Chemical-activated luciferase gene expression (CALUX)

A novel in vitro bioassay for Ah receptor active compounds in sediments and pore water

A. J. Murk, J. Legler, M. S. Denison, J. P. Giesy, C. Van De Guchte, A. Brouwer

Research output: Contribution to journalArticle

242 Citations (Scopus)

Abstract

This study demonstrates that the novel in vitro CALUX (chemical-activated luciferase expression) assay is a rapid, sensitive assay for assessing the toxic potency of (mixtures of) aryl hydrocarbon receptor (AhR)-active compounds in sediments and pore waters. A rat hepatoma (H4IIE) cell line, stably transfected with a construct containing the dioxin-responsive element (DRE) sequence and the luciferase reporter gene, was used to determine the relative potency or the total activities of AhR-active compounds in sediment and pore water extracts. This novel CALUX assay had a detection limit of 0.5 fmol of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). The sensitivity and linear working range was slightly better than for the ethoxyresorufin O-deethylase (EROD) assay in H4IIE wild type cells. The primary improvement of the CALUX assay compared to the EROD assay, however, is that the CALUX assay is insensitive to substrate inhibition. The CALUX activity induced by organic extracts from 450-mg aliquots of sediment or 250-μl aliquots of pore water corresponded with the instrumentally analyzed degree of pollution of the sediment. Using pore water, only a simple and rapid extraction procedure was needed, without additional clean-up to prevent cell death. The response from pore water samples in an 8-day early life stage test with zebra fish (Branchydanio rerio) corresponded with the CALUX induction, although the correlation was sometimes disturbed by heavy metals. Two polychlorinated terphenyl mixtures, the PCB-substitute Ugilec 141, polybrominated diphenylethers, and the PCB-mixture Clophen A50 were tested in the CALUX assay and had induction potencies that were 10-4-10-7 compared to TCDD.

Original languageEnglish (US)
Pages (from-to)149-160
Number of pages12
JournalToxicological Sciences
Volume33
Issue number1
StatePublished - Sep 1996

Fingerprint

Bioassay
Luciferases
Gene expression
Biological Assay
Assays
Sediments
Gene Expression
Water
Aryl Hydrocarbon Receptors
Cytochrome P-450 CYP1A1
Polychlorinated Biphenyls
Dioxins
In Vitro Techniques
Poisons
Zebrafish
Cell death
Heavy Metals
Reporter Genes
Fish
Limit of Detection

ASJC Scopus subject areas

  • Toxicology

Cite this

Murk, A. J., Legler, J., Denison, M. S., Giesy, J. P., Van De Guchte, C., & Brouwer, A. (1996). Chemical-activated luciferase gene expression (CALUX): A novel in vitro bioassay for Ah receptor active compounds in sediments and pore water. Toxicological Sciences, 33(1), 149-160.

Chemical-activated luciferase gene expression (CALUX) : A novel in vitro bioassay for Ah receptor active compounds in sediments and pore water. / Murk, A. J.; Legler, J.; Denison, M. S.; Giesy, J. P.; Van De Guchte, C.; Brouwer, A.

In: Toxicological Sciences, Vol. 33, No. 1, 09.1996, p. 149-160.

Research output: Contribution to journalArticle

Murk, AJ, Legler, J, Denison, MS, Giesy, JP, Van De Guchte, C & Brouwer, A 1996, 'Chemical-activated luciferase gene expression (CALUX): A novel in vitro bioassay for Ah receptor active compounds in sediments and pore water', Toxicological Sciences, vol. 33, no. 1, pp. 149-160.
Murk, A. J. ; Legler, J. ; Denison, M. S. ; Giesy, J. P. ; Van De Guchte, C. ; Brouwer, A. / Chemical-activated luciferase gene expression (CALUX) : A novel in vitro bioassay for Ah receptor active compounds in sediments and pore water. In: Toxicological Sciences. 1996 ; Vol. 33, No. 1. pp. 149-160.
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