Transcriptome and chromatin alterations in social fear indicate association of MEG3 with successful extinction of fear

Melanie Royer, Balagopal Pai, Rohit Menon, Anna Bludau, Katharina Gryksa, Rotem Ben-Tov Perry, Igor Ulitsky, Gunter Meister, Inga D Neumann

Research output: Contribution to journalArticlepeer-review

Abstract

Social anxiety disorder is characterized by a persistent fear and avoidance of social situations, but available treatment options are rather unspecific. Using an established mouse social fear conditioning (SFC) paradigm, we profiled gene expression and chromatin alterations after the acquisition and extinction of social fear within the septum, a brain region important for social fear and social behaviors. Here, we particularly focused on the successful versus unsuccessful outcome of social fear extinction training, which corresponds to treatment responsive versus resistant patients in the clinics. Validation of coding and non-coding RNAs revealed specific isoforms of the long non-coding RNA (lncRNA) Meg3 regulated, depending on the success of social fear extinction. Moreover, PI3K/AKT was differentially activated with extinction success in SFC-mice. In vivo knockdown of specific Meg3 isoforms increased baseline activity of PI3K/AKT signaling, and mildly delayed social fear extinction. Using ATAC-Seq and CUT&RUN, we found alterations in the chromatin structure of specific genes, which might be direct targets of lncRNA Meg3.<br />
Original languageEnglish
Pages (from-to)4064-4076
Number of pages13
JournalMolecular Psychiatry
Volume27
Early online date25 Mar 2022
DOIs
StatePublished - Oct 2022

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