Radiology:利用PET评价肿瘤谷氨酰胺的价值

2018-06-07 shaosai MedSci原创

本研究旨在评价谷氨酰胺类似物显像剂氟18(2S,4R)-4-氟谷胺(FGLN)的临床安全性、药代动力学和肿瘤显像特点。

本研究旨在评价谷氨酰胺类似物显像剂氟18(2S,4R)-4-氟谷胺(FGLN)的临床安全性、药代动力学和肿瘤显像特点。

本研究已通过机构审查委员会批准。本研究是在美国食品和药物管理局的批准下,根据美国《赫尔辛基宣言》和《健康保险可移植性和问责制法案》开展的研究性新药申请。所有患者均提供书面知情同意书。在2013年1月至2016年10月期间,25名成年癌症患者接受FGln tracer静脉注射(平均,244毫巴±118,<100μg),随后进行正电子发射断层扫描(PET)和血液放射分析。使用描述性统计来汇总患者数据。通过使用Bonferroni校正的非参数单因素方差分析来比较非禁食患者(n=13)和注射前至少禁食8小时的患者的FGln生物分布和血浆氨基酸水平。用Fisher精确检验评价PET扫描患者(n=15)的Tumor FGln亲和性与氟脱氧葡萄糖(FDG)亲和性。P<0.05被认为是有统计学意义的差异。

结果为25例患者的FGLN PET中有17例显示不同类型的肿瘤(乳腺癌胰腺癌、肾、神经内分泌癌、肺癌结肠癌淋巴瘤、胆管癌、胶质瘤),其中主要是临床突变的肿瘤,其突变与谷氨酰胺异常代谢有关。急性禁食对FGln生物分布和血浆氨基酸水平没有显着影响。FDG亲和性高的肿瘤对FDG亲和性非常高,反之亦然(p=0.07)。患者无不良反应。

结论为,谷氨酰胺作为几种不同癌症类型靶向放射性示踪剂成像的潜在肿瘤生物标志物,初步的人体FGln PET试验结果提供了其异常代谢的临床验证。

原始出处:

Dunphy MPS, Harding JJ, Venneti S. et al.In Vivo PET Assay of Tumor Glutamine Flux and Metabolism: In-Human Trial of 18F-(2S,4R )-4-Fluoroglutamine.Radiology.DOI:10.1148/radiol.2017162610

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    2018-06-19 feather89
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