Cost-Effective and High-Throughput LPS Detection via Microdroplet Technology in Biopharmaceuticals

Area of Science:

• Biotechnology
• Analytical Chemistry
• Microfluidics

Background:

• Lipopolysaccharides (LPS) from Gram-negative bacteria pose significant industrial challenges.
• Traditional endotoxin detection methods (RPT, LAL assay) are costly, slow, and reagent-intensive.
• Existing methods have limitations in scalability and application, especially in resource-limited settings.

Purpose of the Study:

• To develop an innovative microfluidic platform for enhanced lipopolysaccharide (LPS) detection.
• To miniaturize and improve the Limulus Amebocyte Lysate (LAL) assay using microdroplet technology.
• To provide a scalable, cost-effective, and sensitive alternative for endotoxin detection.

Main Methods:

• Integration of the LAL assay within a microfluidic platform using microdroplets.
• Utilizing precise fluid control and reaction isolation for enhanced assay performance.
• Colorimetric measurements for LPS detection and calibration, with path-length normalization.

Main Results:

• The microfluidic LAL assay demonstrated high sensitivity and accuracy for LPS detection.
• Achieved lower detection limits and comparable or improved performance versus traditional methods.
• Exhibited low intra-assay variability (CV ≈ 0.9%) and a quantifiable limit of detection (LOD).

Conclusions:

• The microfluidic microdroplet LAL assay is a viable proof-of-concept for miniaturized endotoxin detection.
• This scalable, cost-effective, and sustainable approach addresses limitations of conventional methods.
• The technology offers a practical solution for endotoxin detection in diagnostics, biopharmaceuticals, and environmental monitoring.