米菲普里斯降低了依赖和非依赖成年大鼠的尼古丁摄入量
Ranjithkumar Chellian1, Azin Behnood-Rod1, Adriaan W Bruijnzeel1
1Department of Psychiatry, University of Florida, Gainesville, FL, USA.
Journal of psychopharmacology (Oxford, England)
|February 9, 2024
概括
用mifepristone阻断葡萄糖皮质体受体减少了老鼠的尼古丁摄入量. 然而,这种效果可能是由于米费普里斯的镇静性质,而不仅仅是它对尼古丁强化的影响.
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.
- 成研究 研究成研究
背景情况:
- 烟草和尼古丁成对全球健康构成重大挑战,需要新的治疗策略.
- 葡萄糖皮质醇受体阻断是治疗药物滥用和与压力有关的疾病的有希望的途径.
研究的目的:
- 为了评估mifepristone的疗效,一个葡萄糖皮质体受体阻断剂,在减少尼古丁的强化作用.
- 这项研究调查了不同接触模式 (间歇或每日) 的老鼠的尼古丁摄入量,以模拟不同的吸烟行为.
主要方法:
- 在日常或间歇性访问条件下,老鼠自给自用尼古丁4周.
- 尼古丁依赖的评估是使用尼古丁乙胆受体对抗剂mecamylamine进行的.
- 测量了米费普里斯对尼古丁摄入量和一般活性的影响 (开放场地试验,操作人员响应).
主要成果:
- 每天接触尼古丁的老鼠表现出身体依赖,与偶尔接触尼古丁的老鼠不同.
- 在每日和间歇接触组中,米费普里斯显著降低了整体尼古丁摄入量.
- 米菲普里斯还降低了运动活动和寻找食物的行为,这表明了潜在的镇静作用.
结论:
- 在动物模型中,米费普里斯显示出降低尼古丁消耗的能力.
- 观察到的尼古丁摄入量减少可能部分归因于米费普里斯的镇静作用,因此需要进一步调查其特定的作用机制.
相关概念视频
Drugs Acting on Autonomic Ganglia: Stimulants
1.3K
Ganglionic stimulants activate NM nicotinic receptors in autonomic ganglia, falling into two categories: nicotine mimetics [e.g., lobeline, dimethylpiperazine, tetramethylammonium] and muscarinic receptor agonists [e.g., muscarine, methacholine]. The first category's action is rapid and blocked by nicotinic receptor antagonists, while the second category's action is delayed and blocked by atropine-like agents. Nicotine, an alkaloid, affects the heart rate by stimulating...
1.3K
Drug Dependence
1.0K
Medications are typically administered to achieve therapeutic effects. Some drugs can modify an individual's mood and perception, frequently resulting in various enjoyable experiences. However, this can result in drug dependency, a condition marked by continuous drug use despite potential negative consequences. Drug dependency primarily falls into two categories: psychological and physical dependence. Psychological dependence occurs when the pleasurable feelings induced by the drug...
1.0K
CNS Depressants: Alcohol and Nicotine
209
Ethanol, a clear colorless alcohol, has been consumed by humans for millennia, but its effects on the body are far from benign. At lower doses, it induces decreased inhibitions and loquaciousness, leading to its social appeal. However, it can cause severe consequences at higher doses, such as coma and respiratory depression, due to its zero-order elimination kinetics. Chronic ethanol abuse wreaks havoc on multiple organ systems, particularly the CNS and the liver. Abrupt cessation of ethanol...
209


