Affiliation:
1. Department of Chemistry, Jagannath University, Dhaka 1100, Bangladesh
2. Division of Bioscience, Dongguk
University, Gyeongju 780-714, Republic of Korea
Abstract
Aims:
The aim of the study was to search for new anticancer agents as TRKA inhibitors.
Background:
A series of new salicylic acid hydrazide hydrazones were synthesized and evaluated
for their in vitro anticancer activities against lung (A549), ovarian (SK-OV-3), skin (SK-MEL-2),
and colon (HCT15) cancer cell lines, and tropomyosin receptor kinase A (TRKA) inhibitory activities.
Objective:
In this study, we focused on the synthesis and anticancer properties evaluation of salicylic
acid hydrazide hydrazones as TRKA inhibitors. The in vitro anticancer activities of hydrazone analogs
were measured against four cancer cell lines, and the TRKA inhibitory properties were investigated
using an enzyme assay to determine their modes of action. In silico molecular docking was
conducted using the crystal structure of the TRKA receptor to study the interactions and modes of
binding at its active site, and ligand-based target predictions were used to identify putative secondary
enzymatic targets of the synthesized compounds. Additionally, pharmacokinetic properties, toxicity
effects, and drug scores of the studied molecules were also assessed.
Methods:
A series of hydrazide hydrazones were prepared by means of a facile and straight-forward
two-step reaction under soft reflux conditions from a methyl ester of substituted aromatic acids and
hydrazine hydrate followed by the condensation with substituted aldehydes. In vitro cytotoxic properties
of the synthesized compounds were screened against four human cancer cells using the SRB
(sulforhodamine-B) colorimetric method. The TRKA inhibitory activity was measured by enzymatic
assay. In silico ADME, drug score properties, docking studies, and ligand-based target prediction
analyses were performed using Osiris Cheminformatics and AutoDock Vina, and SwissTargetPrediction
bioinformatics software.
Results:
In vitro bioassays revealed that compound 6 exhibited the most potent broad-spectrum anticancer
activities with IC50 values of 0.144, <0.001, 0.019, and 0.022 μM against A549, SK-OV-3,
SK-MEL-2, and HCT15 cancer cells, respectively, followed by compounds 11, 3a, and 9. In TRKA
inhibitory assays, compounds 3e and 11 demonstrated the highest potency with IC50 values of 111
and 614 nM, respectively. The results of docking studies on 3e and 11 with the active site of the
TRKA receptor revealed that both compounds interacted as previously reported TRKA inhibitors
with high docking scores.
Conclusion:
New salicylic acid hydrazide hydrazones were synthesized, and the most active compounds
exhibited significant anticancer properties against A549, SK-OV-3, SK-MEL-2, and HCT15
cancer cells, suggesting to be good candidates for in vivo studies.
The results obtained in the present study would help in the design and preparation of new hydrazidehydrazone
analogs as potential TRKA inhibitors for cancer treatment.
Publisher
Bentham Science Publishers Ltd.
Cited by
1 articles.
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