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Luo W, Egger M, Cruz-Ochoa N, Tse A, Maloveczky G, Tamás B, Lukacsovich D, Seng C, Amrein I, Lukacsovich T, Wolfer D, Földy C. Activation of feedforward wiring in adult hippocampal neurons by the basic-helix-loop-helix transcription factor Ascl4. PNAS NEXUS 2024; 3:pgae174. [PMID: 38711810 PMCID: PMC11071515 DOI: 10.1093/pnasnexus/pgae174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 04/17/2024] [Indexed: 05/08/2024]
Abstract
Although evidence indicates that the adult brain retains a considerable capacity for circuit formation, adult wiring has not been broadly considered and remains poorly understood. In this study, we investigate wiring activation in adult neurons. We show that the basic-helix-loop-helix transcription factor Ascl4 can induce wiring in different types of hippocampal neurons of adult mice. The new axons are mainly feedforward and reconfigure synaptic weights in the circuit. Mice with the Ascl4-induced circuits do not display signs of pathology and solve spatial problems equally well as controls. Our results demonstrate reprogrammed connectivity by a single transcriptional factor and provide insights into the regulation of brain wiring in adults.
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Affiliation(s)
- Wenshu Luo
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zürich, Zürich 8057, Switzerland
| | - Matteo Egger
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zürich, Zürich 8057, Switzerland
- Adaptive Brain Circuits in Development and Learning (AdaBD), University Research Priority Program (URPP), University of Zürich, Zürich 8057, Switzerland
| | - Natalia Cruz-Ochoa
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zürich, Zürich 8057, Switzerland
- Adaptive Brain Circuits in Development and Learning (AdaBD), University Research Priority Program (URPP), University of Zürich, Zürich 8057, Switzerland
| | - Alice Tse
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zürich, Zürich 8057, Switzerland
| | - Gyula Maloveczky
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zürich, Zürich 8057, Switzerland
| | - Bálint Tamás
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zürich, Zürich 8057, Switzerland
| | - David Lukacsovich
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zürich, Zürich 8057, Switzerland
| | - Charlotte Seng
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zürich, Zürich 8057, Switzerland
| | - Irmgard Amrein
- Institute of Anatomy, Faculty of Medicine, University of Zürich, Zürich 8057, Switzerland
| | - Tamás Lukacsovich
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zürich, Zürich 8057, Switzerland
| | - David Wolfer
- Institute of Anatomy, Faculty of Medicine, University of Zürich, Zürich 8057, Switzerland
- Institute of Human Movement Sciences and Sport, D-HEST, ETH Zürich, Zürich 8057, Switzerland
| | - Csaba Földy
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zürich, Zürich 8057, Switzerland
- Adaptive Brain Circuits in Development and Learning (AdaBD), University Research Priority Program (URPP), University of Zürich, Zürich 8057, Switzerland
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2
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Naren P, Samim KS, Tryphena KP, Vora LK, Srivastava S, Singh SB, Khatri DK. Microtubule acetylation dyshomeostasis in Parkinson's disease. Transl Neurodegener 2023; 12:20. [PMID: 37150812 PMCID: PMC10165769 DOI: 10.1186/s40035-023-00354-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 04/06/2023] [Indexed: 05/09/2023] Open
Abstract
The inter-neuronal communication occurring in extensively branched neuronal cells is achieved primarily through the microtubule (MT)-mediated axonal transport system. This mechanistically regulated system delivers cargos (proteins, mRNAs and organelles such as mitochondria) back and forth from the soma to the synapse. Motor proteins like kinesins and dynein mechanistically regulate polarized anterograde (from the soma to the synapse) and retrograde (from the synapse to the soma) commute of the cargos, respectively. Proficient axonal transport of such cargos is achieved by altering the microtubule stability via post-translational modifications (PTMs) of α- and β-tubulin heterodimers, core components constructing the MTs. Occurring within the lumen of MTs, K40 acetylation of α-tubulin via α-tubulin acetyl transferase and its subsequent deacetylation by HDAC6 and SIRT2 are widely scrutinized PTMs that make the MTs highly flexible, which in turn promotes their lifespan. The movement of various motor proteins, including kinesin-1 (responsible for axonal mitochondrial commute), is enhanced by this PTM, and dyshomeostasis of neuronal MT acetylation has been observed in a variety of neurodegenerative conditions, including Alzheimer's disease and Parkinson's disease (PD). PD is the second most common neurodegenerative condition and is closely associated with impaired MT dynamics and deregulated tubulin acetylation levels. Although the relationship between status of MT acetylation and progression of PD pathogenesis has become a chicken-and-egg question, our review aims to provide insights into the MT-mediated axonal commute of mitochondria and dyshomeostasis of MT acetylation in PD. The enzymatic regulators of MT acetylation along with their synthetic modulators have also been briefly explored. Moving towards a tubulin-based therapy that enhances MT acetylation could serve as a disease-modifying treatment in neurological conditions that lack it.
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Affiliation(s)
- Padmashri Naren
- Molecular and Cellular Neuroscience Lab, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, 500037, India
| | - Khan Sabiya Samim
- Molecular and Cellular Neuroscience Lab, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, 500037, India
| | - Kamatham Pushpa Tryphena
- Molecular and Cellular Neuroscience Lab, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, 500037, India
| | - Lalitkumar K Vora
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7BL, UK.
| | - Saurabh Srivastava
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, 500037, India.
| | - Shashi Bala Singh
- Molecular and Cellular Neuroscience Lab, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, 500037, India
| | - Dharmendra Kumar Khatri
- Molecular and Cellular Neuroscience Lab, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, 500037, India.
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Ba R, Yang L, Zhang B, Jiang P, Ding Z, Zhou X, Yang Z, Zhao C. FOXG1 drives transcriptomic networks to specify principal neuron subtypes during the development of the medial pallium. SCIENCE ADVANCES 2023; 9:eade2441. [PMID: 36791184 PMCID: PMC9931217 DOI: 10.1126/sciadv.ade2441] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
The medial pallium (MP) is the major forebrain region underlying learning and memory, spatial navigation, and emotion; however, the mechanisms underlying the specification of its principal neuron subtypes remain largely unexplored. Here, by postmitotic deletion of FOXG1 (a transcription factor linked to autism spectrum disorders and FOXG1 syndrome) and single-cell RNA sequencing of E17.5 MP in mice, we found that FOXG1 controls the specification of upper-layer retrosplenial cortical pyramidal neurons [RSC-PyNs (UL)], subiculum PyNs (SubC-PyNs), CA1-PyNs, CA3-PyNs, and dentate gyrus granule cells (DG-GCs) in the MP. We uncovered subtype-specific and subtype-shared FOXG1-regulated transcriptomic networks orchestrating MP neuron specification. We further demonstrated that FOXG1 transcriptionally represses Zbtb20, Prox1, and Epha4 to prevent CA3-PyN and DG-GC identities during the specification of RSC-PyNs (UL) and SubC-PyNs; FOXG1 directly activates Nr4a2 to promote SubC-PyN identity. We showed that TBR1, controlled by FOXG1 during CA1-PyN specification, was down-regulated. Thus, our study illuminates MP principal neuron subtype specification and related neuropathogenesis.
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Affiliation(s)
- Ru Ba
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China
| | - Lin Yang
- State Key Laboratory of Medical Neurobiology, Institutes of Brain Science, MOE Frontier Research Center for Brain Science, Fudan University, Shanghai 200032, P.R. China
| | - Baoshen Zhang
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China
| | - Pengfei Jiang
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China
| | - Zhipeng Ding
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China
| | - Xue Zhou
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China
| | - Zhengang Yang
- State Key Laboratory of Medical Neurobiology, Institutes of Brain Science, MOE Frontier Research Center for Brain Science, Fudan University, Shanghai 200032, P.R. China
| | - Chunjie Zhao
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing 210009, China
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4
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James SS, Englund M, Bottom R, Perez R, Conner KE, Huffman KJ, Wilson SP, Krubitzer LA. Comparing the development of cortex-wide gene expression patterns between two species in a common reference frame. Proc Natl Acad Sci U S A 2022; 119:e2113896119. [PMID: 36201538 PMCID: PMC9564327 DOI: 10.1073/pnas.2113896119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Accepted: 08/15/2022] [Indexed: 11/29/2022] Open
Abstract
Advances in sequencing techniques have made comparative studies of gene expression a current focus for understanding evolutionary and developmental processes. However, insights into the spatial expression of genes have been limited by a lack of robust methodology. To overcome this obstacle, we developed methods and software tools for quantifying and comparing tissue-wide spatial patterns of gene expression within and between species. Here, we compare cortex-wide expression of RZRβ and Id2 mRNA across early postnatal development in mice and voles. We show that patterns of RZRβ expression in neocortical layer 4 are highly conserved between species but develop rapidly in voles and much more gradually in mice, who show a marked expansion in the relative size of the putative primary visual area across the first postnatal week. Patterns of Id2 expression, by contrast, emerge in a dynamic and layer-specific sequence that is consistent between the two species. We suggest that these differences in the development of neocortical patterning reflect the independent evolution of brains, bodies, and sensory systems in the 35 million years since their last common ancestor.
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Affiliation(s)
- Sebastian S. James
- Department of Psychology, University of Sheffield, Sheffield S10 2TN, United Kingdom
| | - Mackenzie Englund
- Department of Psychology, University of California Davis, Davis, CA 95616
| | - Riley Bottom
- Department of Psychology, University of California Riverside, Riverside, CA 92521
| | - Roberto Perez
- Department of Psychology, University of California Riverside, Riverside, CA 92521
| | - Kathleen E. Conner
- Department of Psychology, University of California Riverside, Riverside, CA 92521
| | - Kelly J. Huffman
- Department of Psychology, University of California Riverside, Riverside, CA 92521
| | - Stuart P. Wilson
- Department of Psychology, University of Sheffield, Sheffield S10 2TN, United Kingdom
| | - Leah A. Krubitzer
- Department of Psychology, University of California Davis, Davis, CA 95616
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Seng C, Luo W, Földy C. Circuit formation in the adult brain. Eur J Neurosci 2022; 56:4187-4213. [PMID: 35724981 PMCID: PMC9546018 DOI: 10.1111/ejn.15742] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 06/08/2022] [Accepted: 06/09/2022] [Indexed: 11/30/2022]
Abstract
Neurons in the mammalian central nervous system display an enormous capacity for circuit formation during development but not later in life. In principle, new circuits could be also formed in adult brain, but the absence of the developmental milieu and the presence of growth inhibition and hundreds of working circuits are generally viewed as unsupportive for such a process. Here, we bring together evidence from different areas of neuroscience—such as neurological disorders, adult‐brain neurogenesis, innate behaviours, cell grafting, and in vivo cell reprogramming—which demonstrates robust circuit formation in adult brain. In some cases, adult‐brain rewiring is ongoing and required for certain types of behaviour and memory, while other cases show significant promise for brain repair in disease models. Together, these examples highlight that the adult brain has higher capacity for structural plasticity than previously recognized. Understanding the underlying mechanisms behind this retained plasticity has the potential to advance basic knowledge regarding the molecular organization of synaptic circuits and could herald a new era of neural circuit engineering for therapeutic repair.
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Affiliation(s)
- Charlotte Seng
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zurich, Zürich, Switzerland
| | - Wenshu Luo
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zurich, Zürich, Switzerland
| | - Csaba Földy
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zurich, Zürich, Switzerland
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Bottom RT, Kozanian OO, Rohac DJ, Erickson MA, Huffman KJ. Transgenerational Effects of Prenatal Ethanol Exposure in Prepubescent Mice. Front Cell Dev Biol 2022; 10:812429. [PMID: 35386207 PMCID: PMC8978834 DOI: 10.3389/fcell.2022.812429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 01/28/2022] [Indexed: 12/11/2022] Open
Abstract
Background: Fetal alcohol spectrum disorders (FASD) represent a leading cause of non-genetic neuropathologies. Recent preclinical evidence from suggests that prenatal ethanol exposure (PrEE), like other environmental exposures, may have a significant, transgenerational impact on the offspring of directly exposed animals, including altered neocortical development at birth and behavior in peri-pubescent mice. How these adverse behavioral outcomes are manifested within the brain at the time of behavioral disruption remains unknown. Methods: A transgenerational mouse model of FASD was used to generate up to a third filial generation of offspring to study. Using a multi-modal battery of behavioral assays, we assessed motor coordination/function, sensorimotor processing, risk-taking behavior, and depressive-like behavior in postnatal day (P) 20 pre-pubescent mice. Additionally, sensory neocortical area connectivity using dye tracing, neocortical gene expression using in situ RNA hybridization, and spine density of spiny stellate cells in the somatosensory cortex using Golgi-Cox staining were examined in mice at P20. Results: We found that PrEE induces behavioral abnormalities including abnormal sensorimotor processing, increased risk-taking behavior, and increased depressive-like behaviors that extend to the F3 generation in 20-day old mice. Assessment of both somatosensory and visual cortical connectivity, as well as cortical RZRβ expression in pre-pubescent mice yielded no significant differences among any experimental generations. In contrast, only directly-exposed F1 mice displayed altered cortical expression of Id2 and decreased spine density among layer IV spiny stellate cells in somatosensory cortex at this pre-pubescent, post weaning age. Conclusion: Our results suggest that robust, clinically-relevant behavioral abnormalities are passed transgenerationally to the offspring of mice directly exposed to prenatal ethanol. Additionally, in contrast to our previous findings in the newborn PrEE mouse, a lack of transgenerational findings within the brain at this later age illuminates the critical need for future studies to attempt to discover the link between neurological function and the described behavioral changes. Overall, our study suggests that multi-generational effects of PrEE may have a substantial impact on human behavior as well as health and well-being and that these effects likely extend beyond early childhood.
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Affiliation(s)
- Riley T Bottom
- Interdepartmental Neuroscience Program, University of California, Riverside, Riverside, CA, United States
| | - Olga O Kozanian
- Department of Psychology, University of California, Riverside, Riverside, CA, United States
| | - David J Rohac
- Department of Psychology, University of California, Riverside, Riverside, CA, United States
| | - Michael A Erickson
- Department of Psychology, University of California, Riverside, Riverside, CA, United States
| | - Kelly J Huffman
- Interdepartmental Neuroscience Program, University of California, Riverside, Riverside, CA, United States.,Department of Psychology, University of California, Riverside, Riverside, CA, United States
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7
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Leng S, Zhang X, Li X, Wang S, Peng J. Lineage tracing reveals the dynamic contribution of Id2+ progenitor cells to branching morphogenesis. Stem Cells Dev 2022; 31:67-77. [PMID: 35018833 DOI: 10.1089/scd.2021.0135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
Branching morphogenesis is an important process in shaping the arborized structures of several organs. However, the driving force that directs this process from progenitor pools remains incompletely understood. In this lineage tracing study, we investigated the role of Id2+ embryonic progenitor cells in branching organs such as the pancreas, kidney, mammary gland, thyroid gland, and salivary gland. We found that a subset of Id2+ distal progenitor cells in the embryonic pancreas and kidney can give rise to multiple lineages of progeny cells during branching morphogenesis. Id2-labelled cells also supported the postnatal development of the mammary glands. However, Id2+ cells did not contribute to the development of the salivary and thyroid glands. We found the Id2+ cells located in the tip progenitor pools of pancreas and kidney have self-renewal potential and contribute descendents to multiple epithelial cell lineages. Our findings enrich the current model of distal progenitor pools driving branching morphogenesis and provide a new marker to investigate the regularity of branching in these organs.
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Affiliation(s)
- Shaoqiu Leng
- Shandong University Qilu Hospital, 91623, Department of Hematology, Jinan, China, 250012;
| | - Xiaoyu Zhang
- Shandong University Qilu Hospital, 91623, Department of Hematology, Jinan, China;
| | - Xin Li
- Shandong University Qilu Hospital, 91623, Jinan, China, 250012;
| | - Shuwen Wang
- Shandong University Qilu Hospital, 91623, Department of Hematology, Jinan, China, 250012;
| | - Jun Peng
- Shandong University Qilu Hospital, 91623, Department of Hematology, Jinan, Shandong, China.,Shandong University Qilu Hospital, 91623, Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Jinan, Shandong, China;
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8
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Recurrent rewiring of the adult hippocampal mossy fiber system by a single transcriptional regulator, Id2. Proc Natl Acad Sci U S A 2021; 118:2108239118. [PMID: 34599103 PMCID: PMC8501755 DOI: 10.1073/pnas.2108239118] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/05/2021] [Indexed: 12/03/2022] Open
Abstract
Neurons have an exceptional capacity to grow axons and form synaptic circuits during development but not later life. In adults, the lack of circuit formation may support retention of skilled actions and memories but also limits regeneration and repair after injuries and in disorders. Research on developing and damaged neurons has revealed many molecules that help circuit formation and regeneration, and yet factors that could induce axon growth and synapse formation in adult brain neurons remain elusive. Here, we searched for such key molecules and find one that alone can induce complete circuit formation. After engineering a new circuit in adult mice, we also looked into its function and relevance for memories. Circuit formation in the central nervous system has been historically studied during development, after which cell-autonomous and nonautonomous wiring factors inactivate. In principle, balanced reactivation of such factors could enable further wiring in adults, but their relative contributions may be circuit dependent and are largely unknown. Here, we investigated hippocampal mossy fiber sprouting to gain insight into wiring mechanisms in mature circuits. We found that sole ectopic expression of Id2 in granule cells is capable of driving mossy fiber sprouting in healthy adult mouse and rat. Mice with the new mossy fiber circuit solved spatial problems equally well as controls but appeared to rely on local rather than global spatial cues. Our results demonstrate reprogrammed connectivity in mature neurons by one defined factor and an assembly of a new synaptic circuit in adult brain.
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Wei GZ, Martin KA, Xing PY, Agrawal R, Whiley L, Wood TK, Hejndorf S, Ng YZ, Low JZY, Rossant J, Nechanitzky R, Holmes E, Nicholson JK, Tan EK, Matthews PM, Pettersson S. Tryptophan-metabolizing gut microbes regulate adult neurogenesis via the aryl hydrocarbon receptor. Proc Natl Acad Sci U S A 2021; 118:e2021091118. [PMID: 34210797 PMCID: PMC8271728 DOI: 10.1073/pnas.2021091118] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
While modulatory effects of gut microbes on neurological phenotypes have been reported, the mechanisms remain largely unknown. Here, we demonstrate that indole, a tryptophan metabolite produced by tryptophanase-expressing gut microbes, elicits neurogenic effects in the adult mouse hippocampus. Neurogenesis is reduced in germ-free (GF) mice and in GF mice monocolonized with a single-gene tnaA knockout (KO) mutant Escherichia coli unable to produce indole. External administration of systemic indole increases adult neurogenesis in the dentate gyrus in these mouse models and in specific pathogen-free (SPF) control mice. Indole-treated mice display elevated synaptic markers postsynaptic density protein 95 and synaptophysin, suggesting synaptic maturation effects in vivo. By contrast, neurogenesis is not induced by indole in aryl hydrocarbon receptor KO (AhR-/-) mice or in ex vivo neurospheres derived from them. Neural progenitor cells exposed to indole exit the cell cycle, terminally differentiate, and mature into neurons that display longer and more branched neurites. These effects are not observed with kynurenine, another AhR ligand. The indole-AhR-mediated signaling pathway elevated the expression of β-catenin, Neurog2, and VEGF-α genes, thus identifying a molecular pathway connecting gut microbiota composition and their metabolic function to neurogenesis in the adult hippocampus. Our data have implications for the understanding of mechanisms of brain aging and for potential next-generation therapeutic opportunities.
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Affiliation(s)
- George Zhang Wei
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 636921
- National Neuroscience Institute, Singapore 169857
| | - Katherine A Martin
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 636921
- National Neuroscience Institute, Singapore 169857
| | - Peter Yuli Xing
- The Singapore Centre for Environmental Life Sciences Engineering, School of Biological Sciences, Nanyang Technological University, Singapore 637551
- Interdisciplinary Graduate School, Nanyang Technological University, Singapore 637335
| | - Ruchi Agrawal
- The Singapore Centre for Environmental Life Sciences Engineering, School of Biological Sciences, Nanyang Technological University, Singapore 637551
| | - Luke Whiley
- Australian National Phenome Centre, Health Futures Institute, Murdoch University, Perth WA 6150, Australia
- Perron Institute for Neurological and Translational Science, Nedlands WA 6009, Australia
| | - Thomas K Wood
- Department of Chemical Engineering, Pennsylvania State University, University Park, PA 16802
| | - Sophia Hejndorf
- Department of Neurobiology, Care and Society, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Yong Zhi Ng
- The School of Biological Sciences, Nanyang Technological University, Singapore 637551
| | - Jeremy Zhi Yan Low
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 636921
| | - Janet Rossant
- Program in Developmental and Stem Cell Biology, Peter Gilgan Centre for Research and Learning, Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
| | - Robert Nechanitzky
- Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, ON M5G 2C1, Canada
| | - Elaine Holmes
- Australian National Phenome Centre, Health Futures Institute, Murdoch University, Perth WA 6150, Australia
- Section for Nutrition Research, Imperial College London, London SW7 2AZ, United Kingdom
| | - Jeremy K Nicholson
- Australian National Phenome Centre, Health Futures Institute, Murdoch University, Perth WA 6150, Australia
- Institute of Global Health Innovation, Imperial College London, London SW7 2NA, United Kingdom
| | - Eng-King Tan
- National Neuroscience Institute, Singapore 169857
| | - Paul M Matthews
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 636921
- UK Dementia Research Institute, Imperial College London, London SW7 2AZ, United Kingdom
- Department of Surgery and Cancer, Imperial College London, London SW7 2AZ, United Kingdom
- Department of Brain Sciences, Imperial College London, London W12 0NN, United Kingdom
| | - Sven Pettersson
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 636921;
- National Neuroscience Institute, Singapore 169857
- Department of Neurobiology, Care and Society, Karolinska Institutet, 171 77 Stockholm, Sweden
- Faculty of Medical Sciences, Sunway University, 47500 Kuala Lumpur, Malaysia
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10
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Huang ZH, Feng AY, Liu J, Zhou L, Zhou B, Yu P. Inhibitor of DNA binding 2 accelerates nerve regeneration after sciatic nerve injury in mice. Neural Regen Res 2021; 16:2542-2548. [PMID: 33907046 PMCID: PMC8374553 DOI: 10.4103/1673-5374.313054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Inhibitor of DNA binding 2 (Id2) can promote axonal regeneration after injury of the central nervous system. However, whether Id2 can promote axonal regeneration and functional recovery after peripheral nerve injury is currently unknown. In this study, we established a mouse model of bilateral sciatic nerve crush injury. Two weeks before injury, AAV9-Id2-3×Flag-GFP was injected stereotaxically into the bilateral ventral horn of lumbar spinal cord. Our results showed that Id2 was successfully delivered into spinal cord motor neurons projecting to the sciatic nerve, and the number of regenerated motor axons in the sciatic nerve distal to the crush site was increased at 2 weeks after injury, arriving at the tibial nerve and reinnervating a few endplates in the gastrocnemius muscle. By 1 month after injury, extensive neuromuscular reinnervation occurred. In addition, the amplitude of compound muscle action potentials of the gastrocnemius muscle was markedly recovered, and their latency was shortened. These findings suggest that Id2 can accelerate axonal regeneration, promote neuromuscular reinnervation, and enhance functional improvement following sciatic nerve injury. Therefore, elevating the level of Id2 in adult neurons may present a promising strategy for peripheral nerve repair following injury. The study was approved by the Experimental Animal Ethics Committee of Jinan University (approval No. 20160302003) on March 2, 2016.
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Affiliation(s)
- Zhong-Hai Huang
- Guangdong-Hong Kong-Macau Institute of Central Nervous System Regeneration; Ministry of Education Joint International Research Laboratory of Central Nervous System Regeneration, Jinan University, Guangzhou, Guangdong Province, China
| | - Ai-Ying Feng
- Guangdong-Hong Kong-Macau Institute of Central Nervous System Regeneration; Ministry of Education Joint International Research Laboratory of Central Nervous System Regeneration, Jinan University, Guangzhou, Guangdong Province, China
| | - Jing Liu
- Guangdong-Hong Kong-Macau Institute of Central Nervous System Regeneration; Ministry of Education Joint International Research Laboratory of Central Nervous System Regeneration, Jinan University, Guangzhou, Guangdong Province, China
| | - Libing Zhou
- Guangdong-Hong Kong-Macau Institute of Central Nervous System Regeneration; Ministry of Education Joint International Research Laboratory of Central Nervous System Regeneration, Jinan University, Guangzhou, Guangdong Province, China
| | - Bing Zhou
- Interdisciplinary Innovation Institute of Medicine and Engineering, Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang University, Beijing, China
| | - Panpan Yu
- Guangdong-Hong Kong-Macau Institute of Central Nervous System Regeneration; Ministry of Education Joint International Research Laboratory of Central Nervous System Regeneration, Jinan University, Guangzhou, Guangdong Province, China
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Bottom RT, Abbott CW, Huffman KJ. Rescue of ethanol-induced FASD-like phenotypes via prenatal co-administration of choline. Neuropharmacology 2020; 168:107990. [PMID: 32044264 DOI: 10.1016/j.neuropharm.2020.107990] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 01/22/2020] [Accepted: 02/04/2020] [Indexed: 10/25/2022]
Abstract
Maternal consumption of alcohol during pregnancy can generate a multitude of deficits in the offspring. Fetal Alcohol Spectrum Disorders, or FASD, describe a palette of potentially life-long phenotypes that result from exposure to ethanol during human gestation. There is no cure for FASD and cognitive-behavioral therapies typically have low success rates, especially in severe cases. The neocortex, responsible for complex cognitive and behavioral function, is altered by prenatal ethanol exposure (PrEE). Supplementation with choline, an essential nutrient, during the prenatal ethanol insult has been associated with a reduction of negative outcomes associated with PrEE. However, choline's ability to prevent deficits within the developing neocortex, as well as the underlying mechanisms, remain unclear. Here, we exposed pregnant mice to 25% ethanol in addition to a 642 mg/L choline chloride supplement throughout gestation to determine the impact of choline supplementation on neocortical and behavioral development in ethanol-exposed offspring. We found that concurrent choline supplementation prevented gross developmental abnormalities associated with PrEE including reduced body weight, brain weight, and cortical length as well as partially ameliorated PrEE-induced abnormalities in intraneocortical circuitry. Additionally, choline supplementation prevented altered expression of RZRβ and Id2, two genes implicated in postmitotic patterning of neocortex, and global DNA hypomethylation within developing neocortex. Lastly, choline supplementation prevented sensorimotor behavioral dysfunction and partially ameliorated increased anxiety-like behavior observed in PrEE mice, as assessed by the Suok and Ledge tests. Our results suggest that choline supplementation may represent a potent preventative measure for the adverse outcomes associated with PrEE.
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Affiliation(s)
- Riley T Bottom
- Interdepartmental Neuroscience Program, University of California, Riverside, 900 University Ave., Riverside, CA, 92521, USA
| | - Charles W Abbott
- Interdepartmental Neuroscience Program, University of California, Riverside, 900 University Ave., Riverside, CA, 92521, USA
| | - Kelly J Huffman
- Interdepartmental Neuroscience Program, University of California, Riverside, 900 University Ave., Riverside, CA, 92521, USA; Dept. of Psychology, University of California, Riverside; 900 University Ave., Riverside, CA, 92521, USA.
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Bottom RT, Krubitzer LA, Huffman KJ. Early postnatal gene expression in the developing neocortex of prairie voles (Microtus ochrogaster) is related to parental rearing style. J Comp Neurol 2020; 528:3008-3022. [PMID: 31930725 DOI: 10.1002/cne.24856] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 01/08/2020] [Accepted: 01/09/2020] [Indexed: 11/10/2022]
Abstract
The earliest and most prevalent sensory experience includes tactile, thermal, and olfactory stimulation delivered to the young via contact with the mother, and in some mammals, the father. Prairie voles (Microtus ochrogaster), like humans, are biparental and serve as a model for understanding the impact of parent/offspring interactions on the developing brain. Prairie voles also exhibit natural variation in the level of tactile stimulation delivered by the parents to the offspring, and this has been well documented and quantified. Previous studies revealed that adult prairie vole offspring who received either high (HC) or low (LC) tactile contact from their parents have differences in the size of cortical fields and the connections of somatosensory cortex. In the current investigation, we examined gene expression, intraneocortical connectivity, and cortical thickness in newborn voles to appreciate when differences in HC and LC offspring begin to emerge. We observed differences in developmentally regulated genes, as well as variation in prelimbic and anterior cingulate cortical thickness at postnatal Day 1 (P1) in HC and LC voles. Results from this study suggest that parenting styles, such as those involving high or low physical contact, impact the developing neocortex via very early sensory experience as well as differences in epigenetic modifications that may emerge in HC and LC voles.
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Affiliation(s)
- Riley T Bottom
- Interdepartmental Neuroscience Program, University of California, Riverside, Riverside, California
| | - Leah A Krubitzer
- Center for Neuroscience, University of California, Davis, Davis, California.,Department of Psychology, University of California, Davis, Davis, California
| | - Kelly J Huffman
- Interdepartmental Neuroscience Program, University of California, Riverside, Riverside, California.,Department of Psychology, University of California, Riverside, Riverside, California
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