PMID- 28488209 OWN - NLM STAT- MEDLINE DCOM- 20190204 LR - 20190215 IS - 1559-1182 (Electronic) IS - 0893-7648 (Linking) VI - 55 IP - 4 DP - 2018 Apr TI - miR-135a Regulates Synaptic Transmission and Anxiety-Like Behavior in Amygdala. PG - 3301-3315 LID - 10.1007/s12035-017-0564-9 [doi] AB - MicroRNAs are a class of non-coding RNAs with a growing relevance in the regulation of gene expression related to brain function and plasticity. They have the potential to orchestrate complex phenomena, such as the neuronal response to homeostatic challenges. We previously demonstrated the involvement of miR-135a in the regulation of early stress response. In the present study, we examine the role of miR-135a in stress-related behavior. We show that the knockdown (KD) of miR-135a in the mouse amygdala induces an increase in anxiety-like behavior. Consistently with behavioral studies, electrophysiological experiments in acute brain slices indicate an increase of amygdala spontaneous excitatory postsynaptic currents, as a result of miR-135a KD. Furthermore, we presented direct evidences, by in vitro assays and in vivo miRNA overexpression in the amygdala, that two key regulators of synaptic vesicle fusion, complexin-1 and complexin-2, are direct targets of miR-135a. In vitro analysis of miniature excitatory postsynaptic currents on miR-135a KD primary neurons indicates unpaired quantal excitatory neurotransmission. Finally, increased levels of complexin-1 and complexin-2 proteins were detected in the mouse amygdala after acute stress, accordingly to the previously observed stress-induced miR-135a downregulation. Overall, our results unravel a previously unknown miRNA-dependent mechanism in the amygdala for regulating anxiety-like behavior, providing evidences of a physiological role of miR-135a in the modulation of presynaptic mechanisms of glutamatergic neurotransmission. FAU - Mannironi, Cecilia AU - Mannironi C AUID- ORCID: 0000-0001-6934-8425 AD - Istituto di Biologia e Patologia Molecolari, CNR, c/o Sapienza Universita' di Roma, Rome, Italy. cecilia.mannironi@uniroma1.it. FAU - Biundo, Antonio AU - Biundo A AD - Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Universita' di Roma, Rome, Italy. FAU - Rajendran, Samyutha AU - Rajendran S AD - Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Universita' di Roma, Rome, Italy. AD - Istituto di Biologia Cellulare e Neurobiologia, CNR, Rome, Italy. AD - Centro di Ricerca in Neurobiologia "D. Bovet", Sapienza Universita' di Roma, Rome, Italy. FAU - De Vito, Francesca AU - De Vito F AD - Fondazione Santa Lucia, I.R.C.C.S, Rome, Italy. FAU - Saba, Luana AU - Saba L AD - Fondazione Santa Lucia, I.R.C.C.S, Rome, Italy. FAU - Caioli, Silvia AU - Caioli S AD - Fondazione Santa Lucia, I.R.C.C.S, Rome, Italy. FAU - Zona, Cristina AU - Zona C AD - Fondazione Santa Lucia, I.R.C.C.S, Rome, Italy. AD - Dipartimento di Medicina dei Sistemi, Universita' di Roma "Tor Vergata", Rome, Italy. FAU - Ciotti, Teresa AU - Ciotti T AD - Istituto di Biologia Cellulare e Neurobiologia, CNR, Rome, Italy. FAU - Caristi, Silvana AU - Caristi S AD - Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Universita' di Roma, Rome, Italy. FAU - Perlas, Emerald AU - Perlas E AD - Mouse Biology Unit, European Molecular Biology Laboratory (EMBL), Monterotondo Scalo, Rome, Italy. FAU - Del Vecchio, Giorgia AU - Del Vecchio G AD - Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Universita' di Roma, Rome, Italy. FAU - Bozzoni, Irene AU - Bozzoni I AD - Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Universita' di Roma, Rome, Italy. FAU - Rinaldi, Arianna AU - Rinaldi A AD - Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Universita' di Roma, Rome, Italy. AD - Istituto di Biologia Cellulare e Neurobiologia, CNR, Rome, Italy. AD - Centro di Ricerca in Neurobiologia "D. Bovet", Sapienza Universita' di Roma, Rome, Italy. FAU - Mele, Andrea AU - Mele A AD - Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Universita' di Roma, Rome, Italy. AD - Istituto di Biologia Cellulare e Neurobiologia, CNR, Rome, Italy. AD - Centro di Ricerca in Neurobiologia "D. Bovet", Sapienza Universita' di Roma, Rome, Italy. FAU - Presutti, Carlo AU - Presutti C AD - Istituto di Biologia e Patologia Molecolari, CNR, c/o Sapienza Universita' di Roma, Rome, Italy. AD - Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Universita' di Roma, Rome, Italy. LA - eng GR - Project F57I12000110009/Filas/ GR - AdG 340172-MUNCODD/ERC-2013/ GR - full grant 2014 "RNA circuitries in Amyotrophic Lateral Sclerosis pathogenesis"/Arisla/ PT - Journal Article DEP - 20170509 PL - United States TA - Mol Neurobiol JT - Molecular neurobiology JID - 8900963 RN - 0 (Adaptor Proteins, Vesicular Transport) RN - 0 (MicroRNAs) RN - 0 (Mirn135 microRNA, mouse) RN - 0 (Nerve Tissue Proteins) RN - 0 (RNA, Messenger) RN - 0 (complexin I) RN - 0 (complexin II) SB - IM MH - Adaptor Proteins, Vesicular Transport/genetics/metabolism MH - Amygdala/*metabolism/pathology/*physiopathology MH - Animals MH - Anxiety/*genetics/*physiopathology MH - *Behavior, Animal MH - Cell Line, Tumor MH - Excitatory Postsynaptic Potentials MH - Gene Expression Regulation MH - Gene Knockdown Techniques MH - Hippocampus/pathology MH - Humans MH - Mice, Inbred C57BL MH - MicroRNAs/genetics/*metabolism MH - Nerve Tissue Proteins/genetics/metabolism MH - Neurons/metabolism MH - RNA, Messenger/genetics/metabolism MH - Stress, Physiological/genetics MH - Synaptic Transmission/*genetics OTO - NOTNLM OT - Amygdala OT - Post-transcriptional regulation OT - Stress-related disease OT - Synaptic activity OT - Synaptic transmission OT - miR-135a OT - microRNAs EDAT- 2017/05/11 06:00 MHDA- 2019/02/05 06:00 CRDT- 2017/05/11 06:00 PHST- 2017/02/01 00:00 [received] PHST- 2017/04/17 00:00 [accepted] PHST- 2017/05/11 06:00 [pubmed] PHST- 2019/02/05 06:00 [medline] PHST- 2017/05/11 06:00 [entrez] AID - 10.1007/s12035-017-0564-9 [pii] AID - 10.1007/s12035-017-0564-9 [doi] PST - ppublish SO - Mol Neurobiol. 2018 Apr;55(4):3301-3315. doi: 10.1007/s12035-017-0564-9. Epub 2017 May 9.