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Bonzano S, Dallorto E, Bovetti S, Studer M, De Marchis S. Mitochondrial regulation of adult hippocampal neurogenesis: Insights into neurological function and neurodevelopmental disorders. Neurobiol Dis 2024; 199:106604. [PMID: 39002810 DOI: 10.1016/j.nbd.2024.106604] [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: 06/10/2024] [Revised: 07/08/2024] [Accepted: 07/09/2024] [Indexed: 07/15/2024] Open
Abstract
Mitochondria are essential regulators of cellular energy metabolism and play a crucial role in the maintenance and function of neuronal cells. Studies in the last decade have highlighted the importance of mitochondrial dynamics and bioenergetics in adult neurogenesis, a process that significantly influences cognitive function and brain plasticity. In this review, we examine the mechanisms by which mitochondria regulate adult neurogenesis, focusing on the impact of mitochondrial function on the behavior of neural stem/progenitor cells and the maturation and plasticity of newborn neurons in the adult mouse hippocampus. In addition, we explore the link between mitochondrial dysfunction, adult hippocampal neurogenesis and genes associated with cognitive deficits in neurodevelopmental disorders. In particular, we provide insights into how alterations in the transcriptional regulator NR2F1 affect mitochondrial dynamics and may contribute to the pathophysiology of the emerging neurodevelopmental disorder Bosch-Boonstra-Schaaf optic atrophy syndrome (BBSOAS). Understanding how genes involved in embryonic and adult neurogenesis affect mitochondrial function in neurological diseases might open new directions for therapeutic interventions aimed at boosting mitochondrial function during postnatal life.
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Affiliation(s)
- Sara Bonzano
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Via Accademia Albertina 13, Turin 10123, Italy; Neuroscience Institute Cavalieri Ottolenghi (NICO), Regione Gonzole 10, Orbassano 10043, Italy
| | - Eleonora Dallorto
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Via Accademia Albertina 13, Turin 10123, Italy; Neuroscience Institute Cavalieri Ottolenghi (NICO), Regione Gonzole 10, Orbassano 10043, Italy; Institute de Biologie Valrose (iBV), Université Cote d'Azur (UCA), CNRS 7277, Inserm 1091, Avenue Valrose 28, Nice 06108, France
| | - Serena Bovetti
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Via Accademia Albertina 13, Turin 10123, Italy; Neuroscience Institute Cavalieri Ottolenghi (NICO), Regione Gonzole 10, Orbassano 10043, Italy
| | - Michèle Studer
- Institute de Biologie Valrose (iBV), Université Cote d'Azur (UCA), CNRS 7277, Inserm 1091, Avenue Valrose 28, Nice 06108, France
| | - Silvia De Marchis
- Department of Life Sciences and Systems Biology (DBIOS), University of Turin, Via Accademia Albertina 13, Turin 10123, Italy; Neuroscience Institute Cavalieri Ottolenghi (NICO), Regione Gonzole 10, Orbassano 10043, Italy.
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2
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Sun Y, Guo L, Sha J, Tao H, Wang X, Liu Y, Zhai J, Wu J, Zhao Y. A fetus with Bosch-Boonstra-Schaaf optic atrophy syndrome characterized by bilateral ventricle widening: A case report and related literature review. Medicine (Baltimore) 2022; 101:e30558. [PMID: 36221391 PMCID: PMC9543064 DOI: 10.1097/md.0000000000030558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
RATIONALE Bosch-Boonstra-Schaaf optic atrophy syndrome (BBSOAS) is a rare neurodevelopmental disorder caused by loss-of-function variants in the Nuclear Receptor Subfamily 2 Group F Member 1 (NR2F1). Here, we report a case of fetal BBSOAS. The fetus is typically featured by bilateral ventricle widening in the late second trimester, meanwhile, a 7.94-Mb deletion fragment on 5q14.3q15 involving the whole NR2F1 gene was confirmed by copy number variation sequencing (CNV-Seq) combined with karyotyping analysis. Our aim is to provide comprehensive prenatal clinical management strategy for fetal BBSOAS. PATIENT CONCERNS A 29-year-old primipara and her husband were referred to our prenatal diagnosis center due to the widening of bilateral ventricles at 29 + 1 weeks of gestation age. DIAGNOSES Ultrasound revealed the fetal widening posterior horns of bilateral ventricles at the GA of 27 + 3 weeks, 11 mm on the left and 10 mm on the right. At the following 29 + 1 weeks, ultrasound showed the posterior horn of the left lateral ventricle: 12 mm while the width of the right decreased to 9 mm, and intracranial arachnoid cyst. Furthermore, MRI confirmed that intracranial cyst might originate from an enlarged cisterna venae magnae cerebri, with mild dilation of 13.5 mm on the left ventricle. The fetal karyotyping analysis and CNV-Seq detection confirmed a 7.94-Mb deleted fragment on 5q14.3q15 (89340000_97280000) through the amniocentesis at 29 + 4 weeks of GA. INTERVENTIONS The fetus was closely monitored and underwent the following assessment by the multidisciplinary team. OUTCOMES The pregnancy was terminated in the end. LESSONS It is vital to use molecular and cytogenetical detections combined with a dynamic development history to make a definite diagnosis and evaluate the genetic status for the fetuses with BBSOAS.
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Affiliation(s)
- Yu Sun
- Graduate School of Xuzhou Medical University, Jiangsu Xuzhou, China
- Department of Prenatal Diagnosis Medical Center, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, Jiangsu, China
- Department of obstetrics, Fengxian People’s Hospital, Xuzhou, Jiangsu, China
| | - Lili Guo
- Department of Prenatal Diagnosis Medical Center, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, Jiangsu, China
- Graduate School of Bengbu Medical College, Bengbu, Anhui, China
| | - Jing Sha
- Department of Prenatal Diagnosis Medical Center, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Huimin Tao
- Graduate School of Xuzhou Medical University, Jiangsu Xuzhou, China
- Department of Prenatal Diagnosis Medical Center, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Xuezhen Wang
- Department of Prenatal Diagnosis Medical Center, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, Jiangsu, China
- Graduate School of Bengbu Medical College, Bengbu, Anhui, China
| | - Ying Liu
- Department of Prenatal Diagnosis Medical Center, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Jingfang Zhai
- Graduate School of Xuzhou Medical University, Jiangsu Xuzhou, China
- Department of Prenatal Diagnosis Medical Center, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, Jiangsu, China
- *Correspondence: Jingfang Zhai, Department of Prenatal Diagnosis Medical Center, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Jiefang South Road No.199, Xuzhou, Jiangsu, 221009, China (e-mail: )
| | - Jiebin Wu
- Graduate School of Xuzhou Medical University, Jiangsu Xuzhou, China
- Department of Prenatal Diagnosis Medical Center, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Yongxiu Zhao
- Department of laboratory, Taixing Maternity and Child Health Care Hospital, Taixing, Jiangsu, China
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3
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Kocaaga A, Yimenicioglu S, Gürsoy HH. Novel NR2F1 variant identified by whole-exome sequencing in a patient with Bosch-Boonstra-Schaaf optic atrophy syndrome. Indian J Ophthalmol 2022; 70:2762-2764. [PMID: 35791240 PMCID: PMC9426133 DOI: 10.4103/ijo.ijo_1061_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Bosch–Boonstra–Schaaf optic atrophy syndrome (BBSOAS) is an extremely rare autosomal dominant disorder characterized by intellectual disability, developmental delay, seizures, hypotonia, hearing loss, and optic nerve atrophy. This syndrome is caused by loss-of-function variants in the nuclear receptor subfamily 2 group F member 1 (NR2F1) gene. To date, approximately 80 patients have been reported with BBSOAS. Here, we describe a 3-year-old infant with delayed development, intellectual disability, strabismus, nystagmus, and optic atrophy with well-characterized features associated with BBSOAS. Whole-exome sequencing revealed a novel heterozygous missense mutation (NM_005654.6:c.437G>A, p.Cys146Tyr) in the NR2F1 gene. This missense variant is predicted to be deleterious by the protein prediction tools (SIFT, PolyPhen-2, and MutationTaster). To the best of our knowledge, this is the first patient with BBSOAS reported from Turkey.
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Affiliation(s)
- Ayca Kocaaga
- Department of Medical Genetics, Eskişehir City Hospital, Eskişehir, Turkey
| | - Sevgi Yimenicioglu
- Department of Pediatric Neurology, Eskişehir City Hospital, Eskişehir, Turkey
| | - Haluk Hüseyin Gürsoy
- Department of Ophtalmology, Eskisehir Osmangazi University Hospital, Eskişehir, Turkey
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Pathophysiological Heterogeneity of the BBSOA Neurodevelopmental Syndrome. Cells 2022; 11:cells11081260. [PMID: 35455940 PMCID: PMC9024734 DOI: 10.3390/cells11081260] [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] [Received: 02/03/2022] [Revised: 03/17/2022] [Accepted: 03/29/2022] [Indexed: 11/17/2022] Open
Abstract
The formation and maturation of the human brain is regulated by highly coordinated developmental events, such as neural cell proliferation, migration and differentiation. Any impairment of these interconnected multi-factorial processes can affect brain structure and function and lead to distinctive neurodevelopmental disorders. Here, we review the pathophysiology of the Bosch–Boonstra–Schaaf Optic Atrophy Syndrome (BBSOAS; OMIM 615722; ORPHA 401777), a recently described monogenic neurodevelopmental syndrome caused by the haploinsufficiency of NR2F1 gene, a key transcriptional regulator of brain development. Although intellectual disability, developmental delay and visual impairment are arguably the most common symptoms affecting BBSOAS patients, multiple additional features are often reported, including epilepsy, autistic traits and hypotonia. The presence of specific symptoms and their variable level of severity might depend on still poorly characterized genotype–phenotype correlations. We begin with an overview of the several mutations of NR2F1 identified to date, then further focuses on the main pathological features of BBSOAS patients, providing evidence—whenever possible—for the existing genotype–phenotype correlations. On the clinical side, we lay out an up-to-date list of clinical examinations and therapeutic interventions recommended for children with BBSOAS. On the experimental side, we describe state-of-the-art in vivo and in vitro studies aiming at deciphering the role of mouse Nr2f1, in physiological conditions and in pathological contexts, underlying the BBSOAS features. Furthermore, by modeling distinct NR2F1 genetic alterations in terms of dimer formation and nuclear receptor binding efficiencies, we attempt to estimate the total amounts of functional NR2F1 acting in developing brain cells in normal and pathological conditions. Finally, using the NR2F1 gene and BBSOAS as a paradigm of monogenic rare neurodevelopmental disorder, we aim to set the path for future explorations of causative links between impaired brain development and the appearance of symptoms in human neurological syndromes.
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Billiet B, Amati-Bonneau P, Desquiret-Dumas V, Guehlouz K, Milea D, Gohier P, Lenaers G, Mirebeau-Prunier D, den Dunnen JT, Reynier P, Ferré M. NR2F1 database: 112 variants and 84 patients support refining the clinical synopsis of Bosch-Boonstra-Schaaf optic atrophy syndrome. Hum Mutat 2021; 43:128-142. [PMID: 34837429 DOI: 10.1002/humu.24305] [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: 06/21/2021] [Revised: 10/12/2021] [Accepted: 11/16/2021] [Indexed: 11/09/2022]
Abstract
Pathogenic variants of the nuclear receptor subfamily 2 group F member 1 gene (NR2F1) are responsible for Bosch-Boonstra-Schaaf optic atrophy syndrome (BBSOAS), an autosomal dominant disorder characterized by optic atrophy associated with developmental delay and intellectual disability, but with a clinical presentation which appears to be multifaceted. We created the first public locus-specific database dedicated to NR2F1. All variants and clinical cases reported in the literature, as well as new unpublished cases, were integrated into the database using standard nomenclature to describe both molecular and phenotypic anomalies. We subsequently pursued a comprehensive approach based on computed representation and analysis suggesting a refinement of the BBSOAS clinical description with respect to neurological features and the inclusion of additional signs of hypotonia and feeding difficulties. This database is fully accessible for both clinician and molecular biologists and should prove useful in further refining the clinical synopsis of NR2F1 as new data is recorded.
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Affiliation(s)
- Benjamin Billiet
- Département d'Ophtalmologie, Centre Hospitalier Universitaire d'Angers, Angers, France
| | - Patrizia Amati-Bonneau
- Unité MITOVASC, Équipe Mitolab, SFR ICAT, INSERM, CNRS, Université d'Angers, Angers, France.,Laboratoire de Biochimie et Biologie moléculaire, Centre Hospitalier Universitaire d'Angers, Angers, France
| | - Valérie Desquiret-Dumas
- Unité MITOVASC, Équipe Mitolab, SFR ICAT, INSERM, CNRS, Université d'Angers, Angers, France.,Laboratoire de Biochimie et Biologie moléculaire, Centre Hospitalier Universitaire d'Angers, Angers, France
| | - Khadidja Guehlouz
- Département d'Ophtalmologie, Centre Hospitalier Universitaire d'Angers, Angers, France
| | - Dan Milea
- Singapore Eye Research Institute, Singapore National Eye Centre, Duke-NUS, Singapore
| | - Philippe Gohier
- Département d'Ophtalmologie, Centre Hospitalier Universitaire d'Angers, Angers, France
| | - Guy Lenaers
- Unité MITOVASC, Équipe Mitolab, SFR ICAT, INSERM, CNRS, Université d'Angers, Angers, France
| | - Delphine Mirebeau-Prunier
- Unité MITOVASC, Équipe Mitolab, SFR ICAT, INSERM, CNRS, Université d'Angers, Angers, France.,Laboratoire de Biochimie et Biologie moléculaire, Centre Hospitalier Universitaire d'Angers, Angers, France
| | - Johan T den Dunnen
- Department of Human Genetics, Department of Clinical Genetics, Leiden University Medical Centre, Leiden, The Netherlands
| | - Pascal Reynier
- Unité MITOVASC, Équipe Mitolab, SFR ICAT, INSERM, CNRS, Université d'Angers, Angers, France.,Laboratoire de Biochimie et Biologie moléculaire, Centre Hospitalier Universitaire d'Angers, Angers, France
| | - Marc Ferré
- Unité MITOVASC, Équipe Mitolab, SFR ICAT, INSERM, CNRS, Université d'Angers, Angers, France
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Rech ME, McCarthy JM, Chen CA, Edmond JC, Shah VS, Bosch DGM, Berry GT, Williams L, Madan-Khetarpal S, Niyazov D, Shaw-Smith C, Kovar EM, Lupo PJ, Schaaf CP. Phenotypic expansion of Bosch-Boonstra-Schaaf optic atrophy syndrome and further evidence for genotype-phenotype correlations. Am J Med Genet A 2020; 182:1426-1437. [PMID: 32275123 DOI: 10.1002/ajmg.a.61580] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 03/06/2020] [Accepted: 03/13/2020] [Indexed: 12/17/2022]
Abstract
Bosch-Boonstra-Schaaf Optic Atrophy Syndrome (BBSOAS) is an autosomal dominant neurodevelopmental disorder caused by loss-of-function variants in NR2F1 and characterized by visual impairment, developmental delay, and intellectual disability. Here we report 18 new cases, provide additional clinical information for 9 previously reported individuals, and review an additional 27 published cases to present a total of 54 patients. Among these are 22 individuals with point mutations or in-frame deletions in the DNA-binding domain (DBD), and 32 individuals with other types of variants including whole-gene deletions, nonsense and frameshift variants, and point mutations outside the DBD. We corroborate previously described clinical characteristics including developmental delay, intellectual disability, autism spectrum disorder diagnoses/features thereof, cognitive/behavioral anomalies, hypotonia, feeding difficulties, abnormal brain MRI findings, and seizures. We also confirm a vision phenotype that includes optic nerve hypoplasia, optic atrophy, and cortical visual impairment. Additionally, we expand the vision phenotype to include alacrima and manifest latent nystagmus (fusional maldevelopment), and we broaden the behavioral phenotypic spectrum to include a love of music, an unusually good long-term memory, sleep difficulties, a high pain tolerance, and touch sensitivity. Furthermore, we provide additional evidence for genotype-phenotype correlations, specifically supporting a more severe phenotype associated with DBD variants.
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Affiliation(s)
- Megan E Rech
- Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, Texas, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - John M McCarthy
- Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, Texas, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Chun-An Chen
- Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, Texas, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Jane C Edmond
- Department of Ophthalmology, Dell Medical School, University of Texas at Austin, Austin, Texas, USA.,Division of Ophthalmology, Texas Children's Hospital, Houston, Texas, USA.,Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, USA
| | - Veeral S Shah
- Division of Ophthalmology, Texas Children's Hospital, Houston, Texas, USA.,Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, USA
| | - Daniëlle G M Bosch
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Gerard T Berry
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Linford Williams
- Children's Hospital of Pittsburgh of UPMC, Pittsburgh, Pennsylvania, USA
| | | | - Dmitriy Niyazov
- Department of Pediatrics, Ochsner Health System and University of Queensland, New Orleans, Louisiana, USA
| | - Charles Shaw-Smith
- Department of Clinical Genetics, Royal Devon and Exeter NHS Foundation Trust, Exeter, UK
| | - Erin M Kovar
- Section of Hematology and Oncology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
| | - Philip J Lupo
- Section of Hematology and Oncology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
| | - Christian P Schaaf
- Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, Texas, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA.,Heidelberg University, Institute of Human Genetics, Heidelberg, Germany
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