Chalcones: a valid scaffold for monoamine oxidases inhibitors

Area of Science:

• Medicinal Chemistry
• Enzymology
• Computational Biology

Background:

• Human monoamine oxidases (hMAO-A and hMAO-B) are crucial enzymes involved in neurotransmitter metabolism.
• Dysregulation of hMAO activity is implicated in various neurological and psychiatric disorders.
• Chalcones represent a promising scaffold for developing enzyme inhibitors.

Purpose of the Study:

• To synthesize and evaluate a series of substituted chalcones for their inhibitory activity against hMAO-A and hMAO-B.
• To elucidate the structure-activity relationships and selectivity of potent chalcone inhibitors.
• To utilize molecular modeling to understand enzyme-inhibitor interactions and guide rational drug design.

Main Methods:

• In vitro enzymatic assays to determine hMAO-A and hMAO-B inhibition.
• Synthesis of diverse substituted chalcone compounds.
• Molecular docking studies using high-resolution crystallographic structures of hMAO-A and hMAO-B.

Main Results:

• All synthesized chalcones exhibited selective inhibition of hMAO-B in the micro- to nanomolar range.
• Compounds with chlorine and hydroxyl or methoxyl substituents showed the most potent hMAO-B inhibition.
• Molecular modeling provided insights into the binding modes and selectivity of the most active compounds.

Conclusions:

• Chalcone derivatives are effective and selective inhibitors of hMAO-B.
• Specific substituents enhance inhibitory potency and selectivity.
• Molecular modeling is a valuable tool for the rational design of novel hMAO inhibitors based on the chalcone scaffold.