对CAR-scFv链接器变体的计算设计,用于增强对B细胞恶性瘤的CD20结合
Purva Khodke1, Bajarang Vasant Kumbhar1
1Department of Biological Sciences, Sunandan Divatia School of Science, SVKM's Narsee Monjee Institute of Management Studies (NMIMS) Deemed-to-be University, Vile Parle (West), Mumbai 400056, Maharashtra, India.
Computers in biology and medicine
|November 30, 2025
概括
惠特洛链接器通过提高结合亲和力和稳定性来增强抗CD20化学抗原受体 (CAR) -T细胞疗法. 这种分子建模方法为下一代CAR结构提供了一个有希望的策略,该结构针对B细胞恶性瘤中的CD20.
科学领域:
- 免疫治疗是一种免疫疗法.
- 分子建模分子建模
- 结构生物学 结构生物学
背景情况:
- 化学抗原受体 (CAR) -T细胞疗法在治疗血液恶性瘤方面表现有前途,但面临着抗原逃逸和有限的持久性等挑战.
- 目前的CAR-T疗法主要针对CD19和BCMA,因此需要扩展到CD20等其他抗原,以在B细胞恶性瘤中获得更广泛的疗效.
- CD20的近膜性质和短的细胞外表图形对CAR T细胞疗效提出了独特的结合挑战.
研究的目的:
- 通过分子建模,设计和评估针对CD20的新型CAR单链可变片段 (scFvs).
- 研究不同链接区域 (Whitlow和G4S3) 对CAR-scFvs与CD20的结合模式,稳定性和亲和性的影响.
- 为了确定最佳的CAR结构,用于增强抗CD20CAR-T细胞疗法.
主要方法:
- 使用Ofatumumab作为工程CAR-scFvs.框架的分子建模策略.
- 利用分子动力学 (MD) 模拟,自由能量景观分析和分子对接来评估结合相互作用和稳定性.
- 计算的结合能量来量化工程scFvs对CD20的亲和力.
主要成果:
- scFv-Whitlow构造展示了一个稳定的动态框架,具有灵活的VH和VL域,表明功能稳定性.
- 分子对接和MD模拟确定了CD20的细胞外循环2 (ECL2) 作为一个关键的相互作用部位.
- 具有约束力的能量计算显示,与scFv-G4S3 (-27.97 kcal/mol) 相比,scFv-Whitlow (-37.12 kcal/mol) 对CD20的亲和力明显更高.
结论:
- scFv-Whitlow连接器是开发有效的抗CD20CAR-T细胞疗法的有希望的候选者.
- 分子建模为下一代针对CD20的CAR结构的合理设计提供了宝贵的见解.
- 针对CD20的优化CAR-T细胞治疗可以扩大B细胞恶性瘤的治疗选择.
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