NAT COMMUN:记忆是怎么被巩固的? 

2020-12-18 haibei MedSci原创

研究人员在Nature Communications杂志发文表明,通过恐惧条件的记忆形成选择性地加速了小脑内大麻素的降解。学习诱导了GABA释放的持久增加,这是驱动内啡肽降解变化的原因。

神经调节剂既控制着神经元的突触传递,又控制着神经元的内在兴奋性,其功能失调可导致神经系统疾病。它们的丰度受生产和降解之间的微妙平衡控制。虽然通常的假设是神经活动促进神经调节剂的产生以影响信号传递,但快速的化学降解过程可能控制神经调节剂作用的时间曲线,以优化神经元电路内的信息处理。

因此在理论上,降解速率的变化会影响神经调节剂的信号传导,但这种可塑性形式是否存在尚未确定。

已有的研究显示,内大麻素逆行调节突触传递,其丰度受内大麻素合成和降解之间的微妙平衡控制。虽然常见的假设是,"按需 "释放决定内大麻素的信号传导,但它们的快速降解有望控制内大麻素作用的时间曲线,并可能影响神经元信号传导。

最近,研究人员在Nature Communications杂志发文表明,通过恐惧条件的记忆形成选择性地加速了小脑内大麻素的降解。学习诱导了GABA释放的持久增加,这是驱动内啡肽降解变化的原因

相反,Gq-DREADD对小脑浦肯野细胞的激活增强了内大麻素信号,损害了记忆巩固。

因此,该研究结果确定了GABA和内大麻素系统之间一个以前未被重视的相互作用,其中GABA信号加速了内大麻素的降解,并引发了一种学习诱导的可塑性

 

原始出处:

Christophe J. Dubois et al. Inhibitory neurotransmission drives endocannabinoid degradation to promote memory consolidation. NATURE COMMUNICATIONS (2020). 

 

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    2021-05-25 liuli5079
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    2021-01-03 liye789132251
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    2020-12-22 Jessica

    GABA信号加速了内**素的降解,并引发了一种学习诱导的可塑性。

    0

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    2020-12-19 三生有幸9135

    GABA信号加速了内**素的降解,并引发了一种学习诱导的可塑性

    0

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    2020-12-18 水-晶

    每天来学习。

    0

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