13q13.3 microdeletion associated with apparently balanced translocation of 46,XX,t(7;13) suggests NBEA involvement
| Autor: | Akihiko Ishiyama, Ken Inoue, Eiji Nakagawa, Masayuki Sasaki, Yuichi Goto, Kenji Kurosawa, Masaki Miura |
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| Rok vydání: | 2020 |
| Předmět: |
Chromosome Disorders
Nerve Tissue Proteins Chromosomal translocation Biology Translocation Genetic Craniofacial Abnormalities 03 medical and health sciences 0302 clinical medicine Neurodevelopmental disorder Developmental Neuroscience Intellectual Disability Intellectual disability medicine Humans In Situ Hybridization Fluorescence Genetics Chromosomes Human Pair 13 medicine.diagnostic_test Karyotype General Medicine medicine.disease Phenotype Palpebral fissure Neurodevelopmental Disorders Child Preschool Pediatrics Perinatology and Child Health Female Neurology (clinical) Chromosome Deletion Psychomotor Disorders Carrier Proteins 030217 neurology & neurosurgery Fluorescence in situ hybridization Comparative genomic hybridization |
| Zdroj: | Brain and Development. 42:581-586 |
| ISSN: | 0387-7604 |
| DOI: | 10.1016/j.braindev.2020.05.006 |
| Popis: | Background Deletion of 13q13.3 is an extremely rare event. Case We report on a 25-month-old girl with neurodevelopmental disorder and intellectual disability. She had dysmorphic facies characterized by synophrys, long and narrow palpebral fissures; and a large, round face with small organs such as the eyes and mouth positioned near the center. She was hypotonic and had autism-like behaviors. Blood tests and brain MRI revealed no specific findings. However, G-banding chromosome analysis showed an apparently balanced translocation: 46,XX,t(7,13)(q11.23;q12.3). Both parents had normal karyotypes. Furthermore, her abnormal phenotype and chromosomal breakpoint lesion were suspected to be associated. Hence, we conducted array comparative genomic hybridization, which revealed a 3.2 Mb novel pathological microdeletion at 13q13.3 involving 17 genes including neurobeachin (NBEA), a neurodevelopment disorder gene. Furthermore, fluorescence in situ hybridization using probes adjacent to the microdeletion suggested a concomitant occurrence of the deletion and translocation as the structural basis of this rare genomic variant. Conclusion NBEA may have roles in her neurodevelopmental phenotypes, whereas other genes within the 13q13.3 microdeletion may contribute to her dysmorphic features. |
| Databáze: | OpenAIRE |
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