title: Evidence for selective microRNAs and their effectors as common long-term targets for the actions of mood stabilizers.
abstract: MicroRNAs (miRNAs) regulate messenger RNA (mRNA) translation in a sequence-specific manner and are emerging as critical regulators of central nervous system plasticity. We found hippocampal miRNA level changes following chronic treatment with mood stabilizers (lithium and valproate (VPA)). Several of these miRNAs were then confirmed by quantitative PCR: let-7b, let-7c, miR-128a, miR-24a, miR-30c, miR-34a, miR-221, and miR-144. The predicted effectors of these miRNAs are involved in neurite outgrowth, neurogenesis, and signaling of PTEN, ERK, and Wnt/beta-catenin pathways. Interestingly, several of these effector-coding genes are also genetic risk candidates for bipolar disorder. We provide evidence that treatment with mood stabilizers increases these potential susceptibility genes in vivo: dipeptidyl-peptidase 10, metabotropic glutamate receptor 7 (GRM7), and thyroid hormone receptor, beta. Treatment of primary cultures with lithium- or VPA-lowered levels of miR-34a and elevated levels of GRM7, a predicted effector of miR-34a. Conversely, miR-34a precursor treatment lowered GRM7 levels and treatment with a miR-34a inhibitor enhanced GRM7 levels. These data confirm that endogenous miR-34a regulates GRM7 levels and supports the notion that miR-34a contributes to the effects of lithium and VPA on GRM7. These findings are the first to demonstrate that miRNAs and their predicted effectors are targets for the action of psychotherapeutic drugs.
authors.affiliation: Laboratory of Molecular Pathophysiology, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA.
authors.forename: Rulun
authors.initials: R
authors.lastname: Zhou
authors.forename: Peixiong
authors.initials: P
authors.lastname: Yuan
authors.forename: Yun
authors.initials: Y
authors.lastname: Wang
authors.forename: Joshua G
authors.initials: JG
authors.lastname: Hunsberger
authors.forename: Abdel
authors.initials: A
authors.lastname: Elkahloun
authors.forename: Yanling
authors.initials: Y
authors.lastname: Wei
authors.forename: Patricia
authors.initials: P
authors.lastname: Damschroder-Williams
authors.forename: Jing
authors.initials: J
authors.lastname: Du
authors.forename: Guang
authors.initials: G
authors.lastname: Chen
authors.forename: Husseini K
authors.initials: HK
authors.lastname: Manji
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D018692:Antimanic Agents / Q000494:pharmacology*; D015153:Blotting, Western; D002478:Cells, Cultured; D004152:Dipeptidyl-Peptidases and Tripeptidyl-Peptidases / Q000378:metabolism; D006624:Hippocampus / Q000187:drug effects* / Q000378:metabolism*; D018020:Lithium Compounds / Q000494:pharmacology*; D008297:Male; D035683:MicroRNAs / Q000378:metabolism*; D046228:Microarray Analysis; D009474:Neurons / Q000187:drug effects / Q000502:physiology; D016133:Polymerase Chain Reaction; D051381:Rats; D011921:Rats, Inbred WKY; D018094:Receptors, Metabotropic Glutamate / Q000378:metabolism; D037042:Thyroid Hormone Receptors beta / Q000378:metabolism; D014635:Valproic Acid / Q000494:pharmacology*
chemical_list: D018692:Antimanic Agents; D018020:Lithium Compounds; D035683:MicroRNAs; D018094:Receptors, Metabotropic Glutamate; D037042:Thyroid Hormone Receptors beta; D014635:Valproic Acid; C523849:DPP10 protein, rat; D004152:Dipeptidyl-Peptidases and Tripeptidyl-Peptidases