确定SLC35A1作为转导多血清组合复合腺相关病毒 (AAV) 载体的重要宿主因子
Xiujuan Zhang1, Siyuan Hao1, Zehua Feng2
1Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, Kansas, USA.
mBio
|November 27, 2024
概括
一个全基因组的屏幕确定了溶解物载体家族35成员A1 (SLC35A1) 对于腺相关病毒 (AAV) 转导至关重要. SLC35A1影响细胞内贩运和核进口,影响多个AAV血清型.
科学领域:
- 分子生物学分子生物学
- 病毒学 病毒学
- 基因治疗 基因治疗
背景情况:
- 腺相关病毒 (AAV) 载体对于治疗遗传疾病至关重要,但转导机制需要进一步阐明.
- 虽然G蛋白结合受体108 (GPR108) 影响大多数AAV血清型,但它在AAV5转导中的作用有限,需要识别替代宿主因素.
- 了解宿主-病原体相互作用是优化基因传递效率和安全性的关键.
研究的目的:
- 通过全基因组CRISPR/Cas9屏幕识别基因相关病毒血清型5 (AAV5) 转导所必需的宿主因素.
- 调查溶解物载体家族35个成员A1 (SLC35A1) 的作用,它是一种cytidine 5'-monophosphate-sialic acid (CMP-SIA) 载体,在AAV转导中.
- 探索SLC35A1对AAV载体在多种血清型中的细胞内贩运和核进口的影响.
主要方法:
- 在293个F细胞中进行了全基因组的CRISPR/Cas9选,这些F细胞被转化为复合AAV血清型5 (rAAV5).
- 对已识别的基因进行了淘汰研究,包括SLC35A1,KIAA0319L和TM9SF2,以评估它们对rAAV转导的影响.
- 使用各种AAV血清型 (rAAV2,rAAV3,rAAV5,rAAV9,rAAV11) 和突变的SLC35A1结构 (∆C尾巴,T128A) 进行机械研究.
主要成果:
- 绝杀SLC35A1显著降低了rAAV5转导,超过了之前报告的基因KIAA0319L和TM9SF2.2的影响.
- SLC35A1 缺乏改变了细胞表面化,但适度地影响了rAAV5 的结合和内部化,同时显著降低了载体核进口.
- SLC35A1的淘汰会对AAV血清型产生差异性影响,对rAAV2/3的转导减少,但对rAAV9/11增加,并通过其C端尾部严重损害了转导和核导入.
结论:
- 溶性载体家族35成员A1 (SLC35A1) 是一个关键宿主因子,对于有效的腺相关病毒 (AAV) 转导至关重要.
- SLC35A1在AAV载体的细胞内贩运和核进口中发挥着重要作用,超出了初始细胞附着的范围.
- SLC35A1的C端细胞质尾部对于其在AAV转导和核导入中的功能至关重要,突出了基因传递中的新机制.
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