血管光滑肌细胞PRDM16调节血压的昼夜变化
Zhenguo Wang1, Wenjuan Mu1, Juan Zhong1
1Department of Internal Medicine, Frankel Cardiovascular Center, University of Michigan, Ann Arbor, Michigan, USA.
The Journal of clinical investigation
|December 3, 2024
概括
血管光滑肌细胞中PR域含蛋白16 (PRDM16) 的破坏会改变血压的昼夜变化. 这影响上腺体信号传递和时钟基因调节,揭示了对血压控制的新见解.
科学领域:
- 心血管生理学心血管生理学
- 分子生物学分子生物学
- 时间生物学 时间生物学
背景情况:
- 血压 (BP) 昼夜节律的干扰与心血管疾病风险有关.
- 了解血压调节需要阐明其每日变化的分子机制.
- 血管光滑肌细胞 (VSMCs) 中的一种转录因子PR域含蛋白16 (PRDM16),在遗传上与BP特征有关.
研究的目的:
- 研究PRDM16在血压调节和昼夜变化的作用.
- 阐明PRDM16影响BP昼夜节律的分子机制.
主要方法:
- 产生特定于VSMC的Prdm16-knockout (Prdm16SMKO) 鼠标.
- 在Prdm16SMKO和对照小鼠中测量血压和评估血管活性.
- 识别PRDM16转录标和分析时钟基因表达.
主要成果:
- 在活动期间,Prdm16SMKO小鼠的血压显著降低,并破坏了血压昼夜变化.
- 来自Prdm16SMKO小鼠的中腔动脉环显示收缩反应减少.
- 上腺素受体α 1d (Adra1d) 被确定为PRDM16.的直接转录标.
- PRDM16显示了昼夜表达模式和调节的时钟基因,包括Npas2.2.
结论:
- 在VSMC中缺乏PRDM16会通过损害上腺体信号来破坏BP昼夜变化.
- PRDM16通过调节上腺素反应和时钟基因表达,在调节BP昼夜节律方面发挥着至关重要的作用.
- 这些发现为管理日常血压波动的机制提供了新的分子洞察力.
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