| The angelman syndrome protein ube3a is required for polarized dendrite morphogenesis in pyramidal neurons. | |
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MedLine Citation:
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PMID: 23283345 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Pyramidal neurons have a highly polarized dendritic morphology, characterized by one long apical dendrite and multiple short basal dendrites. They function as the primary excitatory cells of the mammalian prefrontal cortex and the corticospinal tract. However, the molecular mechanisms underlying the development of polarized dendrite morphology in pyramidal neurons remain poorly understood. Here, we report that the Angelman syndrome (AS) protein ubiquitin-protein ligase E3A (Ube3a) plays an important role in specifying the polarization of pyramidal neuron dendritic arbors in mice. shRNA-mediated downregulation of Ube3a selectively inhibited apical dendrite outgrowth and resulted in impaired dendrite polarity, which could be rescued by coexpressing mouse Ube3a isoform 2, but not isoform 1 or 3. Ube3a knockdown also disrupted the polarized distribution of the Golgi apparatus, a well established cellular mechanism for asymmetric dendritic growth in pyramidal neurons. Furthermore, downregulation of Ube3a completely blocked Reelin-induced rapid deployment of Golgi into dendrite. Consistently, we also observed selective inhibition of apical dendrite outgrowth in pyramidal neurons in a mouse model of AS. Overall, these results show that Ube3a is required for the specification of the apical dendrites and dendrite polarization in pyramidal neurons, and suggest a novel pathological mechanism for AS. |
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Authors:
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Sheng Miao; Renchao Chen; Jiahao Ye; Guo-He Tan; Shuai Li; Jing Zhang; Yong-Hui Jiang; Zhi-Qi Xiong |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of neuroscience : the official journal of the Society for Neuroscience Volume: 33 ISSN: 1529-2401 ISO Abbreviation: J. Neurosci. Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2013-01-03 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8102140 Medline TA: J Neurosci Country: United States |
Other Details:
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Languages: eng Pagination: 327-33 Citation Subset: IM |
Affiliation:
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Institute of Neuroscience and State Key Laboratory of Neuroscience, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China and Division of Medical Genetics, Department of Pediatrics, Duke University School of Medicine, Durham, North Carolina 27710. |
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