Cells were seeded on Matrigel (Growth Factor Reduced Matrigel, BD Biosciences, Franklin Lakes, NJ, USA) using 2% Matrigel DMEM media supplemented with 10% fetal bovine serum and penicillin/streptomycin. Immunostaining with cell-based organoids was performed following a previously published protocol.36 (link) Primary antibodies used were anti-E-cadherin (BD Bioscience, 610181) and anti-F-actin (Thermo Fisher, A12381). Images were acquired using a Zeiss LSM 510 microscope and analyzed with ImageJ software.