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Título: | A noninvasive test of exposition to toxicants: quantitative analysis of cytochrome P4501A expression in fish scales |
Autor: | Quirós, Laia CSIC; Raldúa, Demetrio CSIC ORCID ; Navarro Cuenca, Anna CSIC; Casado, Marta CSIC ORCID ; Barceló, Damià CSIC ORCID; Piña, Benjamín CSIC ORCID | Palabras clave: | Quantitative real-time polymerase chain reaction Fish ecotoxicology Genetic biomarkers Environmental biomonitoring Aryl hydrocarbon receptor |
Fecha de publicación: | oct-2007 | Editor: | SETAC (Society) | Citación: | Environmental Toxicology and Chemistry 26(10): 2179-2186 (2007) | Resumen: | Elevated expression of cytochrome P4501A (CYP1A) is an established biomarker for exposition to a wide range of toxicants, particularly for dioxin and structurally similar compounds. Expression of CYP1A usually is analyzed in internal organs, which involves dissection of the specimen. To avoid unnecessary animal killing, we present here an alternative method based on the monitoring of CYP1A expression in fish scales. Using β-naphthoflavone (BNF; 50 mg/kg body wt, intraperitoneal injection) as inducer in goldfish (Carassius auratus), we monitored levels of CYP1A mRNA both in scales and liver of treated and control specimens. Treatment with BNF resulted in a similar induction of CYP1A gene in both tissues, although scales responded faster (at 8 h after treatment) than liver (between 24 and 48 h). The scale-based test has the unique advantage of allowing sequential testing in the same specimen, which facilitates analysis of the time course of CYP1A induction and allows the study of individual variability. The method implies minimal suffering of the animals, because it only requires removal of a moderate (n = 1–3) number of scales for each time point. This nondestructive, fast, and relatively inexpensive test for toxic exposure therefore is suitable for environmental monitoring and food safety control programs in which specimen preservation is required. | Descripción: | 8 pages, 3 tables, 3 figures.-- PMID: 17867895 [PubMed]. | Versión del editor: | http://dx.doi.org/10.1897/07-027R.1 | URI: | http://hdl.handle.net/10261/11040 | DOI: | 10.1897/07-027R.1 | ISSN: | 0730-7268 | E-ISSN: | 1552-8618 |
Aparece en las colecciones: | (IBMB) Artículos (IDAEA) Artículos |
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