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Updated: Aug 13, 2025
10:23
Covalent Binding of BMP-2 on Surfaces Using a Self-assembled Monolayer Approach
Published on: August 26, 2013
14.1K
Interplay between integrins and cadherins to control bone differentiation upon BMP-2 stimulation.
Anne Valat1, Laure Fourel1, Adria Sales2
1Grenoble Institute of Engineering, CNRS UMR 5628, LMGP, Grenoble, France.
Frontiers in Cell and Developmental Biology
|January 23, 2023
Summary
Bone morphogenetic protein-2 (BMP-2) triggers a switch in cell adhesion molecules, specifically integrins and cadherins, during muscle to bone cell transdifferentiation. This molecular shift is crucial for guiding osteogenic programming and cell fate.
Area of Science:
- Biochemistry
- Cell Biology
- Biomaterials Science
Background:
- Osteoblastic lineage commitment in C2C12 myoblasts upon BMP-2 stimulation involves microenvironmental changes over several days.
- The precise mechanisms by which BMP-2 alters cellular adhesion machinery to drive bone cell fate remain incompletely understood.
Purpose of the Study:
- To investigate how BMP-2 influences cell adhesion molecules during muscle to bone transdifferentiation.
- To compare the effects of BMP-2 delivered in solution versus bound to a biomimetic film, mimicking extracellular matrix presentation.
Main Methods:
- Utilized automated methods for biomimetic film preparation for high-content cellular studies.
- Performed comparative gene expression analysis using RNA sequencing and quantitative PCR for transcription factors, integrins (β1, β3, β5), and cadherins (M, N, Cad11).
- Quantified extracellular matrix proteins and adhesion receptors via Western and dot blots, analyzed spatial organization using immuno-stainings, and assessed receptor function using silencing RNA.
Main Results:
- A switch in integrin and cadherin expression was observed during BMP-2-induced muscle to bone transdifferentiation, irrespective of BMP-2 presentation mode.
- C2C12 cells shifted from expressing M-cadherin and laminin-specific integrins to cadherin-11 and collagen-specific integrins.
- Biomimetic films revealed specific roles of adhesive receptors in regulating osteogenic transcription factors (pSMAD1,5,9, RunX2, osterix) and alkaline phosphatase activity.
Conclusions:
- Integrins and cadherins cooperate with distinct functions to drive osteogenic programming during BMP-2-mediated transdifferentiation.
- Specific integrin-cadherin pairs (β3/Cadherin-11, β1/Cadherin-11) play critical roles in early signaling, transcription factor activity, and extracellular matrix organization.
- Biomimetic films are valuable tools for dissecting the specific molecular events in BMP-2-driven cell fate determination.
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