MK-0752

MK-0752 is a potent gamma secretase inhibitor, an enzyme required for Notch pathway activation. MK-0752 reduces Aβ40 production with IC50 of 5 nM in human SH-SY5Y cells. MK-0752 blocks Notch-intracellular domain (ICD) cleavage and its subsequent nuclear translocation in vitro. MK-0752 treatment increases levels of Aβ 1-14, Aβ 1-15 and Aβ 1-16, while decreases levels of Aβ 1-17. Phase I clinical trials has been completed in 2006, and the results reported showed that MK-0752 was well-tolerated in a limited number of patients below 300 mg/m2, and further enrollment was underway to establish the MTD.