Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
Date (from‐to) : 2016/04 -2019/03
Author : ETANI TOSHIKI; TAKAHASHI satoru; SUZUKI takayoshi
The CRPC cell lines, 22Rv1, PC3, and PCai1CS, were treated with NCL1, and LSD1 expression and cell viability were assessed. CRPC cells showed strong LSD1 expression, and cell viability was decreased by NCL1 in a dose-dependent manner. In western blotting and flow cytometry, NCL1 also dose-dependently induced caspase-dependent apoptosis. In addition, stimulation of autophagy was observed in NCL1-treated 22Rv1 cells by transmission electron microscopy and LysoTracker analysis. In ex vivo analysis, castrated nude mice were injected subcutaneously with PCai1 cells and intraperitoneally with NCL1. Tumor volume was found to be reduced with no adverse effects in NCL1-treated mice compared with controls. Finally, immunohistochemical analysis using consecutive human specimens in pre- and post-androgen deprivation therapy demonstrated that LSD1 expression levels in CRPC were very high, and identical to levels observed in previously examined prostate biopsy specimens.