Identification of novel Ah receptor agonists using a high-throughput green fluorescent protein-based recombinant cell bioassay

Scott R. Nagy, Gang Liu, Kit Lam, Michael S. Denison

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The Ah receptor is a ligand-dependent transcription factor that mediates the biological and toxic effects of polycyclic aromatic hydrocarbons and halogenated aromatic hydrocarbons such as 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD, dioxin). Recent evidence also suggests a role for the AhR in normal physiology and development. Although a variety of structurally diverse chemicals are reported to bind to and activate the AhR, the full spectrum of structural chemical classes that can interact with the AhR remains to be elucidated. Large-scale analysis of the ligand binding specificity of the AhR requires the use of a high-throughput AhR bioassay system for chemical screening. We have utilized a recombinant mouse hepatoma cell line (H1G1.1c3) containing a stably integrated TCDD- and AhR-responsive enhanced green fluorescent protein (EGFP) reporter gene to screen a 1,5-dialkylamino-2,4-dinitrobenzene combinatorial chemical library consisting of 155 parental amines and up to 12 090 combinatorial products in less than 7 days for novel AhR agonists. These analyses have identified numerous parental amines as relatively potent inducers of EGFP (with EC50s between 8 and 1000 μM) and also have revealed several novel products of the combinatorial chemical library synthesis with EC50s between 10 and 100 μM. Overall, these results have not only allowed the identification of novel activators of the AhR but also demonstrate the utility of the recombinant H1G1.1c3 cell bioassay for high-throughput chemical screening.

Original languageEnglish (US)
Pages (from-to)861-868
Number of pages8
JournalBiochemistry
Volume41
Issue number3
DOIs
StatePublished - Jan 22 2002

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Bioassay
Green Fluorescent Proteins
Biological Assay
Small Molecule Libraries
Throughput
Amines
Halogenated Hydrocarbons
Ligands
Aromatic Hydrocarbons
Dioxins
Poisons
Polycyclic Aromatic Hydrocarbons
Reporter Genes
Hepatocellular Carcinoma
Screening
Transcription Factors
Cell Line
Physiology
Polychlorinated Dibenzodioxins
Genes

ASJC Scopus subject areas

  • Biochemistry

Cite this

Identification of novel Ah receptor agonists using a high-throughput green fluorescent protein-based recombinant cell bioassay. / Nagy, Scott R.; Liu, Gang; Lam, Kit; Denison, Michael S.

In: Biochemistry, Vol. 41, No. 3, 22.01.2002, p. 861-868.

Research output: Contribution to journalArticle

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