Abstract
Background: Aesculetin (AE), a natural coumarin derivative found in traditional medicinal herbs, has a variety of pharmacological effects. However, the role of AE and its molecular mechanisms of action on bladder cancer remains undefined.
Objective: The study aims to explore the anti-tumor effects of AE on bladder cancer cells and the associated molecular mechanisms.
Methods: We performed a Cell Counting Kit-8 assay to examine the inhibitory effects of AE on 5637 and T24 cells. The anti-tumor effects of AE on 5637 cells were evaluated by performing colony formation, living/dead cell staining, apoptosis, cell cycle, migration and invasion assays. The expression levels of related proteins were determined using western blotting.
Results: The viability of 5637 and T24 cells was decreased by AE. AE significantly inhibited colony formation, arrested the cell cycle at the G0/G1 phase, decreased migration and invasion, decreased the mitochondrial membrane potential and increased apoptosis in 5637 cells. Western blotting results showed the release of cytochrome C from mitochondria; the activation of caspase-9 and caspase-3; decrease in CDK4, CCND1, MMP2 and MMP9 levels and an increase in the BAX/BCL-2 protein ratio after treatment with AE. AE also downregulated the levels of p-ERK and p- MEK proteins. Pre-treatment with U0126 significantly enhanced the anti-tumor effects of AE.
Conclusions: AE inhibited the proliferation and induced the apoptosis of bladder cancer cells through the MEK/ERK pathway. These findings provide possible therapeutic strategies for bladder cancer.
Keywords: Bladder cancer, aesculetin, MEK/ERK, proliferation, apoptosis, migration and invasion.
[http://dx.doi.org/10.3322/caac.21492] [PMID: 30207593]
[http://dx.doi.org/10.1016/j.eururo.2019.08.016] [PMID: 31443960]
[http://dx.doi.org/10.1080/17512433.2020.1738218] [PMID: 32154753]
[http://dx.doi.org/10.1016/j.semcancer.2016.08.006] [PMID: 27565447]
[http://dx.doi.org/10.3390/ijms21155518] [PMID: 32752252]
[http://dx.doi.org/10.1016/j.bbrc.2018.04.195] [PMID: 29705703]
[http://dx.doi.org/10.3390/ijms21228581] [PMID: 33203061]
[http://dx.doi.org/10.1007/s13277-015-4286-1] [PMID: 26508031]
[http://dx.doi.org/10.1016/j.ejphar.2017.08.025] [PMID: 28847482]
[http://dx.doi.org/10.4149/gpb_2016024] [PMID: 27901471]
[http://dx.doi.org/10.3233/CBM-181764] [PMID: 30689555]
[http://dx.doi.org/10.1186/s12943-016-0550-2] [PMID: 27756327]
[http://dx.doi.org/10.1139/cjpp-2016-0548] [PMID: 28177662]
[http://dx.doi.org/10.1016/j.cbi.2018.08.015] [PMID: 30171828]
[http://dx.doi.org/10.2174/1871520620999201110191459] [PMID: 33176665]
[http://dx.doi.org/10.2174/1871520620999201124215511] [PMID: 33238849]
[PMID: 34477532]
[http://dx.doi.org/10.3389/fonc.2020.01735] [PMID: 33014857]
[PMID: 34249438]
[http://dx.doi.org/10.1200/JCO.18.00537] [PMID: 30433852]
[PMID: 33269718]
[http://dx.doi.org/10.1038/s41568-020-0263-0] [PMID: 32488200]
[http://dx.doi.org/10.1080/15384101.2019.1644913] [PMID: 31322047]
[http://dx.doi.org/10.1016/j.gene.2020.145370] [PMID: 33346097]
[http://dx.doi.org/10.18388/abp.2020_5463] [PMID: 33728889]
[http://dx.doi.org/10.1007/s00784-017-2090-6] [PMID: 28238093]
[http://dx.doi.org/10.1590/1414-431x20144074] [PMID: 25517918]
[http://dx.doi.org/10.1186/s11671-019-3044-5] [PMID: 31227943]
[http://dx.doi.org/10.3390/biom10081159] [PMID: 32784711]
[http://dx.doi.org/10.1016/j.bbamcr.2017.04.015] [PMID: 28456643]
[http://dx.doi.org/10.3390/ijms21249739] [PMID: 33419373]
[http://dx.doi.org/10.3390/md15080238] [PMID: 28767067]
[http://dx.doi.org/10.1016/j.virol.2016.12.011] [PMID: 28526201]
[http://dx.doi.org/10.1002/jcp.22650] [PMID: 21935933]
[http://dx.doi.org/10.1038/nrd4281] [PMID: 25435214]
[http://dx.doi.org/10.1186/s13046-016-0346-7] [PMID: 27084680]
[http://dx.doi.org/10.7314/APJCP.2012.13.4.1657] [PMID: 22799384]
[http://dx.doi.org/10.1038/cdd.2017.176] [PMID: 29125598]