Orthogonal assay and QSAR modelling of Tox21 PPARγ antagonist in vitro high-throughput screening assay

Jacob Ardenkjær-Skinnerup, Ana Caroline Vasconcelos Engedal Nissen, Nikolai Georgiev Nikolov, Niels Hadrup, Gitte Ravn-Haren, Eva Bay Wedebye, Ulla Vogel

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Disruption of signalling mediated by the nuclear receptor peroxisome proliferator-activated receptor gamma (PPARγ) is associated with risk of cancer, metabolic diseases, and endocrine disruption. The purpose of this study was to identify environmental chemicals acting as PPARγ antagonists. Data from the Tox21 PPARγ antagonism assay were replicated using a reporter system in HEK293 cells. Two quantitative structure-activity relationship (QSAR) models were developed, and five REACH-registered substances predicted positive were tested in vitro. Reporter assay results were consistent with Tox21 data since all conflicting results could be explained by assay interference. QSAR models showed good predictive performance, and follow-up experiments revealed two PPARγ antagonists out of three non-interfering chemicals. In conclusion, the developed QSAR models and follow-up experiments are important steps in the discovery of potential endocrine- and metabolism-disrupting chemicals.

Original languageEnglish
JournalEnvironmental Toxicology and Pharmacology
Volume105
Pages (from-to)104347
ISSN1382-6689
DOIs
Publication statusPublished - Jan 2024

Keywords

  • HEK293 Cells
  • High-Throughput Screening Assays/methods
  • Humans
  • PPAR gamma/genetics
  • Quantitative Structure-Activity Relationship

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