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Manoubi W, Mahdouani M, Hmida D, Kdissa A, Rouissi A, Turki I, Gueddiche N, Soyah N, Saad A, Bouwkamp C, Elgersma Y, Mougou-Zerelli S, Gribaa M. Genetic investigation of the ubiquitin-protein ligase E3A gene as putative target in Angelman syndrome. World J Clin Cases 2024; 12:503-516. [PMID: 38322471 PMCID: PMC10841941 DOI: 10.12998/wjcc.v12.i3.503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/12/2023] [Accepted: 01/04/2024] [Indexed: 01/18/2024] Open
Abstract
BACKGROUND Angelman syndrome (AS) is caused by maternal chromosomal deletions, imprinting defects, paternal uniparental disomy involving chromosome 15 and the ubiquitin-protein ligase UBE3A gene mutations. However the genetic basis remains unclear for several patients. AIM To investigate the involvement of UBE3A gene in AS and identifying new potential genes using exome sequencing. METHODS We established a cohort study in 50 patients referred to Farhat Hached University Hospital between 2006 and 2021, with a strong suspicion of AS and absence of chromosomal aberrations. The UBE3A gene was screened for mutation detection. Two unrelated patients issued from consanguineous families were subjected to exome analysis. RESULTS We describe seven UBE3A variants among them 3 none previously described including intronic variants c.2220+14T>C (intron14), c.2507+43T>A (Exon15) and insertion in Exon7: c.30-47_30-46. The exome sequencing revealed 22 potential genes that could be involved in AS-like syndromes that should be investigated further. CONCLUSION Screening for UBE3A mutations in AS patients has been proven to be useful to confirm the diagnosis. Our exome findings could rise to new potential alternative target genes for genetic counseling.
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Affiliation(s)
- Wiem Manoubi
- Laboratory of Human Cytogenetics, Molecular Genetics and Reproductive Biology, Farhat Hached University Hospital, Sousse 4000, Tunisia
- Higher Institute of Biotechnology of Monastir, University of Monastir, Monastir 3000, Tunisia
| | - Marwa Mahdouani
- Laboratory of Human Cytogenetics, Molecular Genetics and Reproductive Biology, Farhat Hached University Hospital, Sousse 4000, Tunisia
- Higher Institute of Biotechnology of Monastir, University of Monastir, Monastir 3000, Tunisia
| | - Dorra Hmida
- Laboratory of Human Cytogenetics, Molecular Genetics and Reproductive Biology, Farhat Hached University Hospital, Sousse 4000, Tunisia
| | - Ameni Kdissa
- Laboratory of Human Cytogenetics, Molecular Genetics and Reproductive Biology, Farhat Hached University Hospital, Sousse 4000, Tunisia
| | - Aida Rouissi
- Department of Neuropediatry, La Rabta Hospital, Tunis 2000, Tunisia
| | - Ilhem Turki
- Department of Neuropediatry, La Rabta Hospital, Tunis 2000, Tunisia
| | - Neji Gueddiche
- Department of Pediatric, Fattouma Bourguiba Hospital Monastir, Monastir 2003, Tunisia
| | - Najla Soyah
- Department of Pediatric, Farhat Hached University Hospital, Sousse 4000, Tunisia
| | - Ali Saad
- Laboratory of Human Cytogenetics, Molecular Genetics and Reproductive Biology, Farhat Hached University Hospital, Sousse 4000, Tunisia
| | - Christian Bouwkamp
- Department of Neuroscience, Erasmus MC, the Netherlands, Rotterdam 3112 td, Netherlands
| | - Ype Elgersma
- Department of Neuroscience, Erasmus MC, the Netherlands, Rotterdam 3112 td, Netherlands
| | - Soumaya Mougou-Zerelli
- Laboratory of Human Cytogenetics, Molecular Genetics and Reproductive Biology, Farhat Hached University Hospital, Sousse 4000, Tunisia
| | - Moez Gribaa
- Laboratory of Human Cytogenetics, Molecular Genetics and Reproductive Biology, Farhat Hached University Hospital, Sousse 4000, Tunisia
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