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在腺相关病毒系的进化过程中剖析积极选择事件和免疫驱动

Lirong Li¹, Runkuan Qin¹, Yunbo Liu¹

¹Department of Cardiology and Laboratory of Gene Therapy for Heart Diseases, State Key Laboratory of Biotherapy, and Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China.

|June 17, 2024

概括

腺相关病毒 (AAV) 的进化是由宿主免疫驱动的. 在AAV2囊体中的Site 548突变有助于逃避中和抗体,影响基因治疗载体的发展.

科学领域:

* 病毒学病毒学
* 进化生物学进化生物学
* 免疫学免疫学

背景情况:

* 腺相关病毒 (AAV) 血清型是人类基因治疗中的关键载体.
* AAV的进化机制和宿主相互作用仍然不太清楚.
*已知遗传重组会影响AAV变种多样性.

研究的目的:

* 分析塑造AAV囊基因多样化的进化驱动力.
* 调查AAV血统中积极选择的地点的功能相关性.
*阐明特定的AAV2囊位在宿主相互作用和免疫逃避中的作用.

主要方法:

*对天然AAV囊基因进行系统进化分析.
* 在AAV结构上确定和定位积极选择的地点.
*生物实验,以调查AAV2囊部位410和548的选择驱动.

主要成果:

*在AAV系中确定了具有功能相关性的积极选择的地点.
* AAV2囊进化的410位点没有得到人类CD4+T细胞反应选择的支持.
* AAV2囊进化的548位点与宿主幽默免疫和免疫逃避中和抗体有关.

结论:

* AAV进化受到宿主幽默免疫的显著影响,特别是在548位点.
* 548位点的突变影响了AAV变种对人类中和抗体的逃避.
*了解自然宿主中的AAV进化为改进基因疗法载体设计提供了洞察力.

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