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Amplicons on chromosome 12q13‐21 in glioblastoma recurrences
Author(s) -
Fischer Ulrike,
Leidinger Petra,
Keller Andreas,
Folarin Amos,
Ketter Ralf,
Graf Norbert,
Lenhof HansPeter,
Meese Eckart
Publication year - 2010
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/ijc.24971
Subject(s) - amplicon , glioblastoma , biology , gene duplication , chromosome , gene , cancer research , genetics , polymerase chain reaction
There is limited knowledge on the in vivo behavior of amplified regions in human tumors. First evidence indicates that amplicon structures are largely maintained in recurrent tumors. Here, we investigated the fate of amplified regions in several independent cases of recurrent glioblastoma and the possible association of 12q13–21 amplifications and survival. We analyzed 12q13–21 amplicon numbers and sizes in glioblastoma and their recurrences by array‐CGH. The majority of the 12q13–21 amplicons found in the original tumor are lost in the subsequent recurrence. Likewise, the majority of the amplicons found in the first recurrence are lost in the second recurrence. The remaining amplicons of recurrences often expanded or were maintained in size. Because of re‐emergences and de novo appearances of amplicons, however, the overall number of amplicons did not decrease in the recurrences. Understanding genetic changes including gene amplifications in the development of tumor recurrences will contribute to rational therapeutic strategies for an improved patient survival. We recognized a significant longer survival time in glioblastoma patients that lack amplifications of either CDK4 , CYP27B1 , XRCC6BP1 ( KUB3 ), or MDM2 .