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Modeling Paracrine Noncanonical Wnt Signaling In Vitro
Published on: December 10, 2021
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Extracellular WNTs: Trafficking, Exosomes, and Ligand-Receptor Interaction
1Developmental Biochemistry, University Medical Center Goettingen, Goettingen, Germany. julia.gross@health-and-medical-university.de.
Handbook of Experimental Pharmacology
|September 10, 2021
Summary
WNT proteins are secreted via extracellular vesicles (EVs), challenging the view of EVs as mere cellular waste. This review explores WNT secretion on EVs and proposes a unifying model for their function in tissue organization.
Area of Science:
- Cell Biology
- Developmental Biology
- Molecular Biology
Background:
- WNT signaling is crucial for tissue organization during development.
- Recent research investigates the mechanisms of WNT protein secretion.
- WNT proteins are released into the extracellular space via specialized pathways.
Purpose of the Study:
- To review the role of extracellular vesicles (EVs), including exosomes, in WNT protein secretion.
- To address the ongoing debate regarding the in vivo relevance and function of EVs in WNT signaling.
- To propose a unifying model for WNT secretion on EVs to reconcile conflicting observations.
Main Methods:
- Literature review of WNT secretion mechanisms.
- Analysis of findings on WNT proteins associated with EVs.
- Discussion of functional implications and current controversies in the field.
Main Results:
- WNT proteins have been identified on extracellular vesicles (EVs).
- EVs represent a potential mechanism for WNT protein delivery.
- There is ongoing debate about the in vivo significance of EV-mediated WNT secretion.
Conclusions:
- EVs may play a significant role in WNT signaling and tissue organization.
- Further research is needed to fully understand the function of WNTs on EVs in vivo.
- A unifying model can help resolve discrepancies in WNT secretion research.
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