Kformula

A description of a detailed ordinary differential equation (ODE) model of Wnt/β-catenin signalling


It is a link to a supplementary information from a publication: Benary, U., Kofahl, B., Hecht, A. and Wolf, J. (2015), Mathematical modelling suggests a differential impact of β-transducin repeat-containing protein paralogues on Wnt/β-catenin signalling dynamics. FEBS Journal, 282: 1080–1096. doi: 10.1111/febs.13204

http://onlinelibrary.wiley.com/doi/10.1111/febs.13204/suppinfo

The Wnt/β-catenin signalling pathway is involved in the regulation of a multitude of cellular processes by controlling the concentration of the transcriptional regulator β-catenin. Proteasomal degradation of β-catenin is mediated by the two β-transducin repeat-containing protein (β-TrCP) paralogues HOS and FWD1, which are functionally interchangeable and thereby considered to function redundantly in the pathway. HOS and FWD1 are both regulated by Wnt/β-catenin signalling, albeit in opposite directions, thus establishing interlocked negative and positive feedback loops. The functional relevance of the opposite regulation of HOS and FWD1 by Wnt/β-catenin signalling in conjunction with their redundant activities in proteasomal degradation of β-catenin is an unresolved issue. Using a detailed ordinary differential equation (ODE) model, we investigated the specific influence of each individual feedback mechanism and their combination on Wnt/β-catenin signal transduction under wild type and cancerous conditions. We found that under wild type conditions the signalling dynamics are predominantly affected by the HOS feedback due to a higher concentration of HOS than FWD1. Transcriptional up-regulation of FWD1 by other signalling pathways reduced the impact of the HOS feedback. The opposite regulation of HOS and FWD1 expression by Wnt/β-catenin signalling allows employing the FWD1 feedback as a compensation mechanism against aberrant pathway activation due to reduced HOS concentration. In contrast, the FWD1 feedback provides no protection against aberrant activation in APC mutant cancer cells.

1 item is associated with this Model: view in large icon

Filename Format Size Action
http://dx.doi.org/10.1111 Website Link

Organism: Not specified

Model type: Ordinary differential equations (ODE)

Model format: PDF (Model description)

Execution or visualisation environment: Not specified

Model image: No image specified

help Contributors

[Andreas Hecht]

help Attributions

None

help Scales


Views: 750
  • Created: 15th Jun 2015 at 13:22
  • Last updated: 15th Jun 2015 at 14:19
  • Last used: 16th Oct 2017 at 02:20

Related items

Ajax-loader-large

Log in / Register

Need an account?
Sign up

Forgotten password?

Front Page

Virtual Liver Network

(v.0.22.0)

Related Projects and friends


Imprint Taverna workflow workbench myExperiment JWS Online ISATAB myGrid Sabio-RK BioPortal Semantic SBML

Powered by:

Ror-logo-32

Icons:
Silk icons 1.3
Crystal Clear icons