%0 Journal Article
%T [1,2,4]Triazolo[1,5-a]pyrimidine derivatives: Structure-activity relationship study leading to highly selective ENPP1 inhibitors.
%A Kawaguchi M
%A Minami S
%A Ieda N
%A Nakagawa H
%J Bioorg Med Chem Lett
%V 110
%N 0
%D 2024 Sep 15
%M 38851358
%F 2.94
%R 10.1016/j.bmcl.2024.129820
%X The STING (stimulator of interferon genes) pathway is one of the pathways that regulate innate immunity, and the extracellular hydrolytic enzyme ecto-nucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) has been identified as its dominant negative regulator. Since activation of the innate immune system is a promising strategy for the treatment of various infectious diseases and cancers, ENPP1 inhibitors have attracted great attention as candidate drugs. We have previously identified small-molecule ENPP1 inhibitors having a [1,2,4]triazolo[1,5-a]pyrimidine scaffold by means of chemical screening using a fluorescence probe, TG-mAMP. In this study, we evaluated the structure-activity relationships of the hit and lead compounds in detail, and succeeded in developing compounds that strongly and selectively inhibit ENPP1 not only in vitro, but also in cellular systems.