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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Li, Song-Tao Liu, Yong Zhou, Qiang Lue, Ren-Fa Song, Lei Dong, Shi-Wu Guo, Ping Kopjar, Branko |
| Description | Author Affiliation: Li ST ( 1 National & Regional United Engineering Laboratory of Tissue Engineering, Department of Orthopaedics, Southwest Hospital, Third Military Medical University , P.R. China .) |
| Abstract | This study introduced a prototype of an axial-stress bioreactor system that supports long-term growth and development of engineered tissues. The main features of this bioreactor are an integrated substance exchanger and feedback control of pH and $PO_{2}.$ A 21-day study was conducted to validate the system's ability to maintain a stable environment, while remaining sterile. Our results showed that the pH, $PO_{2},$ and nutrient (glucose) remained balanced at appropriate levels, while metabolic waste (lactic acid) was removed. No bacteria or fungi were detected in the system or tissue; thus, demonstrating that it was sterile. These data indicate the bioreactor's strong potential for long-term tissue culture. To explore this idea, the effect of dynamic culture, including cyclic compression and automatic substance exchange, on mouse bone-marrow mesenchymal stem cells (BMSCs) seeded in decalcified bone matrix was studied using the bioreactor prototype. Histological sections of the engineered tissues showed higher cell densities in scaffolds in dynamic culture compared to those in static culture, while cell cycle analysis showed that dynamic culture promoted BMSC proliferation (proliferation index, PI=34.02±1.77) more effectively than static culture (PI=26.66±1.81). The results from a methyl thiazolyl tetrazolium assay were consistent with the loading experimental data. Furthermore, elevated alkaline phosphatase activity and calcium content were observed in dynamic condition compared to static culture. In conclusion, this bioreactor system supplies a method of modulating the pH and $PO_{2}$ in defined ranges with only small fluctuations; it can be used as a physiological or pathological analog. Automatic control of the environment is a practical solution for long-term, steady-state culture for future commercialization. |
| File Format | HTM / HTML |
| ISSN | 21524947 |
| Issue Number | 3 |
| Volume Number | 20 |
| e-ISSN | 21524955 |
| Journal | Tissue Engineering Part C: Methods |
| Language | English |
| Publisher | Mary Ann Liebert |
| Publisher Date | 2014-03-01 |
| Publisher Place | United States |
| Access Restriction | Subscribed |
| Subject Keyword | Discipline Biotechnology Bioreactors Stress, Mechanical Tissue Engineering Instrumentation Methods Tissue Scaffolds Chemistry Alkaline Phosphatase Metabolism Animals Bone Marrow Cells Cytology Enzymology Bone Matrix Cattle Cell Count Cell Cycle Cell Differentiation Cell Proliferation Hydrogen-ion Concentration Mesenchymal Stromal Cells Mice Mice, Inbred C57bl Osteogenesis Oxygen Partial Pressure Reproducibility Of Results Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
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