作为对细胞应激的反应,SERPINA1 3'UTR中改变的多基化位点使用会影响A1AT蛋白表达
F N U Jiamutai1, Abigail Hatfield1, Austin Herbert1
1Department of Genetics and Biochemistry, Center for Human Genetics, Clemson University, Clemson, USA.
Scientific reports
|July 2, 2025
概括
炎症改变信使RNA (mRNA) 处理,导致更长的3'未翻译区域 (3'UTR). 这种SERPINA1mRNA的变化降低了α-1-抗素 (A1AT) 蛋白水平,影响了肝脏的健康.
科学领域:
- 分子生物学分子生物学
- 遗传学 遗传学是一种遗传学.
- 生物化学 生物化学
背景情况:
- 替代多基化产生多样化的信使RNA (mRNA) 3'异型,影响RNA的稳定性,局部化和翻译.
- SERPINA1基因编码α-1-抗素 (A1AT),这是一个关键的蛋白质,参与炎症和蛋白酶抑制,对肺部和肝脏疾病有影响.
- A1AT的失调与慢性阻塞性肺病和肝硬化有关.
研究的目的:
- 为了研究细胞应激,特别是介质素-6 (IL-6) 治疗对SERPINA1 mRNA的替代多基化的影响.
- 为了确定改变的多基化如何影响α-1-抗素 (A1AT) 蛋白质表达.
- 探索炎症在调节SERPINA1转录的3'端处理中的作用.
主要方法:
- 用IL-6,乙醇或过氧化物对待HepG2肝细胞以诱导细胞应激.
- 对SERPINA1 mRNA 3'末端处理和多基化动态的分析.
- 在不同压力条件下的α-1-抗素 (A1AT) 蛋白质表达量的量化.
主要成果:
- 干白素-6 (IL-6) 治疗上调了SERPINA1的转录,并诱导了替代的多基化,有利于更长的3'未翻译区域 (3'UTR) 异形.
- 发现SERPINA1mRNA的长3'UTR异型抑制了内源性α-1-抗素 (A1AT) 蛋白表达,尽管mRNA水平增加了.
- 乙醇和过氧化物处理没有显著影响SERPINA1的表达或其3'终端处理.
- 由IL-6诱导的变化表明内细胞网膜功能和分泌蛋白质处理的改变.
结论:
- 由IL-6触发的炎症直接影响SERPINA1转录的多基化位点选择.
- 在炎症期间,SERPINA1 mRNA的转向较长的3'UTR导致α-1-抗素 (A1AT) 蛋白质的产生减少.
- 这些发现突出了一个新的机制,通过炎症可以通过后转录调节调节蛋白质水平.
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