A Fluorometric CYP19A1 (Aromatase) Activity Assay in Live Cells
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Updated: Oct 30, 2025
Mass Spectrometry and Luminogenic-based Approaches to Characterize Phase I Metabolic Competency of In Vitro Cell Cultures
Published on: March 28, 2017
David K Heidary1, Sarah M Kriger1, Austin C Hachey1
1Department of Chemistry, University of Kentucky, 505 Rose St., Lexington, KY 40506, USA.
Abstract:
Inhibition of estrogen synthesis is an integral component of the frontline pharmacologic therapy for the treatment of estrogen receptor positive cancers. However, there is currently no direct, high-throughput-ready assay for aromatase (also known as CYP19A1) that can be performed in live cells. Herein we present a cell-based assay that allows for multiplexed assessment of enzyme activity, protein half-life, cell viability, and identification of inhibitors with slow off-rates.
Insights
A new cell-based assay enables live-cell measurement of aromatase (CYP19A1) activity, protein stability, and cell health. This tool aids in discovering potent cancer drugs with slow off-rates.
Area of Science:
- Biochemistry
- Enzymology
- Pharmacology
Background:
- Estrogen synthesis inhibition is key for estrogen receptor-positive cancers.
- Aromatase (CYP19A1) is a critical target for estrogen synthesis.
- Existing assays lack live-cell, high-throughput capabilities.
Purpose of the Study:
- To develop a novel cell-based assay for aromatase.
- To enable multiplexed assessment of enzyme activity and drug properties.
- To facilitate the discovery of novel aromatase inhibitors.
Main Methods:
- Development of a live-cell assay for aromatase (CYP19A1).
- Multiplexed analysis of enzyme activity, protein half-life, and cell viability.
- Screening for inhibitors with slow off-rate characteristics.
Main Results:
- Successful implementation of a cell-based assay for aromatase.
- Demonstrated capability for simultaneous measurement of multiple parameters.
- Identification of potential inhibitors with desirable pharmacokinetic properties.
Conclusions:
- The developed assay provides a valuable tool for aromatase research.
- This assay supports the discovery and characterization of novel cancer therapeutics.
- Enables efficient screening of inhibitors for estrogen receptor-positive cancers.
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