儿童炎症性肠病中由DNA甲基化引起的SLCO2A1减弱表达
Natsuki Ito1,2, Takahiro Kudo1, Hidetaka Eguchi2
1Department of Pediatrics and Adolescent Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan.
Inflammatory bowel diseases
|June 16, 2023
概括
在SLCO2A1基因中异构的变体可以通过局部DNA甲基化导致炎症性肠病 (IBD),从而减少前列腺素载体表达并引起炎症.
科学领域:
- 遗传学和表观遗传学
- 胃肠病学 胃肠病学
- 分子生物学分子生物学
背景情况:
- 该SLCO2A1基因编码了一个前列腺素载体.
- 自体逆性致病变体导致SLCO2A1相关的慢性肠病变.
- 异构性SLCO2A1变体在炎症性肠病 (IBD) 病原发生中的作用尚不清楚.
研究的目的:
- 研究SLCO2A1中局部表观遗传变化的作用,在患有异性致病变体的患者中.
- 探索SLCO2A1变体,表观遗传变化和IBD发展之间的联系.
主要方法:
- 整体外基因组测序确定了SLCO2A1中的异合拼接变体,该变体在两位怀疑具有单一性IBD的姐妹中存在.
- 双硫酸盐测序分析了肠道组织中的表观遗传变化.
- 评估了SLCO2A1表达 (mRNA和蛋白质) 和尿中的前列腺素代谢物水平.
主要成果:
- 在这两名患者中都发现了异性SLCO2A1变体 (c.940+1G>A).
- 在炎症性肠病变中观察到减弱的SLCO2A1表达和密集的促进物甲基化.
- 检测出尿中的前列腺素代谢物水平升高,与疾病严重程度相关.
结论:
- 局部DNA甲基化SLCO2A1可以减弱其表达,可能导致因未结合的前列腺素导致粘膜炎症.
- 这些发现揭示了导致IBD发展的表观遗传机制.
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