Genotoxicity and cytotoxicity of antineoplastic drugs at environmentally relevant concentrations after long-term exposure
© The Author(s) 2024. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissionsoup.com..
Introduction: 5-fluorouracil (5-FU) and methotrexate (MTX) are the antineoplastic drugs most commonly used worldwide. Considered cytotoxic, these pharmaceuticals exhibit low specificity, causing damage not only to cancer cells but also to healthy cells in organisms. After being consumed and metabolized, these drugs are excreted through urine and feces, followed by wastewater treatment. However, conventional treatments do not have the capacity to completely remove these substances, risking their introduction into freshwater systems. This could pose a risk to human health even at low concentrations.
Aims: Thus, the present study aimed to investigate the genotoxicity, cytotoxicity, and mutagenicity of 5-FU and MTX at environmentally relevant concentrations after a long-term exposure, using adult male rats as an experimental model.
Methods: Male Wistar rats (70 days old) were distributed into 4 groups (n = 10/group): control, received only vehicle; MTX, received methotrexate at 10ngL-1; 5-FU received 5-fluorouracil at 10ngL-1; and MTX + 5-FU, received a combination of MTX and 5-FU at 10ngL-1 each. The period of exposure was from postnatal day (PND) 70 to PND 160, through drinking water. After that, the animals were euthanized and the samples (liver, testis, femoral bone marrow, and peripheral blood) were obtained.
Results: Increased DNA fragmentation was observed in the peripheral blood, liver, and testis, altering the parameters of the tail moment and tail intensity in the Comet assay. Besides, the change in the ratio between PCE and NCE indicates bone marrow suppression.
Conclusion: These findings warn the adverse effects for the general population worldwide chronically exposed to these drugs at trace concentration unintentionally.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:13 |
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| Enthalten in: |
Toxicology research - 13(2024), 2 vom: 15. März, Seite tfae049 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
da Cunha de Medeiros, P [VerfasserIn] |
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| Links: |
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| Themen: |
5-fluorouracil |
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| Anmerkungen: |
Date Revised 28.03.2024 published: Electronic-eCollection Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1093/toxres/tfae049 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a © The Author(s) 2024. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissionsoup.com. | ||
| 520 | |a Introduction: 5-fluorouracil (5-FU) and methotrexate (MTX) are the antineoplastic drugs most commonly used worldwide. Considered cytotoxic, these pharmaceuticals exhibit low specificity, causing damage not only to cancer cells but also to healthy cells in organisms. After being consumed and metabolized, these drugs are excreted through urine and feces, followed by wastewater treatment. However, conventional treatments do not have the capacity to completely remove these substances, risking their introduction into freshwater systems. This could pose a risk to human health even at low concentrations | ||
| 520 | |a Aims: Thus, the present study aimed to investigate the genotoxicity, cytotoxicity, and mutagenicity of 5-FU and MTX at environmentally relevant concentrations after a long-term exposure, using adult male rats as an experimental model | ||
| 520 | |a Methods: Male Wistar rats (70 days old) were distributed into 4 groups (n = 10/group): control, received only vehicle; MTX, received methotrexate at 10ngL-1; 5-FU received 5-fluorouracil at 10ngL-1; and MTX + 5-FU, received a combination of MTX and 5-FU at 10ngL-1 each. The period of exposure was from postnatal day (PND) 70 to PND 160, through drinking water. After that, the animals were euthanized and the samples (liver, testis, femoral bone marrow, and peripheral blood) were obtained | ||
| 520 | |a Results: Increased DNA fragmentation was observed in the peripheral blood, liver, and testis, altering the parameters of the tail moment and tail intensity in the Comet assay. Besides, the change in the ratio between PCE and NCE indicates bone marrow suppression | ||
| 520 | |a Conclusion: These findings warn the adverse effects for the general population worldwide chronically exposed to these drugs at trace concentration unintentionally | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a 5-fluorouracil | |
| 650 | 4 | |a DNA damage | |
| 650 | 4 | |a Emerging contaminants | |
| 650 | 4 | |a Genetic toxicology | |
| 650 | 4 | |a Methotrexate | |
| 650 | 4 | |a Rats | |
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| 700 | 1 | |a Barcelos, G R M |e verfasserin |4 aut | |
| 700 | 1 | |a Perobelli, J E |e verfasserin |4 aut | |
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