A paper microfluidics-based fluorescent lateral flow immunoassay for point-of-care diagnostics of non-communicable diseases

Analyst. 2019 Nov 7;144(21):6291-6303. doi: 10.1039/c9an01382b. Epub 2019 Sep 24.

Abstract

In the emergency diagnosis of patients, acute myocardial infarction (AMI) is always time-consuming to diagnose, and the process requires multiple laboratory procedures, expensive equipment and skilled workers. Herein, we developed an easy-to-use, low-cost and portable fluorescent lateral flow immunoassay based on paper microfluidics for the point-of-care diagnostics of non-communicable diseases. The fluorescent lateral flow immunoassay can produce results in less than 10 minutes, and the limit of detection (LOD) is 0.019 ng ml-1. The slope was linear from 0 to 100 ng ml-1; the equation is y = 0.0342e2.1181x and R2 = 0.9618, which are distinctive features that ensure maximum amplification of the signal and recording of quantitative values by an analyser. The detection sensitivity showed an exceptional increase to 0.01 ng ml-1. Compared with conventional bioassay readers, our analyser shows some advantages to easily, clearly and effectively read data. The present point-of-care test for cardiac troponin I decreases the turnaround time and has a high coefficient of variation even at lower concentrations of troponin. So, the development of lateral flow assay-based point-of-care assays with higher analytical performance for real world samples can decrease the rule-out time for AMI in emergency departments and other fields.

MeSH terms

  • Collodion / chemistry
  • Diagnostic Techniques and Procedures / instrumentation*
  • Immunoassay / instrumentation*
  • Lab-On-A-Chip Devices*
  • Membranes, Artificial
  • Myocardium / metabolism
  • Noncommunicable Diseases*
  • Paper*
  • Point-of-Care Systems*
  • Spectrometry, Fluorescence
  • Troponin T / analysis
  • Troponin T / metabolism

Substances

  • Membranes, Artificial
  • Troponin T
  • Collodion