---

Background & objectives: Prostate cancer is one the most common cancer in men whose incidence is increasing in many countries. According to the studies, decreased expression of miR-143 has been reported in prostate cancer. In this study, we replaced miRNA-143 in prostate cancer cells by vector based miRNA-143 and evaluated its inhibitory effects on migration of prostate cancer cells (PC3).
Methods: MTT assay was performed to reach an inhibitory concentration of Genticin antibiotic (G418 (in PC3 cells. Then, miRNA-143 vector was transfected into PC3 cells via JetPEI transfection reagent. The transfected cells were selected by G418 antibiotic according to a 2-week treatment with IC50 concentration. Then, the expression level of miRNA-143 was measured by qRT-PCR method. To evaluate the effect of miRNA-143 in inhibition of migration, scratch wound healing assay was performed.
Results: Results of MTT assay showed the IC50 level of G418 on PC3 cells was obtained to be 141.9 μg / ml. The results of qRT-PCR indicated increased expression of miRNA-143 in PC3 cells transfected with miRNA-143 compared to control cells. Finally, the results of wound healing assay showed migration reduction in transfected cells compared with control cells (empty vector).
Conclusion: The results showed that miRNA-143 play an important role in cell migration during prostate cancer metastasis, and it can be a good candidate for molecular treatments.

---

Background & objectives: Cancer is the leading cause of death worldwide. In this study, the cytotoxic effect of hydroalcoholic extract of Colutea persica leaf and its synergic effect with doxorubicin were investigated on MCF-7, LNCaP and SKM (as control) cell lines.
Methods: Hydroalcoholic leaf extract of Colutea persica was prepared using maceration method and ethanol 70%. Breast cancer (MCF7), prostate (LNCaP) and fibroblast (SKM) cell lines were cultured in microplates (96 wells) and exposed to various concentrations (10, 7.5, 5, 2.5, 1.25, 0.625, 0.312 and 0.156 mg/ml) of plant extract and doxorubicin (20, 80, 320 and 640 nM) solution. The synergistic effect of 20 nanomol of drug and 0.156 mg / ml of the plant extract was investigated. MTT assay was employed to evaluate the cytotoxic effects of the extract on cell lines at different time intervals (24, 48 and 72 hours). Staining with annexin V and propidium iodide (PI) was used to identify different types of cell death either necrosis or apoptosis.
Results: The plant extracts had cytotoxic effect and cell viability rate was lower than fibroblasts. At different times, the concentration of 10 mg /ml of the extract showed the most growth inhibition of breast and prostate cell lines. The combination effect of plant extract with doxorubicin on cells was not significant (p<0.01). The Annexin V/PI flow cytometry results showed that the percentage of initial apoptosis, delayed apoptosis and necrosis in treated cells increased compared to untreated cell.
Conclusion: Hydroalcoholic extract of Colutea persica leaf inhibits the growth of cancer cells and induce apoptosis in breast and prostate cancer cells.