MicroRNA miR-137 Regulates Neuronal Maturation by Targeting Ubiquitin Ligase Mind Bomb-1 (original) (raw)

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Department of Neurosciences, University of New Mexico School of Medicine

, Albuquerque, New Mexico,

USA

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Department of Human Genetics and Graduate Program in Genetics and Molecular Biology, Emory University School of Medicine

, Atlanta, Georgia,

USA

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Department of Neurosciences, University of New Mexico School of Medicine

, Albuquerque, New Mexico,

USA

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Department of Neurosciences, University of New Mexico School of Medicine

, Albuquerque, New Mexico,

USA

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Department of Neurosciences, University of New Mexico School of Medicine

, Albuquerque, New Mexico,

USA

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Department of Neurosurgery, Yale School of Medicine

, New Haven, Connecticut,

USA

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Department of Neurosciences, University of New Mexico School of Medicine

, Albuquerque, New Mexico,

USA

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,

Department of Neurosciences, University of New Mexico School of Medicine

, Albuquerque, New Mexico,

USA

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,

Department of Human Genetics and Graduate Program in Genetics and Molecular Biology, Emory University School of Medicine

, Atlanta, Georgia,

USA

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,

Department of Neurosurgery, Yale School of Medicine

, New Haven, Connecticut,

USA

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Received:

30 December 2009

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Richard D. Smrt, Keith E. Szulwach, Rebecca L. Pfeiffer, Xuekun Li, Weixiang Guo, Manavendra Pathania, Zhao-Qian Teng, Yuping Luo, Junmin Peng, Angelique Bordey, Peng Jin, Xinyu Zhao, MicroRNA miR-137 Regulates Neuronal Maturation by Targeting Ubiquitin Ligase Mind Bomb-1, Stem Cells, Volume 28, Issue 6, June 2010, Pages 1060–1070, https://doi.org/10.1002/stem.431
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Abstract

The maturation of young neurons is regulated by complex mechanisms and dysregulation of this process is frequently found in neurodevepmental disorders. MicroRNAs have been implicated in several steps of neuronal maturation including dendritic and axonal growth, spine development, and synaptogenesis. We demonstrate that one brain-enriched microRNA, miR-137, has a significant role in regulating neuronal maturation. Overexpression of miR-137 inhibits dendritic morphogenesis, phenotypic maturation, and spine development both in brain and cultured primary neurons. On the other hand, a reduction in miR-137 had opposite effects. We further show that miR-137 targets the Mind bomb one (Mib1) protein through the conserved target site located in the 3′ untranslated region of Mib1 messenger RNA. Mib1 is an ubiquitin ligase known to be important for neurodevelopment. We show that exogenously expressed Mib1 could partially rescue the phenotypes associated with miR-137 overexpression. These results demonstrate a novel miRNA-mediated mechanism involving miR-137 and Mib1 that function to regulate neuronal maturation and dendritic morphogenesis during development.

Copyright © 2010 AlphaMed Press

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