Synthesis and biological evaluation of andrographolide analogues as anti-cancer agents

Area of Science:

• Natural Product Chemistry
• Cancer Biology
• Pharmacology

Background:

• Andrographolide, a natural compound, has shown potential anti-cancer properties.
• Developing novel analogues with improved efficacy and reduced toxicity is crucial for cancer therapy.

Purpose of the Study:

• To synthesize and evaluate a new family of andrographolide analogues for anti-cancer activity.
• To investigate the mechanism of action of the most potent analogues.

Main Methods:

• In vitro synthesis and screening of andrographolide analogues against HEK-293 and MCF-7 cancer cell lines.
• Cell-based assays including MTT, immunostaining, FACS, western blotting, and NF-κB activity assessment.
• Evaluation of toxicity in normal cell lines (VERO and MCF-10A).

Main Results:

• Active analogues (2b, 2c, 4c) demonstrated higher anti-cancer potency than andrographolide.
• These compounds exhibited low toxicity to normal cells.
• Apoptosis induction was evidenced by increased Bax/Bcl-xL ratio, caspase 3 activation, sub-G1 population, elevated p53, and reduced NF-κB activity.

Conclusions:

• The novel andrographolide analogues possess significant anti-cancer potential.
• The anti-cancer effects are mediated through a p53-dependent apoptotic pathway.
• These compounds represent promising candidates for further development as anti-cancer agents.