
- <Centre d'Information et de documentation du CRA Rhône-Alpes
- CRA
- Informations pratiques
-
Adresse
Centre d'information et de documentation
Horaires
du CRA Rhône-Alpes
Centre Hospitalier le Vinatier
bât 211
95, Bd Pinel
69678 Bron CedexLundi au Vendredi
Contact
9h00-12h00 13h30-16h00Tél: +33(0)4 37 91 54 65
Mail
Fax: +33(0)4 37 91 54 37
-
Adresse
Auteur Matthew O'SULLIVAN
|
|
Documents disponibles écrits par cet auteur (3)
Faire une suggestion Affiner la rechercheEvidence of neurocognitive and resting state functional connectivity differences in carriers of NRXN1 deletions / Jacqueline FITZGERALD in Journal of Neurodevelopmental Disorders, 17 (2025)
![]()
[article]
Titre : Evidence of neurocognitive and resting state functional connectivity differences in carriers of NRXN1 deletions Type de document : texte imprimé Auteurs : Jacqueline FITZGERALD, Auteur ; Ciara J. MOLLOY, Auteur ; Thomas DINNEEN, Auteur ; Niamh E. FEERICK, Auteur ; Matthew O'SULLIVAN, Auteur ; Richard O'CONAILL, Auteur ; Maryam AL-SHEHHI, Auteur ; Richard REILLY, Auteur ; Sally Ann LYNCH, Auteur ; Eleisa A. HERON, Auteur ; Clare KELLY, Auteur ; Sanbing SHEN, Auteur ; Louise GALLAGHER, Auteur Langues : Anglais (eng) Mots-clés : Humans Female Male Magnetic Resonance Imaging Adult Young Adult Calcium-Binding Proteins/genetics Diffusion Tensor Imaging Brain/diagnostic imaging/physiopathology Neural Cell Adhesion Molecules/genetics Adolescent Cell Adhesion Molecules, Neuronal/genetics Cognition/physiology Neuropsychological Tests Gene Deletion Neural Pathways/diagnostic imaging/physiopathology Executive Function/physiology Cognition Copy number variant NRXN1 deletion Neuroimaging the study was obtained from St. James’s Hospital/Tallaght University Hospital Research Ethics Committee (REC reference: 2015/03/01). Participants over 18 years provided written consent and parental written consent was provided for those under 18 years. Consent for publication: All authors who contributed to the article have approved the submitted version. Competing interests: The authors declare no competing interests. Index. décimale : PER Périodiques Résumé : BACKGROUND: NRXN1 deletion (NRXN1 del) is a rare copy number variant associated with several neurodevelopmental, neuropsychiatric, and cognitive outcomes. The NRXN1 gene encodes for a pre-synaptic cell adhesion molecule that is important for synapse formation, regulation and neurotransmission. We used a gene-first approach to investigate neurocognitive and brain phenotypes in NRXN1 del carriers. METHODS: Forty-two participants (21 NRXN1 del carriers and 21 neurotypical age and sex-matched comparisons) completed IQ assessments, and a neurocognitive battery, including, executive function, attention, and social cognition tasks. Magnetic resonance imaging (MRI) data, including T1-weighted anatomical scans, resting state functional MRI and diffusion tensor imaging, were acquired in 36 participants (17 NRXN1 del carriers and 19 comparisons). RESULTS: NRXN1 del carriers had lower mean IQ and poorer spatial working memory performance compared to comparisons (p ≤ 0.05). Neuroimaging results revealed group differences in visual and ventral attention resting state networks (p < 0.05). Network-based statistical analysis showed a significant effect of group status for 28/115 connections, with poorer segregation between visual and default networks in NRXN1 del carriers relative to comparisons. No differences in brain structural volume or cortical thickness, or diffusion measures of white matter structural architecture were observed between groups. CONCLUSIONS: This exploratory study provides evidence for neurocognitive impacts and brain functional differences related to underlying synaptic mechanisms. Brain functional differences in NRXN1 del carriers may support altered excitation/inhibition dynamics within the brain. Gene-first approaches may establish brain-based translational markers to identify neurobiologically informed subgroups within neurodevelopmental and neuropsychiatric conditions, and ultimately transdiagnostic therapeutic strategies. En ligne : https://dx.doi.org/10.1186/s11689-025-09625-5 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=576
in Journal of Neurodevelopmental Disorders > 17 (2025)[article] Evidence of neurocognitive and resting state functional connectivity differences in carriers of NRXN1 deletions [texte imprimé] / Jacqueline FITZGERALD, Auteur ; Ciara J. MOLLOY, Auteur ; Thomas DINNEEN, Auteur ; Niamh E. FEERICK, Auteur ; Matthew O'SULLIVAN, Auteur ; Richard O'CONAILL, Auteur ; Maryam AL-SHEHHI, Auteur ; Richard REILLY, Auteur ; Sally Ann LYNCH, Auteur ; Eleisa A. HERON, Auteur ; Clare KELLY, Auteur ; Sanbing SHEN, Auteur ; Louise GALLAGHER, Auteur.
Langues : Anglais (eng)
in Journal of Neurodevelopmental Disorders > 17 (2025)
Mots-clés : Humans Female Male Magnetic Resonance Imaging Adult Young Adult Calcium-Binding Proteins/genetics Diffusion Tensor Imaging Brain/diagnostic imaging/physiopathology Neural Cell Adhesion Molecules/genetics Adolescent Cell Adhesion Molecules, Neuronal/genetics Cognition/physiology Neuropsychological Tests Gene Deletion Neural Pathways/diagnostic imaging/physiopathology Executive Function/physiology Cognition Copy number variant NRXN1 deletion Neuroimaging the study was obtained from St. James’s Hospital/Tallaght University Hospital Research Ethics Committee (REC reference: 2015/03/01). Participants over 18 years provided written consent and parental written consent was provided for those under 18 years. Consent for publication: All authors who contributed to the article have approved the submitted version. Competing interests: The authors declare no competing interests. Index. décimale : PER Périodiques Résumé : BACKGROUND: NRXN1 deletion (NRXN1 del) is a rare copy number variant associated with several neurodevelopmental, neuropsychiatric, and cognitive outcomes. The NRXN1 gene encodes for a pre-synaptic cell adhesion molecule that is important for synapse formation, regulation and neurotransmission. We used a gene-first approach to investigate neurocognitive and brain phenotypes in NRXN1 del carriers. METHODS: Forty-two participants (21 NRXN1 del carriers and 21 neurotypical age and sex-matched comparisons) completed IQ assessments, and a neurocognitive battery, including, executive function, attention, and social cognition tasks. Magnetic resonance imaging (MRI) data, including T1-weighted anatomical scans, resting state functional MRI and diffusion tensor imaging, were acquired in 36 participants (17 NRXN1 del carriers and 19 comparisons). RESULTS: NRXN1 del carriers had lower mean IQ and poorer spatial working memory performance compared to comparisons (p ≤ 0.05). Neuroimaging results revealed group differences in visual and ventral attention resting state networks (p < 0.05). Network-based statistical analysis showed a significant effect of group status for 28/115 connections, with poorer segregation between visual and default networks in NRXN1 del carriers relative to comparisons. No differences in brain structural volume or cortical thickness, or diffusion measures of white matter structural architecture were observed between groups. CONCLUSIONS: This exploratory study provides evidence for neurocognitive impacts and brain functional differences related to underlying synaptic mechanisms. Brain functional differences in NRXN1 del carriers may support altered excitation/inhibition dynamics within the brain. Gene-first approaches may establish brain-based translational markers to identify neurobiologically informed subgroups within neurodevelopmental and neuropsychiatric conditions, and ultimately transdiagnostic therapeutic strategies. En ligne : https://dx.doi.org/10.1186/s11689-025-09625-5 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=576 Increased Ca(2+) signaling in NRXN1alpha (+/-) neurons derived from ASD induced pluripotent stem cells / Sahar AVAZZADEH in Molecular Autism, 10 (2019)
![]()
[article]
Titre : Increased Ca(2+) signaling in NRXN1alpha (+/-) neurons derived from ASD induced pluripotent stem cells Type de document : texte imprimé Auteurs : Sahar AVAZZADEH, Auteur ; Katya MCDONAGH, Auteur ; Jamie REILLY, Auteur ; Yao WANG, Auteur ; Stephanie D. BOOMKAMP, Auteur ; Veronica MCINERNEY, Auteur ; Janusz KRAWCZYK, Auteur ; Jacqueline FITZGERALD, Auteur ; Niamh FEERICK, Auteur ; Matthew O'SULLIVAN, Auteur ; Amirhossein JALALI, Auteur ; Eva B. FORMAN, Auteur ; Sally A. LYNCH, Auteur ; Sean ENNIS, Auteur ; Nele COSEMANS, Auteur ; Hilde PEETERS, Auteur ; Peter DOCKERY, Auteur ; Timothy O'BRIEN, Auteur ; Leo R. QUINLAN, Auteur ; Louise GALLAGHER, Auteur ; Sanbing SHEN, Auteur Article en page(s) : 52 p. Langues : Anglais (eng) Mots-clés : Autism Calcium signaling Induced pluripotent stem cells NRXN1alpha Neurons Transcriptome Index. décimale : PER Périodiques Résumé : Background: Autism spectrum disorder (ASD) is a neurodevelopmental disorder with a high co-morbidity of epilepsy and associated with hundreds of rare risk factors. NRXN1 deletion is among the commonest rare genetic factors shared by ASD, schizophrenia, intellectual disability, epilepsy, and developmental delay. However, how NRXN1 deletions lead to different clinical symptoms is unknown. Patient-derived cells are essential to investigate the functional consequences of NRXN1 lesions to human neurons in different diseases. Methods: Skin biopsies were donated by five healthy donors and three ASD patients carrying NRXN1alpha (+/-) deletions. Seven control and six NRXN1alpha (+/-) iPSC lines were derived and differentiated into day 100 cortical excitatory neurons using dual SMAD inhibition. Calcium (Ca(2+)) imaging was performed using Fluo4-AM, and the properties of Ca(2+) transients were compared between two groups of neurons. Transcriptome analysis was carried out to undercover molecular pathways associated with NRXN1alpha (+/-) neurons. Results: NRXN1alpha (+/-) neurons were found to display altered calcium dynamics, with significantly increased frequency, duration, and amplitude of Ca(2+) transients. Whole genome RNA sequencing also revealed altered ion transport and transporter activity, with upregulated voltage-gated calcium channels as one of the most significant pathways in NRXN1alpha (+/-) neurons identified by STRING and GSEA analyses. Conclusions: This is the first report to show that human NRXN1alpha (+/-) neurons derived from ASD patients' iPSCs present novel phenotypes of upregulated VGCCs and increased Ca(2+) transients, which may facilitate the development of drug screening assays for the treatment of ASD. En ligne : http://dx.doi.org/10.1186/s13229-019-0303-3 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=414
in Molecular Autism > 10 (2019) . - 52 p.[article] Increased Ca(2+) signaling in NRXN1alpha (+/-) neurons derived from ASD induced pluripotent stem cells [texte imprimé] / Sahar AVAZZADEH, Auteur ; Katya MCDONAGH, Auteur ; Jamie REILLY, Auteur ; Yao WANG, Auteur ; Stephanie D. BOOMKAMP, Auteur ; Veronica MCINERNEY, Auteur ; Janusz KRAWCZYK, Auteur ; Jacqueline FITZGERALD, Auteur ; Niamh FEERICK, Auteur ; Matthew O'SULLIVAN, Auteur ; Amirhossein JALALI, Auteur ; Eva B. FORMAN, Auteur ; Sally A. LYNCH, Auteur ; Sean ENNIS, Auteur ; Nele COSEMANS, Auteur ; Hilde PEETERS, Auteur ; Peter DOCKERY, Auteur ; Timothy O'BRIEN, Auteur ; Leo R. QUINLAN, Auteur ; Louise GALLAGHER, Auteur ; Sanbing SHEN, Auteur . - 52 p.
Langues : Anglais (eng)
in Molecular Autism > 10 (2019) . - 52 p.
Mots-clés : Autism Calcium signaling Induced pluripotent stem cells NRXN1alpha Neurons Transcriptome Index. décimale : PER Périodiques Résumé : Background: Autism spectrum disorder (ASD) is a neurodevelopmental disorder with a high co-morbidity of epilepsy and associated with hundreds of rare risk factors. NRXN1 deletion is among the commonest rare genetic factors shared by ASD, schizophrenia, intellectual disability, epilepsy, and developmental delay. However, how NRXN1 deletions lead to different clinical symptoms is unknown. Patient-derived cells are essential to investigate the functional consequences of NRXN1 lesions to human neurons in different diseases. Methods: Skin biopsies were donated by five healthy donors and three ASD patients carrying NRXN1alpha (+/-) deletions. Seven control and six NRXN1alpha (+/-) iPSC lines were derived and differentiated into day 100 cortical excitatory neurons using dual SMAD inhibition. Calcium (Ca(2+)) imaging was performed using Fluo4-AM, and the properties of Ca(2+) transients were compared between two groups of neurons. Transcriptome analysis was carried out to undercover molecular pathways associated with NRXN1alpha (+/-) neurons. Results: NRXN1alpha (+/-) neurons were found to display altered calcium dynamics, with significantly increased frequency, duration, and amplitude of Ca(2+) transients. Whole genome RNA sequencing also revealed altered ion transport and transporter activity, with upregulated voltage-gated calcium channels as one of the most significant pathways in NRXN1alpha (+/-) neurons identified by STRING and GSEA analyses. Conclusions: This is the first report to show that human NRXN1alpha (+/-) neurons derived from ASD patients' iPSCs present novel phenotypes of upregulated VGCCs and increased Ca(2+) transients, which may facilitate the development of drug screening assays for the treatment of ASD. En ligne : http://dx.doi.org/10.1186/s13229-019-0303-3 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=414
Titre : Les tests d'intelligence sociale Type de document : texte imprimé Auteurs : Matthew O'SULLIVAN, Auteur ; Joy Paul GUILFORD, Auteur Editeur : Paris [France] : ECPA - Editions du Centre de Psychologie Appliquée Année de publication : 1978 Importance : 35 p. Format : 15,5cm x 24cm x 0,3cm Note générale : Bibliogr. Langues : Français (fre) Index. décimale : OUT-A OUT-A - Outils d‘Evaluation - Tests Résumé : La connaissance du comportement d'autrui est un des aspects de l'intelligence sociale qui détermine les relations interindividuelles. Elle permet par le biais de l'empathie, de la sensibilité sociale, de notre façon de percevoir autrui, de comprendre ce qu'il est, ce qu'il désire et ce qu'il va faire. Les quatre tests présentés ici, constituent une approche globale de la connaissance du comportement en permettant d'appréhender le niveau de compréhension des expressions, des attitudes et des situations sociales. Le premier test "Histoires à conclure" mesure la connaissance des implications de comportement (aptitude à prévoir les conséquences des attitudes des personnages en situation à partir d'informations données). Il s'agit donc d'extrapoler en prédisant ce qui va se passer ultérieurement. Le deuxième test "Groupes d'expressions" mesure la connaissance des classes de comportement (aptitude à extraire des caractéristiques communes de comportements ou d'expressions). Il faut ici reconnaître les propriétés communes des stimulus. Le troisième test "Expressions verbales" mesure la connaissance des transformations de comportement (aptitude à discerner les sens différents que peut prendre une même information dans des contextes différents). Le dernier test "Histoires à compléter" mesure la connaissance des systèmes de comportement (aptitude à reconnaître la structure de situations sociales). Application : adultes. Passation individuelle ou collective. Temps de passation : environ 1h15 pour les 4 tests. Temps de correction : rapide. [Résumé d'Auteur/Editeur] Note de contenu : 1 feuille de réponse, 1 grille de correction. Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=381 Les tests d'intelligence sociale [texte imprimé] / Matthew O'SULLIVAN, Auteur ; Joy Paul GUILFORD, Auteur . - Paris [France] : ECPA - Editions du Centre de Psychologie Appliquée, 1978 . - 35 p. ; 15,5cm x 24cm x 0,3cm.
Bibliogr.
Langues : Français (fre)
Index. décimale : OUT-A OUT-A - Outils d‘Evaluation - Tests Résumé : La connaissance du comportement d'autrui est un des aspects de l'intelligence sociale qui détermine les relations interindividuelles. Elle permet par le biais de l'empathie, de la sensibilité sociale, de notre façon de percevoir autrui, de comprendre ce qu'il est, ce qu'il désire et ce qu'il va faire. Les quatre tests présentés ici, constituent une approche globale de la connaissance du comportement en permettant d'appréhender le niveau de compréhension des expressions, des attitudes et des situations sociales. Le premier test "Histoires à conclure" mesure la connaissance des implications de comportement (aptitude à prévoir les conséquences des attitudes des personnages en situation à partir d'informations données). Il s'agit donc d'extrapoler en prédisant ce qui va se passer ultérieurement. Le deuxième test "Groupes d'expressions" mesure la connaissance des classes de comportement (aptitude à extraire des caractéristiques communes de comportements ou d'expressions). Il faut ici reconnaître les propriétés communes des stimulus. Le troisième test "Expressions verbales" mesure la connaissance des transformations de comportement (aptitude à discerner les sens différents que peut prendre une même information dans des contextes différents). Le dernier test "Histoires à compléter" mesure la connaissance des systèmes de comportement (aptitude à reconnaître la structure de situations sociales). Application : adultes. Passation individuelle ou collective. Temps de passation : environ 1h15 pour les 4 tests. Temps de correction : rapide. [Résumé d'Auteur/Editeur] Note de contenu : 1 feuille de réponse, 1 grille de correction. Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=381 Exemplaires(0)
Disponibilité aucun exemplaire

