Methods of finding, selecting and studying cells in heterogeneous co-cultures
Co-cultures of heterogeneous cell populations in a diffusion-constrained microenvironment and methods for co-culturing are disclosed.
1. A method of co-culturing heterogeneous cells in a culture comprising at least one growth-promoting cell and at least one cell having proliferative capacity, the method comprising the steps of:
seeding the heterogeneous cells in a microchannel having constant length, width and height that defines a fluid microenvironment comprising components; and
incubating the heterogeneous cells in the fluid microenvironment under conditions such that the components move in the entire culture only via diffusion for a time sufficient to proliferate the at least one proliferative cell.
2. A method as claimed in claim 1 , wherein the heterogeneous cells derive from a single source.
3. A method as claimed in claim 2 , wherein the single source is a culture of primary cells from a tissue.
4. A method as claimed in claim 3 , wherein the culture of primary cells comprises cells that have migrated out of a tissue.
5. A method as claimed in claim 3 , wherein the culture of primary cells comprises a suspension of cells from a tissue.
6. A method as claimed in claim 5 , wherein the suspension is obtained by disaggregating a tissue.
7. A method as claimed in claim 5 , wherein the suspension is obtained by digesting a tissue with an enzyme.
8. A method as claimed in claim 3 , wherein the primary cell culture comprises cells selected from the group consisting of epithelial cells and stromal cells.
9. A method as claimed in claim 1 , wherein different cell types of the heterogeneous cells derive from different sources.
10. A method as claimed in claim 9 , wherein at least one source is primary cells from a tissue.
11. A method as claimed in claim 9 , wherein at least one source is a cultured cell.
12. A method as claimed in claim 9 , wherein at least one source is a selected cell sub-population.
13. A method as claimed in claim 1 , wherein the at least one growth-promoting cell and the at least one cell having proliferative capacity are in cell-to-cell contact.
14. A method as claimed in claim 1 , wherein the at least one growth-promoting cell and the at least one cell having proliferative capacity are spaced apart.
15. A method as claimed in claim 1 , wherein the at least one cell having proliferative capacity is responsive to a soluble molecule secreted by the at least one growth-promoting cell.
16. A method as claimed in claim 1 , wherein the method further comprises the step of introducing into the culture a soluble molecule that affects at least one cell type in the culture.
17. A method as claimed in claim 1 , wherein the length is about 20 mm, the width is about 1 mm and the height is about 0.25 mm.
18. A method as claimed in claim 1 , wherein different cell types of the heterogeneous cells derive from the same source.
19. A method as claimed in claim 1 , wherein a single cell type of the heterogeneous cells derives from different sources.