Conditional Mutations of β-Catenin and APC Reveal Roles for Canonical Wnt Signaling in Lens Differentiation

2009 ◽  
Vol 50 (10) ◽  
pp. 4794 ◽  
Author(s):  
Gemma Martinez ◽  
Mary Wijesinghe ◽  
Kirsty Turner ◽  
Helen E. Abud ◽  
Makoto M. Taketo ◽  
...  
Keyword(s):  
Wnt Signaling ◽  
Canonical Wnt Signaling ◽  
Conditional Mutations ◽  
Canonical Wnt

scholarly journals Notch-Wnt signal crosstalk regulates proliferation and differentiation of osteoprogenitor cells during intramembranous bone healing

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
S. Lee ◽  
L. H. Remark ◽  
A. M. Josephson ◽  
K. Leclerc ◽  
E. Muiños Lopez ◽  
...  
Keyword(s):  
Wnt Signaling ◽  
Notch Signaling ◽  
Bone Regeneration ◽  
Bone Healing ◽  
Canonical Wnt Signaling ◽  
Osteoprogenitor Cells ◽  
Intramembranous Bone ◽  
Proliferation And Differentiation ◽  
Canonical Wnt ◽  
Wnt Signal

AbstractAdult bone regeneration is orchestrated by the precise actions of osteoprogenitor cells (OPCs). However, the mechanisms by which OPC proliferation and differentiation are linked and thereby regulated are yet to be defined. Here, we present evidence that during intramembranous bone formation OPC proliferation is controlled by Notch signaling, while differentiation is initiated by activation of canonical Wnt signaling. The temporospatial separation of Notch and Wnt signal activation during the early stages of bone regeneration suggests crosstalk between the two pathways. In vitro and in vivo manipulation of the two essential pathways demonstrate that Wnt activation leads to initiation of osteogenic differentiation and at the same time inhibits Notch signaling, which results in termination of the proliferative phase. Here, we establish canonical Wnt signaling as a key regulator that facilitates the crosstalk between OPC proliferation and differentiation during intramembranous, primary bone healing.

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