相关实验视频
Updated: May 26, 2025

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Separation of Mouse Embryonic Facial Ectoderm and Mesenchyme
Published on: April 12, 2013
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在 orofacial 裂病因学的遗传-表观遗传相互作用 (meQTLs)
L A Machado-Paula1, J Romanowska2, R T Lie2
1University of Iowa College of Dentistry and Dental Clinics, Iowa City, IA, USA.
medRxiv : the preprint server for health sciences
|February 24, 2025
概括
这项研究表明,遗传变异通过改变DNA甲基化模式来影响面腔裂 (OFCs) 风险. 这些表观遗传变化影响基因表达,有助于解释OFC中缺失的遗传性和可变表达性.
科学领域:
- 遗传学 是一个遗传学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 发展生物学 发展生物学
背景情况:
- 非综合征性口腔裂 (OFCs) 具有复杂的病因,涉及遗传和环境因素,已知的风险位置只解释了一小部分风险.
- 表观遗传机制,特别是差异性DNA甲基化 (DNAm),与OFC风险有关,可能会改变透率并影响不同的裂类型.
- DNAm是甲基组添加到细胞因子的,可以受到环境因素和遗传变异的影响 (甲基化定量位置 - meQTLs),改变基因表达.
研究的目的:
- 调查异常DNA甲基化及其导致的基因表达改变在OFCs病因中的作用.
- 为了确定与OFC风险相关的常见遗传变异是否通过影响DNA甲基化模式来发挥其作用.
主要方法:
- 从10个裂关联SNP的基因型数据和全基因组DNA甲基化数据 (Illumina 450K阵列) 分析了409个OFC病例和456个对照.
- 识别的裂关联meQTLs在362个裂不一致的兄弟对的独立队列中得到复制.
- 甲基化特定的qPCR和MatrixeQTL用于SNP-CpG对之间的相互作用分析,并对T测试评估了兄弟对中的DNA甲基化差异.
主要成果:
- 复制了9个meQTL,显示了特定SNP和CpG位点之间的显著相互作用,包括rs987525 (8q24) 和cg16561172 (MYC) (P=0.00000963).
- 在cg06873343 (TTYH3) (P=0.04),cg17103269 (LPIN3) (P=0.002) 和cg19191560 (LGR4) (P=0.05) 的兄弟姐妹之间观察到显著的DNA甲基化差异.
结论:
- 这些发现支持了在GWAS中发现的常见非编码变体通过像DNAm.DNA这样的表观遗传机制影响OFC风险的假设.
- 这些表观遗传修饰可以调节基因表达,这可能解释了理解OFCs遗传性,透率降低和可变表达性的差距.
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