Abstract
Hypericum perforatum L. is one of the best-studied and consumed worldwide medicinal plants and several reports described various biological activities, including sedative, anti-inflammatory, anticancer, and antidepressant. H. perforatum, hypericin, and hyperforin can regulate the expression of CYP3A4 and, to our knowledge, studies are focused on in vivo and clinical evaluations and, there is no an in vitro study comparing CYP3A4 expression between hepatic cells. This study evaluated the effects of H. perforatum hydroalcoholic extract, hypericin, and hyperforin in cellular viability and CYP3A4 expression in HepG2, WRL-68, and HepaRG cells.
It was found that, in general, the cytotoxicity promoted by H. perforatum is similar to that promoted by hyperforin alone, time- and dose dependent and the most sensitive cell line is WRL-68 followed by HepG2 and HepaRG cells. Hypericin did not significantly compromise the cellular viability of cells. Regarding their effects in CYP3A4 expression, hyperforin strongly induced CYP3A4 mRNA expression in WRL-68 and HepG2, while in HepaRG it remains unaltered. Hypericin increased CYP3A4 levels in WRL-68 and HepaRG and diminished it in HepG2 cells. H. perforatum induced or decreased CYP3A4 mRNA expression cell- and time-dependent. Computational docking studies showed a lower binding energy between hypericin or hyperforin and its four major metabolites and the catalytic center of the CYP3A4 protein in comparison with ketoconazole.
Overall, depending on the cell line, concentration and time of incubation, H. perforatum, hypericin and hyperforin, can exert distinct effects both in cytotoxicity and in CYP3A4 mRNA expression. The results highlighted that at least the continuous and high-dose usage of H. perforatum should be carefully done and monitored, especially in combination with CYP3A4 metabolized drugs.
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Abbreviations
- CYP:
-
cytochrome P450
- CYP3A4:
-
CYP monooxygenase 3A4
- CV :
-
cellular viability relative to controls
- MTT assay:
-
3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide assay
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Acknowledgments
The authors acknowledge the Programa Operacional Regional do Centro 20072013 “Mais Centro”- Project “Therapeutic drug monitoring on age related diseases” (CENTRO-07-ST24-FEDER-002012), the Program COMPETE and the Portuguese Foundation for Science and Technology (PEst-OE/SAU/UI0709/2014).
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Ana Martinho and Sara M. Silva contributed equally to this paper.
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Martinho, A., Silva, S.M., Garcia, S. et al. Effects of Hypericum perforatum hydroalcoholic extract, hypericin, and hyperforin on cytotoxicity and CYP3A4 mRNA expression in hepatic cell lines: a comparative study. Med Chem Res 25, 2999–3010 (2016). https://doi.org/10.1007/s00044-016-1702-z
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DOI: https://doi.org/10.1007/s00044-016-1702-z