描述右心室对急性压力过载的空间时空转录组反应
Vitaly O Kheyfets1, Sushil Kumar1, Paul M Heerdt2
1Paediatric Critical Care Medicine, Developmental Lung Biology and CVP Research Laboratories, School of Medicine, University of Colorado, Aurora, CO 80045, USA.
International journal of molecular sciences
|June 10, 2023
概括
最初的压力过载的严重程度,而不是最终的后负载,决定了右心室 (RV) 组织.
科学领域:
- 心血管生物学 心血管生物学
- 分子生物学分子生物学
- 文字转录学 (Transcriptomics) 是一个学科.
背景情况:
- 肺高血压 (PH) 涉及慢性右心室 (RV) 压力过载.
- 了解RV对机械应力的动态转录反应对于PH研究至关重要.
- 现有的模型提供了洞察力,但可能无法完全捕捉最初的压力反应.
研究的目的:
- 分析RV组织对肺栓塞 (PE) 诱导的机械应激的动态转录反应.
- 为了将这种反应与已建立的实验性肺高血压 (PH) 模型进行比较.
- 调查压力严重程度和位置对RV基因表达的影响.
主要方法:
- 对55只暴露于PE的老鼠的RV组织进行微阵列分析.
- 在11个不同的时间点和RV地点采样.
- 主要组件分析 (PCA) 用于时间空间基因表达集群.
- 使用PCA系数进行基因组丰富分析,以确定相关途径.
主要成果:
- RV转录的签名高度依赖于最初的PE损伤的严重程度.
- 严重的PE在6周后显示了与PH模型相似的RV外流通道中的丰富通道.
- 不管PE的严重程度如何,RV顶部的转录学特征与对照组织相似.
- 最初的压力过载严重程度决定了转录组反应轨迹,独立于最终的后载荷.
结论:
- RV组织活检的位置显著影响观察到的转录基因特征.
- 初始压力过载的严重程度是RV的转录轨迹的关键决定因素.
- 在PH中慢性RV压力过载可能会朝着共享的转录基因终点发展.
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