Abstract:
BACKGROUND:In oligodendroglial tumors, allelic losses on chromosome arms 1p and 19q are not only diagnostic molecular markers but also statistically significant predictors of both chemosensitivity and longer recurrence-free survival. In the current study, the authors attempted to analyze 21 patients genetically and clinically, with special emphasis on the correlation between genetic alterations and long-term therapeutic results. METHODS:The authors reviewed the clinical cases of 21 patients who had undergone surgery for oligodendroglial tumors (13 oligodendrogliomas, World Health Organization [WHO] Grade II; 3 anaplastic oligodendrogliomas, WHO Grade III; 3 oligoastrocytomas, WHO Grade II; and 2 anaplastic oligoastrocytomas, WHO Grade III). Genetic testing for 1p deletions was performed using fluorescence in situ hybridization, and testing for 1p, 17p, and 19q deletions was carried out by microsatellite analysis. Survival was analyzed with univariate and multivariate Cox regression models. In addition, a high-resolution deletion map of 1p, which led to the discovery of a new deleted region on 1p, was obtained. RESULTS:Statistical analysis revealed that both loss of 1p and loss of 19q independently and significantly predicted overall survival. A high-resolution deletion map, which displayed unusually narrow deletions, revealed a new region of deletion between D1S513 and D1S458 (1p34.3-36.11). CONCLUSIONS:One of the putative tumor suppressor loci exists more proximally than ever reported. Based on the observation that 1p and 19q deletions predicted survival, the authors suggest further use of diagnostic and prognostic genetic testing in the clinical setting.
journal_name
Cancerjournal_title
Cancerauthors
Hashimoto N,Murakami M,Takahashi Y,Fujimoto M,Inazawa J,Mineura Kdoi
10.1002/cncr.11322subject
Has Abstractpub_date
2003-05-01 00:00:00pages
2254-61issue
9eissn
0008-543Xissn
1097-0142journal_volume
97pub_type
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