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Updated: Jun 10, 2026

Quantitative Measurement of γ-Secretase-mediated Amyloid Precursor Protein and Notch Cleavage in Cell-based Luciferase Reporter Assay Platforms
Published on: January 25, 2018
Iminoheterocycles as gamma-secretase modulators
John P Caldwell1, Chad E Bennett, Troy M McCracken
1Merck Research Laboratories, 2015 Galloping Hill Road, Kenilworth, NJ 07033, United States. john.caldwell@merck.com
Researchers developed new iminoheterocycles to modulate gamma-secretase activity. These compounds show potent gamma-secretase modulation, good pharmacokinetics, and reduce Abeta42 levels in vivo.
Area of Science:
- Medicinal Chemistry
- Neuroscience
- Drug Discovery
Background:
- Gamma-secretase plays a crucial role in amyloid precursor protein processing.
- Dysregulation of gamma-secretase contributes to Alzheimer's disease pathogenesis.
- Developing effective modulators of gamma-secretase is a key therapeutic strategy.
Purpose of the Study:
- To synthesize and characterize novel iminoheterocycles as gamma-secretase modulators.
- To establish the structure-activity relationship (SAR) for this new chemical series.
- To evaluate the in vivo efficacy of promising compounds.
Main Methods:
- Synthesis of a novel series of iminoheterocycles.
- Structure-activity relationship (SAR) studies.
- In vitro gamma-secretase activity assays.
- In vivo pharmacokinetic studies in rats.
- Assessment of Abeta42 levels in various animal models.
Main Results:
- Successful synthesis of a novel series of iminoheterocycles.
- Identification of a unique bicyclic core from initial monocyclic leads.
- Demonstrated good potency of selected compounds as gamma-secretase modulators.
- Observed excellent pharmacokinetic profiles in rat models.
- Confirmed reduction of Abeta42 levels in vivo.
Conclusions:
- Novel iminoheterocycles effectively modulate gamma-secretase activity.
- The developed bicyclic core represents a promising scaffold for drug discovery.
- These compounds demonstrate therapeutic potential for Alzheimer's disease by lowering Abeta42.
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