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. Author manuscript; available in PMC: 2010 Feb 22.
Published in final edited form as: Prostate. 2008 Dec 1;68(16):1773–1789. doi: 10.1002/pros.20845

Fig. 1.

Fig. 1

Effect of quercetin on the viability of prostate cancer cells. A: Normal prostate epithelial cells, (B) LNCaP, (C)DU-145, and (D) PC-3 prostate cancer cells were treated with increasing concentrations of quercetin for 24 hr and viability was determined by trypan blue vital dye exclusion. Viability was confirmed by a proprietary tetrazolium dye method using absorbance at 450 nm as described in the text: (E) normal prostate epithelial cells, (F) LNCaP, and (G) PC-3 cells. Values are mean ± SE of six experiments; *P < 0.05 and **P < 0.001 compared to treatment with dihydroquercetin which did not affect the viability of any of the cells in this study. [Color figure can be viewed in the online issue, which is available at http://www.interscience.wiley.com.]