Please use this identifier to cite or link to this item: http://dx.doi.org/10.18419/opus-1949
Hülser, Dieter F.
|Title:||Production of tissue plasminogen activator (t-PA) with differentiated F9-embryonic carcinoma cells grown as multicell spheroids|
|metadata.ubs.publikation.source:||Reuß, Matthias (Hrsg.): Biochemical engineering - Stuttgart : proceedings of the 2. International Symposium on Biochemical Engineering which was held at the Univ. of Stuttgart from March 5 to 7, 1990. Stuttgart : G. Fischer, 1991. - ISBN 3-437-30662-6, S. 220-223|
|Abstract:||F9 cells can only temporarily be cultivated as single cell suspension. The growth of multicell spheroids from a single cell suspension is shown. Within 24 hours the cells aggregated to multicell spheroids in spinner flasks. The aggregation was almost finished within 24 h and was independent of the initial cell concentration. but could be influenced by the geometry of the cultu re flask and the stirring velocity. A significant cell proliferation of the anchorage-dependent F9 cells was only detectable in the aggregated state. A narrow size distribution of multicell spheroids in a 3 days old culture revealed identical spheroid sizes. Under our conditions. with an inital cell density of 10 5 cells/ml a cell concentration of 6x10 6 cells/ml was reached within 4 days of spheroid culture. Cells in monolayers and in multicell spheroids were well coupled by gap junctions. Differentiated F9 cells showed a fibroblastoid morphology in contrast to the epitheloid morphology of undifferentiated F9 stem cells. This was not the case for multicell spheroids where the cells were also well coupled.|
|Appears in Collections:||04 Fakultät Energie-, Verfahrens- und Biotechnik|
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