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A predictive analysis of the SP120 and 10D7G2 antibodies for human equilibrative nucleoside transporter 1 (hENT1) in pancreatic ductal adenocarcinoma treated with adjuvant gemcitabine. | LitMetric

AI Article Synopsis

Article Abstract

Expression of human equilibrative nucleoside transporter 1 (hENT1) in pancreatic ductal adenocarcinoma (PDAC) has been postulated to be a marker of sensitivity to gemcitabine. However, heterogeneity in the studies attempting to quantify hENT1 expression in patients with PDAC treated with gemcitabine has yielded inconclusive results that impede the adoption of hENT1 expression as a predictive biomarker. Tissue microarrays consisting of PDAC specimens from 227 patients acquired between 1987 and 2013 annotated with treatment and outcome information were subjected to staining with two antibodies for hENT1 (10D7G2 and SP120) on a single automated platform and scored by two independent pathologists blinded to treatment and outcome. The resultant scores were subjected to individual predictive disease-specific survival analysis and to unsupervised hierarchical clustering to generate a multi-marker classification. Tumour cell staining prevalence using either SP120 or 10D7G2 was predictive of gemcitabine sensitivity ( = 0.02;  = 0.01). When combined, three groups emerged, classified as SP120_10D7G2, SP120_10D7G2, and SP120_10D7G2, in which adjuvant gemcitabine conferred median survival differences of 0.2, 0.8, and 1.5 ( = 0.76,  = 0.06,  = 0.01) years, respectively. These results were largely replicated in multivariable analysis with the value for the SP120_10D7G2 cluster achieving statistical significance ( = 0.03). These data suggest that either antibody for hENT1 can be used to predict gemcitabine sensitivity in resected PDAC. However, using both antibodies adds valuable information that enables the stratification of patients who can expect to have a good, intermediate, and poor response to adjuvant gemcitabine.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5527321PMC
http://dx.doi.org/10.1002/cjp2.75DOI Listing

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