Overview of Gas-Generating-Reaction-Based Immunoassays

Area of Science:

• Biomedical Engineering
• Analytical Chemistry
• Immunosensing Technologies

Background:

• Point-of-care (POC) immunoassays are emerging as powerful alternatives to traditional methods for sensitive, real-time target detection.
• Gas-generating reaction-based immunoassays leverage antibody-modified enzymes or nanoparticles to catalyze reactions, converting immunorecognition into easily recordable gas pressure signals.
• These assays offer advantages like rapid measurement, direct reading, simple operation, and low cost, making them suitable for various applications.

Purpose of the Study:

• To review and summarize recent advancements in gas-generating-reaction-based immunoassays.
• To categorize these immunoassays based on their distinct signal output systems.
• To highlight the role of photothermal materials and the underlying working principles.

Main Methods:

• Review of literature on gas-generating-reaction-based immunoassays.
• Categorization of assays by signal output: distance-based readout, pressure differential, visualized detection, and thermal measurement.
• Focus on the application of photothermal materials in these assays.

Main Results:

• Gas-generating immunoassays effectively convert immunorecognition events into measurable gas signals.
• Diverse signal readout systems (distance, pressure, visual, thermal) have been developed.
• Photothermal materials play a significant role in specific assay designs.

Conclusions:

• Gas-generating-reaction-based immunoassays represent a promising field for POC diagnostics.
• Further development is needed to address current challenges and unlock future potential.
• These assays offer a versatile platform for sensitive and rapid detection.