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Ortigoza-Escobar JD, Zamani M, Dorison N, Sadeghian S, Azizimalamiri R, Alvi JR, Sultan T, Galehdari H, Shariati G, Saberi A, Leeuwen L, Zifarelli G, Bauer P, d'Hardemare V, Doummar D, Roze E, Travaglini L, Nicita F, Ojea Ponce N, Zahraei SM, Alabdi L, Tamim A, Hashem MO, Ababneh F, Morrow MM, Curry C, Tam A, Ruedy J, Bhambhani V, Veith R, Strømme P, Efthymiou S, Alkuraya FS, Moreno-De-Luca A, Burglen L, Houlden H, Maroofian R. Biallelic ZBTB11 Variants: A Neurodevelopmental Condition with Progressive Complex Movement Disorders. Mov Disord 2024. [PMID: 38899514 DOI: 10.1002/mds.29883] [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: 07/18/2023] [Revised: 05/08/2024] [Accepted: 05/20/2024] [Indexed: 06/21/2024] Open
Abstract
BACKGROUND Biallelic ZBTB11 variants have previously been associated with an ultrarare subtype of autosomal recessive intellectual developmental disorder (MRT69). OBJECTIVE The aim was to provide insights into the clinical and genetic characteristics of ZBTB11-related disorders (ZBTB11-RD), with a particular emphasis on progressive complex movement abnormalities. METHODS Thirteen new and 16 previously reported affected individuals, ranging in age from 2 to 50 years, with biallelic ZBTB11 variants underwent clinical and genetic characterization. RESULTS All patients exhibited a range of neurodevelopmental phenotypes with varying severity, encompassing ocular and neurological features. Eleven new patients presented with complex abnormal movements, including ataxia, dystonia, myoclonus, stereotypies, and tremor, and 7 new patients exhibited cataracts. Deep brain stimulation was successful in treating 1 patient with generalized progressive dystonia. Our analysis revealed 13 novel variants. CONCLUSIONS This study provides additional insights into the clinical features and spectrum of ZBTB11-RD, highlighting the progressive nature of movement abnormalities in the background of neurodevelopmental phenotype. © 2024 The Author(s). Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Juan Darío Ortigoza-Escobar
- Movement Disorders Unit, Pediatric Neurology Department, Institut de Recerca, Hospital Sant Joan de Déu Barcelona, Barcelona, Spain
- U-703 Centre for Biomedical Research on Rare Diseases (CIBER-ER), Instituto de Salud Carlos III, Barcelona, Spain
- European Reference Network for Rare Neurological Diseases (ERN-RND), Barcelona, Spain
| | - Mina Zamani
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, United Kingdom
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
- Narges Medical Genetics and Prenatal Diagnosis Laboratory, Ahvaz, Iran
| | - Nathalie Dorison
- Unité Dyspa, Neurochirurgie Pédiatrique, Hôpital Fondation Rothschild, Paris, France
| | - Saeid Sadeghian
- Department of Pediatric Neurology, Golestan Medical, Educational, and Research Centre, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Reza Azizimalamiri
- Department of Pediatric Neurology, Golestan Medical, Educational, and Research Centre, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Javeria Raza Alvi
- Department of Pediatric Neurology, The Children's Hospital and the University of Child Health Sciences, Lahore, Pakistan
| | - Tipu Sultan
- Department of Pediatric Neurology, The Children's Hospital and the University of Child Health Sciences, Lahore, Pakistan
| | - Hamid Galehdari
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Gholamreza Shariati
- Narges Medical Genetics and Prenatal Diagnosis Laboratory, Ahvaz, Iran
- Department of Medical Genetics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Alihossein Saberi
- Narges Medical Genetics and Prenatal Diagnosis Laboratory, Ahvaz, Iran
- Department of Medical Genetics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Lisette Leeuwen
- Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | | | | | - Vincent d'Hardemare
- Unité Dyspa, Neurochirurgie Pédiatrique, Hôpital Fondation Rothschild, Paris, France
| | - Diane Doummar
- AP-HP. Sorbonne Université, Service de Neuropédiatrie et Centre de Référence Neurogénétique, Hôpital Armand Trousseau, FHU I2D2, Paris, France
| | - Emmanuel Roze
- Assistance Publique-Hôpitaux de Paris CHU Pitié-Salpêtrière DMU Neurosciences et Sorbonne Université, INSERM, CNRS, Institut du Cerveau, Paris, France
| | - Lorena Travaglini
- Laboratory of Medical Genetics, Translational Cytogenomics Research Unit, IRCCS, Bambino Gesù Children's Hospital, Rome, Italy
| | - Francesco Nicita
- Unit of Neuromuscular and Neurodegenerative Disorders, IRCCS, Bambino Gesù Children's Hospital of Rome, Rome, Italy
| | - Núria Ojea Ponce
- Department of Statistics, Institut de Recerca Sant Joan de Déu Barcelona, Barcelona, Spain
| | | | - Lama Alabdi
- Department of Translational Genomics, Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Abdullah Tamim
- Division of Genetics, Department of Pediatrics, King Abdullah Specialized Children Hospital, King Abdulaziz Medical City, MNGHA, Riyadh, Saudi Arabia
- King Abdullah International Medical Research Center, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Mais O Hashem
- Department of Translational Genomics, Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Faroug Ababneh
- Division of Genetics, Department of Pediatrics, King Abdullah Specialized Children Hospital, King Abdulaziz Medical City, MNGHA, Riyadh, Saudi Arabia
- King Abdullah International Medical Research Center, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | | | - Cynthia Curry
- Department of Pediatrics, Genetic Medicine, UCSF/Fresno, Fresno, California, USA
| | - Allison Tam
- Division of Medical Genetics, Department of Pediatrics, University of California San Francisco, San Francisco, California, USA
| | - Jessica Ruedy
- Genetics Clinic, Children's MN, Minneapolis, Minnesota, USA
| | | | - Regan Veith
- Genetics Clinic, Children's MN, Minneapolis, Minnesota, USA
| | - Petter Strømme
- Division of Pediatrics and Adolescent Medicine, Oslo, University Hospital and Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Stephanie Efthymiou
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, United Kingdom
| | - Fowzan S Alkuraya
- Department of Translational Genomics, Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Andres Moreno-De-Luca
- Department of Radiology, Neuroradiology Section, Kingston Health Sciences Centre, Queen's University Faculty of Health Sciences, Kingston, Ontario, Canada
| | - Lydie Burglen
- Centre de Référence Maladies Rares "Malformations et Maladies Congénitales du Cervelet," Hôpital Trousseau, APHP, Sorbonne University, Paris, France
- Département de Génétique, APHP, Sorbonne University, Paris, France
- Developmental Brain Disorders Laboratory, Imagine Institute, INSERM UMR, Paris, France
| | - Henry Houlden
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, United Kingdom
| | - Reza Maroofian
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, United Kingdom
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Zhu X, Jiang P, Ying X, Tang X, Deng Y, Gao X, Yang X. Pregnancy induced hypertension and umbilical cord blood DNA methylation in newborns: an epigenome-wide DNA methylation study. BMC Pregnancy Childbirth 2024; 24:433. [PMID: 38886689 PMCID: PMC11181590 DOI: 10.1186/s12884-024-06623-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 06/05/2024] [Indexed: 06/20/2024] Open
Abstract
OBJECTIVIES Pregnancy induced hypertension (PIH) syndrome is a disease that unique to pregnant women and is associated with elevated risk of offspring cardiovascular diseases (CVDs) and neurodevelopmental disorders in their kids. Previous research on cord blood utilizing the Human Methylation BeadChip or EPIC array revealed that PIH is associated with specific DNA methylation site. Here, we investigate the whole genome DNA methylation landscape of cord blood from newborns of PIH mother. METHODS Whole-genome bisulfite sequencing (WGBS) was used to examine the changes in whole genome DNA methylation in the umbilical cord blood of three healthy (NC) and four PIH individuals. Using methylKit, we discovered Hypo- and hyper- differentially methylated probes (DMPs) or methylated regions (DMRs) in the PIH patients' cord blood DNA. Pathway enrichments were assessed using Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment assays. DMPs or DMRs relevant to the immunological, neurological, and circulatory systems were also employed for enrichment assay, Metascape analysis and PPI network analysis. RESULTS 520 hyper- and 224 hypo-DMPs, and 374 hyper- and 186 hypo-DMRs between NC and PIH group, respectively. Both DMPs and DMRs have enhanced pathways for cardiovascular, neurological system, and immune system development. Further investigation of DMPs or DMRs related to immunological, neurological, and circulatory system development revealed that TBK1 served as a hub gene for all three developmental pathways. CONCLUSION PIH-associated DMPs or DMRs in umbilical cord blood DNA may play a role in immunological, neurological, and circulatory system development. Abnormal DNA methylation in the immune system may also contribute to the development of CVDs and neurodevelopment disorders.
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Affiliation(s)
- Xiaojun Zhu
- Department of Obstetrics, Women's Hospital, Medicine School of Zhejiang University, Hangzhou, 310006, China
| | - Peiyue Jiang
- Department of Obstetrics, Women's Hospital, Medicine School of Zhejiang University, Hangzhou, 310006, China
| | - Xia Ying
- Department of Obstetrics, Women's Hospital, Medicine School of Zhejiang University, Hangzhou, 310006, China
| | - Xueling Tang
- Department of Obstetrics, Women's Hospital, Medicine School of Zhejiang University, Hangzhou, 310006, China
| | - Youcai Deng
- Department of Hematology, College of Pharmacy and Laboratory Medicine Science, Army Medical University, Chongqing, 400038, China
| | - Xinghong Gao
- School of Basic Medicine, Zunyi Medical University, Zunyi , Guizhou, 563006, China.
| | - Xiaofu Yang
- Department of Obstetrics, Women's Hospital, Medicine School of Zhejiang University, Hangzhou, 310006, China.
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van Boven MA, Mestroni M, Zwijnenburg PJG, Verhage M, Cornelisse LN. A de novo missense mutation in synaptotagmin-1 associated with neurodevelopmental disorder desynchronizes neurotransmitter release. Mol Psychiatry 2024:10.1038/s41380-024-02444-5. [PMID: 38321119 DOI: 10.1038/s41380-024-02444-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 01/12/2024] [Accepted: 01/22/2024] [Indexed: 02/08/2024]
Abstract
Synaptotagmin-1 (Syt1) is a presynaptic calcium sensor with two calcium binding domains, C2A and C2B, that triggers action potential-induced synchronous neurotransmitter release, while suppressing asynchronous and spontaneous release. We identified a de novo missense mutation (P401L) in the C2B domain in a patient with developmental delay and autistic symptoms. Expressing the orthologous mouse mutant (P400L) in cultured Syt1 null mutant neurons revealed a reduction in dendrite outgrowth with a proportional reduction in synapses. This was not observed in single Syt1PL-rescued neurons that received normal synaptic input when cultured in a control network. Patch-clamp recordings showed that spontaneous miniature release events per synapse were increased more than 500% in Syt1PL-rescued neurons, even beyond the increased rates in Syt1 KO neurons. Furthermore, action potential-induced asynchronous release was increased more than 100%, while synchronous release was unaffected. A similar shift to more asynchronous release was observed during train stimulations. These cellular phenotypes were also observed when Syt1PL was overexpressed in wild type neurons. Our findings show that Syt1PL desynchronizes neurotransmission by increasing the readily releasable pool for asynchronous release and reducing the suppression of spontaneous and asynchronous release. Neurons respond to this by shortening their dendrites, possibly to counteract the increased synaptic input. Syt1PL acts in a dominant-negative manner supporting a causative role for the mutation in the heterozygous patient. We propose that the substitution of a rigid proline to a more flexible leucine at the bottom of the C2B domain impairs clamping of release by interfering with Syt1's primary interface with the SNARE complex. This is a novel cellular phenotype, distinct from what was previously found for other SYT1 disease variants, and points to a role for spontaneous and asynchronous release in SYT1-associated neurodevelopmental disorder.
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Affiliation(s)
- Maaike A van Boven
- Department of Functional Genomics, Center for Neurogenomics and Cognitive Research (CNCR), Vrije Universiteit (VU) Amsterdam, 1081 HV, Amsterdam, The Netherlands
| | - Marta Mestroni
- Department of Functional Genomics, Center for Neurogenomics and Cognitive Research (CNCR), Vrije Universiteit (VU) Amsterdam, 1081 HV, Amsterdam, The Netherlands
| | | | - Matthijs Verhage
- Department of Functional Genomics, Center for Neurogenomics and Cognitive Research (CNCR), Vrije Universiteit (VU) Amsterdam, 1081 HV, Amsterdam, The Netherlands
- Department of Functional Genomics and Department of Human Genetics, Center for Neurogenomics and Cognitive Research (CNCR), Amsterdam UMC-Location VUmc, 1081 HV, Amsterdam, The Netherlands
| | - L Niels Cornelisse
- Department of Functional Genomics and Department of Human Genetics, Center for Neurogenomics and Cognitive Research (CNCR), Amsterdam UMC-Location VUmc, 1081 HV, Amsterdam, The Netherlands.
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Porto MB, Castro GDME, Pereira SSS, Uchoa EMGS, Zatarin R, Minasi LB, da Cruz AD. c.1103T>C (p.Ile368Th) de novo Variant in Synaptotagmin 1 ( SYT1) Gene is Pathogenic, Leading to an Ultra-Rare Neurodevelopmental Disorder: The Baker-Gordon Syndrome. Int Med Case Rep J 2024; 17:63-70. [PMID: 38283597 PMCID: PMC10822096 DOI: 10.2147/imcrj.s448555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 01/17/2024] [Indexed: 01/30/2024] Open
Abstract
Baker-Gordon Syndrome (BAGOS) is a genetically determined 4 (NDD), represented by a phenotypic spectrum of moderate to severe intellectual disability, resulting from mutations in the synaptotagmin 1 (SYT1) gene. Its prevalence is estimated at 1:1,000,000 and the known gene variants have indicated complete penetrance with variable expressivity. SYT1 is a membrane trafficking protein in presynaptic vesicles, which exerts a complex influence on synaptic transmission, with fundamental roles in the release of neurotransmitters and facilitators of endocytosis, impacting both neurotransmission and neuron plasticity. The current case report describes the first Brazilian male patient diagnosed at 17-year-old, and the 39th reported case globally using whole-exome sequencing. A de novo heterozygous missense mutation at chr12q:79448958 (NM_005639.2; c.1103T>C; p.Ile368Thr) in the SYT1 was found and classified as a pathogenic variant. The proband's clinical phenotype was compatible with BAGOS, involving behavioral changes such as irritability and severe intellectual disability. Knowledge about the mechanism of action and the extent of the genotypic and phenotypic presentations of the mutations in the SYT1 is still unfolding. Thus, we aimed to describe additional genotype-phenotype correlation for BAGOS, contributing to the expansion of the existing knowledge of such a heterogeneous ultra-rare syndrome, and, therefore, improve its diagnostic yield, case management, and therapeutic journey for future patients.
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Affiliation(s)
- Milena Barbosa Porto
- Graduate Program in Genetics, School of Medical and Life Sciences, Pontifical Catholic University of Goiás, Goiânia, GO, Brazil
| | - Geovanna da Mata e Castro
- Graduate Program in Genetics, School of Medical and Life Sciences, Pontifical Catholic University of Goiás, Goiânia, GO, Brazil
| | | | | | - Raffael Zatarin
- Clinical Genetics Service, Center for Rehabilitation and Readaptation Dr. Henrique Santillo, State Health Secretary of Goiás, Goiânia, GO, Brazil
| | - Lysa Bernardes Minasi
- Graduate Program in Genetics, School of Medical and Life Sciences, Pontifical Catholic University of Goiás, Goiânia, GO, Brazil
| | - Aparecido D da Cruz
- Graduate Program in Genetics, School of Medical and Life Sciences, Pontifical Catholic University of Goiás, Goiânia, GO, Brazil
- Federal University of Goiás, Graduate Program in Genetics and Molecular Biology, Goiânia, GO, Brazil
- Clinical Genetics Service, Center for Rehabilitation and Readaptation Dr. Henrique Santillo, State Health Secretary of Goiás, Goiânia, GO, Brazil
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Huang W, Yang Y, Che F, Wu H, Ma Y, Zhao Y. Lethal variant in the C2A domain may cause severe SYT1-associated neurodevelopmental disorder in the newborns. Neurogenetics 2024; 25:27-31. [PMID: 37930470 DOI: 10.1007/s10048-023-00738-4] [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: 07/07/2023] [Accepted: 10/22/2023] [Indexed: 11/07/2023]
Abstract
Synaptotagmin-1 (SYT1) plays a pivotal role in regulating presynaptic processes, including neurotransmitter release. SYT1 variants perturb synaptic vesicle endocytosis and exocytosis, resulting in a series of neurodevelopmental disorders defined as Baker-Gordon syndrome. Herein, we report the case of a newborn with dysmorphic facial appearance, severe hypotonia, poor feeding, gastroesophageal reflux, and an inability to eat and breathe, diagnosed with Baker-Gordon syndrome. A retrospective search was performed on a newborn with Baker-Gordon syndrome. Medical charts were reviewed, with focus on the clinical presentation, diagnostic process, and treatment outcomes. Whole-genome high-throughput DNA sequencing was performed to identify genetic variants. Whole-exome sequencing identified the likely pathogenic variant as SYT1 C.551 T > C(p.V184A). Sanger sequencing results indicated that this variant was a de novo mutation in a conservative site located in the C2A domain of the protein. The patient died at 57 days old because of severe feeding and breathing problems. Our findings of a novel lethal variant in the C2A domain of SYT1 in the youngest patient diagnosed infantile Baker-Gordon syndrome who presented with the most severe hypotonia reported to date expands the spectrum of SYT1- associated neurodevelopmental disorders.
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Affiliation(s)
- Wendi Huang
- Department of Neonatology, Xi'an Children's Hospital, No. 69 Xijuyuan Lane, Lianhu District, Xi'an City, 710003, Shaanxi, China
| | - Ying Yang
- Shaanxi Institute for Pediatric Diseases, Xi'an Children's Hospital, Xi'an, China
| | - Fengyu Che
- Shaanxi Institute for Pediatric Diseases, Xi'an Children's Hospital, Xi'an, China
| | - Haibin Wu
- Shaanxi Institute for Pediatric Diseases, Xi'an Children's Hospital, Xi'an, China
| | - Ying Ma
- Department of Neonatology, Xi'an Children's Hospital, No. 69 Xijuyuan Lane, Lianhu District, Xi'an City, 710003, Shaanxi, China
| | - Yujuan Zhao
- Department of Neonatology, Xi'an Children's Hospital, No. 69 Xijuyuan Lane, Lianhu District, Xi'an City, 710003, Shaanxi, China.
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Cesaroni CA, Spagnoli C, Baga M, Rizzi S, Frattini D, Caraffi SG, Pollazzon M, Garavelli L, Fusco C. Expanding Phenotype of SYT1-Related Neurodevelopmental Disorder: Case Report and Literature Review. Mol Syndromol 2023; 14:493-497. [PMID: 38058756 PMCID: PMC10697692 DOI: 10.1159/000530586] [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: 08/17/2022] [Accepted: 03/28/2023] [Indexed: 12/08/2023] Open
Abstract
Introduction Synaptotagmin 1 (SYT1), the predominant SYT isoform in the central nervous system, likely acts by promoting vesicle docking, deforming the plasma membrane via Ca2+-dependent membrane penetration. Case Presentation Here, we describe a 21-year-old woman harboring a novel variant in the SYT1 gene, who presents with a complex phenotype, featuring severe intellectual disability, absent speech, behavioral abnormalities, motor stereotypies, dystonic posturing of her hands, a hyperkinetic movement disorder in her childhood, infantile hypotonia, sialorrhea, mild dysmorphic features, epilepsy, peculiar EEG findings, and severe scoliosis. Discussion Based on our case and literature review on the 22 previously described patients, we can confirm a complex neurodevelopmental disorder in which, unlike other synaptopathies, epilepsy is present in a subset of cases (including our patient: 5/23, 22%), although characteristic EEG changes are far more common (10/23, 43.5%). Our patient's age allows us to provide long-term follow-up data and thus better delineate the SYT1-related clinical phenotype.
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Affiliation(s)
- Carlo Alberto Cesaroni
- Dipartimento Materno-Infantile, Struttura Complessa di Neuropsichiatria Infantile, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
- IRCCS Istituto delle Scienze Neurologiche di Bologna, U.O.C. Neuropsichiatria dell’età pediatrica, Bologna, Italy
| | - Carlotta Spagnoli
- Dipartimento Materno-Infantile, Struttura Complessa di Neuropsichiatria Infantile, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Margherita Baga
- Dipartimento Materno-Infantile, Struttura Complessa di Neuropsichiatria Infantile, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Susanna Rizzi
- Dipartimento Materno-Infantile, Struttura Complessa di Neuropsichiatria Infantile, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Daniele Frattini
- Dipartimento Materno-Infantile, Struttura Complessa di Neuropsichiatria Infantile, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Stefano Giuseppe Caraffi
- Dipartimento Materno-Infantile, Struttura Complessa di Genetica Medica, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Marzia Pollazzon
- Dipartimento Materno-Infantile, Struttura Complessa di Genetica Medica, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Livia Garavelli
- Dipartimento Materno-Infantile, Struttura Complessa di Genetica Medica, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Carlo Fusco
- Dipartimento Materno-Infantile, Struttura Complessa di Neuropsichiatria Infantile, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
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Al-Jawahiri R, Stokes L, Smith H, McNeill A, Freeth M. Short report: Behavioural characterisation of SOX11 syndrome. RESEARCH IN DEVELOPMENTAL DISABILITIES 2023; 143:104623. [PMID: 37924570 DOI: 10.1016/j.ridd.2023.104623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 10/06/2023] [Accepted: 10/18/2023] [Indexed: 11/06/2023]
Abstract
BACKGROUND SOX11 syndrome is a rare condition caused by deletions or de novo point mutations of the SOX11 gene. SOX11 is a transcription factor gene that plays an important role in brain development. AIMS The aim of this study was to quantitatively evaluate the behavioural profiles of individuals with SOX11 syndrome. METHODS AND PROCEDURES The Vineland Adaptive Behaviour Scales 3 (VABS-3) and the Social Responsiveness Scale 2 (SRS-2) were completed by parents of 21 children and young adults with SOX11 syndrome. OUTCOMES AND RESULTS Most were found to have borderline (33 %) or mild (39 %) impairment in adaptive behaviour, with more difficulties in communication and daily living than socialisation in the cohort overall. Most (90 %) were found to exhibit clinically relevant levels of autistic traits, with 62 % scoring in the "severe" range, though social motivation was observed to be a relative strength in the cohort overall. CONCLUSIONS AND IMPLICATIONS This study presents the first standardised evaluation of adaptive behaviour and autistic traits of individuals with SOX11 syndrome. This will improve clinicians, educators and parents' understanding of SOX11 syndrome.
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Affiliation(s)
| | - Louis Stokes
- University of Sheffield, Sheffield S10 2TN, United Kingdom
| | - Harriet Smith
- University of Sheffield, Sheffield S10 2TN, United Kingdom
| | | | - Megan Freeth
- University of Sheffield, Sheffield S10 2TN, United Kingdom.
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Jo D, Arjunan A, Choi S, Jung YS, Park J, Jo J, Kim OY, Song J. Oligonol ameliorates liver function and brain function in the 5 × FAD mouse model: transcriptional and cellular analysis. Food Funct 2023; 14:9650-9670. [PMID: 37843873 DOI: 10.1039/d3fo03451h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2023]
Abstract
Alzheimer's disease (AD) is a common neurodegenerative disease worldwide and is accompanied by memory deficits, personality changes, anxiety, depression, and social difficulties. For treatment of AD, many researchers have attempted to find medicinal resources with high effectiveness and without side effects. Oligonol is a low molecular weight polypeptide derived from lychee fruit extract. We investigated the effects of oligonol in 5 × FAD transgenic AD mice, which developed severe amyloid pathology, through behavioral tests (Barnes maze, marble burying, and nestle shredding) and molecular experiments. Oligonol treatment attenuated blood glucose levels and increased the antioxidant response in the livers of 5 × FAD mice. Moreover, the behavioral score data showed improvements in anxiety, depressive behavior, and cognitive impairment following a 2-month course of orally administered oligonol. Oligonol treatment not only altered the circulating levels of cytokines and adipokines in 5 × FAD mice, but also significantly enhanced the mRNA and protein levels of antioxidant enzymes and synaptic plasticity in the brain cortex and hippocampus. Therefore, we highlight the therapeutic potential of oligonol to attenuate neuropsychiatric problems and improve memory deficits in the early stage of AD.
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Affiliation(s)
- Danbi Jo
- Department of Anatomy, Chonnam National University Medical School, Seoyangro 264, Hwasun 58128, Republic of Korea.
- Biomedical Science Graduate Program (BMSGP), Chonnam National University, Seoyangro 264, Hwasun 58128, Republic of Korea
| | - Archana Arjunan
- Department of Anatomy, Chonnam National University Medical School, Seoyangro 264, Hwasun 58128, Republic of Korea.
| | - Seoyoon Choi
- Department of Anatomy, Chonnam National University Medical School, Seoyangro 264, Hwasun 58128, Republic of Korea.
- Biomedical Science Graduate Program (BMSGP), Chonnam National University, Seoyangro 264, Hwasun 58128, Republic of Korea
| | - Yoon Seok Jung
- Department of Anatomy, Chonnam National University Medical School, Seoyangro 264, Hwasun 58128, Republic of Korea.
| | - Jihyun Park
- Department of Food Science and Nutrition, Dong-A University, Nakdong-daero 550 beon-gil, Saha-gu, Busan, 49315, Republic of Korea.
- Department of Health Sciences, Graduate School of Dong-A University, Nakdong-daero 550 beon-gil, Saha-gu, Busan, 49315, Republic of Korea
| | - Jihoon Jo
- Department of Biomedical Science, Chonnam National University Medical School, Seoyangro 264, Hwasun 58128, Republic of Korea.
| | - Oh Yoen Kim
- Department of Food Science and Nutrition, Dong-A University, Nakdong-daero 550 beon-gil, Saha-gu, Busan, 49315, Republic of Korea.
- Department of Health Sciences, Graduate School of Dong-A University, Nakdong-daero 550 beon-gil, Saha-gu, Busan, 49315, Republic of Korea
| | - Juhyun Song
- Department of Anatomy, Chonnam National University Medical School, Seoyangro 264, Hwasun 58128, Republic of Korea.
- Biomedical Science Graduate Program (BMSGP), Chonnam National University, Seoyangro 264, Hwasun 58128, Republic of Korea
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Uzay B, Kavalali ET. Genetic disorders of neurotransmitter release machinery. Front Synaptic Neurosci 2023; 15:1148957. [PMID: 37066095 PMCID: PMC10102358 DOI: 10.3389/fnsyn.2023.1148957] [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: 01/20/2023] [Accepted: 03/10/2023] [Indexed: 04/03/2023] Open
Abstract
Synaptic neurotransmitter release is an evolutionarily conserved process that mediates rapid information transfer between neurons as well as several peripheral tissues. Release of neurotransmitters are ensured by successive events such as synaptic vesicle docking and priming that prepare synaptic vesicles for rapid fusion. These events are orchestrated by interaction of different presynaptic proteins and are regulated by presynaptic calcium. Recent studies have identified various mutations in different components of neurotransmitter release machinery resulting in aberrant neurotransmitter release, which underlie a wide spectrum of psychiatric and neurological symptoms. Here, we review how these genetic alterations in different components of the core neurotransmitter release machinery affect the information transfer between neurons and how aberrant synaptic release affects nervous system function.
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Affiliation(s)
- Burak Uzay
- Vanderbilt Brain Institute, Nashville, TN, United States
- Department of Pharmacology, Vanderbilt University, Nashville, TN, United States
| | - Ege T. Kavalali
- Vanderbilt Brain Institute, Nashville, TN, United States
- Department of Pharmacology, Vanderbilt University, Nashville, TN, United States
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Zhou Q. Calcium Sensors of Neurotransmitter Release. ADVANCES IN NEUROBIOLOGY 2023; 33:119-138. [PMID: 37615865 DOI: 10.1007/978-3-031-34229-5_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Abstract
Calcium (Ca2+) plays a critical role in triggering all three primary modes of neurotransmitter release (synchronous, asynchronous, and spontaneous). Synaptotagmin1, a protein with two C2 domains, is the first isoform of the synaptotagmin family that was identified and demonstrated as the primary Ca2+ sensor for synchronous neurotransmitter release. Other isoforms of the synaptotagmin family as well as other C2 proteins such as the double C2 domain protein family were found to act as Ca2+ sensors for different modes of neurotransmitter release. Major recent advances and previous data suggest a new model, release-of-inhibition, for the initiation of Ca2+-triggered synchronous neurotransmitter release. Synaptotagmin1 binds Ca2+ via its two C2 domains and relieves a primed pre-fusion machinery. Before Ca2+ triggering, synaptotagmin1 interacts Ca2+ independently with partially zippered SNARE complexes, the plasma membrane, phospholipids, and other components to form a primed pre-fusion state that is ready for fast release. However, membrane fusion is inhibited until the arrival of Ca2+ reorients the Ca2+-binding loops of the C2 domain to perturb the lipid bilayers, help bridge the membranes, and/or induce membrane curvatures, which serves as a power stroke to activate fusion. This chapter reviews the evidence supporting these models and discusses the molecular interactions that may underlie these abilities.
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Affiliation(s)
- Qiangjun Zhou
- Department of Cell and Developmental Biology, Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN, USA.
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Riggs E, Shakkour Z, Anderson CL, Carney PR. SYT1-Associated Neurodevelopmental Disorder: A Narrative Review. CHILDREN 2022; 9:children9101439. [PMID: 36291375 PMCID: PMC9601251 DOI: 10.3390/children9101439] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 09/13/2022] [Accepted: 09/15/2022] [Indexed: 11/16/2022]
Abstract
Synaptic dysregulations often result in damaging effects on the central nervous system, resulting in a wide range of brain and neurodevelopment disorders that are caused by mutations disrupting synaptic proteins. SYT1, an identified synaptotagmin protein, plays an essential role in mediating the release of calcium-triggered neurotransmitters (NT) involved in regular synaptic vesicle exocytosis. Considering the significant role of SYT1 in the physiology of synaptic neurotransmission, dysfunction and degeneration of this protein can result in a severe neurological impairment. Genetic variants lead to a newly discovered rare disorder, known as SYT1-associated neurodevelopment disorder. In this review, we will discuss in depth the function of SYT1 in synapse and the underlying molecular mechanisms. We will highlight the genetic basis of SYT1-associated neurodevelopmental disorder along with known phenotypes, with possible interventions and direction of research.
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Affiliation(s)
- Edith Riggs
- College of Osteopathic Medicine, Kansas City University School of Medicine, Kansas City, MO 64106, USA
| | - Zaynab Shakkour
- School of Medicine, University of Missouri Child Health, Columbia, MO 65201, USA
| | - Christopher L. Anderson
- School of Medicine, University of Missouri Child Health, Columbia, MO 65201, USA
- Correspondence:
| | - Paul R. Carney
- School of Medicine, University of Missouri Child Health, Columbia, MO 65201, USA
- Department of Engineering, University of Missouri Biomedical Engineering, Columbia, MO 65201, USA
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