Application of paclitaxel in low non-cytotoxic doses supports vaccination with melanoma antigens in normal mice
Chemotherapeutic agents such as paclitaxel applied in ultra-low, non-cytotoxic doses were previously shown to stimulate dendritic cell activity and anti-tumor immune responses upon vaccination in mouse transplantable tumor models. However, the mechanisms of these alterations-termed chemoimmunomodula...
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| Hauptverfasser: | , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
27 Mar 2012
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| In: |
Journal of immunotoxicology
Year: 2012, Jahrgang: 9, Heft: 3, Pages: 275-281 |
| ISSN: | 1547-6901 |
| DOI: | 10.3109/1547691X.2012.655343 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.3109/1547691X.2012.655343 Verlag, kostenfrei, Volltext: https://doi.org/10.3109/1547691X.2012.655343 
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| Verfasserangaben: | Alexandra Sevko, Veronika Kremer, Christine Falk, Ludmila Umansky, Michael R. Shurin, Galina V. Shurin and Viktor Umansky |
MARC
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| 245 | 1 | 0 | |a Application of paclitaxel in low non-cytotoxic doses supports vaccination with melanoma antigens in normal mice |c Alexandra Sevko, Veronika Kremer, Christine Falk, Ludmila Umansky, Michael R. Shurin, Galina V. Shurin and Viktor Umansky |
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| 520 | |a Chemotherapeutic agents such as paclitaxel applied in ultra-low, non-cytotoxic doses were previously shown to stimulate dendritic cell activity and anti-tumor immune responses upon vaccination in mouse transplantable tumor models. However, the mechanisms of these alterations-termed chemoimmunomodulation or chemomodulation-are still not clear. This study investigated the effect of paclitaxel applied in ultra-low, non-cytotoxic doses on the efficiency of immunization of healthy C57BL/6 mice with the peptide derived from tyrosinase related protein (TRP)-2 as a model melanoma antigen. Using an IFNγ ELISPOT assay, it was found that administration of 1 mg paclitaxel/kg in combination with the peptide vaccination strongly increased the frequencies of TRP-2 specific spleen T-cells as compared to levels due to the vaccination alone. This was associated with a significant decrease in the levels of regulatory T-cells (Treg) and immature myeloid cells (known as a counterpart of myeloid derived suppressor cells [MDSC] in healthy mice). Such impairments of potential immunosuppressive cells were found to correlate with a strong increase in the amount of effector CD8+ and CD4+ T-cells in the bone marrow and spleen. Furthermore, in paclitaxel-treated mice, a significant augmentation of natural killer (NK) cell numbers in the bone marrow and their ability to produce IFNγ were observed. In addition, the level of NK-T-cells in the lymph nodes was also increased. It is suggested that paclitaxel applied in ultra-low, non-cytotoxic doses may potentially enhance the efficacy of anti-tumor vaccinations by neutralizing immunosuppressive Treg and MDSC populations in tumor-bearing hosts. | ||
| 650 | 4 | |a chemoimmunomodulation | |
| 650 | 4 | |a immature myeloid cells | |
| 650 | 4 | |a myeloid-derived suppressor cells | |
| 650 | 4 | |a Non-cytotoxic chemotherapy | |
| 650 | 4 | |a paclitaxel | |
| 650 | 4 | |a peptide immunization | |
| 650 | 4 | |a regulatory T-cells | |
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