Learning robust cell signalling models from high throughput proteomic data. (12th June 2009)

• Record Type: Journal Article
• Authors: Koch, Mitchell; Broom, Bradley M.; Subramanian, Devika
• Is Part Of: International journal of bioinformatics research and applications. Volume 5:Number 3(2009)
• Page Start: 241
• Page End: 253
• Publication Date: 2009-06-12
• Subjects: systems biology -- Bayesian networks -- T-cell signalling -- crosstalk -- flow cytometry -- bioinformatics -- cell signalling models -- proteomic data; Bioinformatics -- Periodicals; 570.285
• Languages: English
• ISSNs: 1744-5485

Abstract

We propose a framework for learning robust Bayesian network models of cell signalling from high-throughput proteomic data. We show that model averaging using Bayesian bootstrap resampling generates more robust structures than procedures that learn structures using all of the data. We also develop an algorithm for ranking the importance of network features using bootstrap resample data. We apply our algorithms to derive the T-cell signalling network from the flow cytometry data of Sachs et al. (2005). Our learning algorithm has identified, with high confidence, several new crosstalk mechanisms in the T-cell signalling network. Many of them have already been confirmed experimentally in the recent literature and six new crosstalk mechanisms await experimental validation.