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A Simple Pit Assay Protocol to Visualize and Quantify Osteoclastic Resorption In Vitro
Published on: June 16, 2022
A novel resorption assay for osteoclast functionality based on an osteoblast-derived native extracellular matrix.
Anne-Helen Lutter1, Ute Hempel, Cornelia Wolf-Brandstetter
1Medical Faculty Carl Gustav Carus, Institute of Physiological Chemistry, Dresden University of Technology, Fiedlerstrasse 42, 01307 Dresden, Germany. ute.hempel@tu-dresden.de
Journal of Cellular Biochemistry
|January 29, 2010
Summary
A new assay uses decellularized osteoblast matrix to quantify osteoclast bone resorption. This method accurately measures osteoclast activity and inhibition, advancing bone disease research.
Area of Science:
- Biochemistry
- Cell Biology
- Biomaterials
Background:
- Osteoclasts are crucial for bone remodeling and diseases.
- Current assays for osteoclast function are limited.
- A quantitative functional resorption assay is needed.
Purpose of the Study:
- To develop and validate a novel, quantitative, functional osteoclast resorption assay.
- To utilize decellularized osteoblast-derived matrix for this assay.
- To assess the assay's performance with cell lines and primary cells.
Main Methods:
- Osteoblast-derived extracellular matrix (ECM) was synthesized using SaOS-2 cells.
- Decellularized ECM was used as a substrate for osteoclast precursors.
- Resorption pits were quantified using densitometry after von Kossa staining.
Main Results:
- RAW 264.7 cells demonstrated continuous matrix resorption.
- Resorption was dose-dependent on M-CSF and inhibited by IFN-gamma.
- The assay successfully worked with primary human and mouse osteoclast precursors.
Conclusions:
- The novel assay provides a quantitative, functional, and easy-to-use method for studying osteoclast biology.
- This assay can advance the analysis of bone remodeling and catabolic bone diseases.
- The assay is cost-effective and versatile for different cell types.
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