Summary
Published in Journal of Mass Spectrometry (2022), this peer-reviewed study used 3D Petri Dish® micro-molds to form scaffold-free 3D microtissues. Full citation: Tobias, Fernando, et al. Lipidomic comparison of 2D and 3D colon cancer cell culture models
Lipidomic comparison of 2D and 3D colon cancer cell culture models
Research Overview
Altered lipid metabolism is a hallmark of cancer, so this study compared lipidomic profiles between 2D monolayers and multicellular tumor spheroids of the HCT 116 colon carcinoma line. Serial trypsinization peeled the spheroids into three cellular populations corresponding to their proliferative, quiescent, and necrotic regions.
That layer-by-layer separation allowed comprehensive identification and quantification of lipids in each spheroid zone versus 2D culture. Lipid subclasses associated with lipid droplets formed in the oxygen-restricted, acidic regions of spheroids and were produced at higher levels than in 2D — metabolic behavior that flat culture cannot reveal.
Key Discoveries
- Serial trypsinization separated spheroids into proliferative, quiescent, and necrotic populations
- Lipid droplet-associated subclasses concentrated in oxygen-restricted, acidic spheroid regions
- Spheroid lipid production exceeded 2D monolayer levels, revealing microenvironment-driven metabolism
