Amygdala-dependent fear memory consolidation via miR-34a and Notch signaling.

Amygdala-dependent fear memory consolidation via miR-34a and Notch signaling.
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DOI:
10.1016/j.neuron.2014.07.019
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发表时间:
2014-08-20
期刊:
影响因子:
16.2
通讯作者:
Ressler, Kerry James
Ressler, Kerry James
中科院分区:
医学1区
文献类型:
--
作者:
Dias, Brian George;Goodman, Jared Vega;Ahluwalia, Ranbir;Easton, Audrey Elizabeth;Andero, Rauel;Ressler, Kerry James

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在听觉恐惧条件反射和microRNA(miRNA)海绵介导的抑制后,使用基于阵列的方法,我们确定了基底外侧杏仁核(BLA)内miR-34 a在恐惧记忆巩固中的作用。荧光素酶测定和生物信息学表明Notch途径是miR-34 a的靶点。Notch受体和配体的mRNA和蛋白水平在杏仁核恐惧条件反射后以时间和学习特异性方式下调。对Notch通路的系统和立体定位操作表明,BLA中的Notch信号传导抑制恐惧记忆巩固。在BLA内抑制miR-34 a后,通过抑制Notch信号传导来挽救恐惧记忆巩固的损害。总之,这些数据表明,在BLA内,通过miR-34 a调节的Notch信号转导的短暂减少对于巩固恐惧记忆是重要的。这项工作扩展了发育分子在成人行为中发挥作用的观点,并且针对它们的现有干预措施有望治疗神经精神疾病。
Using an array-based approach after auditory fear-conditioning, and microRNA (miRNA) sponge-mediated inhibition, we identified a role for miR-34a within the basolateral amygdala (BLA) in fear memory consolidation. Luciferase assays and bioinformatics suggested the Notch pathway as a target of miR-34a. mRNA and protein levels of Notch receptors and ligands are down-regulated in a time- and learning-specific manner after fear conditioning in the amygdala. Systemic and stereotaxic manipulations of the Notch pathway indicated that Notch signaling in the BLA suppresses fear memory consolidation. Impairment of fear memory consolidation after inhibition of miR-34a within the BLA is rescued by inhibiting Notch signaling. Together, these data suggest that within the BLA, a transient decrease in Notch signaling, via miR-34a regulation, is important for the consolidation of fear memory. This work expands the idea that developmental molecules have roles in adult behavior, and that existing interventions targeting them hold promise for treating neuropsychiatric disorders.
在大鼠和人类中持续的恐惧:恐惧与焦虑中的杏仁核的作用。
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