Abstract
Background: Extensive research has been conducted on aspirin, a widely recognized NSAID medication,
regarding its potential as an anticancer agent. Studies have revealed its ability to trigger cell death in different
types of cancer cells.
Methods: A set of aspirin-chalcone mimic conjugates 5a-k and 6a-d utilizing the freshly prepared acid chloride
of aspirin moiety has been designed and synthesized. To evaluate the newly developed compounds, the NCI 60-
cell line panel was employed to assess their anti-proliferative properties. Subsequently, cell cycle analysis was
conducted along with an examination of the compounds' impact on the levels of p53, Bax, Bcl-2, active caspase-
3, and their inhibition mechanism of tubulin polymerization.
Results: Derivative 6c displayed the best anticancer activity among the tested series while 6d was the best against
breast cancer MDA-MB-468, therefore both of them were selected for the 5-dose stage, however, targeting
MDA-MB-468, PI-flow cytometry of compound 6d proved the triggered cell growth arrest at the G1/S phase
avoiding the mitotic cycle in MDA-MB-468 cells. Similarly, the upregulation of oncogenic parameters such as
caspase-3, p53, and Bax/Bcl-2, along with the inhibition of PARP-1 enzyme level, was observed with compound
6d. This compound also exhibited a significant ability to induce apoptosis and disrupt the intracellular microtubule
network through a promising activity as a tubulin polymerization inhibitor with IC50 = 1.065 ± 0.024 ng/ml.
Furthermore, to examine the manner in which compound 6d binds to the active pocket of the tubulin polymerization
enzyme, a molecular docking study was conducted.
Conclusion: The study indicated that compound 6d could be a powerful microtubule-destabilizing agent. Therefore,
further research on 6d could be worthwhile.
Keywords:
Aspirin, antitumor, NCI 60-cell, microtubules, docking, apoptosis.
Graphical Abstract
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