Abstract
Background: Hyperoside is a flavonol glycoside isolated from Hypericum perforatum L. that has inhibitory effects on cancer cells; however, its effects on prostate cancer (PCa) remain unclear. Therefore, we studied the anti-PCa effects of hyperoside and its underlying mechanisms in vitro and in vivo.
Aim: This study aimed to explore the mechanism of hyperoside in anti-PCa.
Methods: 3-(4,5-Dimethyl-2-Thiazolyl)-2,5-Diphenyl Tetrazolium Bromide (MTT), transwell, and flow cytometry assays were used to detect PCa cell growth, invasion, and cell apoptosis. Immunoblot analysis, immunofluorescence, immunoprecipitation, and quantitative real-time PCR (qRT-PCR) were used to analyze the antitumor mechanism of hyperoside.
Results: Hyperoside inhibited PCa cell growth, invasion, and cell cycle and induced cell apoptosis. Furthermore, RING finger protein 8 (RNF8), an E3 ligase that assembles K63 polyubiquitination chains, was predicted to be a direct target of hyperoside and was downregulated by hyperoside. Downregulation of RNF8 by hyperoside impeded the nuclear translocation of β-catenin and disrupted the Wnt/β-catenin pathway, which reduced the expression of the target genes c-myc, cyclin D1, and programmed death ligand 1 (PD-L1). Decreased PD-L1 levels contributed to induced immunity in Jurkat cells in vitro. Finally, in vivo studies demonstrated that hyperoside significantly reduced tumor size, inhibited PD-L1 and RNF8 expression, and induced apoptosis in tumor tissues of a subcutaneous mouse model.
Conclusion: Hyperoside exerts its anti-PCa effect by reducing RNF8 protein, inhibiting nuclear translocation of β-catenin, and disrupting the Wnt/β-catenin pathway, in turn reducing the expression of PD-L1 and improving Jurkat cell immunity.
Graphical Abstract
[http://dx.doi.org/10.3322/caac.21660] [PMID: 33538338]
[http://dx.doi.org/10.1016/S0140-6736(21)00950-8] [PMID: 34370973]
[http://dx.doi.org/10.4103/aja.aja_19_19] [PMID: 30950412]
[http://dx.doi.org/10.1186/s13045-020-00978-z] [PMID: 33115529]
[http://dx.doi.org/10.1158/0008-5472.CAN-19-2948] [PMID: 32066566]
[http://dx.doi.org/10.1016/j.ctrv.2020.102057] [PMID: 32574991]
[http://dx.doi.org/10.1016/j.freeradbiomed.2016.10.272]
[http://dx.doi.org/10.1002/cam4.2630] [PMID: 31646760]
[http://dx.doi.org/10.1038/nri2817] [PMID: 20651745]
[http://dx.doi.org/10.1016/j.coi.2011.12.009] [PMID: 22236695]
[http://dx.doi.org/10.1158/2326-6066.CIR-20-0304] [PMID: 32873605]
[http://dx.doi.org/10.1186/s12943-018-0928-4] [PMID: 30646912]
[http://dx.doi.org/10.1016/j.ymthe.2021.04.029] [PMID: 33932597]
[http://dx.doi.org/10.1016/j.prp.2021.153738] [PMID: 34922209]
[http://dx.doi.org/10.1158/1078-0432.CCR-15-2042] [PMID: 26573597]
[http://dx.doi.org/10.3389/fmolb.2022.878353] [PMID: 35836932]
[http://dx.doi.org/10.1007/s11418-018-1212-z] [PMID: 29651698]
[http://dx.doi.org/10.3390/ijms18071400] [PMID: 28665310]
[http://dx.doi.org/10.1248/bpb.b22-00682] [PMID: 37005301]
[http://dx.doi.org/10.7150/ijbs.31972] [PMID: 31182912]
[http://dx.doi.org/10.3390/cancers14235963] [PMID: 36497444]
[http://dx.doi.org/10.3389/fphar.2017.00075] [PMID: 28289384]
[http://dx.doi.org/10.1016/j.phytol.2021.09.011]
[http://dx.doi.org/10.3390/molecules27093009] [PMID: 35566359]
[http://dx.doi.org/10.1021/jf049571r] [PMID: 15291471]
[http://dx.doi.org/10.1016/j.biopha.2016.11.096] [PMID: 27930981]
[http://dx.doi.org/10.1016/j.biopha.2020.110504] [PMID: 32768978]
[http://dx.doi.org/10.1016/j.bcp.2023.115724] [PMID: 37524205]
[http://dx.doi.org/10.1016/j.phymed.2020.153387] [PMID: 33130473]
[http://dx.doi.org/10.1016/j.cbi.2018.08.013] [PMID: 30125551]
[http://dx.doi.org/10.3390/ijms20235832] [PMID: 31757050]
[http://dx.doi.org/10.3390/ijms18020322] [PMID: 28165389]
[http://dx.doi.org/10.1002/ptr.7478] [PMID: 35561084]
[http://dx.doi.org/10.1186/s12935-019-0953-4] [PMID: 31516392]
[http://dx.doi.org/10.3390/ijms21010131] [PMID: 31878204]
[http://dx.doi.org/10.1016/j.phymed.2019.153138] [PMID: 31881478]
[http://dx.doi.org/10.2147/CMAR.S270544] [PMID: 33235505]
[http://dx.doi.org/10.3892/mmr.2017.6710] [PMID: 29067453]
[http://dx.doi.org/10.1016/j.biopha.2016.07.029] [PMID: 27459118]
[http://dx.doi.org/10.3892/ijo.2017.3873] [PMID: 28197632]
[http://dx.doi.org/10.1186/s13062-022-00331-z] [PMID: 35831895]
[http://dx.doi.org/10.1016/j.celrep.2022.110851] [PMID: 35649359]
[http://dx.doi.org/10.1016/j.cell.2007.09.040] [PMID: 18001824]
[http://dx.doi.org/10.7150/ijbs.44119] [PMID: 32549753]
[http://dx.doi.org/10.1158/1541-7786.MCR-19-1211] [PMID: 32753472]
[http://dx.doi.org/10.1016/j.celrep.2021.109854] [PMID: 34686341]
[http://dx.doi.org/10.1177/25151355231192043] [PMID: 37662491]
[http://dx.doi.org/10.1038/s41419-022-04787-9] [PMID: 35428760]
[http://dx.doi.org/10.1631/jzus.B2000497] [PMID: 33719224]
[http://dx.doi.org/10.1038/s41467-017-01333-6] [PMID: 29097665]
[http://dx.doi.org/10.1038/nrurol.2017.144] [PMID: 28895566]
[http://dx.doi.org/10.1016/j.mce.2017.02.008] [PMID: 28189566]
[http://dx.doi.org/10.1016/j.jep.2023.116548] [PMID: 37100264]
[http://dx.doi.org/10.1126/science.281.5382.1509] [PMID: 9727977]
[http://dx.doi.org/10.1038/18884] [PMID: 10201372]
[http://dx.doi.org/10.1080/1061186X.2019.1687710] [PMID: 31865764]
[http://dx.doi.org/10.1002/eji.1830120506] [PMID: 6980126]
[http://dx.doi.org/10.15171/apb.2015.089] [PMID: 26793612]
[http://dx.doi.org/10.1016/j.tips.2018.03.008] [PMID: 29678298]
[http://dx.doi.org/10.1038/s41392-021-00701-5] [PMID: 34456337]
[http://dx.doi.org/10.1038/s41467-021-21258-5] [PMID: 33579943]
[http://dx.doi.org/10.1038/s41467-018-04620-y] [PMID: 29891922]
[http://dx.doi.org/10.1016/j.molcel.2016.08.009] [PMID: 27618486]
[http://dx.doi.org/10.1186/s13045-020-00990-3] [PMID: 33276800]
[http://dx.doi.org/10.1016/j.actbio.2022.08.024] [PMID: 36028199]
[http://dx.doi.org/10.3390/cells9092051] [PMID: 32911806]
[http://dx.doi.org/10.1038/ni.3641] [PMID: 27992402]
[http://dx.doi.org/10.1038/s41391-021-00340-5] [PMID: 33820953]
[http://dx.doi.org/10.1186/s12885-020-07058-y] [PMID: 32552802]
[http://dx.doi.org/10.1002/eji.201847603] [PMID: 30466171]
[http://dx.doi.org/10.1038/s41420-022-01204-0] [PMID: 36202787]
[http://dx.doi.org/10.1038/s41419-020-2511-3] [PMID: 32366856]
[http://dx.doi.org/10.2147/OTT.S212666] [PMID: 31849495]