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Evolving sensitivity balances Boolean networks

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Luo, Jamie X. and Turner, Matthew S. (2012) Evolving sensitivity balances Boolean networks. PLoS ONE, Vol.7 (No.5). e36010. doi:10.1371/journal.pone.0036010

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Official URL: http://dx.doi.org/10.1371/journal.pone.0036010

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Abstract

We investigate the sensitivity of Boolean Networks (BNs) to mutations. We are interested in Boolean Networks as a model of Gene Regulatory Networks (GRNs). We adopt Ribeiro and Kauffman’s Ergodic Set and use it to study the long term dynamics of a BN. We define the sensitivity of a BN to be the mean change in its Ergodic Set structure under all possible loss of interaction mutations. Insilico experiments were used to selectively evolve BNs for sensitivity to losing interactions. We find that maximum sensitivity was often achievable and resulted in the BNs becoming topologically balanced, i.e. they evolve towards network structures in which they have a similar number of inhibitory and excitatory interactions. In terms of the dynamics, the dominant sensitivity strategy that evolved was to build BNs with Ergodic Sets dominated by a single long limit cycle which is easily destabilised by mutations. We discuss the relevance of our findings in the context of Stem Cell Differentiation and propose a relationship between pluripotent stem cells and our evolved sensitive networks.

Item Type: Journal Article
Subjects: Q Science > QA Mathematics
Divisions: Faculty of Science > Centre for Complexity Science
Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Algebra, Boolean, System analysis, Genetic regulation -- Mathematical models
Journal or Publication Title: PLoS ONE
Publisher: PLOS
ISSN: 1932-6203
Official Date: 7 May 2012
Dates:
DateEvent
7 May 2012Published
Volume: Vol.7
Number: No.5
Page Range: e36010
DOI: 10.1371/journal.pone.0036010
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
Funder: Engineering and Physical Sciences Research Council (EPSRC)
Grant number: EP/E501311/1 (EPSRC), EP/I005439/1 (EPSRC)

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