心脏对迷走神经刺激的转录反应
Daniel O Kellett1, Qadeer Aziz1,2, Jonathan D Humphries3
1Centre for Cardiovascular and Metabolic Neuroscience, Department of Neuroscience, Physiology and Pharmacology, University College London, London, UK.
Physiological genomics
|July 29, 2024
概括
神经刺激 (VNS) 显著改变了心脏基因表达,影响了与蛋白质合成,炎症和增高相关的途径. 这项研究揭示了由于VNS导致心脏的分子变化,支持其对心血管疾病的治疗潜力.
科学领域:
- 心血管科学 心血管科学
- 神经科学是一个神经科学.
- 分子生物学分子生物学
背景情况:
- 心力衰竭是一个重大的临床挑战,治疗方法包括药物,设备和神经调节疗法,如迷走神经刺激 (VNS).
- 了解对VNS的遗传和分子心脏反应对于其在心血管疾病治疗中的应用至关重要.
研究的目的:
- 为了研究在选择性刺激阴道异位活动后,心室肌肉中的即时转录变化.
- 为了阐明心脏中阴道神经调节所调节的分子通路.
主要方法:
- 在大鼠模型中使用光遗传学方法来选择性地刺激表达通道罗多普辛的阴道前质神经元.
- 进行左心室心肌的RNA测序,以确定差异表达基因 (DEGs).
- 途径分析 (Qiagen Ingenuity Pathway Analysis) 用于解释已识别的DEGs的功能影响.
主要成果:
- RNA测序确定了心室肌肉中294个差异表达的基因.
- 路径分析揭示了118条正规路径的调制,对蛋白质合成,自,纤维化,炎症和心脏缩有显著影响.
- 预测的上游调节者包括转录因子 (MYC,NRF1) 和微RNA (miR-335-3p,miR-338-3p).
结论:
- 神经刺激深深地影响心肌基因表达,调节关键的生物通路.
- 观察到的转录反应支持增强阴道活动对心脏健康的有益影响.
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