准黑色皮质素4受体治疗小鼠睡眠呼吸障碍
Mateus R Amorim1, Noah R Williams1, O Aung2
1Department of Anesthesiology and Critical Care Medicine, George Washington University, Washington, United States of America.
The Journal of clinical investigation
|April 15, 2025
概括
塞特梅拉诺提德是一种黑色皮质素受体4激动剂,通过改善通风和减少呼吸暂停,有效地治疗肥胖小鼠的睡眠呼吸障碍. 这种减肥药物向特定的脑干神经元,这些神经元参与呼吸控制.
科学领域:
- 神经科学是一个神经科学.
- 呼吸系统生理学 呼吸系统生理学
- 药理学 药理学是指药理学的学科.
背景情况:
- 睡眠呼吸障碍 (SDB) 越来越令人担忧,新兴的研究正在探索减肥药物用于其治疗.
- 梅拉诺科丁受体4 (MC4R) 激动剂,如setmelanotide,已被批准用于与特定遗传信号缺陷相关的肥胖症.
研究的目的:
- 研究setmelanotide (SET) 在治疗小鼠饮食诱导的肥胖相关的SDB中的疗效.
- 阐明SET对呼吸控制的影响背后的神经机制.
主要方法:
- 随机交叉试验比较饮食诱导的肥胖小鼠中的SET和车辆.
- 评估通风,高呼吸器反应 (HCVR) 和睡眠期间的呼吸暂停.
- 对MC4RmRNA与呼吸神经元标记物 (Phox2b,neuromedin-B) 的同定位进行脑干分析.
- 在肥胖的Mc4r-Cre小鼠中,对表达MC4R的神经元进行化学遗传学操纵和有针对性的神经元切除.
主要成果:
- 在睡眠和清醒状态之间,SET显著增加了分钟通风,并消除了睡眠呼吸暂停.
- SET 增强了高卡普尼呼吸器反应 (HCVR).
- 在Phox2b+神经元中确定了MC4R的表达,这些神经元位于孤独管 (NTS) 和面膜区域的细胞核内.
- 副面MC4R+神经元的化学遗传激活增强了HCVR,而它们的切除取消了SET对HCVR的影响.
- 副面部MC4R+神经元向呼吸前运动神经元发射.
结论:
- 梅拉诺科丁受体4激动剂,如setmelanotide,代表了睡眠呼吸障碍的有希望的药物治疗方法.
- SET对SDB的治疗效果是通过面周呼吸组的MC4R+神经元进行介导的,增强了超管呼吸反应.
相关概念视频
01:19Management of Insomnia
237
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...
237
01:17Sedatives and Hypnotics Drugs: Miscellaneous Agents
163
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...
163