Antitumoral and Antioxidant Potential of Egyptian Propolis Against the PC3 Prostate Cancer Cell Line

  • Salim, Elsayed I (Department of Zoology, Faculty of Science, Tanta University, Research Lab. of Molecular Carcinogenesis) ;
  • Abd El-Magid, Afaf D (Department of Biochemistry & Clinical Chemistry, Moshtohor, Benha University) ;
  • Farara, Khalid M (Department of Clinical Pathology, Faculty of Veterinary Medicine, Moshtohor, Benha University) ;
  • Maria, Dina SM (Department of Zoology, Faculty of Science, Tanta University, Research Lab. of Molecular Carcinogenesis)
  • Published : 2015.12.03


It has been shown previously that nutritional supplements rich in polyphenolic compounds play a significant role in prostate cancer chemoprevention. Propolis is a natural, resinous hive product that has several pharmacological activities including antimicrobial, antioxidant, anti-inflammatory, and antitumoral activities. The aim of this study was to compare the cytotoxic, antioxidant and antitumoral activities of an ethanolic extract of Egyptian propolis (EEP) in vitro with an established chemotherapeutic drug such as doxorubicin (DOX), and the effects of their combination against the PC3 human prostate cancer cell line. Cellular viability and $IC_{50}$ levels with EEP, DOX and their (v/v) combination were detected by sulphorhodamine-B (SRB) assay after incubation of PC3 cells for 72h with different doses (0, 0.01, 0.1, 1, 10 and $100{\mu}g/ml$). Two selected doses of $IC_{50}$ and $IC_{25}$ were applied to cells for 24h for antitumor evaluation assay of treatment compounds. EEP and its (v/v) combination with DOX showed significant antitumor potential besides high antioxidant properties of superoxide dismutase (SOD), total antioxidant capacity (TAC), catalase (CAT), nitric oxide (NO) and reduced glutathione (GSH) levels when compared with the control untreated cells. DNA fragmentation assay and semi quantitative RT-PCR analyses for p53 and Bax genes showed that EEP activated cellular apoptosis and increased the mRNA expression levels more than other treatment. In conclusion, EEP alone or in combination with DOX at both doses used here showed greater antioxidant, antiproliferative and apoptotic effects against the PC3 cell lines as compared to treatment with DOX alone. Therefore, EEP could be considered as a promising candidate for prostate cancer chemotherapy.


Propolis;prostate cancer;PC3 cell line;p53;Bax;oxidative stress;apoptosis


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