在先进的前列腺癌中,pSTAT3表达增加,在安德روج因缺乏治疗开始后
Piotr Bialas1,2, Tamae Kobayashi1, Rebecka Hellsten1
1Department of Translational Medicine, Division of Urological Cancers, Lund University, Malmö, Sweden.
The Prostate
|November 11, 2024
概括
素剥夺疗法 (ADT) 增加了前列腺癌 (PCa) 的酸化信号转换器和转录3 (pSTAT3) 的激活器. 在ADT后的树皮细胞中,高细胞质pSTAT3Ser727预测了生存率差以及对治疗的抗性.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 信号转换器和转录3激活器 (STAT3) 是一种转录因子,涉及致癌,增殖,分化,耐药性和免疫抑制.
- STAT3的激活通过酸化发生在氨酸705 (pSTAT3Tyr705) 或氨酸727 (pSTAT3Ser727).
- 升高的pSTAT3水平与晚期前列腺癌 (PCa) 有关,并与雄激素受体信号交互;其对雄激素剥夺疗法 (ADT) 的反应尚不清楚.
研究的目的:
- 调查雄激素剥夺疗法 (ADT) 对前列腺癌 (PCa) 组织中酸化STAT3 (pSTAT3Tyr705和pSTAT3Ser727) 的表达的影响.
- 为了评估pSTAT3表达作为潜在的生物标志物在接受PCa的ADT患者的瘤结局.
主要方法:
- 从111名患者的前列腺癌组织微阵列分析,在ADT启动之前和之后.
- 针对pSTAT3Tyr705和pSTAT3Ser727进行免疫组织化学染色.
- 使用H分数在恶性上皮质和脑膜区的pSTAT3表达量的量化.
- 单变量和多变量考克斯回归分析以评估生物标志物潜力.
主要成果:
- 在ADT前的样本相比,在ADT后的样本显示了肌体pSTAT3Ser727 (核和细胞质) 的增加.
- 在ADT后,pSTAT3Tyr705表达在 stromal 和恶性上皮细胞区 (除了 stromal 细胞质) 中增加.
- 高细胞质pSTAT3Ser727在流体区的高细胞质pSTAT3Ser727与降低整体存活率,更快地进展到割耐药PCa (CRPC) 和降低无转移存活率 (MFS) 相相关.
- 在ADT后增加的 stromal pSTAT3Ser727预测CRPC发育的时间较短,与pSTAT3Tyr705不同.
- 多变量分析在ADT后的肌瘤和晚期瘤阶段 (pT3/pT4) 确定了高细胞质pSTAT3Ser727作为较差整体存活率和5年MFS的预测因素.
结论:
- 在PCa组织中,ADT显著改变了pSTAT3表达模式,特别是增加了stroma中的pSTAT3.
- 在ADT后与癌症相关的 stromal 细胞中的细胞质pSTAT3Ser727作为总生存和5年无转移生存的独立预后标志物出现.
- 这种标志物可以识别PCa患者,他们患ADT耐药性的风险更高.
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