18F-DOPA-PET和先进的MRI改善了用IDH抑制剂治疗的IDH1/2-突变性质瘤的治疗反应评估
Diego Prost1, Lucia Nichelli2, Laura Rozenblum3
1Hôpital La Pitié Salpêtrière Paris France.
概括
18F-DOPA-PET成像显示IDH1/2-突变质瘤患者接受IDH抑制剂的早期治疗反应. 这种PET成像生物标志物与先进的MRI一起,提供了比单独使用标准MRI更敏感的治疗效益评估.
科学领域:
- 神经瘤学神经瘤学
- 放射学 放射学是一门学科.
- 分子成像学分子成像学
背景情况:
- 针对IDH1/2-突变蛋白 (IDHi) 的小分子抑制剂对IDH1/2-突变质瘤有希望.
- 传统的MRI反应评估往往会延迟,难以解释,需要早期的预测生物标志物.
- 18F-DOPA-PET被研究为IDH1/2-突变性质瘤治疗反应的早期生物标志物.
研究的目的:
- 调查IDHi治疗的IDH1/2-突变性质瘤患者的18F-DOPA-PET和MRI反应.
- 为了比较18F-DOPA-PET和高级MRI序列与标准MRI的疗效,以评估治疗反应.
主要方法:
- 接受IDHi的IDH1/2-突变结质瘤患者在治疗前和后接受了MRI和18F-DOPA-PET扫描.
- 核磁共振包括T2-FLAIR,T1-后对比, perfusion 和扩散成像;18F-DOPA-PET包括代谢性瘤体积 (MTV),总损伤糖解 (TLG) 和瘤与背景比率 (TBR).
- 使用体积评估,RANO 2.0和PET RANO 1.0标准来评估疾病反应.
主要成果:
- 在10/20患者中观察到18F-DOPA-PET参数 (TBRmean,TBRmax,MTV) 的显著降低,与输液和扩散变化相关.
- 18F-DOPA-PET发现了9个部分反应和1个完整反应,而标准MRI显示稳定疾病是最佳反应.
- 基于MTV的PET反应与长时间的瘤控制相关.
结论:
- 18F-DOPA-PET显示出作为IDH1/2-突变质瘤治疗反应的早期生物标志物的潜力.
- 先进的MRI序列补充了标准的MRI,以评估对IDHi的治疗反应.
- 结合18F-DOPA-PET和高级MRI,与标准MRI标准相比,可以更好地评估治疗疗效.
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