Dxd-D5 (Exatecan-D5 derivative for ADC) 是 Dxd 的氚代物。Dxd 是一种有效的 DNA topoisomerase I 抑制剂，IC50 值为 0.31 μM，可用作靶作用于 HER2 的抗体偶联药物 ADC (DS-8201a) 的有效载荷。
Dxd-D5 (Exatecan-D5 derivative for ADC) is a deuterium labeled Dxd. Dxd is a potent DNA topoisomerase I inhibitor, with an IC50 of 0.31 μM, used as a conjugated drug of HER2-targeting ADC (DS-8201a) [1].
Stable heavy isotopes of hydrogen, carbon, and other elements have been incorporated into drug molecules, largely as tracers for quantitation during the drug development process. Deuteration has gained attention because of its potential to affect the pharmacokinetic and metabolic profiles of drugs[2].
[1]. Ogitani Y, et al. DS-8201a, A Novel HER2-Targeting ADC with a Novel DNA Topoisomerase I Inhibitor, Demonstrates a Promising Antitumor Efficacy with Differentiation from T-DM1. Clin Cancer Res. 2016 Oct 15;22(20):5097-5108.
[2]. Russak EM, et al. Impact of Deuterium Substitution on the Pharmacokinetics of Pharmaceuticals. Ann Pharmacother. 2019;53(2):211-216.
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