18F-FDG、^18F-RGD和^18F-FET在LN229脑胶质模型体内生物分布和Micro-PET显像

为研究肿瘤显像剂^18F-FDG、^18F-RGD和^18F-FET在LN229脑胶质瘤模型裸鼠体内分布和MicroPET肿瘤显像,采用酪氨酸和NOTA修饰的[c(RGDyK)]2为前体分别合成^18F-FET和^18F-RGD;颅内注射LN229细胞建立脑胶质瘤模型,研究^18F-FDG、^18F-RGD和^18F-FET在注射30min和60min体内脏器分布以及荷瘤鼠Micro-PET显像。结果表明,^18F-FET和^18F-RGD放化纯度大于95%。荷瘤鼠体内分布显示,注射后1h,^18F-FDG、^18F-RGD和^18F-FET在脑胶质瘤和脑组织内(括号内)的摄取分别为(4.89...

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Published in同位素 Vol. 28; no. 3; pp. 155 - 159
Main Author 高霞 张斌 王斌 黄洪波 李新平
Format Journal Article
LanguageChinese
Published 武汉市第五医院,湖北 武汉,430050%江苏省原子医学研究所,江苏 无锡,214000%无锡米度生物技术有限公司,江苏 无锡,214000 2015
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ISSN1000-7512
DOI10.7538/tws.2015.28.03.0155

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Summary:为研究肿瘤显像剂^18F-FDG、^18F-RGD和^18F-FET在LN229脑胶质瘤模型裸鼠体内分布和MicroPET肿瘤显像,采用酪氨酸和NOTA修饰的[c(RGDyK)]2为前体分别合成^18F-FET和^18F-RGD;颅内注射LN229细胞建立脑胶质瘤模型,研究^18F-FDG、^18F-RGD和^18F-FET在注射30min和60min体内脏器分布以及荷瘤鼠Micro-PET显像。结果表明,^18F-FET和^18F-RGD放化纯度大于95%。荷瘤鼠体内分布显示,注射后1h,^18F-FDG、^18F-RGD和^18F-FET在脑胶质瘤和脑组织内(括号内)的摄取分别为(4.89±0.65)%ID/g((2.72±0.76)%ID/g)、(2.10±0.32)%ID/g((0.23±0.01)%ID/g)、(3.02±0.64)%ID/g((0.74±0.12)%ID/g),^18F-FDG、^18F-RGD和^18F-FET在肿瘤和脑摄取放射性比值分别为0.64±0.07(1.80±0.32)、8.22±1.03(9.13±1.21)和2.15±0.48(4.08±0.92),Micro-PET肿瘤显像清晰。结果提示,^18F-FET和^18F-RGD更适用于脑胶质瘤的诊断。
Bibliography:11-2566/TL
glioma tumor; Micro-PET imaging; O-(2-^18F-fluoroethyl)-L-tyrosine
Biodistributions of micro-PET tracer ^18F-FDG, ^18F-RGD, and ^18F-FET in the LN229 induced glioma nude mice were performed using micro-PET technology. Tyrosine and NOTA modified [c(RGDyK)]2 were employed as precursors for the synthesis of ^18F-FET and ^18F-RGD. Glioma model was established via intracerebral injection of LN229 cells and the biodistribution in tumor and major organs at 30 min and 60 min postinjection of ^18F-FDG, ^18F-RGD, and ^18F-FET were determined by Gamma counting, respectively. The results showed more than 98% purity for ^18F-FET and ^18F-RGD.After 60 min injection of three radiotracers, the uptake values of ^18F-FDG, ^18F-RGD, and ^18F-FET in tumor and brain were 4. 89±0. 65%ID/g ((2. 72±0. 76)%ID/g), 2. 104. 0.32%ID/g ((0. 23±0.01)MID/g), and 3. 02±0. 64%ID/g ((0.74±0. 12)%ID/g), respectively. In addition, the ratio of tumor to brain of ^18F-FDG, ^18F-RGD, and ^18F- FETwere determined as 0.64±0.07(1.80±0.32), 8.
ISSN:1000-7512
DOI:10.7538/tws.2015.28.03.0155