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为增强线性RNA表达增强背接类似的工程站点
Xialing Chen1, Sufei Sun1, Kaimeng Li2
1School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, 215123, China.
Applied microbiology and biotechnology
|October 16, 2025
概括
将外源基因引入细胞可以形成圆形RNA (circRNA) 或线性RNA. 修改这些基因的背部拼接样 (BSL) 位点可以增强基因的表达,从而提供一种新的基因表达系统.
科学领域:
- 分子生物学分子生物学
- 在RNA生物学,RNA生物学.
- 基因表达 基因表达
背景情况:
- 循环RNA (circRNA) 和从前RNA形成线性RNA是一个由RNA序列,调节元件和RNA结合蛋白影响的竞争过程.
- 培养细胞中的外源基因表达涉及复杂的拼接机制.
研究的目的:
- 研究不同细胞系中的外源性光酶 (Luc) 基因形成circRNA的过程.
- 分析背部拼接样 (BSL) 位点在Luc衍生的circRNAs的形成和表达中的作用.
- 探索调节BSL遗址的潜力,以开发高效的基因表达系统.
主要方法:
- 在HepG2,BmN和CIK细胞中引入了露西法酶 (Luc) 表达载体和体外转录的LucRNA.
- 使用逆转录聚合酶链反应 (RTPCR),桑格测序和逆转录滚动圆放大.
- 对BSL位点的突变分析及其对RNA表达和光酶活性影响的评估.
- 抑制与circRNA形成相关的蛋白质基因.
主要成果:
- 在多个细胞系中成功形成并检测到Luc衍生的circRNAs.
- 在Luc-circRNA中确定了BSL位点,与正规拼接位点不同.
- 在BSL位点的突变显著降低了circRNA表达,同时增加了线性Luc mRNA水平和光酶活性.
- 具有BSL位点突变的重组baculoviruses显示 circRNA形成减少和RNA表达增加.
- 沉默参与circRNA形成的关键蛋白质基因降低了circRNA效率并增加了Luc表达.
结论:
- 引入培养细胞的外源基因可以经历拼接,形成circRNAs.
- 修改外源基因中的BSL位点可以增强它们的表达,提供一种新的调节机制.
- 对BSL遗址的监管为开发高效和有针对性的基因表达系统提供了一个有希望的战略.
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