当前位置: X-MOL 学术ACS Chem. Neurosci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Microdialysis Unveils the Role of the α2-Adrenergic System in the Basolateral Amygdala during Acquisition of Conditioned Odor Aversion in the Rat.
ACS Chemical Neuroscience ( IF 4.1 ) Pub Date : 2018-09-10 , DOI: 10.1021/acschemneuro.8b00314
Lucile Estrade 1 , Jean-Christophe Cassel 2 , Sandrine Parrot 3 , Patricia Duchamp-Viret 1 , Barbara Ferry 1
Affiliation  

Previous work has shown that β-adrenergic and GABAergic systems in the basolateral amygdala (BLA) are involved in the acquisition of conditioned odor aversion (COA) learning. The involvement of α2-adrenoreceptors, however, is poorly documented. In a first experiment, male Long-Evans rats received infusions of 0.1 μg of the selective α2-antagonist dexefaroxan (Dex) in the BLA before being exposed to COA learning. In a second experiment, levels of norepinephrine (NE) were analyzed following Dex retrodialysis into the BLA. While microdialysis data showed a significant enhancement of NE release in the BLA with Dex, behavioral results showed that pre-CS infusion of Dex impaired, rather than facilitated, the acquisition of COA. Our results show that the NE system in the BLA is involved in the acquisition of COA, including a strong α2-receptor modulation until now unsuspected. Supported by the recent literature, the present data suggest moreover that the processes underlying this learning are probably mediated by the balanced effects of NE excitatory/inhibitory signaling in the BLA, in which interneurons are highly involved.

中文翻译:

微透析揭示了大鼠条件性厌恶获取过程中α2-肾上腺素系统在基底外侧杏仁核中的作用。

先前的研究表明,基底外侧杏仁核(BLA)中的β-肾上腺素能和GABA能系统参与了条件性厌恶(COA)学习的获得。但是,α2-肾上腺素受体的参与文献很少。在第一个实验中,雄性Long-Evans大鼠在接受COA学习之前,在BLA中接受了0.1μg选择性α2-拮抗剂Dexfaroxan(Dex)的输注。在第二个实验中,右旋右渗入BLA后分析了去甲肾上腺素(NE)的水平。尽管微透析数据显示,Dex可以显着增强BLA中NE的释放,但行为结果表明,CS前注入Dex会损害而不是促进COA的获取。我们的结果表明,BLA中的NE系统参与了COA的获取,直到现在都没有人怀疑它具有很强的α2受体调制能力。此外,在最新文献的支持下,本数据还表明,这种学习的基础可能是由BLA中NE兴奋性/抑制性信号传导的平衡作用介导的,其中Bneu参与其中。
更新日期:2018-09-04
down
wechat
bug