Robarts Research Institute, Department of Physiology and Pharmacology, Schulich School of Medicine, University of Western Ontario, London, Ontario N6A 5B7, Canada; email:
Department of Physiology and Pharmacology, Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta T2N 4N1, Canada.
Annu Rev Pharmacol Toxicol. 2018 Jan 6;58:391-410. doi: 10.1146/annurev-pharmtox-010617-052623. Epub 2017 Oct 2.
Arterial tone is coordinated among vessel segments to optimize nutrient transport and organ function. Coordinated vasomotor activity is remarkable to observe and depends on stimuli, sparsely generated in tissue, eliciting electrical responses that conduct lengthwise among electrically coupled vascular cells. The conducted response is the focus of this topical review, and in this regard, the authors highlight literature that advances an appreciation of functional significance, cellular mechanisms, and biophysical principles. Of particular note, this review stresses that conduction is enabled by a defined pattern of charge movement along the arterial wall as set by three key parameters (tissue structure, gap junctional resistivity, and ion channel activity). The impact of disease on conduction is carefully discussed, as are potential strategies to restore this key biological response and, along with it, the match of blood flow delivery with tissue energetic demand.
动脉张力在血管节段之间协调,以优化营养物质运输和器官功能。协调的血管舒缩活动是值得观察的,它依赖于组织中稀疏产生的刺激,这些刺激引发在电耦合的血管细胞中纵向传导的电响应。传导反应是本专题综述的重点,在这方面,作者强调了有助于理解功能意义、细胞机制和生物物理原理的文献。值得特别注意的是,本综述强调,传导是通过沿动脉壁的电荷移动的特定模式来实现的,这由三个关键参数(组织结构、缝隙连接电阻和离子通道活性)决定。还仔细讨论了疾病对传导的影响,以及恢复这种关键生物反应的潜在策略,以及随之而来的血液流动输送与组织能量需求的匹配。
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