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Published on: September 3, 2013
[Inhibitory effect of solanine on prostate cancer cell line PC-3 in vitro]
1Department of Urology, The 5th People's Hospital of Shanghai, Fudan University, Shanghai 200240, China. med_zj@sina.com
Objective:
To investigate the mechanisms of the effects of solanine on human androgen-independent prostate cancer cell line PC-3 in vitro.
Methods:
PC-3 cells were treated with solanine at the concentration of 0, 30, 40 and 50 microg/ml, and the cell activity was measured by CCK-8 at 12, 24 and 48 hours after the treatment. At 24 hours, the cell cycle and apoptosis were detected by flow cytometry and fluorescence microscopy, and the protein expressions of I(kappa)B(alpha) and Bcl-2 determined by Western blot.
Results:
Solanine suppressed the growth of PC-3 cells in a dose- and time-dependent manner in vitro, with significant differences among different concentration and time groups (P < 0.05). The cycle of the PC-3 cells was arrested in the S phase (P < 0.05), with a significantly higher rate of apoptosis in the treated groups than in the controls (P < 0.05). The protein expression of I(kappa)B(alpha) was obviously up-regulated and that of Bcl-2 down-regulated in all the solanine concentration groups.
Conclusion:
Solanine has an anti-prostate cancer effect by inhibiting PC-3 cell proliferation, arresting the S phase, inducing cell apoptosis, up-regulating the protein expression of I(kappa)B(alpha) and down-regulating that of Bcl-2.
Insights
Solanine inhibits prostate cancer cell growth by inducing apoptosis and cell cycle arrest. This natural compound also affects key protein expressions, suggesting therapeutic potential.
Area of Science:
- Pharmacology
- Oncology
- Molecular Biology
Background:
- Prostate cancer remains a leading cause of cancer death in men.
- Androgen-independent prostate cancer (PC-3 cell line) presents treatment challenges.
- Natural compounds are explored for novel anti-cancer therapies.
Purpose of the Study:
- To elucidate the in vitro mechanisms of solanine's effects on the PC-3 prostate cancer cell line.
- To investigate solanine's impact on cell proliferation, cell cycle, apoptosis, and specific protein expressions.
Main Methods:
- PC-3 cells were treated with varying concentrations of solanine (0-50 microg/ml).
- Cell activity was assessed using CCK-8 assay over 48 hours.
- Cell cycle, apoptosis, and protein levels of I(kappa)B(alpha) and Bcl-2 were analyzed via flow cytometry, fluorescence microscopy, and Western blot.
Main Results:
- Solanine demonstrated dose- and time-dependent suppression of PC-3 cell growth (P < 0.05).
- Cell cycle arrest occurred predominantly in the S phase, with significantly increased apoptosis rates in treated cells (P < 0.05).
- Solanine treatment led to increased I(kappa)B(alpha) and decreased Bcl-2 protein expression.
Conclusions:
- Solanine exhibits anti-prostate cancer activity by inhibiting proliferation and inducing S-phase arrest.
- Solanine promotes apoptosis in PC-3 cells.
- The anti-cancer effects are associated with altered expression of I(kappa)B(alpha) and Bcl-2 proteins.
