国家神经系统疾病临床医学研究中心数据管理与共享系统
Data Management And Sharing System of China National Clinical Research Center for Neurological Diseases
Ga-68-PRGD2 PET/CT in the Evaluation of Glioma: A Prospective Study
基本信息
- 负责人：Li Deling, Zhao Xiaobin
- 数据来源： OTHERS
- 论文编号：OTHERS20190279
- 发表时间：2014-08-05
2014-08-05
已发表文章
主要研究背景及目的
方法
With informed consent, 12 patients with suspicious brain glioma, as diagnosed by enhanced magnetic resonance imaging (MRI) scanning, were enrolled to undergo Ga-68-PRGD2 PET/CT and F-18-FDG PET/CT scans before surgery. The preoperative images were compared and correlated with the pathologically determined WHO grade. Next, the expression of integrin alpha(v)beta(3), CD34, and Ki-67 were determined by immunohistochemical staining of the resected brain tumor tissue.
结论
This is the first noninvasive integrin imaging study, to the best of our knowledge, conducted in preoperative patients with different grades of glioma, and it preliminarily indicated the effectiveness of this novel method for evaluating glioma grading and demarcation.
主要结果
Our findings demonstrated that Ga-68-PRGD2 specifically accumulated in the brain tumors that were rich of integrin alpha(v)beta(3) and other neovasculature markers, but not in the brain parenchyma other than the choroid plexus. Therefore, Ga-68-PRGD2 PET/CT was able to evaluate the glioma demarcation more specifically than F-18-FDG PET/CT. The maximum standardized uptake values (SUVmax) of Ga-68-PRGD2, rather than those of F-18-FDG, were significantly correlated with the glioma grading. The maximum tumor-to-brain ratios (TBRmax) of both tracers were significantly correlated with glioma grading, whereas Ga-68-PRGD2 seemed to be more superior to F-18-FDG in differentiating high-grade glioma (HGG) from low-grade glioma (LGG). Moreover, Ga-68-PRGD2 PET/CT showed different accumulation patterns for HGG of WHO grades III and IV.