title: Establishment and quantitative imaging of a 3D lung organotypic model of mammary tumor outgrowth.
abstract: The lung is the second most common site of metastatic spread in breast cancer and experimental evidence has been provided in many systems for the importance of an organ-specific microenvironment in the development of metastasis. To better understand the interaction between tumor and host cells in this important secondary site, we have developed a 3D in vitro organotypic model of breast tumor metastatic growth in the lung. In our model, cells isolated from mouse lungs are placed in a collagen sponge to serve as a scaffold and co-cultured with a green fluorescent protein-labeled polyoma virus middle T antigen (PyVT) mammary tumor cell line. Analysis of the co-culture system was performed using flow cytometry to determine the relative constitution of the co-cultures over time. This analysis determined that the cultures consisted of viable lung and breast cancer cells over a 5-day period. Confocal microscopy was then used to perform live cell imaging of the co-cultures over time. Our studies determined that host lung cells influence the ability of tumor cells to grow, as the presence of lung parenchyma positively affected the proliferation of the mammary tumor cells in culture. In summary, we have developed a novel in vitro model of breast tumor cells in a common metastatic site that can be used to study tumor/host interactions in an important microenvironment.
authors.affiliation: Department of Cancer Biology, Vanderbilt University, 771 Preston Research Building, 2220 Pierce Avenue, Nashville, TN 37212, USA. michelle.d.martin@vanderbilt.edu
authors.forename: Michelle D
authors.initials: MD
authors.lastname: Martin
authors.forename: Barbara
authors.initials: B
authors.lastname: Fingleton
authors.forename: Conor C
authors.initials: CC
authors.lastname: Lynch
authors.forename: Sam
authors.initials: S
authors.lastname: Wells
authors.forename: J Oliver
authors.initials: JO
authors.lastname: McIntyre
authors.forename: David W
authors.initials: DW
authors.lastname: Piston
authors.forename: Lynn M
authors.initials: LM
authors.lastname: Matrisian
mesh_terms: D000818:Animals; D018920:Coculture Techniques; D003952:Diagnostic Imaging; D004195:Disease Models, Animal; D018450:Disease Progression; D005260:Female; D005434:Flow Cytometry; D049452:Green Fluorescent Proteins / Q000235:genetics / Q000378:metabolism; D021621:Imaging, Three-Dimensional; D007124:Immunoenzyme Techniques; D008175:Lung Neoplasms / Q000378:metabolism / Q000556:secondary*; D008325:Mammary Neoplasms, Experimental / Q000378:metabolism / Q000473:pathology*; D008324:Mammary Tumor Virus, Mouse / Q000235:genetics; D051379:Mice; D008810:Mice, Inbred C57BL; D008819:Mice, Nude; D008822:Mice, Transgenic; D018613:Microscopy, Confocal; D009924:Organ Culture Techniques; D014407:Tumor Cells, Cultured
chemical_list: D049452:Green Fluorescent Proteins
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