Novel Stilbene-Nitroxyl Hybrid Compounds Display Discrete Modulation of Amyloid Beta Toxicity and Structure

Area of Science:

• Neuroscience
• Biochemistry
• Pharmacology

Background:

• Neurodegenerative diseases, including Alzheimer's, are linked to misfolded protein aggregates called toxic oligomers.
• The structural basis of toxic oligomer toxicity and their role in cellular dysfunction remain poorly understood.
• Oligomer heterogeneity complicates understanding disease etiology and developing effective drug targets.

Purpose of the Study:

• To synthesize and evaluate bifunctional stilbenes as modulators of amyloid beta oligomer (AβO) conformation and associated oxidative stress.
• To investigate the potential of these novel molecules to counteract the molecular pathogenesis of Alzheimer's disease.

Main Methods:

• Synthesis of a class of bifunctional stilbenes.
• Utilizing neuronal culture models to assess the efficacy of stilbenes against AβO.
• Employing biophysical techniques to examine AβO structural alterations induced by stilbene candidates.

Main Results:

• Demonstrated that bifunctional stilbenes can synergistically counter AβO-induced toxicity and oxidative stress in neuronal cultures.
• Observed that each stilbene candidate uniquely modifies AβO conformation and bioactivity.
• Established correlations between AβO structural modulation and observed bioactivity.

Conclusions:

• Bifunctional stilbenes show promise as structural correctors for AβO, offering a multi-target approach for Alzheimer's disease modification.
• These novel small molecules effectively intervene with intraneuronal AβO, addressing early disease triggers like oxidative stress and inflammation.