α-Emitting cancer therapy using 211 At-AAMT targeting LAT1

Cancer Science(2021)

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摘要
α-Methyl-l-tyrosine (AMT) has a high affinity for the cancer-specific l-type amino acid transporter 1 (LAT1). Therefore, we established an anti-cancer therapy, with 211 At-labeled α-methyl-l-tyrosine (211 At-AAMT) as a carrier of 211 At into tumors. 211 At-AAMT had high affinity for LAT1, inhibited tumor cell growth, and induced DNA double-stranded breaks in vitro. We evaluated the accumulation of 211 At-AAMT in vivo and the role of LAT1. Treatment with 0.4 MBq/mouse 211 At-AAMT inhibited tumor growth in the PANC-1 tumor model and 1 MBq/mouse 211 At-AAMT inhibited metastasis in the lung of the B16F10 metastasis model. Our results suggested that 211 At would be useful for anti-cancer therapy and that LAT1 is suitable as a target for radionuclide therapy.
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cancer therapy
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