A study in mice demonstrated that neuronal activity rapidly induces transcription of the CREB-regulated microRNA-132 in vivo, with its primary transcript (pri-miR-132) showing a robust, rapid, and transient increase following pilocarpine-induced seizures, cocaine injection, odorant exposure, and contextual fear conditioning, peaking at 45 minutes and returning to baseline within 2 hours [Nudelman et al. DOI:10.1002/Hipo.20646]. Research in rats established that specific overexpression of the mir-132 in neural stem cells of the adult dentate gyrus potentiates the acquisition and resists the extinction of morphine self-administration, indicating its involvement in opioid addiction [Jia et al. DOI:10.1007/S12264-019-00338-Z].