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Updated: Jul 17, 2026
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Spatial and Temporal Analysis of Active ERK in the C. elegans Germline
Published on: November 29, 2016
A hidden oncogenic positive feedback loop caused by crosstalk between Wnt and ERK pathways
Oncogene
|January 24, 2007
Summary
A newly discovered positive feedback loop in Wnt/ERK pathway crosstalk can lead to cancer. Mutations in signaling proteins can cause sustained pathway activation, driving carcinogenesis even without external signals.
Area of Science:
- Molecular Biology
- Cancer Research
- Systems Biology
Background:
- Wnt and extracellular signal-regulated kinase (ERK) pathways are implicated in cancer pathogenesis.
- Recent findings suggest crosstalk exists between Wnt and ERK pathways.
Purpose of the Study:
- To investigate the crosstalk between Wnt and ERK pathways.
- To identify and model a potential positive feedback loop within this crosstalk.
- To explore the role of this feedback loop in cancer development.
Main Methods:
- Integrated experimental reports with established mathematical models of Wnt and ERK pathways.
- Developed a computational model to represent the Wnt/ERK pathway crosstalk.
- Performed experimental validation of model predictions.
Main Results:
- A positive feedback loop was identified within the Wnt/ERK pathway crosstalk.
- This feedback loop can induce bistability in both Wnt and ERK signaling.
- Mutations, such as increased beta-catenin or reduced MAP kinase phosphatase activity, can lead to irreversible pathway activation.
- Sustained Wnt and ERK pathway activity can occur independently of external signals.
Conclusions:
- The identified positive feedback loop in Wnt/ERK crosstalk is a key mechanism in carcinogenesis.
- Mutational alterations in individual proteins can have widespread effects on cellular signaling.
- Pathway crosstalk provides a mechanism for mutations to impact system-level functions, contributing to cancer progression.
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