國家衛生研究院 NHRI:Item 3990099045/5865
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    題名: Clinical and molecular characterization of a transmitted reciprocal translocation t(1;12)(p32.1;q21.3) in a family co-segregating with mental retardation, language delay, and microcephaly
    作者: Liao, HM;Fang, JS;Chen, YJ;Wu, KL;Lee, KF;Chen, CH
    貢獻者: Division of Mental Health and Addiction Medicine
    摘要: Background: Chromosome translocation associated with neurodevelopmental disorders provides an opportunity to identify new disease-associated genes and gain new insight into their function. During chromosome analysis, we identified a reciprocal translocation between chromosomes 1p and 12q, t(1; 12)(p32.1; q21.3), co-segregating with microcephaly, language delay, and severe psychomotor retardation in a mother and her two affected boys. Methods: Fluorescence in situ hybridization (FISH), long-range PCR, and direct sequencing were used to map the breakpoints on chromosomes 1p and 12q. A reporter gene assay was conducted in human neuroblastoma (SKNSH) and Chinese hamster ovary (CHO) cell lines to assess the functional implication of the fusion sequences between chromosomes 12 and 1. Results: We determined both breakpoints at the nucleotide level. Neither breakpoint disrupted any known gene directly. The breakpoint on chromosome 1p was located amid a gene-poor region of similar to 1.1 Mb, while the breakpoint on chromosome 12q was located similar to 3.4 kb downstream of the ALX1 gene, a homeobox gene. In the reporter gene assay, we discovered that the fusion sequences construct between chromosomes 12 and 1 had a similar to 1.5 to 2-fold increased reporter gene activity compared with the corresponding normal chromosome 12 sequences construct. Conclusion: Our findings imply that the translocation may enhance the expression of the ALX1 gene via the position effect and result in the clinical symptoms of this family. Our findings may also expand the clinical phenotype spectrum of ALX1-related human diseases as loss of the ALX1 function was recently reported to result in abnormal craniofacial development.
    日期: 2011-05
    關聯: BMC Medical Genetics. 2011 May;12:Article Number: 70.
    Link to: http://dx.doi.org/10.1186/1471-2350-12-70
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000292152700001
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=79956219244
    顯示於類別:[陳嘉祥(2009-2013)] 期刊論文

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