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Cytotoxic Profiling of 3',4',5'-Trimethoxychalcones Reveals Cell-Line-Dependent Cytotoxic Activity: An In Vitro and
Aleksandar Y Mehandzhiyski1, Abdessamad Beraich2, Zhivko Velkov3
1Laboratory of Organic Electronics, Department of Science and Technology (ITN), Linköping University, Norrköping, Sweden.
Chemistry & Biodiversity
|May 14, 2026
Summary
This study evaluated 3
Area of Science:
- Medicinal Chemistry
- Pharmacology
- Cancer Research
Background:
- Chalcones are a class of natural compounds with potential anticancer properties.
- Structure-activity relationships of trimethoxychalcones require further investigation for targeted cancer therapy.
Purpose of the Study:
- To synthesize and evaluate the cytotoxic activity of 25 novel 3',4',5'-trimethoxychalcone derivatives against various human cancer cell lines.
- To compare the efficacy of these compounds with standard chemotherapeutic agents like melphalan and doxorubicin.
- To explore structure-activity relationships and identify key structural features for enhanced anticancer potency.
Main Methods:
- Synthesis of 25 trimethoxychalcone derivatives.
- In vitro cytotoxic assays against multiple human cancer cell lines, including drug-resistant models.
- Determination of half-maximal inhibitory concentration (IC50) values.
- Molecular docking studies to predict target interactions.
- Quantitative structure-activity relationship (QSAR) analysis.
Main Results:
- Several trimethoxychalcone derivatives demonstrated significant cytotoxic activity, outperforming melphalan in sensitive cell lines.
- Compounds 4, 5, 9, 10, 15, 16, and 24 exhibited particularly high potency, with some achieving submicromolar IC50 values.
- Cytotoxicity was cell-line dependent, with MCF-7 and SKW-3 cells being more sensitive than MDA-MB-231 and K-562 cells.
- Compound 10 retained activity against doxorubicin-resistant HL-60/DOX cells, and compound 16 showed a nine-fold increase in potency.
- QSAR and molecular docking revealed moderate, non-selective interactions, indicating no clear transferable trends.
Conclusions:
- 3',4',5'-trimethoxychalcones represent a promising scaffold for anticancer drug development.
- Cell-line-specific evaluation is crucial for understanding the therapeutic potential of these compounds.
- Context-aware optimization is necessary to enhance the potency and selectivity of trimethoxychalcone derivatives for targeted cancer therapy.
