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Related Concept Videos

Enzyme-Linked Immunosorbent Assay01:33

Enzyme-Linked Immunosorbent Assay

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In 1971, Peter Perlman and Eva Engvall developed an Enzyme-linked immunosorbent assay (ELISA or EIA). ELISA differs from western blot in that the assays are conducted in microtiter plates or in vivo rather than on an absorbent membrane.
There are many different types of ELISAs, but they all involve an antibody molecule whose constant region binds an enzyme, leaving the variable region free to bind its specific antigen.  Enzyme-substrate reaction allows the antigen to be visualized or...
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Related Experiment Video

Updated: Feb 24, 2026

Author Spotlight: Advancements and Challenges in Hepatitis B Virus Detection
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Valuable antibody detection method for classifying hepatitis E virus genotypes.

Chenyan Zhao1, Yansheng Geng2, Weijing Huang1

  • 1Division of HIV/AIDS and Sex-transmitted Virus Vaccines, National Institutes for Food and Drug Control, Tiantanxili, Beijing, China.

Journal of Medical Virology
|August 18, 2017
PubMed
Summary
This summary is machine-generated.

A new enzyme immunoassay (EIA) using hepatitis E virus (HEV) ORF3 peptides offers a convenient and accurate method for classifying HEV genotypes. This serological approach surpasses traditional nucleotide-based methods for HEV diagnosis.

Keywords:
HEV genotypesORF3 peptidesanti-HEV immunoglobulin Genzyme immunoassayhepatitis E virus

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Area of Science:

  • Virology
  • Immunology
  • Diagnostic Development

Background:

  • Hepatitis E virus (HEV) classification traditionally relies on nucleotide-based methods.
  • Accurate and convenient genotype differentiation is crucial for HEV diagnosis and management.

Purpose of the Study:

  • To develop and evaluate a novel serological enzyme immunoassay (EIA) for classifying HEV genotypes.
  • To compare the efficacy of the developed EIA with conventional molecular approaches.

Main Methods:

  • Development of an EIA utilizing open reading frame 3 (ORF3) C-terminal peptides of HEV genotypes.
  • Testing of sera from immunized mice, HEV-infected monkeys, and human patients with the developed EIA.
  • Comparison of EIA sensitivity and specificity against commercial anti-HEV immunoglobulin G assays.

Main Results:

  • The developed EIA demonstrated high specificity in differentiating HEV genotypes 1, 3, and 4 using ORF3 peptides.
  • Clinical sera from HEV genotype 4 infected individuals showed 84.2% positivity with homologous peptides.
  • Indirect EIAs exhibited greater sensitivity and reactivity than commercial assays for HEV genotype 1 and 4 infections.

Conclusions:

  • Serological typing EIA assays using ORF3 peptides are effective and convenient for HEV genotype classification.
  • These assays can efficiently screen large sample volumes and differentiate HEV genotypes for improved diagnosis.
  • The developed EIA offers a promising alternative to molecular methods for HEV genotype determination.