Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, China; Brain Research Center, Zhongnan Hospital of Wuhan University, Wuhan, China; Medical Research Institute, Wuhan University, Wuhan, China.
Cognitive Neuroepigenetics Laboratory, Queensland Brain Institute, The University of Queensland, Brisbane, Australia.
Cell Rep. 2022 Mar 22;38(12):110546. doi: 10.1016/j.celrep.2022.110546.
Here, we used RNA capture-seq to identify a large population of lncRNAs that are expressed in the infralimbic prefrontal cortex of adult male mice in response to fear-related learning. Combining these data with cell-type-specific ATAC-seq on neurons that had been selectively activated by fear extinction learning, we find inducible 434 lncRNAs that are derived from enhancer regions in the vicinity of protein-coding genes. In particular, we discover an experience-induced lncRNA we call ADRAM (activity-dependent lncRNA associated with memory) that acts as both a scaffold and a combinatorial guide to recruit the brain-enriched chaperone protein 14-3-3 to the promoter of the memory-associated immediate-early gene Nr4a2 and is required fear extinction memory. This study expands the lexicon of experience-dependent lncRNA activity in the brain and highlights enhancer-derived RNAs (eRNAs) as key players in the epigenomic regulation of gene expression associated with the formation of fear extinction memory.
在这里,我们使用 RNA 捕获测序来鉴定在成年雄性小鼠的前扣带皮层中表达的一大类长非编码 RNA,这些 RNA 对与恐惧相关的学习有反应。将这些数据与通过恐惧消退学习选择性激活的神经元的细胞类型特异性 ATAC-seq 相结合,我们发现了 434 个诱导性的长非编码 RNA,它们来自附近蛋白质编码基因的增强子区域。特别是,我们发现了一种由经验诱导的长非编码 RNA,我们称之为 ADRAM(与记忆相关的活性依赖性长非编码 RNA),它既作为支架,又作为组合向导,将富含大脑的伴侣蛋白 14-3-3 招募到记忆相关的早期基因 Nr4a2 的启动子,并且需要恐惧消退记忆。这项研究扩展了大脑中与经验相关的长非编码 RNA 活性的词汇,并强调了增强子衍生的 RNA(eRNA)作为与恐惧消退记忆形成相关的基因表达的表观基因组调控中的关键因素。