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Updated: Jun 13, 2026
08:01
Stimulation of Notch Signaling in Mouse Osteoclast Precursors
Published on: February 28, 2017
Gs signaling in osteoblasts and hematopoietic stem cells
1Harvard Medical School, Boston, Massachusetts, USA. hkronenberg@partners.org
Annals of the New York Academy of Sciences
|April 16, 2010
Summary
The Gs alpha subunit is crucial for bone and blood cell development. Its absence impairs osteoblast differentiation and hematopoietic stem cell homing to bone marrow.
Area of Science:
- Molecular Biology
- Cell Biology
- Immunology
Background:
- The heterotrimeric G protein Gs mediates signals from G protein-coupled receptors.
- Gs is vital for cells in the osteoblast lineage, impacting bone formation.
- Understanding Gs's role in bone and immune cell development is critical.
Purpose of the Study:
- To investigate the role of the Gs alpha subunit (Gsalpha) in osteoblast and hematopoietic stem cell function.
- To determine the necessity of Gsalpha in osteoblastic and hematopoietic stem cells for their development and homing.
Main Methods:
- Generation of chimeric mice with Gsalpha-deficient embryonic stem cells.
- Utilizing the Cre-lox system to specifically delete Gsalpha in osteoblast lineage and hematopoietic stem cells.
Main Results:
- Gsalpha-deficient cells showed limited contribution to cortical osteoblasts and marrow hematopoietic cells.
- Deletion of Gsalpha in osteoblastic cells impaired osteoblast differentiation and B-cell development.
- Gsalpha is essential for hematopoietic stem cell homing to the bone marrow.
Conclusions:
- Gsalpha plays indispensable roles in both osteoblast differentiation and hematopoietic stem cell homing.
- Targeting Gsalpha signaling may offer therapeutic strategies for bone and hematological disorders.
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