High sensitivity, high surface area Enzyme-linked Immunosorbent Assay (ELISA)

Area of Science:

• Biotechnology
• Immunology
• Materials Science

Background:

• Enzyme-linked immunosorbent assays (ELISA) are the gold standard for immunological reactions and infectious disease detection.
• Current ELISA methods face limitations in sensitivity for certain diagnostic applications.

Purpose of the Study:

• To develop a more sensitive ELISA-based diagnostic tool for infectious diseases.
• To surpass the sensitivity limitations of the standard 96-well plate ELISA method.

Main Methods:

• A 3DStack device was fabricated using nanoimprinting and press stamping, increasing surface area 4-6 fold compared to 96-well plates.
• Analyte flow within the stacked sheets was enhanced via rotation, validated by Finite-Element (FE) simulation.
• The 3DStack was validated using an Immunoglobulin G (IgG) ELISA for Rubella virus antibodies.

Main Results:

• The 3DStack demonstrated up to 1.9-fold higher sensitivity in detecting antibodies compared to the standard ELISA method.
• The enhanced sensitivity is attributed to the increased surface area and optimized flow dynamics.

Conclusions:

• The 3DStack ELISA device offers a more sensitive diagnostic approach for infectious diseases.
• Nanoimprinting, press stamping, and rotational flow are key innovations contributing to improved ELISA sensitivity.