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Array‐comparative genomic hybridization of central chondrosarcoma
Author(s) -
Rozeman Leida B.,
Szuhai Karoly,
Schrage Yvonne M.,
Rosenberg Carla,
Tanke Hans J.,
Taminiau Antonie H. M.,
CletonJansen Anne Marie,
Bovée Judith V. M. G.,
Hogendoorn Pancras C. W.
Publication year - 2006
Publication title -
cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.052
H-Index - 304
eISSN - 1097-0142
pISSN - 0008-543X
DOI - 10.1002/cncr.22001
Subject(s) - comparative genomic hybridization , chromosome , biology , cancer research , genetics , gene , chondrosarcoma , gene duplication , tumor progression , medicine , pathology
BACKGROUND. Enchondromas are benign lesions that can occur as solitary tumors or multiple tumors (Ollier disease) and may be precursors of central chondrosarcomas. Recurrent chondrosarcomas can be of a higher grade compared with primary tumors, suggesting possible progression. METHODS. Genome‐wide array‐comparative genomic hybridization (CGH) was used to investigate copy number changes in enchondromas and central chondrosarcomas to elucidate both primary genetic events and the events related to tumor progression. Analyses of variance, Student t tests, and hierarchical clustering were used for the current analyses. Array‐CGH data were compared with complementary DNA (cDNA) and quantitative reverse‐transcriptase polymerase chain reaction expression array data. RESULTS. Genomic imbalances were rare in enchondromas and in grade I chondrosarcomas, whereas they were frequent in high‐grade tumors. No genomic imbalances that were specific for Ollier disease were found. The authors identified 22 chromosome regions that were imbalanced in ≥25% of tumors, and 3 of those regions were located on chromosome 12 (12p13, 12p11.21‐p11.23, and 12q13, containing among others the PTPRF‐interacting protein‐binding protein 1 ( PPFIBP1 ) gene. Loss of chromosome 6 and gain of 12q12 were associated with higher grade. Comparison of array‐CGH with cDNA expression showed correlations for the ribosomal protein S6 ( RPS6 ) and cyclin‐dependent kinase 4 ( CDK4 ) genes. CONCLUSIONS. In the current study the authors identified genomic regions and new candidate genes ( RPS6 , CDK4 , and PPFIBP1 ) that were associated with tumor progression and prognosis in patients with high‐grade chondrosarcomas. Cancer 2006. © 2006 American Cancer Society.