Journal
BIOPROCESS AND BIOSYSTEMS ENGINEERING
Volume 31, Issue 5, Pages 393-400Publisher
SPRINGER
DOI: 10.1007/s00449-007-0174-4
Keywords
bioreactor; cell aggregation; cell culture; neural stem cell
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Neural stem cells have been cultured as three-dimensional aggregates in a number of different types of bioreactors. The design and configuration of the bioreactor are shown to be crucial factors for the successful propagation of the cells. A novel bioreactor with liquid re-circulation and a working volume of 200 ml has been designed, tested and shown to be able to produce a higher cell vitality compared to those produced in multi-well plates, shake flasks and stirred flasks. The novel reactor was able to produce a total density of cells of 3.5 x 10(6) cells/ml consisting of a larger number of smaller and proliferative aggregates, compared to only 1.8 x 10(6) cells/ml produced in a multi-well plate. Shake flasks and stirred flasks commonly used for facilitating mass transfer in the culture of micro-organisms are shown to be unsuitable for the propagation of neural stem cells.
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