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A chimeric reporter gene allowing for clone selection and high-throughput screening of reporter cell lines expressing G-protein-coupled receptors

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Author

Summary, in English

Efficient screening of ligands interacting with G-protein-coupled receptors is central for modern drug development. Here, we describe an optimized reporter vector primarily intended for use in reporter cell lines expressing such receptors. The construct consists of a synthetic enhancer containing 9x TRE (12-O-tetradecanoylphorbol-13-acetate-responsive elements) fused to a minimal CMV (cytomegalovirus) promoter. Activation of the promoter construct leads to the expression of a chimeric reporter protein based on the genes for enhanced green fluorescent protein and Photinus luciferase. The chimeric protein allows for both clonal selection by fluorescence, which facilitates the selection of optimal reporter cell lines and high-throughput screening by luminescens. In designing the vector, increasing numbers of TRE motifs were tested in front of two different minimal promoters. The reporter gene was more strongly inducible with increasing numbers of TRE motifs. The constructs were tested in two cell lines, CHO and HeLa. The latter regulated reporter gene activity stronger in response to PMA (phorbol 12-myristate 13-acetate) stimulation and were used to construct HF1 reporter cell lines. Model experiments were carried out on these reporter cells transfected with the human BLTR, human CCR5, or the rat alpha(1b) receptor. After maximal agonist stimulation reporter gene activity was increased 200-, 15-, and 50-fold, respectively.

Department/s

  • Immunology
  • Drug Target Discovery

Publishing year

2001

Language

English

Pages

209-215

Publication/Series

Analytical Biochemistry

Volume

288

Issue

2

Document type

Journal article

Publisher

Elsevier

Topic

  • Pharmacology and Toxicology
  • Immunology in the medical area

Keywords

  • GPCR
  • GFP
  • luciferase
  • reporter gene assay
  • activating protein 1

Status

Published

Research group

  • Immunology
  • Drug Target Discovery

ISBN/ISSN/Other

  • ISSN: 1096-0309