相关实验视频

Updated: Jul 16, 2025

Assessment of Morphine-induced Hyperalgesia and Analgesic Tolerance in Mice Using Thermal and Mechanical Nociceptive Modalities

Assessment of Morphine-induced Hyperalgesia and Analgesic Tolerance in Mice Using Thermal and Mechanical Nociceptive Modalities

Published on: July 29, 2014

一个胆固醇电路,尽管耐受阿片类药物,但可以缓解疼痛

Shivang Sullere¹, Alissa Kunczt², Daniel S McGehee³

¹Committee on Neurobiology, University of Chicago, Chicago, IL 60637, USA.

|September 21, 2023

概括

新的研究表明,激活涉及乙胆的特定大脑通路可以有效地缓解慢性疼痛,即使在阿片类药物耐受性个体. 这提供了一个有希望的替代性疼痛管理策略,没有常见的阿片类药物副作用.

科学领域:

神经科学是一个神经科学.
疼痛管理疼痛管理
胆固醇信号传递胆固醇信号

背景情况:

慢性疼痛是一个重大的全球健康挑战.
阿片类药物提供疼痛缓解,但由于副作用和耐受性而存在局限性.
其他疼痛调节途径需要调查.

研究的目的:

探索胆固醇信号在腹侧周水管灰色 (vlPAG) 中的作用,以控制疼痛.
研究新的非阿片类药物止痛机制.

主要方法:

使用生物传感器测试来测量vlPAG中的乙胆释放.
研究了激活胆性投射的效果,从pedunculopontine tegmentum到vlPAG.
在体内使用2光子成像来评估神经元活动和慢性疼痛影响.
研究了α7尼古丁性乙胆受体 (α7 nAChRs) 和过氧体增殖器激活受体α (PPARα) 的作用.

主要成果:

疼痛状态与vlPAG中乙胆释放的减少有关.
通过α7 nAChRs激活vlPAG胆固醇投射,缓解疼痛,包括在阿片类药物耐受性模型中,通过α7 nAChRs.
α7 nAChR激活通过Ca2+和PPARα依赖途径抑制了vlPAG神经元活动.
慢性疼痛诱导异常的vlPAG神经刺激性,由α7 nAChR介导的抑制逆转.

结论:

在vlPAG中的胆固醇信号传递是关键的下降疼痛调节途径.
针对vlPAG中的α7 nAChR提供了一种潜在的非成性慢性疼痛管理策略.
这种机制可以缓解疼痛,没有相关的耐受性,奖励或戒断,这表明临床潜力.

关键词:

乙烯基胆是一种亚洛迪尼亚 (allodynia) 是一种全气体的现象.止痛药止痛药止痛药是一种止痛药.过高气质症是一种超高气质症.这是一种炎症炎症炎症炎症.这是吗啡吗啡.肌肉性肌肉性肌肉性肌肉性肌肉这是一种神经病的精神病.尼古丁酸尼古丁酸的使用方法这就是VlPAG的VlPAG.

更多相关视频

The Sciatic Nerve Cuffing Model of Neuropathic Pain in Mice

The Sciatic Nerve Cuffing Model of Neuropathic Pain in Mice

Published on: July 16, 2014

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache

Published on: June 2, 2014

相关概念视频

Analgesia and Pain Management

Analgesia and Pain Management

Pain is critical to various clinical pathologies, provoking an urgent need for effective management. Pain, whether acute or chronic, is a complex neurochemical process. Its alleviation depends on the type, with nonopioid analgesics effective for mild to moderate pain, such as musculoskeletal or inflammatory pain, while neuropathic pain responds best to anticonvulsants, tricyclic antidepressants, or serotonin/norepinephrine reuptake inhibitors. For severe acute or chronic pain, opioids may be...

Pain

Pain

Pain serves as a critical warning signal that alerts the body to potential or actual harm. When mechanical pressure on the skin is intense, such as from a sharp pinch, the sensation transitions from touch to pain. Similarly, extreme temperatures, like a hot pot handle, convert the sensation of heat into pain. Pain can also result from overstimulation of other senses, such as blinding light, loud noise, or the intense heat from habañero peppers. This ability to sense pain is essential for...

Opioid Analgesics: Synthetic and Semisynthetic Opioids

Opioid Analgesics: Synthetic and Semisynthetic Opioids

Synthetic and semisynthetic opioids are pivotal in pain management and tackling opioid addiction. Semisynthetic opioids, including morphinans (morphine derivatives), oxycodone, oxymorphone, hydrocodone, and hydromorphone, have improved pharmacokinetic profiles compared to morphine. Additionally, heroin and 6-MAM (6-Monoacetylmorphine) show better CNS penetration than morphine due to heightened lipid solubility. Hydromorphone, a potent opioid, undergoes hepatic metabolism to form the active...

Opioid Receptors: Overview

Opioid Receptors: Overview

Opioid receptors, including the mu (μ, MOR), delta (δ, DOR), and kappa (κ, KOR) types, belong to the rhodopsin family of G protein-coupled receptors. These receptors are located throughout the central and peripheral nervous systems and in non-neuronal tissues such as macrophages and astrocytes. Opioid receptor ligands can be categorized into agonists or antagonists. Highly selective agonists include [d-Ala2, MePhe4, Gly(ol)5]-enkephalin or DAMGO for MOR, [D-Pen2,...

Opioid Analgesics: Morphine and Other Natural Cogeners

Opioid Analgesics: Morphine and Other Natural Cogeners

Opioids are a class of drugs that mimic endogenous opioid peptides and act on opioid receptors, and help in pain relief. These compounds are classified as natural, synthetic, or semi-synthetic. Natural opioids, like morphine, codeine, and thebaine, are derived from the opium poppy plant (Papaver somniferum or Papaver album) and are termed opiates. Synthetic opioids are artificial, while semi-synthetic opioids combine natural and synthetic compounds. Morphine, a prototypical opioid, possesses a...

Nociception

Nociception

Nociception—the ability to feel pain—is essential for an organism’s survival and overall well-being. Noxious stimuli such as piercing pain from a sharp object, heat from an open flame, or contact with corrosive chemicals are first detected by sensory receptors, called nociceptors, located on nerve endings. Nociceptors express ion channels that convert noxious stimuli into electrical signals. When these signals reach the brain via sensory neurons, they are perceived as pain.