查HCN通道阻塞剂对斑马鱼的睡眠/清醒行为的影响
Fusun Doldur-Balli1, Sandra P Smieszek2, Brendan T Keenan1
1Division of Sleep Medicine, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States.
Frontiers in neuroscience
|April 3, 2024
概括
在斑马鱼幼虫上测试了三种高极化激活循环核酸 (HCN) 通道阻断剂. 结果显示,伊瓦布拉丁,扎特布拉丁化物和ZD7288对睡眠延迟,白天活动和夜间睡眠时间产生影响.
科学领域:
- 神经科学是一个神经科学.
- 药理学 药理学是指药理学的学科.
背景情况:
- 超极化激活的循环核酸门 (HCN) 离子通道对于心脏,视网膜和大脑的电律性至关重要.
- 伊瓦布拉丁是一种FDA批准的HCN通道阻塞剂,通过抑制心房节活动来降低心率.
- 新出现的证据将HCN通道与睡眠-清醒周期的调节联系起来.
研究的目的:
- 为了研究三种HCN通道阻塞剂 (Ivabradine,Zatebradine 化物,ZD7288) 对斑马鱼幼虫的睡眠-觉醒行为的影响.
- 确定这些阻断剂对特定睡眠和活动参数的剂量依赖影响.
主要方法:
- 利用斑马鱼幼虫作为高通量行为表型化模型生物.
- 服用不同剂量的伊瓦布拉丁,扎特布拉丁化和ZD7288.8.
- 使用统计方法 (ANOVA) 分析睡眠延迟,白天活动和夜间睡眠时间.
主要成果:
- 伊瓦布拉丁 (0.1μM) 显著缩短了白天睡眠的延迟时间 (p=0.02).
- 扎特布拉丁化物 (30微米) 适度降低了平均白天活动 (p=0.024).
- ZD7288 (4.5μM) 增加了夜间睡眠时间 (p=0.036).
结论:
- 不同的HCN通道抗剂不同影响睡眠和活动的不同参数.
- 这些发现强调了HCN通道在调节睡眠等复杂行为中的作用.
- 斑马鱼幼虫作为一个有价值的模型来研究HCN通道调节器的行为药理学.
相关概念视频
Drugs Affecting Neurotransmitter Release or Uptake
Certain drugs can affect how neurotransmitters called catecholamines, are released or taken back up in the adrenergic neuron. They can have different effects on the body's sympathetic transmission. Reserpine, a natural compound found in the Rauwolfia shrub, blocks a transporter called vesicular monoamine transporter (VMAT), which leads to a buildup of catecholamines in the cell and reduces sympathetic transmission. Another drug called guanethidine works in multiple ways, including blocking...
CNS Depressants: Barbiturates and Benzodiazepines
CNS depressants include drugs from the category of barbiturates and benzodiazepines. They are valuable medications for managing anxiety disorders and insomnia. Barbiturates, once used to induce and maintain sleep, have been replaced mainly by benzodiazepines due to barbiturate's toxicity, tolerance, and overdose risks. They interact with GABAA receptors, leading to sedation at low doses and potentially coma and death at higher doses. Phenobarbital, a long-acting barbiturate, possesses...
Sedatives and Hypnotics: Overview
Sedatives are drugs that alleviate anxiety, while hypnotics induce sleep. Both classes of medication suppress neuronal activity, leading to a calming effect for sedatives and facilitating sleep for hypnotics.
Sedative-hypnotics are categorized into barbiturates, benzodiazepines (BZDs), and non-benzodiazepines or Z-drugs. These drugs work by suppressing central nervous system activity, and this suppression is dose-dependent. Older sedative medications, like barbiturates, follow a linear curve in...
Sedative-hypnotics are categorized into barbiturates, benzodiazepines (BZDs), and non-benzodiazepines or Z-drugs. These drugs work by suppressing central nervous system activity, and this suppression is dose-dependent. Older sedative medications, like barbiturates, follow a linear curve in...
Management of Insomnia
The sleep cycle, an integral part of human health, consists of several stages with distinct characteristics and functions. It begins with a transition from wakefulness to sleep, known as the light sleep phase, followed by the restorative deep sleep phase, essential for physical recovery and growth. The cycle concludes with the Rapid Eye Movement (REM) phase, characterized by high brain activity and vivid dreaming. Insomnia, a prevalent sleep disorder, involves difficulty falling asleep, staying...
Sedatives and Hypnotics Drugs: Miscellaneous Agents
Sedatives and hypnotics encompass a wide range of substances, each with its unique mechanism of action, uses, and potential adverse effects.
Melatonin congeners like ramelteon (Rozerem) and tasimelteon (Hetlioz) selectively bind to melatonin receptors (MT1 and MT2) and thus mimic the actions of melatonin, a hormone that regulates sleep-wake cycles. Tasimelteon is primarily used for non-24-hour sleep-wake disorder, common in blind patients. They are also used to treat conditions like insomnia...
Melatonin congeners like ramelteon (Rozerem) and tasimelteon (Hetlioz) selectively bind to melatonin receptors (MT1 and MT2) and thus mimic the actions of melatonin, a hormone that regulates sleep-wake cycles. Tasimelteon is primarily used for non-24-hour sleep-wake disorder, common in blind patients. They are also used to treat conditions like insomnia...
Acid Suppressive Drugs for Peptic Ulcer Disease: Histamine H2-Receptor Antagonists
Histamine H2 receptors, which are intricately located on the basolateral membrane of parietal cells, play a crucial role in modulating gastric acid secretion. When released from enterochromaffin-like cells, histamine engages H2 receptors, initiating the cyclic AMP (cAMP) pathway. In this pathway, adenylyl cyclase converts ATP into cAMP, elevating intracellular cAMP levels. The activation of protein kinase A follows, stimulating the proton pump. This stimulation prompts the secretion of hydrogen...


