.
- 这些差异表达基因中的1053个 (78%) 的表达在幼中正常化,其母接受了围产期UDCA治疗.
- 在645个心脏基因和血BA水平之间发现了强烈的相关性,其中172个基因与心血管疾病有关.
结论:
- 血胆酸的升高显著改变了与人类相似的BA组成的小鼠的心脏基因表达特征,表明心脏应激和炎症.
- 这些发现支持了这样一个假设:高循环的BA水平可以在早期发育过程中导致心脏并发症.
- 在Cyp2c70-/-幼中,UDCA的周产期给药有效地防止了心脏基因表达模式的失调,突出了其治疗潜力.
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