Comput. Biol. Med. - Learning the local Bayesian network structure around the ZNF217 oncogene in breast tumours.

Tópicos

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Resumo

In this study, we discuss and apply a novel and efficient algorithm for learning a local Bayesian network model in the vicinity of the ZNF217 oncogene from breast cancer microarray data without having to decide in advance which genes have to be included in the learning process. ZNF217 is a candidate oncogene located at 20q13, a chromosomal region frequently amplified in breast and ovarian cancer, and correlated with shorter patient survival in these cancers. To properly address the difficulties in managing complex gene interactions given our limited sample, statistical significance of edge strengths was evaluated using bootstrapping and the less reliable edges were pruned to increase the network robustness. We found that 13 out of the 35 genes associated with deregulated ZNF217 expression in breast tumours have been previously associated with survival and/or prognosis in cancers. Identifying genes involved in lipid metabolism opens new fields of investigation to decipher the molecular mechanisms driven by the ZNF217 oncogene. Moreover, nine of the 13 genes have already been identified as putative ZNF217 targets by independent biological studies. We therefore suggest that the algorithms for inferring local BNs are valuable data mining tools for unraveling complex mechanisms of biological pathways from expression data. The source code is available at http://www710.univ-lyon1.fr/~aaussem/Software.html.

Resumo Limpo

studi discuss appli novel effici algorithm learn local bayesian network model vicin znf oncogen breast cancer microarray data without decid advanc gene includ learn process znf candid oncogen locat q chromosom region frequent amplifi breast ovarian cancer correl shorter patient surviv cancer proper address difficulti manag complex gene interact given limit sampl statist signific edg strength evalu use bootstrap less reliabl edg prune increas network robust found gene associ deregul znf express breast tumour previous associ surviv andor prognosi cancer identifi gene involv lipid metabol open new field investig deciph molecular mechan driven znf oncogen moreov nine gene alreadi identifi putat znf target independ biolog studi therefor suggest algorithm infer local bns valuabl data mine tool unravel complex mechan biolog pathway express data sourc code avail httpwwwunivlyonfraaussemsoftwarehtml

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