开发和描述一种瘤性人类腺病毒基载体,同时表达腺病毒死亡蛋白和p14融合相关的小跨膜融合蛋白
Kathy L Poulin1, Ryan G Clarkin1,2,3, Joshua Del Papa1,2,3
1Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada.
International journal of molecular sciences
|November 27, 2024
概括
在型腺病毒中与p14融合相关的小跨膜蛋白 (FAST) 共同表达腺病毒死亡蛋白 (ADP) 并没有提高疗效. 从P2A结构中减少两种蛋白质的表达,损害了病毒的传播和癌细胞的死亡.
科学领域:
- 瘤治疗性病毒疗法
- 分子和细胞生物学分子和细胞生物学
背景情况:
- 基于人类腺病毒 (HAdV) 的结体载体由于瘤分布不佳而表现出有限的疗效.
- 之前的研究表明,p14 FAST蛋白表达增强了性HAdV疗效.
研究的目的:
- 为了调查与p14 FAST蛋白共同表达腺病毒死亡蛋白 (ADP) 是否能协同增强瘤感染载体的疗效.
- 评估在HAdV载体中共同表达p14FAST和ADP的方法.
主要方法:
- 在E3删除中构建了一个瘤性HAdV载体,p14 FAST和ADP表达盒被P2A自我切割分离.
- 在A549腺癌细胞中评估了蛋白质表达水平,细胞融合,载体传播和细胞杀死活性.
主要成果:
- 与单基因载体相比,通过P2A对p14 FAST和ADP的同时表达导致蛋白质量减少约10倍.
- 减少p14 FAST和ADP的表达导致细胞细胞融合,载体传播和瘤学活性在体外减少.
- 虽然P2A策略允许共同表达,但在维持适当的转基因表达方面存在挑战.
结论:
- 使用P2A的p14FAST蛋白与ADP的同时表达并没有改善性腺病毒的疗效.
- 在设计多基因色载体时,维持足够的转基因表达水平存在挑战.
- 进一步优化矢量设计是必要的,以克服表达限制和增强治疗潜力.
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