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Article Open Access

DHFR-mediated effects of methotrexate in medulloblastoma and osteosarcoma cells: The same outcome of treatment with different doses in sensitive cell lines

  • Authors:
    • Jakub Neradil
    • Gabriela Pavlasova
    • Martin Sramek
    • Michal Kyr
    • Renata Veselska
    • Jaroslav Sterba
  • View Affiliations / Copyright

    Affiliations: Department of Experimental Biology, School of Science, Masaryk University, Brno, Czech Republic, Department of Pediatric Oncology, University Hospital Brno and School of Medicine, Masaryk University, Brno, Czech Republic, Regional Centre for Applied Molecular Oncology, Masaryk Memorial Cancer Institute, Brno, Czech Republic
    Copyright: © Neradil et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].
  • Pages: 2169-2175
    |
    Published online on: February 26, 2015
       https://doi.org/10.3892/or.2015.3819
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Abstract

Although methotrexate (MTX) is the most well‑known antifolate included in many standard therapeutic regimens, substantial toxicity limits its wider use, particularly in pediatric oncology. Our study focused on a detailed analysis of MTX effects in cell lines derived from two types of pediatric solid tumors: medulloblastoma and osteosarcoma. The main aim of this study was to analyze the effects of treatment with MTX at concentrations comparable to MTX plasma levels in patients treated with high-dose or low-dose MTX. The results showed that treatment with MTX significantly decreased proliferation activity, inhibited the cell cycle at S-phase and induced apoptosis in Daoy and Saos-2 reference cell lines, which were found to be MTX-sensitive. Furthermore, no difference in these effects was observed following treatment with various doses of MTX ranging from 1 to 40 µM. These findings suggest the possibility of achieving the same outcome with the application of low-dose MTX, an extremely important result, particularly for clinical practice. Another important aspect of treatment with high-dose MTX in clinical practice is the administration of leucovorin (LV) as an antidote to reduce MTX toxicity in normal cells. For this reason, the combined application of MTX and LV was also included in our experiments; however, this application of MTX together with LV did not elicit any detectable effect. The expression analysis of genes involved in the mechanisms of resistance to MTX was a final component of our study, and the results helped us to elucidate the mechanisms of the various responses to MTX among the cell lines included in our study.
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Copy and paste a formatted citation
Spandidos Publications style
Neradil J, Pavlasova G, Sramek M, Kyr M, Veselska R and Sterba J: DHFR-mediated effects of methotrexate in medulloblastoma and osteosarcoma cells: The same outcome of treatment with different doses in sensitive cell lines. Oncol Rep 33: 2169-2175, 2015.
APA
Neradil, J., Pavlasova, G., Sramek, M., Kyr, M., Veselska, R., & Sterba, J. (2015). DHFR-mediated effects of methotrexate in medulloblastoma and osteosarcoma cells: The same outcome of treatment with different doses in sensitive cell lines. Oncology Reports, 33, 2169-2175. https://doi.org/10.3892/or.2015.3819
MLA
Neradil, J., Pavlasova, G., Sramek, M., Kyr, M., Veselska, R., Sterba, J."DHFR-mediated effects of methotrexate in medulloblastoma and osteosarcoma cells: The same outcome of treatment with different doses in sensitive cell lines". Oncology Reports 33.5 (2015): 2169-2175.
Chicago
Neradil, J., Pavlasova, G., Sramek, M., Kyr, M., Veselska, R., Sterba, J."DHFR-mediated effects of methotrexate in medulloblastoma and osteosarcoma cells: The same outcome of treatment with different doses in sensitive cell lines". Oncology Reports 33, no. 5 (2015): 2169-2175. https://doi.org/10.3892/or.2015.3819
Copy and paste a formatted citation
x
Spandidos Publications style
Neradil J, Pavlasova G, Sramek M, Kyr M, Veselska R and Sterba J: DHFR-mediated effects of methotrexate in medulloblastoma and osteosarcoma cells: The same outcome of treatment with different doses in sensitive cell lines. Oncol Rep 33: 2169-2175, 2015.
APA
Neradil, J., Pavlasova, G., Sramek, M., Kyr, M., Veselska, R., & Sterba, J. (2015). DHFR-mediated effects of methotrexate in medulloblastoma and osteosarcoma cells: The same outcome of treatment with different doses in sensitive cell lines. Oncology Reports, 33, 2169-2175. https://doi.org/10.3892/or.2015.3819
MLA
Neradil, J., Pavlasova, G., Sramek, M., Kyr, M., Veselska, R., Sterba, J."DHFR-mediated effects of methotrexate in medulloblastoma and osteosarcoma cells: The same outcome of treatment with different doses in sensitive cell lines". Oncology Reports 33.5 (2015): 2169-2175.
Chicago
Neradil, J., Pavlasova, G., Sramek, M., Kyr, M., Veselska, R., Sterba, J."DHFR-mediated effects of methotrexate in medulloblastoma and osteosarcoma cells: The same outcome of treatment with different doses in sensitive cell lines". Oncology Reports 33, no. 5 (2015): 2169-2175. https://doi.org/10.3892/or.2015.3819
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