Information Itanapraced (CHF 5074) Itanapraced (CHF 5074, CSP-1103) is a gamma-secretase modulator that reduces Aβ42 and Aβ40 secretion. The IC50s of CHF5074 for inhibition of COX-1 and COX-2 is above 100 μmol/L. Targets γ secretase In vitro In human neuroglioma cells over-expressing the Swedish mutated APP [human neuroglioma cell line expressing APPswe (H4swe)], CHF5074 preferentially lowers Aβ42 secretion with an IC50 of 3.6 µmol/L. CHF5074 does not display inhibitory activity on COX-1 and COX-2 enzymes when employed at concentrations up to 100 µmol/L and 300 µmol/L respectively. In vivo In rats, CHF5074 is orally well absorbed (50%) and is slowly eliminated from plasma (t1/2 ≈ 20 h). In Tg2576 transgenic mice, chronic treatment with CHF5074 markedly reduces brain Aβ burden without histological signs of peripheral Notch-mediated toxicity.