In vitro characterization of cells derived from chordoma cell line U-CH1 following treatment with X-rays, heavy ions and chemotherapeutic drugs
説明
<jats:title>Abstract</jats:title> <jats:sec> <jats:title>Background</jats:title> <jats:p>Chordoma, a rare cancer, is usually treated with surgery and/or radiation. However, very limited characterizations of chordoma cells are available due to a minimal availability (only two lines validated by now) and the extremely long doubling time. In order to overcome this situation, we successfully derived a cell line with a shorter doubling time from the first validated chordoma line U-CH1 and obtained invaluable cell biological data.</jats:p> </jats:sec> <jats:sec> <jats:title>Method</jats:title> <jats:p>After isolating a subpopulation of U-CH1 cells with a short doubling time (U-CH1-N), cell growth, cell cycle distribution, DNA content, chromosome number, p53 status, and cell survival were examined after exposure to X-rays, heavy ions, camptothecin, mitomycin C, cisplatin and bleocin. These data were compared with those of HeLa (cervical cancer) and U87-MG (glioblastoma) cells.</jats:p> </jats:sec> <jats:sec> <jats:title>Results</jats:title> <jats:p>The cell doubling times for HeLa, U87-MG and U-CH1-N were approximately 18 h, 24 h and 3 days respectively. Heavy ion irradiation resulted in more efficient cell killing than x-rays in all three cell lines. Relative biological effectiveness (RBE) at 10% survival for U-CH1-N was about 2.45 for 70 keV/μm carbon and 3.86 for 200 keV/μm iron ions. Of the four chemicals, bleocin showed the most marked cytotoxic effect on U-CH1-N.</jats:p> </jats:sec> <jats:sec> <jats:title>Conclusion</jats:title> <jats:p>Our data provide the first comprehensive cellular characterization using cells of chordoma origin and furnish the biological basis for successful clinical results of chordoma treatment by heavy ions.</jats:p> </jats:sec>
収録刊行物
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- Radiation Oncology
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Radiation Oncology 6 (1), 116-, 2011-09-14
Springer Science and Business Media LLC
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キーワード
- Time Factors
- R895-920
- Antineoplastic Agents
- Bone Neoplasms
- In Vitro Techniques
- Chromosomes
- Medical physics. Medical radiology. Nuclear medicine
- Cell Line, Tumor
- Chordoma
- Humans
- RC254-282
- Research
- X-Rays
- Cell Cycle
- Neoplasms. Tumors. Oncology. Including cancer and carcinogens
- Reproducibility of Results
- Flow Cytometry
- Oncology
- Radiology Nuclear Medicine and imaging
- Karyotyping
- Tumor Suppressor Protein p53
- Relative Biological Effectiveness
- HeLa Cells
