Recent advances in sensitivity enhancement for lateral flow assay

Area of Science:

• Biomedical Engineering
• Analytical Chemistry
• Point-of-Care Diagnostics

Background:

• Lateral flow assays (LFAs) are widely used for qualitative detection in food safety, environmental monitoring, and disease diagnosis.
• Conventional LFAs rely on visual colorimetric detection, limiting sensitivity for low-level disease biomarkers.
• While nanomaterials enhance LFAs, additional readers can restrict their practical application.

Purpose of the Study:

• To review and objectively evaluate current methods for enhancing the sensitivity of lateral flow assays.
• To discuss future directions and challenges in the development of more sensitive LFAs.

Main Methods:

• Summarization of reported LFA sensitivity enhancement techniques.
• Objective evaluation of methods including sample pretreatment, flow rate modification, and label evolution.
• Analysis of existing literature on LFA sensitivity improvements.

Main Results:

• Identified key strategies for improving LFA sensitivity, addressing limitations in low-biomarker detection.
• Evaluated the effectiveness of various approaches such as sample pretreatment, altered flow dynamics, and advanced labeling materials.
• Highlighted the trade-offs and potential of different enhancement methods.

Conclusions:

• Significant advancements in LFA technology are enabling more sensitive detection of disease biomarkers.
• Continued research into sample preparation, fluidics, and novel labels is crucial for future LFA development.
• Overcoming current challenges will expand LFA applications in early disease diagnosis and monitoring.