Dual analyte detection using tandem flash luminescence

Area of Science:

• Biochemistry
• Analytical Chemistry
• Biotechnology

Background:

• Developing high-throughput assays for simultaneous detection of multiple analytes is crucial for various biological and clinical applications.
• Existing methods may face limitations in speed, sensitivity, or the ability to multiplex effectively.

Purpose of the Study:

• To present a novel heterogeneous, dual analyte-binding assay utilizing flash luminescence.
• To demonstrate the feasibility of resolving signals from two distinct luminescence labels sequentially within a single assay.
• To establish the utility of this assay format for high-throughput screening.

Main Methods:

• Employed a dual-analyte assay format incorporating both aequorin and acridinium-9-carboxamide labels.
• Utilized differential and sequential triggering of luminescence signals using Ca(2+) followed by basic peroxide.
• Resolved luminescence signals using a single photomultiplier tube, avoiding the need for multiwavelength detection.

Main Results:

• Successfully generated dose-response curves for two model analytes (biotinylated BSA and myoglobin) in a competitive binding format.
• Demonstrated clear resolution of signals from both luminescence labels without cross-interference.
• Achieved relatively short assay times due to the efficient signal generation and detection.

Conclusions:

• The presented tandem luminescence assay effectively allows for the simultaneous detection of dual analytes.
• The assay's speed and signal resolution make it highly suitable for developing dual analyte high-throughput assays.
• This approach offers a promising platform for advancing multiplexed detection technologies.