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学术预告:Molecular Genetic Testing and the Future of Clinical Genetic Diagnosis for Rare Diseases

发布日期:2017-04-11 发表者: 浏览次数:962次

报告题目:Molecular Genetic Testing and the Future of Clinical Genetic Diagnosis for Rare Diseases

报告人: 周岩 博士(牛津大学Weatherall 分子医学研究所)

报告时间:2017年421日(周五)9:00-10:00

报告地点:逸夫楼C314会议室

摘要:

Craniosynostosis, the premature fusion of the cranial sutures, is a serious disorder with a prevalence of 1 in 2,000-2,500. Genetic causes are associated with an increased frequency of complications, often leading to long-term health problems. Despite recent successes in identifying new genetic causes, a significant proportion of patients (~60% of individuals analysed by exome or whole genome sequencing) remain undiagnosed. One potential explanation is that some causative variants lie in non-coding DNA, in regions not routinely analysed in NGS data.

Active regulatory elements are identified by looking at genome-wide enrichments of histone K27ac and K4me1 (enhancer) or K4me3 (promoter), using ChIP-Seq approach in human and murine embryonic suture materials. In addition, ATAC and DNase-Seq are also applied on suture-derived cells, to query the location of open chromatin as well as the binding of transcription factors over the regulatory elements. Targeted resequencing and whole genome sequencing are used to profile alternations of DNA sequences in undiagnosed patient cohort. Possible causative variants are subsequently denoted by superimposing locations of regulatory elements over the list of sequence variants. These genetics discoveries can then be understood by integrating the information with multiple approaches from chromatin higher-order structures study, cell and development biology and mouse genetics.

This research will lead to a better understanding of craniosynostosis and cranial suture development. It would also provide a clearer prognosis for patients and families and end their journey of diagnosis which may have lasted for years or decades.

报告人简介:

周岩,男,2012年毕业于英国格拉斯哥大学,获分子病理学博士学位。现为牛津大学Weatherall 分子医学研究所临床遗传学科学家,主要从事分子遗传学检测与罕见病的临床遗传诊断工作。