Radiosynthesis and Biological Evaluation of N-[18F]Labeled Glutamic Acid as a Tumor Metabolic Imaging Tracer: e93262
We have previously reported that N-(2-[18F]fluoropropionyl)-L-methionine ([18F]FPMET) selectively accumulates in tumors. However, due to the poor pharmacokinetics of [18F]FPMET in vivo, the potential clinical translation of this observation is hampered. In this study, we rationally designed and synt...
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Published in | PloS one Vol. 9; no. 3 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
01.03.2014
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Abstract | We have previously reported that N-(2-[18F]fluoropropionyl)-L-methionine ([18F]FPMET) selectively accumulates in tumors. However, due to the poor pharmacokinetics of [18F]FPMET in vivo, the potential clinical translation of this observation is hampered. In this study, we rationally designed and synthesized [18F] or [11C]labeled N-position L-glutamic acid analogues for tumor imaging. N-(2-[18F]fluoropropionyl)-L-glutamic acid ([18F]FPGLU) was synthesized with a 30 plus or minus 10% (n = 10, decay-corrected) overall radiochemical yield and a specific activity of 40 plus or minus 25 GBq/ mu mol (n = 10) after 130 min of radiosynthesis. In vitro cell experiments showed that [18F]FPGLU was primarily transported through the XAG- system and was not incorporated into protein. [18F]FPGLU was stable in urine, tumor tissues, and blood. We were able to use [18F]FPGLU in PET imaging and obtained high tumor to background ratios when visualizing tumors tissues in animal models. |
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AbstractList | We have previously reported that N-(2-[18F]fluoropropionyl)-L-methionine ([18F]FPMET) selectively accumulates in tumors. However, due to the poor pharmacokinetics of [18F]FPMET in vivo, the potential clinical translation of this observation is hampered. In this study, we rationally designed and synthesized [18F] or [11C]labeled N-position L-glutamic acid analogues for tumor imaging. N-(2-[18F]fluoropropionyl)-L-glutamic acid ([18F]FPGLU) was synthesized with a 30 plus or minus 10% (n = 10, decay-corrected) overall radiochemical yield and a specific activity of 40 plus or minus 25 GBq/ mu mol (n = 10) after 130 min of radiosynthesis. In vitro cell experiments showed that [18F]FPGLU was primarily transported through the XAG- system and was not incorporated into protein. [18F]FPGLU was stable in urine, tumor tissues, and blood. We were able to use [18F]FPGLU in PET imaging and obtained high tumor to background ratios when visualizing tumors tissues in animal models. |
Author | Tang, Ganghua Yao, Baoguo Wang, Hongliang Du, Kan Hu, Kongzhen Huang, Tingting Yao, Shaobo Liang, Xiang Zang, Linquan |
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