Liquid crystal-based immunoassays for detecting hepatitis B antibody

Area of Science:

• Biomedical Engineering
• Analytical Chemistry
• Immunodiagnostics

Background:

• Conventional immunoassays often rely on fluorescence or enzyme labels, necessitating specialized readout equipment.
• These requirements limit the accessibility and practicality of immunoassays in resource-limited settings.

Purpose of the Study:

• To develop a novel liquid crystal (LC)-based immunoassay for detecting hepatitis B surface antigen.
• To create a diagnostic tool that eliminates the need for additional labeling and complex readout systems.

Main Methods:

• Development of a liquid crystal (LC)-based immunoassay utilizing a unique signal transduction mechanism.
• Visual assessment of colorful spots generated by the LC immunoassay for result interpretation.
• Quantification of anti-hepatitis B surface antigen concentrations through colorimetric analysis of LC spots.

Main Results:

• The LC-based immunoassay provides direct, naked-eye visualization of test results as colorful spots.
• The assay allows for the estimation of anti-hepatitis B surface antigen concentrations within a range of 300 to 15 nM.
• Elimination of the need for labeling and external readout systems was achieved.

Conclusions:

• The developed LC-based immunoassay offers a simplified and accessible method for hepatitis B diagnosis.
• Its suitability for point-of-care applications, especially in resource-limited regions, is highlighted.
• This approach represents a significant advancement over conventional, equipment-dependent immunoassays.