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Floris G, Godar SC, Braccagni G, Piras IS, Ravens A, Zanda MT, Huentelman MJ, Bortolato M. The sinking platform test: a novel paradigm to measure persistence in animal models. Neuropsychopharmacology 2024; 49:1373-1382. [PMID: 38396257 PMCID: PMC11251282 DOI: 10.1038/s41386-024-01827-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/21/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024]
Abstract
Persistence is the propensity to maintain goal-directed actions despite adversities. While this temperamental trait is crucial to mitigate depression risk, its neurobiological foundations remain elusive. Developing behavioral tasks to capture persistence in animal models is crucial for understanding its molecular underpinnings. Here, we introduce the Sinking Platform Test (SPT), a novel high-throughput paradigm to measure persistence. Mice were trained to exit a water-filled tank by ascending onto a platform above water level. Throughout the training, mice were also occasionally exposed to "failure trials," during which an operator would submerge a platform right after the mouse climbed onto it, requiring the mouse to reach and ascend a newly introduced platform. Following training, mice were subjected to a 5-min test exclusively consisting of failure trials. Male and female mice exhibited comparable persistence, measured by the number of climbed platforms during the test. Furthermore, this index was increased by chronic administration of fluoxetine or imipramine; conversely, it was reduced by acute and chronic haloperidol. Notably, six weeks of social isolation reduced SPT performance, and this effect was rescued by imipramine treatment over the last two weeks. A 4-week regimen of voluntary wheel running also improved persistence in socially isolated mice. Finally, comparing transcriptomic profiles of the prefrontal cortex of mice with high and low SPT performance revealed significant enrichment of immediate-early genes known to shape susceptibility for chronic stress. These findings highlight the potential of SPT as a promising method to uncover the biological mechanisms of persistence and evaluate novel interventions to enhance this response.
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Affiliation(s)
- Gabriele Floris
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Utah, Salt Lake City, UT, USA
- Center for Substance Abuse Research, Temple University, Philadelphia, PA, USA
- Department of Neural Sciences, Temple University, Philadelphia, PA, USA
| | - Sean C Godar
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Utah, Salt Lake City, UT, USA
| | - Giulia Braccagni
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Utah, Salt Lake City, UT, USA
| | - Ignazio S Piras
- Neurogenomics Division, Translational Genomics Research Institute (TGen), Phoenix, AZ, USA
| | - Alicia Ravens
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Utah, Salt Lake City, UT, USA
| | - Mary T Zanda
- Department of Psychiatry, School of Medicine, Yale University, New Haven, CT, USA
| | - Matthew J Huentelman
- Neurogenomics Division, Translational Genomics Research Institute (TGen), Phoenix, AZ, USA
| | - Marco Bortolato
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Utah, Salt Lake City, UT, USA.
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Nakazato H, Onodera S, Aida N, Furusawa M, Azuma T. Comprehensive analysis of transcription factors involved in odontoblast differentiation mechanism. Med Mol Morphol 2024:10.1007/s00795-024-00389-w. [PMID: 38987402 DOI: 10.1007/s00795-024-00389-w] [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: 12/28/2023] [Accepted: 04/18/2024] [Indexed: 07/12/2024]
Abstract
Primary cultured odontoblasts rapidly lose their tissue-specific phenotype. To identify transcription factors (TF) that are important for the maintenance of the odontoblast phenotype, primary cultures of C57BL/6 J mouse dental mesenchymal cells (DMC) were isolated, and expression of TF and odontoblast marker genes in cells immediately after isolation and 2 days after culture were comprehensively evaluated and compared using RNA-sequencing (RNA-seq). The expression of odontoblast markers in mouse dental mesenchymal cells decreased rapidly after isolation. In addition, the expression of Hedgehog-related, Notch-related, and immediate- early gene (IEG)-related transcription factors significantly decreased. Forced expression of these genes in lentiviral vectors, together with fibroblast growth factor 4 (FGF4), fibroblast growth factor 9 (FGF9), and the Wnt pathway activator CHIR99021, significantly induced the expression of odontogenic marker genes. These results indicate, for the first time, that Notch signaling and early genes may be important for maintaining odontoblast cultures. Furthermore, simultaneous stimulation of FGF, Wnt, Hedgehog, Notch pathways, and IEG transcription factors cooperatively promoted the maintenance of the odontoblast phenotype. These results suggest that the Hedgehog and Notch signaling pathways may play an important role in maintaining odontoblast phenotypes, in addition to FGF and Wnt signaling.
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Affiliation(s)
- Haruka Nakazato
- Department of Endodontics, Tokyo Dental College, 2-9-18 Kanda-Misaki-Chou, Chiyoda, Tokyo, 101-0061, Japan
| | - Shoko Onodera
- Department of Biochemistry, Tokyo Dental College, 2-9-18 Kanda-Misaki-Chou, Chiyoda, Tokyo, 101-0061, Japan
| | - Natsuko Aida
- Department of Biochemistry, Tokyo Dental College, 2-9-18 Kanda-Misaki-Chou, Chiyoda, Tokyo, 101-0061, Japan
| | - Masahiro Furusawa
- Department of Endodontics, Tokyo Dental College, 2-9-18 Kanda-Misaki-Chou, Chiyoda, Tokyo, 101-0061, Japan
| | - Toshifumi Azuma
- Department of Biochemistry, Tokyo Dental College, 2-9-18 Kanda-Misaki-Chou, Chiyoda, Tokyo, 101-0061, Japan.
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3
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Wudarski J, Aliabadi S, Gulia-Nuss M. Arthropod promoters for genetic control of disease vectors. Trends Parasitol 2024; 40:619-632. [PMID: 38824066 PMCID: PMC11223965 DOI: 10.1016/j.pt.2024.04.011] [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: 02/16/2024] [Revised: 04/15/2024] [Accepted: 04/15/2024] [Indexed: 06/03/2024]
Abstract
Vector-borne diseases (VBDs) impose devastating effects on human health and a heavy financial burden. Malaria, Lyme disease, and dengue fever are just a few examples of VBDs that cause severe illnesses. The current strategies to control VBDs consist mainly of environmental modification and chemical use, and to a small extent, genetic approaches. The genetic approaches, including transgenesis/genome modification and gene-drive technologies, provide the basis for developing new tools for VBD prevention by suppressing vector populations or reducing their capacity to transmit pathogens. The regulatory elements such as promoters are required for a robust sex-, tissue-, and stage-specific transgene expression. As discussed in this review, information on the regulatory elements is available for mosquito vectors but is scant for other vectors.
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Affiliation(s)
- Jakub Wudarski
- Department of Biochemistry and Molecular Biology, University of Nevada, Reno, NV, USA
| | - Simindokht Aliabadi
- Department of Biochemistry and Molecular Biology, University of Nevada, Reno, NV, USA
| | - Monika Gulia-Nuss
- Department of Biochemistry and Molecular Biology, University of Nevada, Reno, NV, USA.
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Priya, Yadav N, Anand S, Banerjee J, Tripathi M, Chandra PS, Dixit AB. The multifaceted role of Wnt canonical signalling in neurogenesis, neuroinflammation, and hyperexcitability in mesial temporal lobe epilepsy. Neuropharmacology 2024; 251:109942. [PMID: 38570066 DOI: 10.1016/j.neuropharm.2024.109942] [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: 12/15/2023] [Revised: 03/18/2024] [Accepted: 03/29/2024] [Indexed: 04/05/2024]
Abstract
Epilepsy is a neurological disorder characterised by unprovoked, repetitive seizures caused by abnormal neuronal firing. The Wnt/β-Catenin signalling pathway is involved in seizure-induced neurogenesis, aberrant neurogenesis, neuroinflammation, and hyperexcitability associated with epileptic disorder. Wnt/β-Catenin signalling is crucial for early brain development processes including neuronal patterning, synapse formation, and N-methyl-d-aspartate receptor (NMDAR) regulation. Disruption of molecular networks such as Wnt/β-catenin signalling in epilepsy could offer encouraging anti-epileptogenic targets. So, with a better understanding of the canonical Wnt/-Catenin pathway, we highlight in this review the important elements of Wnt/-Catenin signalling specifically in Mesial Temporal Lobe Epilepsy (MTLE) for potential therapeutic targets.
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Affiliation(s)
- Priya
- Dr. B.R Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
| | - Nitin Yadav
- Dr. B.R Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
| | - Sneha Anand
- Dr. B.R Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
| | - Jyotirmoy Banerjee
- Department of Biophysics, All India Institute of Medical Sciences, New Delhi, India
| | - Manjari Tripathi
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - P Sarat Chandra
- Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India
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Simon RC, Loveless MC, Yee JX, Goh B, Cho SG, Nasir Z, Hashikawa K, Stuber GD, Zweifel LS, Soden ME. Opto-seq reveals input-specific immediate-early gene induction in ventral tegmental area cell types. Neuron 2024:S0896-6273(24)00373-8. [PMID: 38901431 DOI: 10.1016/j.neuron.2024.05.026] [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: 06/22/2023] [Revised: 03/18/2024] [Accepted: 05/27/2024] [Indexed: 06/22/2024]
Abstract
The ventral tegmental area (VTA) is a critical node in circuits governing motivated behavior and is home to diverse populations of neurons that release dopamine, gamma-aminobutyric acid (GABA), glutamate, or combinations of these neurotransmitters. The VTA receives inputs from many brain regions, but a comprehensive understanding of input-specific activation of VTA neuronal subpopulations is lacking. To address this, we combined optogenetic stimulation of select VTA inputs with single-nucleus RNA sequencing (snRNA-seq) and highly multiplexed in situ hybridization to identify distinct neuronal clusters and characterize their spatial distribution and activation patterns. Quantification of immediate-early gene (IEG) expression revealed that different inputs activated select VTA subpopulations, which demonstrated cell-type-specific transcriptional programs. Within dopaminergic subpopulations, IEG induction levels correlated with differential expression of ion channel genes. This new transcriptomics-guided circuit analysis reveals the diversity of VTA activation driven by distinct inputs and provides a resource for future analysis of VTA cell types.
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Affiliation(s)
- Rhiana C Simon
- Graduate Program in Neuroscience, University of Washington, Seattle, WA 98195, USA; Center for the Neurobiology of Addiction, Pain, and Emotion, University of Washington, Seattle, WA 98195, USA
| | - Mary C Loveless
- Center for the Neurobiology of Addiction, Pain, and Emotion, University of Washington, Seattle, WA 98195, USA; Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA 98195, USA; Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
| | - Joshua X Yee
- Center for the Neurobiology of Addiction, Pain, and Emotion, University of Washington, Seattle, WA 98195, USA; Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
| | - Brandon Goh
- Center for the Neurobiology of Addiction, Pain, and Emotion, University of Washington, Seattle, WA 98195, USA; Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
| | - Su G Cho
- Center for the Neurobiology of Addiction, Pain, and Emotion, University of Washington, Seattle, WA 98195, USA; Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
| | - Zainab Nasir
- Center for the Neurobiology of Addiction, Pain, and Emotion, University of Washington, Seattle, WA 98195, USA; Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
| | - Koichi Hashikawa
- Center for the Neurobiology of Addiction, Pain, and Emotion, University of Washington, Seattle, WA 98195, USA; Department of Pharmacology, University of Washington, Seattle, WA 98195, USA; Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA 98195, USA
| | - Garret D Stuber
- Center for the Neurobiology of Addiction, Pain, and Emotion, University of Washington, Seattle, WA 98195, USA; Department of Pharmacology, University of Washington, Seattle, WA 98195, USA; Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA 98195, USA
| | - Larry S Zweifel
- Center for the Neurobiology of Addiction, Pain, and Emotion, University of Washington, Seattle, WA 98195, USA; Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA 98195, USA; Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
| | - Marta E Soden
- Center for the Neurobiology of Addiction, Pain, and Emotion, University of Washington, Seattle, WA 98195, USA; Department of Pharmacology, University of Washington, Seattle, WA 98195, USA.
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Wang Y, Fan H, Zou Y, Song W, Li L, Xie J, Chen S. Expression of early growth responsive gene-1 in the lateral geniculate body of kittens with amblyopia caused by monocular form deprivation. Eur J Ophthalmol 2024; 34:408-418. [PMID: 37437134 DOI: 10.1177/11206721231187926] [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] [Indexed: 07/14/2023]
Abstract
OBJECTIVE The expression of early growth responsive gene-1 (Egr-1) in the lateral geniculate body in the normal kittens and those affected with amblyopia caused by monocular visual deprivation was compared to explore the potential significance of Egr-1 in the pathogenesis of amblyopia. METHODS A total of 30 healthy kittens were equally and randomly divided into the control (n = 15) and the deprivation group (n = 15). The kittens were raised in natural light and the right eyes of the deprived kittens were covered with a black opaque covering. Pattern visual evoked potential (PVEP) was measured before and 1, 3, and 5 weeks after covering. Five kittens from each group were randomly selected and euthanized with 2% sodium pentobarbital (100 mg/kg) during the 1st, 3rd and 5th week after covering. The expression of Egr-1 in the lateral geniculate body in the two groups was compared by performing immunohistochemistry and in situ hybridization. RESULTS After three weeks of covering, PVEP detection indicated that the P100 wave latency in the deprivation group was significantly higher than that in the control group (P < 0.05), whereas the amplitude decreased markedly (P < 0.05). The number of the positive cells (P < 0.05) and mean optical density (P < 0.05) of Egr-1 protein expression in the lateral geniculate body of the deprivation group were found to be substantially lower in comparison to the normal group, as well as the number (P < 0.05) and mean optical density of Egr-1 mRNA-positive cells (P < 0.05). However, with increase of age, positive expression of Egr-1 in the control group showed an upward trend (P < 0.05), but this trend was not noted in the deprivation group (P > 0.05). CONCLUSIONS Monocular form deprivation can lead to substantially decreased expressions of Egr-1 protein and mRNA in the lateral geniculate body, which in turn can affect the normal expression of neuronal functions in the lateral geniculate body, thereby promoting the occurrence and development of amblyopia.
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Affiliation(s)
- Ying Wang
- Department of Optometry, North Sichuan Medical College, Nanchong, China
- Department of Ophthalmology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Haobo Fan
- Department of Optometry, North Sichuan Medical College, Nanchong, China
- Department of Ophthalmology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
- Department of Optometry and Pediatric Ophthalmology, Ineye Hospital of Chengdu University of TCM, Chengdu, China
| | - Yunchun Zou
- Department of Optometry, North Sichuan Medical College, Nanchong, China
- Department of Ophthalmology, the Second Clinical College of North Sichuan Medical College (Nanchong Central Hospital), Nanchong, China
| | - Weiqi Song
- Department of Optometry, North Sichuan Medical College, Nanchong, China
- Department of Ophthalmology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Lan Li
- Langzhong People's Hospital, Langzhong, Sichuan, China
| | - Juan Xie
- Department of Optometry, North Sichuan Medical College, Nanchong, China
- Department of Ophthalmology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Siyu Chen
- Department of Optometry, North Sichuan Medical College, Nanchong, China
- Department of Ophthalmology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
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Vingan I, Phatarpekar S, Tung VSK, Hernández AI, Evgrafov OV, Alarcon JM. Spatially Resolved Transcriptomic Signatures of Hippocampal Subregions and Arc-Expressing Ensembles in Active Place Avoidance Memory. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.12.30.573225. [PMID: 38260257 PMCID: PMC10802250 DOI: 10.1101/2023.12.30.573225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
The rodent hippocampus is a spatially organized neuronal network that supports the formation of spatial and episodic memories. We conducted bulk RNA sequencing and spatial transcriptomics experiments to measure gene expression changes in the dorsal hippocampus following the recall of active place avoidance (APA) memory. Through bulk RNA sequencing, we examined the gene expression changes following memory recall across the functionally distinct subregions of the dorsal hippocampus. We found that recall induced differentially expressed genes (DEGs) in the CA1 and CA3 hippocampal subregions were enriched with genes involved in synaptic transmission and synaptic plasticity, while DEGs in the dentate gyrus (DG) were enriched with genes involved in energy balance and ribosomal function. Through spatial transcriptomics, we examined gene expression changes following memory recall across an array of spots encompassing putative memory-associated neuronal ensembles marked by the expression of the IEGs Arc, Egr1, and c-Jun. Within samples from both trained and untrained mice, the subpopulations of spatial transcriptomic spots marked by these IEGs were transcriptomically and spatially distinct from one another. DEGs detected between Arc+ and Arc- spots exclusively in the trained mouse were enriched in several memory-related gene ontology terms, including "regulation of synaptic plasticity" and "memory." Our results suggest that APA memory recall is supported by regionalized transcriptomic profiles separating the CA1 and CA3 from the DG, transcriptionally and spatially distinct IEG expressing spatial transcriptomic spots, and biological processes related to synaptic plasticity as a defining the difference between Arc+ and Arc- spatial transcriptomic spots.
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Affiliation(s)
- Isaac Vingan
- School of Graduates Studies, Program in Neural and Behavioral Sciences, State University of New York, Downstate Health Sciences University, Brooklyn, NY, USA
| | - Shwetha Phatarpekar
- Institute of Genomics in Health, State University of New York, Downstate Health Sciences University, Brooklyn, NY, USA
| | - Victoria Sook Keng Tung
- School of Graduates Studies, Program in Molecular and Cell Biology, State University of New York, Downstate Health Sciences University, Brooklyn, NY, USA
| | - A Iván Hernández
- School of Graduates Studies, Program in Neural and Behavioral Sciences, State University of New York, Downstate Health Sciences University, Brooklyn, NY, USA
- Department of Pathology, State University of New York, Downstate Health Sciences University, Brooklyn, NY, USA
- The Robert F. Furchgott Center for Neural & Behavioral Science, State University of New York, Downstate Health Sciences University, Brooklyn, NY, USA
| | - Oleg V Evgrafov
- Institute of Genomics in Health, State University of New York, Downstate Health Sciences University, Brooklyn, NY, USA
- School of Graduates Studies, Program in Molecular and Cell Biology, State University of New York, Downstate Health Sciences University, Brooklyn, NY, USA
- Department of Cell Biology, State University of New York, Downstate Health Sciences University, Brooklyn, NY, USA
- Department of Genetics, Human Genetics Institute of New Jersey, Rutgers University, Piscataway, NJ, USA
| | - Juan Marcos Alarcon
- School of Graduates Studies, Program in Neural and Behavioral Sciences, State University of New York, Downstate Health Sciences University, Brooklyn, NY, USA
- Department of Pathology, State University of New York, Downstate Health Sciences University, Brooklyn, NY, USA
- The Robert F. Furchgott Center for Neural & Behavioral Science, State University of New York, Downstate Health Sciences University, Brooklyn, NY, USA
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Walker H, Frost NA. Distinct transcriptional programs define a heterogeneous neuronal ensemble for social interaction. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.22.573153. [PMID: 38187723 PMCID: PMC10769355 DOI: 10.1101/2023.12.22.573153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
Reliable representations of information regarding complex behaviors including social interactions require the coordinated activity of heterogeneous cell types within distributed brain regions. Activity in the medial prefrontal cortex is critical in regulating social behavior, but our understanding of the specific cell types which comprise the social ensemble has been limited by available mouse lines and molecular tagging strategies which rely on the expression of a single marker gene. Here we sought to quantify the heterogeneous neuronal populations which are recruited during social interaction in parallel in a non-biased manner and determine how distinct cell types are differentially active during social interactions. We identify distinct populations of prefrontal neurons activated by social interaction by quantification of immediate early gene (IEG) expression in transcriptomically clustered neurons. This approach revealed variability in the recruitment of different excitatory and inhibitory populations within the medial prefrontal cortex. Furthermore, evaluation of the populations of IEGs recruited following social interaction revealed both cell-type and region-specific transcriptional programs, suggesting that reliance on a single molecular marker is insufficient to quantify activation across all cell types. Our findings provide a comprehensive description of cell-type specific transcriptional programs invoked by social interactions and reveal new insights into the heterogeneous neuronal populations which compose the social ensemble.
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Barrios-Camacho CM, Zunitch MJ, Louie JD, Jang W, Schwob JE. An in vitro model of acute horizontal basal cell activation reveals dynamic gene regulatory networks underlying the acute activation phase. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.14.568855. [PMID: 38168359 PMCID: PMC10760135 DOI: 10.1101/2023.12.14.568855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Horizontal basal cells (HBCs) activate only in response to severe olfactory epithelium (OE) injury. This activation is mediated by the loss of the transcription factor TP63. Using the compound phorbol 12-myristate 13-acetate (PMA), we find that we can model the process of acute HBC activation. First, we find that PMA treatment induces a rapid loss in TP63 protein and induces the expression of HOPX and the nuclear translocation of RELA, previously identified to mediate HBC activation. Using bulk RNA sequencing, we find that PMA-treated HBCs pass through various stages of acute activation identifiable by transcriptional regulatory signatures that mimic stages identified in vivo . These temporal stages are associated with varying degrees of engraftment and differentiation potential in transplantation assays. Together, this data shows that our model can model physiologically relevant features of HBC activation and identifies new candidates for mechanistic testing.
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Camera F, Colantoni E, Garcia-Sanchez T, Benassi B, Consales C, Muscat A, Vallet L, Mir LM, Andre F, Merla C. In Vitro Imaging and Molecular Characterization of Ca 2+ Flux Modulation by Nanosecond Pulsed Electric Fields. Int J Mol Sci 2023; 24:15616. [PMID: 37958601 PMCID: PMC10647260 DOI: 10.3390/ijms242115616] [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: 09/06/2023] [Revised: 10/18/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
In recent years, the application of pulsed electric fields with very short durations (nanoseconds) and extremely high amplitudes (MV/m) has been investigated for novel medical purposes. Various electric protocols have been explored for different objectives, including the utilization of fractionated pulse doses to enhance cell electrosensitization to the uptake of different markers or an increase in apoptosis. This study focused on the use of fluorescence imaging to examine molecular calcium fluxes induced by different fractionated protocols of short electric pulses in neuroblastoma (SH-SY5Y) and mesenchymal stem cells (HaMSCs) that were electroporated using nanosecond pulsed electric fields. In our experimental setup, we did not observe cell electrosensitization in terms of an increase in calcium flux following the administration of fractionated doses of nanosecond pulsed electric fields with respect to the non-fractionated dose. However, we observed the targeted activation of calcium-dependent genes (c-FOS, c-JUN, EGR1, NURR-1, β3-TUBULIN) based on the duration of calcium flux, independent of the instantaneous levels achieved but solely dependent on the final plateau reached. This level of control may have potential applications in various medical and biological treatments that rely on calcium and the delivery of nanosecond pulsed electric fields.
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Affiliation(s)
- Francesca Camera
- Division of Health Protection Technologies, Italian National Agency for Energy, New Technologies and Sustainable Economic Development (ENEA), 00123 Rome, Italy; (F.C.); (E.C.); (B.B.); (C.C.)
| | - Eleonora Colantoni
- Division of Health Protection Technologies, Italian National Agency for Energy, New Technologies and Sustainable Economic Development (ENEA), 00123 Rome, Italy; (F.C.); (E.C.); (B.B.); (C.C.)
| | - Tomas Garcia-Sanchez
- Department of Information and Communication Technologies, Pompeu Fabra University, 08002 Barcelona, Spain;
| | - Barbara Benassi
- Division of Health Protection Technologies, Italian National Agency for Energy, New Technologies and Sustainable Economic Development (ENEA), 00123 Rome, Italy; (F.C.); (E.C.); (B.B.); (C.C.)
| | - Claudia Consales
- Division of Health Protection Technologies, Italian National Agency for Energy, New Technologies and Sustainable Economic Development (ENEA), 00123 Rome, Italy; (F.C.); (E.C.); (B.B.); (C.C.)
| | - Adeline Muscat
- CNRS, Metabolic and Systemic Aspects of the Oncogenesis, (METSY), Institute Gustave Roussy, Paris-Saclay University, 94805 Villejuif, France; (A.M.); (L.V.); (L.M.M.); (F.A.)
| | - Leslie Vallet
- CNRS, Metabolic and Systemic Aspects of the Oncogenesis, (METSY), Institute Gustave Roussy, Paris-Saclay University, 94805 Villejuif, France; (A.M.); (L.V.); (L.M.M.); (F.A.)
| | - Luis M. Mir
- CNRS, Metabolic and Systemic Aspects of the Oncogenesis, (METSY), Institute Gustave Roussy, Paris-Saclay University, 94805 Villejuif, France; (A.M.); (L.V.); (L.M.M.); (F.A.)
| | - Franck Andre
- CNRS, Metabolic and Systemic Aspects of the Oncogenesis, (METSY), Institute Gustave Roussy, Paris-Saclay University, 94805 Villejuif, France; (A.M.); (L.V.); (L.M.M.); (F.A.)
| | - Caterina Merla
- Division of Health Protection Technologies, Italian National Agency for Energy, New Technologies and Sustainable Economic Development (ENEA), 00123 Rome, Italy; (F.C.); (E.C.); (B.B.); (C.C.)
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Wang Y, Hong Q, Xia Y, Zhang Z, Wen B. The Lysine Demethylase KDM7A Regulates Immediate Early Genes in Neurons. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2301367. [PMID: 37565374 PMCID: PMC10558696 DOI: 10.1002/advs.202301367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 07/11/2023] [Indexed: 08/12/2023]
Abstract
Lysine demethylase KDM7A removes histone modifications H3K9me1/2 and H3K27me1/2. KDM7A plays critical roles in gene expression and contribute to biological processes including tumorigenesis, metabolism, and embryonic development. However, the functions of KDM7A in mammalian nervous system are still poorly explored. In this study, functional roles of KDM7A are comprehensively investigated in neuronal cells by applying CUT&Tag-seq, RNA-seq and mice models. Knockdown of Kdm7a in N2A cells result in the alteration of histone modifications near transcription start sites (TSSs) and the expression changes of a large number of genes. In particular, the expression of immediate early genes (IEGs), a series of genes maintaining the function of the nervous system and associating with neurological disorders, are significantly decreased upon Kdm7a knockdown. Furthermore, in vivo knockdown of Kdm7a in dentate gyrus (DG) neuron of mice hippocampus, via Adeno-associated virus (AAV)-based stereotaxic microinjection, led to a significant decrease of the expression of c-Fos, a marker of neuron activity. Behavior assays in mice further revealed that Kdm7a knockdown in hippocampus repress neuron activity, which leading to impairment of emotion and memory. Collectively, the study reveals that KDM7A affects neuron functions by regulating IEGs, which may provide new clues for understanding epigenetic mechanisms in neurological disorders.
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Affiliation(s)
- Yifan Wang
- Key Laboratory of Metabolism and Molecular Medicine of Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical SciencesFudan University200032130 Dong An RoadShanghaiChina
| | - Qin Hong
- Shengli Clinical Medical College of Fujian Medical University, Center for Experimental Research in Clinical MedicineFujian Provincial Hospital134 East StreetFuzhou350001China
| | - Yueyue Xia
- Key Laboratory of Metabolism and Molecular Medicine of Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical SciencesFudan University200032130 Dong An RoadShanghaiChina
| | - Zhao Zhang
- Key Laboratory of Metabolism and Molecular Medicine of Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical SciencesFudan University200032130 Dong An RoadShanghaiChina
| | - Bo Wen
- Key Laboratory of Metabolism and Molecular Medicine of Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical SciencesFudan University200032130 Dong An RoadShanghaiChina
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12
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Rothschadl MJ, Sathyanesan M, Newton SS. Synergism of Carbamoylated Erythropoietin and Insulin-like Growth Factor-1 in Immediate Early Gene Expression. Life (Basel) 2023; 13:1826. [PMID: 37763230 PMCID: PMC10532867 DOI: 10.3390/life13091826] [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: 07/21/2023] [Revised: 08/23/2023] [Accepted: 08/28/2023] [Indexed: 09/29/2023] Open
Abstract
Trophic factors are secreted proteins that can modulate neuronal integrity, structure, and function. Previous preclinical studies have shown synergistic effects on decreasing apoptosis and improving behavioral performance after stroke when combining two such trophic factors, erythropoietin (EPO) and insulin-like growth factor-1 (IGF-1). However, EPO can elevate the hematocrit level, which can be life-threatening for non-anemic individuals. A chemically engineered derivative of EPO, carbamoylated EPO (CEPO), does not impact hematological parameters but retains neurotrophic effects similar to EPO. To obtain insight into CEPO and IGF-1 combination signaling, we examined immediate early gene (IEG) expression after treatment with CEPO, IGF-1, or CEPO + IGF-1 in rat pheochromocytoma (PC-12) cells and found that combining CEPO and IGF-1 produced a synergistic increase in IEG expression. An in vivo increase in the protein expression of Npas4 and Nptx2 was also observed in the rat hippocampus. We also examined which kinase signaling pathways might be mediating these effects and found that while AKT inhibition did not alter the pattern of IEG expression, both ERK and JAK2 inhibition significantly decreased IEG expression. These results begin to define the molecular effects of combining CEPO and IGF-1 and indicate the potential for these trophic factors to produce positive, synergistic effects.
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Affiliation(s)
| | | | - Samuel S. Newton
- Division of Basic Biomedical Sciences, Sanford School of Medicine, University of South Dakota, Vermillion, SD 57069, USA; (M.J.R.); (M.S.)
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13
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Yamada T, Yamamori Y, Matsuda N, Nagamune H, Ohkura K, Tomoyasu T, Tabata A. Streptolysin S induces pronounced calcium-ion influx-dependent expression of immediate early genes encoding transcription factors. Sci Rep 2023; 13:13720. [PMID: 37608082 PMCID: PMC10444759 DOI: 10.1038/s41598-023-40981-1] [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: 03/15/2023] [Accepted: 08/19/2023] [Indexed: 08/24/2023] Open
Abstract
Anginosus group streptococci (AGS) are opportunistic human pathogens of the oral cavity. The β-hemolytic subgroup of Streptococcus anginosus subsp. anginosus secretes streptolysin S (SLS) and exhibits not only hemolytic activity but also cytotoxicity toward cultured human cell lines. However, the detailed mechanism of action of SLS and the cellular responses of host cells have not yet been fully clarified. To determine the pathogenic potential of SLS-producing β-hemolytic S. anginosus subsp. anginosus, the SLS-dependent response induced in the human oral squamous cell carcinoma HSC-2 cells was investigated to determine the pathogenic potential of SLS-producing β-hemolytic S. anginosus subsp. anginosus. This study revealed that the Ca2+ influx and the expression of immediate early genes (IEGs) encoding transcription factors such as early growth responses (EGRs) and activator protein-1 (AP-1) were greatly increased in HSC-2 cells incubated with the culture supernatant of SLS-producing β-hemolytic S. anginosus subsp. anginosus. Moreover, this SLS-dependent increase in expression was significantly suppressed by Ca2+ chelation, except for jun. These results suggest that SLS caused Ca2+ influx into the cells following greatly enhanced expression of IEG-encoding transcription factors. The results of this study may help in understanding the pathogenicity of SLS-producing AGS.
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Affiliation(s)
- Takuya Yamada
- Department of Biological Science and Technology, Life System, Institute of Technology and Science, Tokushima University Graduate School, 2-1 Minamijousanjima-Cho, Tokushima, Tokushima, 770-8506, Japan
| | - Yugo Yamamori
- Faculty of Bioscience and Bioindustry, Bioengineering Course, Tokushima University, 2-1 Minamijousanjima-Cho, Tokushima, Tokushima, 770-8513, Japan
| | - Nanami Matsuda
- Faculty of Bioscience and Bioindustry, Bioengineering Course, Tokushima University, 2-1 Minamijousanjima-Cho, Tokushima, Tokushima, 770-8513, Japan
| | - Hideaki Nagamune
- Department of Biological Science and Technology, Life System, Institute of Technology and Science, Tokushima University Graduate School, 2-1 Minamijousanjima-Cho, Tokushima, Tokushima, 770-8506, Japan
- Faculty of Bioscience and Bioindustry, Bioengineering Course, Tokushima University, 2-1 Minamijousanjima-Cho, Tokushima, Tokushima, 770-8513, Japan
- Department of Bioengineering, Division of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University Graduate School, 2-1 Minamijousanjima-Cho, Tokushima, Tokushima, 770-8513, Japan
| | - Kazuto Ohkura
- Division of Clinical Pharmacy and Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Suzuka University of Medical Science, 3500-3 Minamitamagaki-Cho, Suzuka, Mie, 513-8670, Japan
| | - Toshifumi Tomoyasu
- Department of Biological Science and Technology, Life System, Institute of Technology and Science, Tokushima University Graduate School, 2-1 Minamijousanjima-Cho, Tokushima, Tokushima, 770-8506, Japan
- Faculty of Bioscience and Bioindustry, Bioengineering Course, Tokushima University, 2-1 Minamijousanjima-Cho, Tokushima, Tokushima, 770-8513, Japan
- Department of Bioengineering, Division of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University Graduate School, 2-1 Minamijousanjima-Cho, Tokushima, Tokushima, 770-8513, Japan
| | - Atsushi Tabata
- Department of Biological Science and Technology, Life System, Institute of Technology and Science, Tokushima University Graduate School, 2-1 Minamijousanjima-Cho, Tokushima, Tokushima, 770-8506, Japan.
- Faculty of Bioscience and Bioindustry, Bioengineering Course, Tokushima University, 2-1 Minamijousanjima-Cho, Tokushima, Tokushima, 770-8513, Japan.
- Department of Bioengineering, Division of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University Graduate School, 2-1 Minamijousanjima-Cho, Tokushima, Tokushima, 770-8513, Japan.
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14
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Dobryakova YV, Gerasimov K, Spivak YS, Korotkova T, Koryagina A, Deryabina A, Markevich VA, Bolshakov AP. The Induction of Long-Term Potentiation by Medial Septum Activation under Urethane Anesthesia Can Alter Gene Expression in the Hippocampus. Int J Mol Sci 2023; 24:12970. [PMID: 37629149 PMCID: PMC10454684 DOI: 10.3390/ijms241612970] [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: 06/28/2023] [Revised: 08/07/2023] [Accepted: 08/11/2023] [Indexed: 08/27/2023] Open
Abstract
We studied changes in the expression of early genes in hippocampal cells in response to stimulation of the dorsal medial septal area (dMSA), leading to long-term potentiation in the hippocampus. Rats under urethane anesthesia were implanted with stimulating electrodes in the ventral hippocampal commissure and dMSA and a recording electrode in the CA1 area of the hippocampus. We found that high-frequency stimulation (HFS) of the dMSA led to the induction of long-term potentiation in the synapses formed by the ventral hippocampal commissure on the hippocampal CA1 neurons. One hour after dMSA HFS, we collected the dorsal and ventral hippocampi on both the ipsilateral (damaged by the implanted electrode) and contralateral (intact) sides and analyzed the expression of genes by qPCR. The dMSA HFS led to an increase in the expression of bdnf and cyr61 in the ipsilateral hippocampi and egr1 in the ventral contralateral hippocampus. Thus, dMSA HFS under the conditions of degeneration of the cholinergic neurons in the medial septal area prevented the described increase in gene expression. The changes in cyr61 expression appeared to be dependent on the muscarinic M1 receptors. Our data suggest that the induction of long-term potentiation by dMSA activation enhances the expression of select early genes in the hippocampus.
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Affiliation(s)
| | | | | | | | | | | | | | - Alexey P. Bolshakov
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 117485 Moscow, Russia (K.G.)
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15
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Schulz L, Ramirez P, Lemieux A, Gonzalez E, Thomson T, Frost B. Tau-Induced Elevation of the Activity-Regulated Cytoskeleton Associated Protein Arc1 Causally Mediates Neurodegeneration in the Adult Drosophila Brain. Neuroscience 2023; 518:101-111. [PMID: 35487302 PMCID: PMC9606145 DOI: 10.1016/j.neuroscience.2022.04.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 04/18/2022] [Accepted: 04/21/2022] [Indexed: 11/24/2022]
Abstract
Alzheimer's disease and other tauopathies are neurodegenerative disorders pathologically defined by aggregated forms of tau protein in the brain. While synaptic degradation is a well-established feature of tau-induced neurotoxicity, the underlying mechanisms of how pathogenic forms of tau drive synaptic dysfunction are incompletely understood. Synaptic function and subsequent memory consolidation are dependent upon synaptic plasticity, the ability of synapses to adjust their structure and strength in response to changes in activity. The activity regulated cytoskeleton associated protein ARC acts in the nucleus and at postsynaptic densities to regulate various forms of synaptic plasticity. ARC harbors a retrovirus-like Gag domain that facilitates ARC multimerization and capsid formation. Trans-synaptic transfer of RNA-containing ARC capsids is required for synaptic plasticity. While ARC is elevated in brains of patients with Alzheimer's disease and genetic variants in ARC increase susceptibility to Alzheimer's disease, mechanistic insight into the role of ARC in Alzheimer's disease is lacking. Using a Drosophila model of tauopathy, we find that pathogenic tau significantly increases multimeric species of the protein encoded by the Drosophila homolog of ARC, Arc1, in the adult fly brain. We find that Arc1 is elevated within nuclei and the neuropil of tau transgenic Drosophila, but does not localize to synaptic vesicles or presynaptic terminals. Lastly, we find that genetic manipulation of Arc1 modifies tau-induced neurotoxicity, suggesting that tau-induced Arc1 elevation mediates neurodegeneration. Taken together, our results suggest that ARC elevation in human Alzheimer's disease is a consequence of tau pathology and is a causal factor contributing to neuronal death.
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Affiliation(s)
- Lulu Schulz
- Barshop Institute for Longevity and Aging Studies, San Antonio, TX, United States; Glenn Biggs Institute for Alzheimer's and Neurodegenerative Diseases, San Antonio, TX, United States; Department of Cell Systems and Anatomy, San Antonio, TX, United States; University of Texas Health San Antonio, San Antonio, TX, United States
| | - Paulino Ramirez
- Barshop Institute for Longevity and Aging Studies, San Antonio, TX, United States; Glenn Biggs Institute for Alzheimer's and Neurodegenerative Diseases, San Antonio, TX, United States; Department of Cell Systems and Anatomy, San Antonio, TX, United States; University of Texas Health San Antonio, San Antonio, TX, United States
| | - Adrienne Lemieux
- Department of Neurobiology, University of Massachusetts Medical School, Worcester, MA, United States
| | - Elias Gonzalez
- Barshop Institute for Longevity and Aging Studies, San Antonio, TX, United States; Glenn Biggs Institute for Alzheimer's and Neurodegenerative Diseases, San Antonio, TX, United States; Department of Cell Systems and Anatomy, San Antonio, TX, United States; University of Texas Health San Antonio, San Antonio, TX, United States
| | - Travis Thomson
- Department of Neurobiology, University of Massachusetts Medical School, Worcester, MA, United States
| | - Bess Frost
- Barshop Institute for Longevity and Aging Studies, San Antonio, TX, United States; Glenn Biggs Institute for Alzheimer's and Neurodegenerative Diseases, San Antonio, TX, United States; Department of Cell Systems and Anatomy, San Antonio, TX, United States; University of Texas Health San Antonio, San Antonio, TX, United States.
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16
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Kopaeva MY, Azieva AM, Cherepov AB, Zarayskaya IY. Lactoferrin Modulates Induction of Transcription Factor c-Fos in Neuronal Cultures. Int J Mol Sci 2023; 24:ijms24098373. [PMID: 37176079 PMCID: PMC10179438 DOI: 10.3390/ijms24098373] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 05/02/2023] [Accepted: 05/05/2023] [Indexed: 05/15/2023] Open
Abstract
Lactoferrin (Lf) is a multifunctional protein from the transferrin family. Of particular interest is the ability of Lf to affect a wide range of neuronal processes by modulating the expression of genes involved in long-term neuroplasticity. The expression of the immediate early gene c-fos that is rapidly activated in response to external influences, and its product, transcription factor c-Fos, is widely used as a marker of long-term neuronal plasticity. The present study aims to examine the effect of human Lf on the induction of transcription factor c-Fos in the primary mouse neuronal cultures after stimulation and to determine the cellular localization of human Lf and its colocalization with induced c-Fos protein. Primary dissociated cultures of hippocampal cells were obtained from the brains of newborn C57BL/6 mice (P0-P1). On day 7 of culturing, human Lf was added to the medium. After 24 h (day 8 in culture), c-Fos protein was induced in cells by triple application of 50 mM KCl. c-Fos content was analyzed using the immunofluorescent method 2 h after stimulation. Stimulation promoted exogenous Lf translocation into the nuclei of cultured neuronal cells, which correlated with increased induction of transcription factor c-Fos and was accompanied by nuclear colocalization of these proteins. These results attest to the potential of Lf as a modulator of neuronal processes and open up new prospects in studying the mechanisms of the regulatory effects of lactoferrin on cell function.
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Affiliation(s)
- Marina Yu Kopaeva
- National Research Center "Kurchatov Institute", 1 Akademika Kurchatova Sq., 123182 Moscow, Russia
| | - Asya M Azieva
- National Research Center "Kurchatov Institute", 1 Akademika Kurchatova Sq., 123182 Moscow, Russia
| | - Anton B Cherepov
- National Research Center "Kurchatov Institute", 1 Akademika Kurchatova Sq., 123182 Moscow, Russia
- Institute of General Pathology and Pathophysiology, 8 Baltiyskaya St., 125315 Moscow, Russia
| | - Irina Yu Zarayskaya
- Research Institute of Normal Physiology Named after P.K. Anokhin, 8 Baltiyskaya St., 125315 Moscow, Russia
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17
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Subach OM, Vlaskina AV, Agapova YK, Nikolaeva AY, Anokhin KV, Piatkevich KD, Patrushev MV, Boyko KM, Subach FV. Blue-to-Red TagFT, mTagFT, mTsFT, and Green-to-FarRed mNeptusFT2 Proteins, Genetically Encoded True and Tandem Fluorescent Timers. Int J Mol Sci 2023; 24:ijms24043279. [PMID: 36834686 PMCID: PMC9963904 DOI: 10.3390/ijms24043279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 02/01/2023] [Accepted: 02/03/2023] [Indexed: 02/10/2023] Open
Abstract
True genetically encoded monomeric fluorescent timers (tFTs) change their fluorescent color as a result of the complete transition of the blue form into the red form over time. Tandem FTs (tdFTs) change their color as a consequence of the fast and slow independent maturation of two forms with different colors. However, tFTs are limited to derivatives of the mCherry and mRuby red fluorescent proteins and have low brightness and photostability. The number of tdFTs is also limited, and there are no blue-to-red or green-to-far-red tdFTs. tFTs and tdFTs have not previously been directly compared. Here, we engineered novel blue-to-red tFTs, called TagFT and mTagFT, which were derived from the TagRFP protein. The main spectral and timing characteristics of the TagFT and mTagFT timers were determined in vitro. The brightnesses and photoconversions of the TagFT and mTagFT tFTs were characterized in live mammalian cells. The engineered split version of the TagFT timer matured in mammalian cells at 37 °C and allowed the detection of interactions between two proteins. The TagFT timer under the control of the minimal arc promoter, successfully visualized immediate-early gene induction in neuronal cultures. We also developed and optimized green-to-far-red and blue-to-red tdFTs, named mNeptusFT and mTsFT, which were based on mNeptune-sfGFP and mTagBFP2-mScarlet fusion proteins, respectively. We developed the FucciFT2 system based on the TagFT-hCdt1-100/mNeptusFT2-hGeminin combination, which could visualize the transitions between the G1 and S/G2/M phases of the cell cycle with better resolution than the conventional Fucci system because of the fluorescent color changes of the timers over time in different phases of the cell cycle. Finally, we determined the X-ray crystal structure of the mTagFT timer and analyzed it using directed mutagenesis.
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Affiliation(s)
- Oksana M. Subach
- Complex of NBICS Technologies, National Research Center “Kurchatov Institute”, Moscow 123182, Russia
| | - Anna V. Vlaskina
- Complex of NBICS Technologies, National Research Center “Kurchatov Institute”, Moscow 123182, Russia
| | - Yulia K. Agapova
- Complex of NBICS Technologies, National Research Center “Kurchatov Institute”, Moscow 123182, Russia
| | - Alena Y. Nikolaeva
- Complex of NBICS Technologies, National Research Center “Kurchatov Institute”, Moscow 123182, Russia
- Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Konstantin V. Anokhin
- Laboratory for Neurobiology of Memory, P.K. Anokhin Research Institute of Normal Physiology, Moscow 125315, Russia
- Institute for Advanced Brain Studies, M.V. Lomonosov Moscow State University, Moscow 119991, Russia
| | - Kiryl D. Piatkevich
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou 310024, China
- Institute of Basic Medical Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Maxim V. Patrushev
- Complex of NBICS Technologies, National Research Center “Kurchatov Institute”, Moscow 123182, Russia
| | - Konstantin M. Boyko
- Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Fedor V. Subach
- Complex of NBICS Technologies, National Research Center “Kurchatov Institute”, Moscow 123182, Russia
- Correspondence: ; Tel.: +7-499-196-7100-3389
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18
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Petazzi P, Jorge-Torres OC, Gomez A, Scognamiglio I, Serra-Musach J, Merkel A, Grases D, Xiol C, O’Callaghan M, Armstrong J, Esteller M, Guil S. Global Impairment of Immediate-Early Genes Expression in Rett Syndrome Models and Patients Linked to Myelination Defects. Int J Mol Sci 2023; 24:ijms24021453. [PMID: 36674969 PMCID: PMC9864472 DOI: 10.3390/ijms24021453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 12/14/2022] [Accepted: 12/29/2022] [Indexed: 01/15/2023] Open
Abstract
Rett syndrome (RTT) is a severe neurodevelopmental disease caused almost exclusively by mutations to the MeCP2 gene. This disease may be regarded as a synaptopathy, with impairments affecting synaptic plasticity, inhibitory and excitatory transmission and network excitability. The complete understanding of the mechanisms behind how the transcription factor MeCP2 so profoundly affects the mammalian brain are yet to be determined. What is known, is that MeCP2 involvement in activity-dependent expression programs is a critical link between this protein and proper neuronal activity, which allows the correct maturation of connections in the brain. By using RNA-sequencing analysis, we found several immediate-early genes (IEGs, key mediators of activity-dependent responses) directly bound by MeCP2 at the chromatin level and upregulated in the hippocampus and prefrontal cortex of the Mecp2-KO mouse. Quantification of the IEGs response to stimulus both in vivo and in vitro detected an aberrant expression pattern in MeCP2-deficient neurons. Furthermore, altered IEGs levels were found in RTT patient's peripheral blood and brain regions of post-mortem samples, correlating with impaired expression of downstream myelination-related genes. Altogether, these data indicate that proper IEGs expression is crucial for correct synaptic development and that MeCP2 has a key role in the regulation of IEGs.
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Affiliation(s)
- Paolo Petazzi
- Josep Carreras Leukemia Research Institute, School of Medicine, University of Barcelona, Carrer Casanova 143, 400° floor, 08036 Barcelona, Spain
- RICORS-TERAV, Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Olga Caridad Jorge-Torres
- Josep Carreras Leukaemia Research Institute (IJC), Badalona, 08916 Barcelona, Spain
- Correspondence: (O.C.J.-T.); (S.G.); Tel.: +34-935572828 (O.C.J.-T. & S.G.)
| | - Antonio Gomez
- Biosciences Department, Faculty of Sciences and Technology (FCT), University of Vic-Central University of Catalonia (UVic-UCC), C. de la Laura, 13, 08500 Vic, Spain
| | - Iolanda Scognamiglio
- Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), L’Hospitalet de Llobregat, 08908 Barcelona, Spain
| | - Jordi Serra-Musach
- Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), L’Hospitalet de Llobregat, 08908 Barcelona, Spain
| | - Angelika Merkel
- Josep Carreras Leukaemia Research Institute (IJC), Badalona, 08916 Barcelona, Spain
| | - Daniela Grases
- Josep Carreras Leukaemia Research Institute (IJC), Badalona, 08916 Barcelona, Spain
| | - Clara Xiol
- Fundación San Juan de Dios, 08950 Barcelona, Spain
- Servei de Medicina Genètica i Molecular, Institut de Recerca Pediàtrica, Hospital Sant Joan de Déu, 08950 Barcelona, Spain
| | - Mar O’Callaghan
- Clínica Rett, Neurology Department, Hospital Sant Joan de Déu, 08950 Barcelona, Spain
- CIBER-ER (Biomedical Network Research Center for Rare Diseases), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Judith Armstrong
- Servei de Medicina Genètica i Molecular, Institut de Recerca Pediàtrica, Hospital Sant Joan de Déu, 08950 Barcelona, Spain
- CIBER-ER (Biomedical Network Research Center for Rare Diseases), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Manel Esteller
- Josep Carreras Leukaemia Research Institute (IJC), Badalona, 08916 Barcelona, Spain
- Centro de Investigacion Biomedica en Red Cancer (CIBERONC), 28029 Madrid, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain
- Physiological Sciences Department, School of Medicine and Health Sciences, University of Barcelona (UB), 08907 Barcelona, Spain
| | - Sonia Guil
- Josep Carreras Leukaemia Research Institute (IJC), Badalona, 08916 Barcelona, Spain
- Germans Trias i Pujol Health Science Research Institute, Badalona, 08916 Barcelona, Spain
- Correspondence: (O.C.J.-T.); (S.G.); Tel.: +34-935572828 (O.C.J.-T. & S.G.)
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19
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Olfactory Stimulation Successfully Modulates the Neurochemical, Biochemical and Behavioral Phenotypes of the Visceral Pain. Molecules 2022; 27:molecules27217659. [DOI: 10.3390/molecules27217659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/24/2022] [Accepted: 11/02/2022] [Indexed: 11/09/2022] Open
Abstract
Visceral pain (VP) is the organ-derived nociception in which increased inflammatory reaction and exaggerated activation of the central nucleus of the amygdala (CeA) may contribute to this deficiency. Considering the amygdala also serves as the integration center for olfaction, the present study aimed to determine whether olfactory stimulation (OS) would effectively depress over-activation and inflammatory reaction in CeA, and successfully relieve VP-induced abnormalities. Adult rats subjected to intraperitoneal injection of acetic acid inhaled lavender essential oil for 2 or 4 h. The potential benefits of OS were determined by measuring the pro-inflammatory cytokine level, intracellular potassium and the upstream small-conductance calcium-activated potassium (SK) channel expression, together with detecting the stress transmitters that participated in the modulation of CeA activity. Results indicated that in VP rats, strong potassium intensity, reduced SK channel protein level, and increased corticotropin-releasing factor, c-fos, and substance P immuno-reactivities were detected in CeA. Enhanced CeA activation corresponded well with increased inflammatory reaction and decreased locomotion, respectively. However, in rats subjected to VP and received OS, all above parameters were significantly returned to normal levels with higher change detected in treating OS of 4h. As OS successfully depresses inflammation and CeA over-activation, application of OS may serve as an alternative and effective strategy to efficiently relieve VP-induced deficiency.
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20
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Ellison-Barnes A, Galiatsatos P. Initiating Pharmacologic Treatment in Tobacco-Dependent Adults. Med Clin North Am 2022; 106:1067-1080. [PMID: 36280333 DOI: 10.1016/j.mcna.2022.07.008] [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] [Indexed: 11/20/2022]
Abstract
There is a strong evidence base for the use of existing pharmacotherapies to support tobacco cessation, alone or in combination, ideally with concurrent behavioral interventions. Future pharmacotherapies under development may assist in the most refractory cases. Incorporating current and future therapies into a longitudinal chronic care model for tobacco dependence will help a diverse range of patients achieve independence from nicotine addiction.
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Affiliation(s)
- Alejandra Ellison-Barnes
- The Tobacco Treatment and Cancer Screening Clinic, The Johns Hopkins Health System, Baltimore, MD, USA; Division of General Internal Medicine, The Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Panagis Galiatsatos
- The Tobacco Treatment and Cancer Screening Clinic, The Johns Hopkins Health System, Baltimore, MD, USA; Division of Pulmonary and Critical Care Medicine, The Johns Hopkins School of Medicine, Baltimore, MD, USA.
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Barman B, Kushwaha A, Thakur MK. Muscarinic Acetylcholine Receptors-Mediated Activation of PKC Restores the Hippocampal Immediate Early Gene Expression and CREB Phosphorylation in Scopolamine-Induced Amnesic Mice. Mol Neurobiol 2022; 59:5722-5733. [DOI: 10.1007/s12035-022-02940-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 06/23/2022] [Indexed: 10/17/2022]
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Nambu MF, Lin YJ, Reuschenbach J, Tanaka KZ. What does engram encode?: Heterogeneous memory engrams for different aspects of experience. Curr Opin Neurobiol 2022; 75:102568. [PMID: 35660988 DOI: 10.1016/j.conb.2022.102568] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 04/26/2022] [Accepted: 05/01/2022] [Indexed: 01/03/2023]
Abstract
Long-lasting synaptic changes within the neuronal network mediate memory. Neurons bearing such physical traces of memory (memory engram cells) are often equated with neurons expressing immediate early genes (IEGs) during a specific experience. However, past studies observed the expression of different IEGs in non-overlapping neurons or synaptic plasticity in neurons that do not express a particular IEG. Importantly, recent studies revealed that distinct subsets of neurons expressing different IEGs or even IEG negative-(yet active) neurons support different aspects of memory or computation, suggesting a more complex nature of memory engram cells than previously thought. In this short review, we introduce studies revealing such heterogeneous composition of the memory engram and discuss how the memory system benefits from it.
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Affiliation(s)
- Miyu F Nambu
- Okinawa Institute of Science and Technology Graduate University (OIST), 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0495, Japan. https://twitter.com/meowmiyu
| | - Yu-Ju Lin
- Okinawa Institute of Science and Technology Graduate University (OIST), 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0495, Japan. https://twitter.com/linyuru25199808
| | - Josefine Reuschenbach
- Okinawa Institute of Science and Technology Graduate University (OIST), 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0495, Japan. https://twitter.com/Jausefine
| | - Kazumasa Z Tanaka
- Okinawa Institute of Science and Technology Graduate University (OIST), 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0495, Japan.
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Kovács LÁ, Füredi N, Ujvári B, Golgol A, Gaszner B. Age-Dependent FOSB/ΔFOSB Response to Acute and Chronic Stress in the Extended Amygdala, Hypothalamic Paraventricular, Habenular, Centrally-Projecting Edinger-Westphal, and Dorsal Raphe Nuclei in Male Rats. Front Aging Neurosci 2022; 14:862098. [PMID: 35592695 PMCID: PMC9110804 DOI: 10.3389/fnagi.2022.862098] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 04/04/2022] [Indexed: 11/29/2022] Open
Abstract
FOS proteins are early-responding gene products that contribute to the formation of activator protein-1. Several acute and chronic stimuli lead to Fos gene expression, accompanied by an increase of nuclear FOS, which appears to decline with aging. FOSB is another marker to detect acute cellular response, while ΔFOSB mirrors long-lasting changes in neuronal activity upon chronic stress. The notion that the occurrence of stress-related mood disorders shows some age dependence suggests that the brain's stress sensitivity is also a function of age. To study age-dependent stress vulnerability at the immediate-early gene level, we aimed to describe how the course of aging affects the neural responses of FOSB/ΔFOSB in the acute restraint stress (ARS), and chronic variable mild stress (CVMS) in male rats. Fourteen brain areas [central, medial, basolateral (BLA) amygdala; dorsolateral- (BNSTdl), oval- (BNSTov), dorsomedial-, ventral- (BNSTv), and fusiform- (BNSTfu) divisions of the bed nucleus of the stria terminalis; medial and lateral habenula, hypothalamic paraventricular nucleus (PVN), centrally-projecting Edinger-Westphal nucleus, dorsal raphe nucleus, barrel field of somatosensory cortex (S1)] were examined in the course of aging. Eight age groups [1-month-old (M), 1.5 M, 2 M, 3 M, 6 M, 12 M, 18 M, and 24 M] of rats were exposed to a single ARS vs. controls. In addition, rats in six age groups (2, 3, 6, 12, 18, and 24 M) were subjected to CVMS. The FOSB/ΔFOSB immunoreactivity (IR) was a function of age in both controls, ARS- and CVMS-exposed rats. ARS increased the FOSB/ΔFOSB in all nuclei (except in BLA), but only BNSTfu, BNSTv, and PVN reacted throughout the examined lifespan. The CVMS did not increase the FOSB/ΔFOSB in BLA, BNSTov, BNSTdl, and S1. PVN showed a constantly maintained FOSB/ΔFOSB IR during the examined life period. The maximum stress-evoked FOSB/ΔFOSB signal was detected at 2-3 M periods in the ARS- and at 6 M, 18 M in CVMS- model. Corresponding to our previous observations on FOS, the FOSB/ΔFOSB response to stress decreased with age in most of the examined nuclei. Only the PVN exerted a sustained age-independent FOSB/ΔFOSB, which may reflect the long-lasting adaptation response and plasticity of neurons that maintain the hypothalamus-pituitary-adrenal axis response throughout the lifespan.
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Affiliation(s)
- László Ákos Kovács
- Department of Anatomy, Research Group for Mood Disorders, Medical School, University of Pécs, Pécs, Hungary
- Center for Neuroscience & Szentagothai Research Center, Pécs University, Pécs, Hungary
| | - Nóra Füredi
- Department of Anatomy, Research Group for Mood Disorders, Medical School, University of Pécs, Pécs, Hungary
- Center for Neuroscience & Szentagothai Research Center, Pécs University, Pécs, Hungary
| | - Balázs Ujvári
- Department of Anatomy, Research Group for Mood Disorders, Medical School, University of Pécs, Pécs, Hungary
| | - Abolfazl Golgol
- Department of Anatomy, Research Group for Mood Disorders, Medical School, University of Pécs, Pécs, Hungary
| | - Balázs Gaszner
- Department of Anatomy, Research Group for Mood Disorders, Medical School, University of Pécs, Pécs, Hungary
- Center for Neuroscience & Szentagothai Research Center, Pécs University, Pécs, Hungary
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Lafon G, Geng H, Avarguès-Weber A, Buatois A, Massou I, Giurfa M. The Neural Signature of Visual Learning Under Restrictive Virtual-Reality Conditions. Front Behav Neurosci 2022; 16:846076. [PMID: 35250505 PMCID: PMC8888666 DOI: 10.3389/fnbeh.2022.846076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 01/21/2022] [Indexed: 11/22/2022] Open
Abstract
Honey bees are reputed for their remarkable visual learning and navigation capabilities. These capacities can be studied in virtual reality (VR) environments, which allow studying performances of tethered animals in stationary flight or walk under full control of the sensory environment. Here, we used a 2D VR setup in which a tethered bee walking stationary under restrictive closed-loop conditions learned to discriminate vertical rectangles differing in color and reinforcing outcome. Closed-loop conditions restricted stimulus control to lateral displacements. Consistently with prior VR analyses, bees learned to discriminate the trained stimuli. Ex vivo analyses on the brains of learners and non-learners showed that successful learning led to a downregulation of three immediate early genes in the main regions of the visual circuit, the optic lobes (OLs) and the calyces of the mushroom bodies (MBs). While Egr1 was downregulated in the OLs, Hr38 and kakusei were coincidently downregulated in the calyces of the MBs. Our work thus reveals that color discrimination learning induced a neural signature distributed along the sequential pathway of color processing that is consistent with an inhibitory trace. This trace may relate to the motor patterns required to solve the discrimination task, which are different from those underlying pathfinding in 3D VR scenarios allowing for navigation and exploratory learning and which lead to IEG upregulation.
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Affiliation(s)
- Gregory Lafon
- Research Center on Animal Cognition, Center for Integrative Biology, CNRS, University of Toulouse, Toulouse, France
| | - Haiyang Geng
- Research Center on Animal Cognition, Center for Integrative Biology, CNRS, University of Toulouse, Toulouse, France
- College of Animal Sciences (College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou, China
| | - Aurore Avarguès-Weber
- Research Center on Animal Cognition, Center for Integrative Biology, CNRS, University of Toulouse, Toulouse, France
| | - Alexis Buatois
- Research Center on Animal Cognition, Center for Integrative Biology, CNRS, University of Toulouse, Toulouse, France
| | - Isabelle Massou
- Research Center on Animal Cognition, Center for Integrative Biology, CNRS, University of Toulouse, Toulouse, France
| | - Martin Giurfa
- Research Center on Animal Cognition, Center for Integrative Biology, CNRS, University of Toulouse, Toulouse, France
- College of Animal Sciences (College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou, China
- Institut Universitaire de France, Paris, France
- *Correspondence: Martin Giurfa,
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Schuler H, Bonapersona V, Joëls M, Sarabdjitsingh RA. Effects of early life adversity on immediate early gene expression: Systematic review and 3-level meta-analysis of rodent studies. PLoS One 2022; 17:e0253406. [PMID: 35025862 PMCID: PMC8757918 DOI: 10.1371/journal.pone.0253406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 12/11/2021] [Indexed: 01/30/2023] Open
Abstract
Early-life adversity (ELA) causes long-lasting structural and functional changes to the brain, rendering affected individuals vulnerable to the development of psychopathologies later in life. Immediate-early genes (IEGs) provide a potential marker for the observed alterations, bridging the gap between activity-regulated transcription and long-lasting effects on brain structure and function. Several heterogeneous studies have used IEGs to identify differences in cellular activity after ELA; systematically investigating the literature is therefore crucial for comprehensive conclusions. Here, we performed a systematic review on 39 pre-clinical studies in rodents to study the effects of ELA (alteration of maternal care) on IEG expression. Females and IEGs other than cFos were investigated in only a handful of publications. We meta-analyzed publications investigating specifically cFos expression. ELA increased cFos expression after an acute stressor only if the animals (control and ELA) had experienced additional hits. At rest, ELA increased cFos expression irrespective of other life events, suggesting that ELA creates a phenotype similar to naïve, acutely stressed animals. We present a conceptual theoretical framework to interpret the unexpected results. Overall, ELA likely alters IEG expression across the brain, especially in interaction with other negative life events. The present review highlights current knowledge gaps and provides guidance to aid the design of future studies.
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Affiliation(s)
- Heike Schuler
- Department of Translational Neuroscience, University Medical Center Utrecht Brain Center, Utrecht University, Utrecht, The Netherlands
- Integrated Program in Neuroscience, McGill University, Montréal, QC, Canada
| | - Valeria Bonapersona
- Department of Translational Neuroscience, University Medical Center Utrecht Brain Center, Utrecht University, Utrecht, The Netherlands
- * E-mail:
| | - Marian Joëls
- Department of Translational Neuroscience, University Medical Center Utrecht Brain Center, Utrecht University, Utrecht, The Netherlands
- University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - R. Angela Sarabdjitsingh
- Department of Translational Neuroscience, University Medical Center Utrecht Brain Center, Utrecht University, Utrecht, The Netherlands
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Kondaurova EM, Plyusnina AV, Ilchibaeva TV, Eremin DV, Rodnyy AY, Grygoreva YD, Naumenko VS. Effects of a Cc2d1a/Freud-1 Knockdown in the Hippocampus on Behavior, the Serotonin System, and BDNF. Int J Mol Sci 2021; 22:ijms222413319. [PMID: 34948116 PMCID: PMC8707087 DOI: 10.3390/ijms222413319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/04/2021] [Accepted: 12/09/2021] [Indexed: 11/16/2022] Open
Abstract
The serotonin 5-HT1A receptor is one of the most abundant and widely distributed brain serotonin (5-HT) receptors that play a major role in the modulation of emotions and behavior. The 5-HT1A receptor gene (Htr1a) is under the control of transcription factor Freud-1 (also known as Cc2d1a/Freud-1). Here, using adeno-associated virus (AAV) constructs in vivo, we investigated effects of a Cc2d1a/Freud-1 knockdown in the hippocampus of C57BL/6J mice on behavior, the brain 5-HT system, and brain-derived neurotrophic factor (BDNF). AAV particles carrying the pAAV_H1-2_shRNA-Freud-1_Syn_EGFP plasmid encoding a short-hairpin RNA targeting mouse Cc2d1a/Freud-1 mRNA had an antidepressant effect in the forced swim test 5 weeks after virus injection. The knockdown impaired spatiotemporal memory as assessed in the Morris water maze. pAAV_H1-2_shRNA-Freud-1_Syn_EGFP decreased Cc2d1a/Freud-1 mRNA and protein levels. Furthermore, the Cc2d1a/Freud-1 knockdown upregulated 5-HT and its metabolite 5-hydroxyindoleacetic acid but not their ratio. The Cc2d1a/Freud-1 knockdown failed to increase mRNA and protein levels of Htr1a but diminished a 5-HT1A receptor functional response. Meanwhile, the Cc2d1a/Freud-1 knockdown reduced Creb mRNA expression and CREB phosphorylation and upregulated cFos mRNA. The knockdown enhanced the expression of a BDNF precursor (proBDNF protein), which is known to play a crucial part in neuroplasticity. Our data indicate that transcription factor Cc2d1a/Freud-1 is implicated in the pathogenesis of depressive disorders not only via the 5-HT1A receptor and transcription factor CREB but also through an influence on BDNF.
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Ojo ES, Ishola IO, Afolayan O, James AB, Ben-Azu B, Adeyemi OO. Cnestis ferruginea Vahl ex DC (Connaraceae) downregulates expression of immediate early genes in kainic acid-induced temporal lobe epilepsy in mice. Drug Metab Pers Ther 2021; 37:191-200. [PMID: 34881530 DOI: 10.1515/dmpt-2021-0145] [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: 05/08/2021] [Accepted: 07/09/2021] [Indexed: 11/15/2022]
Abstract
OBJECTIVES This study investigates the influence of Cnestis ferruginea (CF) on kainic acid (KA)-induced immediate early genes (IEGs) associated with hippocampal sclerosis in temporal lobe epilepsy (TLE) in mice. METHODS Animals were randomly divided into preventive treatment; vehicle (10 mL/kg, p.o.) or CF (400 mg/kg, p.o.) for three consecutive days before KA (5 mg/kg, i.p.) on days 4 and 5. In the reversal model, KA (5 mg/kg, i.p.) was administered on days 1 and 2 before CF (400 mg/kg) administration on days 3-5. Animals were euthanized on day 5, 6 h after KA exposure in preventive model and 1 h after CF administration in reversal model to estimate markers of IEGs. RESULTS KA upregulated the expression of c-Fos protein by 3.32-, 9.45-, 8.13-, and 8.66-fold in the hippocampal CA1, CA2, CA3, and DG regions, respectively. Also, KA elevated inducible nitric oxide synthase protein expression by 10.9-, 10.6-, 9.78-, and 9.51-fold. Besides, mRNA expression of brain-derived neurotrophic factors and heat shock protein was increased by 2.38- and 1.39-fold, respectively, after exposure to KA which were attenuated by CF. CONCLUSIONS CF attenuated KA-induced IEGs and could be used as an adjunct in TLE.
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Affiliation(s)
- Emmanuel S Ojo
- Department of Pharmacology, Therapeutics and Toxicology, Faculty of Basic Medical Sciences, College of Medicine, University of Lagos, Lagos, Lagos State, Nigeria
| | - Ismail O Ishola
- Department of Pharmacology, Therapeutics and Toxicology, Faculty of Basic Medical Sciences, College of Medicine, University of Lagos, Lagos, Lagos State, Nigeria
| | - Olasunmbo Afolayan
- Department of Anatomy, Faculty of Basic Medical Sciences, College of Medicine, University of Lagos, Lagos, Lagos State, Nigeria
| | - Ayorinde B James
- Department of Pharmacology and Therapeutics, Neuropharmacology Unit, College of Medicine, University of Ibadan, Ibadan, Oyo State, Nigeria
| | - Benneth Ben-Azu
- Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, Delta State University, Abraka, Delta State, Nigeria
| | - Olufunmilayo O Adeyemi
- Department of Pharmacology, Therapeutics and Toxicology, Faculty of Basic Medical Sciences, College of Medicine, University of Lagos, Lagos, Lagos State, Nigeria
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Consales C, Merla C, Benassi B, Garcia-Sanchez T, Muscat A, André FM, Marino C, Mir LM. Biological effects of ultrashort electric pulses in a neuroblastoma cell line: the energy density role. Int J Radiat Biol 2021; 98:109-121. [PMID: 34714724 DOI: 10.1080/09553002.2022.1998704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Despite the numerous literature results about biological effects of electromagnetic field (EMF) exposure, the interaction mechanisms of these fields with organisms are still a matter of debate. Extremely low frequency (ELF) MFs can modulate redox homeostasis and we showed that 24 h exposure to 50 Hz-1 mT has a pro-oxidant effect and effects on the epigenome of SH-SY5Y cells, decreasing miR-34b/c expression through the hypermethylation of their promoter. METHODS Here, we investigated the role of the electromagnetic deposited energy density (ED) during exposures lasting 24 h to 1 mT amplitude MFs at a frequency of 50 Hz in inducing the above mentioned effects. To this end, we delivered ultrashort electric pulses, in the range of microsecond and nanosecond duration, with the same ED of the previously performed magnetic exposure to SH-SY5Y cells. Furthermore, we explored the effect of higher deposited energy densities. Analysis of i) gene and microRNA expression, ii) cell morphology, iii) reactive oxygen species (ROS) generation, and iv) apoptosis were carried out. RESULTS We observed significant changes in egr-1 and c-fos expression at very low deposited ED levels, but no change of the ROS production, miR-34b/c expression, nor the appearance of indicators of apoptosis. We thus sought investigating changes in egr-1 and c-fos expression caused by ultrashort electric pulses at increasing deposited ED levels. The pulses with the higher deposited ED caused cell electroporation and even other morphological changes such as cell fusion. The changes in egr-1 and c-fos expression were more intense, but, again, no change of the ROS production, miR-34b/c expression, nor apoptosis induction was observed. CONCLUSIONS These results, showing that extremely low levels of electric stimulation (never investigated until now) can cause transcriptional changes, also reveal the safety of the electroporating pulses used in biomedical applications and open up the possibility to further therapeutic applications of this technology.
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Affiliation(s)
- Claudia Consales
- Division of Health Protection Technologies, ENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Rome, Italy
| | - Caterina Merla
- Division of Health Protection Technologies, ENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Rome, Italy
| | - Barbara Benassi
- Division of Health Protection Technologies, ENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Rome, Italy
| | - Tomás Garcia-Sanchez
- Institut Gustave Roussy, CNRS, Metabolic and Systemic Aspects of the Oncogenesis (METSY), Université Paris-Saclay, Villejuif, France.,Department of Information and Communication Technologies, Universitat Pompeu Fabra, Barcelona, Spain
| | - Adeline Muscat
- Institut Gustave Roussy, CNRS, Metabolic and Systemic Aspects of the Oncogenesis (METSY), Université Paris-Saclay, Villejuif, France
| | - Franck M André
- Institut Gustave Roussy, CNRS, Metabolic and Systemic Aspects of the Oncogenesis (METSY), Université Paris-Saclay, Villejuif, France
| | - Carmela Marino
- Division of Health Protection Technologies, ENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Rome, Italy
| | - Lluis M Mir
- Institut Gustave Roussy, CNRS, Metabolic and Systemic Aspects of the Oncogenesis (METSY), Université Paris-Saclay, Villejuif, France
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Glinert A, Turjeman S, Elliott E, Koren O. Microbes, metabolites and (synaptic) malleability, oh my! The effect of the microbiome on synaptic plasticity. Biol Rev Camb Philos Soc 2021; 97:582-599. [PMID: 34734461 PMCID: PMC9298272 DOI: 10.1111/brv.12812] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 10/10/2021] [Accepted: 10/22/2021] [Indexed: 12/15/2022]
Abstract
The microbiome influences the emotional and cognitive phenotype of its host, as well as the neurodevelopment and pathophysiology of various brain processes and disorders, via the well‐established microbiome–gut–brain axis. Rapidly accumulating data link the microbiome to severe neuropsychiatric disorders in humans, including schizophrenia, Alzheimer's and Parkinson's. Moreover, preclinical work has shown that perturbation of the microbiome is closely associated with social, cognitive and behavioural deficits. The potential of the microbiome as a diagnostic and therapeutic tool is currently undercut by a lack of clear mechanistic understanding of the microbiome–gut–brain axis. This review establishes the hypothesis that the mechanism by which this influence is carried out is synaptic plasticity – long‐term changes to the physical and functional neuronal structures that enable the brain to undertake learning, memory formation, emotional regulation and more. By examining the different constituents of the microbiome–gut–brain axis through the lens of synaptic plasticity, this review explores the diverse aspects by which the microbiome shapes the behaviour and mental wellbeing of the host. Key elements of this complex bi‐directional relationship include neurotransmitters, neuronal electrophysiology, immune mediators that engage with both the central and enteric nervous systems and signalling cascades that trigger long‐term potentiation of synapses. The importance of establishing mechanistic correlations along the microbiome–gut–brain axis cannot be overstated as they hold the potential for furthering current understanding regarding the vast fields of neuroscience and neuropsychiatry. This review strives to elucidate the promising theory of microbiome‐driven synaptic plasticity in the hope of enlightening current researchers and inspiring future ones.
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Affiliation(s)
- Ayala Glinert
- Azrieli Faculty of Medicine, Bar Ilan University, 8 Henrietta Szold, Safed, 1311502, Israel
| | - Sondra Turjeman
- Azrieli Faculty of Medicine, Bar Ilan University, 8 Henrietta Szold, Safed, 1311502, Israel
| | - Evan Elliott
- Azrieli Faculty of Medicine, Bar Ilan University, 8 Henrietta Szold, Safed, 1311502, Israel
| | - Omry Koren
- Azrieli Faculty of Medicine, Bar Ilan University, 8 Henrietta Szold, Safed, 1311502, Israel
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Shmakova AA, Rysenkova KD, Ivashkina OI, Gruzdeva AM, Klimovich PS, Popov VS, Rubina KA, Anokhin KV, Tkachuk VA, Semina EV. Early Induction of Neurotrophin Receptor and miRNA Genes in Mouse Brain after Pentilenetetrazole-Induced Neuronal Activity. BIOCHEMISTRY. BIOKHIMIIA 2021; 86:1326-1341. [PMID: 34903157 DOI: 10.1134/s0006297921100138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 06/21/2021] [Accepted: 06/30/2021] [Indexed: 06/14/2023]
Abstract
Neurotrophin receptors regulate neuronal survival and network formation, as well as synaptic plasticity in the brain via interaction with their ligands. Here, we examined early changes in the expression of neurotrophin receptor genes Ntk1 (TrkA), Ntrk2 (TrkB), Ntrk3 (TrkC), Ngfr (p75NTR) and miRNAs that target theses gens in the mouse brain after induction of seizure activity by pentylenetetrazol. We found that expression of Ntrk3 and Ngfr was upregulated in the cortex and the hippocampus 1-3 hours after the seizures, while Ntrk2 expression increased after 3-6 hours in the anterior cortex and after 1 and 6 hours in the hippocampus. At the same time, the ratio of Bcl-2/Bax signaling proteins increased in the anterior and posterior cortex, but not in the hippocampus, suggesting the activation of anti-apoptotic signaling. Expression of miRNA-9 and miRNA-29a, which were predicted to target Ntrk3, was upregulated in the hippocampus 3 hours after pentylenetetrazol injection. Therefore, early cellular response to seizures in the brain includes induction of the Ntrk2, Ntrk3, Ngfr, miRNA-9, and miRNA-29a expression, as well as activation of Bcl-2 and Bax signaling pathways, which may characterize them as important mediators of neuronal adaptation and survival upon induction of the generalized brain activity.
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Affiliation(s)
- Anna A Shmakova
- Faculty of Medicine, Lomonosov Moscow State University, Moscow, 119192, Russia
- Institute of Experimental Cardiology, National Cardiology Research Center of the Ministry of Health of the Russian Federation, Moscow, 121552, Russia
| | - Karina D Rysenkova
- Faculty of Medicine, Lomonosov Moscow State University, Moscow, 119192, Russia
- Institute of Experimental Cardiology, National Cardiology Research Center of the Ministry of Health of the Russian Federation, Moscow, 121552, Russia
| | - Olga I Ivashkina
- Institute for Advanced Brain Studies, Lomonosov Moscow State University, Moscow, 119192, Russian Federation
- Anokhin Research Institute of Normal Physiology, Moscow, 125315, Russia
- Kurchatov Institute National Research Center, Moscow, 123182, Russia
| | - Anna M Gruzdeva
- Institute for Advanced Brain Studies, Lomonosov Moscow State University, Moscow, 119192, Russian Federation
| | - Polina S Klimovich
- Faculty of Medicine, Lomonosov Moscow State University, Moscow, 119192, Russia
- Institute of Experimental Cardiology, National Cardiology Research Center of the Ministry of Health of the Russian Federation, Moscow, 121552, Russia
| | - Vladimir S Popov
- Faculty of Medicine, Lomonosov Moscow State University, Moscow, 119192, Russia
| | - Kseniya A Rubina
- Faculty of Medicine, Lomonosov Moscow State University, Moscow, 119192, Russia
| | - Konstantin V Anokhin
- Institute for Advanced Brain Studies, Lomonosov Moscow State University, Moscow, 119192, Russian Federation.
- Anokhin Research Institute of Normal Physiology, Moscow, 125315, Russia
| | - Vsevolod A Tkachuk
- Faculty of Medicine, Lomonosov Moscow State University, Moscow, 119192, Russia
- Institute of Experimental Cardiology, National Cardiology Research Center of the Ministry of Health of the Russian Federation, Moscow, 121552, Russia
| | - Ekaterina V Semina
- Faculty of Medicine, Lomonosov Moscow State University, Moscow, 119192, Russia.
- Institute of Experimental Cardiology, National Cardiology Research Center of the Ministry of Health of the Russian Federation, Moscow, 121552, Russia
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31
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Vitamin B 12-folic acid supplementation regulates neuronal immediate early gene expression and improves hippocampal dendritic arborization and memory in old male mice. Neurochem Int 2021; 150:105181. [PMID: 34509560 DOI: 10.1016/j.neuint.2021.105181] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 09/05/2021] [Accepted: 09/07/2021] [Indexed: 01/19/2023]
Abstract
As the relationship among diet, brain aging and memory is complex, it provides ample opportunity for research in multiple directions including behaviour, epigenetics and neuroplasticity. Nutritional deficiencies together with genetic and environmental factors are the major cause of many age-associated pathologies including memory loss. A compromised vitamin B12-folate status in older people is highly prevalent worldwide. Researchers have established a close association between the adequate level of B12-folate and the maintenance of cognitive brain functions. One of the main reasons for age-associated memory loss is downregulation of neuronal immediate early genes (nIEGs). Therefore, we hypothesize here that vitamin B12-folic acid supplementation in old mice can improve memory by altering the expression status of nIEGs. To check this, 72-week-old male Swiss albino mice were orally administered with 2 μg of vitamin B12 and 22 μg of folic acid/mouse/day for eight weeks. Such supplementation improved recognition memory in old and altered the expression of nIEGs. The expression of nIEGs was further found to be regulated by changes in DNA methylation at their promoter regions and CREB phosphorylation (pCREB). In addition, Golgi-Cox staining showed significant improvement in dendritic length, number of branching points and spine density of hippocampal CA1 pyramidal neurons by B12-folic acid supplementation. Taken together, these findings suggest that vitamin B12-folic acid supplementation regulates nIEGs expression and improves dendritic arborization of hippocampal neurons and memory in old male mice.
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Tilelli CQ, Flôres LR, Cota VR, Castro OWD, Garcia-Cairasco N. Amygdaloid complex anatomopathological findings in animal models of status epilepticus. Epilepsy Behav 2021; 121:106831. [PMID: 31864944 DOI: 10.1016/j.yebeh.2019.106831] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 11/15/2019] [Accepted: 11/25/2019] [Indexed: 12/13/2022]
Abstract
Temporal lobe epileptic seizures are one of the most common and well-characterized types of epilepsies. The current knowledge on the pathology of temporal lobe epilepsy relies strongly on studies of epileptogenesis caused by experimentally induced status epilepticus (SE). Although several temporal lobe structures have been implicated in the epileptogenic process, the hippocampal formation is the temporal lobe structure studied in the greatest amount and detail. However, studies in human patients and animal models of temporal lobe epilepsy indicate that the amygdaloid complex can be also an important seizure generator, and several pathological processes have been shown in the amygdala during epileptogenesis. Therefore, in the present review, we systematically selected, organized, described, and analyzed the current knowledge on anatomopathological data associated with the amygdaloid complex during SE-induced epileptogenesis. Amygdaloid complex participation in the epileptogenic process is evidenced, among others, by alterations in energy metabolism, circulatory, and fluid regulation, neurotransmission, immediate early genes expression, tissue damage, cell suffering, inflammation, and neuroprotection. We conclude that major efforts should be made in order to include the amygdaloid complex as an important target area for evaluation in future research on SE-induced epileptogenesis. This article is part of the Special Issue "NEWroscience 2018".
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Affiliation(s)
- Cristiane Queixa Tilelli
- Laboratory of Physiology, Campus Centro-Oeste Dona Lindu, Universidade Federal de São João del-Rei, Av. Sebastião Gonçalves Coelho, 400, Bairro Belvedere, Divinópolis, MG 35.501-296, Brazil.
| | - Larissa Ribeiro Flôres
- Laboratory of Physiology, Campus Centro-Oeste Dona Lindu, Universidade Federal de São João del-Rei, Av. Sebastião Gonçalves Coelho, 400, Bairro Belvedere, Divinópolis, MG 35.501-296, Brazil
| | - Vinicius Rosa Cota
- Laboratory of Neuroengineering and Neuroscience (LINNce), Department of Electrical Engineering, Campus Santo Antônio, Universidade Federal de São João del-Rei, Praça Frei Orlando, 170, Centro, São João Del Rei, MG 36307-352, Brazil
| | - Olagide Wagner de Castro
- Institute of Biological Sciences and Health, Campus A. C. Simões, Universidade Federal de Alagoas, Av. Lourival Melo Mota, s/n, Tabuleiro do Martins, Maceió, AL 57072-970, Brazil
| | - Norberto Garcia-Cairasco
- Neurophysiology and Experimental Neuroethology Laboratory (LNNE), Department of Physiology, School of Medicine, Universidade de São Paulo, Av. Bandeirantes, 3900, Monte Alegre, Ribeirão Preto, SP 14049-900, Brazil.
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Wang F, Sun W, Chang L, Sun K, Hou L, Qian L, Jin C, Chen J, Pu J, Ye P, Qiu S, Luo J, Duan S, Zhang B, Gao Z, Hu X. cFos-ANAB: A cFos-based Web Tool for Exploring Activated Neurons and Associated Behaviors. Neurosci Bull 2021; 37:1441-1453. [PMID: 34302617 DOI: 10.1007/s12264-021-00744-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 02/16/2021] [Indexed: 02/08/2023] Open
Abstract
cFos is one of the most widely-studied genes in the field of neuroscience. Currently, there is no systematic database focusing on cFos in neuroscience. We developed a curated database-cFos-ANAB-a cFos-based web tool for exploring activated neurons and associated behaviors in rats and mice, comprising 398 brain nuclei and sub-nuclei, and five associated behaviors: pain, fear, feeding, aggression, and sexual behavior. Direct relationships among behaviors and nuclei (even cell types) under specific stimulating conditions were constructed based on cFos expression profiles extracted from original publications. Moreover, overlapping nuclei and sub-nuclei with potentially complex functions among different associated behaviors were emphasized, leading to results serving as important clues to the development of valid hypotheses for exploring as yet unknown circuits. Using the analysis function of cFos-ANAB, multi-layered pictures of networks and their relationships can quickly be explored depending on users' purposes. These features provide a useful tool and good reference for early exploration in neuroscience. The cFos-ANAB database is available at www.cfos-db.net .
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Affiliation(s)
- Fan Wang
- Center for Neuroscience and Department of Neurology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Wenjie Sun
- Medical Information Center, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Lei Chang
- Medical Information Center, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Kefang Sun
- Medical Information Center, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Leying Hou
- Medical Information Center, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Linna Qian
- Medical Information Center, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Chaoyin Jin
- Medical Information Center, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Jiandong Chen
- Medical Information Center, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Jiali Pu
- Department of Neurology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, China
| | - Panmeng Ye
- Hangzhou Hikvision Digital Technology Co., Ltd, Hangzhou, 310053, China
| | - Shuang Qiu
- Center for Neuroscience and Department of Neurology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Jianhong Luo
- Center for Neuroscience and Department of Neurology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Shumin Duan
- Center for Neuroscience and Department of Neurology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Baorong Zhang
- Department of Neurology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, China.
| | - Zhihua Gao
- Center for Neuroscience and Department of Neurology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China.
| | - Xiaojun Hu
- Medical Information Center, Zhejiang University School of Medicine, Hangzhou, 310058, China. .,Department of Neurology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, China.
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Stress Diminishes BDNF-stimulated TrkB Signaling, TrkB-NMDA Receptor Linkage and Neuronal Activity in the Rat Brain. Neuroscience 2021; 473:142-158. [PMID: 34298123 DOI: 10.1016/j.neuroscience.2021.07.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 07/08/2021] [Accepted: 07/13/2021] [Indexed: 11/21/2022]
Abstract
Exposure to intense or repeated stressors can lead to depression or post-traumatic stress disorder (PTSD). Neurological changes induced by stress include impaired neurotrophin signaling, which is known to influence synaptic integrity and plasticity. The present study used an ex vivo approach to examine the impact of acute or repeated stress on BDNF-stimulated TrkB signaling in hippocampus (HIPPO) and prefrontal cortex (PFC). Rats in an acute multiple stressor group experienced five stressors in one day whereas rats in a repeated unpredictable stressor group experienced 20 stressors across 10 days. After stress exposure, slices were incubated with vehicle or BDNF, followed by immunoprecipitation and immunoblot assays to assess protein levels, activation states and protein-protein linkage associated with BDNF-TrkB signaling. Three key findings are (1) exposure to stressors significantly diminished BDNF-stimulated TrkB signaling in HIPPO and PFC such that reductions in TrkB activation, diminished recruitment of adaptor proteins to TrkB, reduced activation of downstream signaling molecules, disruption of TrkB-NMDAr linkage, and changes in basal and BDNF-stimulated Arc expression were observed. (2) After stress, BDNF stimulation enhanced TrkB-NMDAr linkage in PFC, suggestive of compensatory mechanisms in this region. (3) We discovered an uncoupling between TrkB signaling, TrkB-NMDAr linkage and Arc expression in PFC and HIPPO. In addition, a robust surge in pro-inflammatory cytokines was observed in both regions after repeated exposure to stressors. Collectively, these data provide therapeutic targets for future studies that investigate how to reverse stress-induced downregulation of BDNF-TrkB signaling and underscore the need for functional studies that examine stress-related TrkB-NMDAr activities in PFC.
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Bie F, Wang K, Xu T, Yuan J, Ding H, Lv B, Liu Y, Lan M. The potential roles of circular RNAs as modulators in traumatic spinal cord injury. Biomed Pharmacother 2021; 141:111826. [PMID: 34328121 DOI: 10.1016/j.biopha.2021.111826] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 06/07/2021] [Accepted: 06/11/2021] [Indexed: 02/08/2023] Open
Abstract
Spinal cord injury (SCI) may cause long-term physical impairment and bring a substantial burden to both the individual patient and society. Existing therapeutic approaches for SCI have proven inadequate. This is mainly owing to the incomplete understanding of the cellular and molecular events post-injury. Circular RNAs (circRNAs) represent a new class of non-coding RNAs with a covalently closed annular structure that participates in regulating the transcription of certain genes and are linked to various biological processes and diseases. Mounting evidence is indicative that circRNAs are highly expressed in the spinal cord and they play key roles in multiple processes of neurological diseases. Recently, a role for circRNAs as effectors of SCI has emerged, leading to the continuity of relevant research. In this review, we presented current studies with regards to the abnormality of circRNAs mediating SCI by affecting mechanisms of autophagy, apoptosis, inflammation, and neural regeneration. Furthermore, the potential clinical value of circRNAs as therapeutic targets of SCI was also analyzed.
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Affiliation(s)
- Fan Bie
- Department of Rehabilitation Medicine, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu 212002, China.
| | - Kaiyang Wang
- Department of Orthopedics, Shanghai Jiao Tong University Sixth People's Hospital, Shanghai 200233, China.
| | - Tao Xu
- Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, China.
| | - Jishan Yuan
- Department of Orthopedics, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu 212002, China.
| | - Hua Ding
- Department of Orthopedics, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu 212002, China.
| | - Bin Lv
- Department of Orthopedics, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu 212002, China; Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
| | - Yuwen Liu
- Department of Orthopedics, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, China.
| | - Min Lan
- Department of Rehabilitation Medicine, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu 212002, China.
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Optogenetic Manipulation of Olfactory Responses in Transgenic Zebrafish: A Neurobiological and Behavioral Study. Int J Mol Sci 2021; 22:ijms22137191. [PMID: 34281244 PMCID: PMC8269104 DOI: 10.3390/ijms22137191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 07/01/2021] [Indexed: 11/18/2022] Open
Abstract
Olfaction is an important neural system for survival and fundamental behaviors such as predator avoidance, food finding, memory formation, reproduction, and social communication. However, the neural circuits and pathways associated with the olfactory system in various behaviors are not fully understood. Recent advances in optogenetics, high-resolution in vivo imaging, and reconstructions of neuronal circuits have created new opportunities to understand such neural circuits. Here, we generated a transgenic zebrafish to manipulate olfactory signal optically, expressing the Channelrhodopsin (ChR2) under the control of the olfactory specific promoter, omp. We observed light-induced neuronal activity of olfactory system in the transgenic fish by examining c-fos expression, and a calcium indicator suggesting that blue light stimulation caused activation of olfactory neurons in a non-invasive manner. To examine whether the photo-activation of olfactory sensory neurons affect behavior of zebrafish larvae, we devised a behavioral choice paradigm and tested how zebrafish larvae choose between two conflicting sensory cues, an aversive odor or the naturally preferred phototaxis. We found that when the conflicting cues (the preferred light and aversive odor) were presented together simultaneously, zebrafish larvae swam away from the aversive odor. However, the transgenic fish with photo-activation were insensitive to the aversive odor and exhibited olfactory desensitization upon optical stimulation of ChR2. These results show that an aversive olfactory stimulus can override phototaxis, and that olfaction is important in decision making in zebrafish. This new transgenic model will be useful for the analysis of olfaction related behaviors and for the dissection of underlying neural circuits.
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Wong Fong Sang IE, Schroer J, Halbhuber L, Warm D, Yang JW, Luhmann HJ, Kilb W, Sinning A. Optogenetically Controlled Activity Pattern Determines Survival Rate of Developing Neocortical Neurons. Int J Mol Sci 2021; 22:6575. [PMID: 34205237 PMCID: PMC8235092 DOI: 10.3390/ijms22126575] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 06/16/2021] [Accepted: 06/16/2021] [Indexed: 12/29/2022] Open
Abstract
A substantial proportion of neurons undergoes programmed cell death (apoptosis) during early development. This process is attenuated by increased levels of neuronal activity and enhanced by suppression of activity. To uncover whether the mere level of activity or also the temporal structure of electrical activity affects neuronal death rates, we optogenetically controlled spontaneous activity of synaptically-isolated neurons in developing cortical cultures. Our results demonstrate that action potential firing of primary cortical neurons promotes neuronal survival throughout development. Chronic patterned optogenetic stimulation allowed to effectively modulate the firing pattern of single neurons in the absence of synaptic inputs while maintaining stable overall activity levels. Replacing the burst firing pattern with a non-physiological, single pulse pattern significantly increased cell death rates as compared to physiological burst stimulation. Furthermore, physiological burst stimulation led to an elevated peak in intracellular calcium and an increase in the expression level of classical activity-dependent targets but also decreased Bax/BCL-2 expression ratio and reduced caspase 3/7 activity. In summary, these results demonstrate at the single-cell level that the temporal pattern of action potentials is critical for neuronal survival versus cell death fate during cortical development, besides the pro-survival effect of action potential firing per se.
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Affiliation(s)
| | | | | | | | | | | | | | - Anne Sinning
- Institute of Physiology, University Medical Center Mainz, Johannes Gutenberg University, Duesbergweg 6, 55128 Mainz, Germany; (I.E.W.F.S.); (J.S.); (L.H.); (D.W.); (J.-W.Y.); (H.J.L.); (W.K.)
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Inoue T, Takamatsu Y, Okamura M, Mani H, Hasegawa N, Maejima H. Specific inhibition of α5 subunit-containing GABA A receptors enhances locomotor activity and neuronal activity in the motor cortex. Biomed Res 2021; 42:103-108. [PMID: 34092751 DOI: 10.2220/biomedres.42.103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Gamma-aminobutyric acid (GABA) is a major inhibitory neurotransmitter in the central nervous system (CNS). This study examined the effect of specific inhibition of α5 subunit-containing GABAA receptors (α5GABAAR) on the behavioral profile and neuronal activity of the CNS using a compound called L-655,708, which is a selective negative allosteric modulator of α5GABAAR. L-655,708 administration significantly increased locomotor activity without anxiety-related behavior. Furthermore, L-655,708 administration significantly increased c-Fos mRNA expression (a neuronal activity marker) in motor area of the cerebral cortex, whereas it hardly altered c-Fos mRNA expression in the sensory cortex, hippocampus, and spinal cord. This study revealed for the first time that alteration of neuronal activity with specific inhibition of α5GABAAR differs depending on each CNS region. α5GABAAR could be a potential target for modulating CNS excitability and behavioral activity.
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Affiliation(s)
- Takahiro Inoue
- Graduate School of Health Sciences, Hokkaido University.,Research Fellow of Japan Society for the Promotion of Science
| | - Yasuyuki Takamatsu
- Department of Rehabilitation Science, Faculty of Health Sciences, Hokkaido University
| | | | - Hiroki Mani
- Department of Rehabilitation Science, Faculty of Health Sciences, Hokkaido University
| | - Naoya Hasegawa
- Department of Rehabilitation Science, Faculty of Health Sciences, Hokkaido University
| | - Hiroshi Maejima
- Department of Rehabilitation Science, Faculty of Health Sciences, Hokkaido University
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Garay PM, Chen A, Tsukahara T, Rodríguez Díaz JC, Kohen R, Althaus JC, Wallner MA, Giger RJ, Jones KS, Sutton MA, Iwase S. RAI1 Regulates Activity-Dependent Nascent Transcription and Synaptic Scaling. Cell Rep 2021; 32:108002. [PMID: 32783930 PMCID: PMC7418709 DOI: 10.1016/j.celrep.2020.108002] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 06/17/2020] [Accepted: 07/15/2020] [Indexed: 12/15/2022] Open
Abstract
Long-lasting forms of synaptic plasticity such as synaptic scaling are critically dependent on transcription. Activity-dependent transcriptional dynamics in neurons, however, remain incompletely characterized because most previous efforts relied on measurement of steady-state mRNAs. Here, we use nascent RNA sequencing to profile transcriptional dynamics of primary neuron cultures undergoing network activity shifts. We find pervasive transcriptional changes, in which ∼45% of expressed genes respond to network activity shifts. We further link retinoic acid-induced 1 (RAI1), the Smith-Magenis syndrome gene, to the transcriptional program driven by reduced network activity. Remarkable agreement among nascent transcriptomes, dynamic chromatin occupancy of RAI1, and electrophysiological properties of Rai1-deficient neurons demonstrates the essential roles of RAI1 in suppressing synaptic upscaling in the naive network, while promoting upscaling triggered by activity silencing. These results highlight the utility of bona fide transcription profiling to discover mechanisms of activity-dependent chromatin remodeling that underlie normal and pathological synaptic plasticity. BrU-seq reveals nascent transcription during synaptic up- or downscaling Smith-Magenis syndrome protein RAI1 regulates upscaling-associated transcription RAI1 departs chromatin in response to network activity shifts RAI1 blocks upscaling in naive networks and promotes inactivity-induced upscaling
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Affiliation(s)
- Patricia M Garay
- Neuroscience Graduate Program, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Alex Chen
- Neuroscience Graduate Program, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Takao Tsukahara
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109, USA; Michigan Neuroscience Institute, University of Michigan, Ann Arbor, MI 48109, USA; Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109, USA
| | | | - Rafi Kohen
- Neuroscience Graduate Program, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - J Christian Althaus
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109, USA; Michigan Neuroscience Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Margarete A Wallner
- College of Literature, Science, and the Arts, University of Michigan, Ann Arbor, MI 48109, USA
| | - Roman J Giger
- Neuroscience Graduate Program, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA; Cellular and Molecular Biology Graduate Program, University of Michigan Medical School, Ann Arbor, MI, 48109, USA; Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Kevin S Jones
- Neuroscience Graduate Program, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Michael A Sutton
- Neuroscience Graduate Program, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109, USA; Michigan Neuroscience Institute, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Shigeki Iwase
- Neuroscience Graduate Program, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109, USA.
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Meade GM, Charron LS, Kilburn LW, Pei Z, Wang HY, Robinson S. A model of negative emotional contagion between male-female rat dyads: Effects of voluntary exercise on stress-induced behavior and BDNF-TrkB signaling. Physiol Behav 2021; 234:113286. [DOI: 10.1016/j.physbeh.2020.113286] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 12/08/2020] [Accepted: 12/09/2020] [Indexed: 12/19/2022]
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Masuo Y, Satou T, Takemoto H, Koike K. Smell and Stress Response in the Brain: Review of the Connection between Chemistry and Neuropharmacology. Molecules 2021; 26:molecules26092571. [PMID: 33924992 PMCID: PMC8124235 DOI: 10.3390/molecules26092571] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/16/2021] [Accepted: 04/17/2021] [Indexed: 11/24/2022] Open
Abstract
The stress response in the brain is not fully understood, although stress is one of the risk factors for developing mental disorders. On the other hand, the stimulation of the olfactory system can influence stress levels, and a certain smell has been empirically known to have a stress-suppressing effect, indeed. In this review, we first outline what stress is and previous studies on stress-responsive biomarkers (stress markers) in the brain. Subsequently, we confirm the olfactory system and review previous studies on the relationship between smell and stress response by species, such as humans, rats, and mice. Numerous studies demonstrated the stress-suppressing effects of aroma. There are also investigations showing the effects of odor that induce stress in experimental animals. In addition, we introduce recent studies on the effects of aroma of coffee beans and essential oils, such as lavender, cypress, α-pinene, and thyme linalool on the behavior and the expression of stress marker candidates in the brain. The transfer of volatile components into the brain is also discussed while using the results of thyme linalool as an example. These studies may provide a good opportunity to connect chemical research at the molecular level with neuropharmacological approaches in the future.
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Affiliation(s)
- Yoshinori Masuo
- Laboratory of Neuroscience, Department of Biology, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan
- Correspondence: ; Tel.: +81-47-472-5257
| | - Tadaaki Satou
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan;
| | - Hiroaki Takemoto
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan; (H.T.); (K.K.)
| | - Kazuo Koike
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan; (H.T.); (K.K.)
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Neural substrates involved in the cognitive information processing in teleost fish. Anim Cogn 2021; 24:923-946. [PMID: 33907938 PMCID: PMC8360893 DOI: 10.1007/s10071-021-01514-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 02/25/2021] [Accepted: 03/06/2021] [Indexed: 02/04/2023]
Abstract
Over the last few decades, it has been shown that fish, comprising the largest group of vertebrates and in many respects one of the least well studied, possess many cognitive abilities comparable to those of birds and mammals. Despite a plethora of behavioural studies assessing cognition abilities and an abundance of neuroanatomical studies, only few studies have aimed to or in fact identified the neural substrates involved in the processing of cognitive information. In this review, an overview of the currently available studies addressing the joint research topics of cognitive behaviour and neuroscience in teleosts (and elasmobranchs wherever possible) is provided, primarily focusing on two fundamentally different but complementary approaches, i.e. ablation studies and Immediate Early Gene (IEG) analyses. More recently, the latter technique has become one of the most promising methods to visualize neuronal populations activated in specific brain areas, both during a variety of cognitive as well as non-cognition-related tasks. While IEG studies may be more elegant and potentially easier to conduct, only lesion studies can help researchers find out what information animals can learn or recall prior to and following ablation of a particular brain area.
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Vu TD, Iwasaki Y, Oshima K, Chiu MT, Nikaido M, Okada N. A unique neurogenomic state emerges after aggressive confrontations in males of the fish Betta splendens. Gene 2021; 784:145601. [PMID: 33766705 DOI: 10.1016/j.gene.2021.145601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 03/01/2021] [Accepted: 03/17/2021] [Indexed: 12/13/2022]
Abstract
Territorial defense involves frequent aggressive confrontations with competitors, but little is known about how brain-transcriptomic profiles change between individuals competing for territory establishment. Our previous study elucidated that when two fish Betta splendens males interact, transcriptomes across their brains synchronize in a way that reflects a mutual assessment process between them at the gene expression level. Here we aim to evaluate how the brain-transcriptomic profiles of opponents change immediately after shifting their social status (i.e., the winner/loser has emerged) and 30 min after this shift. We showed that changes in the expression of certain genes are unique to different fighting stages and the expression patterns of certain genes are transiently or persistently changed across all fighting stages. These brain transcriptomic responses are in accordance with behavioral changes across the fight. Strikingly, the specificity of the brain-transcriptomic synchronization of a pair during fighting was gradually lost after fighting ceased, leading to the emergence of a basal neurogenomic state in which the changes in gene expression were reduced to minimum and consistent across all individuals. This state shares common characteristics with the hibernation state that animals adopt to minimize their metabolic rates to save energy. Interestingly, expression changes for genes related to metabolism, autism spectrum disorder, and long-term memory still differentiated losers from winners. Together, the fighting system using male B. splendens provides a promising platform for investigating neurogenomic states of aggression in vertebrates.
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Affiliation(s)
- Trieu-Duc Vu
- School of Pharmacy, Kitasato University, Tokyo, Japan; School of Life Science and Technology, Tokyo Institute of Technology, Tokyo, Japan; Department of Life Sciences, National Cheng Kung University, Tainan, Taiwan
| | - Yuki Iwasaki
- Nagahama Institute of Bio-Science and Technology, Nagahama, Japan
| | | | - Ming-Tzu Chiu
- Department of Life Sciences, National Cheng Kung University, Tainan, Taiwan
| | - Masato Nikaido
- School of Life Science and Technology, Tokyo Institute of Technology, Tokyo, Japan
| | - Norihiro Okada
- School of Pharmacy, Kitasato University, Tokyo, Japan; Department of Life Sciences, National Cheng Kung University, Tainan, Taiwan; Nagahama Institute of Bio-Science and Technology, Nagahama, Japan.
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44
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Kang JWM, Mor D, Keay KA. Nerve injury alters restraint-induced activation of the basolateral amygdala in male rats. Brain Struct Funct 2021; 226:1209-1227. [PMID: 33582845 DOI: 10.1007/s00429-021-02235-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 01/28/2021] [Indexed: 01/05/2023]
Abstract
The amygdala is critical for the production of appropriate responses towards emotional or stressful stimuli. It has a characteristic neuronal activation pattern to acute stressors. Chronic pain and acute stress have each been shown to independently modulate the activity of the amygdala. Few studies have investigated the effect of pain or injury, on amygdala activation to acute stress. This study investigated the effects of a neuropathic injury on the activation response of the amygdala to an acute restraint stress. Chronic constriction injury of the right sciatic nerve (CCI) was used to create neuropathic injury and a single brief 15-min acute restraint was used as an emotional/psychological stressor. All rats received cholera toxin B (CTB) retrograde tracer injections into the medial prefrontal cortex (mPFC) to assess if the amygdala to mPFC pathway was specifically regulated by the combination of neuropathic injury and acute stress. To assess differential patterns of activity in amygdala subregions, cFos expression was used as a marker for "acute", restraint triggered neuronal activation, and FosB/ΔFosB expression was used to reveal prolonged neuronal activation/sensitisation triggered by CCI. Restraint resulted in a characteristic increase in cFos expression in the medial amygdala, which was not altered by CCI. Rats with a CCI showed increased cFos expression in the basolateral amygdala (BLA), in response to an acute restraint stress, but not in neurons projecting to the prefrontal cortex. Further, CCI rats showed an increase in FosB/ΔFosB expression which was exclusive to the BLA. This increase likely reflects sensitisation of the BLA as a consequence of nerve injury which may contribute to heightened sensitivity of BLA neurons to acute emotional/ psychological stressors.
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Affiliation(s)
- James W M Kang
- Faculty of Medicine and Health, School of Medical Sciences (Neuroscience), The University of Sydney, Sydney, NSW, 2006, Australia. .,Brain and Mind Centre (M02G), 100 Mallet Street, Camperdown, NSW, 2050, Australia.
| | - David Mor
- Faculty of Medicine and Health, School of Medical Sciences (Neuroscience), The University of Sydney, Sydney, NSW, 2006, Australia
| | - Kevin A Keay
- Faculty of Medicine and Health, School of Medical Sciences (Neuroscience), The University of Sydney, Sydney, NSW, 2006, Australia.,Brain and Mind Centre (M02G), 100 Mallet Street, Camperdown, NSW, 2050, Australia
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45
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Jonkhout N, Cruciani S, Santos Vieira HG, Tran J, Liu H, Liu G, Pickford R, Kaczorowski D, Franco GR, Vauti F, Camacho N, Abedini SS, Najmabadi H, Ribas de Pouplana L, Christ D, Schonrock N, Mattick JS, Novoa EM. Subcellular relocalization and nuclear redistribution of the RNA methyltransferases TRMT1 and TRMT1L upon neuronal activation. RNA Biol 2021; 18:1905-1919. [PMID: 33499731 DOI: 10.1080/15476286.2021.1881291] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
RNA modifications are dynamic chemical entities that expand the RNA lexicon and regulate RNA fate. The most abundant modification present in mRNAs, N6-methyladenosine (m6A), has been implicated in neurogenesis and memory formation. However, whether additional RNA modifications may be playing a role in neuronal functions and in response to environmental queues is largely unknown. Here we characterize the biochemical function and cellular dynamics of two human RNA methyltransferases previously associated with neurological dysfunction, TRMT1 and its homolog, TRMT1-like (TRMT1L). Using a combination of next-generation sequencing, LC-MS/MS, patient-derived cell lines and knockout mouse models, we confirm the previously reported dimethylguanosine (m2,2G) activity of TRMT1 in tRNAs, as well as reveal that TRMT1L, whose activity was unknown, is responsible for methylating a subset of cytosolic tRNAAla(AGC) isodecoders at position 26. Using a cellular in vitro model that mimics neuronal activation and long term potentiation, we find that both TRMT1 and TRMT1L change their subcellular localization upon neuronal activation. Specifically, we observe a major subcellular relocalization from mitochondria and other cytoplasmic domains (TRMT1) and nucleoli (TRMT1L) to different small punctate compartments in the nucleus, which are as yet uncharacterized. This phenomenon does not occur upon heat shock, suggesting that the relocalization of TRMT1 and TRMT1L is not a general reaction to stress, but rather a specific response to neuronal activation. Our results suggest that subcellular relocalization of RNA modification enzymes may play a role in neuronal plasticity and transmission of information, presumably by addressing new targets.
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Affiliation(s)
- Nicky Jonkhout
- Garvan Institute of Medical Research, Darlinghurst, NSW, Australia.,School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia.,Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona, Spain
| | - Sonia Cruciani
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona, Spain.,University Pompeu Fabra (UPF), Barcelona, Spain
| | - Helaine Graziele Santos Vieira
- Garvan Institute of Medical Research, Darlinghurst, NSW, Australia.,Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona, Spain
| | - Julia Tran
- Garvan Institute of Medical Research, Darlinghurst, NSW, Australia
| | - Huanle Liu
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona, Spain
| | - Ganqiang Liu
- Garvan Institute of Medical Research, Darlinghurst, NSW, Australia.,Current Address: School of Medicine, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Russell Pickford
- Bioanalytical Mass Spectrometry Facility, Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW, Australia
| | | | - Gloria R Franco
- Departamento De Bioquímica E Imunologia, Universidade Federal De Minas Gerais,Belo Horizonte,Minas Gerais, Brazil
| | - Franz Vauti
- Division of Cellular & Molecular Neurobiology, Zoological Institute, Technische Universität Braunschweig, 38106 Braunschweig, Germany
| | - Noelia Camacho
- Institute for Research in Biomedicine, Barcelona, Catalonia, Spain
| | - Seyedeh Sedigheh Abedini
- Department of Genetics, Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Hossein Najmabadi
- Department of Genetics, Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.,Kariminejad-Najmabadi Pathology & Genetics Center, Tehran, Iran
| | - Lluís Ribas de Pouplana
- Institute for Research in Biomedicine, Barcelona, Catalonia, Spain.,Catalan Institution for Research and Advanced Studies, Barcelona, Catalonia, Spain
| | - Daniel Christ
- Garvan Institute of Medical Research, Darlinghurst, NSW, Australia.,School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Nicole Schonrock
- Garvan Institute of Medical Research, Darlinghurst, NSW, Australia
| | - John S Mattick
- Garvan Institute of Medical Research, Darlinghurst, NSW, Australia.,School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Eva Maria Novoa
- Garvan Institute of Medical Research, Darlinghurst, NSW, Australia.,School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, Australia.,Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona, Spain.,University Pompeu Fabra (UPF), Barcelona, Spain
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46
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Memory-specific correlated neuronal activity in higher-order auditory regions of a parrot. Sci Rep 2021; 11:1618. [PMID: 33452344 PMCID: PMC7810846 DOI: 10.1038/s41598-020-80726-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 12/23/2020] [Indexed: 11/08/2022] Open
Abstract
Male budgerigars (Melopsittacus undulatus) are open-ended learners that can learn to produce new vocalisations as adults. We investigated neuronal activation in male budgerigars using the expression of the protein products of the immediate early genes zenk and c-fos in response to exposure to conspecific contact calls (CCs: that of the mate or an unfamiliar female) in three subregions (CMM, dNCM and vNCM) of the caudomedial pallium, a higher order auditory region. Significant positive correlations of Zenk expression were found between these subregions after exposure to mate CCs. In contrast, exposure to CCs of unfamiliar females produced no such correlations. These results suggest the presence of a CC-specific association among the subregions involved in auditory memory. The caudomedial pallium of the male budgerigar may have functional subdivisions that cooperate in the neuronal representation of auditory memory.
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47
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Rosa-Salva O, Mayer U, Versace E, Hébert M, Lemaire BS, Vallortigara G. Sensitive periods for social development: Interactions between predisposed and learned mechanisms. Cognition 2021; 213:104552. [PMID: 33402251 DOI: 10.1016/j.cognition.2020.104552] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 12/08/2020] [Accepted: 12/12/2020] [Indexed: 12/13/2022]
Abstract
We analysed research that makes use of precocial species as animal models to describe the interaction of predisposed mechanisms and environmental factors in early learning, in particular for the development of social cognition. We also highlight the role of sensitive periods in this interaction, focusing on domestic chicks as one of the main animal models for this field. In the first section of the review, we focus on the emergence of early predispositions to attend to social partners. These attentional biases appear before any learning experience about social stimuli. However, non-specific experiences occurring during sensitive periods of the early post-natal life determine the emergence of these predisposed mechanisms for the detection of social partners. Social predispositions have an important role for the development learning-based social cognitive functions, showing the interdependence of predisposed and learned mechanisms in shaping social development. In the second part of the review we concentrate on the reciprocal interactions between filial imprinting and spontaneous (not learned) social predispositions. Reciprocal influences between these two sets of mechanisms ensure that, in the natural environment, filial imprinting will target appropriate social objects. Neural and physiological mechanisms regulating the sensitive periods for the emergence of social predispositions and for filial imprinting learning are also described.
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Affiliation(s)
- Orsola Rosa-Salva
- Center for Mind/Brain Sciences, University of Trento, Piazza Manifattura 1, 38068 Rovereto, TN, Italy
| | - Uwe Mayer
- Center for Mind/Brain Sciences, University of Trento, Piazza Manifattura 1, 38068 Rovereto, TN, Italy
| | - Elisabetta Versace
- Center for Mind/Brain Sciences, University of Trento, Piazza Manifattura 1, 38068 Rovereto, TN, Italy; Department of Biological and Experimental Psychology, School of Biological and Chemical Sciences, Queen Mary University of London, 327 Mile End Road, London E1 4NS, United Kingdom
| | - Marie Hébert
- Center for Mind/Brain Sciences, University of Trento, Piazza Manifattura 1, 38068 Rovereto, TN, Italy
| | - Bastien S Lemaire
- Center for Mind/Brain Sciences, University of Trento, Piazza Manifattura 1, 38068 Rovereto, TN, Italy
| | - Giorgio Vallortigara
- Center for Mind/Brain Sciences, University of Trento, Piazza Manifattura 1, 38068 Rovereto, TN, Italy.
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48
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Du Y, Huo Q, Li T, Sun D, Sun T, Lu Z. Construction of a Mex3c Gene-Deficient Mouse Model to Study C-FOS Expression in Hypothalamic Nuclei and Observe Morphological Differences in Embryonic Neural Tube Development. Med Sci Monit 2020; 26:e927334. [PMID: 33191393 PMCID: PMC7678243 DOI: 10.12659/msm.927334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Background This study utilized CRISPR/Cas9 gene editing technology to construct a Mex3c gene-deficient mouse model, and studied C-FOS expression in hypothalamic nuclei. Material/Methods Thirty Mex3c−/+ mice, 30 mice in the normal group, and 30 Mex3c−/+ mice were randomly divided into control, leptin, and ghrelin groups according to different intraperitoneal injections. HE and Nissl staining were performed to observe the morphology of hypothalamic nerve cells. The C-FOS expression in hypothalamic nuclei of each group was analyzed by immunohistochemical techniques. HE staining was used to observe neural tube morphology, and LFB staining was used to observe nerve myelin sheath morphology. TEM was used to observe neuronal ultrastructure and immunohistochemical techniques were utilized to analyze nestin expression. Results C-FOS expression was lower in the normal control group than in the leptin and ghrelin groups. The Mex3c control group and the leptin group had higher C-FOS expression than the ghrelin group. In neural tube studies, no significant differences were found in the neural tube pathological sections of E14.5-day embryos in each group. Nestin results demonstrated lower expression in the normal group and there was little difference between the HD and Mex3c groups. Conclusions Mex3c appears to participate in the regulation of energy metabolism by inducing C-FOS expression in the hypothalamus. The neural tubes of the offspring of Mex3c−/+ mice had defects during development.
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Affiliation(s)
- Yong Du
- Department of Laboratory Surgery, General Hospital of Ningxia Medical University, Yinchuan, Ningxia, China (mainland).,Department of Pediatric Surgery, General Hospital of Ningxia Medical University, Yinchuan, Ningxia, China (mainland)
| | - Quan Huo
- Department of Pediatric Surgery, College of Clinical Medicine, Ningxia Medical University, Yinchuan, Ningxia, China (mainland)
| | - Ting Li
- Department of Pediatric Surgery, College of Clinical Medicine, Ningxia Medical University, Yinchuan, Ningxia, China (mainland)
| | - Dongjun Sun
- Department of Pediatric Surgery, College of Clinical Medicine, Ningxia Medical University, Yinchuan, Ningxia, China (mainland)
| | - Ting Sun
- Biological Sample Bank, General Hospital of Ningxia Medical University, Yinchuan, Ningxia, China (mainland)
| | - Zhiguo Lu
- Department of Pediatric Surgery, College of Clinical Medicine, Ningxia Medical University, Yinchuan, Ningxia, China (mainland)
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49
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Huang X, Chen Q, Luo W, Pakvasa M, Zhang Y, Zheng L, Li S, Yang Z, Zeng H, Liang F, Zhang F, Hu DA, Qin KH, Wang EJ, Qin DS, Reid RR, He TC, Athiviraham A, El Dafrawy M, Zhang H. SATB2: A versatile transcriptional regulator of craniofacial and skeleton development, neurogenesis and tumorigenesis, and its applications in regenerative medicine. Genes Dis 2020; 9:95-107. [PMID: 35005110 PMCID: PMC8720659 DOI: 10.1016/j.gendis.2020.10.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/30/2020] [Accepted: 10/06/2020] [Indexed: 02/07/2023] Open
Abstract
SATB2 (special AT-rich sequence-binding protein 2) is a member of the special AT-rich binding protein family. As a transcription regulator, SATB2 mainly integrates higher-order chromatin organization. SATB2 expression appears to be tissue- and stage-specific, and is governed by several cellular signaling molecules and mediators. Expressed in branchial arches and osteoblast-lineage cells, SATB2 plays a significant role in craniofacial pattern and skeleton development. In addition to regulating osteogenic differentiation, SATB2 also displays versatile functions in neural development and cancer progression. As an osteoinductive factor, SATB2 holds great promise in improving bone regeneration toward bone defect repair. In this review, we have summarized our current understanding of the physiological and pathological functions of SATB2 in craniofacial and skeleton development, neurogenesis, tumorigenesis and regenerative medicine.
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Affiliation(s)
- Xia Huang
- Stomatological Hospital of Chongqing Medical University, Chongqing 401147, PR China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, PR China
| | - Qiuman Chen
- Stomatological Hospital of Chongqing Medical University, Chongqing 401147, PR China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, PR China
| | - Wenping Luo
- Stomatological Hospital of Chongqing Medical University, Chongqing 401147, PR China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, PR China.,Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Mikhail Pakvasa
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,The Pritzker School of Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Department of Surgery, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Yuxin Zhang
- Stomatological Hospital of Chongqing Medical University, Chongqing 401147, PR China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, PR China
| | - Liwen Zheng
- Stomatological Hospital of Chongqing Medical University, Chongqing 401147, PR China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, PR China
| | - Shuang Li
- Stomatological Hospital of Chongqing Medical University, Chongqing 401147, PR China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, PR China
| | - Zhuohui Yang
- Stomatological Hospital of Chongqing Medical University, Chongqing 401147, PR China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, PR China
| | - Huan Zeng
- Stomatological Hospital of Chongqing Medical University, Chongqing 401147, PR China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, PR China
| | - Fang Liang
- Stomatological Hospital of Chongqing Medical University, Chongqing 401147, PR China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, PR China
| | - Fugui Zhang
- Stomatological Hospital of Chongqing Medical University, Chongqing 401147, PR China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, PR China.,Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Daniel A Hu
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Kevin H Qin
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Eric J Wang
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - David S Qin
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Russell R Reid
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Department of Surgery, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Tong-Chuan He
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Department of Surgery, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Aravind Athiviraham
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Mostafa El Dafrawy
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Hongmei Zhang
- Stomatological Hospital of Chongqing Medical University, Chongqing 401147, PR China.,Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing 401147, PR China
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50
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Hogan MK, Hamilton GF, Horner PJ. Neural Stimulation and Molecular Mechanisms of Plasticity and Regeneration: A Review. Front Cell Neurosci 2020; 14:271. [PMID: 33173465 PMCID: PMC7591397 DOI: 10.3389/fncel.2020.00271] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 07/31/2020] [Indexed: 12/23/2022] Open
Abstract
Neural stimulation modulates the depolarization of neurons, thereby triggering activity-associated mechanisms of neuronal plasticity. Activity-associated mechanisms in turn play a major role in post-mitotic structure and function of adult neurons. Our understanding of the interactions between neuronal behavior, patterns of neural activity, and the surrounding environment is evolving at a rapid pace. Brain derived neurotrophic factor is a critical mediator of activity-associated plasticity, while multiple immediate early genes mediate plasticity of neurons following bouts of neural activity. New research has uncovered genetic mechanisms that govern the expression of DNA following changes in neural activity patterns, including RNAPII pause-release and activity-associated double stranded breaks. Discovery of novel mechanisms governing activity-associated plasticity of neurons hints at a layered and complex molecular control of neuronal response to depolarization. Importantly, patterns of depolarization in neurons are shown to be important mediators of genetic expression patterns and molecular responses. More research is needed to fully uncover the molecular response of different types of neurons-to-activity patterns; however, known responses might be leveraged to facilitate recovery after neural damage. Physical rehabilitation through passive or active exercise modulates neurotrophic factor expression in the brain and spinal cord and can initiate cortical plasticity commensurate with functional recovery. Rehabilitation likely relies on activity-associated mechanisms; however, it may be limited in its application. Electrical and magnetic stimulation direct specific activity patterns not accessible through passive or active exercise and work synergistically to improve standing, walking, and forelimb use after injury. Here, we review emerging concepts in the molecular mechanisms of activity-derived plasticity in order to highlight opportunities that could add value to therapeutic protocols for promoting recovery of function after trauma, disease, or age-related functional decline.
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Affiliation(s)
- Matthew K Hogan
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, United States
| | - Gillian F Hamilton
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, United States
| | - Philip J Horner
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, United States
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