m6A-mRNA阅读器YTHDF2被确定为自闭症的潜在风险基因,具有不成比例的大脑衰竭
Sierra S Nishizaki1,2,3,4, Nicholas K Haghani1,4,5, Gabriana N La1,4,5
1Genome Center, University of California, Davis, CA, USA.
概括
研究人员确定了154个候选基因,用于患有不成比例大脑病 (ASD-DM) 的自闭症个体,这是一种与智力障碍相关的疾病. 这些发现突出了m6A-RNA修饰途径.
科学领域:
- 遗传学 遗传学 是一个
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
背景情况:
- 自闭症谱系障碍 (ASD) 是一种神经发育状况,具有多样化的遗传基础.
- 一部分自闭症个体在3岁时表现出不成比例的大脑 (ASD-DM),通常与智力障碍和较差的长期结果有关.
- 导致ASD-DM的遗传因素在很大程度上仍未确定,阻碍了针对性的干预.
研究的目的:
- 为了确定与ASD-DM相关的新型候选基因.
- 为了阐明这种严重自闭症亚表型的遗传病因.
- 探索潜在的分子机制,包括RNA修饰途径.
主要方法:
- 扩大了ASD-DM个体的队列,从自闭症现象项目和西蒙斯简单系列的766名试验者.
- 进行了全外因子测序,并分析了新的蛋白质影响变体.
- 利用功能网络分析和斑马鱼模型来研究候选基因功能 (例如,YTHDF2,YTHDC1).
主要成果:
- 确定了154个候选ASD-DM基因,包括14个高自信自闭症基因和7个先前与DM相关的基因.
- 五个基因 (例如CHD8,PTEN) 与自闭症和DM有关.
- 斑马鱼的功能性研究表明m6A-RNA读者YTHDF2参与调节头部/大脑大小和脆弱X相关基因表达,这表明它在自闭症表型中发挥了作用. 在YTHDC1中也发现了一个变体.
结论:
- 这项研究显著扩大了ASD-DM候选基因列表,提供了更全面的遗传景观.
- 这些发现表明m6A-RNA修饰途径是严重自闭症与大脑衰竭病理生理学的潜在贡献者.
- 对这些基因和通路的进一步研究可能会揭示ASD-DM的新型治疗点.
相关概念视频
02:18Alternative RNA Splicing
20.9K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
20.9K
02:41Lethal Alleles
14.6K
Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
14.6K