Adenosine-to-Inosine RNA Editing Within Corticolimbic Brain Regions Is Regulated in Response to Chronic Social Defeat Stress in Mice

被引:12
作者
Dick, Alec L. W. [1 ]
Khermesh, Khen [2 ]
Paul, Evan [1 ]
Stamp, Fabian [1 ]
Levanon, Erez Y. [3 ]
Chen, Alon [1 ,4 ]
机构
[1] Max Planck Inst Psychiat, Dept Stress Neurobiol & Neurogenet, Munich, Germany
[2] CytoReason, Tel Aviv, Israel
[3] Bar Ilan Univ, Mina & Everard Goodman Fac Life Sci, Ramat Gan, Israel
[4] Weizmann Inst Sci, Dept Neurobiol, Rehovot, Israel
基金
欧洲研究理事会; 以色列科学基金会;
关键词
A-to-I RNA editing; chronic social defeat stress; microfluidics-based multiplex polymerase chain reaction; adenosine deaminases acting on RNA; ADAR; chronic stress; MEDIAL PREFRONTAL CORTEX; PRE-MESSENGER-RNA; PHARMACOLOGICAL INHIBITION; RECEPTOR; EXPRESSION; RESILIENCE; AMYGDALA; PCR;
D O I
10.3389/fpsyt.2019.00277
中图分类号
R749 [精神病学];
学科分类号
100205 ;
摘要
Adenosine-to-inosine (A-to-I) RNA editing is a co-/posttranscriptional modification of double-stranded RNA, catalyzed by the adenosine deaminase acting on RNA (ADAR) family of enzymes, which results in recognition of inosine as guanosine by translational and splicing machinery causing potential recoding events in amino acid sequences. A-to-I editing is prominent within brain-specific transcripts, and dysregulation of editing at several well-studied loci (e.g., Gria2, Htr2c) has been implicated in acute and chronic stress in rodents as well as neurological (e.g., Alzheimer's) and psychopathological disorders such as schizophrenia and major depressive disorder. However, only a small fraction of recoding sites has been investigated within the brain following stress, and our understanding of the role of RNA editing in transcriptome regulation following environmental stimuli remains poorly understood. Thus, we aimed to investigate A-to-I editing at hundreds of loci following chronic social defeat stress (CSDS) in nice within corticolimbic regions responsive to chronic stress regulation. Adult male mice were subjected to CSDS or control conditions for 21 days and dynamic regulation of A-to-I editing was investigated 2 and 8 days following the final defeat within both the medial prefrontal cortex (mPFC) and basolateral amygdala (BLA). Employing a targeted resequencing approach, which utilizes microfluicics-based multiplex polymerase chain reaction (PCR) coupled with next-generation sequencing, we analyzed A-to-I editing at similar to 100 high-confidence editing sites within the mouse brain. CSDS resulted in acute regulation of transcripts encoding several ADAR enzymes, which normalized 8 days following the final defeat and was specific for susceptible mice. In contrast, sequencing analysis revealed modest and dynamic regulation of A-to-I editing within numerous transcripts in both the mPFC and BLA of resilient and susceptible nice at both 2 and 8 days following CSDS with minimal overlap between regions and time points. Editing within the Htr2c transcript and relative abundance of Htr2c messenger RNA (mRNA) variants were also observed within the BLA of susceptible nice 2 days following CSDS. These results indicate dynamic RNA editing within discrete brain regions following CSDS in mice, further implicating A-to-I editing as a stress-sensitive molecular mechanism within the brain of potential relevance to resiliency and susceptibility to CSDS.
引用
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页数:12
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