Advancing Point-of-Care Diagnosis: Digitalizing Combinatorial Biomarker Signals for Lupus Nephritis

Area of Science:

• Biomedical Engineering
• Medical Diagnostics
• Point-of-Care Testing

Background:

• Current healthcare systems require more efficient and accessible patient monitoring solutions.
• Novel homecare devices are crucial for improving healthcare efficiency and patient coverage.
• Lupus nephritis (LN) diagnosis and monitoring necessitate advanced yet user-friendly diagnostic tools.

Purpose of the Study:

• To develop a cost-effective, smartphone-based analyzing and reporting system (SBARS) for biomarker detection in lupus nephritis (LN).
• To provide a user-friendly homecare device as an alternative to expensive traditional laboratory equipment.
• To evaluate the system's performance in detecting and quantifying novel LN biomarkers.

Main Methods:

• Development of a portable, affordable microscopic reader for capturing biomarker signals.
• Utilization of smartphone-based image processing techniques for signal analysis and quantification.
• Comparative performance analysis against a commercial Genepix scanner for detecting VSIG4 and TNFRSF1b biomarkers.

Main Results:

• The SBARS demonstrated comparable performance to a commercial Genepix scanner in detecting VSIG4 and TNFRSF1b.
• The system achieved high predictive accuracy in discriminating LN patients with active renal disease from healthy controls.
• Area-under-the-curve (AUC) values of 0.9 for TNFRSF1b and 1.0 for VSIG4 were achieved.

Conclusions:

• The smartphone-based analyzing and reporting system (SBARS) is a viable, cost-effective tool for biomarker detection in lupus nephritis.
• This innovative system offers high diagnostic accuracy and potential for improved patient monitoring in homecare settings.
• SBARS represents a significant advancement in point-of-care diagnostics for lupus nephritis, enhancing accessibility and efficiency.