在T细胞上CD137 mAbs的成本刺激能力取决于复杂的CRD结构,而不是阻断连体受体结合
Xin Jin1, Ling Yi1, Xiaojue Wang1
1Department of Central Laboratory, Beijing Tuberculosis and Thoracic Tumour Research Institute, Beijing Chest Hospital, Capital Medical University, Beijing, China.
European journal of immunology
|September 7, 2023
概括
开发了新的CD137抗体,并对它们对T细胞的结合和共刺激作用进行了分析. 不同的结合区域影响T细胞激活,为下一代CD137抗体疗法提供了洞察力.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 生物技术是生物技术.
背景情况:
- CD137是CD8+ T细胞的关键辅助刺激受体,在免疫反应中至关重要.
- 现有的CD137抗体,如乌托米卢马布和乌雷卢马布,具有不同的临床辅助刺激能力.
- 与T细胞毒性平衡CD137介导的抗瘤作用仍然是一个临床挑战.
研究的目的:
- 描述一组新型抗人类CD137单克隆抗体 (mAbs) 的小组.
- 分析它们的亲缘关系,结合区域,交叉反应性和功能活动.
- 为开发下一代针对CD137的免疫疗法提供信息.
主要方法:
- 制备和描述特定的抗人类CD137 mAbs. 的特征.
- 亲缘关系,同型和CD137-CRD结合区域分析.
- 评估交叉活性,体受体结合抑制和T细胞共刺激活性.
主要成果:
- 抗人类CD137 mAbs显示出与 rhesus CD137.7的高交叉反应性.
- 根据对CRDI+CRDII,CRDIII或CRDIV+STP区域的结合,MAbs被分为三个组.
- 结合CRDIII的mAbs表现出强大的阻断活性;高度辅助刺激的mAbs增强了CD8+T细胞的增殖.
- 造价刺激能力与带结合抑制没有直接相关,这表明复杂的形状控制.
结论:
- 新型抗人类CD137 mAbs表现出不同的结合特征和功能活动.
- 结合区域和形状结构显著影响CD137介导的T细胞共刺激.
- 这些发现为设计改进的CD137抗体疗法提供了宝贵的数据.
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