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Related Experiment Video

Updated: May 12, 2026

Quantifying Myeloperoxidase-DNA and Neutrophil Elastase-DNA Complexes from Neutrophil Extracellular Traps by Using a Modified Sandwich ELISA
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Aptamer-capture based assays for human neutrophil elastase.

Lin Cheng1, Qiang Zhao

  • 1Research Center for Environmental Science and Engineering, Shanxi University, Taiyuan 030006, China.

Talanta
|April 20, 2013
PubMed
Summary

New aptamer-based assays detect human neutrophil elastase (HNE) with high sensitivity and specificity. These assays offer customizable options for simplicity, high throughput, and improved detection limits for HNE in various applications.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Assay Development

Background:

  • Human neutrophil elastase (HNE) is a key serine protease implicated in infection defense, inflammation, and various disease pathologies.
  • Accurate detection of HNE is crucial for understanding and managing these conditions.

Purpose of the Study:

  • To develop and optimize aptamer-capture based assays for sensitive and specific detection of human neutrophil elastase (HNE).
  • To offer versatile assay formats adaptable to different needs, including simplicity, high throughput, and enhanced sensitivity.

Main Methods:

  • Immobilization of HNE-specific aptamers onto magnetic beads or microplates as affinity capture agents.
  • Enzymatic conversion of chromogenic or fluorogenic substrates by captured HNE to generate detectable products.
  • Optimization of assay conditions using different substrates and solid supports to maximize sensitivity and efficiency.

Main Results:

  • Aptamer-capture assays successfully detected HNE with high specificity, showing no interference from other proteins.
  • Assays utilizing magnetic beads and chromogenic substrates achieved a detection limit of 0.4 pM HNE.
  • Fluorogenic substrates further enhanced sensitivity, reaching a detection limit of 20 fM HNE.
  • Aptamer-coated microplates provided sensitive detection with advantages in sample handling and measurement speed.

Conclusions:

  • Developed aptamer-capture assays provide a sensitive, specific, and versatile platform for HNE detection.
  • The assay formats can be tailored for various applications requiring different levels of sensitivity and throughput.
  • These assays hold promise for research and clinical diagnostics involving HNE.