89Zr-免疫PET用于特定检测EMP2-阳性瘤
Ann M Chan1,2, Tove Olafsen3,4, Jessica Tsui1
1Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California.
Molecular cancer therapeutics
|February 28, 2024
概括
表皮膜蛋白-2 (EMP2) 向单克隆抗体 (mAbs) 在临床前模型中显示出有前途的瘤吸收. 这项研究开发了一种可追踪EMP2-阳性瘤的成像剂,证明了EMP2-依赖性积累和图像引导治疗的潜力.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 放射化学 放射化学是指辐射化学.
背景情况:
- 表皮膜蛋白-2 (EMP2) 在各种癌症中被上调,这使得它成为基于抗体的治疗的潜在目标.
- 了解抗EMP2单克隆抗体 (mAbs) 的瘤吸收和生物分布对于开发向治疗至关重要.
研究的目的:
- 在临床前癌症模型中使用抗EMP2 mAb与正子发射断层扫描 (PET) 来评估图像引导治疗.
- 评估抗EMP2 mAb及其放射性标记成像剂的瘤吸收,非目标积累和治疗疗效.
主要方法:
- 通过将抗EMP2 mAb与DFO相结合并用89Zr进行放射性标记,开发了一种成像剂.
- 评估了PET成像,瘤向和组织生物分布在不同EMP2表达水平的合成和人类瘤异种移植模型中.
- 评估了抗EMP2mAb在高和低表达瘤中的治疗疗效.
主要成果:
- PET成像显示,EMP2阳性瘤在24小时内放射性积累,持续5天.
- 在高EMP2表达的瘤中观察到高的特定吸收率,在低表达的瘤中吸收率较低.
- 抗EMP2 mAb通过降低高EMP2表达瘤的瘤负载 (4T1,HEC-1-A) 证明了治疗效果.
结论:
- 在临床前模型中,抗EMP2mAbs表现出EMP2依赖的瘤吸收与最小的目标外积累.
- 开发的89Zr标记的抗EMP2mAb是一种可行的成像剂,用于跟踪EMP2阳性瘤.
- 对抗EMP2抗体碎片的进一步开发可以加强对EMP2阳性癌症的跟踪和治疗干预.
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