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- W4379743890 abstract "Prostate-specific membrane antigen (PSMA) is a promising target for metastatic castration-resistant prostate cancer. We previously reported the effectiveness of PSMA-DA1 as a PSMA-targeting radiotheranostic agent containing an albumin binder moiety. To further enhance tumor uptake, we newly designed PSMA-NAT-DA1 (PNT-DA1) by the introduction of a lipophilic linker into PSMA-DA1. The PSMA affinity of [111In]In-PNT-DA1 was increased (Kd = 8.20 nM) compared with that of [111In]In-PSMA-DA1 (Kd = 89.4 nM). [111In]In-PNT-DA1 showed markedly high tumor accumulation (131.6% injected dose/g at 48 h post-injection), and [111In]In-PNT-DA1 enabled the visualization of the tumor clearly at 24 h post-injection with SPECT/CT imaging. The administration of [225Ac]Ac-PNT-DA1 (2.5 kBq) led to shrinkage of the tumor without marked toxicity, and the antitumor effects of [225Ac]Ac-PNT-DA1 were superior to those of [225Ac]Ac-PSMA-DA1 and [225Ac]Ac-PSMA-617, which is the current gold standard for PSMA-targeting 225Ac-endoradiotherapy. These results suggest that the combination of [111In]In-PNT-DA1 and [225Ac]Ac-PNT-DA1 comprises a promising method of PSMA-targeting radiotheranostics." @default.
- W4379743890 created "2023-06-08" @default.
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- W4379743890 date "2023-06-07" @default.
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- W4379743890 title "Development of Novel <sup>111</sup>In/<sup>225</sup>Ac-Labeled Agent Targeting PSMA for Highly Efficient Cancer Radiotheranostics" @default.
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- W4379743890 doi "https://doi.org/10.1021/acs.jmedchem.3c00346" @default.
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