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Neuroblastoma tumors with favorable and unfavorable outcomes: Significant differences in mRNA expression of genes mapped at 1p36.2.

Journal article
Authors Susanne Fransson
Tommy Martinsson
Katarina Ejeskär
Published in Genes, chromosomes & cancer
Volume 46
Issue 1
Pages 45-52
ISSN 1045-2257
Publication year 2007
Published at Institute of Biomedicine, Department of Medical and Clinical Genetics
Pages 45-52
Language en
Links dx.doi.org/10.1002/gcc.20387
Keywords Chromosome Deletion, Chromosome Mapping, Chromosomes, Human, Pair 1, Gene Expression Profiling, Gene Expression Regulation, Neoplastic, Genes, Tumor Suppressor, Humans, Neuroblastoma, diagnosis, genetics, RNA, Messenger, metabolism
Subject categories Medical and Health Sciences

Abstract

The distal part of 1p is frequently deleted in aggressive neuroblastoma, and the region is believed to harbor one or more tumor suppressor genes relevant to tumor development. To analyze differences among neuroblastoma tumors, an expression profile was established for the genes mapped within a previously described shortest region of overlap of deletions at 1p36.2. The gene expression levels were quantified by TaqMan real-time (RT)-PCR for 30 transcripts using 55 primary neuroblastoma tumors. Here we report on a significant decrease in gene expression of the genes RERE, PIK3CD, LZIC, PGD, and PEX14 and an increase of SLC2A5 when comparing tumors of favorable biology to Stage 4 neuroblastomas. When comparing 1p-deleted tumors of all stages to tumors with an intact 1p, a significant difference at gene-by-gene level in TNFRSF9, RERE, PIK3CD, CLSTN1, CTNNBIP1, and CASZ1 was detected. A complete loss of expression could not be seen for any single gene analyzed. Several of the genes with diminished expression in unfavorable or 1p-deleted tumors have functions that could contribute to tumor development. It is also possible that a combination of lowly expressed genes at 1p, rather than one single classical tumor suppressor gene, causes the unfavorable outcome associated with 1p-deletion in neuroblastoma.

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