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转位蛋白 (TSPO) 定子发射断层扫描成像和表达在脑转移患者
Paolo Zanotti-Fregonara1, Monika Vishnoi2,3,4, Quentin Finn5
1Department of Neurology, Houston Methodist Research Institute, 6670 Bertner Ave. Houston, Houston, TX, 77030, USA. paolo.zanottif@gmail.com.
概括
这项研究成功量化了18kDa转位蛋白 (TSPO) 在大脑转移中的表达,使用全动态正子发射断层扫描 (PET) 建模. 结果显示,11C-ER176结合是特定的,不受血脑屏障破坏的影响.
科学领域:
- 神经成像是一种神经成像.
- 在瘤学瘤学.
- 分子成像学分子成像学
背景情况:
- 18kDa转位蛋白 (TSPO) 是炎症状况的一个关键生物标志物.
- 全动态正子发射断层扫描 (PET) 建模很少用于脑瘤,并且尚未应用于脑转移 (BMs).
研究的目的:
- 用完整的动力建模来量化BM中TSPO表达的量化.
- 评估BMs中的11C-ER176结合的特异性.
- 评估血脑屏障 (BBB) 完整性对运动模型的影响.
主要方法:
- 九名患有骨髓瘤的患者和12名健康志愿者 (HVs) 接受了PET扫描,使用11C-ER176.
- 总分布体积 (VT) 是使用双组织区模型 (2TCM) 计算的.
- 使用免疫组织化学 (IHC) 和单细胞RNAseq.q.来验证TSPO表达.
主要成果:
- 与大脑其余部分相比,BMs中的11C-ER176吸收显著增加.
- 2TCM为BM时间活动曲线 (VT范围为3.2-13毫升/厘米3) 提供了精确的匹配.
- 血脑屏障完整性 (K1) 在BM和逆侧半球之间没有显著差异;TSPO表达在体外得到证实.
结论:
- 全动态建模准确量化了BMs中的TSPO表达.
- 在BM中11C-ER176的结合在很大程度上是特定的.
- 动力建模参数表明,BBB中断对BM中TSPO量化的影响最小.
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