Research Article
Role of CEACAM1, ECM, and Mesenchymal Stem Cells in an Orthotopic Model of Human Breast Cancer
Table 3
Characterization and optimization of an in vivo mammary gland morphogenesis model1.
| MEC | Stromal cells | ECM | Outcome |
| Humanized mammary fat pads | None | hTert MSC | ECM or None | No growth | + | hTert MSC | Col I plus matrigel | Slow growth of xenografts (10 weeks) and differentiation into striated epithelium |
| Normal mouse mammary fat pads | + | hTert MSC | Col I plus matrigel | Rapid xenograft growth (8 weeks) and differentiation into striated epithelium | + | hTert MSC | None | Low engraftment (3 out 8 animals) and lack of differentiation | + | None | Col I plus matrigel | Small xenografts (1-2 mm) and lack of differentiation | + | None | Matrigel | Small xenografts (1-2 mm), but formation of acni and clusters of cells | + | RMF/EG | Matrigel/No ECM | Larger xenografts (5–10 mm), but outgrowth of fibroblasts | + | hTert MSC | Matrigel | Growth of xenografts (5 mm) and differentiation epithelial cells |
| Pregnant mammary fat pads | + | hTert MSC | Matrigel | Growth of xenografts (5 mm) and formation of lumen |
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1+ indicates MCF-7 transfected with CEACAM1-4S.
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