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Protein network construction using reverse phase protein array data
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DOI：10.1016/j.ymeth.2017.06.017.png)
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Abstract
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In this paper, we introduce a novel computational method for constructing protein networks based on reverse phase protein array (RPPA) data to identify complex patterns in protein signaling. The method is applied to phosphoproteomic profiles of basal expression and activation/phosphorylation of 76 key signaling proteins in three breast cancer cell lines (MCF7, LCC1, and LCC9). Temporal RPPA data are acquired at 48 h, 96 h, and 144 h after knocking down four genes in separate experiments. These genes are selected from a previous study as important determinants for breast cancer survival. Interaction networks are constructed by analyzing the expression levels of protein pairs using a multivariate analysis of variance model. A new scoring criterion is introduced to determine relevant protein pairs. Through a network topology based analysis, we search for wiring patterns to identify key proteins that are associated with significant changes in expression levels across various experimental conditions. (C) 2017 Elsevier Inc. All rights reserved.
Keywords:
RPPA
MANOVA
Network construction
Topology analysis
Breast cancer
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