CD38 inhibitor 1 (compound 78c, CD38-IN-78c, MDK-7553) is a potent inhibitor of CD38 with IC50 of 7.3 nM and 1.9 nM for human CD38 and mouse CD38, respetively.
In vitro:
CD38 inhibitor 1 (compound 78c) increases NAD+ levels, resulting in activation of pro-longevity and health span-related factors including sirtuins, AMPK, and PARPs.
In vivo:
CD38 inhibitor 1 (compound 78c) is found to not only be a very potent inhibitor, but also had suitable physiochemical properties to serve as a robust tool for in vivo studies. In addition, CD38 inhibitor 1 (compound 78c) is able to elevate NAD in both liver and gastrocnemius tissue when dosed orally in a DIO mouse.