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Investigation of the Genotoxic Potential of the Marine Toxin C17-SAMT Using the In Vivo Comet and Micronucleus Assays

The contaminant responsible for the atypical toxicity reported in mussels from Bizerte Lagoon (Northern Tunisia) during the last decade has been characterized as C17-sphinganine analog mycotoxin (C17-SAMT). This neurotoxin showed common mouse toxic symptoms, including flaccid paralysis and severe dy...

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Autores principales: Marzougui, Zeineb, Huet, Sylvie, Blier, Anne-Louise, Hégarat, Ludovic Le, Tounsi-Kettiti, Haïfa, Kharrat, Riadh, Marrouchi, Riadh, Fessard, Valérie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9604968/
https://www.ncbi.nlm.nih.gov/pubmed/36286443
http://dx.doi.org/10.3390/md20100619
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author Marzougui, Zeineb
Huet, Sylvie
Blier, Anne-Louise
Hégarat, Ludovic Le
Tounsi-Kettiti, Haïfa
Kharrat, Riadh
Marrouchi, Riadh
Fessard, Valérie
author_facet Marzougui, Zeineb
Huet, Sylvie
Blier, Anne-Louise
Hégarat, Ludovic Le
Tounsi-Kettiti, Haïfa
Kharrat, Riadh
Marrouchi, Riadh
Fessard, Valérie
author_sort Marzougui, Zeineb
collection PubMed
description The contaminant responsible for the atypical toxicity reported in mussels from Bizerte Lagoon (Northern Tunisia) during the last decade has been characterized as C17-sphinganine analog mycotoxin (C17-SAMT). This neurotoxin showed common mouse toxic symptoms, including flaccid paralysis and severe dyspnea, followed by rapid death. For hazard assessment on human health, in this work we aimed to evaluate the in vivo genotoxic effects of this marine biotoxin using the classical alkaline and modified Fpg comet assays performed to detect DNA breaks and alkali-labile sites as well as oxidized bases. The micronucleus assay was used on bone marrow to detect chromosome and genome damage. C17-SAMT induces a statistically insignificant increase in DNA tail intensity at all doses in the duodenum, and in the spleen contrary to the liver, the percentage of tail DNA increased significantly at the mid dose of 300 µg/kg b.w/d. C17-SAMT did not affect the number of micronuclei in the bone marrow. Microscopic observations of the liver showed an increase in the number of mitosis and hepatocytes’ cytoplasm clarification. At this level of study, we confirm that C17-SAMT induced DNA damage in the liver but there was no evidence of effects causing DNA oxidation or chromosome and genome damage.
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spelling pubmed-96049682022-10-27 Investigation of the Genotoxic Potential of the Marine Toxin C17-SAMT Using the In Vivo Comet and Micronucleus Assays Marzougui, Zeineb Huet, Sylvie Blier, Anne-Louise Hégarat, Ludovic Le Tounsi-Kettiti, Haïfa Kharrat, Riadh Marrouchi, Riadh Fessard, Valérie Mar Drugs Article The contaminant responsible for the atypical toxicity reported in mussels from Bizerte Lagoon (Northern Tunisia) during the last decade has been characterized as C17-sphinganine analog mycotoxin (C17-SAMT). This neurotoxin showed common mouse toxic symptoms, including flaccid paralysis and severe dyspnea, followed by rapid death. For hazard assessment on human health, in this work we aimed to evaluate the in vivo genotoxic effects of this marine biotoxin using the classical alkaline and modified Fpg comet assays performed to detect DNA breaks and alkali-labile sites as well as oxidized bases. The micronucleus assay was used on bone marrow to detect chromosome and genome damage. C17-SAMT induces a statistically insignificant increase in DNA tail intensity at all doses in the duodenum, and in the spleen contrary to the liver, the percentage of tail DNA increased significantly at the mid dose of 300 µg/kg b.w/d. C17-SAMT did not affect the number of micronuclei in the bone marrow. Microscopic observations of the liver showed an increase in the number of mitosis and hepatocytes’ cytoplasm clarification. At this level of study, we confirm that C17-SAMT induced DNA damage in the liver but there was no evidence of effects causing DNA oxidation or chromosome and genome damage. MDPI 2022-09-30 /pmc/articles/PMC9604968/ /pubmed/36286443 http://dx.doi.org/10.3390/md20100619 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Marzougui, Zeineb
Huet, Sylvie
Blier, Anne-Louise
Hégarat, Ludovic Le
Tounsi-Kettiti, Haïfa
Kharrat, Riadh
Marrouchi, Riadh
Fessard, Valérie
Investigation of the Genotoxic Potential of the Marine Toxin C17-SAMT Using the In Vivo Comet and Micronucleus Assays
title Investigation of the Genotoxic Potential of the Marine Toxin C17-SAMT Using the In Vivo Comet and Micronucleus Assays
title_full Investigation of the Genotoxic Potential of the Marine Toxin C17-SAMT Using the In Vivo Comet and Micronucleus Assays
title_fullStr Investigation of the Genotoxic Potential of the Marine Toxin C17-SAMT Using the In Vivo Comet and Micronucleus Assays
title_full_unstemmed Investigation of the Genotoxic Potential of the Marine Toxin C17-SAMT Using the In Vivo Comet and Micronucleus Assays
title_short Investigation of the Genotoxic Potential of the Marine Toxin C17-SAMT Using the In Vivo Comet and Micronucleus Assays
title_sort investigation of the genotoxic potential of the marine toxin c17-samt using the in vivo comet and micronucleus assays
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9604968/
https://www.ncbi.nlm.nih.gov/pubmed/36286443
http://dx.doi.org/10.3390/md20100619
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