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Diaz de Cerio O, Bilbao E, Izagirre U, Etxebarria N, Moreno G, Díez G, Cajaraville MP, Cancio I. Toxicology tailored low density oligonucleotide microarray for the thicklip grey mullets (Chelon labrosus): Biomarker gene transcription profile after caging in a polluted harbour. MARINE ENVIRONMENTAL RESEARCH 2018; 140:265-277. [PMID: 30042060 DOI: 10.1016/j.marenvres.2018.06.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 06/06/2018] [Accepted: 06/11/2018] [Indexed: 06/08/2023]
Abstract
In aquatic organisms inhabiting polluted waters genes are activated to build an adaptive/compensatory defence against the possible effects of pollutants. Such responses can be used as biomarkers of exposure to chemical compounds, outlining the molecular mechanisms activated under specific pollution scenarios. With the aim of exploiting such approach in environmental health assessment, toxicologically relevant gene fragments were sequenced in the thicklip grey mullet (Chelon labrosus) and a toxicologically tailored low-density (160 genes) oligonucleotide microarray was customised. The tool was validated comparing organ/sex specific gene expression profiles and characterising responses under laboratory exposure to model chemicals. Finally, juvenile mullets were caged in a polluted harbour and hepatic gene expression profiles analysed after 5 and 21 days of deployment. Cages were deployed in the inner (IH) and outer (OH) Pasaia harbour, Bay of Biscay. Mussels (Mytilus galloprovincialis) were also caged as biological matrix for chemical bioaccumulation analysis and stress biomarkers measurements. Slightly higher concentrations of chemicals (metals, tributyltin, PAHs, phthalates) were quantified in IH than in OH, fish bile metabolites also revealing higher availability of PAHs in IH. Lysosome membrane stability in mussels was reduced, indicating stress condition in both sites. The developed microarray discriminated mullets showing distinctive expression profiles depending on site and deployment time. Genes related to immune and hypoxia responses were regulated comparing IH and OH at day 5. Phase I and II biotransformation genes, such as cyp2, cyp3 and ugt, were up-regulated in IH, together with the aryl hydrocarbon receptor 2 (ahr2) and the ahr repressor. Similarly, TBT-binding proteins and genes involved in lipid metabolism (pparγ, cyp7) were up-regulated with deployment time. Even if nowadays higher throughput approaches for gene expression analyses are available, the developed mullet tool constitutes a comprehensive tool to assess molecular responses of mullets exposed to pollutants, although it remains to be explored whether it can be applied to assess pollutant exposure in active pollution monitorings and in environmental health assessment.
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Affiliation(s)
- O Diaz de Cerio
- CBET Res. Group. Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU) and Zoology and Cell Biology Dept. (Fac. Science and Technology), University of the Basque Country (UPV/EHU), E-48080, Bilbao, PO Box 644, Basque Country, Spain
| | - E Bilbao
- CBET Res. Group. Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU) and Zoology and Cell Biology Dept. (Fac. Science and Technology), University of the Basque Country (UPV/EHU), E-48080, Bilbao, PO Box 644, Basque Country, Spain
| | - U Izagirre
- CBET Res. Group. Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU) and Zoology and Cell Biology Dept. (Fac. Science and Technology), University of the Basque Country (UPV/EHU), E-48080, Bilbao, PO Box 644, Basque Country, Spain
| | - N Etxebarria
- IBEA Res Group. Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU) and Analytical Chemistry Dept. (Fac. Science and Technology), University of the Basque Country (UPV/EHU), E-48080, Bilbao, PO Box 644, Basque Country, Spain
| | - G Moreno
- International Seafood Sustainability Foundation (ISSF), 805 15th Street NW, Washington, DC, 20005, USA
| | - G Díez
- AZTI, Marine Research Division, Txatxarramendi irla z/g, 48395, Sukarrieta, Bizkaia, Spain
| | - M P Cajaraville
- CBET Res. Group. Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU) and Zoology and Cell Biology Dept. (Fac. Science and Technology), University of the Basque Country (UPV/EHU), E-48080, Bilbao, PO Box 644, Basque Country, Spain
| | - I Cancio
- CBET Res. Group. Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU) and Zoology and Cell Biology Dept. (Fac. Science and Technology), University of the Basque Country (UPV/EHU), E-48080, Bilbao, PO Box 644, Basque Country, Spain.
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Bilbao E, Cajaraville MP, Cancio I. Cloning and expression pattern of peroxisomal β-oxidation genes palmitoyl-CoA oxidase, multifunctional protein and 3-ketoacyl-CoA thiolase in mussel Mytilus galloprovincialis and thicklip grey mullet Chelon labrosus. Gene 2009; 443:132-42. [DOI: 10.1016/j.gene.2009.05.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Revised: 04/24/2009] [Accepted: 05/13/2009] [Indexed: 11/17/2022]
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Viarengo A, Lowe D, Bolognesi C, Fabbri E, Koehler A. The use of biomarkers in biomonitoring: a 2-tier approach assessing the level of pollutant-induced stress syndrome in sentinel organisms. Comp Biochem Physiol C Toxicol Pharmacol 2007; 146:281-300. [PMID: 17560835 DOI: 10.1016/j.cbpc.2007.04.011] [Citation(s) in RCA: 144] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2007] [Revised: 03/30/2007] [Accepted: 04/07/2007] [Indexed: 11/30/2022]
Abstract
The paper outlines a 2-tier approach for wide-scale biomonitoring programmes. To obtain a high level of standardization, we suggest the use of caged organisms (mussels or fish). An "early warning", highly sensitive, low-cost biomarker is employed in tier 1 (i.e. lysosomal membrane stability (LMS) and survival rate, a marker for highly polluted sites). Tier 2 is used only for animals sampled at sites in which LMS changes are evident and there is no mortality, with a complete battery of biomarkers assessing the levels of pollutant-induced stress syndrome. Possible approaches for integrating biomarker data in a synthetic index are discussed, along with our proposal to use a recently developed Expert System. The latter system allows a correct selection of biomarkers at different levels of biological organisation (molecular/cellular/tissue/organism) taking into account trends in pollutant-induced biomarker changes (increasing, decreasing, bell-shape). A selection of biomarkers of stress, genotoxicity and exposure usually employed in biomonitoring programmes is presented, together with a brief overview of new biomolecular approaches.
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Affiliation(s)
- A Viarengo
- Department of Environmental and Life Sciences (DiSAV), University of Piemonte Orientale, Via Bellini 25/G 15100 Alessandria, Italy.
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