BMS-708,163 Targets Presenilin and Lacks Notch-Sparing Activity

Christina J. Crump, Suita V. Castro, Feng Wang, Nikolay Pozdnyakov, T. Eric Ballard, Sangram S. Sisodia, Kelly R. Bales, Douglas S. Johnson, Yue‐Ming Li

Biochemistry · 2012 · 95 citations · 14 references

Concepts

Abstract

The "Notch-sparing" γ-secretase inhibitor (GSI) BMS-708,163 (Avagacestat) is currently in phase II clinical trials for Alzheimer's disease. Unlike previously failed GSIs, BMS-708,163 is considered to be a promising drug candidate because of its reported Notch-sparing activity for the inhibition of Aβ production over Notch cleavage. We now report that BMS-708,163 binds directly to the presenilin-1 N-terminal fragment and that binding can be challenged by other pan-GSIs, but not by γ-secretase modulators. Furthermore, BMS-708,163 blocks the binding of four different active site-directed GSI photoaffinity probes. We therefore report that this compound acts as a nonselective γ-secretase inhibitor.

References

14