1
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Oner M, Cheng PT, Wang HY, Chen MC, Lin H. Metformin alters dendrite development and synaptic plasticity in rat cortical neurons. Biochem Biophys Res Commun 2024; 710:149874. [PMID: 38581950 DOI: 10.1016/j.bbrc.2024.149874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Accepted: 03/29/2024] [Indexed: 04/08/2024]
Abstract
Synaptic plasticity is crucial as it dynamically molds the strength and connectivity of neural circuits, influencing learning, memory, and the development of neurological disorders. Metformin, a widely prescribed anti-diabetic medication, has been shown to readily cross the blood-brain barrier (BBB) and the placenta. However, its prolonged impact on neuronal morphology and functions remains underexplored. In this study, we investigated the influence of metformin on dendrite development and synaptic plasticity in embryonic brains and primary rat cortical neurons. Our findings reveal a negative modulation of dendrite development by metformin, as evidenced by altered dendritic arborization, impaired dendritic spine morphology and disruptions in synaptic plasticity, suggesting a potential link between metformin exposure and aberrations in neuronal connectivity. In addition, we extend our insights to the impact of maternal metformin exposure on embryonic brains, revealing a significant inhibition of dendrite development in E18.5 rat brains. In conclusion, this study adds to the expanding knowledge base on the non-metabolic effects of metformin, emphasizing the significance of assessing its potential influence on both neuronal structure and function. There is an urgent need for further investigations into the enduring impact of prolonged metformin administration on the structural and functional aspects of neurons.
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Affiliation(s)
- Muhammet Oner
- Department of Life Sciences, National Chung Hsing University, Taichung, 40227, Taiwan
| | - Pang-Ting Cheng
- Department of Life Sciences, National Chung Hsing University, Taichung, 40227, Taiwan
| | - Hsin-Yi Wang
- Department of Nuclear Medicine, Taichung Veterans General Hospital Taichung, 40705, Taiwan
| | - Mei-Chih Chen
- Translational Cell Therapy Center, Department of Medical Research, China Medical University Hospital, Taichung, 40447, Taiwan
| | - Ho Lin
- Department of Life Sciences, National Chung Hsing University, Taichung, 40227, Taiwan.
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2
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Crespo I, Pignatelli J, Kinare V, Méndez-Gómez HR, Esgleas M, Román MJ, Canals JM, Tole S, Vicario C. Tbr1 Misexpression Alters Neuronal Development in the Cerebral Cortex. Mol Neurobiol 2022; 59:5750-5765. [PMID: 35781633 PMCID: PMC9395452 DOI: 10.1007/s12035-022-02936-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 06/10/2022] [Indexed: 11/26/2022]
Abstract
Changes in the transcription factor (TF) expression are critical for brain development, and they may also underlie neurodevelopmental disorders. Indeed, T-box brain1 (Tbr1) is a TF crucial for the formation of neocortical layer VI, and mutations and microdeletions in that gene are associated with malformations in the human cerebral cortex, alterations that accompany autism spectrum disorder (ASD). Interestingly, Tbr1 upregulation has also been related to the occurrence of ASD-like symptoms, although limited studies have addressed the effect of increased Tbr1 levels during neocortical development. Here, we analysed the impact of Tbr1 misexpression in mouse neural progenitor cells (NPCs) at embryonic day 14.5 (E14.5), when they mainly generate neuronal layers II–IV. By E18.5, cells accumulated in the intermediate zone and in the deep cortical layers, whereas they became less abundant in the upper cortical layers. In accordance with this, the proportion of Sox5+ cells in layers V–VI increased, while that of Cux1+ cells in layers II–IV decreased. On postnatal day 7, fewer defects in migration were evident, although a higher proportion of Sox5+ cells were seen in the upper and deep layers. The abnormal neuronal migration could be partially due to the altered multipolar-bipolar neuron morphologies induced by Tbr1 misexpression, which also reduced dendrite growth and branching, and disrupted the corpus callosum. Our results indicate that Tbr1 misexpression in cortical NPCs delays or disrupts neuronal migration, neuronal specification, dendrite development and the formation of the callosal tract. Hence, genetic changes that provoke ectopic Tbr1 upregulation during development could provoke cortical brain malformations.
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Affiliation(s)
- Inmaculada Crespo
- Instituto Cajal-Consejo Superior de Investigaciones Científicas (CSIC), Avenida Doctor Arce 37, 28002, Madrid, Spain.,CIBERNED-Instituto de Salud Carlos III (ISCIII), Madrid, Spain.,CES Cardenal Cisneros, Madrid, Spain
| | - Jaime Pignatelli
- Instituto Cajal-Consejo Superior de Investigaciones Científicas (CSIC), Avenida Doctor Arce 37, 28002, Madrid, Spain.,CIBERNED-Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Veena Kinare
- Department of Life Sciences, Sophia College for Women, Mumbai, 400026, India
| | - Héctor R Méndez-Gómez
- Instituto Cajal-Consejo Superior de Investigaciones Científicas (CSIC), Avenida Doctor Arce 37, 28002, Madrid, Spain.,CIBERNED-Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Miriam Esgleas
- CIBERNED-Instituto de Salud Carlos III (ISCIII), Madrid, Spain.,Laboratory of Stem Cells and Regenerative Medicine, Department of Biomedical Sciences, Creatio, Production and Validation Center of Advanced Therapies, Faculty of Medicine and Health Sciences, Institute of Neurosciences, University of Barcelona, Barcelona, Spain.,August Pi I Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - María José Román
- Instituto Cajal-Consejo Superior de Investigaciones Científicas (CSIC), Avenida Doctor Arce 37, 28002, Madrid, Spain.,CIBERNED-Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Josep M Canals
- CIBERNED-Instituto de Salud Carlos III (ISCIII), Madrid, Spain.,Laboratory of Stem Cells and Regenerative Medicine, Department of Biomedical Sciences, Creatio, Production and Validation Center of Advanced Therapies, Faculty of Medicine and Health Sciences, Institute of Neurosciences, University of Barcelona, Barcelona, Spain.,August Pi I Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Shubha Tole
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, 400005, India
| | - Carlos Vicario
- Instituto Cajal-Consejo Superior de Investigaciones Científicas (CSIC), Avenida Doctor Arce 37, 28002, Madrid, Spain. .,CIBERNED-Instituto de Salud Carlos III (ISCIII), Madrid, Spain.
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3
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Zhao M, Zhu Z, Li H, Wang W, Cheng S, Qin X, Wu H, Liu D, Pan F. Effects of traumatic stress in adolescence on PTSD-like behaviors, dendrite development, and H3K9me2/BDNF expression in the amygdala of male rats. J Affect Disord 2022; 296:388-399. [PMID: 34619155 DOI: 10.1016/j.jad.2021.09.101] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 09/04/2021] [Accepted: 09/26/2021] [Indexed: 12/22/2022]
Abstract
Early detrimental experiences increase the risk of psychiatric disorders, including posttraumatic stress disorder (PTSD). In a previous experiment, we demonstrated that traumatic stress in adolescence triggers changes in the expression of the epigenetic marker H3K9me2 in the hippocampus and prefrontal cortex of adolescent and adult rats, which suppresses transcription of the brain-derived neurotrophic factor (Bdnf) gene that promotes dendrite development and synaptic growth. However, corresponding changes in the amygdala in response to traumatic stress in early life have not yet been fully elucidated. In the current study, we used the inescapable foot shock (IFS) procedure to establish a PTSD model. Half an hour after the end of electric shocks, intraperitoneal injection of the G9a enzyme inhibitor Unc0642, a small molecule inhibitor of EHMT2 that can decrease H3K9me2 expression, was applied to reverse the corresponding epigenetic changes. Exploratory behaviors, anxiety-like behavior, social communication ability, spatial exploration and memory were determined using the open field test (OFT), elevated plus maze (EPM) test, three-chamber sociability test (SIT), Morris water maze (MWM) test, and Y maze test (YMZ), respectively. Additionally, the levels of H3K9me2 and BDNF were measured by quantitative reverse transcription-polymerase chain reaction (qPCR) and Western blotting. Furthermore, neuronal development was examined using Golgi staining. The results showed that the IFS procedure induced anxiety-like and depression-like behaviors, social skills dysfunction, and spatial exploration and memory disorders. It also decreased the mRNA expression of BDNF and BDNF and increased the expression of H3K9me2 in the amygdala. More importantly, compared to unstressed animals, traumatic stress during adolescence induced dendrite maldevelopment in adolescent and adult rats. In summary, the present study indicates that early-life stress alters the epigenetic marker expression of H3K9me2 and decreases levels of BDNF in the amygdala, resulting in dendrite maldevelopment and a higher risk of mental disorders.
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Affiliation(s)
- Mingyue Zhao
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong 250012, PR China
| | - Zemeng Zhu
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong 250012, PR China
| | - Haonan Li
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong 250012, PR China
| | - Wei Wang
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong 250012, PR China
| | - Shuyue Cheng
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong 250012, PR China
| | - Xiaqing Qin
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong 250012, PR China
| | - Huiran Wu
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong 250012, PR China
| | - Dexiang Liu
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong 250012, PR China
| | - Fang Pan
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong 250012, PR China.
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4
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Cheng J, Zhao Z, Chen L, Li Y, Du R, Wu Y, Zhu Q, Fan M, Duan X, Wu H. Loss of O-GlcNAcylation on MeCP2 at Threonine 203 Leads to Neurodevelopmental Disorders. Neurosci Bull 2022; 38:113-34. [PMID: 34773221 DOI: 10.1007/s12264-021-00784-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 08/06/2021] [Indexed: 02/03/2023] Open
Abstract
Mutations of the X-linked methyl-CpG-binding protein 2 (MECP2) gene in humans are responsible for most cases of Rett syndrome (RTT), an X-linked progressive neurological disorder. While genome-wide screens in clinical trials have revealed several putative RTT-associated mutations in MECP2, their causal relevance regarding the functional regulation of MeCP2 at the etiologic sites at the protein level requires more evidence. In this study, we demonstrated that MeCP2 was dynamically modified by O-linked-β-N-acetylglucosamine (O-GlcNAc) at threonine 203 (T203), an etiologic site in RTT patients. Disruption of the O-GlcNAcylation of MeCP2 specifically at T203 impaired dendrite development and spine maturation in cultured hippocampal neurons, and disrupted neuronal migration, dendritic spine morphogenesis, and caused dysfunction of synaptic transmission in the developing and juvenile mouse cerebral cortex. Mechanistically, genetic disruption of O-GlcNAcylation at T203 on MeCP2 decreased the neuronal activity-induced induction of Bdnf transcription. Our study highlights the critical role of MeCP2 T203 O-GlcNAcylation in neural development and synaptic transmission potentially via brain-derived neurotrophic factor.
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5
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Fujishima K, Kurisu J, Yamada M, Kengaku M. βIII spectrin controls the planarity of Purkinje cell dendrites by modulating perpendicular axon-dendrite interactions. Development 2020; 147:226102. [PMID: 33234719 DOI: 10.1242/dev.194530] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 11/04/2020] [Indexed: 01/14/2023]
Abstract
The mechanism underlying the geometrical patterning of axon and dendrite wiring remains elusive, despite its crucial importance in the formation of functional neural circuits. The cerebellar Purkinje cell (PC) arborizes a typical planar dendrite, which forms an orthogonal network with granule cell (GC) axons. By using electrospun nanofiber substrates, we reproduce the perpendicular contacts between PC dendrites and GC axons in culture. In the model system, PC dendrites show a preference to grow perpendicularly to aligned GC axons, which presumably contribute to the planar dendrite arborization in vivo We show that βIII spectrin, a causal protein for spinocerebellar ataxia type 5, is required for the biased growth of dendrites. βIII spectrin deficiency causes actin mislocalization and excessive microtubule invasion in dendritic protrusions, resulting in abnormally oriented branch formation. Furthermore, disease-associated mutations affect the ability of βIII spectrin to control dendrite orientation. These data indicate that βIII spectrin organizes the mouse dendritic cytoskeleton and thereby regulates the oriented growth of dendrites with respect to the afferent axons.
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Affiliation(s)
- Kazuto Fujishima
- Institute for Integrated Cell-Material Sciences (KUIAS-iCeMS), Kyoto University, Kyoto 606-8501, Japan
| | - Junko Kurisu
- Institute for Integrated Cell-Material Sciences (KUIAS-iCeMS), Kyoto University, Kyoto 606-8501, Japan
| | - Midori Yamada
- Institute for Integrated Cell-Material Sciences (KUIAS-iCeMS), Kyoto University, Kyoto 606-8501, Japan.,Graduate School of Biostudies, Kyoto University, Kyoto 606-8501, Japan
| | - Mineko Kengaku
- Institute for Integrated Cell-Material Sciences (KUIAS-iCeMS), Kyoto University, Kyoto 606-8501, Japan.,Graduate School of Biostudies, Kyoto University, Kyoto 606-8501, Japan
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6
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Kim JY, Hwang HG, Lee JY, Kim M, Kim JY. Cortactin deacetylation by HDAC6 and SIRT2 regulates neuronal migration and dendrite morphogenesis during cerebral cortex development. Mol Brain 2020; 13:105. [PMID: 32711564 PMCID: PMC7382832 DOI: 10.1186/s13041-020-00644-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 07/15/2020] [Indexed: 01/11/2023] Open
Abstract
Proper dendrite morphogenesis and neuronal migration are crucial for cerebral cortex development and neural circuit formation. In this study, we sought to determine if the histone deacetylase HDAC6 plays a role in dendrite development and neuronal migration of pyramidal neurons during cerebral cortex development. It was observed that knockdown of HDAC6 leads to defective dendrite morphogenesis and abnormal Golgi polarization in vitro, and the expression of wild type cortactin or deacetyl-mimetic cortactin 9KR rescued the defective phenotypes of the HDAC6 knockdown neurons. This suggests that HDAC6 promotes dendritic growth and Golgi polarization through cortactin deacetylation in vitro. We also demonstrated that ectopic expression of SIRT2, a cytoplasmic NAD+ − dependent deacetylase, suppresses the defects of HDAC6 knockdown neurons. These results indicate that HDAC6 and SIRT2 may be functionally redundant during dendrite development. Neurons transfected with both HDAC6 and SIRT2 shRNA or acetyl-mimetic cortactin 9KQ showed slow radial migration compared to the control cells during cerebral cortex development. Furthermore, a large portion of cortactin 9KQ-expressing pyramidal neurons at layer II/III in the cerebral cortex failed to form an apical dendrite toward the pial surface and had an increased number of primary dendrites, and the percentage of neurons with dendritic Golgi decreased in cortactin 9KQ-expressing cells, compared to control neurons. Taken together, this study suggests that HDAC6 and SIRT2 regulate neuronal migration and dendrite development through cortactin deacetylation in vivo.
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Affiliation(s)
- Ji-Ye Kim
- Department of Microbiology and Molecular Biology, Chungnam National University, Daejeon, South Korea
| | - Hee-Gon Hwang
- Department of Microbiology and Molecular Biology, Chungnam National University, Daejeon, South Korea
| | - Joo-Yong Lee
- Graduate School of Analytical Science and Technology (GRAST), Chungnam National University, Daejeon, South Korea
| | - Minkyu Kim
- Divison of Animal and Dairy Science, Chungnam National University, Daejeon, South Korea
| | - Jeong-Yoon Kim
- Department of Microbiology and Molecular Biology, Chungnam National University, Daejeon, South Korea.
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7
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Hörmann N, Schilling T, Ali AH, Serbe E, Mayer C, Borst A, Pujol-Martí J. A combinatorial code of transcription factors specifies subtypes of visual motion-sensing neurons in Drosophila. Development 2020; 147:223179. [PMID: 32238425 PMCID: PMC7240302 DOI: 10.1242/dev.186296] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 03/20/2020] [Indexed: 12/21/2022]
Abstract
Direction-selective T4/T5 neurons exist in four subtypes, each tuned to visual motion along one of the four cardinal directions. Along with their directional tuning, neurons of each T4/T5 subtype orient their dendrites and project their axons in a subtype-specific manner. Directional tuning, thus, appears strictly linked to morphology in T4/T5 neurons. How the four T4/T5 subtypes acquire their distinct morphologies during development remains largely unknown. Here, we investigated when and how the dendrites of the four T4/T5 subtypes acquire their specific orientations, and profiled the transcriptomes of all T4/T5 neurons during this process. This revealed a simple and stable combinatorial code of transcription factors defining the four T4/T5 subtypes during their development. Changing the combination of transcription factors of specific T4/T5 subtypes resulted in predictable and complete conversions of subtype-specific properties, i.e. dendrite orientation and matching axon projection pattern. Therefore, a combinatorial code of transcription factors coordinates the development of dendrite and axon morphologies to generate anatomical specializations that differentiate subtypes of T4/T5 motion-sensing neurons. Summary: Morphological and transcriptomic analyses allowed the identification of a combinatorial code of transcription factors that controls the development of subtype-specific morphologies in motion-detecting neurons of the Drosophila visual system.
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Affiliation(s)
- Nikolai Hörmann
- Department of Circuits - Computation - Models, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Tabea Schilling
- Department of Circuits - Computation - Models, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Aicha Haji Ali
- Department of Circuits - Computation - Models, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Etienne Serbe
- Department of Circuits - Computation - Models, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Christian Mayer
- Laboratory of Neurogenomics, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Alexander Borst
- Department of Circuits - Computation - Models, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Jesús Pujol-Martí
- Department of Circuits - Computation - Models, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
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8
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Sceniak MP, Fedder KN, Wang Q, Droubi S, Babcock K, Patwardhan S, Wright-Zornes J, Pham L, Sabo SL. An autism-associated mutation in GluN2B prevents NMDA receptor trafficking and interferes with dendrite growth. J Cell Sci 2019; 132:jcs.232892. [PMID: 31548203 DOI: 10.1242/jcs.232892] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 09/16/2019] [Indexed: 12/15/2022] Open
Abstract
Autism spectrum disorders (ASDs) are neurodevelopmental disorders with multiple genetic associations. Analysis of de novo mutations identified GRIN2B, which encodes the GluN2B subunit of NMDA receptors, as a gene linked to ASDs with high probability. However, the mechanisms by which GRIN2B mutations contribute to ASD pathophysiology are not understood. Here, we investigated the cellular phenotypes induced by a human mutation that is predicted to truncate GluN2B within the extracellular loop. This mutation abolished NMDA-dependent Ca2+ influx. Mutant GluN2B co-assembled with GluN1 but was not trafficked to the cell surface or dendrites. When mutant GluN2B was expressed in developing cortical neurons, dendrites appeared underdeveloped, with shorter and fewer branches, while spine density was unaffected. Mutant dendritic arbors were often dysmorphic, displaying abnormal filopodial-like structures. Interestingly, dendrite maldevelopment appeared when mutant GluN2B was expressed on a wild-type background, reflecting the disease given that individuals are heterozygous for GRIN2B mutations. Restoring the fourth transmembrane domain and cytoplasmic tail did not rescue the phenotypes. Finally, abnormal development was not accompanied by reduced mTOR signaling. These data suggest that mutations in GluN2B contribute to ASD pathogenesis by disrupting dendrite development.
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Affiliation(s)
- Michael P Sceniak
- Department of Biology, Central Michigan University, Mount Pleasant, MI 48859, USA
| | - Karlie N Fedder
- Departments of Pharmacology and Neuroscience, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Qian Wang
- Department of Biology, Central Michigan University, Mount Pleasant, MI 48859, USA
| | - Sammy Droubi
- Departments of Pharmacology and Neuroscience, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Katie Babcock
- Department of Biology, Central Michigan University, Mount Pleasant, MI 48859, USA
| | - Sagar Patwardhan
- Departments of Pharmacology and Neuroscience, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Jazmin Wright-Zornes
- Department of Biology, Central Michigan University, Mount Pleasant, MI 48859, USA
| | - Lucynda Pham
- Department of Biology, Central Michigan University, Mount Pleasant, MI 48859, USA
| | - Shasta L Sabo
- Department of Biology, Central Michigan University, Mount Pleasant, MI 48859, USA .,Departments of Pharmacology and Neuroscience, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
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9
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Hu Y, Hong XY, Yang XF, Ma RH, Wang X, Zhang JF, Feng Q, Li XG, Sun DS, Li X, Wan HL, Li T, Wang Q, Ke D, Wang JZ, Liu GP. Inflammation-dependent ISG15 upregulation mediates MIA-induced dendrite damages and depression by disrupting NEDD4/Rap2A signaling. Biochim Biophys Acta Mol Basis Dis 2019; 1865:1477-89. [PMID: 30826466 DOI: 10.1016/j.bbadis.2019.02.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 02/20/2019] [Accepted: 02/26/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND Maternal immune activation (MIA) is an independent risk factor for psychiatric disorders including depression spectrum in the offsprings, but the molecular mechanism is unclear. Recent studies show that interferon-stimulated gene-15 (ISG15) is involved in inflammation and neuronal dendrite development; here we studied the role of ISG15 in MIA-induced depression and the underlying mechanisms. METHODS By vena caudalis injecting polyinosinic: polycytidylic acid (poly I:C) into the pregnant rats to mimic MIA, we used AAV or lentivirus to introduce or silence ISG15 expression. Synaptic plasticity was detected by confocal microscope and Golgi staining. Cognitive performances of the offspring were measured by Open field, Forced swimming and Sucrose preference test. RESULTS We found that MIA induced depression-like behaviors with dendrite impairments in the offspring with ISG15 level increased in the offsprings' brain. Overexpressing ISG15 in the prefrontal cortex of neonatal cubs (P0) could mimic dendritic pathology and depressive like behaviors, while downregulating ISG15 rescued these abnormalities in the offsprings. Further studies demonstrated that MIA-induced upregulation of inflammatory cytokines promoted ISG15 expression in the offspring' brain which suppressed Rap2A ubiquitination via NEDD4 and thus induced Rap2A accumulation, while upregulating NEDD4 abolished ISG15-induced dendrite impairments. CONCLUSIONS These data reveal that MIA impedes offsprings' dendrite development and causes depressive like behaviors by upregulating ISG15 and suppressing NEDD4/Rap2A signaling. The current findings suggest that inhibiting ISG15 may be a promising intervention of MIA-induced psychiatric disorders in the offsprings.
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10
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O'Brien BMJ, Palumbos SD, Novakovic M, Shang X, Sundararajan L, Miller DM. Separate transcriptionally regulated pathways specify distinct classes of sister dendrites in a nociceptive neuron. Dev Biol 2017; 432:248-257. [PMID: 29031632 DOI: 10.1016/j.ydbio.2017.10.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 10/10/2017] [Accepted: 10/11/2017] [Indexed: 10/18/2022]
Abstract
The dendritic processes of nociceptive neurons transduce external signals into neurochemical cues that alert the organism to potentially damaging stimuli. The receptive field for each sensory neuron is defined by its dendritic arbor, but the mechanisms that shape dendritic architecture are incompletely understood. Using the model nociceptor, the PVD neuron in C. elegans, we determined that two types of PVD lateral branches project along the dorsal/ventral axis to generate the PVD dendritic arbor: (1) Pioneer dendrites that adhere to the epidermis, and (2) Commissural dendrites that fasciculate with circumferential motor neuron processes. Previous reports have shown that the LIM homeodomain transcription factor MEC-3 is required for all higher order PVD branching and that one of its targets, the claudin-like membrane protein HPO-30, preferentially promotes outgrowth of pioneer branches. Here, we show that another MEC-3 target, the conserved TFIIA-like zinc finger transcription factor EGL-46, adopts the alternative role of specifying commissural dendrites. The known EGL-46 binding partner, the TEAD transcription factor EGL-44, is also required for PVD commissural branch outgrowth. Double mutants of hpo-30 and egl-44 show strong enhancement of the lateral branching defect with decreased numbers of both pioneer and commissural dendrites. Thus, HPO-30/Claudin and EGL-46/EGL-44 function downstream of MEC-3 and in parallel acting pathways to direct outgrowth of two distinct classes of PVD dendritic branches.
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Affiliation(s)
| | | | | | - Xueying Shang
- Vanderbilt University, 3120 MRB III, Nashville, TN 37240-7935, USA.
| | | | - David M Miller
- Vanderbilt University, 3120 MRB III, Nashville, TN 37240-7935, USA.
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11
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Candemir E, Kollert L, Weißflog L, Geis M, Müller A, Post AM, O'Leary A, Harro J, Reif A, Freudenberg F. Interaction of NOS1AP with the NOS-I PDZ domain: Implications for schizophrenia-related alterations in dendritic morphology. Eur Neuropsychopharmacol 2016; 26:741-55. [PMID: 26861996 DOI: 10.1016/j.euroneuro.2016.01.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/23/2015] [Accepted: 01/23/2016] [Indexed: 12/19/2022]
Abstract
Schizophrenia involves morphological brain changes, including changes in synaptic plasticity and altered dendritic development. Amongst the most promising candidate molecules for schizophrenia are neuronal nitric oxide (NO) synthase (NOS-I, also known as nNOS) and its adapter protein NOS1AP (previously named CAPON). However, the precise molecular mechanisms by which NOS-I and NOS1AP affect disease pathology remain to be resolved. Interestingly, overexpression of NOS1AP affects dendritic morphology, possibly through increased association with the NOS-I PDZ domain. To investigate the effect of NOS1AP on dendritic morphology we overexpressed different NOS1AP isoforms, NOS1AP deletion mutants and the aminoterminal 133 amino acids of NOS-I (NOS-IN133) containing an extended PDZ domain. We examined the interaction of the overexpressed constructs with endogenous NOS-I by co-immunoprecipitation and the consequences of increased NOS-I/NOS1AP PDZ interaction in primary cultures of hippocampal and cortical neurons from C57BL/6J mice. Neurons overexpressing NOS1AP isoforms or deletion mutants showed highly altered spine morphology and excessive growth of filopodia-like protrusions. Sholl analysis of immunostained primary cultured neurons revealed that dendritic branching was mildly affected by NOS1AP overexpression. Our results hint towards an involvement of NOS-I/NOS1AP interaction in the regulation of dendritic spine plasticity. As altered dendritic spine development and filopodial outgrowth are important neuropathological features of schizophrenia, our findings may provide insight into part of the molecular mechanisms involved in brain morphology alterations observed in schizophrenia. As the NOS-I/NOS1AP interface can be targeted by small molecules, our findings ultimately might help to develop novel treatment strategies for schizophrenia patients.
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Affiliation(s)
- Esin Candemir
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital of Frankfurt, 60528 Frankfurt am Main, Germany; Department of Psychiatry, Psychosomatics, and Psychotherapy, University Hospital of Würzburg, 97080 Würzburg, Germany; Graduate School of Life Sciences, University of Würzburg, 97080 Würzburg, Germany
| | - Leonie Kollert
- Department of Psychiatry, Psychosomatics, and Psychotherapy, University Hospital of Würzburg, 97080 Würzburg, Germany
| | - Lena Weißflog
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital of Frankfurt, 60528 Frankfurt am Main, Germany; Department of Psychiatry, Psychosomatics, and Psychotherapy, University Hospital of Würzburg, 97080 Würzburg, Germany
| | - Maria Geis
- Department of Psychiatry, Psychosomatics, and Psychotherapy, University Hospital of Würzburg, 97080 Würzburg, Germany
| | - Antje Müller
- Department of Psychiatry, Psychosomatics, and Psychotherapy, University Hospital of Würzburg, 97080 Würzburg, Germany
| | - Antonia M Post
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital of Frankfurt, 60528 Frankfurt am Main, Germany; Department of Psychiatry, Psychosomatics, and Psychotherapy, University Hospital of Würzburg, 97080 Würzburg, Germany
| | - Aet O'Leary
- Department of Psychiatry, Psychosomatics, and Psychotherapy, University Hospital of Würzburg, 97080 Würzburg, Germany; Division of Neuropsychopharmacology, Department of Psychology, University of Tartu, Ravila 14A, Tartu 50411 Estonia
| | - Jaanus Harro
- Division of Neuropsychopharmacology, Department of Psychology, University of Tartu, Ravila 14A, Tartu 50411 Estonia
| | - Andreas Reif
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital of Frankfurt, 60528 Frankfurt am Main, Germany; Department of Psychiatry, Psychosomatics, and Psychotherapy, University Hospital of Würzburg, 97080 Würzburg, Germany
| | - Florian Freudenberg
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital of Frankfurt, 60528 Frankfurt am Main, Germany; Department of Psychiatry, Psychosomatics, and Psychotherapy, University Hospital of Würzburg, 97080 Würzburg, Germany.
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12
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Harraz MM, Xu JC, Guiberson N, Dawson TM, Dawson VL. MiR-223 regulates the differentiation of immature neurons. Mol Cell Ther 2014; 2:18. [PMID: 25400937 PMCID: PMC4229944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 05/28/2014] [Indexed: 11/21/2023]
Abstract
BACKGROUND Small non-coding microRNA RNA molecules can regulate stem cell function. The role of microRNAs in neural stem/progenitor cells (NS/PCs) differentiation is not entirely clear. METHODS MiRNA profiling, loss and gain of function studies coupled with dendritic tree development morphometric analysis and calcium influx imaging were utilized to investigate the role of micoRNA-223 in differentiating NS/PCs. RESULTS MiRNA profiling in human NS/PCs before and after differentiation in vitro reveals modulation of miRNAs following differentiation of NS/PCs. MiR-223, a microRNA well characterized as a hematopoietic-specific miRNA was identified. Cell-autonomous inhibition of miR-223 in the adult mouse dentate gyrus NS/PCs led to a significant increase in immature neurons soma size, dendritic tree total length, branch number per neuron and complexity, while neuronal migration in the dentate gyrus remained unaffected. Overexpression of miR-223 decreased dendritic tree total length, branch number and complexity in neurons differentiated from human embryonic stem cells (hESCs). Inhibition of miR-223 enhanced N-methyl-D-aspartate (NMDA) induced calcium influx in human neurons differentiated from NS/PCs. CONCLUSIONS Taken together, these findings indicate that miR-223 regulates the differentiation of neurons derived from NS/PCs.
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Affiliation(s)
- Maged M Harraz
- />Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205 USA
- />Department of Histology and Genetics, Suez Canal University School of Medicine, Ismailia, Egypt
| | - Jin-Chong Xu
- />Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, 733 North Broadway, BRB 731 21205 Baltimore, MD USA
- />Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205 USA
| | - Noah Guiberson
- />Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, 733 North Broadway, BRB 731 21205 Baltimore, MD USA
| | - Ted M Dawson
- />Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205 USA
- />Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, 733 North Broadway, BRB 731 21205 Baltimore, MD USA
- />Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205 USA
- />Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205 USA
| | - Valina L Dawson
- />Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205 USA
- />Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, 733 North Broadway, BRB 731 21205 Baltimore, MD USA
- />Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205 USA
- />Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD 21205 USA
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Abstract
The proper formation and morphogenesis of dendrites is fundamental to the establishment of neural circuits in the brain. Following cell cycle exit and migration, neurons undergo organized stages of dendrite morphogenesis, which include dendritic arbor growth and elaboration followed by retraction and pruning. Although these developmental stages were characterized over a century ago, molecular regulators of dendrite morphogenesis have only recently been defined. In particular, studies in Drosophila and mammalian neurons have identified numerous cell-intrinsic drivers of dendrite morphogenesis that include transcriptional regulators, cytoskeletal and motor proteins, secretory and endocytic pathways, cell cycle-regulated ubiquitin ligases, and components of other signaling cascades. Here, we review cell-intrinsic drivers of dendrite patterning and discuss how the characterization of such crucial regulators advances our understanding of normal brain development and pathogenesis of diverse cognitive disorders.
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Affiliation(s)
- Sidharth V Puram
- Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA
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14
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Abstract
Background Small non-coding microRNA RNA molecules can regulate stem cell function. The role of microRNAs in neural stem/progenitor cells (NS/PCs) differentiation is not entirely clear. Methods MiRNA profiling, loss and gain of function studies coupled with dendritic tree development morphometric analysis and calcium influx imaging were utilized to investigate the role of micoRNA-223 in differentiating NS/PCs. Results MiRNA profiling in human NS/PCs before and after differentiation in vitro reveals modulation of miRNAs following differentiation of NS/PCs. MiR-223, a microRNA well characterized as a hematopoietic-specific miRNA was identified. Cell-autonomous inhibition of miR-223 in the adult mouse dentate gyrus NS/PCs led to a significant increase in immature neurons soma size, dendritic tree total length, branch number per neuron and complexity, while neuronal migration in the dentate gyrus remained unaffected. Overexpression of miR-223 decreased dendritic tree total length, branch number and complexity in neurons differentiated from human embryonic stem cells (hESCs). Inhibition of miR-223 enhanced N-methyl-D-aspartate (NMDA) induced calcium influx in human neurons differentiated from NS/PCs. Conclusions Taken together, these findings indicate that miR-223 regulates the differentiation of neurons derived from NS/PCs. Electronic supplementary material The online version of this article (doi:10.1186/2052-8426-2-18) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Maged M Harraz
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA ; Department of Histology and Genetics, Suez Canal University School of Medicine, Ismailia, Egypt
| | - Jin-Chong Xu
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, 733 North Broadway, BRB 731 21205 Baltimore, MD, USA ; Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Noah Guiberson
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, 733 North Broadway, BRB 731 21205 Baltimore, MD, USA
| | - Ted M Dawson
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA ; Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, 733 North Broadway, BRB 731 21205 Baltimore, MD, USA ; Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA ; Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Valina L Dawson
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA ; Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, 733 North Broadway, BRB 731 21205 Baltimore, MD, USA ; Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA ; Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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Abstract
Cdk5 has been implicated in a multitude of processes in neuronal development, cell biology and physiology. These influence many neurological disorders, but the very breadth of Cdk5 effects has made it difficult to synthesize a coherent picture of the part played by this protein in health and disease. In this review, we focus on the roles of Cdk5 in neuronal function, particularly synaptic homeostasis, plasticity, neurotransmission, subcellular organization, and trafficking. We then discuss how disruption of these Cdk5 activities may initiate or exacerbate neural disorders. A recurring theme will be the sensitivity of Cdk5 sequelae to the precise biological context under consideration.
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Affiliation(s)
- Kristina A McLinden
- National Institute of Neurological Disorders and Stroke, USA ; National Human Genome Research Institute, USA
| | - Svetlana Trunova
- National Institute of Neurological Disorders and Stroke, USA ; National Human Genome Research Institute, USA
| | - Edward Giniger
- National Institute of Neurological Disorders and Stroke, USA ; National Human Genome Research Institute, USA
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