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Effects of Bee Venom on Activity and Expression of 15-Lipoxygenase-1 in Human HT29 Colon Cancer

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soukhtanloo M., Zare M., Khayatzadeh J., Sadegh Nia H., Mojarad M., Baghbani F., Sargolzaei J., Sadeghian H., Sisakhti M.
Acta Poloniae Pharmaceutica - Drug Research
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2019
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vol. 76
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issue 1
75-82
EN
Colorectal cancer has a high incidence rate with significant mortality and morbidity. The 15-lipoxygenase-1 (15-LOX-1) is a crucial enzyme as well as a tumor suppressor, especially in colon cancer. Bee venom, by the induction of apoptosis, is a promising new anti-cancer agent. Thus, the effects of bee venom on the expression of 15-LOX-1 m-RNA and its activities in the HT-29 cell line have been investigated in the current study. Human HT-29 colon cancer cells were treated with increasing concentrations of bee venom (1.87-30 µg/mL), and cisplatin (5 µg/mL) as the positive control for 24- and 48-hours. Then, cell viability and apoptosis were measured using the MMT assay and flow cytometry, respectively. Enzyme activity and expression was assayed using the kinetic method and real-time PCR, respectively. The results showed that the main content of bee venom was melittin with a retention time of 60 minutes. The IC50 values of bee venom at 24- and 48-hours were 6.01 µg/mL and 4.44 µg/mL, respectively. Expression of 15-LOX-1 in cancer cells treated with bee venom increased (p < 0.0005), as well as the activity of the enzyme in the presence of bee venom (p < 0.01). The current study revealed the apoptotic and cytotoxic effects of bee venom against the human colon cancer HT-29 cell line that was not seen in fibroblast cells. Findings suggest that bee venom may have therapeutic effects against the HT-29 colon cancer cell through the induction of the15-LOX-1 pathway. However, further studies are needed in this regard.
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