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一种皮质-杏仁体神经基质,用于内分泌大麻素调节恐惧灭绝

Ozge Gunduz-Cinar¹, Laura I Castillo¹, Maya Xia¹

¹Laboratory of Behavioral and Genomic Neuroscience, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, MD 20892, USA.

|July 22, 2023

概括

内分泌大麻素 (eCBs) 通过作用于特定的大脑电路来调节恐惧灭绝. 这项研究揭示了中间前额叶皮层 (mPFC) 到底侧杏仁体 (BLA) 途径中的eCB如何对恐惧记忆灭绝至关重要.

科学领域:

神经科学是一个神经科学.
分子生物学分子生物学
行为科学行为科学

背景情况:

内分泌大麻素 (eCBs) 涉及到恐惧灭绝过程.
在恐惧灭绝中调解eCB行动的精确神经回路仍然在很大程度上是未知的.

研究的目的:

调查向底侧杏仁体 (BLA) 投射的中部前额叶皮层 (mPFC) 神经元在eCB介导的恐惧灭绝中的作用.
阐明在恐惧灭绝学习过程中eCBs的神经电路基础和时间动态.

主要方法:

在体内光遗传学来操纵神经元活动.
内分泌大麻素 (eCB) 生物传感器成像以跟踪eCB动态.
实体电生理学来评估突触功能.
为了研究受体参与,CRISPR-Cas9基因编辑.

主要成果:

在灭绝学习期间,BLA中mPFC轴突的光激发动员了BLAeCBs.
在mPFC→BLA神经元中,eCB活动显示了特定刺激的模式,跟踪了灭绝学习.
通过CRISPR-Cas9调解的基因编辑证实了vmPFC→BLA突触中的大麻素CB1受体的eCB活性,这对灭绝记忆至关重要.

结论:

这项研究确定了mPFC→BLA神经回路作为eCB调节恐惧灭绝的关键基质.
研究结果揭示了eCBs在灭绝学习过程中的动态,刺激特定的时间模式.
这些结果为针对eCB系统的治疗策略提供了基础,用于灭绝缺陷的神经精神疾病.

关键词:

克里斯普尔-Cas9是什么意思 GRAB(eCB2.0) 生物传感器生物传感器创伤后应激障碍 (PTSD) 是一种阿米格达拉的桃体焦虑是一种焦虑.这是一种内分泌大麻素 (endocannabinoid).灭绝的灭绝是一种灭绝.恐惧恐惧恐惧恐惧视觉遗传学视觉遗传学前额叶皮层前额叶皮层.

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