西促进恐惧灭绝:剂量,环境和血清素受体的重要性
Samuel C Woodburn1, Caleb M Levitt1, Allison M Koester1
1Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York 14853, United States.
ACS chemical neuroscience
|August 1, 2024
概括
псилоцибин显著改善了小鼠的恐惧灭绝和保留,特别是在测试前给药时. 它的作用是剂量依赖的,由血清素受体介导,表明潜在的创伤后应激障碍治疗.
科学领域:
- 神经科学是一个神经科学.
- 心理药理学 心理药理学
- 行为科学 行为科学
背景情况:
- 经典的迷幻药物和MDMA在增强动物模型中的恐惧灭绝方面表现有希望.
- 长期暴露疗法是创伤后应激障碍 (PTSD) 的标准治疗方法.
- 西对恐惧学习模式的特定影响,包括剂量和受体参与,需要进一步调查.
研究的目的:
- 在小鼠中调查psilocybin对恐惧灭绝,灭绝保留和恐惧更新的影响.
- 为了确定psilocybin剂量,服用时间和血清素受体活性对恐惧灭绝的影响.
- 为了探索潜在的性别差异在应对psilocybin.
主要方法:
- 在雄性和雌性小鼠中利用了延迟恐惧调节范式.
- 在测试前,恐惧学习或灭绝后立即服用不同剂量的psilocybin.
- 使用特定的抗剂研究了5-HT2A和5-HT1A受体的作用.
主要成果:
- 在测试前给药时,psilocybin在所有测试剂量中强大增强了恐惧的灭绝.
- 长期影响包括增加灭绝保留和抑制恐惧更新,对剂量敏感.
- 同时的灭绝经验是 psilocybin 的行为效应所必需的; 时机至关重要.
- 观察到性别差异,女性可能对更窄的剂量范围做出反应.
- 5-HT2A受体对抗性阻断了psilocybin的作用,而5-HT1A对抗性只减弱了恐惧更新抑制.
结论:
- 松素以剂量取决的方式促进恐惧灭绝,灭绝保留和恐惧更新抑制.
- 血清激素受体,特别是5-HT2A受体,对于 псилоцибин对恐惧灭绝的影响至关重要.
- 临床前发现支持psilocybin作为与PTSD相关的灭绝治疗的潜在辅助疗法.
相关概念视频
Hallucinogens and Psychedelics
161
Hallucinogens are psychoactive substances that profoundly alter perceptual experiences, generating unreal visual and sensory images. Often referred to as psychedelic drugs — a term derived from the Greek words "psyche" (mind) and "delos" (revealing) — these substances include marijuana and lysergic acid diethylamide (LSD), among others. These drugs vary in intensity and effects.
Marijuana, derived from the dried leaves and flowers of the hemp plant, contains...
Marijuana, derived from the dried leaves and flowers of the hemp plant, contains...
161
Classical Conditioning in Daily Life
694
Classical conditioning, a fundamental principle of associative learning, explains various phenomena observed in daily life, such as fear development, the placebo effect, taste aversion, and drug habituation. These applications demonstrate the profound impact of associative learning on human behavior and physiological responses.
John B. Watson and Rosalie Rayner famously demonstrated the development of fear through classical conditioning in their experiment with Little Albert. They paired the...
John B. Watson and Rosalie Rayner famously demonstrated the development of fear through classical conditioning in their experiment with Little Albert. They paired the...
694
CNS Stimulants: Psychedelic Agents
134
Hallucinogens, also known as psychedelic drugs, are a class of substances known for their ability to alter perception, cognition, and emotions. Despite their profound effects on the mind, these drugs are non-addictive, setting them apart from many other abused substances. The mechanism of action of these drugs lies in their impact on the 5-HT2A receptor in the brain. Upon activation, this receptor couples to Gq-type G proteins, triggering a cascade that releases intracellular calcium. This...
134
Behavior Therapy
45
Behavior therapy incorporates diverse techniques rooted in classical conditioning principles to address maladaptive behaviors and anxiety disorders. These methods aim to reduce avoidance behaviors, foster adaptive coping mechanisms, and alter associations between stimuli and responses, making them effective in a wide range of therapeutic contexts.
Exposure therapy is a cornerstone of behavioral treatment for anxiety disorders. It involves systematic exposure to feared stimuli, either in real...
Exposure therapy is a cornerstone of behavioral treatment for anxiety disorders. It involves systematic exposure to feared stimuli, either in real...
45
Desensitization and Tachyphylaxis
1.6K
Tachyphylaxis is described as a rapid decrease in response to a drug after repeated or continuous administration of the same drug dose. It is a phenomenon where the body becomes less responsive to a particular substance or intervention over time, requiring higher doses or stronger interventions to achieve the same effect. It results from adaptive changes in the body's receptors, signaling pathways, or physiological processes that occur in response to prolonged exposure to a stimulus.
1.6K
Preparedness and Phobias
98
Human fear responses to certain stimuli, such as darkness, heights, deep water, and blood, can often arise despite the absence of direct negative experiences. This phenomenon is rooted in evolutionary psychology, which posits that humans have developed a predisposition to fear stimuli that historically posed significant survival threats. This predisposition, known as preparedness, suggests that early humans who developed a fear of potentially dangerous entities, such as venomous snakes and...
98


