自闭症中 lncRNA,拼接和区域基因表达模式的全基因组变化
Neelroop N Parikshak1,2, Vivek Swarup1,2, T Grant Belgard1,2
1Center for Autism Research and Treatment and Program in Neurobehavioral Genetics, Semel Institute, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California 90095, USA.
Nature
|December 6, 2016
概括
在自闭症谱系障碍 (ASD) 中,遗传因素汇聚在共同的途径上. 这项研究揭示了非编码RNA的失调,改变了拼接,并减少了ASD大脑的区域基因表达差异.
科学领域:
- 神经科学
- 遗传学
- 分子生物学
背景情况:
- 自闭症谱系障碍 (ASD) 有显著的遗传基础,
- 自闭症的遗传异质性可能与共享的生物机制相聚.
- 了解这些融合途径对于确定治疗点至关重要.
研究的目的:
- 使用大量的死后脑样本队列研究非编码转录组,替代拼接和ASD中的分子调节剂.
- 确定ASD不同遗传原因的共同分子途径.
- 在ASD中探索与年龄相关的分子变化和区域基因表达模式.
主要方法:
- 对死后大脑样本进行全基因组转录分析.
- 分析非编码RNA,包括长非编码RNA (lncRNA).
- 研究大脑区域之间的替代拼接模式和基因表达差异.
- 共同表达网络分析以确定功能模块和与年龄相关的轨迹.
主要成果:
- 与ASD相关的灵长类特异性 lncRNAs 的失调.
- 降低神经元特异性的替代拼接的调节.
- 额叶和叶之间的正常基因表达差异减弱,可能涉及SOX5.
- 在特异性自闭症和染色体15q11.2-13.1重复综合征 (dup15q) 中共享的转录基因特征.
- 在ASD患者中微质和突触基因表达轨迹的年龄相关变化.
结论:
- 在自闭症的不同遗传因素可以汇聚在共同的分子路径.
- 非编码RNA,拼接和区域基因表达的改变有助于ASD病理生理学.
- 自闭症的遗传风险可能会影响微质和突触功能的发育轨迹.
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