Morphine coordinates SST and PV interneurons in the prelimbic cortex to disinhibit pyramidal neurons and enhance reward.

Morphine coordinates SST and PV interneurons in the prelimbic cortex to disinhibit pyramidal neurons and enhance reward.
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吗啡协调前边缘皮质中的 SST 和 PV 中间神经元,以抑制锥体神经元并增强奖赏

DOI:
10.1038/s41380-019-0480-7
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发表时间:
2021-04
影响因子:
11
通讯作者:
Ma L
Ma L
中科院分区:
医学1区
文献类型:
--
作者:
Jiang C;Wang X;Le Q;Liu P;Liu C;Wang Z;He G;Zheng P;Wang F;Ma L

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阿片类药物,如吗啡,是一种引起欣快感的临床镇痛药。吗啡暴露改变神经元之间的兴奋性和功能相互作用,而潜在的细胞和分子机制,特别是吗啡如何组装异质性interneurons(IN)在前边缘皮层(PrL)介导的去抑制和奖励,是不清楚的。我们利用光遗传学、电生理学和细胞类型特异性RNA-seq等方法,研究表明吗啡可减弱小白蛋白+(PV)-INs通过PV-INs上的μ-阿片受体(莫尔)对PrL锥体神经元的抑制性突触传递,同时增强生长抑素+(SST)-INs对PV-INs的抑制性突触传递,因此通过δ-阿片受体(DOR)依赖性Rac 1在SST-INs中的上调来解除锥体神经元的抑制。我们表明PV-INs中的莫尔是吗啡诱导的行为敏化所必需的,而SST-INs中的DOR和Rac 1活性是吗啡诱导的条件性位置偏爱和过度运动所必需的。这些结果表明,SST-和PV-INs,功能在PrL作为一个去抑制架构,协调吗啡通过不同的阿片受体去抑制锥体神经元和增强奖励。
Opioids, such as morphine, are clinic analgesics which induce euphoria. Morphine exposure modifies the excitability and functional interactions between neurons, while the underlying cellular and molecular mechanisms, especially how morphine assembles heterogeneous interneurons (INs) in prelimbic cortex (PrL) to mediate disinhibition and reward, are not clear. Using approaches of optogenetics, electrophysiology, and cell type-specific RNA-seq, we show that morphine attenuates the inhibitory synaptic transmission from parvalbumin+(PV)-INs onto pyramidal neurons in PrL via μ-opioid receptor (MOR) in PV-INs. Meanwhile, morphine enhances the inhibitory inputs from somatostatin+(SST)-INs onto PV-INs, and thus disinhibits pyramidal neurons via δ-opioid receptor (DOR)-dependent Rac1 upregulation in SST-INs. We show that MOR in PV-INs is required for morphine-induced behavioral sensitization, while DOR as well as Rac1 activity in SST-INs is required for morphine-induced conditioned place preference and hyper-locomotion. These results reveal that SST- and PV-INs, functioning in PrL as a disinhibitory architecture, are coordinated by morphine via different opioid receptors to disinhibit pyramidal neurons and enhance reward.
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