Generation of Three-Dimensional Spheroids/Organoids from Two-Dimensional Cell Cultures Using a Novel Stamp Device.

Three-dimensional (3D) cell cultures provide a more accurate representation of the in vivo microenvironment than conventional two-dimensional (2D) cultures, since they promote enhanced interactions among cells and the extracellular matrix. This study aimed to develop an efficient, cost-effective, and reproducible methodology to generate 3D cell structures (spheroids/organoids) using an innovative stamp-based system to create microwells in agarose molds.A novel stamp was used to produce 663 microwells per well of a 6-well plate, providing an ideal environment for cell aggregation. Primary porcine pancreatic islet cells were seeded into these microwells, where they aggregated to form spheroids/organoids. The cultures were incubated at 37 °C under 5% CO2, and the medium was replaced every 3 days. Spheroid formation was periodically monitored, and samples were collected for characterization. The method successfully generated uniform and high-quality spheroids, reducing experimental variability, minimizing manipulation, and enhancing cell interactions. The use of agarose-based micropattern molds provided a simplified, controlled environment for 3D cultures, offering a standardized and cost-effective solution.This methodology supports applications for drug testing and tissue engineering, offering a practical and scalable platform for 3D cell culture models that can be easily implemented in various laboratory settings.