Genome-wide analysis implicates microRNAs and their target genes in the development of bipolar disorder

Bipolar disorder (BD) is a severe and highly heritable neuropsychiatric disorder with a lifetime prevalence of 1%. Molecular genetic studies have identified the first BD susceptibility genes. However, the disease pathways remain largely unknown. Accumulating evidence suggests that microRNAs, a class...

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Detalles Bibliográficos
Autores: Forstner, A J, Hofmann, A, Maaser, A, Sumer, S, Khudayberdiev, S, Mühleisen, T W, Leber, M, Schulze, T G, Strohmaier, J, Degenhardt, F, Treutlein, J, Mattheisen, M, Schumacher, J, Breuer, R, Meier, S, Herms, S, Hoffmann, P, Lacour, A, Witt, S H, Reif, A, Müller-Myhsok, B, Lucae, S, Maier, W, Schwarz, M, Vedder, H, Kammerer-Ciernioch, J, Pfennig, A, Bauer, M, Hautzinger, M, Moebus, S, Priebe, L, Sivalingam, S, Verhaert, A, Schulz, H, Czerski, P M, Hauser, J, Lissowska, J, Szeszenia-Dabrowska, N, Brennan, P, McKay, J D, Wright, A, Mitchell, P B, Fullerton, J M, Schofield, P R, Montgomery, G W, Medland, S E, Gordon, S D, Martin, N G, Krasnov, V, Chuchalin, A, Babadjanova, G, Pantelejeva, G, Abramova, L I, Tiganov, A S, Polonikov, A, Khusnutdinova, E, Alda, M, Cruceanu, C, Rouleau, G A, Turecki, G, Laprise, C, Rivas, F, Mayoral, F, Kogevinas, M, Grigoroiu-Serbanescu, M, Propping, P, Becker, T, Rietschel, M, Cichon, S, Schratt, G, Nöthen, M M
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Instituto de Salud Carlos III (ISCIII)
Repositorio:Repisalud
Idioma:inglés
OAI Identifier:oai:repisalud.isciii.es:20.500.12105/18876
Acceso en línea:http://hdl.handle.net/20.500.12105/18876
Access Level:acceso abierto
Palabra clave:Trastorno bipolar
Prevalencia
MicroARN
Plasticidad neuronal
Predisposición genética a la enfermedad
Hipocampo
Ratas
Bipolar Disorder
Prevalence
MicroRNAs
Neuronal Plasticity
Genetic Predisposition to Disease
Hippocampus
Rats
Descripción
Sumario:Bipolar disorder (BD) is a severe and highly heritable neuropsychiatric disorder with a lifetime prevalence of 1%. Molecular genetic studies have identified the first BD susceptibility genes. However, the disease pathways remain largely unknown. Accumulating evidence suggests that microRNAs, a class of small noncoding RNAs, contribute to basic mechanisms underlying brain development and plasticity, suggesting their possible involvement in the pathogenesis of several psychiatric disorders, including BD. In the present study, gene-based analyses were performed for all known autosomal microRNAs using the largest genome-wide association data set of BD to date (9747 patients and 14 278 controls). Associated and brain-expressed microRNAs were then investigated in target gene and pathway analyses. Functional analyses of miR-499 and miR-708 were performed in rat hippocampal neurons. Ninety-eight of the six hundred nine investigated microRNAs showed nominally significant P-values, suggesting that BD-associated microRNAs might be enriched within known microRNA loci. After correction for multiple testing, nine microRNAs showed a significant association with BD. The most promising were miR-499, miR-708 and miR-1908. Target gene and pathway analyses revealed 18 significant canonical pathways, including brain development and neuron projection. For miR-499, four Bonferroni-corrected significant target genes were identified, including the genome-wide risk gene for psychiatric disorder CACNB2. First results of functional analyses in rat hippocampal neurons neither revealed nor excluded a major contribution of miR-499 or miR-708 to dendritic spine morphogenesis. The present results suggest that research is warranted to elucidate the precise involvement of microRNAs and their downstream pathways in BD.

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