Deconvolution of Luminescence Cross-Talk in High-Throughput Gene Expression Profiling

Area of Science:

• Molecular Biology
• Biotechnology
• Biophysics

Background:

• Luciferase reporters are standard genetic tools for real-time, high-throughput gene expression monitoring.
• Luciferase assays offer superior signal-to-noise ratios compared to fluorescence proteins due to lower cellular autofluorescence.
• A key limitation of luciferase reporters is light emission cross-talk between adjacent wells in microplates.

Purpose of the Study:

• To develop a computational method for correcting luminescence bleed-through in microplate-based assays.
• To accurately estimate true luminescence activity per well by deconvolving light signals.

Main Methods:

• A computational method was developed using a calibration plate to determine a "light-spread function".
• This function, derived from a single luminescent well, estimates light emission spread.
• The light-spread function is used to deconvolve luminescence measurements from other wells under identical conditions.

Main Results:

• The developed method effectively corrects for luminescence bleed-through, improving signal accuracy.
• The correction method preserves low-level luminescence signals near the background noise.
• The computational approach demonstrated universal applicability across various microplate readers and plate types.

Conclusions:

• The computational method provides a robust solution for mitigating cross-talk in luciferase reporter assays.
• Accurate deconvolution of luminescence signals enhances the reliability of high-throughput gene expression studies.
• This technique offers a universally applicable tool for optimizing luminescence-based assays in diverse research settings.