Retinoblastoma and mental retardation microdeletion syndrome: clinical characterization and molecular dissection using array CGH
| 详细信息 | 推荐本文 | |
- 作者：R. Caselli ; C. Speciale ; C. Pescucci ; V. Uliana ; K. Sampieri ; M. Bruttini ; I. Longo ; S. De Francesco ; T. Pramparo and O. Zuffardi ; et al.
- 关键词：13q14 deletion syndrome ; Developmental delay ; Mental retardation ; Retinoblastoma ; Array ; CGH
- 刊名：Journal of Human Genetics
- 出版时间：June, 2007
- 出版年：2007
- 期刊代码：135_1434-5161
- 类别：bio
- 卷：52
- 期：6
- 页码：535-542
- 数据来源：sp
摘要
We describe three patients with retinoblastoma, dysmorphic features and developmental delay. Patients 1 and 2 have high and broad forehead, deeply grooved philtrum, thick anteverted lobes and thick helix. Patient 1 also has dolicocephaly, sacral pit/dimple and toe crowding; patient 2 shows intrauterine growth retardation and short fifth toe. Both patients have partial agenesis of corpus callosum. Patient 3 has growth retardation, microcephaly, thick lower lip and micrognathia. Using array-comparative genomic hybridization (CGH), we identified a 13q14 de novo deletion in patients 1 and 2, while patient 3 had a 7q11.21 maternally inherited deletion, probably not related to the disease. Our results confirm that a distinct facial phenotype is related to a 13q14 deletion. Patients with retinoblastoma and malformations without a peculiar facial phenotype may have a different deletion syndrome or a casual association of mental retardation and retinoblastoma. Using array-CGH, we defined a critical region for mental retardation and dysmorphic features. We compared this deletion with a smaller one in a patient with retinoblastoma (case 4) and identified two distinct critical regions, containing 30 genes. Four genes appear to be good functional candidates for the neurological phenotype: NUFIP1 (nuclear fragile X mental retardation protein 1), HTR2A (serotonin receptor 2A), PCDH8 (prothocaderin 8) and PCDH17 (prothocaderin 17).