Abstract
Background: Nowadays the use of plant-derived products has been extensively examined in the treatment
of many types of gastrointestinal cancers such as hepatocarcinoma and colon cancer. Urtica dioica is a traditional
herb that has many pharmacological effects and wildly used as a therapeutic agent in cancer. Herein, we have
evaluated the effects of the different concentrations of Methanolic Extract of Urtica dioica (MEUD) on viability,
death pattern, and expression of the apoptosis-related gene in normal Human Dermal Fibroblast (HDF), hepatocarcinoma
cell lines (HepG2) and colon-cancer cell line (HCT116).
Methods: A high-performance liquid chromatography method was developed to simultaneously separate 3 phenolic
acids in MEUD. HepG2 and HCT116 cell lines as well as HDF normal cell line were cultured in suitable media.
After 24 and 48h, in the cultured cell with different concentrations of MEUD, cells viability was assessed by MTT
assay, and apoptosis was also evaluated at the cellular level by Annexin V/PI flow cytometry analyzing and AO/EB
staining. BCL2 and BAX gene expressions were assessed by TaqMan real-time PCR assay.
Results: MEUD showed antiproliferative effects on HepG2 and HTC116 cells after 48h with an IC50 value of about
410 and 420μg/ml, respectively (P < 0.001). Apoptotic cells were observed in HepG2 and HTC116 cells but not in
HDF. Furthermore, the increased level of BAX/BCL-2 ratio was observed in HepG2 and HTC116 cells under the
treatment of different concentrations of MEUD.
Conclusion: The MEUD may influence hepatocarcinoma and colon-cancer cell lines at specific doses and change
their proliferation rate by changing the expression of BAX and BCL2.
Keywords:
Cancer therapy, herbal medicine, Urtica dioica, hepatocarcinoma, colon cancer, MTT assay.
Graphical Abstract
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