在细胞内部可靠地重新定位抗体相互作用体
Caitlin M O'Shea1, Rushba Shahzad1, Kimia Aghasoleimani1
1School of Life Sciences, University of Essex, Colchester, United Kingdom.
Nature communications
|January 31, 2026
概括
研究人员为细胞内应用设计了体内高度溶解的单链可变片段 (scFv). 这些工程化的体内细胞使细胞内的抗体相互作用的可靠重新定位成为可能.
科学领域:
- 生物技术是生物技术.
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 单克隆抗体与人体蛋白质组的85%相互作用,但由于细胞质透性差,经常在细胞内失败.
- 细胞内的可溶性和功能是基于抗体的细胞内应用的主要限制.
研究的目的:
- 为了设计高度可溶性和功能性的单链可变片段 (scFv),用于向细胞质蛋白质.
- 克服抗体透和细胞内活动的限制.
主要方法:
- 对抗体变量域的分析,以确定影响溶解度的因素,并将电荷确定为关键.
- 优化scFv构造,包括域间链接器和域导向.
- 应用人工智能引导的反向折叠来减少搜索空间和排名潜在的体内序列.
- 实验验证体内与标蛋白相互作用的实验验证.
主要成果:
- 确定电荷是影响scFv体内溶解性的主要因素.
- 开发了优化的scFv设计,提高了可溶性,丰度和稳定性.
- 产生了600多个体内序列,针对60个具有各种特异性的细胞质蛋白.
- 验证了与关键蛋白质的体内相互作用,包括p53,α-synuclein,SOD1,polyQ,FUS/TLS,UCHL1和GFP.
结论:
- 证明了对被测序的抗体互动体的可靠重定位,用于细胞内使用.
- 建立了一种创建可溶性和功能性体内的方法,针对各种细胞质蛋白.
- 开辟了基于细胞内抗体的治疗方法和研究工具的新途径.
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