Increased WSB1 copy number correlates with its over-expression which associates with increased survival in neuroblastoma.
Gain of chromosome 17 is the most prevalent genetic abnormality identified in neuroblastoma (NB) and distal 17q gain has prognostic significance in NB. In this report, we have combined array-based comparative genomic hybridization (A-CGH) and gene expression analysis to investigate gene copy number changes and its impact on the gene expression level as well as their association with prognosis genes located on chromosome 17 in NB tumors. We observed differential gains of chromosome 17 between Stages 4- and 4S tumors. We found that WSB1, mapping to 17q11.1, which was frequently gained in 4S- tumors and not changed in 4- tumors, showed strong correlations between expression level and copy number. Furthermore, the increase of WSB1 gene expression is associated with good outcome in patients with NB of all stages. WSB1 also enhances the prognostic prediction when combined with other current prognostic factors in NB. Our results demonstrate that WSB1 copy number correlates with its expression level and that its high expression associates with good prognosis suggesting a possible role of this gene in the biology of favorable outcome NB. This article contains Supplementary Material available at http://www.interscience.wiley.com/jpages/1045-2257/suppmat.
Chen
Qing-Rong
QR
Oncogenomics Section, Pediatric Oncology Branch, Advanced Technology Center, National Cancer Institute, 8717 Grovemont Circle, Gaithersburg, MD 20877, USA.
Bilke
Sven
S
Wei
Jun S
JS
Greer
Braden T
BT
Steinberg
Seth M
SM
Westermann
Frank
F
Schwab
Manfred
M
Khan
Javed
J
D045744:Cell Line, Tumor; D018628:Gene Dosage; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins; D009363:Neoplasm Proteins / Q000096:biosynthesis* / Q000235:genetics* / Q000502:physiology; D009447:Neuroblastoma / Q000175:diagnosis* / Q000235:genetics* / Q000401:mortality; D011379:Prognosis; D011506:Proteins / Q000235:genetics* / Q000502:physiology
D047908:Intracellular Signaling Peptides and Proteins; D009363:Neoplasm Proteins; D011506:Proteins; C120287:WSB1 protein, human