Figure 4.
Characterization of the BLT Sandwich culture system. A: Representative phase contrast and fluorescence images showing the proliferation and presence of Lgr5-GFP of IEC monolayer at day 4. Contour of epithelial island/monolayer is delineated by dashed lines in phase contrast images for better visualization. Zoomed-in view depicts the undulating pattern of IEC monolayer/sheet that is closely associated with Lgr5-GFP+ cells. B1: Confocal images comparing the expression of Lgr5 and Ki67 between 2D Sandwich and 3D Matrigel culture systems at day 4 (a); B2–3: Flow cytometry results comparing the level of Ki67+ cells (B2) and Lgr5/Ki67 co-positive cells (B3) between the two culture systems. Mean ± SEM, averaged from n = 3–4 independent trials with different SI organoid donor mice.