High RBM3 expression is associated with an improved survival and oxaliplatin response in patients with metastatic colorectal cancer.

Siesing C, Sorbye H, Dragomir A, Pfeiffer P, Qvortrup C, Pontén F, Jirström K, Glimelius B, Eberhard J

PLoS ONE 12 (8) e0182512 [2017-08-11; online 2017-08-11]

High expression of the RNA-binding motif protein 3 (RBM3) has been shown to correlate, with prolonged survival in several malignant diseases and with the benefit of platinum-based chemotherapy in ovarian cancer. The aim of this study was to evaluate RBM3 in metastatic colorectal cancer (mCRC) as a prognostic factor for overall survival and in relation to benefit of first-line chemotherapy. Immunohistochemical staining was conducted and evaluated in tumours from 455 mCRC patients. Kaplan-Meier analysis and Cox regression proportional hazards models were used to access the impact of RBM3 expression on overall survival (OS) and progression-free survival (PFS). High RBM3 expression, both nuclear and cytoplasmic, was an independent prognostic factor for prolonged OS (hazard ratio [HR] 0.67, 95% confidence interval [CI] 0.50-0.90 and HR 0.66, 95% CI 0.48-0.91, respectively). PFS was significantly longer in patients with high RBM3 expression who had received first-line oxaliplatin based treatment, compared to those who had received irinotecan based treatment, both regarding nuclear and cytoplasmic expression (p-value 0.020 and 0.022 respectively). High RBM3 expression is an independent predictor of prolonged survival in mCRC patients, in particular in patients treated with first-line oxaliplatin based chemotherapy.

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PubMed 28800641

DOI 10.1371/journal.pone.0182512

Crossref 10.1371/journal.pone.0182512

PONE-D-17-04916

pmc PMC5553773