Sterically stabilizedliposome- encapsulated IPA-3 (SSL-IPA-3) significantly inhibits prostate tumor xenograft growth in vivo. (A)Pictures of athymic nude mice bearing PC-3 cell tumor xenografts and treated with vehicle (DMSO), empty liposomes, IPA-3or liposome encapsulated IPA-3 (SSL-IPA-3). (B)Histogram showing the weight of PC-3 cell tumor xenografts collected from athymic nude mice treated with vehicle (DMSO), empty liposomes, IPA-3or liposome encapsulated IPA-3 on day 25 after tumor implantation and day 18 after the start of treatments (n = 5-6). (C)Histogram showing the volume of PC-3 cell tumor xenografts on day 7, 14, 21 and 25 after implantation in athymic nude mice treated with vehicle (DMSO), empty liposomes, IPA-3or liposome encapsulated IPA-3 as measured using calipers (n = 5-6). (D)Histogram showing the body weight of the PC-3 cell tumor bearing athymic nude mice on day 25 after tumor implantation and day 18 after treatment with vehicle (DMSO), empty liposomes, IPA-3or liposome encapsulated IPA-3. Data are presented as the mean ± SEM; #p < 0.01.