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Studying Wnt Signaling During Patterning of Conducting Airways
Published on: October 16, 2016
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Usp16 modulates Wnt signaling in primary tissues through Cdkn2a regulation
Maddalena Adorno1, Benedetta Nicolis di Robilant1, Shaheen Shabbir Sikandar1
1Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California, 94305, USA.
Scientific Reports
|December 4, 2018
Summary
Usp16, a regulator of stem cell function, modulates Wnt signaling in various tissues. Its regulation impacts tissue regeneration and has implications for conditions like Down
Area of Science:
- Stem cell biology
- Molecular and cellular biology
- Developmental biology
Background:
- Wnt pathway regulation in stem cells and tissues is not fully understood.
- Usp16 is a negative regulator of Bmi1/PRC1 function.
- Dysregulation of Wnt signaling is implicated in aging and diseases.
Purpose of the Study:
- To investigate the role of Usp16 in modulating the Wnt pathway.
- To explore the impact of Usp16 on stem cell expansion and self-renewal.
- To understand the implications of Usp16-Wnt pathway interactions in Down's Syndrome and other conditions.
Main Methods:
- Studied Usp16's effect on Wnt pathway in mammary epithelia, fibroblasts, and MEFs.
- Analyzed Wnt target gene expression (Axin2) and cell proliferation.
- Investigated Usp16's role in Cdkn2a activation and LRP6 phosphorylation.
- Utilized Ts65Dn mouse models for Down's Syndrome.
Main Results:
- Reduced Usp16 levels enhance Wnt responsiveness, leading to increased epithelial regeneration.
- Usp16 influences Wnt signaling via Cdkn2a and affects Rspo-mediated LRP6 phosphorylation.
- In Down's Syndrome models, Usp16 triplication dampens Wnt activation, which is restored by normalization.
- Upregulating Wnt signaling in Ts65Dn mice rescues mammary epithelial cell proliferation defects.
Conclusions:
- Usp16 acts as a key regulator of the Wnt pathway in stem cells and primary tissues.
- Findings link stem cell regulators (Bmi1/Usp16, Cdkn2a) to Wnt signaling.
- Usp16-Wnt pathway interactions offer therapeutic targets for Down's Syndrome, aging, and degenerative diseases.
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