RWPE-1,LNCaP, DU145,PC-3and 22RV1 cells were purchased from ATCC (Manassas, VA)in February 2002 and maintained in a humidified atmosphere of 5% CO
2, RPMI 1640 supplemented with 10% fetal bovine serum (FBS) and antibiotics except that RWPE-1 cells were maintained in Keratinocyte-SFM media (Invitrogen, Carlsbad, CA). LAPC-4 was obtained from UCLA and C4-2 was purchased from UroCor (Oklahoma City, OK) in May 2002 as described in our previous publications (21 (
link), 22 (
link)). BPH1 cell line was kindly provided by Dr Long-cheng Li (Department of Urololgy, University of California at San Francisco) in August 2011. These cell lines were authenticated using PromegaPowerPlex® technology and carried out at Genetica® DNA Laboratories (Burlington, NC) in January 2014. Alternol (99.9% purity) was a kind gift from Strand Biotech Co (Shantou, China) and its structural scheme is shown in
Fig 1A. It was dissolved in dimethyl sulfoxide (DMSO) as a 10 mM stock solution. Antibodies for caspase-3, PARP, Bax, Bif-1, Bcl-2, Bcl-x
L and BAD were obtained from Cell Signal (Danvers, MA). Pre-validated small interfering RNAs, Actin antibody, CPT-11, n-acetylcysteine (N-Ac), dihydrolipoic acid (DHLA), MG132, E-64, PD150606 and Bax channel blocker were purchased from Santa Cruz Biotech (Santa Cruz, CA). All the reagents were prepared according to the manufacturer's instruction and used as described in the figure legends. Final concentrations of the solvent did not exceed 0.1% of the culture media. Bax expression construct pCEP4-HA-hBax (23 (
link)) was obtained from Add gene (Cambridge, MA) and the control empty vector was purchased from Invitrogen (Carlsbad, CA). DNA Ladder Detection Kit and Caspase-9 colorimetric activity assay kit were purchased from Millipore (Billerica, MA). Preassembled assay kit for total ROS detection was purchased from Enzo Life Sciences (Farmingdale, NY). Annexin V-FITC Apoptosis Detection kit was purchased from BD PharMingen (San Diego, CA). Mitochondrial membrane potential assay kit with the fluorescent dye 5,5′,6,6′-tetrachloro-1,1′,3,3′-tetraethylbenzimidazolyl carbocyanine iodide (JC-1), Lipofectamine 2000 and RNAiMAX were purchased from Invitrogen (Carlsbad, CA). DAKO LSAB+ System kit was purchased from DAKO USA (Carpinteria, CA).
Tang Y., Chen R., Huang Y., Li G., Huang Y., Chen J., Duan L., Zhu B.T., Thrasher J.B., Zhang X, & Li B. (2014). Natural compound Alternol induces oxidative stress-dependent apoptotic cell death preferentially in prostate cancer cells. Molecular cancer therapeutics, 13(6), 1526-1536.