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Published on: July 17, 2018
Design, synthesis and QSAR study of 2'-hydroxy-4'-alkoxy chalcone derivatives that exert cytotoxic activity by the
Silvia Marquina1, Maritza Maldonado-Santiago1, Jessica Nayelli Sánchez-Carranza2
1Centro de Investigaciones Químicas-IICBA, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Chamilpa, Cuernavaca, Morelos 62209, Mexico.
Abstract:
Eleven 4'-alkoxy chalcones were synthesized and biologically evaluated for their antiproliferative activity against four human tumor cell lines (PC-3, MCF-7, HF-6, and CaSki). Compounds 3a-3d and 3f were selective against PC-3, with IC50 values ranging from 8.08 to 13.75 μM. In addition, chalcones 3a-3c did not affect the normal fibroblasts BJ cells. The most active and selective compounds were further evaluated for their effect on the progression of cell cycle in PC-3 cells, and chalcones 3a and 3c induced a G2/M phase arrest. Furthermore, it was found that these three chalcones induced the mitochondrial apoptotic pathway by regulating Bax and Bcl-2 transcripts and by increasing caspase 3/7 activation. Otherwise, the QSAR model indicates that the double bond of the α,β-unsaturated carbonyl, as well as the planar structure geometry, are important to the biological activity of the synthetized chalcones. Based on these studies, it was concluded that withdrawing substituents in ring A, decrease the antiproliferative activity. This is related to the possible mechanism of action of these compounds, where a Michael addition needs to take place in order to be a potent anticancer agent.
Insights
New chalcone derivatives show potent anticancer activity, selectively targeting PC-3 cancer cells. These compounds arrest the cell cycle and induce apoptosis, offering a promising avenue for cancer drug discovery.
Area of Science:
- Medicinal Chemistry
- Organic Synthesis
- Cancer Biology
Background:
- Chalcones are a class of natural and synthetic compounds with diverse biological activities.
- Antiproliferative agents are crucial for cancer therapy.
- Understanding structure-activity relationships is key to developing effective anticancer drugs.
Purpose of the Study:
- To synthesize novel 4'-alkoxy chalcones.
- To evaluate their antiproliferative activity against human tumor cell lines.
- To elucidate their mechanism of action and structure-activity relationships.
Main Methods:
- Synthesis of eleven 4'-alkoxy chalcones.
- In vitro antiproliferative assays against PC-3, MCF-7, HF-6, and CaSki cell lines.
- Cell cycle progression analysis and apoptosis assays (Bax, Bcl-2, caspase 3/7 activation).
- Quantitative Structure-Activity Relationship (QSAR) modeling.
Main Results:
- Compounds 3a-3d and 3f exhibited selective antiproliferative activity against PC-3 cells (IC50: 8.08–13.75 μM) without affecting normal fibroblasts.
- Chalcones 3a and 3c induced G2/M phase cell cycle arrest in PC-3 cells.
- These compounds triggered apoptosis via the mitochondrial pathway, regulating Bax/Bcl-2 and activating caspase 3/7.
- QSAR analysis highlighted the importance of the α,β-unsaturated carbonyl and planar geometry for activity.
Conclusions:
- 4'-Alkoxy chalcones demonstrate significant antiproliferative and selective anticancer potential, particularly against PC-3 cells.
- The mechanism involves cell cycle arrest at G2/M and induction of mitochondrial apoptosis.
- Structural features, including the α,β-unsaturated carbonyl and specific substituents, are critical for activity, suggesting a Michael addition mechanism.
