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Automated System for Single Molecule Fluorescence Measurements of Surface-immobilized Biomolecules
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Studies of fluorescence immunosensor using eggshell membrane as immobilization matrix.

Jieli Tang1, Lu Han, Yanhui Yu

  • 1College of Chemistry, Jilin University, Changchun, People's Republic of China.

Journal of Fluorescence
|October 5, 2010
PubMed
Summary

A new immunosensor utilizes eggshell membrane to detect human immunoglobulin M (HIgM) in serum. This cost-effective biosensor offers stable and biocompatible detection, presenting an alternative for antigen quantification.

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Area of Science:

  • Biomaterials Science
  • Immunosensor Technology
  • Analytical Chemistry

Background:

  • Accurate detection of human immunoglobulin M (HIgM) is crucial for diagnosing various medical conditions.
  • Existing methods for HIgM detection can be expensive and complex.
  • Novel, cost-effective, and stable platforms for immunosensing are needed.

Purpose of the Study:

  • To develop a novel immunosensor for detecting HIgM in serum using eggshell membrane as a support.
  • To evaluate the performance characteristics of the developed immunosensor, including sensitivity, specificity, and stability.
  • To explore the potential of eggshell membrane as a biocompatible platform for antibody immobilization.

Main Methods:

  • Fabrication of the immunosensor by immobilizing goat anti-human IgM antibody onto eggshell membrane using glutaraldehyde.
  • Utilizing a sandwich immunoassay format with FITC-labeled secondary antibodies for fluorescence detection.
  • Optimization of reaction conditions, including temperature and pH, to enhance sensor performance.

Main Results:

  • The developed immunosensor demonstrated a linear detection range for HIgM from 5-60 ng/mL with a detection limit of 4.3 ng/mL.
  • The sensor exhibited comparable performance to traditional immunonephelometric methods.
  • Remarkable storage stability, permeability, and high biocompatibility were observed for the eggshell membrane platform.

Conclusions:

  • The eggshell membrane serves as an effective and biocompatible immobilization platform for antibodies in immunosensor development.
  • The novel immunosensor provides a sensitive, stable, and cost-effective alternative for HIgM detection in serum.
  • This approach offers a new avenue for developing biosensors to determine various antigens and bioactive molecules.