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Issue 12, 2013
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Network-based analysis of omics with multi-objective optimization

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Abstract

Nowadays, computational and statistical methods focusing on integrated analysis of omics data are necessary. A few approaches have been recently described in the literature and a small number of software packages are available. We have developed a new method to generate networks of biological components that incorporate multi-omics information. The novelty of this method relies on using a multi-objective (MO) optimization procedure in order to drive the identification of networks that are enriched according to several statistical estimators. The network-based analysis of omics with MO optimization described in this work can be applied to different types of omics and biological interactions. By using this approach we found protein networks that participate in the establishment of the increased basal differentiation observed in breast tumors of BRCA1-mutation carriers. Additionally, we showed how MO optimization can be used to carry out a network-based comparison among several omic data sets: using transcriptomic data from two types of breast tumors and the corresponding epithelial cells from which tumors were generated, we found a protein network that shows a strong and coherent (the same direction) differential expression when comparing each tumor with its respective epithelial tissue. We have also compared the transcriptional variation detected in three different types of tumors originated in breast, colon and pancreas with the corresponding healthy tissues. Despite the global low correlation observed in the three pairs of tumors, we found more similar networks regulated in the same direction in colon and pancreas tumor cells. In conclusion, we propose the network-based analysis of omics with MO optimization as a valid tool for integrated analysis of omics data.

Graphical abstract: Network-based analysis of omics with multi-objective optimization

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Publication details

The article was received on 02 Aug 2013, accepted on 27 Sep 2013 and first published on 30 Sep 2013


Article type: Method
DOI: 10.1039/C3MB70327D
Mol. BioSyst., 2013,9, 2971-2980

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    Network-based analysis of omics with multi-objective optimization

    E. Mosca and L. Milanesi, Mol. BioSyst., 2013, 9, 2971
    DOI: 10.1039/C3MB70327D

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