A 15q11–q13 Duplication Mouse Model of Autism Spectrum Disorders / Toru TAKUMI

Public ISBD in The Neuroscience of Autism Spectrum Disorders / Joseph D. BUXBAUM Titre : A 15q11–q13 Duplication Mouse Model of Autism Spectrum Disorders Type de document : texte imprimé Auteurs : Toru TAKUMI, Auteur ; Keita FUKUMOTO, Auteur ; Jun NOMURA, Auteur Année de publication : 2013 Importance : p.401-408 Langues : Anglais (eng) Index. décimale : SCI-D SCI-D - Neurosciences Résumé : Autism spectrum disorders (ASD) are developmental brain disorders manifested by abnormal social behavior. Recent human genetic studies have revealed various copy number variations in ASD. Duplication of human chromosome 15q11–q13 is known to be most frequently associated with cytogenetic abnormality in ASD. Human chromosome 15q11–q13, also known to include imprinted genes, is well conserved to mouse chromosome 7. By a chromosome-engineering technique, we developed a mouse model for 15q11–q13 duplication. Paternally derived duplication (patDp/+) mice show abnormal behavior including abnormal social interaction, alteration in the developmental course of ultrasonic vocalizations, and resistance to change in reversal learning. Reduced serotonin (5-HT) is observed in the brain of patDp/+ mice during development, suggesting that this abnormal 5-HT level may affect social behavior. A 15q11–q13 duplication model mouse will facilitate future studies in genetics of developmental brain disorders and serve as an invaluable tool for therapeutic development. Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=189 in The Neuroscience of Autism Spectrum Disorders / Joseph D. BUXBAUM A 15q11–q13 Duplication Mouse Model of Autism Spectrum Disorders [texte imprimé] / Toru TAKUMI, Auteur ; Keita FUKUMOTO, Auteur ; Jun NOMURA, Auteur . - 2013 . - p.401-408. Langues : Anglais (eng) Index. décimale : SCI-D SCI-D - Neurosciences Résumé : Autism spectrum disorders (ASD) are developmental brain disorders manifested by abnormal social behavior. Recent human genetic studies have revealed various copy number variations in ASD. Duplication of human chromosome 15q11–q13 is known to be most frequently associated with cytogenetic abnormality in ASD. Human chromosome 15q11–q13, also known to include imprinted genes, is well conserved to mouse chromosome 7. By a chromosome-engineering technique, we developed a mouse model for 15q11–q13 duplication. Paternally derived duplication (patDp/+) mice show abnormal behavior including abnormal social interaction, alteration in the developmental course of ultrasonic vocalizations, and resistance to change in reversal learning. Reduced serotonin (5-HT) is observed in the brain of patDp/+ mice during development, suggesting that this abnormal 5-HT level may affect social behavior. A 15q11–q13 duplication model mouse will facilitate future studies in genetics of developmental brain disorders and serve as an invaluable tool for therapeutic development. Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=189

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Germ-cell-specific transcriptome analysis illuminates the chromatin and ubiquitin pathway in autism spectrum disorders / Sawako FURUKAWA in Autism Research, 16-6 (June 2023)  

Public ISBD [article]  inAutism Research > 16-6 (June 2023) . - p.1101-1110 Titre : Germ-cell-specific transcriptome analysis illuminates the chromatin and ubiquitin pathway in autism spectrum disorders Type de document : texte imprimé Auteurs : Sawako FURUKAWA, Auteur ; Jun NOMURA, Auteur ; Hiroaki HANAFUSA, Auteur ; Hiroko MAEGAWA, Auteur ; Toru TAKUMI, Auteur Article en page(s) : p.1101-1110 Langues : Anglais (eng) Mots-clés : autism spectrum disorder  bioinformatics  copy number variants  embryonic stem cells  germ cells  single-cell analysis Index. décimale : PER Périodiques Résumé : Abstract Accumulating epidemiological studies have suggested a positive association between advanced paternal age at conception and the increased risk of neurodevelopmental outcomes such as autism spectrum disorder (ASD) in their children. Recent biological studies using human sperm have identified increased de novo mutations in aged fathers, and hyper- or hypomethylation has been identified in the sperm from aged rodents. Dysregulation of DNA methylation in sperm may explain the transgenerational effects on the pathogenesis of ASD. However, compared to these epigenetic changes in the sperm of aged males, the effects of inherited predisposition from germ cells are largely unknown. Here, we use single-cell transcriptome data sets from 13 cell lines, including 12 ASD-associated CNVs models and control, that are performed neural differentiation from mouse embryonic stem cells. This study performed comprehensive bioinformatic analyses such as gene ontology (GO), network, pathway, and upstream regulator analyses. Through these analyses, we identify several susceptible pathways, such as chromatin and ubiquitin, in addition to translational and oxidative phosphorylation. Our results suggest that dysregulation of epigenetic chromosome remodeling and ubiquitin-proteasome pathway in the germ cell is a possible modulator for subsequent differentiated cells, sperm, and egg, as a risk factor for the neurodevelopmental disorder. En ligne : https://doi.org/10.1002/aur.2939 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=507 [article] Germ-cell-specific transcriptome analysis illuminates the chromatin and ubiquitin pathway in autism spectrum disorders [texte imprimé] / Sawako FURUKAWA, Auteur ; Jun NOMURA, Auteur ; Hiroaki HANAFUSA, Auteur ; Hiroko MAEGAWA, Auteur ; Toru TAKUMI, Auteur . - p.1101-1110. Langues : Anglais (eng) in Autism Research > 16-6 (June 2023) . - p.1101-1110 Mots-clés : autism spectrum disorder  bioinformatics  copy number variants  embryonic stem cells  germ cells  single-cell analysis Index. décimale : PER Périodiques Résumé : Abstract Accumulating epidemiological studies have suggested a positive association between advanced paternal age at conception and the increased risk of neurodevelopmental outcomes such as autism spectrum disorder (ASD) in their children. Recent biological studies using human sperm have identified increased de novo mutations in aged fathers, and hyper- or hypomethylation has been identified in the sperm from aged rodents. Dysregulation of DNA methylation in sperm may explain the transgenerational effects on the pathogenesis of ASD. However, compared to these epigenetic changes in the sperm of aged males, the effects of inherited predisposition from germ cells are largely unknown. Here, we use single-cell transcriptome data sets from 13 cell lines, including 12 ASD-associated CNVs models and control, that are performed neural differentiation from mouse embryonic stem cells. This study performed comprehensive bioinformatic analyses such as gene ontology (GO), network, pathway, and upstream regulator analyses. Through these analyses, we identify several susceptible pathways, such as chromatin and ubiquitin, in addition to translational and oxidative phosphorylation. Our results suggest that dysregulation of epigenetic chromosome remodeling and ubiquitin-proteasome pathway in the germ cell is a possible modulator for subsequent differentiated cells, sperm, and egg, as a risk factor for the neurodevelopmental disorder. En ligne : https://doi.org/10.1002/aur.2939 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=507

Neuroanatomical Phenotypes Are Consistent With Autism-Like Behavioral Phenotypes in the 15q11-13 Duplication Mouse Model / Jacob ELLEGOOD in Autism Research, 8-5 (October 2015)  

Public ISBD [article]  inAutism Research > 8-5 (October 2015) . - p.545-555 Titre : Neuroanatomical Phenotypes Are Consistent With Autism-Like Behavioral Phenotypes in the 15q11-13 Duplication Mouse Model Type de document : texte imprimé Auteurs : Jacob ELLEGOOD, Auteur ; Nobuhiro NAKAI, Auteur ; Jin NAKATANI, Auteur ; R. Mark HENKELMAN, Auteur ; Toru TAKUMI, Auteur ; Jason P. LERCH, Auteur Article en page(s) : p.545-555 Langues : Anglais (eng) Mots-clés : animal models  structural MRI  neuroanatomy  copy number variation  molecular genetics  15q11-13 duplication Index. décimale : PER Périodiques Résumé : Paternally and maternally inherited deletions and duplications of human chromosome 15q11-13 are relatively common in the human population. Furthermore, duplications in the 15q region are often associated with autism. Both maternal and paternal interstitial 15q11-13 duplication mouse models have been previously created, where several behavioral differences were found in the paternal duplication (patDp/+) mouse but not in the maternal duplication (matDp/+). These included decreased sociability, behavioral inflexibility, abnormal ultrasonic vocalizations, decreased spontaneous activity, and increased anxiety. Similarly, in the current study, we found several anatomical differences in the patDp/+ mice that were not seen in the matDp/+ mice. Regional differences that are evident only in the paternal duplication are a smaller dentate gyrus and smaller medial striatum. These differences may be responsible for the behavioral inflexibility. Furthermore, a smaller dorsal raphe nucleus could be responsible for the reported serotonin defects. This study highlights consistency that can be found between behavioral and anatomical phenotyping. Autism Res 2015, 8: 545–555. © 2015 International Society for Autism Research, Wiley Periodicals, Inc. En ligne : http://dx.doi.org/10.1002/aur.1469 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=270 [article] Neuroanatomical Phenotypes Are Consistent With Autism-Like Behavioral Phenotypes in the 15q11-13 Duplication Mouse Model [texte imprimé] / Jacob ELLEGOOD, Auteur ; Nobuhiro NAKAI, Auteur ; Jin NAKATANI, Auteur ; R. Mark HENKELMAN, Auteur ; Toru TAKUMI, Auteur ; Jason P. LERCH, Auteur . - p.545-555. Langues : Anglais (eng) in Autism Research > 8-5 (October 2015) . - p.545-555 Mots-clés : animal models  structural MRI  neuroanatomy  copy number variation  molecular genetics  15q11-13 duplication Index. décimale : PER Périodiques Résumé : Paternally and maternally inherited deletions and duplications of human chromosome 15q11-13 are relatively common in the human population. Furthermore, duplications in the 15q region are often associated with autism. Both maternal and paternal interstitial 15q11-13 duplication mouse models have been previously created, where several behavioral differences were found in the paternal duplication (patDp/+) mouse but not in the maternal duplication (matDp/+). These included decreased sociability, behavioral inflexibility, abnormal ultrasonic vocalizations, decreased spontaneous activity, and increased anxiety. Similarly, in the current study, we found several anatomical differences in the patDp/+ mice that were not seen in the matDp/+ mice. Regional differences that are evident only in the paternal duplication are a smaller dentate gyrus and smaller medial striatum. These differences may be responsible for the behavioral inflexibility. Furthermore, a smaller dorsal raphe nucleus could be responsible for the reported serotonin defects. This study highlights consistency that can be found between behavioral and anatomical phenotyping. Autism Res 2015, 8: 545–555. © 2015 International Society for Autism Research, Wiley Periodicals, Inc. En ligne : http://dx.doi.org/10.1002/aur.1469 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=270

Serotonin Disturbance in Mouse Models of Autism Spectrum Disorders / Kota TAMADA

Public ISBD in Organism models of autism spectrum disorders / Pierre L. ROUBERTOUX Titre : Serotonin Disturbance in Mouse Models of Autism Spectrum Disorders Type de document : texte imprimé Auteurs : Kota TAMADA, Auteur ; Toru TAKUMI, Auteur Année de publication : 2015 Importance : p.239-262 Langues : Anglais (eng) Mots-clés : 15q11–13 duplication  5-Hydroxytryptamine  Hyperserotonemia  VNTR  Tryptophan depletion  BALB/c mice  BTBR mice  Social interactions  Ultrasonic vocalizations  Inflexible behavior  Repetitive behavior  Self-grooming  Reversal learning  Thigmotaxis Index. décimale : AUT-B AUT-B - L'Autisme - Ouvrages généraux et scientifiques Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=265 in Organism models of autism spectrum disorders / Pierre L. ROUBERTOUX Serotonin Disturbance in Mouse Models of Autism Spectrum Disorders [texte imprimé] / Kota TAMADA, Auteur ; Toru TAKUMI, Auteur . - 2015 . - p.239-262. Langues : Anglais (eng) Mots-clés : 15q11–13 duplication  5-Hydroxytryptamine  Hyperserotonemia  VNTR  Tryptophan depletion  BALB/c mice  BTBR mice  Social interactions  Ultrasonic vocalizations  Inflexible behavior  Repetitive behavior  Self-grooming  Reversal learning  Thigmotaxis Index. décimale : AUT-B AUT-B - L'Autisme - Ouvrages généraux et scientifiques Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=265

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Sleep EEG signatures in mouse models of 15q11.2-13.1 duplication (Dup15q) syndrome / Vidya SARAVANAPANDIAN in Journal of Neurodevelopmental Disorders, 16 (2024)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 16 (2024) Titre : Sleep EEG signatures in mouse models of 15q11.2-13.1 duplication (Dup15q) syndrome Type de document : texte imprimé Auteurs : Vidya SARAVANAPANDIAN, Auteur ; Melika MADANI, Auteur ; India NICHOLS, Auteur ; Scott VINCENT, Auteur ; Mary DOVER, Auteur ; Dante DIKEMAN, Auteur ; Benjamin D. PHILPOT, Auteur ; Toru TAKUMI, Auteur ; Christopher S. COLWELL, Auteur ; Shafali JESTE, Auteur ; Ketema N. PAUL, Auteur ; Peyman GOLSHANI, Auteur Langues : Anglais (eng) Mots-clés : Animals  Mice  Chromosomes, Human, Pair 15/genetics  Electroencephalography  Disease Models, Animal  Male  Female  Sleep Wake Disorders/genetics/physiopathology  Sleep/physiology/genetics  Trisomy/physiopathology/genetics  Chromosome Aberrations  Intellectual Disability  Autism  Biomarkers  Dup15q syndrome  Eeg  Gaba  Neurodevelopmental disorders  Sleep  Ube3a Index. décimale : PER Périodiques Résumé : BACKGROUND: Sleep disturbances are a prevalent and complex comorbidity in neurodevelopmental disorders (NDDs). Dup15q syndrome (duplications of 15q11.2-13.1) is a genetic disorder highly penetrant for NDDs such as autism and intellectual disability and it is frequently accompanied by significant disruptions in sleep patterns. The 15q critical region harbors genes crucial for brain development, notably UBE3A and a cluster of gamma-aminobutyric acid type A receptor (GABA(A)R) genes. We previously described an electrophysiological biomarker of the syndrome, marked by heightened beta oscillations (12-30 Hz) in individuals with Dup15q syndrome, akin to electroencephalogram (EEG) alterations induced by allosteric modulation of GABA(A)Rs. Those with Dup15q syndrome exhibited increased beta oscillations during the awake resting state and during sleep, and they showed profoundly abnormal NREM sleep. This study aims to assess the translational validity of these EEG signatures and to delve into their neurobiological underpinnings by quantifying sleep physiology in chromosome-engineered mice with maternal (matDp/ + mice) or paternal (patDp/ + mice) inheritance of the full 15q11.2-13.1-equivalent duplication, and mice with duplication of just the UBE3A gene (Ube3a overexpression mice; Ube3a OE mice) and comparing the sleep metrics with their respective wildtype (WT) littermate controls. METHODS: We collected 48-h EEG/EMG recordings from 35 (23 male, 12 female) 12-24-week-old matDp/ + , patDp/ + , Ube3a OE mice, and their WT littermate controls. We quantified baseline sleep, sleep fragmentation, spectral power dynamics during sleep states, and recovery following sleep deprivation. Within each group, distinctions between Dup15q mutant mice and WT littermate controls were evaluated using analysis of variance (ANOVA) and student's t-test. The impact of genotype and time was discerned through repeated measures ANOVA, and significance was established at p < 0.05. RESULTS: Our study revealed that across brain states, matDp/ + mice mirrored the elevated beta oscillation phenotype observed in clinical EEGs from individuals with Dup15q syndrome. Time to sleep onset after light onset was significantly reduced in matDp/ + and Ube3a OE mice. However, NREM sleep between Dup15q mutant and WT littermate mice remained unaltered, suggesting a divergence from the clinical presentation in humans. Additionally, while increased beta oscillations persisted in matDp/ + mice after 6-h of sleep deprivation, recovery NREM sleep remained unaltered in all groups, thus suggesting that these mice exhibit resilience in the fundamental processes governing sleep-wake regulation. CONCLUSIONS: Quantification of mechanistic and translatable EEG biomarkers is essential for advancing our understanding of NDDs and their underlying pathophysiology. Our study of sleep physiology in the Dup15q mice underscores that the beta EEG biomarker has strong translational validity, thus opening the door for pre-clinical studies of putative drug targets, using the biomarker as a translational measure of drug-target engagement. The unaltered NREM sleep may be due to inherent differences in neurobiology between mice and humans. These nuanced distinctions highlight the complexity of sleep disruptions in Dup15q syndrome and emphasize the need for a comprehensive understanding that encompasses both shared and distinct features between murine models and clinical populations. En ligne : https://dx.doi.org/10.1186/s11689-024-09556-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=575 [article] Sleep EEG signatures in mouse models of 15q11.2-13.1 duplication (Dup15q) syndrome [texte imprimé] / Vidya SARAVANAPANDIAN, Auteur ; Melika MADANI, Auteur ; India NICHOLS, Auteur ; Scott VINCENT, Auteur ; Mary DOVER, Auteur ; Dante DIKEMAN, Auteur ; Benjamin D. PHILPOT, Auteur ; Toru TAKUMI, Auteur ; Christopher S. COLWELL, Auteur ; Shafali JESTE, Auteur ; Ketema N. PAUL, Auteur ; Peyman GOLSHANI, Auteur. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 16 (2024) Mots-clés : Animals  Mice  Chromosomes, Human, Pair 15/genetics  Electroencephalography  Disease Models, Animal  Male  Female  Sleep Wake Disorders/genetics/physiopathology  Sleep/physiology/genetics  Trisomy/physiopathology/genetics  Chromosome Aberrations  Intellectual Disability  Autism  Biomarkers  Dup15q syndrome  Eeg  Gaba  Neurodevelopmental disorders  Sleep  Ube3a Index. décimale : PER Périodiques Résumé : BACKGROUND: Sleep disturbances are a prevalent and complex comorbidity in neurodevelopmental disorders (NDDs). Dup15q syndrome (duplications of 15q11.2-13.1) is a genetic disorder highly penetrant for NDDs such as autism and intellectual disability and it is frequently accompanied by significant disruptions in sleep patterns. The 15q critical region harbors genes crucial for brain development, notably UBE3A and a cluster of gamma-aminobutyric acid type A receptor (GABA(A)R) genes. We previously described an electrophysiological biomarker of the syndrome, marked by heightened beta oscillations (12-30 Hz) in individuals with Dup15q syndrome, akin to electroencephalogram (EEG) alterations induced by allosteric modulation of GABA(A)Rs. Those with Dup15q syndrome exhibited increased beta oscillations during the awake resting state and during sleep, and they showed profoundly abnormal NREM sleep. This study aims to assess the translational validity of these EEG signatures and to delve into their neurobiological underpinnings by quantifying sleep physiology in chromosome-engineered mice with maternal (matDp/ + mice) or paternal (patDp/ + mice) inheritance of the full 15q11.2-13.1-equivalent duplication, and mice with duplication of just the UBE3A gene (Ube3a overexpression mice; Ube3a OE mice) and comparing the sleep metrics with their respective wildtype (WT) littermate controls. METHODS: We collected 48-h EEG/EMG recordings from 35 (23 male, 12 female) 12-24-week-old matDp/ + , patDp/ + , Ube3a OE mice, and their WT littermate controls. We quantified baseline sleep, sleep fragmentation, spectral power dynamics during sleep states, and recovery following sleep deprivation. Within each group, distinctions between Dup15q mutant mice and WT littermate controls were evaluated using analysis of variance (ANOVA) and student's t-test. The impact of genotype and time was discerned through repeated measures ANOVA, and significance was established at p < 0.05. RESULTS: Our study revealed that across brain states, matDp/ + mice mirrored the elevated beta oscillation phenotype observed in clinical EEGs from individuals with Dup15q syndrome. Time to sleep onset after light onset was significantly reduced in matDp/ + and Ube3a OE mice. However, NREM sleep between Dup15q mutant and WT littermate mice remained unaltered, suggesting a divergence from the clinical presentation in humans. Additionally, while increased beta oscillations persisted in matDp/ + mice after 6-h of sleep deprivation, recovery NREM sleep remained unaltered in all groups, thus suggesting that these mice exhibit resilience in the fundamental processes governing sleep-wake regulation. CONCLUSIONS: Quantification of mechanistic and translatable EEG biomarkers is essential for advancing our understanding of NDDs and their underlying pathophysiology. Our study of sleep physiology in the Dup15q mice underscores that the beta EEG biomarker has strong translational validity, thus opening the door for pre-clinical studies of putative drug targets, using the biomarker as a translational measure of drug-target engagement. The unaltered NREM sleep may be due to inherent differences in neurobiology between mice and humans. These nuanced distinctions highlight the complexity of sleep disruptions in Dup15q syndrome and emphasize the need for a comprehensive understanding that encompasses both shared and distinct features between murine models and clinical populations. En ligne : https://dx.doi.org/10.1186/s11689-024-09556-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=575

The neurobiology of mouse models syntenic to human chromosome 15q / Toru TAKUMI in Journal of Neurodevelopmental Disorders, 3-3 (September 2011)  

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