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  • Title: Melanoma targeting property of a Lu-177-labeled lactam bridge-cyclized alpha-MSH peptide.
    Author: Guo H, Miao Y.
    Journal: Bioorg Med Chem Lett; 2013 Apr 15; 23(8):2319-23. PubMed ID: 23473679.
    Abstract:
    The purpose of this study was to determine the melanoma targeting property of (177)Lu-DOTA-GGNle-CycMSHhex in B16/F1 melanoma-bearing C57 mice. (177)Lu-DOTA-GGNle-CycMSHhex exhibited high receptor-mediated melanoma uptake and fast urinary clearance. The tumor uptake of (177)Lu-DOTA-GGNle-CycMSHhex was 20.25 ± 4.59 and 21.63 ± 6.27% ID/g at 0.5 and 2h post-injection, respectively. Approximately 83% of injected dose cleared out the body via urinary system at 2h post-injection. (177)Lu-DOTA-GGNle-CycMSHhex showed high tumor to normal organ uptake ratios except for the kidneys. The tumor/kidney uptake ratios of (177)Lu-DOTA-GGNle-CycMSHhex were 2.76 and 1.74 at 2 and 24h post-injection. The melanoma lesions were clearly visualized by SPECT/CT using (177)Lu-DOTA-GGNle-CycMSHhex as an imaging probe at 2h post-injection. Overall, high melanoma uptake coupled with fast urinary clearance of (177)Lu-DOTA-GGNle-CycMSHhex underscored its potential for melanoma treatment in the future.
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