title: Neuroligin-associated microRNA-932 targets actin and regulates memory in the honeybee.
abstract: Increasing evidence suggests small non-coding RNAs (ncRNAs) such as microRNAs (miRNAs) control levels of mRNA expression during experience-related remodelling of the brain. Here we use an associative olfactory learning paradigm in the honeybee Apis mellifera to examine gene expression changes in the brain during memory formation. Brain transcriptome analysis reveals a general downregulation of protein-coding genes, including asparagine synthetase and actin, and upregulation of ncRNAs. miRNA-mRNA network predictions together with PCR validation suggest miRNAs including miR-210 and miR-932 target the downregulated protein-coding genes. Feeding cholesterol-conjugated antisense RNA to bees results in the inhibition of miR-210 and of miR-932. Loss of miR-932 impairs long-term memory formation, but not memory acquisition. Functional analyses show that miR-932 interacts with Act5C, providing evidence for direct regulation of actin expression by an miRNA. An activity-dependent increase in miR-932 expression may therefore control actin-related plasticity mechanisms and affect memory formation in the brain.
authors.affiliation: Queensland Brain Institute, The University of Queensland, Brisbane, Queensland 4072, Australia.
authors.forename: Alexandre S
authors.initials: AS
authors.lastname: Cristino
authors.affiliation: Universidade Federal de Alfenas, Alfenas, Minas Gerais 37130-000, Brazil.
authors.forename: Angel R
authors.initials: AR
authors.lastname: Barchuk
authors.affiliation: 1] Queensland Brain Institute, The University of Queensland, Brisbane, Queensland 4072, Australia [2] Universidade de Sao Paulo, Ribeirao Preto, São Paulo 14040-040, Brazil.
authors.forename: Flavia C P
authors.initials: FC
authors.lastname: Freitas
authors.affiliation: Queensland Brain Institute, The University of Queensland, Brisbane, Queensland 4072, Australia.
authors.forename: Ramesh K
authors.initials: RK
authors.lastname: Narayanan
authors.affiliation: 1] Queensland Brain Institute, The University of Queensland, Brisbane, Queensland 4072, Australia [2] University of Konstanz, 78464 Konstanz, Germany.
authors.forename: Stephanie D
authors.initials: SD
authors.lastname: Biergans
authors.affiliation: Queensland Brain Institute, The University of Queensland, Brisbane, Queensland 4072, Australia.
authors.forename: Zhengyang
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: Universidade de Sao Paulo, Ribeirao Preto, São Paulo 14040-040, Brazil.
authors.forename: Zila L P
authors.initials: ZL
authors.lastname: Simoes
authors.affiliation: Queensland Brain Institute, The University of Queensland, Brisbane, Queensland 4072, Australia.
authors.forename: Judith
authors.initials: J
authors.lastname: Reinhard
authors.affiliation: Queensland Brain Institute, The University of Queensland, Brisbane, Queensland 4072, Australia.
authors.forename: Charles
authors.initials: C
authors.lastname: Claudianos
mesh_terms: D000199:Actins / Q000235:genetics* / Q000378:metabolism; D000818:Animals; D001516:Bees; D001921:Brain / Q000378:metabolism*; D020869:Gene Expression Profiling; D007858:Learning; D008568:Memory / Q000502:physiology*; D035683:MicroRNAs / Q000235:genetics* / Q000378:metabolism; D009473:Neuronal Plasticity / Q000235:genetics*; D022661:RNA, Untranslated / Q000235:genetics
chemical_list: D000199:Actins; D035683:MicroRNAs; D022661:RNA, Untranslated