Synthesis, molecular docking and biological evaluation of 1,3,4-oxadiazole derivatives as potential immunosuppressive agents (original) (raw)
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Anticancer Research
Background/Aim: The identification of a series of oxadiazole-based compounds as promising antiproliferative agents has been previously reported. The aim of this study was to explore the SAR of newly synthesized oxadiazole derivatives and identify their molecular targets. Materials and Methods: A small library of 1,2,5-oxadiazole derivatives was synthetized and their antiproliferative activity was tested by MTT assay. Their interaction with topoisomerase I was evaluated and a molecular docking study was performed. Results: Several candidates showed cytotoxicity towards two human tumor cell lines, HCT-116 (colorectal carcinoma) and HeLa (cervix adenocarcinoma). Some derivatives exhibited inhibitory effects on the catalytic activity of topoisomerase I and this effect was supported by docking studies. Conclusion: The enzyme inhibition results, although not directly related to cytotoxicity, suggest that a properly modified 1,2,5 oxadiazole scaffold could be considered for the development of new antitopo I agents. Cancer is one of the main causes of morbidity and mortality worldwide, causing approximately 1 in 6 deaths (1). Materials and Methods Chemistry. Reagents and solvents were purchased from Sigma-Aldrich (St. Louis, MO, USA) and used without further purification.
Bioorganic & Medicinal Chemistry Letters, 2020
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International Journal of Pharmaceutical Sciences and Drug Research, 2018
Neoplasia is a type of abnormal and excessive growth of tissue. The growth of a neoplasia is uncoordinated with that of the normal surrounding tissue, and it persists growing abnormally, even if the original trigger is removed. This abnormal growth usually forms a mass. The main objective of the present research work was the synthesis, characterization and evaluation of in vivo antitumour activity of some novel 2, 5-disubstituted 1, 3, 4-oxadiazole derivatives. The in vivo antitumour activity of synthesized compounds was evaluated by HT 29 cell line induced malignant ascites on mouse model. The apoptosis of HT 29 cells was evaluated by using Gimsa and H33342 stain and the apoptosis ratios were analysed by FCM using AnnexinV-FITC/PI staining. The present experimental data displayed that the mortality was less in all groups except in tumour control group and all the synthesized compounds AB1-AB8 (100 mg/kg) significantly increased the PILS. While 5-FU increased the life span of 97.72%...
Synthesis and biological potentials of some new 1,3,4-oxadiazole analogues
Medicinal Chemistry Research, 2017
In continuation of our research to explore new antiproliferative agents, we report herein the synthesis and antiproliferative activity of two new series of N-(substituted phenyl)-5-aryl-1,3,4-oxadiazol-2-amine (4a-j) and N-{[5aryl-1,3,4-oxadiazol-2-yl]methyl}-substituted aniline (4k-t) analogs. The antiproliferative activity of fifteen compounds (4a-h, and 4n) was tested against nine different panels of nearly 60 NCI human cancer cell lines. N-(2-Methoxyphenyl)-5-(4-chlorophenyl)-1,3,4-oxadiazol-2-amine (4b) and 4-{5-[(2-Methoxyphenyl)amino]-1,3,4-oxadiazol-2-yl} phenol (4c) showed maximum antiproliferative activity among the series with a mean growth percents (GPs) of 45.20 and 56.73, respectively. The compound 4b showed significant percent growth inhibitions (GIs) on nearly 47 cancer cell lines and were found to have higher sensitivity towards HL-60(TB), MDA-MB-435, OVCAR-3, and K-562 with percent GIs (GIs) of 109.62, 105.90, 91.94, and 88.30, respectively. Similarly the compound, 4c showed significant percent GIs on nearly 42 cancer cell lines and were found to have higher sensitivity towards UO-31, MDA-MB-435, KM12, and K-562 with %GIs of 84.31, 80.52, 78.65, and 77.06, respectively. Both the compounds 4b and 4c showed better antiproliferative activity than the standard drug Imatinib while the antiproliferative activity of compound 4b was found to be nearly comparable to the standard drug 5-flurouracil (5-FU). The antiproliferative activity of five compounds (4o-s) was tested against the breast cancer cell lines (MCF-7 and MDA-MB-231) as per Sulforhodamine B assay (SRB assay). N-{[5-(4-Methoxyphenyl)-1,3,4-oxadiazol-2-yl]methyl}-4-methylaniline (4p) was found to have significant antiproliferative activity against MCF-7 and MDA-MB-231 with GI 50 of 12.9 and 59.3 µM, respectively. Further, the free radical scavenging activity results were significant for the most active compounds, 4b (IC 50 = 21.07 µM) and 4c (IC 50 = 15.58 µM). The docking studies was also carried against tubulin enzyme and the most active compound (4b) showed good interaction with the residues Lys254, Ala250, Cys241, Val318, Ala316, Asn258, and Lys352 present in the hydrophobic cavity of tubulin.
Heliyon, 2023
This study describes synthesis of a new group of triaryl-1,2,4-oxadiazole derivatives and their anticancer activities. The target compounds were prepared from reaction of different imines and 4-substituted benzohydroxyiminoyl chlorides. All the synthesized compounds were screened for antiproliferative activities against MCF7 and K562 cell lines using MTT assay at 50-lM concentration. Four compounds that showed more than 50 % cytotoxicity were selected for determination of IC 50. Out of these, 6c-1y showed remarkable inhibitory cytotoxicity activity against MCF7 and K562 cell lines with IC 50 6.50 and 21.66 lM, respectively. A molecular modeling study where 6c-1y was docked in the binding site of COX-2 showed a 2.3-Å hydrogen bond forming via hydroxyl group of Ser516 residue and oxygen of central oxadiazole ring and triaryl moiety of 6c-1y oriented toward the hydrophobic pockets of COX-2. Our data indicate that these derivatives may present promising chemotherapeutic agents, possibly targeting COX-2 pathway.
Synthesis, molecular docking study, and anticancer activity of triaryl-1,2,4-oxadiazole
Medicinal Chemistry Research, 2013
This study describes synthesis of a new group of triaryl-1,2,4-oxadiazole derivatives and their anticancer activities. The target compounds were prepared from reaction of different imines and 4-substituted benzohydroxyiminoyl chlorides. All the synthesized compounds were screened for antiproliferative activities against MCF7 and K562 cell lines using MTT assay at 50-lM concentration. Four compounds that showed more than 50 % cytotoxicity were selected for determination of IC 50. Out of these, 6c-1y showed remarkable inhibitory cytotoxicity activity against MCF7 and K562 cell lines with IC 50 6.50 and 21.66 lM, respectively. A molecular modeling study where 6c-1y was docked in the binding site of COX-2 showed a 2.3-Å hydrogen bond forming via hydroxyl group of Ser516 residue and oxygen of central oxadiazole ring and triaryl moiety of 6c-1y oriented toward the hydrophobic pockets of COX-2. Our data indicate that these derivatives may present promising chemotherapeutic agents, possibly targeting COX-2 pathway.
Journal of the Turkish Chemical Society, Section A: Chemistry, 2020
In this work, synthesis of novel 1,3,4-oxadiazole derivatives were reported. Good molecular properties profile was predicted for the target compounds. In drug likeness prediction, compound 4b and 8b possess the highest score of 0.31 and 0.33, respectively. Since the compounds have good bioactivity scores as kinase inhibitor, possible interactions of compounds with VEGFR-2 kinase and probable binding conformations were evaluated by molecular docking. All compounds formed hydrogen bonding interactions with Asp1046 amino acid of key residues.
Cytotechnology, 2016
The oxadiazole moiety is known for its anticancer activity through its antiangiogenic and mitostatic potential. Taking this as a cue, the present study was designed to investigate the anti-cancer potential of selected oxadiazole derivatives. Twelve 1,3,4-oxadiazole derivatives (AMK OX-1 to AMK OX-12) were synthesized and were tested for IC50 values through brine shrimp lethality assay and MTT assay on HeLa and A549 cell lines. Four compounds, AMK OX-8, 9, 11 and 12 showed potential cytotoxicity activity with low IC50 value. These compounds produced considerable cytotoxic effect on Hep-2 and A549 cancer cell lines. However, they were found to be comparatively safer to normal cell lines, viz., V-79 cell lines than to the tested cancer cell lines, such as HeLa, A 549, and Hep2 cell lines. The mechanism of cytotoxicity was evaluated through nuclear staining and DNA ladder assay. Although DNA ladder assay showed DNA fragmentation (apoptotic phenomenon) in Hep-2 cells treated with only AM...
Binding mode of compounds, 4a & 4c with EGFR tyrosine kinase active site Among a series of ten, 2-(4-chlorophrnyl)-5-aryl-1,3,4-oxadiazole analogs, 4c showed maximum activity on various cancer cell lines, with average growth percent of 95.37%. The molecular docking studies for the compounds 4a & 4c showed that the residue Cys797 is present near to the para substitution of phenyl group while the five member oxadiazole ring of ligands was lying near to Leu792 and Met 793 of EGFR tyrosine kinase active site.
Synthesis and Anticancer Evaluation of New 1,3,4-Oxadiazole Derivatives
Pharmaceuticals
In order to develop novel chemotherapeutic agents with potent anticancer activities, a series of new 2,5-diaryl/heteroaryl-1,3,4-oxadiazoles were designed and synthesized. The structures of the new compounds were established using elemental analyses, IR and NMR spectral data. The compounds were evaluated for their anticancer potential on two standardized human cell lines, HT-29 (colon adenocarcinoma) and MDA-MB-231 (breast adenocarcinoma). Cytotoxicity was measured by MTS assay, while cell cycle arrest and apoptosis assays were conducted using a flow cytometer, the results showing that the cell line MDA-MB-231 is more sensitive to the compounds’ action. The results of the predictive studies using the PASS application and the structural similarity analysis indicated STAT3 and miR-21 as the most probable pharmacological targets for the new compounds. The promising effect of compound 3e, 2-[2-(phenylsulfanylmethyl)phenyl]-5-(4-pyridyl)-1,3,4-oxadiazole, especially on the MDA-MB-231 cel...