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Real-time quantitative PCR analysis of pediatric ependymomas identifies novel candidate genes including TPR at 1q25 and CHIBBY at 22q12-q13
Genes chromosomes & cancer, 2008-11, Vol.47 (11), p.1005-1022
Karakoula, Katherine
Suarez-Merino, Blanca
Ward, Samantha
Phipps, Kim P.
Harkness, William
Hayward, Richard
Thompson, Dominic
Jacques, Thomas S.
Harding, Brian
Beck, John
Thomas, David G. T.
Warr, Tracy J.
2008
Details
Autor(en) / Beteiligte
Karakoula, Katherine
Suarez-Merino, Blanca
Ward, Samantha
Phipps, Kim P.
Harkness, William
Hayward, Richard
Thompson, Dominic
Jacques, Thomas S.
Harding, Brian
Beck, John
Thomas, David G. T.
Warr, Tracy J.
Titel
Real-time quantitative PCR analysis of pediatric ependymomas identifies novel candidate genes including TPR at 1q25 and CHIBBY at 22q12-q13
Ist Teil von
Genes chromosomes & cancer, 2008-11, Vol.47 (11), p.1005-1022
Ort / Verlag
Hoboken: Wiley Subscription Services, Inc., A Wiley Company
Erscheinungsjahr
2008
Link zum Volltext
Quelle
Wiley Blackwell Single Titles
Beschreibungen/Notizen
Loss of chromosome 22 and gain of 1q are the most frequent genomic aberrations in ependymomas, indicating that genes mapping to these regions are critical in their pathogenesis. Using real‐time quantitative PCR, we measured relative copy numbers of 10 genes mapping to 22q12.3‐q13.33 and 10 genes at 1q21‐32 in a series of 47 pediatric intracranial ependymomas. Loss of one or more of the genes on 22 was detected in 81% of cases, with RAC2 and C22ORF2 at 22q12‐q13.1 being deleted most frequently in 38% and 32% of ependymoma samples, respectively. Combined analysis of quantitative‐PCR with methylation‐specific PCR and bisulphite sequencing revealed a high rate (>60% ependymoma) of transcriptional inactivation of C22ORF2, indicating its potential importance in the development of pediatric ependymomas. Increase of relative copy numbers of at least one gene on 1q were detected in 61% of cases, with TPR at 1q25 displaying relative copy number gains in 38% of cases. Patient age was identified as a significant adverse prognostic factor, as a significantly shorter overall survival time (P = 0.0056) was observed in patients <2 years of age compared with patients who were >2 years of age. Loss of RAC2 at 22q13 or amplification of TPR at 1q25 was significantly associated with shorter overall survival in these younger patients (P = 0.0492 and P = < 0.0001, respectively). This study identifies candidate target genes within 1q and 22q that are potentially important in the pathogenesis of intracranial pediatric ependymomas. © 2008 Wiley‐Liss, Inc.
Sprache
Englisch
Identifikatoren
ISSN: 1045-2257
eISSN: 1098-2264
DOI: 10.1002/gcc.20607
Titel-ID: cdi_proquest_miscellaneous_69529055
Format
–
Schlagworte
Adolescent
,
Base Sequence
,
Biomarkers, Tumor - genetics
,
Brain Neoplasms - genetics
,
Carrier Proteins - genetics
,
Child
,
Child, Preschool
,
Chromosomes, Human, Pair 1 - genetics
,
Chromosomes, Human, Pair 22 - genetics
,
DNA, Neoplasm - genetics
,
Ependymoma - genetics
,
Female
,
Gene Dosage
,
Humans
,
In Situ Hybridization, Fluorescence
,
Infant
,
Male
,
Molecular Sequence Data
,
Nuclear Pore Complex Proteins - genetics
,
Nuclear Proteins - genetics
,
Oligonucleotide Array Sequence Analysis
,
Polymerase Chain Reaction - methods
,
Proto-Oncogene Proteins - genetics
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