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Characterization in primary monolayer culture of separated cell types from rabbit endometrium

Summary. Epithelial cells and stromal cells of the rabbit endometrium were separated by successive enzymic digestion of the uterine mucosa. Isolated cell types were obtained in high yield, with good viability, and were maintained in monolayer cultures for up to 2 weeks. Epithelial cells in monolayers appeared as polygonal cells, displayed contact inhibition, and showed the presence of microvilli on the cell surface, with many desmosomes. Stromal cells grew rapidly to confluence, displayed overgrowth, and had a fibroblastic appearance with an absence of junctional complexes between cells. Indirect immunofluorescence showed uteroglobin on the surface of epithelial but not of stromal cells, and only epithelial cells secreted uteroglobin into the medium. These results confirm the identity of the cells and provide biochemical evidence for the epithelial cellular origin of uteroglobin. The method allows the culture of separate endometrial cell types, which retain their morphology and differentiated function in vitro.