Teratocarcinoma differentiation: plasminogen activator activity associated with embryoid body formation.

Published

Journal Article

Changes in plasminogen activator activity have been examined as a clonal line of mouse embryonal carcinoma cells aggregate and differentiate to form cystic embryoid bodies in vitro. Within the first 10 days of study, the pluripotent embryonal carcinoma cells aggregate; a layer of endodermal cells appears on the outside of the aggregate forming an embryoid body; a basement membrane forms between the outer layer of endodermal cells and the internal cells; a cyst forms within the embryoid body; and the internal cells assume a columnar appearance along the inner portion of the basement membrane. After the formation of the endodermal layer, there is a rise in intracellular plasminogen activator activity. This rise continues for up to 25 days in culture, providing that the three-dimensional integrity of the embryoid bodies is maintained by culturing them on bacterial petri dishes. Selective removal of the outer endodermal layer of cells reduces the plasminogen activatory activity of the resulting embryoid body cores. Intracellular and secreted plasminogen activator activity of simple embryoid bodies composed of only two cell types can be increased by culturing the embryoid bodies in dbcAMP, theophylline, or cholera toxin. These results suggest that the embryoid body endodermal cells are the source of a cAMP-inducible plasminogen activator activity.

Full Text

Duke Authors

Cited Authors

  • Linney, E; Levinson, BB

Published Date

  • February 1, 1977

Published In

Volume / Issue

  • 10 / 2

Start / End Page

  • 297 - 304

PubMed ID

  • 189937

Pubmed Central ID

  • 189937

International Standard Serial Number (ISSN)

  • 0092-8674

Digital Object Identifier (DOI)

  • 10.1016/0092-8674(77)90223-9

Language

  • eng

Conference Location

  • United States