Bioinformatics Advance Access originally published online on February 12, 2004
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Bioinformatics 20(9) © Oxford University Press 2004; all rights reserved.
Modeling T-cell activation using gene expression profiling and state-space models
1 School of Mathematical Sciences, Claremont Graduate University, 121 E. Tenth St., Claremont, CA 91711, USA, 2 Gatsby Computational Neuroscience Unit, University College London, 17 Queen Square, London, WC1N 3AR, UK, 3 Lorantis Limited, 307 Cambridge Science Park, Cambridge, CB4 OWG, UK, 4 Department of Oncology, University of Bologna, Bellaria Hospital, Bologna, Italy, 5 Keck Graduate Institute of Applied Life Sciences, 535 Watson Drive, Claremont, CA 91171, USA and 6 School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
Received on August 25, 2003; revised on November 20, 2003; accepted on December 18, 2003
Advance Access Publication February 12, 2004
Motivation: We have used state-space models to reverse engineer transcriptional networks from highly replicated gene expression profiling time series data obtained from a well-established model of T-cell activation. State space models are a class of dynamic Bayesian networks that assume that the observed measurements depend on some hidden state variables that evolve according to Markovian dynamics. These hidden variables can capture effects that cannot be measured in a gene expression profiling experiment, e.g. genes that have not been included in the microarray, levels of regulatory proteins, the effects of messenger RNA and protein degradation, etc.
Results: Bootstrap confidence intervals are developed for parameters representing genegene interactions over time. Our models represent the dynamics of T-cell activation and provide a methodology for the development of rational and experimentally testable hypotheses.
Availability: Supplementary data and Matlab computer source code will be made available on the web at the URL given below.
Supplementary information: http://public.kgi.edu/~wild/LDS/index.htm
Contact: david_wild{at}kgi.edu; f.falciani{at}bham.ac.uk
* To whom correspondence should be addressed.
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