Axin PPI Networks: New Interacting Proteins and New Targets?
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Updated: Mar 12, 2026

Genome-wide Protein-protein Interaction Screening by Protein-fragment Complementation Assay PCA in Living Cells
Published on: March 3, 2015
Xiaomin Song, Wenwen Cai, Lin Li1
1Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Yue yang Road #320, Shanghai 200031, China. lli@sibs.ac.cn.
Abstract:
The scaffold protein Axin plays important roles in multiple signaling pathways through mediating the formation of different signaling complexes. Axin is best known for its role as a negative regulator in Wnt/β-catenin pathway. Aberrant activation of the key components in Wnt/β-catenin pathway including Axin has been linked to a variety of human cancers. Drugs developed for this pathway are far from satisfying largely due to the limited targets especially enzymesin this pathway. Almost all Axinsignal pathways depend on a number of protein-protein interactions (PPIs) for transmitting information, making PPIs attractive targets and probably a future direction for drug discovery. Axin interacts with a plethora of proteins, positively or negatively regulating several signaling pathways that are closely involved in the pathogenesis of human disease. Studies in recent years indicated Axin as a promising target for treating Wnt-driven diseases. With the identification of more interacting partners for Axin and increased understanding about the roles of these Axin-mediated PPIs in human disease, new targets may surface from the Axin PPI networks, which may lead to the generation of new drugs and treatmentstrategies. In this review, we outline the Axin PPI networks in several pathways especially in Wnt signaling and discuss how those Axin-interacting proteins affect the respective signaling pathways through an interaction with Axin.
Insights
Axin scaffold protein interactions are crucial in Wnt signaling and human diseases. Targeting these protein-protein interactions (PPIs) offers promising new therapeutic strategies for cancer and other Wnt-driven conditions.
Area of Science:
- Molecular Biology
- Cell Signaling
- Oncology
Background:
- Axin is a scaffold protein regulating multiple signaling pathways, notably as a negative regulator of the Wnt/β-catenin pathway.
- Dysregulation of Axin and the Wnt/β-catenin pathway is implicated in various human cancers.
- Current therapeutic targets in this pathway are limited, particularly enzymes, highlighting a need for novel strategies.
Purpose of the Study:
- To review the Axin protein-protein interaction (PPI) networks across different signaling pathways, with a focus on Wnt signaling.
- To discuss the role of Axin-interacting proteins in modulating signaling pathways relevant to human diseases.
- To explore Axin PPI networks as a source for novel drug targets and therapeutic strategies.
Main Methods:
- Literature review of studies identifying Axin interacting partners.
- Analysis of the functional roles of Axin-mediated protein-protein interactions (PPIs).
- Examination of Axin's involvement in Wnt signaling and other disease-relevant pathways.
Main Results:
- Axin mediates numerous protein-protein interactions (PPIs) that are central to signal transduction.
- These Axin-mediated PPIs play critical roles in regulating pathways involved in human disease pathogenesis.
- Axin itself is a promising target for Wnt-driven diseases, with its PPI network offering further avenues.
Conclusions:
- Axin's extensive PPI network is fundamental to its function in various signaling pathways, especially Wnt signaling.
- Understanding these Axin-mediated PPIs is key to uncovering new therapeutic targets for Wnt-driven diseases.
- Targeting Axin-associated PPIs represents a promising future direction for drug discovery and treatment strategies.
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