Summary
Published in Advanced Materials Interfaces (2022), this peer-reviewed study used 3D Petri Dish® micro-molds to form scaffold-free 3D microtissues. Full citation: Sun, Shiyu, et al. Osteogenic Differentiated Human Bone Marrow Stem Cells Contribute to Sprouting Angiogenesis Deceleration via Paracrine Excreted IGFBP7
Osteogenic Differentiated Human Bone Marrow Stem Cells Contribute to Sprouting Angiogenesis Deceleration via Paracrine Excreted IGFBP7
Research Overview
Controlled tissue repair requires sprouting angiogenesis to slow and finally stop once blood vessels are rebuilt, but the mechanism behind that shutdown has been unclear. This study reports that osteogenic-differentiated bone marrow stem cells contribute by releasing intrinsic ‘OFF’ signals.
In vitro work identified insulin-like growth factor-binding protein 7 (IGFBP7) as the main paracrine component inhibiting endothelial tube formation, and functional experiments showed IGFBP7 suppresses sprouting angiogenesis by reducing cell migration and tip cell specification — defining a braking mechanism for vascular growth during bone repair.
Key Discoveries
- Osteogenic-differentiated bone marrow stem cells release 'OFF' signals that decelerate angiogenesis
- IGFBP7 identified as the main paracrine inhibitor of endothelial tube formation
- IGFBP7 acts by reducing endothelial migration and tip cell specification
