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University of Stirling


Article in Journal

Tributyltin is a potent inhibitor of piscine peroxisome proliferator-activated receptor α and β

Colliar L, Sturm A & Leaver M (2011) Tributyltin is a potent inhibitor of piscine peroxisome proliferator-activated receptor α and β, Comparative Biochemistry and Physiology - Part C: Toxicology and Pharmacology, 153 (1), pp. 168-173.

Increasing evidence suggests that common environmental contaminants can act as endocrine disrupters in fish. However, current data are biased towards environmental estrogens, highlighting the need to elucidate potential pollutant impact on other endocrine axes. Here, we report a highthroughput assay to identify chemicals interacting with piscine peroxisome proliferator-activated receptors (PPARs). Our transactivation assay employs a fish cell line and uses recombinant proteins combining the yeast Gal4 DNA-binding domain with the ligand-binding domain of PPARs from plaice. Compared to assays with full-length PPARs, this approach circumvents interaction of chemicals binding to retinoid X receptors, which form heterodimers with PPAR and many other nuclear receptors. Plaice PPARa and PPARb are activated by fibrate drugs and by phthalate monoesters at concentrations similar to those activating the homologous mammalian receptors. In line with their assumed role as central transcriptional regulators of energy homostasis, a number of fatty acids activate plaice PPARa and PPARb. In contrast, tributyl tin oxide (TBTO) is a potent antagonist of PPARa and PPARb, showing activity at environmentally relevant concentrations of TBTO (1-50 nM). Given the ubiquitous and persistent nature of TBTO, the possibility that chronic environmental effects are occurring via disruption of PPAR signalling in fish should be further investigated. Keywords: tributyltin, TBTO, PPAR, pollutant, fibr

Subject headings
Tributyltin; Water Pollution; Pollution Environmental aspects.; Endocrine toxicology

AuthorsColliar Louise, Sturm Armin, Leaver Michael
Publication date01/2011
Publication date online28/10/2010
Date accepted by journal01/01/1990
ISSN 1532-0456

Comparative Biochemistry and Physiology - Part c: Toxicology and Pharmacology: Volume 153, Issue 1 (2011-01)

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