Unravelling the anticancer potency of 1,2,4-triazole- N -arylamide hybrids through inhibition of STAT3: synthesis and in

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ORIGINAL ARTICLE

Unravelling the anticancer potency of 1,2,4‑triazole‑N‑arylamide hybrids through inhibition of STAT3: synthesis and in silico mechanistic studies Abdallah Turky1 · Ashraf H. Bayoumi1 · Farag F. Sherbiny1,2 · Khaled El‑Adl3,4 · Hamada S. Abulkhair1,5  Received: 6 July 2020 / Accepted: 6 August 2020 © Springer Nature Switzerland AG 2020

Abstract  The discovery of potent STAT3 inhibitors has gained noteworthy impetus in the last decade. In line with this trend, considering the proven biological importance of 1,2,4-triazoles, herein, we are reporting the design, synthesis, pharmacokinetic profiles, and in vitro anticancer activity of novel C3-linked 1,2,4-triazole-N-arylamide hybrids and their in silico proposed mechanism of action via inhibition of STAT3. The 1,2,4-triazole scaffold was selected as a privilege ring system that is embedded in core structures of a variety of anticancer drugs which are either in clinical use or still under clinical trials. The designed 1,2,4-triazole derivatives were synthesized by linking the triazole-thione moiety through amide hydrophilic linkers with diverse lipophilic fragments. In silico study to predict cytotoxicity of the new hybrids against different kinds of human cancer cell lines as well as the non-tumor cells was conducted. The multidrug-resistant human breast adenocarcinoma cells (MDA-MB-231) was found most susceptible to the cytotoxic effect of synthesized compounds and hence were selected to evaluate the in vitro anticancer activity. Four of the designed derivatives showed promising cytotoxicity effects against selected cancer cells, among which compound 12 showed the highest potency ­(IC50 = 3.61 µM), followed by 21 which displayed I­ C50 value of 3.93 µM. Also, compounds 14 and 23 revealed equipotent activity with the reference cytotoxic agent doxorubicin. To reinforce these observations, the obtained data of in vitro cytotoxicity have been validated in terms of ligand–protein interaction and new compounds were analyzed for ADMET properties to evaluate their potential to build up as good drug candidates. This study led us to identify two novel C3-linked 1,2,4-triazole-N-arylamide hybrids of interesting antiproliferative potentials as probable lead inhibitors of STAT3 with promising pharmacokinetic profiles.

Electronic supplementary material  The online version of this article (https​://doi.org/10.1007/s1103​0-020-10131​-0) contains supplementary material, which is available to authorized users. * Hamada S. Abulkhair [email protected]; [email protected] 1



Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Nasr City, Cairo 11884, Egypt

2



Pharmaceutical Organic Chemistry Department, College of Pharmacy, Misr University for Science and Technology (MUST), 6th October City, Egypt

3

Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt

4

Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Heliopolis University for Sustainable Development, Cairo,