オピオイド受容体密輸とモルヒン耐性の規制は,受容体オリゴメリゼーションによるものです
Li He1, Jamie Fong, Mark von Zastrow
1Ernest Gallo Clinic and Research Center, University of California San Francisco, Emeryville, CA 94608, USA.
Cell
|February 8, 2002
まとめ
慢性疼痛管理における課題であるモルヒン耐性を減らすことができます. モルヒネとDAMGOを併用すると,ミュオピオイド受容体 (MOR) の内細胞化が促進され,ネズミの鎮痛剤耐性が著しく低下します.
科学分野:
- 薬理学 薬理学とは
- 神経科学は神経科学である.
- 疼痛管理 疼痛管理
背景:
- 慢性疼痛の治療は,モルヒンの耐性によって制限されます.
- モルフィンはムオピオイド受容体 (MOR) を活性化させ,無感化や内細胞化を促さない.
- 鎮痛剤耐性を克服するための戦略を開発することは,効果的な疼痛管理に不可欠です.
研究 の 目的:
- DAMGOがモルヒネによって誘発されるMOR内分細胞化を促進できるかどうかを調査する.
- モルヒネとDAMGOの併用が鎮痛剤耐性を低下させるかどうかを判断する.
- 慢性疼痛の治療標的として,MOR内分細胞症の可能性を調査する.
主な方法:
- MORをターゲットにするために[D-Ala(2)-MePhe(4)-Gly(5)-ol]エンケファリン (DAMGO) を利用しました.
- 慢性治療のためにネズミにモルヒネとDAMGOを投与した.
- 薬剤の有効性を時間とともに比較することによって,鎮痛剤耐性を評価した.
主要な成果:
- DAMGOは,モルヒン誘発のMOR内分細胞化を促進した.
- モルヒネとDAMGOの両方を投与されたラットは,モルヒネのみの治療と比較して,鎮痛剤耐性が低下した.
- MORエンドサイトーシスは,鎮痛剤耐性の発達を緩和することが示されました.
結論:
- MORエンドサイトーシスは,オピオイド鎮痛剤の耐性を減らすための有効なメカニズムです.
- モルヒネとMOR内部化剤の併用は,慢性疼痛治療の改善のための潜在的な戦略を提供します.
- この研究は,持続的な鎮痛効果を持つ新しいオピオイドアナログの開発への道を開く.
さらに関連する動画
関連する概念動画
GPCR Desensitization
6.1K
G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...
6.1K
The Two-State Receptor Model
3.5K
The two-state receptor model explains a drug's interaction with receptors, such as G protein-coupled receptors and ligand-gated ion channels, to induce or inhibit a biological response. When no natural ligands are present, a receptor exists in an equilibrium of inactive (Ri) and active (Ra) conformations. The inactive form does not produce a response, while the active form generates a basal effect known as constitutive activity.
The binding affinity of a drug determines its interaction with...
The binding affinity of a drug determines its interaction with...
3.5K
Opioid Receptors: Overview
7.2K
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,...
7.2K
Analgesia and Pain Management
3.3K
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...
3.3K
Opioid Analgesics: Morphine and Other Natural Cogeners
1.7K
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...
1.7K
Opioid Analgesics: Synthetic and Semisynthetic Opioids
1.5K
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...
1.5K


