New chalcone-type compounds and 2-pyrazoline derivatives: synthesis and caspase-dependent anticancer activity

Area of Science:

• Medicinal Chemistry
• Pharmacology
• Cancer Biology

Background:

• There is a critical need for novel anticancer agents with improved selectivity and efficacy.
• Chalcones and pyrazolines are heterocyclic compounds with diverse biological activities, including anticancer potential.

Purpose of the Study:

• To synthesize and evaluate the anticancer activity of novel chalcone derivatives.
• To investigate the mechanism of action of the most potent compounds against cancer cell lines.

Main Methods:

• Synthesis of 2-pyrazoline and chalcone derivatives.
• Anticancer activity screening against human lung (A549) and stomach (AGS) cancer cell lines.
• Evaluation of cytotoxicity in noncancerous human lung fibroblasts (MRC-5).
• Mechanistic studies including cell viability, mitochondrial membrane potential assays, and caspase-3 activation assessment.

Main Results:

• 2-Pyrazolines showed no toxicity across tested cell lines.
• Chalcones with a β-(benz)imidazole moiety exhibited toxicity specifically against the AGS cell line.
• Mechanistic studies revealed loss of cell viability and mitochondrial membrane potential, indicative of regulated cell death.
• Caspase-3 activation was identified as a key event in the observed cell death pathway.

Conclusions:

• Chalcones 1-3 are identified as promising novel anticancer agents.
• These compounds demonstrate selective toxicity towards the AGS stomach cancer cell line.
• The mechanism involves caspase-3-mediated regulated cell death, highlighting their therapeutic potential.