Natural products based crown ethers: synthesis and their anticancer potential

Area of Science:

• Medicinal Chemistry
• Natural Products Chemistry
• Pharmacology

Background:

• Natural products serve as a rich source for drug discovery.
• Crown ethers are a class of cyclic compounds with diverse applications.
• Developing novel anticancer agents with improved efficacy and reduced toxicity is a critical need.

Purpose of the Study:

• To synthesize novel crown ethers incorporating biologically active natural product scaffolds.
• To evaluate the anticancer potential of these novel crown ethers against human cancer cell lines.
• To compare the antiproliferative activity of the synthesized crown ethers with their parent natural precursors and a standard drug.

Main Methods:

• Synthesis of four novel crown ethers using tetrahydroisoquinoline, chrysin, and biochanin-A as side arms.
• Antiproliferative activity assessment using NCI-H460 (non-small lung carcinoma) and MCF-7 (breast adenocarcinoma) cell lines.
• Cytotoxicity evaluation against NIH-3T3 cell lines.

Main Results:

• The synthesized crown ethers exhibited significant antiproliferative effects on cancer cell lines.
• Crown ether formation enhanced the anticancer profile of the parent natural compounds.
• The biochanin-A derived crown ether showed a threefold higher activity against lung carcinoma compared to cisplatin (IC50 = 6.08 µM vs 19.00 µM).
• Reduced cytotoxicity was observed for NIH-3T3 cell lines compared to parent natural structures.

Conclusions:

• Novel natural product-based crown ethers possess promising anticancer properties.
• Crown ether modification of natural products can lead to enhanced antiproliferative activity, especially for lung carcinoma.
• These findings suggest a potential new strategy for developing effective carcinostatic drugs.