Pharmacological inhibition of Rho-kinase (ROCK) signaling enhances cisplatin resistance in neuroblastoma cells.

Pharmacological inhibition of Rho-kinase (ROCK) signaling enhances cisplatin resistance in neuroblastoma cells.
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DOI:
10.3892/ijo_00000781
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发表时间:
2010-11
影响因子:
5.2
通讯作者:
Bryan BA
Bryan BA
中科院分区:
医学2区
文献类型:
--
作者:
Street CA;Routhier AA;Spencer C;Perkins AL;Masterjohn K;Hackathorn A;Montalvo J;Dennstedt EA;Bryan BA

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RhoA/Rho激酶(ROCK)信号通路在细胞存活中的作用仍然是一个非常有争议的问题,其激活在许多细胞类型中是促凋亡的,而在其他细胞类型中是抗凋亡的。为了测试ROCK抑制是否有助于化疗后的肿瘤细胞存活或死亡,我们用药理学ROCK抑制剂(Y27632)或假手术处理顺铂损伤的神经母细胞瘤细胞,并监测细胞存活、化学抗性表型的积累和体内肿瘤形成。此外,我们检测了ROCK抑制是否改变了已知与顺铂耐药有关的基因的表达。我们的研究表明,ROCK抑制导致细胞存活率增加,获得性化疗耐药性,并增强顺铂细胞毒性后的肿瘤存活率,部分原因是顺铂耐药基因的表达改变。这些发现表明,ROCK抑制与顺铂化疗联合可能导致神经母细胞瘤的肿瘤耐药性增强。
The role of the RhoA/Rho kinase (ROCK) signaling pathway in cell survival remains a very controversial issue, with its activation being pro-apoptotic in many cell types and anti-apoptotic in others. To test if ROCK inhibition contributes to tumor cell survival or death following chemotherapy, we treated cisplatin damaged neuroblastoma cells with a pharmacological ROCK inhibitor (Y27632) or sham, and monitored cell survival, accumulation of a chemoresistant phenotype, and in vivo tumor formation. Additionally, we assayed if ROCK inhibition altered the expression of genes known to be involved in cisplatin resistance. Our studies indicate that ROCK inhibition results in increased cell survival, acquired chemoresistance, and enhanced tumor survival following cisplatin cytotoxicity, due in part to altered expression of cisplatin resistance genes. These findings suggest that ROCK inhibition in combination with cisplatin chemotherapy may lead to enhanced tumor chemoresistance in neuroblastoma.
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