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Guadagnolo D, Mastromoro G, Torres B, Marchionni E, di Palma F, Goldoni M, Cocciadiferro D, Novelli A, Bernardini L, Pizzuti A. Duplication at 19q13.32q13.33 Segregating with Neuropsychiatric Phenotype in a Three-Generation Family: Towards the Definition of a Critical Region. Genes (Basel) 2023; 14:2157. [PMID: 38136979 PMCID: PMC10742575 DOI: 10.3390/genes14122157] [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: 10/20/2023] [Revised: 11/16/2023] [Accepted: 11/27/2023] [Indexed: 12/24/2023] Open
Abstract
Chromosomal submicroscopic imbalances represent well-known causes of neurodevelopmental disorders. In some cases, these can cause specific autosomal dominant syndromes, with high-to-complete penetrance and de novo occurrence of the variant. In other cases, they result in non-syndromic neurodevelopmental disorders, often acting as moderate-penetrance risk factors, possibly inherited from unaffected parents. We describe a three-generation family with non-syndromic neuropsychiatric features segregating with a novel 19q13.32q13.33 microduplication. The propositus was a 28-month-old male ascertained for psychomotor delay, with no dysmorphic features or malformations. His mother had Attention-Deficit/Hyperactivity Disorder and a learning disability. The maternal uncle had an intellectual disability. Chromosomal microarray analysis identified a 969 kb 19q13.32q13.33 microduplication in the proband. The variant segregated in the mother, the uncle, and the maternal grandmother of the proband, who also presented neuropsychiatric disorders. Fragile-X Syndrome testing was negative. Exome Sequencing did not identify Pathogenic/Likely Pathogenic variants. Imbalances involving 19q13.32 and 19q13.33 are associated with neurodevelopmental delay. A review of the reported microduplications allowed to propose BICRA (MIM *605690) and KPTN (MIM *615620) as candidates for the neurodevelopmental delay susceptibility in 19q13.32q13.33 copy number gains. The peculiarities of this case are the small extension of the duplication, the three-generation segregation, and the full penetrance of the phenotype.
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Affiliation(s)
- Daniele Guadagnolo
- Department of Experimental Medicine, School of Medicine and Dentistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Gioia Mastromoro
- Department of Experimental Medicine, School of Medicine and Dentistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Barbara Torres
- Medical Genetics Unit, Department of Diagnosis, Treatment and Transfusional Medicine Services, Fondazione Casa Sollievo della Sofferenza, Istituto di Ricovero e Cura a Carattere Scientifico, 71013 San Giovanni Rotondo (FG), Italy
| | - Enrica Marchionni
- Department of Experimental Medicine, School of Medicine and Dentistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Francesca di Palma
- Department of Experimental Medicine, School of Medicine and Dentistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Marina Goldoni
- Medical Genetics Unit, Department of Diagnosis, Treatment and Transfusional Medicine Services, Fondazione Casa Sollievo della Sofferenza, Istituto di Ricovero e Cura a Carattere Scientifico, 71013 San Giovanni Rotondo (FG), Italy
| | - Dario Cocciadiferro
- Laboratory of Medical Genetics, Translational Cytogenomics Research Unit, Bambino Gesù Children Hospital, Istituto di Ricovero e Cura a Carattere Scientifico, 00165 Rome, Italy
| | - Antonio Novelli
- Laboratory of Medical Genetics, Translational Cytogenomics Research Unit, Bambino Gesù Children Hospital, Istituto di Ricovero e Cura a Carattere Scientifico, 00165 Rome, Italy
| | - Laura Bernardini
- Medical Genetics Unit, Department of Diagnosis, Treatment and Transfusional Medicine Services, Fondazione Casa Sollievo della Sofferenza, Istituto di Ricovero e Cura a Carattere Scientifico, 71013 San Giovanni Rotondo (FG), Italy
| | - Antonio Pizzuti
- Department of Experimental Medicine, School of Medicine and Dentistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Medical Genetics Unit, Department of Diagnosis, Treatment and Transfusional Medicine Services, Fondazione Casa Sollievo della Sofferenza, Istituto di Ricovero e Cura a Carattere Scientifico, 71013 San Giovanni Rotondo (FG), Italy
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Wang J, Jia C, Gao Q, Zhang J, Gu X. iASPP regulates neurite development by interacting with Spectrin proteins. Front Mol Neurosci 2023; 16:1154770. [PMID: 37284462 PMCID: PMC10240065 DOI: 10.3389/fnmol.2023.1154770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 04/24/2023] [Indexed: 06/08/2023] Open
Abstract
Introduction Since its discovery in 1999, a substantial body of research has shown that iASPP is highly expressed in various kinds of tumors, interacts with p53, and promotes cancer cell survival by antagonizing the apoptotic activity of p53. However, its role in neurodevelopment is still unknown. Methods We studied the role of iASPP in neuronal differentiation through different neuronal differentiation cellular models, combined with immunohistochemistry, RNA interference and gene overexpression, and studied the molecular mechanism involved in the regulation of neuronal development by iASPP through coimmunoprecipitation coupled with mass spectrometry (CoIP-MS) and coimmunoprecipitation (CoIP). Results In this study, we found that the expression of iASPP gradually decreased during neuronal development. iASPP silencing promotes neuronal differentiation, while its overexpression inhibited neurite differentiation in a variety of neuronal differentiation cellular models. iASPP associated with the cytoskeleton-related protein Sptan1 and dephosphorylated the serine residues in the last spectrin repeat domain of Sptan1 by recruiting PP1. The non-phosphorylated and phosphomimetic mutant form of Sptbn1 inhibited and promoted neuronal cell development respectively. Conclusion Overall, we demonstrate that iASPP suppressed neurite development by inhibiting phosphorylation of Sptbn1.
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Affiliation(s)
- Junhao Wang
- Fujian Key Laboratory for Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Chunhong Jia
- Department of Neonatology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Qiong Gao
- Fujian Key Laboratory for Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Jiwen Zhang
- Fujian Key Laboratory for Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Xi Gu
- Fujian Key Laboratory for Translational Research in Cancer and Neurodegenerative Diseases, Institute for Translational Medicine, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
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Feng YL, Li ND. Duplication of 19q (13.2-13.31) associated with comitant esotropia: A case report. World J Clin Cases 2021; 9:5526-5534. [PMID: 34307605 PMCID: PMC8281424 DOI: 10.12998/wjcc.v9.i20.5526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 12/23/2020] [Accepted: 03/11/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Comitant esotropia is the most common form of strabismus. It is caused by heterogeneous environmental and genetic risk factors. The pure duplication of the long arm of chromosome 19 is a rare abnormality. Only 8 patients with partial trisomy of the long arm of chromosome 19q have been reported to date. Here, we describe a girl with pure duplication of 19q, who was diagnosed with congenital esotropia, microcephaly, and gallbladder agenesis.
CASE SUMMARY The patient was diagnosed with esotropia when she was 1-year-old. The Krimsky method showed +50 prism diopters in the primary gaze position. No additional abnormal findings were observed following slit lamp and fundus examination, but the features of the full-field electroretinogram showed a decreased amplitude and increased implicit times. Magnetic resonance imaging showed ventriculomegaly with thinning of the corpus callosum and splenium in her brain. A 4.42 Mb mosaic duplication within 19q13.2-q13.31 region (chr19:39,343,725 to 43,762,586) was detected by microarray comparative genomic hybridization.
CONCLUSION Strabismus is reported in many live borns with pure duplication of 19q. This important clinical characteristic indicates that the candidate genes fundamental for this phenotype may be narrowed to genes within the 19q13.3-q13.31 region. There were two candidate genes observed that may contribute to the comitant esotropia phenotype, namely XRCC1 (19:43,543,311) and SMG9 (19:43,727,991).
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Affiliation(s)
- Yue-Lan Feng
- Department of Ophthalmology, National Center for Children's Health, Beijing Children’s Hospital, Capital Medical University, Beijing 100045, China
- Department of Ophthalmology, First Hospital Affiliated to Baotou Medical College, Baotou 014010, Inner Mongolia Autonomous Region, China
| | - Ning-Dong Li
- Department of Ophthalmology, National Center for Children's Health, Beijing Children’s Hospital, Capital Medical University, Beijing 100045, China
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