68Ga-labeled inhibitors of prostate-specific membrane antigen (PSMA) for imaging prostate cancer.

68Ga-labeled inhibitors of prostate-specific membrane antigen (PSMA) for imaging prostate cancer.
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DOI:
10.1021/jm100623e
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发表时间:
2010-07-22
影响因子:
7.3
通讯作者:
Pomper MG
Pomper MG
中科院分区:
医学1区
文献类型:
--
作者:
Banerjee SR;Pullambhatla M;Byun Y;Nimmagadda S;Green G;Fox JJ;Horti A;Mease RC;Pomper MG

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Gallium-68 is a generator-produced radionuclide for positron emission tomography (PET) that is being increasingly used for radiolabeling of tumor-targeting peptides. Compounds [68Ga]3 and [68Ga]6 are high-affinity, urea-based inhibitors of the prostate-specific membrane antigen (PSMA) that were synthesized in decay-uncorrected yields ranging from 60 – 70% and radiochemical purities of more than 99%. Compound [68Ga]3 demonstrated 3.78 ± 0.90 percent injected dose per gram of tissue (%ID/g) within PSMA+ PIP tumor at 30 min post-injection, while [68Ga]6 showed a two hour PSMA+ PIP tumor uptake value of 3.29 ± 0.77%ID/g. Target (PSMA+ PIP) to non-target (PSMA− flu) ratios were 4.6 and 18.3, respectively, at those time points. Both compounds delineated tumor clearly by small animal PET. The urea series of imaging agents for PSMA can be radiolabeled with 68Ga, a cyclotron-free isotope useful for clinical PET studies, with maintenance of target specificity.
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