Gene expression profiling and genetic markers in glioblastoma survival

被引:256
作者
Rich, JN
Hans, C
Jones, B
Iversen, ES
McLendon, RE
Rasheed, BA
Dobra, A
Dressman, HK
Bigner, DD
Nevins, JR
West, M
机构
[1] Duke Univ, Med Ctr, Dept Med, Durham, NC 27710 USA
[2] Duke Univ, Med Ctr, Dept Neurobiol, Durham, NC 27710 USA
[3] Duke Univ, Med Ctr, Dept Pathol, Durham, NC 27710 USA
[4] Duke Univ, Med Ctr, Dept Mol Genet & Microbiol, WM Keck Ctr Neurooncogenom,Inst Stat & Decis Sci, Durham, NC 27710 USA
[5] Duke Univ, Med Ctr, Inst Genome Sci & Policy, Durham, NC 27710 USA
[6] Massey Univ, Inst Informat & Math Sci, Palmerston North, New Zealand
关键词
D O I
10.1158/0008-5472.CAN-04-3936
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Despite the strikingly grave prognosis for older patients with glioblastomas, significant variability in patient outcome is experienced. To explore the potential for developing improved prognostic capabilities based on the elucidation of potential biological relationships, we did analyses of genes commonly mutated, amplified, or deleted in glioblastomas and DNA microarray gene expression data from tumors of glioblastoma patients of age > 50 for whom survival is known. No prognostic significance was associated with genetic changes in epidermal growth factor receptor (amplified in 17 of 41 patients), TP53 (mutated in 11 of 41 patients), p16(INK4A) (deleted in 15 of 33 patients), or phosphatase and tensin homologue (mutated in 15 of 41 patients). Statistical analysis of the gene expression data in connection with survival involved exploration of regression models on small subsets of genes, based on computational search over multiple regression models with cross-validation to assess predictive validity. The analysis generated a set of regression models that, when weighted and combined according to posterior probabilities implied by the statistical analysis, identify patterns in expression of a small subset of genes that are associated with survival and have value in assessing survival risks. The dominant genes across such multiple regression models involve three key genes-SPARC (Osteonectin), Doublecortex, and Semaphorin3B-which play key roles in cellular migration processes. Additional analysis, based on statistical graphical association models constructed using similar computational analysis methods, reveals other genes which support the view that multiple mediators of tumor invasion may be important prognostic factor in glioblastomas in older patients.
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收藏
页码:4051 / 4058
页数:8
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