吗啡素 (NH4-tyr-pro-phe-pro-COHN2):一种对吗啡 (mu) 受体的强效和特异性激动剂
概括
甲基素 (morphiceptin) 是β-素中的一种,它专门作用于吗啡 (mu) 受体,而不是三角体受体. 这一发现支持多个阿片类受体的存在,并为亚型研究提供了一个工具.
科学领域:
- 药理学 药理学 是一个学科.
- 神经科学是一个神经科学.
- 生物化学 生物化学
背景情况:
- 片受体在疼痛调节和其他生理过程中至关重要.
- 假设存在多种阿片类受体亚型 (mu,delta,kappa).
- 目前正在积极研究这些受体的内源性配体.
研究的目的:
- 为了描述合成Morphiceptin的受体结合和活性概况.
- 调查morphiceptin或来自β-casein的类似的潜在生理作用.
- 为探索片受体的功能提供一种特定的配体.
主要方法:
- 合成的形素 (NH2-Tyr-Pro-Phe-Pro-CONH2) 的合成.
- 在实验室生物测试中,使用了几内亚猪皮质和老鼠/老鼠 vas deferens 制剂.
- 受体结合研究以确定Mu和delta阿片类受体的特异性.
主要成果:
- 吗啡素表现出类似吗啡的活性.
- 该对类受体具有高度选择性,在类受体上表现出最小的活性.
- 吗菲塞丁的功效与几内亚猪内中的吗啡相当,但在动物的分泌管中显著下降.
结论:
- 发现了选择性mu-opioid受体连接体的morphiceptin,为多重阿片类受体假设提供了有力的证据.
- 莫菲塞丁可能是来自β-氨酸的内源性连接体,这表明它在生理学上起着作用.
- 这种特定的配体是进一步研究片受体亚型的独特功能的一个有价值的工具.
更多相关视频
07:05Operant Protocols for Assessing the Cost-benefit Analysis During Reinforced Decision Making by Rodents
Published on: September 10, 2018
16:02Demonstration of the Sequence Alignment to Predict Across Species Susceptibility Tool for Rapid Assessment of Protein Conservation
Published on: February 10, 2023
相关概念视频
Drug-Receptor Interaction: Agonist
Agonists are drugs that interact with specific receptors in the body to produce a biological response. When an agonist binds to a receptor, it activates or enhances the receptor's function, leading to physiological effects. The interaction between agonist drugs and receptors is crucial for their therapeutic action in various medical treatments.
Agonists can bind to receptors in different ways. Some agonists bind directly to the receptor's active site, mimicking the endogenous ligand's action.
Agonists can bind to receptors in different ways. Some agonists bind directly to the receptor's active site, mimicking the endogenous ligand's action.
Adrenergic Agonists: Chemistry and Structure-Activity Relationship
Adrenergic agonists' structure-activity relationship (SAR) determines their selectivity and efficacy. These agonists comprise a phenylethylamine moiety with an aromatic ring and an ethylamine side chain.
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of the aromatic...
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of the aromatic...
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, D-Pen5]-enkephalin or DPDPE for...
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...
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...
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...
