Nat commun:在去势难治性前列腺癌中,硫氧还蛋白可以防止雄激素受体诱导的氧化还原损伤

2017-11-06 AlexYang MedSci原创

雄激素阻断(AD)治疗失败常常会导致终极的和难治愈的去势难治性前列腺癌(CRPC)。最近,有研究人员展示了氧化还原保护性蛋白-硫氧还蛋白-1(TRX1)随着前列腺癌的恶化以及在雄激素阻断的CRPC细胞中增加,这个现象表明了CRPC对TRX1具有增强的依赖性。研究人员发现,TRX1抑制作用可通过shRNA或者PX-12(在前列腺癌中未测试)来妨碍CRPC细胞的生长,并且比它们相对应的雄激素依赖的物质

雄激素阻断(AD)治疗失败常常会导致终极的和难治愈的去势难治性前列腺癌(CRPC)。最近,有研究人员展示了氧化还原保护性蛋白-硫氧还蛋白-1(TRX1)随着前列腺癌的恶化以及在雄激素阻断的CRPC细胞中增加,这个现象表明了CRPC对TRX1具有增强的依赖性。

研究人员发现,TRX1抑制作用可通过shRNA或者PX-12(在前列腺癌中未测试)来妨碍CRPC细胞的生长,并且比它们相对应的雄激素依赖的物质妨碍程度更大。TRX1抑制剂可以提高活性氧水平和p53水平,并且可以促进雄激素阻断CRPC细胞的死亡。令人意外的是,TRX1抑制剂在AD情况下同样提高了雄激素受体(AR)的水平,并且AR的消耗缓和了TRX1抑制剂调节的ROS的产生和细胞死亡,表明了AD抵抗性AR在CRPC中的表达诱导了氧化还原的损伤。另外,体内TRX1抑制剂通过shRNA或者PX-12逆转了CRPC细胞的去势难治性表型,并且在全身AD情况下显著的抑制了肿瘤的生长。因此,TRX1是一个可以操作的CRPC治疗靶标,具体是通过它对AR诱导氧化还原胁迫所起的保护性作用。

原始出处:

Govindi J. Samaranayake, Clara I. Troccoli, Mai Huynh et al. Thioredoxin-1 protects against androgen receptor-induced redox vulnerability in castration-resistant prostate cancer. Nat commun. 31 Oct 2017.

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    2018-05-04 liuli5079
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    2018-05-08 一叶知秋
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    2017-11-08 freve
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    2017-11-06 有备才能无患

    Natcommun:在去势难治性前列腺癌中.硫氧还蛋白可以防止雄激素受体诱导的氧化还原损伤

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Sci Rep:恶性前列腺癌中,SFRP4基因表达增加

为了改善危险分层和治疗选择,惰性前列腺癌和恶性前列腺癌之间的分子差异更多的了解是需要的。分泌性卷曲相关蛋白4(SFRP4)是癌症相关的Wnt信号通路的调控子,并且之前有报道它可作为前列腺癌恶化的一个潜在的标记。最近,有研究人员调查和确定了在9个独立群体中,SFRP4基因表达与恶化之间的关系(n=2157)。研究人员通过对所有群体的差异表达和组合元分析,检测到了SFRP4在癌症中要比正常样本中表达量

Onco Targets Ther:LOC440040或是前列腺癌新的预后标志物及治疗靶点

长链非编码RNAs(lncRNAs)在前列腺癌(PCa)的发生和发展中起作用。本研究旨在通过高通量测序技术确定差异表达的lncRNA,并探讨其与PCa的表达/生物学功能及临床表现之间的相关性。通过微阵列筛选和生物分析鉴定候选的lncRNAs。通过逆转录聚合酶链式反应确定lncRNA LOC440040在PCa组织和细胞系中的表达。采用配对t检验或卡方检验分析LOC440040水平与临床病理特征的关

Sci Rep:恩杂鲁胺可以抑制睾丸素诱导的人类前列腺癌异种种植体的生长

斑马鱼已经成为一种非常流行的人类肿瘤异种种植模型,尤其是对包括前列腺癌(PCa)在内的实体瘤。到目前为止,在斑马鱼中睾丸素存在情况下的异种种植体研究还没有进行过,甚至在雄激素依赖的细胞模型中,如LNCaP细胞系中,也没有进行过类似的研究。最近,有研究人员为了探究PCa在人类激素环境中发展的建模,他们研究并确定了外源睾丸素对LNCaP生长的影响,或者在斑马鱼胚胎中雄激素依赖的C4-2细胞异种种植情况

Oncogene:雄激素受体调控的脂质合成再激活可促使去势难治性前列腺癌的恶化

雄激素受体(AR)是一种转录激活因子,并且在前列腺癌细胞中可以刺激基因的表达来满足各种细胞功能的需求,包括了代谢和增殖过程。AR信号通路同样对激素依赖的前列腺癌(PCa)的发展是必需的,并且它的活性可以由雄激素阻断疗法(ADTs)来封闭。尽管PCa病人在治疗刚开始对ADTs具有很好的治疗反应,但是癌症不可避免地复发并且恶化到致死性去势难治性前列腺癌(CRPC)。虽然雄激素水平被抑制,AR在CRPC