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• W3042974916 abstract "^99mTc-PHC-102 is a ^99mTc-labeled derivative of acetazolamide, a high-affinity small organic ligand of carbonic anhydrase IX (CAIX). ^99mTc-PHC-102 has previously shown favorable in vivo biodistribution properties in mouse models of CAIX-positive clear cell renal cell carcinoma (ccRCC) and colorectal cancer. In this study, we aimed to explore the targeting performance of ^99mTc-PHC-102 in SPECT in patients with renal cell carcinoma while also assessing the safety and tolerability of the radiotracer. <b>Methods:</b> We studied 5 patients with localized or metastatic ccRCC in a microdosing regimen, after the administration of a 50-μg total of CAIX ligand and 600–800 MBq of ^99mTc-PHC-102. Tissue distribution and residence time in normal organs and tumors were analyzed by serial SPECT/CT scans at 3 time points (30 min, 2 h, and 6 h) after intravenous administration. <b>Results:</b> In the 5 patients studied, ^99mTc-PHC-102 was well tolerated and no study drug–related adverse events were recorded. In the stomach, kidneys, and gallbladder, the radiotracer showed a rapid initial uptake, which cleared over time. Localization of the study drug in primary tumors of 5 patients was observed, with favorable tumor-to-background ratios. ^99mTc-PHC-102 SPECT/CT allowed the identification of 4 previously unknown lung and lymph node metastases in 2 patients. <b>Conclusion:</b>^99mTc-PHC-102 is a promising SPECT tracer for the imaging of patients with ccRCC. This tracer has the potential to identify primary and metastatic lesions in different anatomic locations. ^99mTc-PHC-102 might also serve as a companion diagnostic agent for future CAIX-targeting therapeutics." @default.
• W3042974916 created "2020-07-23" @default.
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• W3042974916 date "2020-07-17" @default.
• W3042974916 modified "2023-10-18" @default.
• W3042974916 title "A Microdosing Study with ^99mTc-PHC-102 for the SPECT/CT Imaging of Primary and Metastatic Lesions in Renal Cell Carcinoma Patients" @default.
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• W3042974916 doi "https://doi.org/10.2967/jnumed.120.245530" @default.
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