DropLab: an automated magnetic digital microfluidic platform for sample-to-answer point-of-care testing-development...

Area of Science:

• Biomedical Engineering
• Microfluidics
• Immunodiagnostics

Background:

• Point-of-care testing (POCT) demands rapid, accurate diagnostic results near patients.
• Current POCT immunodiagnostics, like lateral flow assays (LFAs), lack sensitivity and quantification.
• Traditional enzyme-linked immunosorbent assays (ELISAs) offer sensitivity but require complex liquid handling unsuitable for POCT.

Purpose of the Study:

• To develop an automated, sample-in-answer-out POCT immunodiagnostic platform.
• To leverage magnetic digital microfluidic (MDM) technology for enhanced ELISA performance.
• To create a user-friendly device for sensitive and quantitative biomarker detection.

Main Methods:

• Developed DropLab, an automated POCT platform utilizing MDM technology.
• Implemented microbead-based ELISA within digitally controlled droplets.
• Designed a thermoformed disposable chip for parallel assay processing (4 ELISAs).

Main Results:

• DropLab achieved sensitive and quantitative results comparable to conventional microwell plate ELISAs.
• The platform demonstrated a limit of detection (LOD) matching traditional ELISA.
• Validated performance by measuring two protein targets and one antibody target.

Conclusions:

• DropLab successfully integrates MDM technology for automated, high-throughput POCT immunodiagnostics.
• The platform overcomes limitations of existing POCT assays, offering improved sensitivity and quantification.
• DropLab represents a significant advancement towards real-world medical applications of MDM technology.