Design, Synthesis, and Biological Evaluation of Novel MAO-A Inhibitors Targeting Lung Cancer

Area of Science:

• Oncology
• Medicinal Chemistry
• Biochemistry

Background:

• Lung cancer is a leading cause of cancer mortality globally.
• Monoamine Oxidase-A (MAO-A) enzyme activity contributes to DNA damage and tumor progression via reactive oxygen species (ROS).
• Existing MAO-A inhibitors are primarily used as antidepressants, with their anticancer potential under investigation.

Purpose of the Study:

• To discover and develop novel MAO-A inhibitors with potential anticancer activity.
• To investigate the antiproliferative effects of new MAO-A inhibitors on lung cancer cell lines.
• To explore the binding interactions of these inhibitors with the MAO-A enzyme.

Main Methods:

• Ligand- and structure-based drug design approaches were employed.
• A series of 1H indole-2-carboxamide derivatives were synthesized and characterized (1H-NMR, 13C-NMR, IR).
• Antiproliferative effects were assessed using MTT assays, and MAO-A activity was measured. Molecular docking studies were performed.

Main Results:

• The novel MAO-A inhibitors demonstrated significant dose- and time-dependent inhibition of lung cancer cell growth.
• Specific compounds (S1, S2, S4, S7, S10) exhibited IC50 values in the micromolar range against A549 cells.
• Molecular docking simulations confirmed favorable binding of the derivatives within the MAO-A active site, interacting with key residues.

Conclusions:

• MAO-A plays a significant role in lung cancer progression.
• The developed 1H indole-2-carboxamide derivatives show promise as novel anticancer agents targeting MAO-A.
• MAO-A inhibition represents a potential therapeutic strategy for lung cancer chemotherapy.