Restricted accessResearch articleFirst published online 2004-11
Hydrodynamic Stimulation and Long Term Cultivation of Nucleus Pulposus Cells: A New Bioreactor System to Induce Extracellular Matrix Synthesis by Nucleus Pulposus Cells Dependent on Intermittent Hydrostatic Pressure
A novel bioreactor system was constructed to induce extracellular matrix (ECM) synthesis by intervertebral disc (ID) cells due to intermittent hydrostatic pressure. The developed system is completely sterilizable and reusable. It is viable for cultivation, immobilization, and stimulation of various other cell types and tissues especially for cartilage. The custom made lid allows long-run cultivation through semi-continuous operation. Manual interferences and therefore the risk of contamination are reduced. Sampling, medium changing and addition of supplements are easily performed from the connected conditioning vessel, which could be placed in an incubator.
For the present investigations nucleus pulposus cells from pigs were taken and immobilized in agarose to obtain three-dimensional cell matrix constructs which were subjected to intermittent hydrostatic pressure. Afterwards the construct was biochemically examined. The proven constituents of ECM were found to be released in dependence of the magnitude and profile of the applied pressure.
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