相关实验视频

Updated: Jul 16, 2026

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

在多巴胺缺乏小鼠的吗啡奖励

Thomas S Hnasko¹, Bethany N Sotak, Richard D Palmiter

¹Graduate Program in Neurobiology & Behavior, University of Washington, Seattle, Washington 98195, USA.

|December 13, 2005

概括

多巴胺对于吗啡诱导的运动是必不可少的,可能会影响止痛,但对于吗啡奖励来说并不需要. 这项研究使用多巴胺缺乏的小鼠来研究阿片类药物反应.

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.
行为科学行为科学

背景情况:

多巴胺是调解滥用药物的行为反应的关键神经递质.
多巴胺在阿片类药物诱导作用中的作用,特别是奖励和止痛,需要进一步阐明.

研究的目的:

调查多巴胺在调解吗啡诱导的运动运动活动,止痛和奖励方面的必要性.
测试多巴胺是阿片类药物诱导反应的重要调解剂的假设.

主要方法:

将吗啡给基因工程小鼠,使它们无法合成多巴胺.
评估运动运动活动,尾部动延迟 (疼痛敏感性) 和有条件的位置偏好.
在测试期间使用咖啡因或l-dihydroxyphenylalanine来调节多巴胺水平.

主要成果:

多巴胺缺乏的小鼠对吗啡的运动反应显著降低.
在多巴胺缺乏小鼠中观察到对吗啡止痛剂量反应曲线向右转移.
当多巴胺在测试期间恢复时,多巴胺缺乏的小鼠表现出对吗啡的强有力的条件偏好.

结论:

多巴胺是吗啡诱导运动的关键媒介.
多巴胺可能在吗啡镇痛中发挥作用,缺乏可能导致过敏镇痛.
多巴胺对于获得吗啡诱导的奖励来说并不必不可少,这可以通过有条件的位置偏好来衡量.

更多相关视频

Operant Protocols for Assessing the Cost-benefit Analysis During Reinforced Decision Making by Rodents

Operant Protocols for Assessing the Cost-benefit Analysis During Reinforced Decision Making by Rodents

Published on: September 10, 2018

A Conditioned Place Preference Protocol for Measuring Incubation of Craving in Rats

A Conditioned Place Preference Protocol for Measuring Incubation of Craving in Rats

Published on: November 6, 2018

相关概念视频

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, D-Pen5]-enkephalin or DPDPE 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...