通过双重共传导扩展AAV包装货物:在低载体剂量下高效的蛋白质转剪切
Mariana V Ferreira1,2, Sofia Fernandes1,2, Ana Isabel Almeida1,2
1iBET-Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901 Oeiras, Portugal.
International journal of molecular sciences
|July 14, 2023
概括
新的分裂-intins,Cfa和Gp41-1,显著提高双腺相关病毒 (AAV) 载体基因传递效率. 更高质量的载体制剂进一步提高了这些蛋白质的转接率,使得更大的基因传递成为可能.
科学领域:
- 分子生物学分子生物学
- 基因治疗 基因治疗
- 生物技术是生物技术.
背景情况:
- 腺相关病毒 (AAV) 载体是关键的基因传递工具,但有限的包装能力阻碍了大型治疗基因的传递.
- 采用蛋白质转链拼接的双AAV系统,如Npu DnaE分裂整合,旨在克服包装限制,但面临效率挑战.
- 现有的分裂-inteins的复制效率不足,需要更高的载体剂量,影响治疗应用.
研究的目的:
- 为了评估Cfa和Gp41-1分裂-inteins与Npu DnaE对双AAV载体蛋白转接合的性能.
- 评估载体准备质量对体外分体内性能的影响.
- 为了证明降低载体剂量的潜力,改进了用于大基因传递的分裂整体策略.
主要方法:
- 过渡性转移和体外共同转移被用来比较Npu DnaE,Cfa和Gp41-1分裂.
- 采用双AAV向量系统来评估蛋白质复制和转接拼接效率.
- 系统评估了载体准备质量 (完整颗粒的百分比) 对分离内置性能的影响.
主要成果:
- 与Npu DnaE相比,Cfa和Gp41-1分裂蛋白显示了超过两倍的复制率,实现了100%的蛋白质复制.
- 高质量的向量制剂 (60-75%的全颗粒) 增强了与低质量的制剂 (20-30%) 相比的三倍的分裂性能.
- 发现低质量的载体制剂可以抑制协同转导,限制分裂基因复合效率.
结论:
- 在双AAV矢量应用中,Cfa和Gp41-1代表了优异的分裂-内因,显著提高了蛋白质转接合效率.
- 优化矢量准备质量对于最大限度地提高分离整合性能和克服协同传导抑制至关重要.
- 通过将增强的分离内因与高质量的载体制剂相结合,可以减少载体剂量,并通过双AAV系统促进更大的治疗基因的输送.
相关概念视频
Amplifying Signals via Second Messengers
6.1K
Many receptor binding ligands are hydrophilic; they do not cross the cell membrane but bind to cell-surface receptors. Thus, their message must be relayed by second messengers present in the cell cytoplasm. There are several second messenger pathways, each with its own way of relaying information. For example, the G protein-coupled receptors can activate both phosphoinositol and cyclic AMP (cAMP) second messenger pathways. The phosphoinositol pathway is active when the receptor induces...
6.1K
Transduction
3.0K
Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome...
3.0K


