Prognostic impact of MYCN, DDX1, TrkA, and TrkC gene transcripts expression in neuroblastoma.

Abstract:

BACKGROUND:The aims of this study were to define the mRNA expression profiles of MYCN, DDX1, TrkA, and TrkC in biopsy tumor samples from 64 Brazilian patients with neuroblastomas of different risk stages and to correlate altered expression with prognostic values. PROCEDURE:Patients were retrospectively classified into low- (n = 11), intermediate- (n = 18), and high-risk (n = 35) groups using standard criteria. The mRNA levels of the above genes were measured by quantitative real-time polymerase chain reaction. Univariate analyses were performed and survival curves were plotted by the Kaplan-Meier method. RESULTS:Of the 64 patients, 53% were female and 62.5% were older than 18 months. The 5-year overall survival (OS) for the entire cohort was 40.3%, with inferior median OS in patients identified in the intermediate- and high-risk groups. A significant difference in OS with respect to TrkA mRNA expression was found for the high-risk group vs. either the low- or intermediate-risk groups (P < 0.01, log rank test). Within the intermediate-risk group, neuroblastoma patients with positive TrkA mRNA expression had better clinical outcomes than patients with no TrkA transcript expression (P = 0.004). Another difference in OS was only found between the intermediate- and high-risk groups (P < 0.027, log rank test). No significant correlation of mRNA expression and survival outcome could be detected for the MYCN, DDX1. CONCLUSIONS:Positive expression of TrkA mRNA may be a clinically useful addition to the current risk classification system, allowing the identification of NB tumors with favorable prognosis.

journal_name

Pediatr Blood Cancer

journal_title

Pediatric blood & cancer

authors

de Souza DR,Sanabani SS,de Souza AC,Filho Odone V,Epelman S,Bendit I

doi

10.1002/pbc.22823

subject

Has Abstract

pub_date

2011-05-01 00:00:00

pages

749-56

issue

5

eissn

1545-5009

issn

1545-5017

journal_volume

56

pub_type

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