Rethinking Organoid Culture: How Bacterial Proteins Enable Animal-Free 2D and 3D Systems

Organoids have become indispensable tools in fundamental research and personalized medicine—but many labs still rely on animal-derived matrices (Matrigel) that are expensive, variable, and difficult to standardize. What if one simpel recombinant protein could offer a smarter alternative? Recent advances show that the bacterial protein invasin can be repurposed to support robust organoid growth in fully defined, animal-free systems. From 2D monolayers suited for high-throughput screening to long-term 3D cultures using a synthetic PIC gel, these approaches combine practicality with physiological relevance. Together, they pave the way toward standardized organoid culture, reduced reliance on animal-derived materials, and open new possibilities for innovative applications of organoid technology.

– Joost Wijnakker