Moll Jan Matthijs, Teubel Wilma J, Erkens Sigrun E, Jozefzoon-Agai Ashraf, Dits Natasja F, van Rijswijk Angelique, Jenster Guido W, van Weerden Wytske M
Department of Urology, Erasmus Medical Centre (MC), Rotterdam, Netherlands.
Front Oncol. 2022 Jun 13;12:877613. doi: 10.3389/fonc.2022.877613. eCollection 2022.
Treatment of prostate cancer (PCa) has changed considerably in the last decade due to the introduction of novel androgen receptor (AR)-targeted agents (ARTAs) for patients progressing on androgen deprivation therapy (ADT). Preclinical research however still relies heavily on AR-negative cell line models. In order to investigate potential differences in castration-resistant PCa (CRPC) growth, we set out to create a comprehensive panel of ARTA-progressive models from 4 androgen-responsive AR wild-type PCa cell lines and analyzed its androgen response as opposed to its ADT-progressive counterparts. Parallel cultures of VCaP, DuCaP, PC346C, and LAPC4 were established in their respective culture media with steroid-stripped fetal calf serum (FCS) [dextran-coated charcoal-stripped FCS (DCC)] without androgen (ADT) or in DCC plus 1 μM of the ARTAs bicalutamide, OH-flutamide, or RD162 (an enzalutamide/apalutamide analog). Cell growth was monitored and compared to those of parental cell lines. Short-term androgen response was measured using cell proliferation 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. qRT-PCR was performed to assess the mRNA expression of markers for AR signaling, steroidogenesis, glucocorticoid receptor (GR) signaling, epithelial-mesenchymal transition (EMT), and WNT signaling. Out of 35 parallel cultures per cell line, a total of 24, 15, 34, and 16 CRPC sublines emerged for VCaP, DuCaP, PC346C, and LAPC4, respectively. The addition of bicalutamide or OH-flutamide significantly increased CRPC growth compared to ADT or RD162. VCaP, DuCaP, and PC346C CRPC clones retained an AR-responsive phenotype. The expression of AR and subsequent androgen response were completely lost in all LAPC4 CRPC lines. Markers for EMT and WNT signaling were found to be elevated in the resilient PC346C model and CRPC derivatives of VCaP, DuCaP, and LAPC4. Although the resistant phenotype is pluriform between models, it seems consistent within models, regardless of type of ARTA. These data suggest that the progression to and the phenotype of the CRPC state might already be determined early in carcinogenesis.
在过去十年中,由于针对在雄激素剥夺疗法(ADT)中病情进展的患者引入了新型雄激素受体(AR)靶向药物(ARTAs),前列腺癌(PCa)的治疗发生了很大变化。然而,临床前研究仍然严重依赖AR阴性细胞系模型。为了研究去势抵抗性前列腺癌(CRPC)生长的潜在差异,我们着手从4种雄激素反应性AR野生型PCa细胞系创建一组全面的ARTAs进展模型,并分析其雄激素反应,与ADT进展模型进行对比。在含有类固醇去除的胎牛血清(FCS)[葡聚糖包被活性炭去除FCS(DCC)]且无雄激素(ADT)的各自培养基中,或在DCC加1 μM的ARTAs比卡鲁胺、OH-氟他胺或RD162(恩杂鲁胺/阿帕鲁胺类似物)中建立VCaP、DuCaP、PC346C和LAPC4的平行培养物。监测细胞生长并与亲代细胞系进行比较。使用细胞增殖3-(4,5-二甲基噻唑-2-基)-2,5-二苯基四氮唑溴盐(MTT)法测量短期雄激素反应。进行qRT-PCR以评估AR信号、类固醇生成、糖皮质激素受体(GR)信号、上皮-间质转化(EMT)和WNT信号标志物的mRNA表达。每个细胞系的35个平行培养物中,分别为VCaP、DuCaP、PC346C和LAPC4产生了总共24、15、34和16个CRPC亚系。与ADT或RD162相比,添加比卡鲁胺或OH-氟他胺显著增加了CRPC的生长。VCaP、DuCaP和PC346C CRPC克隆保留了AR反应性表型。在所有LAPC4 CRPC系中,AR的表达及随后的雄激素反应完全丧失。发现EMT和WNT信号标志物在有弹性的PC346C模型以及VCaP、DuCaP和LAPC4的CRPC衍生物中升高。尽管不同模型之间耐药表型多样,但在每个模型内似乎是一致的,与ARTA类型无关。这些数据表明,CRPC状态的进展及其表型可能在癌变早期就已确定。