Document details

X-linked intellectual disability related genes disrupted by balanced X-autosome translocations


Description

Made available in DSpace on 2022-04-29T07:26:31Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-12-01

Detailed molecular characterization of chromosomal rearrangements involving X-chromosome has been a key strategy in identifying X-linked intellectual disability-causing genes. We fine-mapped the breakpoints in four women with balanced X-autosome translocations and variable phenotypes, in order to investigate the corresponding genetic contribution to intellectual disability. We addressed the impact of the gene interruptions in transcription and discussed the consequences of their functional impairment in neurodevelopment. Three patients presented with cognitive impairment, reinforcing the association between the disrupted genes (TSPAN7-MRX58, KIAA2022-MRX98, and IL1RAPL1-MRX21/34) and intellectual disability. While gene expression analysis showed absence of TSPAN7 and KIAA2022 expression in the patients, the unexpected expression of IL1RAPL1 suggested a fusion transcript ZNF611-IL1RAPL1 under the control of the ZNF611 promoter, gene disrupted at the autosomal breakpoint. The X-chromosomal breakpoint definition in the fourth patient, a woman with normal intellectual abilities, revealed disruption of the ZDHHC15 gene (MRX91). The expression assays did not detect ZDHHC15 gene expression in the patient, thus questioning its involvement in intellectual disability. Revealing the disruption of an X-linked intellectual disability-related gene in patients with balanced X-autosome translocation is a useful tool for a better characterization of critical genes in neurodevelopment.

Department of Morphology and Genetics Genetics Division Universidade Federal de São Paulo

Jena University Hospital Friedrich Schiller University Institute of Human Genetics

Department of Psychobiology Universidade Federal de São Paulo

Departament of Genetics Instituto de Biocincias de Botucatu Universidade Estadual de São Paulo

Departament of Genetics Instituto de Biocincias de Botucatu Universidade Estadual de São Paulo

Document Type Journal article
Language English
facebook logo  linkedin logo  twitter logo 
mendeley logo

Related documents

No related documents