对于近端MUC16ectodomain的抗体识别的结构基础
Kwangkook Lee1,2, Kay Perry3, Mengyao Xu2
1Division of Hematology & Oncology, Department of Medicine, Massachusetts General Hospital-Harvard Medical School, Boston, MA, USA.
Journal of ovarian research
|February 19, 2024
概括
一种针对 Mucin 16 (MUC16) 的新型人性化抗体显示出治疗潜力. 结构分析揭示了它的结合性表位,为改进的癌症疗法铺平了道路,超出了CA125向.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 免疫学 免疫学 免疫学
背景情况:
- 素16 (MUC16) 的过度表达与癌症的进展,转移和治疗耐药性有关,特别是在高度血清性卵巢癌中.
- MUC16裂变产生的循环碎片 (包括CA125) 和一个膜结合的成分,对瘤行为至关重要.
- 一个针对MUC16近端ectodomain的人性化抗体提供了一个潜在的治疗策略,具有降低的抗原潜力.
研究的目的:
- 为了研究针对MUC16 C-终端区域的人性化抗体的治疗多功能性.
- 阐明抗体-MUC16ectodomain相互作用的结构基础.
- 为设计新型MUC16向治疗剂提供信息.
主要方法:
- 结晶学被用来确定单独的4H11-scFv抗体片段的结构,以及与MUC16片段复合的结构.
- 在2.36 Å和2.47 Å分辨率下进行结构分析.
- 详细检查抗体-表皮质接口和抗体VH-VL相互作用.
主要成果:
- 晶体结构揭示了4H11-scFv与MUC16表位的结合,其中包括两个连续的β转和β毛.
- 相互作用由键稳定,VH-VL接口由键和-π相互作用维持.
- 在单克隆抗体,抗体-药物结合体和仿真抗原受体应用中证明了抗体的潜力.
结论:
- 这项研究为抗体与MUC16ectodomain之间的分子相互作用提供了关键的见解.
- 这些发现推动了针对MUC16的治疗剂的设计.
- 与现有的抗CA125抗体相比,开发的抗体有可能改善治疗特性.
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