Growth rate, labeling index, and radiation survival of cells grown in the matrigel threadin vitro tumor model
| Autor: | L. K. Chin, R. G. Steen, J. C. Livesey, D. Boyles, J. J. Casciari, J. S. Rasey |
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| Rok vydání: | 1995 |
| Předmět: |
Cell type
Magnetic Resonance Spectroscopy Cell Survival Cell Cell Culture Techniques Cell Count Biology Radiation Tolerance Mice Oxygen Consumption Radiation sensitivity Cricetinae Tumor Cells Cultured medicine Animals Cell Aggregation Matrigel Cell Membrane food and beverages Cell Biology General Medicine Anatomy In vitro Cell aggregation Culture Media Rats Drug Combinations medicine.anatomical_structure Cell culture Isotope Labeling Biophysics Proteoglycans Collagen Laminin Stem cell Cell Division Developmental Biology |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 1543-706X 1071-2690 |
| DOI: | 10.1007/bf02634310 |
| Popis: | Six rodent cell lines (36B10 rat glioma cells, 9L rat gliosarcoma cells, V79 Chinese hamster lung fibroblasts, EMT6/UW and EMT6/Ro mouse mammary sarcoma cells, and RIF-1 mouse fibrosarcoma cells) were tested for growth in cylindrical threads of Matrigel. These cells grew in the threads with doubling times of 17-23 h, reaching maximum cell densities on the order of 10(8) cells/ml. Histological sections of these threads showed a heterogeneous cell distribution: cells grew to confluence at the thread surface and at somewhat lower cell densities in the thread core. [H-3]thymidine labeling index and radiation sensitivity were measured for 9L and EMT6/UW cells in Matrigel threads. For both cell types, the labeling index in Matrigel was lower than observed in cell monolayers, with higher labeling indexes at the thread periphery than in the thread core. When these threads were grown in stirred medium, lower thread diameters, higher cell yields per thread, and higher labeling indices were obtained. EMT6 cell monolayers coated with Matrigel were less radiosensitive than cells in uncoated monolayers. This protective effect was eliminated by irradiating in the presence of 1 mg/ml misonidazole. EMT6 cells consume nearly three times as much oxygen (mole/cm3-sec) as do 9L cells, which are equally radiosensitive in monolayers with or without a Matrigel coating. The radiation sensitivity of EMT6/UW cells in Matrigel threads was similar to that for monolayers of plateau phase cells, whereas for 9L cells, the response in threads was more similar to exponentially growing cells. We conclude that Matrigel threads provide an alternative in vitro model for studying the radiation response of cells in a three-dimensional geometry. |
| Databáze: | OpenAIRE |
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