EMBO Press is an editorially independent publishing platform for the development of EMBO scientific publications.

A series of novel quinazolinone derivatives (2–13) was synthesized and examined for their cytotoxicity to HepG2, MCF-7, and Caco-2 in an MTT assay. Among these derivatives, compounds 4 and 9 exhibited significant cytotoxic activity against Caco-2, HepG2, and MCF-7 cancer cells. Compound 4 had more significant inhibitory effects than compound 9 on Caco-2, HepG2, and MCF-7 cell lines, with IC₅₀ values of 23.31 ± 0.09, 53.29 ± 0.25, and 72.22 ± 0.14µM, respectively. The AKT pathway is one of human cancer’s most often deregulated signals. AKT is also overexpressed in human cancers such as glioma, lung, breast, ovarian, gastric, and pancreas. A molecular docking study was performed to analyze the inhibitory action of newly synthetic quinazolinone derivatives against Homo sapiens AKT1 protein. Molecular docking simulations were found to be in accordance with in vitro studies, and hence supported the biological activity. The results suggested that compounds 4 and 9 could be used as drug candidates for cancer therapy via its potential inhibition of AKT1 as described by docking study.

Egyptian propolis is a powerful antioxidant and free radical scavenger produced by bees. The current study was designed to characterize Egyptian propolis, investigate its anticancer effect in vitro and its protective role against methotrexate (MTX) toxicity in Ehrlich ascites carcinoma (EAC) experimental model. Our results revealed a high content of total phenolics, flavonoids and dihydroflavonols in propolis ethanolic extract (PEE). PEE prompted cytotoxic effects in cancer cell lines and antitumor effects against EAC mice model by reducing tumor volume, count of viable tumor cells with a significant elevation in the life span as well as the mean survival time of mice. The hepatic and renal biochemical and toxicity parameters of EAC-bearing mice treated with MTX were improved by PEE. Also, it elevates the expression of Bax, caspase-3 and cytochrome-C and reduces the Bcl₂ expression in EAC cells. Moreover, PEE with MTX induced cell cycle arrest at the G0/G1 phase. Interestingly, the combination of PEE with MTX showed potent apoptosis as shown by DNA fragmentation gel, comet assay and dihydrofolate reductase level (DHFR). These findings demonstrate that Egyptian propolis extract had high chemical diversity and different antioxidant effects. Also, it optimizes the antitumor potential of MTX and declined its toxic effects.