核焦粘附激酶保护卵巢癌免受顺铂压力的影响

IF 2 Q3 ONCOLOGY
Yichi Zhang, Marjaana Ojalill, Antonia Boyer, Xiao Lei Chen, Elise Tahon, Gaëtan Thivolle Lioux, Marvin Xia, Maryam Abbas, Halime Meryem Soylu, Douglas B Flieder, Denise C Connolly, Alfredo A Molinolo, Michael T McHale, Dwayne G Stupack, David D Schlaepfer
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摘要

肿瘤化疗耐药性频繁出现,限制了高级别浆液性卵巢癌(HGSOC)患者的生存。病灶粘附激酶(FAK)是一种细胞内蛋白酪氨酸激酶,由 PTK2 编码,而 PTK2 基因在 HGSOC 中经常被获得。通常,FAK 在细胞外围发挥作用。不过,FAK 也会进入细胞核调节基因表达。我们发现,在新辅助铂-紫杉醇化疗后存活的 HGSOC 患者肿瘤中,FAK 会发生酪氨酸磷酸化和核定位,体外卵巢肿瘤细胞暴露于亚毒性顺铂后,FAK 会发生核聚集。与野生型FAK重组卵巢肿瘤细胞相比,FAK核定位序列(NLS)突变失活导致肿瘤细胞在体外和体内对顺铂敏感。在FAK NLS-细胞中,顺铂的细胞毒性与细胞外调节激酶(ERK)丝裂原活化蛋白激酶(MAPK)的活化升高有关;当FAK活性或表达缺失时,顺铂刺激的ERK活化也会增强;ERK信号抑制剂可阻止顺铂刺激的细胞死亡。MAPK磷酸酶-1(MKP1)可负性调节ERK信号转导,与FAK-NLS-卵巢肿瘤细胞相比,FAK-WT细胞中顺铂诱导的MKP1水平显著升高。值得注意的是,小分子 MKP1 抑制剂可增强顺铂刺激的 ERK 磷酸化和卵巢肿瘤细胞的死亡。总之,我们的研究结果表明,FAK的表达、活性和核定位在一定程度上通过调节MKP1水平和防止非经典ERK/MAPK活化来限制顺铂的细胞毒性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nuclear Focal Adhesion Kinase Protects against Cisplatin Stress in Ovarian Carcinoma.

Significance: FAK inhibitors are in combinatorial clinical testing with agents that prevent Ras-Raf-MAPK pathway activation in various cancers. This study suggests that nuclear FAK limits ERK/MAPK activation in supporting HGSOC cell survival to cisplatin stress. Overall, it is likely that targets of FAK-mediated survival signaling may be tumor type- and context-dependent.

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