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Acute Exposure to Crude Oil Induces Epigenetic, Transcriptional and Metabolic Changes in Juvenile Sciaenops ocellatus

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Abstract

In this study, we report molecular and metabolic responses of Sciaenops ocellatus during an acute oil exposure bioassay (100, 800 and 8000 mg 1–1 of crude oil). The global DNA methylation and expression profiles of key genes of the xenobiotic biotransformation system (cytochrome P450 1A [cyp1a] and glutathione S-tranferase [gst]), oxidative stress system (glutathione peroxidase [gpx], catalase [cat], aldehyde dehydrogenase [aldh]) and reproductive system (vitellogenin [vtg]) were evaluated. At the metabolic level, we evaluated the concentration of four polycyclic aromatic hydrocarbon (PAH) metabolites -hydroxybenzo[a]pyrene, hydroxypyrene, hydroxynaphthalene and hydroxyphenanthrene- in fish bile. The results of this study revealed that fish exposed to crude oil exhibited hypomethylation of DNA, up-regulation of cyp1a and gst and down-regulation of gpx, cat, aldh and vtg and high concentrations of PAH metabolites with respect to the control.

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Acknowledgements

We thank the staff of the Patología Acuática, Inmunologia y Biología Molecular and Geoquímica Marina laboratory of CINVESTAV, Mérida, for technical assistance and sample handling. We also thank to Dra. Abril Rodríguez-González, Danilú Couoh Puga, Clara Vivas Rodríguez, Gregory Arjona Torres and Víctor Ceja Moreno for technical assistance.

Funding

This research has been funded by the Mexican National Council for Science and Technology—Mexican Ministry of Energy—Hydrocarbon Fund, project 201441. This is a contribution of the Gulf of Mexico Research Consortium (CIGoM). We acknowledge PEMEX’s specific request to the Hydrocarbon Fund to address the environmental effects of oil spills in the Gulf of Mexico.

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Correspondence to Carlos A. Puch-Hau.

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The authors declare that they have no conflict of interest.

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This study was conducted in accordance with the Guidelines for Care and Manipulation of Laboratory Animals (PICUAL-CINVESTAV, 2002), the Mexican Official Norm (de Aluja, 2002, NOM-062-ZOO-1999), and the Guide for the Care and Use of Laboratory Animals used by the US National Institute of Health (http://www.aaalac.org/resources/Guide_2011.pdf).

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Cañizares-Martínez, M.A., Quintanilla-Mena, M., Del-Río-García, M. et al. Acute Exposure to Crude Oil Induces Epigenetic, Transcriptional and Metabolic Changes in Juvenile Sciaenops ocellatus. Bull Environ Contam Toxicol 108, 85–92 (2022). https://doi.org/10.1007/s00128-021-03241-4

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  • DOI: https://doi.org/10.1007/s00128-021-03241-4

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