Summary
Published in Biophysics (2020), this peer-reviewed study used 3D Petri Dish® micro-molds to form scaffold-free 3D microtissues. Full citation: Volkova, M. V., et al. Adaptation of Bio-Layer Interferometry for Quantitative Assessment of the Vascular Endothelial Growth Factor Content in Cell-Conditioned Culture Medium
Adaptation of Bio-Layer Interferometry for Quantitative Assessment of the Vascular Endothelial Growth Factor Content in Cell-Conditioned Culture Medium
Research Overview
Measuring secreted proteins like VEGF-A normally means multi-stage assays that take hours. This study adapted biolayer interferometry to quantify an analyte within minutes, using conditioned media from mouse mesenchymal stem cells grown under normoxia and hypoxia — as monolayers, 3D cell sheets, or 3D spheroids — as the model system.
The method detected VEGF-A down to at least 0.10 ng/mL, and the concentrations measured agreed closely with enzyme immunoassay values. Because the 3D formats condition media differently than monolayers, the rapid readout offers a practical way to track how culture geometry shapes growth-factor secretion.
Key Discoveries
- Biolayer interferometry quantified VEGF-A in minutes at ≥0.10 ng/mL sensitivity
- Results matched conventional enzyme immunoassay values
- Compared secretion across monolayer, 3D cell sheet, and 3D spheroid mesenchymal stem cell cultures
