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Gillespie B, Dunn A, Sundram S, Hill RA. Investigating 7,8-Dihydroxyflavone to combat maternal immune activation effects on offspring gene expression and behaviour. Prog Neuropsychopharmacol Biol Psychiatry 2024; 134:111078. [PMID: 38950841 DOI: 10.1016/j.pnpbp.2024.111078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 06/25/2024] [Accepted: 06/26/2024] [Indexed: 07/03/2024]
Abstract
Infection during pregnancy is a substantial risk factor for the unborn child to develop autism or schizophrenia later in life, and is thought to be driven by maternal immune activation (MIA). MIA can be modelled by exposing pregnant mice to Polyinosinic: polycytidylic acid (Poly-I:C), a viral mimetic that induces an immune response and recapitulates in the offspring many neurochemical features of ASD and schizophrenia, including altered BDNF-TrkB signalling and disruptions to excitatory/inhibitory balance. Therefore, we hypothesised that a BDNF mimetic, 7,8-Dihydroxyflavone (7,8-DHF), administered prophylactically to the dam may prevent the neurobehavioural sequelae of disruptions induced by MIA. Dams were treated with 7,8-DHF in the drinking water (0.08 mg/ML) from gestational day (GD) 9-20 and were exposed to Poly-I:C at GD17 (20 mg/kg, i.p.). Foetal brains were collected 6 h post Poly-I:C exposure for RT-qPCR analysis of BDNF, cytokine, GABAergic and glutamatergic gene targets. A second adult cohort were tested in a battery of behavioural tests relevant to schizophrenia and the prefrontal cortex and ventral hippocampus dissected for RT-qPCR analysis. Foetal brains exposed to Poly-I:C showed increased IL-6, but reduced expression of Ntrk2 and multiple GABAergic and glutamatergic markers. Anxiety-like behaviour was observed in adult offspring prenatally exposed to poly-I:C, which was accompanied by altered expression of Gria2 in the prefrontal cortex and Gria4 in the ventral hippocampus. While 7-8 DHF normalised the expression of some glutamatergic (Grm5) and GABAergic (Gabra1) genes in Poly-I:C exposed offspring, it also led to substantial alterations in offspring not exposed to Poly-I:C. Furthermore, mice exposed to 7,8-DHF prenatally showed increased pre-pulse inhibition and reduced working memory in adulthood. These data advance understanding of how 7,8-DHF and MIA prenatal exposure impacts genes critical to excitatory/inhibitory pathways and related behaviour.
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Affiliation(s)
- Brendan Gillespie
- Department of Psychiatry, Monash University, Clayton, VIC 3168, Australia
| | - Ariel Dunn
- Department of Psychiatry, Monash University, Clayton, VIC 3168, Australia
| | - Suresh Sundram
- Department of Psychiatry, Monash University, Clayton, VIC 3168, Australia
| | - Rachel A Hill
- Department of Psychiatry, Monash University, Clayton, VIC 3168, Australia.
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2
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Sullivan PF, Yao S, Hjerling-Leffler J. Schizophrenia genomics: genetic complexity and functional insights. Nat Rev Neurosci 2024:10.1038/s41583-024-00837-7. [PMID: 39030273 DOI: 10.1038/s41583-024-00837-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/04/2024] [Indexed: 07/21/2024]
Abstract
Determining the causes of schizophrenia has been a notoriously intractable problem, resistant to a multitude of investigative approaches over centuries. In recent decades, genomic studies have delivered hundreds of robust findings that implicate nearly 300 common genetic variants (via genome-wide association studies) and more than 20 rare variants (via whole-exome sequencing and copy number variant studies) as risk factors for schizophrenia. In parallel, functional genomic and neurobiological studies have provided exceptionally detailed information about the cellular composition of the brain and its interconnections in neurotypical individuals and, increasingly, in those with schizophrenia. Taken together, these results suggest unexpected complexity in the mechanisms that drive schizophrenia, pointing to the involvement of ensembles of genes (polygenicity) rather than single-gene causation. In this Review, we describe what we now know about the genetics of schizophrenia and consider the neurobiological implications of this information.
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Affiliation(s)
- Patrick F Sullivan
- Department of Genetics, University of North Carolina, Chapel Hill, NC, USA.
- Department of Psychiatry, University of North Carolina, Chapel Hill, NC, USA.
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
| | - Shuyang Yao
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Jens Hjerling-Leffler
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden.
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3
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Bodea GO, Botto JM, Ferreiro ME, Sanchez-Luque FJ, de Los Rios Barreda J, Rasmussen J, Rahman MA, Fenlon LR, Jansz N, Gubert C, Gerdes P, Bodea LG, Ajjikuttira P, Da Costa Guevara DJ, Cumner L, Bell CC, Kozulin P, Billon V, Morell S, Kempen MJHC, Love CJ, Saha K, Palmer LM, Ewing AD, Jhaveri DJ, Richardson SR, Hannan AJ, Faulkner GJ. LINE-1 retrotransposons contribute to mouse PV interneuron development. Nat Neurosci 2024; 27:1274-1284. [PMID: 38773348 PMCID: PMC11239520 DOI: 10.1038/s41593-024-01650-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 04/14/2024] [Indexed: 05/23/2024]
Abstract
Retrotransposons are mobile DNA sequences duplicated via transcription and reverse transcription of an RNA intermediate. Cis-regulatory elements encoded by retrotransposons can also promote the transcription of adjacent genes. Somatic LINE-1 (L1) retrotransposon insertions have been detected in mammalian neurons. It is, however, unclear whether L1 sequences are mobile in only some neuronal lineages or therein promote neurodevelopmental gene expression. Here we report programmed L1 activation by SOX6, a transcription factor critical for parvalbumin (PV) interneuron development. Mouse PV interneurons permit L1 mobilization in vitro and in vivo, harbor unmethylated L1 promoters and express full-length L1 mRNAs and proteins. Using nanopore long-read sequencing, we identify unmethylated L1s proximal to PV interneuron genes, including a novel L1 promoter-driven Caps2 transcript isoform that enhances neuron morphological complexity in vitro. These data highlight the contribution made by L1 cis-regulatory elements to PV interneuron development and transcriptome diversity, uncovered due to L1 mobility in this milieu.
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Affiliation(s)
- Gabriela O Bodea
- Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia.
- Mater Research Institute - University of Queensland, TRI Building, Woolloongabba, Queensland, Australia.
| | - Juan M Botto
- Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia
| | - Maria E Ferreiro
- Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia
| | - Francisco J Sanchez-Luque
- Institute of Parasitology and Biomedicine 'López-Neyra', Spanish National Research Council, Granada, Spain
| | | | - Jay Rasmussen
- Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia
| | - Muhammed A Rahman
- Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia
| | - Laura R Fenlon
- Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia
| | - Natasha Jansz
- Mater Research Institute - University of Queensland, TRI Building, Woolloongabba, Queensland, Australia
| | - Carolina Gubert
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, Australia
| | - Patricia Gerdes
- Mater Research Institute - University of Queensland, TRI Building, Woolloongabba, Queensland, Australia
| | - Liviu-Gabriel Bodea
- Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia
| | - Prabha Ajjikuttira
- Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia
| | - Darwin J Da Costa Guevara
- Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia
- Mater Research Institute - University of Queensland, TRI Building, Woolloongabba, Queensland, Australia
| | - Linda Cumner
- Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia
| | - Charles C Bell
- Mater Research Institute - University of Queensland, TRI Building, Woolloongabba, Queensland, Australia
| | - Peter Kozulin
- Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia
| | - Victor Billon
- Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia
- Biology Department, École Normale Supérieure Paris-Saclay, Gif-sur-Yvette, France
| | - Santiago Morell
- Mater Research Institute - University of Queensland, TRI Building, Woolloongabba, Queensland, Australia
- Department of Genetics, University of Cambridge, Cambridge, UK
| | - Marie-Jeanne H C Kempen
- MRC Human Genetics Unit, Institute of Genetics and Cancer, University of Edinburgh, Western General Hospital, Edinburgh, UK
| | - Chloe J Love
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, Australia
| | - Karabi Saha
- Department of Pharmaceutical Sciences, South Dakota State University, Brookings, SD, USA
| | - Lucy M Palmer
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, Australia
- Florey Department of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, Australia
| | - Adam D Ewing
- Mater Research Institute - University of Queensland, TRI Building, Woolloongabba, Queensland, Australia
| | - Dhanisha J Jhaveri
- Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia
- Mater Research Institute - University of Queensland, TRI Building, Woolloongabba, Queensland, Australia
| | - Sandra R Richardson
- Mater Research Institute - University of Queensland, TRI Building, Woolloongabba, Queensland, Australia
| | - Anthony J Hannan
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, Australia
| | - Geoffrey J Faulkner
- Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia.
- Mater Research Institute - University of Queensland, TRI Building, Woolloongabba, Queensland, Australia.
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4
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Zhao Y, Deng W, Wang Z, Wang Y, Zheng H, Zhou K, Xu Q, Bai L, Liu H, Ren Z, Jiang Z. Genetics of congenital heart disease. Clin Chim Acta 2024; 552:117683. [PMID: 38030030 DOI: 10.1016/j.cca.2023.117683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/22/2023] [Accepted: 11/24/2023] [Indexed: 12/01/2023]
Abstract
During embryonic development, the cardiovascular system and the central nervous system exhibit a coordinated developmental process through intricate interactions. Congenital heart disease (CHD) refers to structural or functional abnormalities that occur during embryonic or prenatal heart development and is the most common congenital disorder. One of the most common complications in CHD patients is neurodevelopmental disorders (NDD). However, the specific mechanisms, connections, and precise ways in which CHD co-occurs with NDD remain unclear. According to relevant research, both genetic and non-genetic factors are significant contributors to the co-occurrence of sporadic CHD and NDD. Genetic variations, such as chromosomal abnormalities and gene mutations, play a role in the susceptibility to both CHD and NDD. Further research should aim to identify common molecular mechanisms that underlie the co-occurrence of CHD and NDD, possibly originating from shared genetic mutations or shared gene regulation. Therefore, this review article summarizes the current advances in the genetics of CHD co-occurring with NDD, elucidating the application of relevant gene detection techniques. This is done with the aim of exploring the genetic regulatory mechanisms of CHD co-occurring with NDD at the gene level and promoting research and treatment of developmental disorders related to the cardiovascular and central nervous systems.
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Affiliation(s)
- Yuanqin Zhao
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, International Joint Laboratory for Arteriosclerotic Disease Research of Hunan Province, University of South China, Hengyang 421001, China.
| | - Wei Deng
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, International Joint Laboratory for Arteriosclerotic Disease Research of Hunan Province, University of South China, Hengyang 421001, China.
| | - Zhaoyue Wang
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, International Joint Laboratory for Arteriosclerotic Disease Research of Hunan Province, University of South China, Hengyang 421001, China.
| | - Yanxia Wang
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, International Joint Laboratory for Arteriosclerotic Disease Research of Hunan Province, University of South China, Hengyang 421001, China.
| | - Hongyu Zheng
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, International Joint Laboratory for Arteriosclerotic Disease Research of Hunan Province, University of South China, Hengyang 421001, China.
| | - Kun Zhou
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, International Joint Laboratory for Arteriosclerotic Disease Research of Hunan Province, University of South China, Hengyang 421001, China.
| | - Qian Xu
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, International Joint Laboratory for Arteriosclerotic Disease Research of Hunan Province, University of South China, Hengyang 421001, China.
| | - Le Bai
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, International Joint Laboratory for Arteriosclerotic Disease Research of Hunan Province, University of South China, Hengyang 421001, China.
| | - Huiting Liu
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, International Joint Laboratory for Arteriosclerotic Disease Research of Hunan Province, University of South China, Hengyang 421001, China.
| | - Zhong Ren
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, International Joint Laboratory for Arteriosclerotic Disease Research of Hunan Province, University of South China, Hengyang 421001, China.
| | - Zhisheng Jiang
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, International Joint Laboratory for Arteriosclerotic Disease Research of Hunan Province, University of South China, Hengyang 421001, China.
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5
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Gonda S, Riedel C, Reiner A, Köhler I, Wahle P. Axons of cortical basket cells originating from dendrites develop higher local complexity than axons emerging from basket cell somata. Development 2023; 150:dev202305. [PMID: 37902086 PMCID: PMC10690106 DOI: 10.1242/dev.202305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 10/24/2023] [Indexed: 10/31/2023]
Abstract
Neuronal differentiation is regulated by neuronal activity. Here, we analyzed dendritic and axonal growth of Basket cells (BCs) and non-Basket cells (non-BCs) using sparse transfection of channelrhodopsin-YFP and repetitive optogenetic stimulation in slice cultures of rat visual cortex. Neocortical interneurons often display axon-carrying dendrites (AcDs). We found that the AcDs of BCs and non-BCs were, on average, the most complex dendrites. Further, the AcD configuration had an influence on BC axonal development. Axons originating from an AcD formed denser arborizations with more terminal endings within the dendritic field of the parent cell. Intriguingly, this occurred already in unstimulated BCs, and complexity was not increased further by optogenetic stimulation. However, optogenetic stimulation exerted a growth-promoting effect on axons emerging from BC somata. The axons of non-BCs neither responded to the AcD configuration nor to the optogenetic stimulation. The results suggest that the formation of locally dense BC plexuses is regulated by spontaneous activity. Moreover, in the AcD configuration, the AcD and the axon it carries mutually support each other's growth.
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Affiliation(s)
- Steffen Gonda
- Developmental Neurobiology, Faculty of Biology and Biotechnology, Ruhr University Bochum, 44801 Bochum, Germany
| | - Christian Riedel
- Developmental Neurobiology, Faculty of Biology and Biotechnology, Ruhr University Bochum, 44801 Bochum, Germany
| | - Andreas Reiner
- Cellular Neurobiology, Faculty of Biology and Biotechnology, Ruhr University Bochum, 44801 Bochum, Germany
| | - Ina Köhler
- Developmental Neurobiology, Faculty of Biology and Biotechnology, Ruhr University Bochum, 44801 Bochum, Germany
| | - Petra Wahle
- Developmental Neurobiology, Faculty of Biology and Biotechnology, Ruhr University Bochum, 44801 Bochum, Germany
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Munguba H, Nikouei K, Hochgerner H, Oberst P, Kouznetsova A, Ryge J, Muñoz-Manchado AB, Close J, Batista-Brito R, Linnarsson S, Hjerling-Leffler J. Transcriptional maintenance of cortical somatostatin interneuron subtype identity during migration. Neuron 2023; 111:3590-3603.e5. [PMID: 37625400 DOI: 10.1016/j.neuron.2023.07.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 06/08/2023] [Accepted: 07/27/2023] [Indexed: 08/27/2023]
Abstract
Although cardinal cortical interneuron identity is established upon cell-cycle exit, it remains unclear whether specific interneuron subtypes are pre-established, and if so, how their identity is maintained prior to circuit integration. We conditionally removed Sox6 (Sox6-cKO) in migrating somatostatin (Sst+) interneurons and assessed the effects on their mature identity. In adolescent mice, five of eight molecular Sst+ subtypes were nearly absent in the Sox6-cKO cortex without a reduction in cell number. Sox6-cKO cells displayed electrophysiological maturity and expressed genes enriched within the broad class of Sst+ interneurons. Furthermore, we could infer subtype identity prior to cortical integration (embryonic day 18.5), suggesting that the loss in subtype was due to disrupted subtype maintenance. Conversely, Sox6 removal at postnatal day 7 did not disrupt marker expression in the mature cortex. Therefore, Sox6 is necessary during migration for maintenance of Sst+ subtype identity, indicating that subtype maintenance requires active transcriptional programs.
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Affiliation(s)
- Hermany Munguba
- Laboratory of Molecular Neurobiology, Department Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Kasra Nikouei
- Laboratory of Molecular Neurobiology, Department Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Hannah Hochgerner
- Laboratory of Molecular Neurobiology, Department Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Polina Oberst
- Laboratory of Molecular Neurobiology, Department Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Alexandra Kouznetsova
- Laboratory of Molecular Neurobiology, Department Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Jesper Ryge
- Brain Mind Institute, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Ana Belén Muñoz-Manchado
- Laboratory of Molecular Neurobiology, Department Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden; Departamento de Anatomía Patológica, Biología Celular, Histología, Historia de la Ciencia, Medicina Legal y Forense y Toxicología, Instituto de Investigación e Innovación Biomédica de Cádiz (INiBICA), Universidad de Cádiz, Cádiz, Spain
| | - Jennie Close
- Allen Institute for Brain Science, Seattle, WA, USA
| | - Renata Batista-Brito
- Einstein College of Medicine, Dominick Purpura Department of Neuroscience, 1300 Morris Park Ave, The Bronx, NY 10461, USA; Einstein College of Medicine, Department of Psychiatry and Behavioral Sciences, 1300 Morris Park Ave, The Bronx, NY 10461, USA; Einstein College of Medicine, Department of Genetics, 1300 Morris Park Ave, The Bronx, NY 10461, USA
| | - Sten Linnarsson
- Laboratory of Molecular Neurobiology, Department Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Jens Hjerling-Leffler
- Laboratory of Molecular Neurobiology, Department Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden.
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Krokidis MG, Vrahatis AG, Lazaros K, Skolariki K, Exarchos TP, Vlamos P. Machine Learning Analysis of Alzheimer's Disease Single-Cell RNA-Sequencing Data across Cortex and Hippocampus Regions. Curr Issues Mol Biol 2023; 45:8652-8669. [PMID: 37998721 PMCID: PMC10670182 DOI: 10.3390/cimb45110544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 10/15/2023] [Accepted: 10/26/2023] [Indexed: 11/25/2023] Open
Abstract
Advancements in molecular biology have revolutionized our understanding of complex diseases, with Alzheimer's disease being a prime example. Single-cell sequencing, currently the most suitable technology, facilitates profoundly detailed disease analysis at the cellular level. Prior research has established that the pathology of Alzheimer's disease varies across different brain regions and cell types. In parallel, only machine learning has the capacity to address the myriad challenges presented by such studies, where the integration of large-scale data and numerous experiments is required to extract meaningful knowledge. Our methodology utilizes single-cell RNA sequencing data from healthy and Alzheimer's disease (AD) samples, focused on the cortex and hippocampus regions in mice. We designed three distinct case studies and implemented an ensemble feature selection approach through machine learning, also performing an analysis of distinct age-related datasets to unravel age-specific effects, showing differential gene expression patterns within each condition. Important evidence was reported, such as enrichment in central nervous system development and regulation of oligodendrocyte differentiation between the hippocampus and cortex of 6-month-old AD mice as well as regulation of epinephrine secretion and dendritic spine morphogenesis in 15-month-old AD mice. Our outcomes from all three of our case studies illustrate the capacity of machine learning strategies when applied to single-cell data, revealing critical insights into Alzheimer's disease.
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Affiliation(s)
- Marios G. Krokidis
- Bioinformatics and Human Electrophysiology Laboratory, Department of Informatics, Ionian University, 49100 Corfu, Greece; (A.G.V.); (K.L.); (K.S.); (T.P.E.); (P.V.)
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Zupančič M, Tretiakov E, Máté Z, Erdélyi F, Szabó G, Clotman F, Hökfelt T, Harkany T, Keimpema E. Brain-wide mapping of efferent projections of glutamatergic (Onecut3 + ) neurons in the lateral mouse hypothalamus. Acta Physiol (Oxf) 2023; 238:e13973. [PMID: 37029761 PMCID: PMC10909463 DOI: 10.1111/apha.13973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 03/31/2023] [Accepted: 04/04/2023] [Indexed: 04/09/2023]
Abstract
AIM This study mapped the spatiotemporal positions and connectivity of Onecut3+ neuronal populations in the developing and adult mouse brain. METHODS We generated fluorescent reporter mice to chart Onecut3+ neurons for brain-wide analysis. Moreover, we crossed Onecut3-iCre and Mapt-mGFP (Tau-mGFP) mice to visualize axonal projections. A dual Cre/Flp-dependent AAV construct in Onecut3-iCre cross-bred with Slc17a6-FLPo mice was used in an intersectional strategy to map the connectivity of glutamatergic lateral hypothalamic neurons in the adult mouse. RESULTS We first found that Onecut3 marks a hitherto undescribed Slc17a6+ /Vglut2+ neuronal cohort in the lateral hypothalamus, with the majority expressing thyrotropin-releasing hormone. In the adult, Onecut3+ /Vglut2+ neurons of the lateral hypothalamus had both intra- and extrahypothalamic efferents, particularly to the septal complex and habenula, where they targeted other cohorts of Onecut3+ neurons and additionally to the neocortex and hippocampus. This arrangement suggests that intrinsic reinforcement loops could exist for Onecut3+ neurons to coordinate their activity along the brain's midline axis. CONCLUSION We present both a toolbox to manipulate novel subtypes of hypothalamic neurons and an anatomical arrangement by which extrahypothalamic targets can be simultaneously entrained.
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Affiliation(s)
- Maja Zupančič
- Department of Molecular Neurosciences, Center for Brain ResearchMedical University of ViennaViennaAustria
| | - Evgenii Tretiakov
- Department of Molecular Neurosciences, Center for Brain ResearchMedical University of ViennaViennaAustria
| | - Zoltán Máté
- Institute of Experimental Medicine, Hungarian Academy of SciencesBudapestHungary
| | - Ferenc Erdélyi
- Institute of Experimental Medicine, Hungarian Academy of SciencesBudapestHungary
| | - Gábor Szabó
- Institute of Experimental Medicine, Hungarian Academy of SciencesBudapestHungary
| | - Frédéric Clotman
- Animal Molecular and Cellular Biology Group, Louvain Institute of Biomolecular Science and TechnologyUniversité Catholique de LouvainLouvain‐la‐NeuveBelgium
| | - Tomas Hökfelt
- Department of Neuroscience, Biomedicum 7DKarolinska InstitutetSolnaSweden
| | - Tibor Harkany
- Department of Molecular Neurosciences, Center for Brain ResearchMedical University of ViennaViennaAustria
- Department of Neuroscience, Biomedicum 7DKarolinska InstitutetSolnaSweden
| | - Erik Keimpema
- Department of Molecular Neurosciences, Center for Brain ResearchMedical University of ViennaViennaAustria
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Chehrazi P, Lee KKY, Lavertu-Jolin M, Abbasnejad Z, Carreño-Muñoz MI, Chattopadhyaya B, Di Cristo G. p75 neurotrophin receptor in pre-adolescent prefrontal PV interneurons promotes cognitive flexibility in adult mice. Biol Psychiatry 2023:S0006-3223(23)01238-6. [PMID: 37120061 DOI: 10.1016/j.biopsych.2023.04.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 03/31/2023] [Accepted: 04/16/2023] [Indexed: 05/01/2023]
Abstract
BACKGROUND Parvalbumin (PV)-positive GABAergic cells provide robust perisomatic inhibition to neighboring pyramidal neurons and regulate brain oscillations. Alterations in PV interneuron connectivity and function in the medial prefrontal cortex (mPFC) have been consistently reported in psychiatric disorders associated with cognitive rigidity, suggesting that PV cell deficits could be a core cellular phenotype in these disorders. p75 neurotrophin receptor (p75NTR) regulates the time course of PV cell maturation in a cell-autonomous fashion. Whether p75NTR expression during postnatal development affects adult prefrontal PV cell connectivity and cognitive function is unknown. METHODS We generated transgenic mice with conditional knockout (cKO) of p75NTR in postnatal PV cells. We analysed PV cell connectivity and recruitment following a tail pinch, by immunolabeling and confocal imaging, in naïve mice or following p75NTR re-expression in pre- or post-adolescent mice using Cre-dependent viral vectors. Cognitive flexibility was evaluated using behavioral tests. RESULTS PV cell-specific p75NTR deletion increased both PV cell synapse density and the proportion of PV cells surrounded by perineuronal nets, a marker of mature PV cells, in adult mPFC but not visual cortex. Both phenotypes were rescued by viral-mediated re-introduction of p75NTR in pre-adolescent but not post-adolescent mPFC. Prefrontal cortical PV cells failed to upregulate c-Fos following a tail-pinch stimulation in adult cKO mice. Finally, cKO mice showed impaired fear memory extinction learning as well as deficits in a attention set-shifting task. CONCLUSION These findings suggest that p75NTR expression in adolescent PV cells contributes to the fine tuning of their connectivity and promotes cognitive flexibility in adulthood.
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Affiliation(s)
- Pegah Chehrazi
- Centre de Recherche, CHU Sainte-Justine (CHUSJ), Montréal, Canada; Department of Neurosciences, Université de Montréal, Montréal, Canada
| | - Karen Ka Yan Lee
- Centre de Recherche, CHU Sainte-Justine (CHUSJ), Montréal, Canada; Department of Neurosciences, Université de Montréal, Montréal, Canada
| | - Marisol Lavertu-Jolin
- Centre de Recherche, CHU Sainte-Justine (CHUSJ), Montréal, Canada; Department of Neurosciences, Université de Montréal, Montréal, Canada
| | - Zahra Abbasnejad
- Centre de Recherche, CHU Sainte-Justine (CHUSJ), Montréal, Canada; Department of Neurosciences, Université de Montréal, Montréal, Canada
| | - Maria Isabel Carreño-Muñoz
- Centre de Recherche, CHU Sainte-Justine (CHUSJ), Montréal, Canada; Department of Neurosciences, Université de Montréal, Montréal, Canada
| | | | - Graziella Di Cristo
- Centre de Recherche, CHU Sainte-Justine (CHUSJ), Montréal, Canada; Department of Neurosciences, Université de Montréal, Montréal, Canada.
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Llorca A, Deogracias R. Origin, Development, and Synaptogenesis of Cortical Interneurons. Front Neurosci 2022; 16:929469. [PMID: 35833090 PMCID: PMC9272671 DOI: 10.3389/fnins.2022.929469] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 06/01/2022] [Indexed: 11/13/2022] Open
Abstract
The mammalian cerebral cortex represents one of the most recent and astonishing inventions of nature, responsible of a large diversity of functions that range from sensory processing to high-order cognitive abilities, such as logical reasoning or language. Decades of dedicated study have contributed to our current understanding of this structure, both at structural and functional levels. A key feature of the neocortex is its outstanding richness in cell diversity, composed by multiple types of long-range projecting neurons and locally connecting interneurons. In this review, we will describe the great diversity of interneurons that constitute local neocortical circuits and summarize the mechanisms underlying their development and their assembly into functional networks.
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Affiliation(s)
- Alfredo Llorca
- Visual Neuroscience Laboratory, Centre for Discovery Brain Sciences, School of Biomedical Sciences, University of Edinburgh, Edinburg, United Kingdom
- *Correspondence: Alfredo Llorca
| | - Ruben Deogracias
- Neuronal Circuits Formation and Brain Disorders Laboratory, Institute of Neurosciences of Castilla y León (INCyL), University of Salamanca, Salamanca, Spain
- Institute of Biomedical Research of Salamanca, Salamanca, Spain
- Department of Cell Biology and Pathology, School of Medicine, University of Salamanca, Salamanca, Spain
- Ruben Deogracias
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