Research Paper Volume 10, Issue 12 pp 3794—3805
Sevoflurane impairs learning and memory of the developing brain through post-transcriptional inhibition of CCNA2 via microRNA-19-3p
- 1 Department of Anesthesiology, the Second Hospital of Shandong University, Jinan 250033, China
- 2 Operating Room, Jinan Central Hospital, Affiliated to Shandong University, Jinan 250013, China
- 3 Department of Research, the Second Hospital of Shandong University, Jinan 250033, China
- 4 Department of Anesthesiology, Qianfoshan Hospital of Shandong Province, Affiliated to Shandong University, Jinan 250014, China
Received: October 9, 2018 Accepted: November 15, 2018 Published: December 12, 2018
https://doi.org/10.18632/aging.101673How to Cite
Abstract
The molecular mechanisms underlying sevoflurane (SEVO)-induced impairment of learning and memory remain unclear. Specifically, a role of microRNAs (miRNAs) in the control of the neuron proliferation in the developing brain exposed to SEVO has not been reported previously. Here, we studied the effects of SEVO exposure on the neural cell proliferation, and on the learning and memory of neonatal rats. We found that SEVO exposure significantly decreased neuron cell proliferation, reduced BDNF levels in brain, and impaired learning and memory of neonatal rats in Morris water maze test and Plus-Maze discriminative avoidance task (PM-DAT), likely through downregulation of CCNA2 protein. Next, we used bioinformatic tools to predict CCNA2-binding microRNAs (miRNAs), and found that miR-19-3p was upregulated in neurons exposed to SEVO. Moreover, miR-19-3p functionally inhibited the protein translation of CCNA2 in a human neural cell line, HCN-2. Furthermore, intracranial injection of adeno-associated virus carrying antisense of miR-19-3p under a CMV promoter into the neonatal rats significantly alleviated SEVO exposure-induced impairment of neuron cell proliferation, as well as the learning and memory of the rats. Together, our data suggest that SEVO-induced upregulation of miR-19-3p post-transcriptionally inhibits CCNA2, which contributes to the SEVO-associated impairment of learning and memory of the neonatal rats.