In series:OECD Guidelines for the Testing of Chemicals, Section 4: Health Effectsview more titles
Published on July 29, 2016
Also available in: French
This Test Guideline describes an in vitro assay providing the methodology of Stably Transfected Transactivation to detect Androgen Receptor Agonists and Antagonists (AR STTA assays). The TA assay using a reporter gene technique is an in vitro tool that provides mechanistic data. The assay is used to establish signal activation or blocking of the androgen receptor caused by a ligand. Some chemicals may, in a cell type-dependent manner, display both agonist and antagonist activity and are known as selective androgen receptor modulators. Following the ligand binding, the receptor-ligand complex translocates to the nucleus where it binds specific DNA response elements and transactivates a firefly luciferase reporter gene, resulting in an increased cellular expression of the luciferase enzyme. Luciferin is a substrate that is transformed by the luciferase enzyme to a bioluminescence product that can be quantitatively measured with a luminometer. Luciferase activity can be evaluated quickly and inexpensively with a number of commercially available test kits. The test system provided in this Test Guideline utilises the AR-EcoScreenTM cell line.