bc8b00320_si_001.pdf (2.94 MB)
Tuning the Diels–Alder Reaction for Bioconjugation to Maleimide Drug-Linkers
journal contribution
posted on 2018-06-22, 19:13 authored by Andre
H. St. Amant, Daniel Lemen, Stelios Florinas, Shenlan Mao, Christine Fazenbaker, Haihong Zhong, Herren Wu, Changshou Gao, R. James Christie, Javier Read de AlanizThe thiol–maleimide
linkage is widely used for antibody–drug
conjugate (ADC) production; however, conjugation of maleimide–drugs
could be improved by simplified procedures and reliable conjugate
stability. Here, we report the evaluation of electron-rich and cyclic
dienes that can be appended to antibodies and reacted with maleimide-containing
drugs through the Diels–Alder (DA) reaction. Drug conjugation
is fast and quantitative due to reaction acceleration in water, and
the linkage is more stable in serum than in the corresponding thiol–maleimide
adduct with the same drug. ADCs produced using the DA reaction (DAADCs)
are effective in vitro and in vivo, demonstrating the utility of this
reaction in producing effective biotherapeutics. Given the large number
of commercially available maleimide compounds, this conjugation approach
could be readily applied to the production of a wide range of antibody
(or protein) conjugates.