A p53 drug response signature identifies prognostic genes in high-risk neuroblastoma.

A p53 drug response signature identifies prognostic genes in high-risk neuroblastoma.
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DOI:
10.1371/journal.pone.0079843
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Shohet JM
Shohet JM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Barbieri E;De Preter K;Capasso M;Johansson P;Man TK;Chen Z;Stowers P;Tonini GP;Speleman F;Shohet JM

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Chemotherapy induces apoptosis and tumor regression primarily through activation of p53-mediated transcription. Neuroblastoma is a p53 wild type malignancy at diagnosis and repression of p53 signaling plays an important role in its pathogenesis. Recently developed small molecule inhibitors of the MDM2-p53 interaction are able to overcome this repression and potently activate p53 dependent apoptosis in malignancies with intact p53 downstream signaling. We used the small molecule MDM2 inhibitor, Nutlin-3a, to determine the p53 drug response signature in neuroblastoma cells. In addition to p53 mediated apoptotic signatures, GSEA and pathway analysis identified a set of p53-repressed genes that were reciprocally over-expressed in neuroblastoma patients with the worst overall outcome in multiple clinical cohorts. Multifactorial regression analysis identified a subset of four genes (CHAF1A, RRM2, MCM3, and MCM6) whose expression together strongly predicted overall and event-free survival (p<0.0001). The expression of these four genes was then validated by quantitative PCR in a large independent clinical cohort. Our findings further support the concept that oncogene-driven transcriptional networks opposing p53 activation are essential for the aggressive behavior and poor response to therapy of high-risk neuroblastoma.
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