Fujita Tetsuo, Satoh Takefumi, Timme Terry L, Hirayama Takahiro, Zhu Julie X, Kusaka Nobuyuki, Naruishi Koji, Yang Guang, Goltsov Alexei, Wang Jianxiang, Vlachaki Maria T, Teh Bin S, Brian Butler E, Thompson Timothy C
Scott Department of Urology, Baylor College of Medicine, Houston, TX.
Scott Department of Urology, Baylor College of Medicine, Houston, TX; Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX.
Urol Oncol. 2014 Feb;32(2):92-100. doi: 10.1016/j.urolonc.2012.10.007. Epub 2013 Feb 20.
The objectives of this study are to explore the potential benefits of combining AdGlipr1 (or AdGLIPR1) gene therapy with radiotherapy using subcutaneous prostate and bladder cancer models.
Combination adenoviral vector-mediated gene therapy and radiotherapy were applied to 178-2 BMA and TSU-Pr1 cells in vitro and colony formation and apoptosis were analyzed. In addition, combination therapies were administered to mice bearing subcutaneous 178-2 BMA and TSU-Pr1 tumors, and tumor growth suppression and survival extension were compared with the monotherapies (AdGlipr1/AdGLIPR1 and radiotherapy) or control vector Adv/CMV/βgal, as well as single-cycle treatment with 2-cycle treatment.
Combination treatment significantly suppressed colony formation and increased apoptosis in vitro. In vivo, combination therapy produced significant 178-2 BMA and TSU-Pr1 tumor growth suppression and survival extension compared with the monotherapies or the control. Further tumor growth suppression and survival extension were observed after 2 cycles of the combination treatment.
Combining AdGlipr1 (AdGLIPR1) with radiotherapy may achieve additive or synergistic tumor control in selected prostate and bladder tumors, and additional therapeutic effects may result with repeated treatment cycles.
本研究的目的是利用皮下前列腺癌和膀胱癌模型探索联合AdGlipr1(或AdGLIPR1)基因治疗与放射治疗的潜在益处。
将腺病毒载体介导的基因治疗与放射治疗联合应用于体外培养的178 - 2 BMA和TSU - Pr1细胞,并分析集落形成和细胞凋亡情况。此外,对携带皮下178 - 2 BMA和TSU - Pr1肿瘤的小鼠进行联合治疗,并将肿瘤生长抑制和生存期延长情况与单一疗法(AdGlipr1/AdGLIPR1和放射治疗)或对照载体Adv/CMV/βgal进行比较,同时比较单周期治疗与两周期治疗。
联合治疗在体外显著抑制集落形成并增加细胞凋亡。在体内,与单一疗法或对照相比,联合治疗显著抑制了178 - 2 BMA和TSU - Pr1肿瘤的生长并延长了生存期。联合治疗两周期后观察到进一步的肿瘤生长抑制和生存期延长。
在选定的前列腺和膀胱肿瘤中,将AdGlipr1(AdGLIPR1)与放射治疗联合应用可能实现相加或协同的肿瘤控制,并且重复治疗周期可能产生额外的治疗效果。