A bioluminescence assay for aldehyde dehydrogenase activity.
Sarah J Duellman1, Michael P Valley, Vinayaka Kotraiah
1Promega Corp., Madison, WI 53711, USA. Sarah.Duellman@promega.com
Analytical Biochemistry
|December 11, 2012
Summary
A new bioluminescence assay measures aldehyde dehydrogenase (ALDH) enzyme activity. This sensitive and stable assay offers advantages over traditional methods for high-throughput screening and drug discovery.
Area of Science:
- Biochemistry
- Enzymology
- Cell Biology
Background:
- Aldehyde dehydrogenase (ALDH) enzymes are vital for cellular stress response.
- ALDH enzymes are key therapeutic targets and stem cell biomarkers.
Purpose of the Study:
- To develop a novel, homogeneous bioluminescence assay for studying ALDH enzyme activity.
- To provide a sensitive and robust alternative to existing NADH fluorescence assays.
Main Methods:
- Utilized a proluciferin-aldehyde substrate recognized by ALDH isoforms.
- Generated a luminescent signal dependent on ALDH concentration and incubation time.
- Validated assay performance with an ALDH inhibitor and assessed assay window and robustness.
Main Results:
- The bioluminescence assay demonstrated high sensitivity and signal stability (>2 h).
- Assay performance showed accurate pharmacological response to an ALDH inhibitor.
- Achieved a large assay window (S/B=64) and high Z' value (0.75), indicating robustness.
Conclusions:
- The novel bioluminescence assay is a sensitive, stable, and robust tool for ALDH activity measurement.
- This assay facilitates high-throughput screening and drug discovery for ALDH-related pathways.
- Offers significant advantages over conventional NADH fluorescence assays.
