STM:以谷氨酸为基础的PET成像能检测神经胶质瘤

2015-02-16 koo 生物360

一种成像技术利用了肿瘤对谷氨酸的嗜好来检测脑肿瘤,这种方法在患有神经胶质瘤病人参与的一项临床试验中获得了成功。癌症通常需要像葡萄糖这样的营养物的哺养来助其生长。 正电子发射断层扫描(PET)利用这一增强的代谢活动来给肿瘤成像,PET用的是一种被称作示踪剂的放射性化合物。葡萄糖的示踪剂会集中于喜好糖的细胞内,使得PET扫描仪能构建体内肿瘤的图像。然而,目前的PET成像不能用于神经胶

癌对谷氨酸的嗜好暴露了脑肿瘤

一种成像技术利用了肿瘤对谷氨酸的嗜好来检测脑肿瘤,这种方法在患有神经胶质瘤病人参与的一项临床试验中获得了成功。癌症通常需要像葡萄糖这样的营养物的哺养来助其生长。

正电子发射断层扫描(PET)利用这一增强的代谢活动来给肿瘤成像,PET用的是一种被称作示踪剂的放射性化合物。葡萄糖的示踪剂会集中于喜好糖的细胞内,使得PET扫描仪能构建体内肿瘤的图像。然而,目前的PET成像不能用于神经胶质瘤,因为脑内的正常细胞和癌性细胞都会消耗葡萄糖。

Sriram Venneti和同事研发了一种谷氨酸示踪剂,谷氨酸是肿瘤消耗的另外一种主要的营养物。他们在一个神经胶质瘤的小鼠模型中证明,谷氨酸示踪剂会被脑肿瘤吸收,但不会被周围健康组织吸收。

在一个有6名患有神经胶质瘤病人参与的试验的早期阶段,谷氨酸示踪剂清楚地显示了肿瘤边界的轮廓,甚至能将代谢活性高的恶性肿瘤与那些不再生长且代谢不活跃的肿瘤区域分开来。以谷氨酸为基础的PET成像有望成为检测脑癌并在治疗中监控肿瘤代谢活性变化的一种强有力的工具。

原始出处:

Venneti S1, Dunphy MP2, Zhang H3, Pitter KL4, Zanzonico P5, Campos C6, Carlin SD7, La Rocca G4, Lyashchenko S8, Ploessl K9, Rohle D10, Omuro AM11, Cross JR12, Brennan CW13, Weber WA14, Holland EC15, Mellinghoff IK16, Kung HF9, Lewis JS17, Thompson CB18.Glutamine-based PET imaging facilitates enhanced metabolic evaluation of gliomas in vivo.Sci Transl Med. 2015 Feb 11;7(274):274ra17. doi: 10.1126/scitranslmed.aaa1009.


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    2016-01-14 gdsun
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    2015-07-14 feather89
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    2015-02-16 Johnny1989

    谢谢分享!

    0

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    2015-02-16 windmilL1989

    以阅

    0

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